Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
  • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
  • H02H3/02—Details
  • H02H3/06—Details with automatic reconnection
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
  • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
  • H02H3/02—Details
  • H02H3/06—Details with automatic reconnection
  • H02H3/063—Details concerning the co-operation of many similar arrangements, e.g. in a network
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
  • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
  • H02H3/02—Details
  • H02H3/06—Details with automatic reconnection
  • H02H3/07—Details with automatic reconnection and with permanent disconnection after a predetermined number of reconnection cycles
• • 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
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
  • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
  • H02H3/006—Calibration or setting of parameters

Definitions

• the invention relates to a reclosing system for modular circuit breakers as well as a recloser used in this system and a method for implementing this system.
• Such a reclosing system for modular circuit breakers is generally composed of different modules responsible for managing the switching on and / or tripping of modular circuit breakers.
• a recloser is responsible for monitoring the presence or absence of voltage downstream of a circuit breaker. If the voltage is absent, it can be assumed that the circuit breaker is open or has just opened, the recloser must then react.
• Systems are known comprising from one to several circuit breakers per box or recloser dependent on one another and managed by a conventional integrated circuit.
• circuit breakers In the telecommunications sector, for example, there are usually four elements supplied and protected by a circuit breaker. In other areas, such as industry, the number of circuit breakers may be greater.
• the type of fault, permanent or fugitive is determined by measuring the closing time of the circuit breaker or by external information from an additional detector.
• the aim of the present invention is to propose a reclosing system for a modular circuit breaker as well as a corresponding recloser and a method for implementing such a system, in which the circuit breakers can be managed intelligently and independently of each other. others.
• This system and the method should also allow an opening towards individual and specific applications.
• the reclosing system of modular circuit breakers comprising a main recloser and at least one secondary recloser, each main or secondary recloser monitoring the presence or absence of voltage downstream of at least one circuit breaker module assigned to it and ensuring the triggering and reclosing of the latter.
• the main recloser and the secondary reclosers are each provided with at least one programmable microcontroller and are interconnected by a link bus.
• the main recloser and the secondary reclosers each comprise at at least one reclosing module per modular circuit breaker to be managed, and each reclosing module is provided with a microcontroller and a memory for storing parameters.
• the parameters stored in the memory of each reclosing module are parameters common to all the modular circuit breakers and / or specific parameters for each modular circuit breaker.
• the main recloser is preferably provided with a man / machine interface for exchanging data with the user.
• the main recloser interacts with all the reclosing modules of the secondary reclosers via the bus and sends them the specific parameters for each secondary recloser.
• each secondary recloser is identified by a specific number.
• a recloser for modular circuit breakers monitoring the presence or absence of voltage downstream of at least one modular circuit breaker assigned to it, and ensuring the management of the tripping and reclosing of the latter, is provided with a programmable microcontroller.
• the recloser according to the invention advantageously comprises at least one reclosing module per modular circuit breaker to be managed, and each reclosing module is provided with a microcontroller and a memory for storing parameters.
• the recloser according to the invention is provided with a bus interface so that it can be connected to a communication bus for the exchange of data with other reclosers and / or any local or remote management system.
• These systems could be, for example, a microcomputer, programmable logic controller, Centralized Technical Management ...
• the method for managing the reset of a modular circuit breaker using a reset module comprises the following steps: the presence or absence of voltage downstream of the circuit breaker is monitored; in the event of absence of tension, one launches a delay of resetting delay; after the reset delay time has elapsed, the circuit breaker is reset and an inter-reset delay is started.
• the delay times for reclosing and inter-reclosing are individually adjustable for each reclosing and each modular circuit breaker.
• the delay times for reclosing and inter-reclosing are individually adjustable for each reclosing and for each modular circuit breaker from a few seconds to several hours.
• an authorized number of resets is adjustable for each type of fault.
• a sector absence delay is calculated which is the delay to be observed before the circuit breaker is reset following a disappearance and a reappearance of the upstream sector as a function of the module to which the circuit breaker concerned belongs.
• the reclosing is blocked in the event of a permanent fault, or if the number of authorized reclosings is reached.
• a reset time delay is applied if the number of authorized resets is not yet reached, making it possible to reset the number of resets already recorded.
• This reset delay is preferably independent of the reset delay delay.
• the sector presence time is counted by adding it to the previous one until reaching the reset time delay.
• the reset time is from a few seconds to several hours.
• the recloser does not take into account any order to close a circuit breaker from a remote control or from the protocol on the bus if the recloser has previously determined that it was necessary to block this circuit breaker due to permanent fault detection. This has the advantage of ensuring the security of the installation.
• Figure 1 shows an example of an electrical diagram of the connection of a reclosing system for modular circuit breakers.
• FIG. 2 shows the interconnection of the various modules of the reclosing system according to the invention.
• Figure 3 shows the structure of the main recloser according to the invention.
• Figure 4 shows the structure of a secondary recloser according to the invention.
• FIG. 5 shows the diagram of a reset module according to the invention.
• Figure 6 shows a block diagram of the reclosing.
• Figure 7 shows the diagram of a process for the system of the invention.
• FIG. 8 shows a reset delay according to the invention.
• Figure 1 shows an example of an electrical diagram of the connection of a reset system.
• this diagram shows a circuit breaker main, generally non-differential, which distributes the energy supplied from the electrical network to secondary circuit breakers 4 which are, for example, of differential and motorized type.
• the main circuit breaker is itself modular and can also be motorized and controlled by a recloser.
• Read input in Figure 1
• Cde output in Figure 1 by motor M.
• FIG. 1 only four elements supplied and protected by circuit breakers (air conditioning, energy workshop, radio bay, auxiliary) are shown, because this example shows one of the most common applications in the telecommunications field.
• a reclosing system 1 for modular circuit breaker according to the invention comprises the various modules (not shown) responsible for managing the switching on and / or tripping of secondary circuit breakers 4.
• These modular secondary circuit breakers can, for example, be type circuit breakers C60 from the company Merlin et Gérin. They can be bi, tri or four-pole, with or without a differential device.
• circuit breakers 4 In the example according to FIG. 1, only four circuit breakers 4 are shown, but in other fields such as industry, the number of secondary circuit breakers 4 may be greater.
• the reset system 1 is a so-called "battery-free" system.
• the modular circuit breakers 4 are in second position in the electrical diagrams, the energy, making it possible to supply the system and the motorized remote controls for the circuit breakers, is taken upstream of the monitored circuit breaker (s) (the power supply 9 in FIG. 1) . It should be noted that this upstream therefore corresponds to the downstream of the main circuit breaker.
• FIG. 2 shows a preferred embodiment of interconnection of the reclosing system 1 for modular circuit breakers according to the invention.
• a such a system includes one or more reclosers, main 2 and secondary 3, monitoring the presence or absence of voltage downstream of at least one modular circuit breaker 4 assigned to it, and ensuring the tripping and reclosing of the latter .
• the main recloser 2 is connected by a bus 5 which can be a standard or specific bus, to several secondary reclosers 3.
• Another link via a bus-PC interface 6 is provided for dialogue with a standard computer 7
• This interface could also be a bus-PLC, bus-BMS interface, etc., depending on the connected peripheral units.
• Each main 2 or secondary 3 recloser manages two circuit breakers 4. This number of circuit breakers 4 per recloser 2, 3 is not limiting and can vary from one to several circuit breakers 4.
• the reclosing system 1 for circuit breakers modular could include only one main recloser 2 if this is sufficient.
• FIG. 3 shows the general architecture of the main recloser 2.
• the main recloser 2 comprises two reclosing modules A, B each managing a circuit breaker 4.
• the number of two modules A, B is not limiting but depends on the number of circuit breakers to be managed.
• a reset module is provided by circuit breaker.
• Each module A, B has an input ("Downstream Sector") for monitoring the downstream sector and an output to the associated circuit breaker 4 for controlling the motorization thereof.
• Downstream Sector an input
• two indicator lights 10, 11 are linked to each reset module A, B indicating the presence of the downstream sector or of a downstream alarm.
• each circuit breaker 4 monitored has its own information indicators.
• these indicators could be replaced by an LCD display, for example, or any other suitable display.
• the display of information on the state of the monitored circuit breaker 4 can also be carried out on a computer connected to the reset circuit 1 or on other appropriate peripheral units.
• a "Test" input and a "Downstream Alarm” output, described in more detail below, are also provided.
• a man / machine interface (HMI) 8 allows the exchange of information with the user.
• This man / machine interface 8 can consist of a keyboard and displays or a screen, for example.
• a remote control interface enables reception of Decl triggering commands, Recl reclosing and Vere locking commands (Prohibition of reclosing).
• the main recloser 2 has its own central unit (a microcontroller) with a memory, an EEPROM memory for example, and must manage the memorization of parameters, management of the keyboard and display of information, communication via the link bus 5 between the different units, issuing alarms, managing circuit breakers 4 managed by reclosing modules A, B (reading information downstream of circuit breakers, controlling circuit breakers, etc.) as well as taking into account any remote controls.
• a microcontroller with a memory, an EEPROM memory for example, and must manage the memorization of parameters, management of the keyboard and display of information, communication via the link bus 5 between the different units, issuing alarms, managing circuit breakers 4 managed by reclosing modules A, B (reading information downstream of circuit breakers, controlling circuit breakers, etc.) as well as taking into account any remote controls.
• the reclosing modules A, B and the man / machine interface 8 are connected to the link bus 5.
• FIG. 4 shows the architecture of a secondary recloser 3.
• the architecture of the secondary reclosers 3 is mainly the same as that of the main recloser 2 with the exception of the man / machine interface which is not provided for in the secondary reclosers 3.
• a power supply 9 in each secondary recloser 3 of the reclosing modules A, B, a power supply 9, a link bus 5, as well as warning lights and downstream sector presence 10, 11.
• Each secondary recloser 3 is identified by a specific and easily modifiable number.
• the secondary reclosers 3 are managed by microcontrollers 14 (see the description in more detail with respect to FIG. 5) in each reclosing module A, B whose input / output capacity is adapted to the desired use. It is not mandatory that the microcontrollers 14 of the secondary reclosers 3 be of the same type as the central unit of the main recloser 2.
• Each secondary recloser 3 already has a default setting stored in a memory, for example an EEPROM memory, but also receives modified parameters from main recloser 2 via link bus 5.
• the data is therefore not sent by the central unit of the main recloser 2 to the secondary reclosers 3 because their own memory allows their independence. .
• the data could be stored by the main recloser 2 and sent to the secondary reclosers 3 on return from the sector.
• the secondary reclosers 3 must therefore manage the coding of the module number A, B, the memorization of the parameters, the communication by the link bus 5, as well as the management of the circuit breakers 4 connected to the reclosing modules A, B.
• the coding of the number of modules A, B can be done using a coding wheel, for example.
• the main recloser 2 interacts with all the reclosing modules A, B of the different secondary reclosers 3 via the link bus 5, for example a standard bus. All the commands intended for controlling the reclosing modules A, B pass through this link bus 5. These commands are issued by the main recloser 2, by a microcomputer equipped with the corresponding control software and responsible for supervising the system or by all other appropriate means.
• FIG. 5 shows in more detail the architecture of a reclosing module A, B as found in the main recloser 2 and the secondary reclosers 3.
• the reclosing module A, B is a functional subset used in the main recloser 2 and the secondary reclosers 3.
• This reclosing module A, B includes a bus interface 12 for the connection to the bus 5 and allowing the reception of the commands coming from the main recloser 2 for the secondary reclosers 3 and a system of supervision possibly provided for the main recloser 2.
• the resetting modules A, B also include an input / output interface 18 for a "test" input and a "downstream alarm” output, a signaling interface 15, a circuit breaker control interface 17, as well as a detection interface presence of downstream sector 16. Setting the 0 volt potential of the "test” input triggers the test function of the reset module, that is to say the same action as the reset command.
• the "downstream alarm” output serves as a downstream alarm indicator.
• the signaling interface 15 is connected to the indicators 10, 11 of mains presence and downstream alarm.
• An "MR Address” input allows selection of the address of the reclosing module A, B. This input is preferably a 5-bit input and the address is between 0 and 31.
• a microcontroller 14 and a memory 13 which may be a memory of the EEPROM type ensures the management of the reset module.
• the microcontroller 14 is a standard microcontroller and manages the circuit breakers 4. The various parameters used for the management of the circuit breakers 4 are stored in the EEPROM memory 13.
• FIG. 6 shows the general flowchart of the operation of such a reclosing system. Following the arrival of an electrical problem causing the circuit breaker, the relevant secondary circuit breaker 4 opens. The corresponding recloser then delays for a predetermined reclosing delay delay Trr and then sends the closing order to the motorisation of the circuit breaker 4.
• the circuit breaker reopens after this predetermined closing time period, the fault is declared a so-called fugitive fault and a new attempt to reset may take place.
• the number of successive resets is limited to a predetermined number.
• the time period of predetermined closure or the delay time can be, for example, 2 seconds and the number of resets allowed Nbra can be equal to 3.
• the closing of the circuit breaker can be forced except in the case where the circuit breaker is blocked following a permanent fault detection.
• the motor element of the relaunching modules A, B is an automaton implemented by the microcontroller.
• FIG. 7 shows an example of the process carried out according to the invention.
• the PLC has nine stable states (“OUT OF SERVICE”, “OUT OF SERVICE PERMANENT”, “LOCKING”, “PERMANENT STOP”, “STOP”, “ON”, “FUGITIVE FAULT”, “PERMANENT FAULT” and “MONITORED ON” ).
• the PLC is in the "OFF" state, unless the PLC was in the OUT OF SERVICE state before the disappearance of the upstream sector, in which case it will remain in the OUT OF SERVICE state, unless the controller was in the PERMANENT OUT OF SERVICE state before the disappearance of the upstream sector, in which case it will remain in the PERMANENT OUT OF SERVICE state, and unless the the controller was in the PERMANENT STOP state before the disappearance of the upstream sector, in which case it will remain in the PERMANENT STOP state.
• the PLC goes to the ON state.
• the controller enters the OUT OF SERVICE state.
• This maneuver is authorized a number of times less than or equal to Nbradp, after which the PLC goes into PERMANENT STOP state.
• the PLC goes to STOP state. - If a deactivation command occurs, the PLC goes to the PERMANENT OUT OF SERVICE state. Being in the PERMANENT OUT OF SERVICE state:
• the PLC returns to the PERMANENT STOP state.
• a loss of the downstream voltage occurs within a period of less than a predetermined period of time, 2 seconds for example, of the presence of the PLC in the ON MONITORED state, then it goes to the PERMANENT FAULT state.
• a loss of the downstream voltage occurs within a delay greater than or equal to a predetermined period of time, 2 seconds for example, of the presence of the PLC in the ON SURVEILLED state, then it goes to the DEFECT state FUGITIVE.
• a trip command occurs after the trip, the PLC goes to the FUGITIVE FAULT state.
• the parameters common to all the reclosing modules 3 are the Taav downstream alarm delay, the type of electrical locking Vere with or without tripping, the single delay option Ompt, the delay to be observed in the event of a power cut and reappearance (Tabs sector absence delay), as well as the delay which allows the number of recloses counted to be reset to zero (Traz reset delay).
• Taav When an alarm appears following a blocking, the opening of the downstream alarm relay will only take place after the Taav downstream alarm delay. In the case of an upstream alarm, there will be no time delay because it will appear following a mains absence and it will therefore be impossible to power the reset module.
• a downstream alarm delay Taav therefore indicates the delay until the activation of the downstream alarm output.
• the minimum value of Taav is 1 second and its maximum value is 17 hours with an increment of 1 second and a default value of 1 second.
• the essential function of Vere electric locking also called "Reclosing prohibition" is to prohibit all reclosings whatever their origin, automatic, remote-controlled or test.
• the single delay option allows you to define if the system will use a single identical delay for all trips of the monitored circuit breaker 4 or if each of the delays for the same circuit breaker 4 may be different.
• the "normal" operation of the reclosing system respects the delay delay for reclosing Trr (see below), but in the event that there is an absence from the sector, another delay, the absence delay Tabs sector is used.
• the main recloser 2 is not considered as the reclosing module N ° 1, but the module N ° 1 is the first extension of the system or the first secondary recloser 3.
• the minimum value of Ftabs is 2 seconds and its maximum value is 255 seconds with an increment of 1 second and a default value of 2 seconds.
• the reclosing time delays on fugitive fault Trdf are the time delays to be observed before resetting the circuit breaker following the appearance of a fugitive fault.
• the TRDF are preferably 10 in number and are used in turn of the era to the 10th. According to a preferred example of the invention, the minimum value of Trdf is 2 seconds and its maximum value is 17 hours with an increment of 1 second and a default value of 2 seconds.
• Reclosing time delays on permanent fault Trdp are the times to be observed before resetting the circuit breaker following the appearance of a permanent fault.
• the TRDP are preferably also 10 in number and are used in turn of the era to the 10th.
• the minimum value of Trdp is 2 seconds and its maximum value is 17 hours with an increment of 1 second and a default value of 2 seconds.
• the downstream sector presence times are counted. If the sum of these times is greater than or equal to a Traz reset delay, the delay cycle is reset.
• the minimum value of Traz is 30 seconds and its maximum value is 1 hour with an increment of 1 second and a default value of 30 seconds.
• FIG. 8 shows the diagram of the Traz reset time delay programmable according to the invention.
• the system In normal case, when the number of authorized reclosings Nbra is reached the system must hang. However, this number can be quickly reached if triggers on fugitive defect appear very often.
• a time delay is provided which allows the number already counted to be reset to zero. This time delay is unique for all circuit breakers and may, for example, take a value from 30 seconds to 30 minutes. In the example in Figure 8, the default is 160 seconds.
• the delay is active only when the sector is present downstream of the circuit breaker. That is to say, it is independent of the programmed delay time Trr.
• the system After each return to the mains, the system counts the time by adding it to the previous one until reaching the Traz reset time delay (160 seconds in the example). If the number of reclosings authorized Nbra plus a trip is reached before having accumulated the equivalent of the delay at zero Traz, the reset will not be executed.
• the times taken into account are only those of the presence of the sector downstream of the circuit breaker and do not take into account the programmed delay time which may very well be longer (in the example from 2 seconds to 99 hours) .
• each circuit breaker 4 The parameters specific to each circuit breaker 4 are the delay in reclosing of the first circuit breaker (delay reclosing delay Trr), delays in reclosing each of the following circuit breakers (inter reclosing delay Tir) and the number of authorized reclosings Nbra (Nbradf, Nbradp) for this circuit breaker.
• delay reclosing delay Trr delay in reclosing of the first circuit breaker
• inter reclosing delay Tir delays in reclosing each of the following circuit breakers
• Nbradf, Nbradp the number of authorized reclosings for this circuit breaker.
• the reset delay is programmable from 2 seconds to 99 hours 59 minutes.
• the number of resets allowed on a fugitive fault Nbradf is the number of resets allowed on a fugitive fault before the resetting module is locked.
• the minimum value is 1, the maximum value is 10 and the default value is 5.
• the number of resets authorized on permanent fault Nbradp is the number of resets authorized on permanent fault before the resetting module is blocked.
• the minimum value is 0, the maximum value is 10 and the default value is 0.

Landscapes

• Emergency Protection Circuit Devices (AREA)

Applications Claiming Priority (5)

Publications (1)

Family

ID=26234664

Family Applications (1)

Country Status (2)

Families Citing this family (1)

Citations (1)

Family Cites Families (6)

• 1999
  • 1999-11-18 EP EP99956082A patent/EP1131875A1/de not_active Withdrawn
  • 1999-11-18 WO PCT/FR1999/002837 patent/WO2000031850A1/fr not_active Application Discontinuation

Patent Citations (1)

Also Published As

Similar Documents

Legal Events