CN108963985A - Power distribution protective device, system and method - Google Patents
Power distribution protective device, system and method Download PDFInfo
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- CN108963985A CN108963985A CN201810812711.7A CN201810812711A CN108963985A CN 108963985 A CN108963985 A CN 108963985A CN 201810812711 A CN201810812711 A CN 201810812711A CN 108963985 A CN108963985 A CN 108963985A
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- effective
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- power distribution
- protective device
- threshold value
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention provides a kind of power distribution protective device, system and method, and described device includes: the voltage acquisition unit for adopting three-phase voltage signal；For acquiring the current acquisition unit of three-phase current signal and zero sequence current signal；It is electrically connected with voltage acquisition unit and current acquisition unit, obtains the data processing unit of effectively electric data for carrying out data processing to three-phase voltage signal, three-phase current signal and zero sequence current signal；For regulating and controlling the breaking units of the on-off line state of distribution system；It is electrically connected with breaking units and data processing unit, for carrying out the control unit of on-off road regulation to distribution system according to effectively electric data control breaking units；And be electrically connected with control unit, for effective electric data to be sent to using wired or wireless communication mode the communication unit of other electronic equipments under the control of the control unit.Described device can carry out line electrical leakage protection, and send effectively electric data by wirelessly or non-wirelessly communication and give other electronic equipments.
Description
Technical field
The present invention relates to power distribution protection technical fields, in particular to a kind of power distribution protective device, system and method.
Background technique
With the continuous development of distribution technique, distribution system has become indispensable a part in people's daily life,
And for distribution system, how to carry out route O&M and power distribution information collection to distribution system is one and particularly important asks
Topic.
Currently, traditional residual current action protector can carry out local type trip protection to distribution system, but this
Traditional residual current action protector can only also realize local type trip protection, there is very big lack in power distribution information collection
It falls into, the mode for needing operation maintenance personnel artificially to extract power distribution information from each residual current action protector can realize that information is received
Collection, human resources consumption is big, can not carry out Centralized Monitoring and centralized management for the distribution system being distributed in a region.
Summary of the invention
In order to overcome above-mentioned deficiency in the prior art, the purpose of the present invention is to provide a kind of power distribution protective device, it is
System and method, the power distribution protective device can carry out line electrical leakage protection to distribution system, and by wireless communication or wired
Effective electric data of distribution system are sent to other electronic equipments by the mode of communication, are reduced human resources consumption, are easy to implement
The Centralized Monitoring of distribution system and centralized management.
For device, the embodiment of the present invention provides a kind of power distribution protective device, and described device includes:
For acquiring the voltage acquisition unit of the three-phase voltage signal of distribution system；
For acquiring the three-phase current signal of the distribution system and the current acquisition unit of zero sequence current signal；
It is electrically connected with the voltage acquisition unit and the current acquisition unit, for the collected three-phase
Voltage signal, the three-phase current signal and addressed zero sequence current signal carry out data processing, obtain the distribution system
The effectively data processing unit of electricity data, wherein effective electric data include effective three-phase electricity corresponding with the distribution system
Pressure, effective three-phase current and effective zero-sequence current；
For regulating and controlling the breaking units of the on-off line state of the distribution system；
It is electrically connected with the breaking units and the data processing unit, for controlling institute according to effective electric data
State the control unit that breaking units regulate and control the on-off line state of the distribution system；And
It is electrically connected with described control unit, for using wired communication modes or nothing under the control of described control unit
Effective electric data are sent to the communication unit of other electronic equipments by line communication pattern.
Optionally, in embodiments of the present invention, above-mentioned voltage acquisition unit includes voltage transformer；
The external distribution system of the signal acquisition terminal of the voltage transformer, with the three-phase voltage to the distribution system
Signal carries out signal acquisition；
The acquisition output end of the voltage transformer is connect with the data processing unit, with to the data processing unit
Transmission is by the collected three-phase voltage signal of the voltage transformer.
Optionally, in embodiments of the present invention, above-mentioned current acquisition unit includes current transformer；
The external distribution system of the signal acquisition terminal of the current transformer, with the three-phase current to the distribution system
Signal and zero sequence current signal carry out signal acquisition；
The acquisition output end of the current transformer is connect with the data processing unit, with to the data processing unit
Transmission is by the collected three-phase current signal of the current transformer and the zero sequence current signal.
Optionally, in embodiments of the present invention, above-mentioned breaking units include breaker, and the breaker is linked into described match
In the route of electric system, the breaking units ensure that the distribution system is in channel status or breaking shape by the breaker
State.
Optionally, in embodiments of the present invention, above-mentioned communication unit includes carrier wave wireless dual mode communication module, the communication
Unit is carried out data transmission by the carrier wave wireless dual mode communication module using wired communication modes or wireless communications mode.
For system, the embodiment of the present invention provides a kind of power distribution protection system, the system comprises distribution transformer terminals and extremely
Few any one above-mentioned power distribution protective device；
The power distribution protective device and the distribution transformer terminals communicate to connect, and match for obtain the power distribution protective device
Effective electric data of electric system are sent to the distribution transformer terminals, assign manipulation from the distribution transformer terminals to corresponding power distribution protective device
Instruction, so that corresponding power distribution protective device executes operation corresponding with the manipulation instruction, wherein effective electric data include
Effective three-phase voltage corresponding with the distribution system, effective three-phase current and effective zero-sequence current.
Optionally, in embodiments of the present invention, above-mentioned distribution transformer terminals include main control module and principal communication module；
The main control module and the principal communication module are electrically connected, the principal communication module and at least one described distribution
The communication unit communication of protective device connects, to obtain the effective of the power distribution protective device transmission by the principal communication module
Electric data, and the manipulation instruction sent by the principal communication module to corresponding power distribution protective device.
For method, the embodiment of the present invention provides a kind of power distribution protection method, the distribution above-mentioned applied to any one
Protection system, at least one power distribution protective device the system comprises distribution transformer terminals and with distribution transformer terminals communication connection,
The described method includes:
Three-phase voltage signal, three-phase current signal and the zero-sequence current letter of the power distribution protective device acquisition distribution system
Number, and data processing is carried out to the three-phase voltage signal, the three-phase current signal and the zero sequence current signal, obtain institute
State effective electric data of distribution system；
The power distribution protective device presets obtained effective electric data with the first default electric data threshold and second
Electric data threshold is compared, and is being greater than the described first default electric data threshold or is being less than the described second default electric data threshold
When breaking processing is carried out to the distribution system, wherein the described first default electric data threshold is greater than the described second default electric data
Threshold value；
Obtained effective electric data are sent to the distribution transformer terminals by the power distribution protective device；
The distribution transformer terminals send manipulation instruction to the corresponding power distribution protective device according to effective electric data, with
The power distribution protective device is set to execute corresponding operation according to the manipulation instruction.
Optionally, in embodiments of the present invention, above-mentioned effective electric data include corresponding with the distribution system effective three
Phase voltage, effective three-phase current and effective zero-sequence current,
Described first default electric data threshold include the first default three-phase voltage threshold value, the first default three-phase current threshold value and
First default zero-sequence current threshold value, the described second default electric data threshold are preset including the second default three-phase voltage threshold value, second
Three-phase current threshold value and the second default zero-sequence current threshold value, the power distribution protective device is by obtained effective electric data and the
One default electric data threshold and the second default electric data threshold are compared, and be greater than the described first default electric data threshold or
Carrying out the step of open circuit is handled to the distribution system when less than the described second default electric data threshold includes:
By obtained effective three-phase voltage and the described first default three-phase voltage threshold value and the second default three-phase
Voltage threshold is compared, by obtained effective three-phase current and the described first default three-phase current threshold value and described second
Default three-phase current threshold value is compared, by obtained effective zero-sequence current and the described first default zero-sequence current threshold value and
The second default zero-sequence current threshold value is compared；
At least one in obtained effective three-phase voltage, effective three-phase current and effective zero-sequence current
When the effectively electric data of kind are greater than the corresponding first default electricity data threshold or are less than the corresponding second default electric data threshold, to institute
It states distribution system and carries out breaking processing.
Optionally, in embodiments of the present invention, obtained effective electric data are sent to by above-mentioned power distribution protective device
The step of distribution transformer terminals includes:
To under present data transmission environment wireless communication status and wire communication situation detect；
Automatically the preferable communication pattern of communication conditions in the wireless communication status and the wire communication situation is chosen, and
Obtained effective electric data are sent to the distribution transformer terminals based on the communication pattern of selection, wherein the wireless communication shape
Condition corresponds to wireless communications mode, and the wire communication situation corresponds to wired communication modes.
In terms of existing technologies, power distribution protective device provided in an embodiment of the present invention, system and method have following
The utility model has the advantages that the power distribution protective device can carry out line electrical leakage protection to distribution system, and by wireless communication or wired
Effective electric data of distribution system are sent to other electronic equipments by the mode of communication, are reduced human resources consumption, are easy to implement
The Centralized Monitoring of distribution system and centralized management.The power distribution protective device includes voltage acquisition unit, current acquisition unit, number
According to processing unit, breaking units, control unit and communication unit.The voltage acquisition unit is used to acquire the three-phase of distribution system
Voltage signal, the current acquisition unit are used to acquire the three-phase current signal and zero sequence current signal of the distribution system.Institute
It states data processing unit and the voltage acquisition unit and the current acquisition unit is electrically connected, for collected described
Three-phase voltage signal, the three-phase current signal and the zero sequence current signal carry out data processing, obtain the distribution system
Effective electric data, wherein effective electric data include effective three-phase voltage corresponding with the distribution system, effective three-phase
Electric current and effective zero-sequence current.The breaking units are for regulating and controlling the on-off line state of the distribution system, described control unit
It is electrically connected with the breaking units and the data processing unit, for single according to effective electric data control open circuit
Member regulates and controls the on-off line state of the distribution system.The communication unit and described control unit are electrically connected, and are used for
Effective electric data are sent to it using wired communication modes or wireless communications mode under the control of described control unit
His electronic equipment, so that it is guaranteed that leading in the case that the power distribution protective device can carry out line electrical leakage protection to distribution system
Effective electric data of distribution system are sent to other electronic equipments by the mode for crossing wireless communication or wire communication, reduce manpower money
Source consumption, is easy to implement Centralized Monitoring and the centralized management of distribution system.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, present pre-ferred embodiments are cited below particularly,
And cooperate appended attached drawing, it is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of the claims in the present invention protection scope, for those of ordinary skill in the art, what is do not made the creative labor
Under the premise of, it can also be obtained according to these attached drawings other relevant attached drawings.
Fig. 1 is a kind of block diagram of power distribution protective device provided in an embodiment of the present invention.
Fig. 2 is a kind of block diagram of power distribution protection system provided in an embodiment of the present invention.
Fig. 3 is a kind of block diagram of distribution transformer terminals shown in Fig. 2 provided in an embodiment of the present invention.
Fig. 4 is a kind of flow diagram of power distribution protection method provided in an embodiment of the present invention.
Icon: 100- power distribution protective device；110- voltage acquisition unit；120- current acquisition unit；130- data processing
Unit；140- breaking units；150- control unit；160- communication unit；10- power distribution protection system；200- distribution transformer terminals；210-
Main control module；220- principal communication module.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
With reference to the accompanying drawing, it elaborates to some embodiments of the present invention.In the absence of conflict, following
Feature in embodiment and embodiment can be combined with each other.
Fig. 1 is please referred to, is a kind of block diagram of power distribution protective device 100 provided in an embodiment of the present invention.In this hair
In bright embodiment, the power distribution protective device 100 can to distribution system carry out line electrical leakage protection, and by wireless communication or
Effective electric data of distribution system are sent to other electronic equipments by the mode of wire communication, are reduced human resources consumption, are convenient for
Realize Centralized Monitoring and the centralized management of distribution system.Wherein, the power distribution protective device 100 include voltage acquisition unit 110,
Current acquisition unit 120, data processing unit 130, breaking units 140, control unit 150 and communication unit 160, the distribution
Protective device 100 passes through the voltage acquisition unit 110, the current acquisition unit 120, the data processing unit 130, institute
State the mutual cooperation between breaking units 140, described control unit 150 and the communication unit 160, realize to distribution system into
Row line earth leakage protective, and by wireless communication or effective electric data of distribution system are sent to other by the mode of wire communication
Electronic equipment.
In the present embodiment, the voltage acquisition unit 110 is used to acquire the three-phase voltage signal of distribution system, wherein institute
Stating three-phase voltage signal includes A phase voltage signal, B phase voltage signal and C phase voltage signal.The voltage acquisition unit 110 wraps
Include voltage transformer, the external distribution system of the signal acquisition terminal of the voltage transformer, with three to the distribution system
Phase voltage signal carries out signal acquisition.
In the present embodiment, the current acquisition unit 120 is used to acquire the three-phase flow signal and zero of the distribution system
Sequence current signal, wherein the three-phase voltage signal includes A phase current signal, B phase current signal and C phase current signal.It is described
Current acquisition unit 120 includes the external distribution system of signal acquisition terminal of current transformer, to the distribution system
Three-phase current signal and zero sequence current signal carry out signal acquisition.
In the present embodiment, the data processing unit 130 and the voltage acquisition unit 110 and the current acquisition list
Member 120 is electrically connected, for believing the collected three-phase voltage signal, the three-phase current signal and the zero-sequence current
Number data processing is carried out, effective electric data of the distribution system is obtained, wherein effective electric data include and the distribution
The corresponding effective three-phase voltage of system, effective three-phase current and effective zero-sequence current, effective three-phase voltage include effective A phase
Voltage, effective B phase voltage and effective C phase voltage, effective three-phase current include effective A phase current, effective B phase current and have
Imitate C phase current.Wherein, the acquisition output end for the voltage transformer that the voltage acquisition unit 110 includes and the data processing
Unit 130 connects, to be believed to the data processing unit 130 transmission by the collected three-phase voltage of the voltage transformer
Number；The acquisition output end for the current transformer that the current acquisition unit 120 includes is connect with the data processing unit 130,
To transmit to the data processing unit 130 by the collected three-phase current signal of the current transformer and the zero sequence
Current signal.
In the present embodiment, the data processing unit 130 includes processor, and the data processing unit 130 passes through institute
It states processor and carries out data processing.The processor can be a kind of IC chip of processing capacity with signal.Institute
Stating processor can be general processor, including central processing unit (Central Processing Unit, CPU), network processes
Device (Network Processor, NP) etc..It may be implemented or execute disclosed each method, the step in the embodiment of the present invention
And logic diagram.General processor can be microprocessor or the processor is also possible to any conventional processor etc..
In the present embodiment, the breaking units 140 are for regulating and controlling the on-off line state of the distribution system.The open circuit
Unit 140 includes breaker, and the breaker is linked into the route of the distribution system, and the breaking units 140 pass through institute
Stating breaker ensures that the distribution system is in channel status or off state.Wherein the breaker will make described in tripping
The line broken circuit of distribution system, to ensure that the distribution system is in off state；The breaker will make described when closing a floodgate
The route of distribution system is closed, to ensure that the distribution system is in channel status.
In the present embodiment, 130 electricity of described control unit 150 and the breaking units 140 and the data processing unit
Property connection, for controlling the breaking units 140 to the distribution system according to the corresponding effective electric data of the distribution system
On-off line state regulated and controled.Wherein described control unit 150 includes controller, and described control unit 150 passes through the control
Device processed realizes the control to the breaking units 140.
In the present embodiment, the communication unit 160 is electrically connected with described control unit 150, in the control
It uses wired communication modes or wireless communications mode that effective electric data are sent to other electronics under the control of unit 150 to set
It is standby.Wherein, effective electric data that the communication unit 160 is sent to other electronic equipments can be the breaking units 140 and adjust
Effective electric data when controlling the distribution network systems open circuit, be also possible under normal conditions to the three-phase voltage signal of distribution network systems,
Three-phase current signal and zero sequence current signal obtained effective electric data when being acquired.
In the present embodiment, the communication unit 160 includes carrier wave wireless dual mode communication module, the communication unit 160
Carried out data transmission by the carrier wave wireless dual mode communication module using wired communication modes or wireless communications mode.
It referring to figure 2., is a kind of block diagram of power distribution protection system 10 provided in an embodiment of the present invention.In the present invention
In embodiment, the power distribution protection system 10 include distribution transformer terminals 200 and with the distribution transformer terminals 200 communication connection at least one
A power distribution protective device 100.The power distribution protective device 100 mode or wired communication modes and the distribution transforming by wireless communication
Terminal 200 communicates to connect, and effective electric data of the distribution system for obtaining the power distribution protective device 100 are sent to described
Distribution transformer terminals 200 assign manipulation instruction from the distribution transformer terminals 200 to corresponding power distribution protective device 100, so that corresponding distribution is protected
Protection unit 100 executes operation corresponding with the manipulation instruction.
Wherein, effective electric data include effective three-phase voltage corresponding with the distribution system, effective three-phase current
And effective zero-sequence current, effective electric data that the power distribution protective device 100 is sent to the distribution transformer terminals 200 can be
Effective electric data when the responsible distribution system of the power distribution protective device 100 is by 100 open circuit protection of power distribution protective device,
It can be effective electric data that the responsible distribution system of the power distribution protective device 100 is run under normal conditions.The manipulation instruction
The breaking units 140 that can be the corresponding power distribution protective device 100 of control carry out breaking processing or access processing, are also possible to control
Corresponding power distribution protective device 100 is out of service or starting is run.
It referring to figure 3., is a kind of block diagram of distribution transformer terminals shown in Fig. 2 200 provided in an embodiment of the present invention.
In embodiments of the present invention, the distribution transformer terminals 200 include main control module 210 and principal communication module 220.The main control module
210 for assigning manipulation instruction, the principal communication to each power distribution protective device 100 communicated to connect with the distribution transformer terminals 200
Module 220 is used for the communication connection established between the distribution transformer terminals 200 and each power distribution protective device 100.
In the present embodiment, the main control module 210 is electrically connected with the principal communication module 220, the principal communication mould
The communication unit 160 of block 220 and at least one power distribution protective device 100 communicates to connect, to pass through the principal communication module
220 obtain effective electric data that the power distribution protective devices 100 are sent, and by the principal communication module 220 to correspondence distribution
The manipulation instruction that protective device 100 is sent realizes the Centralized Monitoring to distribution system and centralized management.
It referring to figure 4., is a kind of flow diagram of power distribution protection method provided in an embodiment of the present invention.Of the invention real
It applies in example, the power distribution protection method is applied to power distribution protection system 10 shown in Fig. 2, and the power distribution protection system 10 includes
Distribution transformer terminals 200 and at least one power distribution protective device 100 communicated to connect with the distribution transformer terminals 200.Below to shown in Fig. 4
Power distribution protection method detailed process and step be described in detail.
Step S310, power distribution protective device 100 acquire three-phase voltage signal, three-phase current signal and the zero sequence of distribution system
Current signal, and data processing is carried out to the three-phase voltage signal, the three-phase current signal and the zero sequence current signal,
Obtain effective electric data of the distribution system.
In the present embodiment, the power distribution protective device 100 passes through the voltage acquisition unit 110 and current acquisition list of itself
Member 120 acquires three-phase voltage signal, three-phase current signal and the zero-sequence current of the responsible distribution system of the power distribution protective device 100
Signal, and by the data processing unit 130 of the power distribution protective device 100 to the collected three-phase voltage signal, described
Three-phase current signal and the zero sequence current signal carry out data processing, obtain effective electric data of the distribution system.
Obtained effective electric data are preset electric data threshold with first by step S320, the power distribution protective device 100
Value and the second default electricity data threshold are compared, and are being greater than the described first default electric data threshold or are being less than described second in advance
If carrying out breaking processing to the distribution system when electric data threshold.
In the present embodiment, effective electric data include effective three-phase voltage corresponding with the distribution system, effectively
Three-phase current and effective zero-sequence current, the described first default electric data threshold includes the first default three-phase voltage threshold value, first pre-
If three-phase current threshold value and the first default zero-sequence current threshold value, the described second default electric data threshold includes the second default three-phase electricity
Press threshold value, the second default three-phase current threshold value and the second default zero-sequence current threshold value.Wherein the described first default electric data threshold
In each default electric data threshold be greater than each corresponding default electric data threshold in described second default electric data threshold, i.e.,
The first default three-phase voltage threshold value is greater than the described second default three-phase voltage threshold value, the first default three-phase current threshold value
Greater than the described second default three-phase current threshold value, the first default zero-sequence current threshold value is greater than the described second default zero-sequence current
Threshold value.The power distribution protective device 100 presets obtained effective electric data with the first default electric data threshold and second
Electric data threshold is compared, and is being greater than the described first default electric data threshold or is being less than the described second default electric data threshold
When to the distribution system carry out open circuit processing the step of include:
By obtained effective three-phase voltage and the described first default three-phase voltage threshold value and the second default three-phase
Voltage threshold is compared, by obtained effective three-phase current and the described first default three-phase current threshold value and described second
Default three-phase current threshold value is compared, by obtained effective zero-sequence current and the described first default zero-sequence current threshold value and
The second default zero-sequence current threshold value is compared；
At least one in obtained effective three-phase voltage, effective three-phase current and effective zero-sequence current
When the effectively electric data of kind are greater than the corresponding first default electricity data threshold or are less than the corresponding second default electric data threshold, to institute
It states distribution system and carries out breaking processing.
Wherein, effective three-phase voltage includes effective A phase voltage, effective B phase voltage and effective C phase voltage, then corresponds to
The described first default three-phase voltage threshold value include that the first default A phase voltage threshold value, the first default B phase voltage threshold value and first are pre-
If C phase voltage threshold value, the second default three-phase voltage threshold value includes the second default A phase voltage threshold value, the second default B phase voltage
Threshold value and the second default C phase voltage threshold value.The power distribution protective device 100 by by effective A phase voltage, effective B phase voltage and
Effective C phase voltage respectively with the first default A phase voltage threshold value, the first default B phase voltage threshold value and the first default C phase voltage threshold value
Be compared, and respectively with the second default A phase voltage threshold value, the second default B phase voltage threshold value and the second default C phase voltage threshold value
It is compared.When there are at least one effective single-phase voltages in effective A phase voltage, effective B phase voltage and effective C phase voltage
Greater than corresponding first default single-phase voltage threshold value (including the first default A phase voltage threshold value, the first default B phase voltage threshold value or
First default C phase voltage threshold value) when, the effective three-phase voltage determined is greater than the corresponding first default three-phase electricity
Press threshold value.When there are at least one effective single-phase voltage is small in effective A phase voltage, effective B phase voltage and effective C phase voltage
In corresponding second default single-phase voltage threshold value (including the second default A phase voltage threshold value, the second default B phase voltage threshold value or
Two default C phase voltage threshold values) when, the effective three-phase voltage determined is less than the corresponding second default three-phase voltage
Threshold value.
Similarly, effective three-phase current includes effective A phase current, effective B phase current and effective C phase current, then right
The default three-phase current threshold value of described first answered includes the first default A phase current threshold value, the first default B phase current threshold value and first
Default C phase current threshold value, the second default three-phase current threshold value include the second default A phase current threshold value, the second default B phase electricity
Flow threshold value and the second default C phase current threshold value.The power distribution protective device 100 is by by effective A phase current, effective B phase current
And effectively C phase current respectively with the first default A phase current threshold value, the first default B phase current threshold value and the first default C phase current threshold
Value is compared, and respectively with the second default A phase current threshold value, the second default B phase current threshold value and the second default C phase current threshold
Value is compared.When there are at least one effective single-phase electricities in effective A phase current, effective B phase current and effective C phase current
Stream is greater than corresponding first default monophase current threshold value (including the first default A phase current threshold value, the first default B phase current threshold value
Or the first default C phase current threshold value) when, the effective three-phase current determined is greater than the corresponding first default three-phase
Current threshold.When there are at least one effective monophase currents in effective A phase current, effective B phase current and effective C phase current
Less than corresponding second default monophase current threshold value (including the second default A phase current threshold value, the second default B phase current threshold value or
Second default C phase current threshold value) when, the effective three-phase current determined is less than the corresponding second default three-phase electricity
Flow threshold value.
Similarly, the power distribution protective device 100 by by effective zero-sequence current and the first default zero-sequence current threshold value into
Row compares, and is compared with the described second default zero-sequence current threshold value.When effective zero-sequence current is greater than corresponding first
When default zero-sequence current threshold value, the effective zero-sequence current determined is greater than the corresponding first default zero-sequence current threshold
Value.When effective zero-sequence current is less than corresponding second default zero-sequence current threshold value, effective zero sequence for determining
Electric current is less than the corresponding second default zero-sequence current threshold value.
Obtained effective electric data are sent to distribution transformer terminals 200 by step S330, the power distribution protective device 100.
In the present embodiment, effective electric data that the power distribution protective device 100 is sent to the distribution transformer terminals 200 can be with
Be the responsible distribution system of the power distribution protective device 100 by 100 open circuit protection of power distribution protective device when effective electric data,
It is also possible to effective electric data that the responsible distribution system of the power distribution protective device 100 is run under normal conditions.Wherein, described to match
The step of obtained effective electric data are sent to distribution transformer terminals 200 by electrical protective device 100 include:
To under present data transmission environment wireless communication status and wire communication situation detect；
It chooses wireless communications mode automatically according to testing result and preferably communicates mould with communication conditions in wired communication modes
Formula, and obtained effective electric data are sent to by the distribution transformer terminals 200 based on the communication pattern of selection, wherein the nothing
Line communication conditions correspond to wireless communications mode, and the wire communication situation corresponds to wired communication modes, to realize the distribution transforming
Centralized Monitoring of the terminal 200 to each distribution system.
Step S340, the distribution transformer terminals 200 are according to effective electric data to the corresponding power distribution protective device 100
Manipulation instruction is sent, so that the power distribution protective device 100 executes corresponding operation according to the manipulation instruction.
In the present embodiment, the distribution transformer terminals 200 can be filled according to the effective electric data got to corresponding power distribution protection
It sets 100 and assigns manipulation instruction, to control the distribution system that the power distribution protective device 100 is responsible for the power distribution protective device 100
It is managed concentratedly.
In conclusion in power distribution protective device provided in an embodiment of the present invention, system and method, the power distribution protection dress
Line electrical leakage protection can be carried out to distribution system by setting, and by wireless communication or the mode of wire communication having distribution system
It imitates electric data and is sent to other electronic equipments, reduce human resources consumption, be easy to implement the Centralized Monitoring and concentration of distribution system
Management.The power distribution protective device includes voltage acquisition unit, current acquisition unit, data processing unit, breaking units, control
Unit and communication unit.The voltage acquisition unit is used to acquire the three-phase voltage signal of distribution system, the current acquisition list
Member is for acquiring the three-phase current signal and zero sequence current signal of the distribution system.The data processing unit and the voltage
Acquisition unit and the current acquisition unit are electrically connected, for the collected three-phase voltage signal, the three-phase electricity
It flows signal and the zero sequence current signal carries out data processing, effective electric data of the distribution system are obtained, wherein described have
Imitating electric data includes effective three-phase voltage corresponding with the distribution system, effective three-phase current and effective zero-sequence current.It is described
Breaking units are for regulating and controlling the on-off line state of the distribution system, described control unit and the breaking units and the data
Processing unit is electrically connected, for controlling the breaking units to the on-off road of the distribution system according to effective electric data
State is regulated and controled.The communication unit and described control unit are electrically connected, for adopting under the control of described control unit
Effective electric data are sent to other electronic equipments with wired communication modes or wireless communications mode, so that it is guaranteed that described match
In the case that electrical protective device can carry out line electrical leakage protection to distribution system, by wireless communication or the mode of wire communication
Effective electric data of distribution system are sent to other electronic equipments, human resources consumption is reduced, is easy to implement distribution system
Centralized Monitoring and centralized management.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of power distribution protective device, which is characterized in that described device includes:
For acquiring the voltage acquisition unit of the three-phase voltage signal of distribution system；
For acquiring the three-phase current signal of the distribution system and the current acquisition unit of zero sequence current signal；
It is electrically connected with the voltage acquisition unit and the current acquisition unit, for the collected three-phase voltage
Signal, the three-phase current signal and the zero sequence current signal carry out data processing, obtain effective electricity of the distribution system
The data processing unit of data, wherein effective electric data include effective three-phase voltage corresponding with the distribution system, have
Imitate three-phase current and effective zero-sequence current；
For regulating and controlling the breaking units of the on-off line state of the distribution system；
It is electrically connected with the breaking units and the data processing unit, for described disconnected according to effective electric data control
The control unit that road unit regulates and controls the on-off line state of the distribution system；And
It is electrically connected with described control unit, for using wired communication modes or channel radio under the control of described control unit
Effective electric data are sent to the communication unit of other electronic equipments by letter mode.
2. the apparatus according to claim 1, which is characterized in that the voltage acquisition unit includes voltage transformer；
The external distribution system of the signal acquisition terminal of the voltage transformer, with the three-phase voltage signal to the distribution system
Carry out signal acquisition；
The acquisition output end of the voltage transformer is connect with the data processing unit, to transmit to the data processing unit
By the collected three-phase voltage signal of the voltage transformer.
3. the apparatus according to claim 1, which is characterized in that the current acquisition unit includes current transformer；
The external distribution system of the signal acquisition terminal of the current transformer, with the three-phase current signal to the distribution system
And zero sequence current signal carries out signal acquisition；
The acquisition output end of the current transformer is connect with the data processing unit, to transmit to the data processing unit
By the collected three-phase current signal of the current transformer and the zero sequence current signal.
4. the apparatus according to claim 1, which is characterized in that the breaking units include breaker, and the breaker connects
Enter into the route of the distribution system, the breaking units ensure that the distribution system is in access shape by the breaker
State or off state.
5. device described in any one of -4 according to claim 1, which is characterized in that the communication unit includes carrier wave wireless
Dual mode communication module, the communication unit use wired communication modes or channel radio by the carrier wave wireless dual mode communication module
Letter mode carries out data transmission.
6. a kind of power distribution protection system, which is characterized in that the system comprises in distribution transformer terminals and at least one claim 1-5
Power distribution protective device described in any one；
The power distribution protective device and the distribution transformer terminals communicate to connect, the power distribution system for obtaining the power distribution protective device
Effective electric data of system are sent to the distribution transformer terminals, assign manipulation to corresponding power distribution protective device from the distribution transformer terminals and refer to
Enable so that corresponding power distribution protective device executes operation corresponding with the manipulation instruction, wherein effective electricity data include with
The corresponding effective three-phase voltage of the distribution system, effective three-phase current and effective zero-sequence current.
7. system according to claim 6, which is characterized in that the distribution transformer terminals include main control module and principal communication mould
Block；
The main control module and the principal communication module are electrically connected, the principal communication module and at least one described power distribution protection
The communication unit communication of device connects, to obtain effective electric number that the power distribution protective device is sent by the principal communication module
According to, and the manipulation instruction sent by the principal communication module to corresponding power distribution protective device.
8. a kind of power distribution protection method, which is characterized in that applied to power distribution protection system described in claim 6 or 7, the system
System includes distribution transformer terminals and at least one power distribution protective device with distribution transformer terminals communication connection, which comprises
Three-phase voltage signal, three-phase current signal and the zero sequence current signal of the power distribution protective device acquisition distribution system, and
Data processing is carried out to the three-phase voltage signal, the three-phase current signal and the zero sequence current signal, obtains described match
Effective electric data of electric system；
Obtained effective electric data are preset electric number with the first default electric data threshold and second by the power distribution protective device
It is compared according to threshold value, and when being greater than the described first default electric data threshold or being less than the described second default electric data threshold pair
The distribution system carries out breaking processing, wherein the described first default electric data threshold is greater than the described second default electric data threshold
Value；
Obtained effective electric data are sent to the distribution transformer terminals by the power distribution protective device；
The distribution transformer terminals send manipulation instruction to the corresponding power distribution protective device according to effective electric data, so that institute
It states power distribution protective device and executes corresponding operation according to the manipulation instruction.
9. according to the method described in claim 8, it is characterized in that, effective electric data include corresponding with the distribution system
Effective three-phase voltage, effective three-phase current and effective zero-sequence current, the described first default electric data threshold includes first default
Three-phase voltage threshold value, the first default three-phase current threshold value and the first default zero-sequence current threshold value, the described second default electric data threshold
Value includes the second default three-phase voltage threshold value, the second default three-phase current threshold value and the second default zero-sequence current threshold value, described to match
Electrical protective device carries out obtained effective electric data with the first default electric data threshold and the second default electric data threshold
Compare, and when being greater than the described first default electric data threshold or being less than the described second default electric data threshold to the power distribution system
System carry out open circuit processing the step of include:
By obtained effective three-phase voltage and the described first default three-phase voltage threshold value and the second default three-phase voltage
Threshold value is compared, and obtained effective three-phase current and the described first default three-phase current threshold value and described second are preset
Three-phase current threshold value is compared, by obtained effective zero-sequence current and the described first default zero-sequence current threshold value and described
Second default zero-sequence current threshold value is compared；
When obtained at least one of effective three-phase voltage, effective three-phase current and effective zero-sequence current have
When imitating electric data electric data threshold default greater than corresponding first or being less than the corresponding second default electricity data threshold, match to described
Electric system carries out breaking processing.
10. according to the method described in claim 9, it is characterized in that, effective electricity that the power distribution protective device will obtain
Data are sent to the step of distribution transformer terminals and include:
To under present data transmission environment wireless communication status and wire communication situation detect；
Choose the preferable communication pattern of communication conditions in wireless communications mode and wired communication modes automatically according to testing result, and
Obtained effective electric data are sent to the distribution transformer terminals based on the communication pattern of selection, wherein the wireless communication shape
Condition corresponds to wireless communications mode, and the wire communication situation corresponds to wired communication modes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810812711.7A CN108963985A (en) | 2018-07-23 | 2018-07-23 | Power distribution protective device, system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810812711.7A CN108963985A (en) | 2018-07-23 | 2018-07-23 | Power distribution protective device, system and method |
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| CN108963985A true CN108963985A (en) | 2018-12-07 |
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| CN201810812711.7A Pending CN108963985A (en) | 2018-07-23 | 2018-07-23 | Power distribution protective device, system and method |
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