电力系统可用输电能力计算研究
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摘要
随着科技的不断进步和电力工业的不断发展,电网可用输电能力(ATC)作为保证电力系统安全稳定运行的重要信息越来越受到电网调度运行人员的关注,电网ATC计算问题已经成为现代电力系统中十分重要的热点问题之一。研究可用于工程的ATC自动计算方法,将极大提高电网运行调度人员的工作效率。可以预见,在当今建设智能电网的背景下,随着电网调度自动化系统与电网计算分析软件的不断发展,可用于工程的ATC自动计算将得到前所未有的发展。本文主要针对电网的ATC计算展开研究。
论文首先总结了国内外ATC计算方法的最新研究成果,介绍了连续潮流法的基本原理和计算方法,及其在ATC计算中的应用。
针对目前研究较少的多断面ATC问题,以我国某区域电网为例分析了多断面输电极限间相互制约的关系;为提高ATC计算的可靠性,分析了ATC计算中的机组调整方式对电网潮流的影响和对暂态稳定性的影响,基于等面积定则,推导出了三种反映机组暂态稳定特性的指标,提出了一种考虑暂态稳定特性的机组调整策略,算例分析表明该方法可以有效提高工程中ATC计算的准确性;同时,提出了基于断面关联性分析的多断面ATC计算方法,经算例验证,该方法有效解决了多断面ATC计算的难题。
最后给出了一种可用于工程的ATC计算方法,开发了可用于工程的ATC计算模块,已在电网计算分析自动化系统中得到实际应用,效果良好。
ATC(Availabe Transfer Capability), as a important index which guarantees the power system safety and stability, has got much more attention by grid dispatching person due to the continuous advancement of technology and the rapid development of electric power industry. The problem of ATC algorithm has become one of the most hottest and important topics in moden power system. The research on automatic calculation of ATC used in engineering will greatly increase the work efficiency of grid dispatching persons. We can foresee that the automatic calculation of ATC used in engineering will get unprecedented development due to the continuous development of grid dispatching automation system and grid analysis software, especially under the background of the construction for smart grid.This paper is mainly discussing the problem of ATC algorithm for power grid.
This paper summarized the newest research on ATC algorithm both in domestic research and overseas research first, and summed up the problem of ATC about Multi-Section, which the present academia has involved a little, and introduced the algorithm of continuation power flow and its application for ATC.
For the problem of ATC about Multi-Section, this paper analyzed that interrelationship between Multi-Section with a regional grid of our country as an example. In order to improve the reliability of ATC algorithm, it analyzed the influence of the adjusting strategy for generator to power flow and transient stability, and derived three indexs which reflect the property of transient stability for generator based on the equal area criterion. An adjusting strategy of generator which considering the transient stability was proposed. The effectiveness of the proposed approach was tested on WEPRI-36 system. Meanwhile, an ATC algorithm about Multi-Section based on the analysis of interrelationship between two sections was proposed, and the effectiveness of the proposed algorithm was tested on WEPRI-36 system.
Finally, this paper presented an ATC algorithm can be used in application of engineering. A modules of ATC calculation was also developed, the effectiveness of the proposed algorithm was tested on WEPRI-36 system.
论文首先总结了国内外ATC计算方法的最新研究成果,介绍了连续潮流法的基本原理和计算方法,及其在ATC计算中的应用。
针对目前研究较少的多断面ATC问题,以我国某区域电网为例分析了多断面输电极限间相互制约的关系;为提高ATC计算的可靠性,分析了ATC计算中的机组调整方式对电网潮流的影响和对暂态稳定性的影响,基于等面积定则,推导出了三种反映机组暂态稳定特性的指标,提出了一种考虑暂态稳定特性的机组调整策略,算例分析表明该方法可以有效提高工程中ATC计算的准确性;同时,提出了基于断面关联性分析的多断面ATC计算方法,经算例验证,该方法有效解决了多断面ATC计算的难题。
最后给出了一种可用于工程的ATC计算方法,开发了可用于工程的ATC计算模块,已在电网计算分析自动化系统中得到实际应用,效果良好。
ATC(Availabe Transfer Capability), as a important index which guarantees the power system safety and stability, has got much more attention by grid dispatching person due to the continuous advancement of technology and the rapid development of electric power industry. The problem of ATC algorithm has become one of the most hottest and important topics in moden power system. The research on automatic calculation of ATC used in engineering will greatly increase the work efficiency of grid dispatching persons. We can foresee that the automatic calculation of ATC used in engineering will get unprecedented development due to the continuous development of grid dispatching automation system and grid analysis software, especially under the background of the construction for smart grid.This paper is mainly discussing the problem of ATC algorithm for power grid.
This paper summarized the newest research on ATC algorithm both in domestic research and overseas research first, and summed up the problem of ATC about Multi-Section, which the present academia has involved a little, and introduced the algorithm of continuation power flow and its application for ATC.
For the problem of ATC about Multi-Section, this paper analyzed that interrelationship between Multi-Section with a regional grid of our country as an example. In order to improve the reliability of ATC algorithm, it analyzed the influence of the adjusting strategy for generator to power flow and transient stability, and derived three indexs which reflect the property of transient stability for generator based on the equal area criterion. An adjusting strategy of generator which considering the transient stability was proposed. The effectiveness of the proposed approach was tested on WEPRI-36 system. Meanwhile, an ATC algorithm about Multi-Section based on the analysis of interrelationship between two sections was proposed, and the effectiveness of the proposed algorithm was tested on WEPRI-36 system.
Finally, this paper presented an ATC algorithm can be used in application of engineering. A modules of ATC calculation was also developed, the effectiveness of the proposed algorithm was tested on WEPRI-36 system.
引文
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[2]薛禹胜.综合防御由偶然故障演化为电力灾难——北美“8.14”大停电的警示.电力系统自动化. 2003, 27(18): 1~5, 37.
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[2]薛禹胜.综合防御由偶然故障演化为电力灾难——北美“8.14”大停电的警示.电力系统自动化. 2003, 27(18): 1~5, 37.
[3] North American Electricity Reliability Council. Transmission transfer capability: a reference documents for calculating and reporting the electric power transfer capability of interconnected electric systems. Technical Report, NERC, 1995.
[4]李国庆,王成山,余贻鑫.大型互联电力系统区域间功率交换能力研究综述.中国电机工程学报, 2001, 21(4): 20-25.
[5] Ejebe G C, Waight J G, SanotsNieto M, et al. Fastcalculation of linear available transfer capability. IEEE Trans on Power Systems, 2000, 15 (3): 1112- 1116.
[6] Sauer P W, Demaree K D, Pai M A. Stability limited load supply and interchange capability. IEEE Trans on Power Apparatus and Systems, 1983, 102 (11): 3637-3643.
[7] Ejebe G C, Tong J, Waight J G, et al. Available transfer capability calculations. IEEE Trans on Power Systems, 1998, 13(4): 1521- 1527.
[8] Chiang H D, Flueck A J, Shah K S, et al. CPFLOW: a practical tool for tracing power system steady state stationary behavior due to load and generation variations. IEEE Trans on Power Systems, 1995, 10 (2): 623-634.
[9] Flueck A J, Chiang H D, Shah K S. Investigating the installed real power transfer capability of a large scale power system under a proposed multi area interchange schedule using CPFLOW. IEEE Trans on Power Systems, 1996, 11 (2): 883-889.
[10] Luo X, Patton A D, Singh C. Real power transfer capability calculations using multi-layer feed-for-ward neural networks. IEEE Trans on Power Systems, 2000, 15 (2): 903- 908.
[11] Thomas R J, Barnard R D, Meisel J. The generation of quasi steady-state load-flowtrajectories and multiple singular point solutions. IEEE Trans on Power Apparatus and Systems, 1971, 90 (5): 1967-1974.
[12] C L S, STAI C Y, LU C N. Improving base case solution for on-line ATC calculations. IEEE PES. Conference Proceedings on 2000 Power Engineering Society Summer Meeting. Seattle USA: Institute of Electrical and Electronics Engineers, 2000: 27-31.
[13] Gravener M H, Nwankpa C. Available transfer capability and first order sensitivity. IEEE Trans on Power Systems, 1999, 14 (2): 512- 518.
[14] Ou Yan, Singh C. Assessment of Available Transfer Capability and Margins. IEEE Transaction on Power Systems, 2002, 17(2): 463-468.
[15] Feng Xia, Sakis A P, Meliopoulos. A methodology for probabilistic simultaneous transfer capability analysis. IEEE Trans on Power Systems, 1996, 11 (3): 1269- 1278.
[16] Lauby M G, Douda J H, Polesky R W, et al. The procedure used in the probabilistic transfer capability analysis of the MAPP region bulk transmission system. IEEE Trans on Power Apparatus and Systems, 1985, 1104 (11): 3013-3019.
[17] Leite da Silva A M, Manso L A F, Mello J C O, et al. Pseudo-chronological simulation for compositereliability analysis with time varying loads. IEEE Trans on Power Systems, 2000, 15 (1): 73-80.
[18] A.C.G.Melo, M.V.F.Pereira, A.M.Leite da Silva, Frequency and duration calculations in composite generation and transmission reliability evaluation. IEEE Trans on Power Systems, 1992, 7(2): 469-476.
[19]肖颖,宋永华,孙元章.基于混合随机算法的可用输电能力计算.电力系统自动化, 2002, 26(13): 25-31.
[20]崔雅莉,别朝红,王锡凡.输电系统可用输电能力的概率模型及计算.电力系统自动化, 2003, 26(14): 36-40.
[21]高亚静,周明,李庚银等.基于马尔可夫链和故障枚举法的可用输电能力计算.中国电机工程学报, 2006, 26(19): 41-46.
[22]李卫星,李志民,郭志忠等.考虑经济性收益最大的可用输电能力计算.电力系统自动化, 2004, 28(20): 7-11.
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