Abstract：The reliability evaluation equivalence for interconnected power system is researched in detail. An improved equivalent model including equivalent generators, equivalent transmission lines and equivalent loads is proposed for the external system. Putting outage load of the external system to improve the parameter calculation. The parameter calculation process is established by the use of the network flow method. Based on the not loss of load sharing agreement, a new method of combining equivalent states is presented to evaluate the reliability for interconnected power system, and then the conclusion is drawn: ①the addition of equivalent transmission capacity parameter and the improvement of the parameters calculation method can reflect the risk condition in external system more accurately. ②the new method of combining equivalent states can guarantee a certain accuracy and improve computation speed as well. The proposed approach is applied to RBTS test system, and the results show that the method is correct and feasible.
汪兴强, 丁明, 韩平平. 互联电力系统可靠性评估的改进等效模型[J]. 电工技术学报, 2011, 26(9): 201-207.
Wang Xingqiang, Ding Ming, Han Pingping. An Improved Equivalent Model for Reliability Evaluation in Interconnected Power System. Transactions of China Electrotechnical Society, 2011, 26(9): 201-207.
[1] 郭勇基. 电力系统可靠性原理和应用[M]. 北京: 清华大学出版社, 1986. [2] Zhang W, Billinton R. Application of an adequacy equivalent method in bulk power system reliability evaluation [J]. IEEE Transactions on Power Systems, 1998, 13(2): 661-666. [3] Billinton R, Zhang W. Enhanced adequacy equivalent for composite power system reliability evaluation [J]. IEE Proc. Gener. Transm. Distrib., 1996, 143(5): 420-426. [4] Choi J S, Tran T, Moon S I, et al. Tie line equivalent constrained assisting generator model (TEAG) considering forced outage rates of transmission systems-II [C]. Power Engineering Society General Meeting, 2004, 2: 2238-2244. [5] Choi J S, Tran T, Kwon J J, et al. Probabilistic reliability evaluation for interconnecting the power systems in North East Asia [C]. Power Engineering Society General Meeting, 2006. [6] Deng Z, Singh C. A new approach to reliability evaluation of interconnected power systems including planned outages and frequency calculations [J] . IEEE Transactions on Power Systems, 1992, 7(2): 734-743. [7] 李渝曾, 言茂松, 方日升. 互联系统的有效容量分布累积法[J]. 中国电机工程学报, 1994, 14(6): 11-16. [8] 王秀丽, 曹成军, 王锡凡.互联系统可靠性效益评估方法[J]. 电网技术, 2000, 24(7): 1-5 . [9] 孙荣富, 程林, 孙元章. 基于区域发电可靠性的指数解析模型及其应用(一)理论基础[J]. 电力系统自动化, 2007, 31(22): 11-15. [10] 孙荣富, 程林, 孙元章. 基于区域发电可靠性的指数解析模型及其应用(二)容量效益裕度评估[J]. 电力系统自动化, 2007, 31(23): 5-11. [11] Dandachi N H, Cory B J. Network flow methods applied to power system problems—a survey paper[C]. IEE International Conferences on Advances in Power System Control, Operation and Management, Hong Kong, 1991: 621-626. [12] 王锡凡. 电网可靠性评估的随机网流模型[J]. 电力系统自动化, 2006, 30(12): 1-6. [13] 陈惠开. 网论—网络流[M]. 北京：人民邮电出版社, 1992. [14] Billinton R, Allan R N. Reliability evaluation of power systems [M]. Plenum Press, 1996. [15] Billinton R, Kumar S, Chowdhury N, et al. A reliability test system for educational purposes-basic data[J]. IEEE Transactions Power System, 1989, 3: 1238-1244.
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