CN202649381U - GOOSE-based small-current grounding route selection system of intelligent transformer substation - Google Patents
GOOSE-based small-current grounding route selection system of intelligent transformer substation Download PDFInfo
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- CN202649381U CN202649381U CN 201220326292 CN201220326292U CN202649381U CN 202649381 U CN202649381 U CN 202649381U CN 201220326292 CN201220326292 CN 201220326292 CN 201220326292 U CN201220326292 U CN 201220326292U CN 202649381 U CN202649381 U CN 202649381U
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Abstract
The utility model relates to a GOOSE-based small-current grounding route selection system of an intelligent transformer substation. The system comprises a spacing protection measurement and control apparatus and a small-current grounding route selection device or a monitoring system host that includes a small-current grounding route selection function module. The spacing protection measurement and control apparatus that is used as a collection unit of the system is used for collecting voltages and currents of all elements on a bus and employing a GOOSE message to send information. And the small-current grounding route selection device or the monitoring system host is used for carrying out route selection by employing the small-current grounding route selection function criterion according to all the received interval voltages and current magnitudes. Besides, the spacing protection measurement and control apparatus and the small-current grounding route selection device or the monitoring system host carry out communication and information exchange by a station level network and switching equipment of the station level. According to the actual demand of the intelligent transformer substation, the existing spacing protection measurement and control apparatus and the station level network in the transformer substation are utilized to complete data collection and transmission functions; and there is no need to configure an independent collection device and lay a secondary cable, thereby reducing the engineering cost. Moreover, the data transmission speed is fast and the reliability is high.
Description
Technical field
The utility model belongs to the relay protection technical field of automation of power engineering, relates to the Little Current Ground Connection System of the 3～66kV voltage side in the intelligent substation, to improve the safe reliability of Operation of Electric Systems.
Background technology
China 3～66kV power network neutral point adopts earth-free more or through two kinds of non-effective earthing modes of grounding through arc (resonance grounding), is called traditionally the small current neutral grounding mode.During low current neutral grounding electric network generation singlephase earth fault, fault current is very little, therefore be called low current grounding.Low current grounding is little to power equipment, communication and hazard to person, and the line voltage between the three-phase remains unchanged substantially, does not affect the power supply to load, therefore, allow electrical network in the situation that single-phase earthing continues operation a period of time, the suddenly interruption of avoiding powering is on user's impact.Along with the pay attention to day by day to the power supply reliability problem, the small current neutral grounding mode more and more is subject to the high praise of power department.Although low current grounding does not affect the normal operation of electrical network, the superpotential that causes thus can endanger line insulation, may cause short trouble, make fault spread, therefore, need to select as early as possible faulty line, so that the operations staff in time takes measures to be processed.
Traditional low-current ground fault line selection implementation method principle as shown in Figure 1.The zero-sequence current of all circuits and the residual voltage of bus access line selection apparatus by secondary cable, and line selection apparatus carries the analog acquisition function, and the line number of going forward side by side reaches calculating according to one's analysis, if need line selection apparatus to realize trip avoidance function, also need to lay control cables.This method need to be installed independent zero sequence current mutual inductor, expend secondary cable many, take up room greatly, construction costs is higher, and a large amount of secondary cable length is subject to electromagnetic interference (EMI) apart from parallel arranged, has affected the correctness of route selection.
The utility model content
The purpose of this utility model provides a kind of intelligent substation Little Current Ground Connection System based on GOOSE, to solve existing method independent zero sequence current mutual inductor need to be installed, expend secondary cable many, take up room large, construction costs is higher, and a large amount of secondary cable length is subject to the problem of electromagnetic interference (EMI) apart from parallel arranged.
For achieving the above object, the intelligent substation Little Current Ground Connection System based on GOOSE of the present utility model comprises:
Protection measure and control device in interval as the collecting unit of system, is used for gathering the voltage and current of each element on the bus and adopting GOOSE message up sending information;
Small Electric Current Earthing And Routing Device or supervisory system main frame, described supervisory system main frame comprises the small current earthing wire-selecting functional module, is used for adopting small current earthing wire-selecting function criterion to carry out route selection according to the voltage and current amount at each interval that receives;
Described interval protection measure and control device and Small Electric Current Earthing And Routing Device or supervisory system main frame are by station level network and station level switch communication and message exchange.
Intelligent substation Little Current Ground Connection System based on GOOSE of the present utility model is according to the actual needs of intelligent substation; utilize existing interval protection measure and control device and station level network data acquisition function and data-transformation facility in the transformer station; with the voltage and current that collects by giving supervisory system main frame or Small Electric Current Earthing And Routing Device independently on the GOOSE; need not to configure independently harvester and lay secondary cable; not only reduced engineering cost; and the electromagnetic interference (EMI) of having avoided a large amount of secondary cables to cause; have very much practical value, and data rate is fast; reliability is high.
Description of drawings
Fig. 1 is traditional low-current ground fault line selection schematic diagram;
Fig. 2 is the Little Current Ground Connection System figure of the utility model embodiment.
Embodiment
As shown in Figure 2; Little Current Ground Connection System is comprised of interval protection measure and control device (containing the protection measure and control devices such as low pressure feeder line, capacitor and reactor), the station level network switch and the supervisory system main frame of 3～66kV side according to arranged spaced, is provided with the small current earthing wire-selecting module in this supervisory system main frame.
The small current earthing wire-selecting method step of Little Current Ground Connection System is as follows:
(1) disperse local mounted each interval protection measure and control device to gather the voltage and current of all elements on the bus in the intelligent substation;
(2) protection measure and control device in interval utilizes the station level network channel, the voltage and current that collects is adopted to send in the circulation in pattern or the sudden change send pattern by giving the small current earthing wire-selecting module on the GOOSE;
(3) the small current earthing wire-selecting module is according to the analog quantity and the quantity of state that receive each interval, adopt colony amplitude comparison than facies principle for isolated neutral system, carry out small current earthing wire-selecting for the pattern that the neutral by arc extinction coil grounding system adopts transient criterion and steady-state quantity criterion to combine.
In intelligent substation, interval protection measure and control device is microcomputer device, is easy to finish the analog acquisition function of small current earthing wire-selecting function.This Little Current Ground Connection System is used the analog acquisition function of these interval measure and control devices, finish the data acquisition function of small current earthing wire-selecting function, and with the voltage and current that collects by giving Small Electric Current Earthing And Routing Device or supervisory system main frame on the GOOSE.
The intelligent substation complex automatic system adopts the IEC-61850 communications protocol.The defined type of message of IEC-61850 divides rapid message, tripping operation message, medium speed's message and low speed message.Wherein MMS belongs to medium speed's message and message at a slow speed, and GOOSE belongs to rapid message and tripping operation message.Generally speaking, the process layer event will guarantee speed, adopts the GOOSE message transmissions, and station level does not require fast transport, generally adopts MMS message transmissions information.
The transmission delay of the MMS message of station level is a second level, adopts MMS message transmissions small current earthing wire-selecting analog quantity information then can affect the performance of line-selected earthing device.In order to improve performance, this method adopts GOOSE message transmissions small current earthing wire-selecting analog quantity information at station level, and transmission delay can be brought up to Millisecond.
The realization of small current earthing wire-selecting function can adopt independently hardware unit to finish, and mode that also can software module is arranged in the monitoring system of electric substation.
Small current earthing wire-selecting function criterion adopts the method for many criterions comprehensive distinguishing, and the earthing modes different for electric system adopt different criterions.
Traditional low-current ground fault line selection implementation need to be incorporated into analog quantity in the device apart from secondary cable by a large amount of length, take up room large, construction costs is higher, and secondary cable length is subject to electromagnetic interference (EMI) apart from parallel arranged in a large number, has affected the correctness of route selection.Native system utilizes existing protection measure and control device and station level network equipment realization intelligent substation small current earthing wire-selecting function in the transformer station, and at station level GOOSE message quick data transfering, has very high practical value.
Claims (1)
1. the intelligent substation Little Current Ground Connection System based on GOOSE is characterized in that, this system comprises:
Protection measure and control device in interval as the collecting unit of system, is used for gathering the voltage and current of each element on the bus and adopting GOOSE message up sending information;
Small Electric Current Earthing And Routing Device or supervisory system main frame, described supervisory system main frame comprises the small current earthing wire-selecting functional module, is used for adopting small current earthing wire-selecting function criterion to carry out route selection according to the voltage and current amount at each interval that receives;
Described interval protection measure and control device and Small Electric Current Earthing And Routing Device or supervisory system main frame are by station level network and station level switch communication and message exchange.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220326292 CN202649381U (en) | 2012-07-06 | 2012-07-06 | GOOSE-based small-current grounding route selection system of intelligent transformer substation |
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| CN 201220326292 CN202649381U (en) | 2012-07-06 | 2012-07-06 | GOOSE-based small-current grounding route selection system of intelligent transformer substation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472425A (en) * | 2013-09-17 | 2013-12-25 | 国家电网公司 | Method for applying low-current line selection device performance testing platform |
| CN105974267A (en) * | 2016-06-27 | 2016-09-28 | 国网浙江省电力公司杭州供电公司 | IEC 61850-based low current ground fault positioning system and method |
| CN107317309A (en) * | 2016-04-26 | 2017-11-03 | 国网辽宁省电力有限公司大连供电公司 | A kind of earthing mode Collaborative Control conversion method and system based on GOOSE |
| CN107315128A (en) * | 2016-04-26 | 2017-11-03 | 国网辽宁省电力有限公司大连供电公司 | A kind of distributed earthing wire-selecting method and system based on GOOSE |
| CN107422225A (en) * | 2017-04-28 | 2017-12-01 | 济南置真电气有限公司 | A kind of distributed transient line selection exchanged based on information |
| CN113555958A (en) * | 2020-04-24 | 2021-10-26 | 北京东土科技股份有限公司 | Intelligent power server and power protection measurement and control system |
-
2012
- 2012-07-06 CN CN 201220326292 patent/CN202649381U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472425A (en) * | 2013-09-17 | 2013-12-25 | 国家电网公司 | Method for applying low-current line selection device performance testing platform |
| CN103472425B (en) * | 2013-09-17 | 2015-11-11 | 国家电网公司 | A kind of application process of line selection device for low current performance testing platform |
| CN107317309A (en) * | 2016-04-26 | 2017-11-03 | 国网辽宁省电力有限公司大连供电公司 | A kind of earthing mode Collaborative Control conversion method and system based on GOOSE |
| CN107315128A (en) * | 2016-04-26 | 2017-11-03 | 国网辽宁省电力有限公司大连供电公司 | A kind of distributed earthing wire-selecting method and system based on GOOSE |
| CN107317309B (en) * | 2016-04-26 | 2019-08-30 | 国网辽宁省电力有限公司大连供电公司 | A kind of earthing mode Collaborative Control conversion method and system based on GOOSE |
| CN105974267A (en) * | 2016-06-27 | 2016-09-28 | 国网浙江省电力公司杭州供电公司 | IEC 61850-based low current ground fault positioning system and method |
| CN105974267B (en) * | 2016-06-27 | 2019-10-18 | 国网浙江省电力公司杭州供电公司 | A kind of small current grounding fault positioning system and its method based on IEC 61850 |
| CN107422225A (en) * | 2017-04-28 | 2017-12-01 | 济南置真电气有限公司 | A kind of distributed transient line selection exchanged based on information |
| CN107422225B (en) * | 2017-04-28 | 2019-12-31 | 济南置真电气有限公司 | Distributed transient line selection method based on information exchange |
| CN113555958A (en) * | 2020-04-24 | 2021-10-26 | 北京东土科技股份有限公司 | Intelligent power server and power protection measurement and control system |
| CN113555958B (en) * | 2020-04-24 | 2024-04-09 | 北京东土科技股份有限公司 | Intelligent power server and power protection measurement and control system |
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