CN105281991A - Distribution network terminal self-description method based on IEC 60870-5-104 protocol expansion - Google Patents
Distribution network terminal self-description method based on IEC 60870-5-104 protocol expansion Download PDFInfo
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- CN105281991A CN105281991A CN201510574856.4A CN201510574856A CN105281991A CN 105281991 A CN105281991 A CN 105281991A CN 201510574856 A CN201510574856 A CN 201510574856A CN 105281991 A CN105281991 A CN 105281991A
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Abstract
The invention discloses a distribution network terminal self-description method based on IEC 60870-5-104 protocol expansion. The content in the protocol is expanded, and the transmission of device description information is realized by means of expanded main station calling terminal messages and terminal responses; and meanwhile, the function of real-time modification of terminal description information of a main station side monitoring system is achieved, and the self-description function of the distribution network terminal is achieved.
Description
Technical field
The present invention relates to a kind of distribution terminal self-described implementation method, belong to for distribution technique field.
Background technology
Distribution terminal is the general name of various remote monitorings for power distribution network, control unit.At present, common distribution terminal is roughly divided into three types: line feed terminals (FTU), distribution transformer terminals (TTU) and station institute's terminal (DTU).Wherein common with line feed terminals FTU.FTU is the long distance automatic monitor controller integrating measurement, protection, monitoring.The basic function of FTU comprises remote measurement, remote signalling, remote control, fault detect and process, failure wave-recording, Power Quality Detection etc.Wherein remote measurement, remote signalling, remote control and Supervisory control and data acquisition (SCADA) function.In addition, distribution terminal also possesses remote maintenance and real time monitoring function.The remote maintenance functions of distribution terminal is modified to distribution terminal Operation and control parameter and adjust in the distance; this function mainly realizes the associated maintenance work parameters relevant to system cloud gray model such as protection definite value being carried out to long-range amendment and device, to alleviate the plant maintenance workload of operations staff.The real time monitoring function of distribution terminal mainly detects in real time to the running status of distribution terminal main functional modules, the operating state of component as main in distribution terminal sampling module, control module and power module etc., when distribution terminal equipment related function module runs appearance exception, distribution terminal should be able to carry out self-inspection to relevant abnormalities and assess the order of severity of fault, and deliver to main website by relevant alarm signal in time, so that operation maintenance personnel can Timeliness coverage processing fault, thus stable, the reliability service of safeguards system.
In distribution is built, need the information by distribution network terminal delivers to main station system, the descriptor of the data manual entry device needing main website to provide according to terminal in work.In prior art, the descriptor real time automatic update of device mainly adopts IEC61850 agreement, and terminal model is mapped to the self-described function that webservices mode realizes main website and terminal room, which is higher for the hardware requirement of terminal installation, change at existing main station system comparatively large, be difficult to directly upgrade to existing operational outfit and system.
Summary of the invention
Goal of the invention: for above-mentioned prior art, proposes a kind of distribution network terminal self-described method based on IEC60870-5-104 protocol extension, realizes the self-described function of distribution terminal.
Technical scheme: a kind of distribution network terminal self-described method based on IEC60870-5-104 protocol extension, comprises the steps:
(1), according to IEC61850 standard in main website to distribution terminal modeling, add on-line monitoring logical device in a model;
(2), when distribution terminal powers on or main website restarts, main website sends calling message to terminal, terminal sends response message, carry out expansion about the type identification of device descriptor according to IEC60870-5-104 stipulations in described response message to obtain, described response message adopts the data type delivery device descriptor of eight-bit group string, and described device descriptor is uploaded to main website successively according to information object address arrangement;
(3), main website is according to the device descriptor of response message real time modifying terminal, detailed process is: main website goes out original device descriptor according to the address search of terminal in main website database, then the description of each information object address in the device descriptor received and original device descriptor is compared one by one, according to the address describing inconsistent information object, description original in database is updated to the description received, and upgrades the system monitoring page at center according to the device descriptor received; If there is not original device descriptor in main website database, then by the device descriptor that receives stored in main website database, and in the system monitoring page at center, add the device descriptor of this terminal.
Beneficial effect: of the present invention a kind of based in the distribution network terminal self-described method of IEC60870-5-104 protocol extension, according to the modeling method of IEC61850 stipulations, unified Modeling is carried out to distribution terminal, and the message of IEC60870-5-104 stipulations is expanded, devise main website calling terminal to describe and terminal responds two kinds of messages, in message, adopt the data type of eight-bit group string to realize uploading of terminal descriptor.Main website side is by automatically detecting descriptor, by the descriptor of main website active inquiry terminal installation during system cloud gray model, judge that whether the descriptor that terminal is sent is consistent with original information in main website, and descriptor is imported main website database, automatic renewal main station system monitors the page, realizes the self-described function of terminal installation.Wherein, in prior art, electrical power distribution automatization system can use the method for IEC60870-5-104+Webservices to realize the communication of distribution main website and distribution terminal usually.But the fail safe of distribution automation system data transmission becomes the focus that grid company is paid close attention to day by day, and Webservices can not ensure the fail safe of transfer of data as publicly-owned agreement.And 104 stipulations itself can not transmit data specifying-information, in this programme, make it support the transmission of self-described information by amplifying message form, thus make system only need to use a kind of communication protocol.
Accompanying drawing explanation
Fig. 1 is FTU information model schematic diagram;
Fig. 2 is the message format schematic diagram that main website calling terminal describes;
Fig. 3 is the message format schematic diagram of terminal responds;
Fig. 4 is self-described information real-time update logical node CTIU schematic diagram;
Fig. 5 is self-described information real-time update algorithm schematic diagram.
Embodiment
Below in conjunction with accompanying drawing the present invention done and further explain.
Based on a distribution network terminal self-described method for IEC60870-5-104 protocol extension, comprise the steps:
(1), according to IEC61850 standard in main website to distribution terminal modeling, add on-line monitoring logical device in a model.According to the classification to FTU function, terminal model is divided into 3 logical device, is respectively LD1 (SCADA), LD2 (protection), LD3 (on-line monitoring).Wherein, LLN0 and LPHD is indispensable two logical nodes of each logical device, and wherein LLN0 comprises the public information in logical device, and LPHD contains the information relevant to physical unit itself.As shown in Figure 1, LD4 comprises multiple logical node, SIMG and SIML is that dielectric monitors, is used for respectively monitoring gas-insulated medium and liquid insulating medium; ZBAT is that the battery of a distant place to distribution terminal is safeguarded on the spot; PTTR is overheated logical node, and this logical node is applicable to all overheated functions.Logical node in LD3 logical device can detect needs to choose according to reality, according to the above terminal model set up, can be generated the self-described ICD file of FTU by device configuration tool.IEC61850-6 standard self-described ICD file adopts substation configuration description language (SCL), UML (UML) and extensible markup language (XML) coding standard to set up.
(2), when distribution terminal powers on or main website restarts, main website sends calling message to terminal, and terminal sends response message, by transmission terminal device descriptor on response message, i.e. self-described ICD file.Carry out expansion about the type identification of device descriptor according to IEC60870-5-104 stipulations in response message to obtain, unlike, in this programme, response message adopts the data type delivery device descriptor of eight-bit group string.Terminal installation, after being connected with main website, by device descriptor according to information object address arrangement, is uploaded to main website after waiting for main website calling message successively.In the present embodiment, main website calling terminal describes message and terminal responds message format as shown in Figures 2 and 3, its type identification is A0H, the data type of each imformosome of terminal responds message is eight-bit group string, by the number of the information object of the every frame message up sending of terminal control, remaining message format is identical with the requirement in 104 stipulations.
(3), with reference to logical node expansion regulation in IEC61850-7-4, main website server creates self-described information real-time update logical node CTIU, and as shown in Figure 4, CTIU inherits the common logic whole specific data of node class and has made corresponding expansion according to correlation function.This logical node is used for main website according to the device descriptor of response message real time modifying terminal, and CTIU logical node is started by the electrifying condition of monitoring main website or terminal.The state information wherein comprised has: power on prompting, terminal of startup, action, terminal number, main website powers on prompting, configuration change alarm; The point information comprised has: start-up study, action delay, terminal name.Wherein, DTID defines the terminal number of systems axiol-ogy, Mpower and Tpower records the electrifying condition of distribution main website and terminal respectively, and ALM defines configuration change alarm.Each CTIU can only monitor the device descriptor of a distribution terminal equipment and carry out real-time update to main website database, if will monitor and upgrade the device descriptor of multiple distribution terminal equipment, can use multiple CTIU.
As shown in Figure 5, by self-described information real-time update logical node CTIU, main website is according to the device descriptor of response message real time modifying terminal, detailed process is: first, main website identifies the device descriptor for a certain terminal received by type identification, original device descriptor is gone out according to the address search of this terminal in main website database, then the description of each information object address in the device descriptor received and original device descriptor is compared one by one, according to the address describing inconsistent information object, description original in database is updated to the description received, and the system monitoring page at center is upgraded according to the device descriptor received, according to actual monitored needs, when can generating the change daily record of descriptor after the change of terminal descriptor on central server and send warning message, prompting monitor staff.If there is not original device descriptor in main website database, then by the device descriptor that receives stored in main website database, and in the system monitoring page at center, added the device descriptor of this terminal by editor, thus complete the self-described information real-time update function of Distributing Terminal Assembly.
The present invention tests on the southern auspicious electrical power distribution automatization system of state's electricity.Main website adopts OPEN-3200, and work station is HP series, adopts linux system, and programming software uses microsoftvisualc++6.0.Terminal adopts PDZ800, and this distribution power automation terminal adopts the hardware platform of high configuration to develop.When distribution terminal powers on or main station system is restarted, the administration interface of main website side shows the calling message of main website transmission immediately, and terminal can send response message by self-described information successively Shang Fa main website in 1 second.Through test of many times, the time sent calling message to terminal replies response message from main website is less than 1s, meets the requirement of electrical power distribution automatization system to the time completely.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (1)
1., based on a distribution network terminal self-described method for IEC60870-5-104 protocol extension, it is characterized in that, comprise the steps:
(1), according to IEC61850 standard in main website to distribution terminal modeling, add on-line monitoring logical device in a model;
(2), when distribution terminal powers on or main website restarts, main website sends calling message to terminal, terminal sends response message, carry out expansion about the type identification of device descriptor according to IEC60870-5-104 stipulations in described response message to obtain, described response message adopts the data type delivery device descriptor of eight-bit group string, and described device descriptor is uploaded to main website successively according to information object address arrangement;
(3), main website is according to the device descriptor of response message real time modifying terminal, detailed process is: main website goes out original device descriptor according to the address search of terminal in main website database, then the description of each information object address in the device descriptor received and original device descriptor is compared one by one, according to the address describing inconsistent information object, description original in database is updated to the description received, and upgrades the system monitoring page at center according to the device descriptor received; If there is not original device descriptor in main website database, then by the device descriptor that receives stored in main website database, and in the system monitoring page at center, add the device descriptor of this terminal.
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Application publication date: 20160127 |