CN202488143U - Real-time digital simulation platform used for transformer station parallel capacitor device fault analysis - Google Patents
Real-time digital simulation platform used for transformer station parallel capacitor device fault analysis Download PDFInfo
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- CN202488143U CN202488143U CN 201120496768 CN201120496768U CN202488143U CN 202488143 U CN202488143 U CN 202488143U CN 201120496768 CN201120496768 CN 201120496768 CN 201120496768 U CN201120496768 U CN 201120496768U CN 202488143 U CN202488143 U CN 202488143U
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Abstract
The utility model relates to a real-time digital simulation platform used for the transformer station parallel capacitor device fault analysis. The real-time digital simulation platform is composed of a primary system model and a secondary system model. The primary system model includes an equivalent transformer model, a transformer incoming power supply equivalent model, an equivalent feed load model, an ABC three-phase parallel capacitor model which is in a double-star or bridge connection mode, an ABC three-phase parallel capacitor model which is in a single-star connection mode, and a harmonic wave source model. The secondary system model is a switching control logic model of two capacitor switches, and the two switches are basically same in terms of control logic. The RTDS simulation testing platform of the reactive compensation device operation environment is strong in adaptability and is high in available rate, can simulate any stable operation condition and operation, and the temporary fault state of a capacitor device, and plays an irreplaceable role in the performance testing and function verification of a control protection device, and the research and development of a new technology or product.
Description
Technical field
The utility model relates to a kind of real-timedigital simulation platform that is used for the Substation Parallel Capacitor equipment fault analysis, belongs to the electric system simulation technical field.
Background technology
Real-timedigital simulation RTDS (Real Time Digital Simulator) is one of the most frequently used experimental technique in power technology field, and the whole world has electric power company of hundreds of family, electric power research institute/institute, electric equipment manufacturer and colleges and universities electric power laboratory to carry out the emulation experiment work such as scientific research and testing, demonstration, product development, equipment debugging, teaching demonstration of electric power system aspect with RTDS.
Transformer station is the basis of constructing electric power system, and reactive power compensation shunt capacitor equipment is one of capital equipment of transformer station, and its security of operation is related to the security and stability of whole electrical network.The shunt capacitor accident problem that takes place frequently to existing has for a long time been paid close attention to and has been inquired into for many years, and relevant research also is seen in the periodical literature of publishing frequently.Make a general survey of achievement in research in the past; Amplify Mechanism analysis to the capacitor harmonic wave; Though being arranged, some judge the quantitative Analysis formula of harmonic resonance frequency; But comprehensive and accurate inadequately, subject matter is not comprise simultaneously the influencing factor of capacitors in series reactance Rate and these two parameters of equipment mounting points busbar short-circuit capacity; The order of severity and switching overvoltage and overcurrent as for harmonic wave harm then still lack blanket accurate quantification analysis means so far.See from research method; Past all is to adopt off-line numerical simulation Software tools such as EMTP or PSCAD to carry out special case analysis to comparatively serious case basically; Receive the restriction of defectives such as off-line computed in software efficient is low, the emulation cycle is short; The simulation result that is drawn can not accurately reflect the whole state change process that physical device takes place from the potential faults to the accident, thereby can't reduce equipment failure rate effectively on the whole.
As stated; For more complete, grasp the variation characteristic of shunt capacitor equipment actual motion state exactly; Be necessary to develop a cover substation simulation model, as the dynamic analog test platform that the shunt capacitor equipment operating environment is analyzed and fault cause is studied based on the RTDS real-time.
Summary of the invention
The purpose of the utility model is; Develop a cover substation simulation model; Be used for the steady operation and the transition effect of reactive power compensation shunt capacitor equipment are imitated on-the-spot overall process digitlization dynamic analog test, realize maximum actual versatility with the simplest equivalent model.
The technical scheme of the utility model is that the utility model real-timedigital simulation (RTDS) platform is made up of primary system model and electrical secondary system model.The primary system model comprises the ABC parallel three phase capacitor model harmonic source model of Equivalent Transformer model, transforming plant lead-in power supply equivalent model, equivalent feed load model, double star or the ABC parallel three phase capacitor model of Gratz connection, single star-star connection; Transforming plant lead-in power supply equivalent model connects the input of Equivalent Transformer model, and equivalent feed load model connects the output of Equivalent Transformer model; The ABC parallel three phase capacitor model harmonic source model of the ABC parallel three phase capacitor model of Equivalent Transformer model, double star/Gratz connection, the single star-star connection three phase mains that gets access to grid respectively.
The Equivalent Transformer model of primary system model is by three electric pressures of a three-winding transformer simulation transformer station; Transformer parameter might not be the parameter of actual main transformer, but according to operational mode equivalent (for example capacity of short circuit is very big or short-circuit impedance is very little during many main transformer parallel runnings); Transforming plant lead-in power supply equivalent model is the highest voltage level bus (receiving goddess of lightning's line) that a Dai Weinan power frequency supply is used for simulating transformer station, and equivalent feed load model is RL parallel circuits simulation transformer station's second level voltage bus (power lead); The bus that transformer Δ winding is connected is exactly a reactive power compensation shunt capacitor equipment mounting points, also is connected to a Dai Weinan equivalent source in this, and this power source model is used for simulating harmonic source, and the internal impedance of power supply must be set to the capacitive reactance much larger than single capacitor.
The utility model has made up universal shunt capacitor component models in the primary system model; Said universal shunt capacitor model constitutes by two groups; One group is the ABC parallel three phase capacitor model of single star-star connection structure, and another group is the ABC parallel three phase capacitor model of double star/Gratz connection structure.The parameter of capacitor model can be provided with according to operational mode or artificial tasks flexibly, and the end points design of integrated capacitor UDC component models simultaneously makes the primary system modeling can very conveniently adapt to any reaying protection test requirement quickly.
The electrical secondary system model mainly be two group capacitor switches throwing, cut the control logic model, two groups of switch control logics are basic identical.Said electrical secondary system model comprise breaking-closing operating button, " alternative " switch, " or " logic with " with " logic, R-S trigger, transmit delay circuit.
In Fig. 2 and Fig. 3, the switch knob signal receives an AND gate condition restriction, closes position or relaying protection actuating signal when existing when switch is in originally, and switch can not close; An OR-gate is used for receiving all separating brakes or trip signal; Only be connected to integrated capacitor inner member error protection actuating signal in the utility model, the user can be connected to this OR-gate with external fault protection or other any actuating signal adding that needs to trip as the case may be." alternative " element 17 among Fig. 2 is used for selecting double star (unsymmetrical current protection) or bridge shape (protection of bridge spill current) capacitor model; And " alternative " element 17 among Fig. 3 is that to be used for selecting capacitor be open delta voltage protection or phase voltage differential protection.
The utility model RTDS simulation test platform is mainly used in imitates in-site modeling to the steady operation and the transient process of reactive-load compensation capacitor equipment.To the quantitative analysis of aspects such as conceptual design, soft science research, the utility model can carry out simple RTDS Digital Simulation experiment, and promptly primary system model and electrical secondary system model all are made up of the RTDS mathematical model.Actual device functional verification test to aspects such as engineering debug, new product developments; The utility model can carry out the device closed test of physical layer; Promptly by RTDS the primary system mathematical model equivalent with actual electric network is provided, the control protective device of Secondary Part then is that (usually as test specimen) in kind links to each other with the RTDS mathematical model through input/output interface equipment such as signal power amplifier, photoelectricity isolation.
The beneficial effect of the utility model and prior art comparison is; The reactive-load compensation equipment running environment RTDS simulation test platform that the utility model is set up; Have the advantages that adaptability is strong, availability factor is high; Any steady operation situation and operation and fault transient process that can analog capacitor equipment; It not only can be as simple numerical computations instrument when checking work such as design, device parameter selection, the more important thing is that it can be in the closed loop physical test of all kinds of actual engineerings, for example in the performance test of control protective device and work such as functional verification, new technology new-product development, play irreplaceable effect.
Description of drawings
Fig. 1 is the primary system RTDS model of the utility model emulation platform;
Fig. 2 throws, cuts logic control RTDS model for the double star/Gratz connection capacitor group switch of the utility model emulation platform;
Control RTDS model is thrown, cut to single star-star connection capacitor group switch of Fig. 3 the utility model emulation platform;
Picture in picture number expression: the 1st, transforming plant lead-in power supply equivalent model; The 2nd, the Equivalent Transformer model; The 3rd,
Equivalence feed load model; The 4th, the ABC parallel three phase capacitor model of double star or Gratz connection; The 5th, the ABC parallel three phase capacitor model of single star-star connection; The 6th, the harmonic source model; The 11st, the unsymmetrical current sampled value; The 12nd, instantaneous value-effective value; The 13rd, " IF-ELSE " logic; The 14th, transmit time-delay; The 15th, the breaking-closing operating button; The 16th, transmit time-delay; The 17th, " alternative " switch; The 18th, " or " logic; The 19th, " with " logic; The 20th, the R-S trigger; The 21st, transmit time-delay.
Embodiment
The embodiment of the utility model such as Fig. 1, Fig. 2 and shown in Figure 3,
The utility model embodiment is used for the real-timedigital simulation platform of Substation Parallel Capacitor equipment fault analysis and is made up of primary system model and electrical secondary system model.The primary system model comprises the ABC parallel three phase capacitor model 5 harmonic source models 6 of Equivalent Transformer model 2, transforming plant lead-in power supply equivalent model 1, equivalent feed load model 3, double star or the ABC parallel three phase capacitor model 4 of Gratz connection, single star-star connection.Transforming plant lead-in power supply equivalent model 1 connects the input of Equivalent Transformer model 2, and equivalent feed load model 3 connects the output of Equivalent Transformer model 2; The ABC parallel three phase capacitor model 5 harmonic source models 6 of the ABC parallel three phase capacitor model 4 of Equivalent Transformer model 2, double star/Gratz connection, the single star-star connection three phase mains that gets access to grid respectively.
The electrical secondary system model mainly be two group capacitor switches throwing, cut the control logic model, two groups of switch control logics are basic identical.In Fig. 2 and Fig. 3, the switch knob signal receives an AND gate condition restriction, closes position or relaying protection actuating signal when existing when switch is in originally, and switch can not close; An OR-gate is used for receiving all separating brakes or trip signal; Only be connected to integrated capacitor inner member error protection actuating signal in the utility model, the user can be connected to this OR-gate with external fault protection or other any actuating signal adding that needs to trip as the case may be." alternative " element 17 among Fig. 2 is used for selecting double star (unsymmetrical current protection) or bridge shape (protection of bridge spill current) capacitor model; And " alternative " element 17 among Fig. 3 is that to be used for selecting capacitor be open delta voltage protection or phase voltage differential protection.
The utility model execution mode is flexible, convenient, efficient, specifically mainly is divided into two steps:
(1) electric pressure, steady state operating condition, capital equipment nameplate parameter and the background harmonics according to actual transformer station carries out the parameter setting to each component models of primary system in the emulation platform; What need to specify is: can be wherein in the two group capacitor models one group model parameter is set as subjects by actual single capacitor device parameter, the model parameter of another ancient sacrificial utensil is pressed many parallelly connected equivalent parameters settings simultaneously.
(2) operation rules and the relaying protection configuration according to actual shunt capacitor is provided with throwing, cuts and close and protection action logic correlation model, and the triggering logical model of various phenomena of the failure can be set according to the research task simultaneously.
Claims (2)
1. a real-timedigital simulation platform that is used for the Substation Parallel Capacitor equipment fault analysis is characterized in that, said real-timedigital simulation platform is made up of primary system model and electrical secondary system model;
Said primary system model comprises the ABC parallel three phase capacitor model harmonic source model of Equivalent Transformer model, transforming plant lead-in power supply equivalent model, equivalent feed load model, double star or the ABC parallel three phase capacitor model of Gratz connection, single star-star connection; Transforming plant lead-in power supply equivalent model connects the input of Equivalent Transformer model, and equivalent feed load model connects the output of Equivalent Transformer model; The ABC parallel three phase capacitor model harmonic source model of the ABC parallel three phase capacitor model of Equivalent Transformer model, double star/Gratz connection, the single star-star connection three phase mains that gets access to grid respectively;
The throwing that said electrical secondary system model is two group capacitor switches, cut the control logic model; Two groups of switch control logics are basic identical, said electrical secondary system model comprise breaking-closing operating button, " alternative " switch, " or " logic with " with " logic, R-S trigger, transmit delay circuit.
2. the real-timedigital simulation platform that is used for the Substation Parallel Capacitor equipment fault analysis according to claim 1 is characterized in that said primary system model and electrical secondary system model all are made up of the RTDS mathematical model.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201120496768 CN202488143U (en) | 2011-12-05 | 2011-12-05 | Real-time digital simulation platform used for transformer station parallel capacitor device fault analysis |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201120496768 CN202488143U (en) | 2011-12-05 | 2011-12-05 | Real-time digital simulation platform used for transformer station parallel capacitor device fault analysis |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219772A (en) * | 2017-05-23 | 2017-09-29 | 南方电网科学研究院有限责任公司 | Method, device and system for testing function indexes of multi-loop fault suppression and isolation device |
| CN107894542A (en) * | 2017-10-20 | 2018-04-10 | 国电南瑞科技股份有限公司 | The supporting secondary device test system of synchronous capacitor and method |
| CN108206508A (en) * | 2016-12-20 | 2018-06-26 | 南京南瑞继保电气有限公司 | A kind of adaptive shunt capacitor impedance protecting method |
| CN111983385A (en) * | 2020-08-19 | 2020-11-24 | 国网河南省电力公司漯河供电公司 | Line fault testing method based on asymmetry |
-
2011
- 2011-12-05 CN CN 201120496768 patent/CN202488143U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108206508A (en) * | 2016-12-20 | 2018-06-26 | 南京南瑞继保电气有限公司 | A kind of adaptive shunt capacitor impedance protecting method |
| CN108206508B (en) * | 2016-12-20 | 2019-05-21 | 南京南瑞继保电气有限公司 | A kind of adaptive shunt capacitor impedance protecting method |
| CN107219772A (en) * | 2017-05-23 | 2017-09-29 | 南方电网科学研究院有限责任公司 | Method, device and system for testing function indexes of multi-loop fault suppression and isolation device |
| CN107894542A (en) * | 2017-10-20 | 2018-04-10 | 国电南瑞科技股份有限公司 | The supporting secondary device test system of synchronous capacitor and method |
| CN111983385A (en) * | 2020-08-19 | 2020-11-24 | 国网河南省电力公司漯河供电公司 | Line fault testing method based on asymmetry |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121206 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121206 Address after: No. 88, min Qiang Road, private science and Technology Park, Jiangxi, Nanchang Patentee after: Jiangxi Electric Power Science Academy Patentee after: State Grid Corporation of China Address before: No. 88, min Qiang Road, private science and Technology Park, Jiangxi, Nanchang Patentee before: Jiangxi Electric Power Science Academy |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20201205 |
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| CF01 | Termination of patent right due to non-payment of annual fee |