CN103913996A - Electromagnetic and electromechanical network division real-time simulation method based on broadband equivalent large-scale power system - Google Patents
Electromagnetic and electromechanical network division real-time simulation method based on broadband equivalent large-scale power system Download PDFInfo
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Abstract
The invention provides an electromagnetic and electromechanical network division real-time simulation method based on a broadband equivalent large-scale power system. The method comprises the following steps that 1) the power system is divided into an electromagnetic network and an electromechanical network, a critical regional power grid of direct-current transmission with fast electromagnetic transient responses, a control and protection system and other important attentions is adopted as the electromagnetic network, and a non-critical regional power grid is adopted as the electromechanical network; 2) according to power grid data, a RTDS real-time simulation model of the electromagnetic network and the electromechanical network is built; 3) based on the broadband equivalence principle, an interface equivalent model of the electromechanical network and the electromagnetic network is built; 4) an RTDS and an embedded electromechanical transient program are utilized for achieving electromagnetic-electromechanical real-time simulation calculation of the large-scale power system. Through electromagnetic-electromechanical network division, real-time simulation resources are effectively optimized, the real-time simulation calculation of the large-scale power system is achieved, meanwhile, the range of the electromagnetic network and the range of the electromechanical network can be adjusted fast, and different simulation needs are met.
Description
Technical field
This is a kind of based on the dynamo-electric subnetting real-time emulation method of the equivalent large-scale electrical power system electromagnetism of wideband, particularly a kind of extensive AC/DC parallel electrical network real-timedigital simulation method, belongs to the innovative approach of AC/DC parallel electrical network real-time emulation method.
Background technology
Electrical network is towards UHV (ultra-high voltage), large capacity, AC/DC parallel operation development at a distance at present, and electrical network has the technical complexity of height, and AC/DC parallel operation characteristic has great impact to the safety and stability of operation of power networks.Therefore, build high-precision extensive AC/DC parallel Power System Simulator to researching and analysing alterating and direct current network operation characteristic, guarantee that power network safety operation has had profound significance.
Real-timedigital simulation mainly adopts detailed power system component electro-magnetic transient mathematical model; the electro-magnetic transient characteristic High Precision Simulation of the key equipment such as D.C. high voltage transmission, non-linear power electronics in real time; simultaneously; real-timedigital simulation possesses the advantage that closed loop connects working control protective device, can truly reflect the working control protection feature of system.
But real-timedigital simulation is retrained by the dimension that solves of system element differential/partial differential equations mathematical model, the dimension-limited of analogue system, is generally applied to the field that simulation scale such as controlling protection test and partial electric grid over-voltage studies is less.
Summary of the invention
The object of the invention is to consider the problems referred to above and provide a kind of high-precision analog alterating and direct current network operation characteristic based on the dynamo-electric subnetting real-time emulation method of the equivalent large-scale electrical power system electromagnetism of wideband.The present invention, by electromagnetism-dynamo-electric subnetting, optimizes real-time simulation resource effectively, realizes large-scale electrical power system real-time simulation and calculates, and possesses rapid adjustment electromagnetic screen and dynamo-electric net scope simultaneously, meets different emulation demands.
Technical scheme of the present invention is: the present invention is based on the large-scale electrical power system electromagnetism-dynamo-electric subnetting real-time emulation method of wideband equivalence, comprise the following steps:
1) divide large-scale electrical power system electromagnetic screen and dynamo-electric scope of netting;
2) build electromagnetic screen and dynamo-electric net real-time simulation primary system model;
3), based on wideband principle of equivalence, set up the interface Equivalent Model of dynamo-electric net;
4) closed loop connects working control/protective device structure power grid control protection real-time emulation system;
5) integrate electromagnetic screen, dynamo-electric net primary system model and control protection real-time emulation system, obtaining large scale electric network electromagnetism-dynamo-electric real-time emulation system, the real-time simulation that utilizes Real Time Digital Simulator to realize large-scale electrical power system is calculated.
Above-mentioned steps 3) the interface Equivalent Model of the dynamo-electric net of foundation comprise the following steps:
31) modeling of frequency dependence admittance matrix and parameter identification: set up the admittance matrix taking frequency as independent variable, suc as formula (1), in order to the quick electromagnetic transient characterisitics of the dynamo-electric mesh portions of high-precision analog,
（1）
In formula, each parameter is by vector fitting method and the optimization bounding algorithm based on linearization and quadratic programming, and the dynamo-electric net frequency characteristic of matching also forces matched curve passive in the frequency range of scanning;
32) definition controlled current source: define a controlled current source, the electromechanical transient simulation result of calculation of dynamo-electric net genset is incorporated to boundary node as Injection Current source, in order to the characteristic of electromechanical transient at a slow speed of the dynamo-electric net of high-precision analog.
Above-mentioned steps 1) the criteria for classifying be: to there is the direct current transportation of quick electromagnetic transient response and to control critical area electrical network that protection system etc. pays close attention to as electromagnetic screen, taking non-critical areas electrical network as dynamo-electric net.
Above-mentioned steps 2) electromagnetic screen and dynamo-electric net real-time simulation primary system model comprise the mathematical model of DC converter valve, change of current change, DC line and alternating current circuit, generator, transformer, load.
Above-mentioned steps 3) wideband principle of equivalence be electro-magnetic transient characteristic and the electromechanical transient characteristic of utilizing respectively frequency dependence admittance matrix and controlled current source simulation external system.
Above-mentioned steps 4) power grid control protection real-time emulation system include Real Time Digital Simulator, RTDS interface board and working control protective device; Real Time Digital Simulator is connected with working control protective device by RTDS interface board, forms closed loop test system.
Of the present invention based on the dynamo-electric subnetting real-time simulation of the equivalent electromagnetism of wideband computing method, be electromagnetic screen and dynamo-electric net two parts by dividing large scale electric network, set up respectively electromagnetic screen and the dynamo-electric real-timedigital simulation model of netting, and set up electromagnetism-electromechanical interface model according to wideband principle of equivalence, closed loop connects working control protective device and Real Time Digital Simulator simultaneously, provide a kind of solution for setting up extensive AC/DC parallel electrical network real-time emulation system, to meet AC/DC parallel network system characteristic real-time emulation system accuracy requirement as prerequisite, improve the service efficiency of real-time simulation resource, increase grid simulation scale, the division scope with dynamo-electric net by amendment electromagnetic screen simultaneously, can meet the demand of different emulation.The present invention is the dynamo-electric subnetting real-time emulation method of a kind of convenient and practical, high-precision large-scale electrical power system electromagnetism based on wideband equivalence.
Brief description of the drawings
Fig. 1 is the schematic diagram of wideband equivalence in this electricity-generating method;
Fig. 2 is the dynamo-electric subnetting structural representation of the electromagnetism in the inventive method;
Fig. 3 is the implementing procedure figure of the inventive method;
embodiment:
Technical scheme of the present invention: of the present invention based on the dynamo-electric subnetting real-time simulation of the equivalent electromagnetism of wideband computing method, below taking the south electric network electrical network scale of 2012 as example, adopt the inventive method to set up AC/DC parallel electrical network real-time emulation system.
The south electric network grid structure of 2012, has 1071 nodes, 1379 circuits, and 177 generators, 5 times DC transmission system, carry out simulation modeling with 30 RTDS computing units, comprise the steps:
1) divide large-scale electrical power system electromagnetic screen and dynamo-electric scope of netting;
2) build electromagnetic screen and dynamo-electric net real-time simulation primary system model;
3), based on wideband principle of equivalence, set up the interface Equivalent Model of dynamo-electric net;
4) closed loop connects working control/protective device structure power grid control protection real-time emulation system;
5) integrate electromagnetic screen, dynamo-electric net primary system model and control protection real-time emulation system, obtaining large scale electric network electromagnetism-dynamo-electric real-time emulation system, the real-time simulation that utilizes Real Time Digital Simulator to realize large-scale electrical power system is calculated.
Above-mentioned steps 1) for divide the direct current transportation to there is quick electromagnetic transient response and control protection system, 500kV main grid structure and critical area electrical network that receiving end electrical network 220kV and above interchange rack etc. are paid close attention to as electromagnetic screen, taking all the other non-critical areas electrical networks as dynamo-electric net;
Above-mentioned steps 2) for setting up the mathematical Model of Real time Simulations such as electromagnetic screen and dynamo-electric DC converter valve, change of current change, DC line and alternating current circuit of netting, generator, transformer, load.
Above-mentioned steps 3) based on wideband principle of equivalence, wideband principle of equivalence as shown in Figure 1, set up and comprise the following steps by dynamo-electric network interface model:
31) modeling of frequency dependence admittance matrix and parameter identification: set up the admittance matrix taking frequency as independent variable, suc as formula (1), in order to the quick electromagnetic transient characterisitics of the dynamo-electric mesh portions of high-precision analog.
（1）
In formula, each parameter is by vector fitting method and the optimization bounding algorithm based on linearization and quadratic programming, and the dynamo-electric net frequency characteristic of matching also forces matched curve passive in the frequency range of scanning.
32) definition controlled current source: define a controlled current source, the electromechanical transient simulation result of calculation of dynamo-electric net genset is incorporated to boundary node as Injection Current source, in order to the characteristic of electromechanical transient at a slow speed of the dynamo-electric net of high-precision analog.
Above-mentioned steps 4) power grid control protection real-time emulation system structural representation as shown in Figure 2; include Real Time Digital Simulator 1, RTDS interface board 2 and working control protective device 3; Real Time Digital Simulator 1 is connected with working control protective device 3 by RTDS interface board 2, forms closed loop test system.
Above-mentioned closed loop test system simulation large-scale electrical power system, protection system is controlled in 3 simulations of working control protective device; Above-mentioned large-scale electrical power system comprises straight-flow system and AC system, and straight-flow system is connected by change of current bus with AC system.
Above-mentioned large-scale electrical power system is divided into electromagnetic screen and dynamo-electric net, and electromagnetic screen is parallel with dynamo-electric net; Straight-flow system in above-mentioned large-scale electrical power system is electromagnetic screen, and AC system includes electromagnetic screen and dynamo-electric net.
Above-mentioned Real Time Digital Simulator 1 is RTDS.
Above-mentioned working control protective device 3 comprises straight-flow system control protective unit 31, stability control equipment 32 and generator control protective device 33.
Claims (10)
1. based on the dynamo-electric subnetting real-time emulation method of the equivalent large-scale electrical power system electromagnetism of wideband, it is characterized in that comprising the following steps:
1) divide large-scale electrical power system electromagnetic screen and dynamo-electric scope of netting;
2) build electromagnetic screen and dynamo-electric net real-time simulation primary system model;
3), based on wideband principle of equivalence, set up the interface Equivalent Model of dynamo-electric net;
4) closed loop connects working control/protective device structure power grid control protection real-time emulation system;
5) integrate electromagnetic screen, dynamo-electric net primary system model and control protection real-time emulation system, obtaining large scale electric network electromagnetism-dynamo-electric real-time emulation system, the real-time simulation that utilizes Real Time Digital Simulator to realize large-scale electrical power system is calculated.
2. according to claim 1 based on the dynamo-electric subnetting real-time emulation method of the equivalent large-scale electrical power system electromagnetism of wideband, it is characterized in that above-mentioned steps 3) the interface Equivalent Model of the dynamo-electric net of foundation comprise the following steps:
31) modeling of frequency dependence admittance matrix and parameter identification: set up the admittance matrix taking frequency as independent variable, suc as formula (1), in order to the quick electromagnetic transient characterisitics of the dynamo-electric mesh portions of high-precision analog,
（1）
In formula, each parameter is by vector fitting method and the optimization bounding algorithm based on linearization and quadratic programming, and the dynamo-electric net frequency characteristic of matching also forces matched curve passive in the frequency range of scanning;
32) definition controlled current source: define a controlled current source, the electromechanical transient simulation result of calculation of dynamo-electric net genset is incorporated to boundary node as Injection Current source, in order to the characteristic of electromechanical transient at a slow speed of the dynamo-electric net of high-precision analog.
3. according to claim 1 based on the dynamo-electric subnetting real-time emulation method of the equivalent large-scale electrical power system electromagnetism of wideband; it is characterized in that above-mentioned steps 1) the criteria for classifying be: to there is the direct current transportation of quick electromagnetic transient response and to control critical area electrical network that protection system etc. pays close attention to as electromagnetic screen, taking non-critical areas electrical network as dynamo-electric net.
4. according to claim 1 based on the dynamo-electric subnetting real-time emulation method of the equivalent large-scale electrical power system electromagnetism of wideband, it is characterized in that above-mentioned steps 2) electromagnetic screen and dynamo-electric net real-time simulation primary system model comprise the mathematical model of DC converter valve, change of current change, DC line and alternating current circuit, generator, transformer, load.
5. the dynamo-electric subnetting real-time emulation method of the large-scale electrical power system electromagnetism based on wideband equivalence according to claim 1, is characterized in that above-mentioned steps 3) wideband principle of equivalence be to utilize respectively frequency dependence admittance matrix and controlled current source to simulate electro-magnetic transient characteristic and the electromechanical transient characteristic of external system.
According to described in claim 1 to 5 any one based on the dynamo-electric subnetting real-time emulation method of the equivalent large-scale electrical power system electromagnetism of wideband; it is characterized in that above-mentioned steps 4) power grid control protection real-time emulation system include Real Time Digital Simulator (1), RTDS interface board (2) and working control protective device (3); Real Time Digital Simulator (1) is connected with working control protective device (3) by RTDS interface board (2), forms closed loop test system.
7. according to claim 6 based on the dynamo-electric subnetting real-time emulation method of the equivalent large-scale electrical power system electromagnetism of wideband, it is characterized in that above-mentioned closed loop test system simulation large-scale electrical power system, protection system is controlled in working control protective device (3) simulation; Above-mentioned large-scale electrical power system comprises straight-flow system and AC system, and straight-flow system is connected by change of current bus with AC system.
8. according to claim 6ly it is characterized in that based on the dynamo-electric subnetting real-time emulation method of the equivalent large-scale electrical power system electromagnetism of wideband above-mentioned large-scale electrical power system is divided into electromagnetic screen and dynamo-electric net, electromagnetic screen walks abreast with dynamo-electric net; Straight-flow system in above-mentioned large-scale electrical power system is electromagnetic screen, and AC system includes electromagnetic screen and dynamo-electric net.
9. according to claim 6 based on the dynamo-electric subnetting real-time emulation method of the equivalent large-scale electrical power system electromagnetism of wideband, it is characterized in that above-mentioned Real Time Digital Simulator (1) is RTDS.
10. according to claim 6 based on the dynamo-electric subnetting real-time emulation method of the equivalent large-scale electrical power system electromagnetism of wideband, it is characterized in that above-mentioned working control protective device (3) comprises straight-flow system control protective unit (31), stability control equipment (32) and generator control protective device (33).
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Cited By (8)
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| CN104238371A (en) * | 2014-08-18 | 2014-12-24 | 国家电网公司 | Portable electric system digital simulation instrument |
| CN104578049A (en) * | 2014-09-19 | 2015-04-29 | 广西电网公司电力科学研究院 | Transient power quality analysis system for electromechanical- electromagnetic transient hybrid simulation |
| CN104898458A (en) * | 2015-04-10 | 2015-09-09 | 柳州职业技术学院 | Software anti-electromagnetic interference method and software anti-electromagnetic interference system for dry quenching elevators |
| CN104933238A (en) * | 2015-06-09 | 2015-09-23 | 国网天津市电力公司 | Duplex-winding power transformer non-linear model and establishing method |
| CN106354973A (en) * | 2016-09-14 | 2017-01-25 | 南方电网科学研究院有限责任公司 | Real-time simulation system for asynchronous induction motor |
| CN108646587A (en) * | 2018-04-18 | 2018-10-12 | 许继电气股份有限公司 | A kind of EMTDC parallel simulation methods and system |
| CN109858070A (en) * | 2018-12-05 | 2019-06-07 | 武汉大学 | A kind of simulation model and method of the Bei Jielong equivalence route of the impedance containing frequency dividing |
| CN110162843A (en) * | 2019-04-28 | 2019-08-23 | 南方电网科学研究院有限责任公司 | A kind of power grid primary system joint electrical secondary system real-time simulation modeling method and device |
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2014
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238371A (en) * | 2014-08-18 | 2014-12-24 | 国家电网公司 | Portable electric system digital simulation instrument |
| CN104238371B (en) * | 2014-08-18 | 2017-01-25 | 国家电网公司 | Portable electric system digital simulation instrument |
| CN104578049A (en) * | 2014-09-19 | 2015-04-29 | 广西电网公司电力科学研究院 | Transient power quality analysis system for electromechanical- electromagnetic transient hybrid simulation |
| CN104578049B (en) * | 2014-09-19 | 2017-10-20 | 广西电网公司电力科学研究院 | A kind of transient power quality analysis system of electromechanical electromagnetic transient hybrid simulation |
| CN104898458A (en) * | 2015-04-10 | 2015-09-09 | 柳州职业技术学院 | Software anti-electromagnetic interference method and software anti-electromagnetic interference system for dry quenching elevators |
| CN104933238A (en) * | 2015-06-09 | 2015-09-23 | 国网天津市电力公司 | Duplex-winding power transformer non-linear model and establishing method |
| CN106354973A (en) * | 2016-09-14 | 2017-01-25 | 南方电网科学研究院有限责任公司 | Real-time simulation system for asynchronous induction motor |
| CN108646587A (en) * | 2018-04-18 | 2018-10-12 | 许继电气股份有限公司 | A kind of EMTDC parallel simulation methods and system |
| CN109858070A (en) * | 2018-12-05 | 2019-06-07 | 武汉大学 | A kind of simulation model and method of the Bei Jielong equivalence route of the impedance containing frequency dividing |
| CN109858070B (en) * | 2018-12-05 | 2022-07-19 | 武汉大学 | Hybrid simulation model and method of Bergeron equivalent line containing frequency division impedance |
| CN110162843A (en) * | 2019-04-28 | 2019-08-23 | 南方电网科学研究院有限责任公司 | A kind of power grid primary system joint electrical secondary system real-time simulation modeling method and device |
| CN110162843B (en) * | 2019-04-28 | 2023-01-03 | 南方电网科学研究院有限责任公司 | Real-time simulation modeling method and device for power grid primary system and secondary system |
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