Research and Application of External Network Equivalent Method in Short Circuit Current Calculation

doi:10.11930/j.issn.1004-9649.201711078

Abstract

Abstract: The time consuming of short circuit current calculation increases with the development of the power grid scale, and the requirement for computation software is enhanced. An external equivalent method is introduced for calculation of the short circuit current in order to improve the calculation efficiency. Firstly, the node admittance matrix of the whole power network is equivalently simplified to form the additional elements of the boundary region. And then a simplified power network composed of the study region and boundary region is constructed to calculate the short circuit current in the study region. The validity and efficiency of this proposed algorithm is theoretically analyzed and verified on the IEEE 39-node power system. Finally, the North China power grid is used as an example for external equivalent simplification to form the short circuit calculation data of a certain area, which greatly reduces the scale of the power system and improves the calculation efficiency of short circuit current.

Key words: short circuit current, network equivalent, node admittance matrix, network reconfiguration

CLC Number:

TM744

YANG Jingang, HE Chengming, LI Shunxin, SHI Zhiping, LI Xiaorong, SHI Shaowei. Research and Application of External Network Equivalent Method in Short Circuit Current Calculation[J]. Electric Power, 2018, 51(12): 56-62.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201711078

https://www.electricpower.com.cn/EN/Y2018/V51/I12/56

References 20

[1]	孙奇珍, 蔡泽祥, 李爱民, 等. 500 kV电网短路电流超标机理及限制措施适应性[J]. 电力系统自动化, 2009, 33(21):92-96. SUN Qizhen, CAI Zexiang, LI Aimin, et al. A short-circuit current over-limited mechanism of 500 kV power system and the adaptability of limiting measures[J]. Automation of Electric Power Systems, 2009, 33(21):92-96.
[2]	王佳明, 刘文颖, 李群炬, 等. 基于多层次模糊综合评价模型的短路电流限制措施优化配置[J]. 电网技术, 2011, 35(11):125-129. WANG Jiaming, LIU Wenying, LI Qunju, et al. Optimal configuration of short-circuit current limitation measures based on multilevel fuzzy comprehensive evaluation model[J]. Power System Technology, 2011, 35(11):125-129.
[3]	刘树勇, 孔昭兴, 张来. 天津电网220 kV短路电流限制措施研究[J]. 电力系统保护与控制, 2009, 37(21):103-107. LIU Shuyong, KONG Zhaoxing, ZHANG Lai. Application of measures of limiting 220 kV short circuit currents in Tianjin power grid[J]. Power System Protection and Control, 2009, 37(21):103-107.
[4]	袁娟, 刘文颖, 董明齐, 等. 西北电网短路电流的限制措施[J]. 电网技术, 2007, 31(10):42-45. YUAN Juan, LIU Wenying, DONG Mingqi, et al. Application of measures limiting short circuit currents in Northwest China power grid[J]. Power System Technology, 2007, 31(10):42-45.
[5]	姚淑玲, 田华. 基于BPA和PSASP程序的短路电流计算比对[J]. 电力系统自动化, 2011, 35(14):112-115. YAO Shuling, TIAN Hua. A comparison between BPA and PSASP software programs for calculating short-circuit currents[J]. Automation of Electric Power Systems, 2011, 35(14):112-115.
[6]	盛名良. 网孔等值法在电力系统短路电流计算中的应用[J]. 电网技术, 1997, 21(10):8-10. SHENG Mingliang. Application of mesh equivalence to short circuit analysis[J]. Power System Technology, 1997, 21(10):8-10.
[7]	邵玉槐, 李肖伟, 程晋生. REI等值法用于多节点配电系统短路电流计算的研究[J]. 中国电机工程学报, 2000, 20(4):64-67. SHAO Yuhuai, LI Xiaowei, CHENG Jinsheng. Studies on applying REI method to computing short-circuit fault current of distribution system of many nodes[J]. Proceedings of the CSEE, 2000, 20(4):64-67.
[8]	文明浩, 杨帆. 基于PSASP短路计算的区域电网等值方法[J]. 电网技术, 2012, 36(1):113-117. WEN Minghao, YANG Fan. An equivalence method of regional power network based on short circuit calculation by power system analysis software package[J]. Power System Technology, 2012, 36(1):113-117.
[9]	翁华, 徐政. 一种考虑短路电流指标的动态等值方法[J]. 电力自动化设备, 2012, 32(9):85-89. WENG Hua, XU Zheng. Dynamic equivalence based on short circuit current index[J]. Electric Power Automation Equipment, 2012, 32(9):85-89.
[10]	田华, 王卿, 朱峰, 等. 基于PSASP程序的短路电流计算结果分析比较探讨[J]. 电力系统保护与控制, 2010, 38(1):56-60. TIAN Hua, WANG Qing, ZHU Feng, et al. Comparative study of short-circuit current calculation results based on PSASP software[J]. Power System Protection and Control, 2010, 38(1):56-60.
[11]	冯煜尧, 祝瑞金, 庄侃沁, 等. 华东电网短路电流计算标准研究[J]. 华东电力, 2012, 40(1):74-78. FENG Yuyao, ZHU Ruijin, ZHUANG Kanqin, et al. Short-circuit current calculation standard for East China power grid[J]. East China Electric Power, 2012, 40(1):74-78.
[12]	蓝海波, 范新桥, 张隽, 等. 基于分区等值模型的500kV受端电网分区供电理论[J]. 中国电力, 2016, 49(2):122-127. LAN Haibo, FAN Xinqiao, ZHANG Jun, et al. Study on the theory of partition power supply of 500 kV received power grids based on partition equivalent models[J]. Electric Power, 2016, 49(2):122-127.
[13]	王皓怀, 唐宝, 刘淼, 等. 基于IEC 60909的南方电网短路电流计算方法分析及优化[J]. 中国电力, 2015, 48(10):90-96. WANG Haohuai, TANG Bao, LIU Miao, et al. Analysis and optimization of short-circuit calculation method in CSG based on IEC 60909[J]. Electric Power, 2015, 48(10):90-96.
[14]	杨冬, 刘玉田, 牛新生. 电网结构对短路电流水平及受电能力的影响分析[J]. 电力系统保护与控制, 2009, 37(22):62-66. YANG Dong, LIU Yutian, NIU Xinsheng. Analysis on influence of power grid structure upon short circuit level and power receiving capability[J]. Power System Protection and Control, 2009, 37(22):62-66.
[15]	陶晓丽, 杨志强, 闫有朋, 等. 短路电流计算中两种算法实现阻抗矩阵的比较[J]. 电网技术, 2006, 30(S1):304-307. TAO Xiaoli, YANG Zhiqiang, YAN Youpeng, et al. Realized the nodal impedance matrix by two algorithms in short-circuit current[J]. Power System Technology, 2006, 30(S1):304-307.
[16]	覃琴, 周勤勇, 郭强, 等. 保障系统安全稳定的电网构建应对策略研究[J]. 中国电力, 2016, 49(3):51-58. QIN Qin, ZHOU Qinyong, GUO Qiang, et al. Research on measures to ensure power system security and stability in power grid construction[J]. Electric Power, 2016, 49(3):51-58.
[17]	张海波, 张伯明, 王俏文, 等. 不同外网等值模型对EMS应用效果影响的试验研究[J]. 电网技术, 2006, 30(3):1-6. ZHANG Haibo, ZHANG Boming, WANG Qiaowen, et al. A test investigation on effect of different external network equivalent models on EMS applications[J]. Power System Technology, 2006, 30(3):1-6.
[18]	孙奇珍, 蔡泽祥, 朱林, 等. 互联电网的多端等值方法及其误差分析[J]. 电网技术, 2008, 32(23):67-71. SUN Qizhen, CAI Zexiang, ZHU Lin, et al. Multi-terminal equivalence method of interconnected power system and improvement based on its error analysis[J]. Power System Technology, 2008, 32(23):67-71.
[19]	康义, 陆韶琦, 陈凌云, 等. 适用于电磁暂态仿真的大电网简化方法及在南方电网的应用[J]. 电力建设, 2017, 38(1):31-38. KANG Yi, LU Shaoqi, CHENG Lingyun, et al. A reduction method of large power systems for electromagnetic transient simulation and its application in China Southern Grid[J]. Electric Power Construction, 2017, 38(1):31-38.
[20]	陈伟, 刘莹, 刘晓宇. 考虑网架对短路电流适应性的输电网扩展规划[J]. 四川电力技术, 2018, 41(1):74-77. CHEN Wei, LIU Ying, LIU Xiaoyu. Transmission expansion planning considering adaptability of grid to short-circuit current[J]. Sichuan Electric Power Technology, 2018, 41(1):74-77.