摘要
电力系统静态电压稳定域(SVSR)是分析、评估含随机性和不确定性因素影响的电力系统静态电压稳定性的重要工具。连续潮流虽可构建高精度的SVSR,但其计算效率低;超平面近似可提高SVSR构建效率,但其构建的SVSR保守性较强。为提升高精度SVSR构建效率,提出一种SVSR边界快速搜索的优化模型。该优化模型基于电力系统SVSR边界拓扑特性,实现高精度SVSR边界的快速搜索。该优化模型首先采用传统优化潮流模型确定初始SVSR边界点,然后以已求SVSR边界点为初始点,采用所提优化模型搜索下一个SVSR边界点,实现SVSR边界上所有SNB点的快速搜索,进而构建出高精度SVSR边界。最后,通过WECC 3机9节点测试系统、IEEE-118节点测试系统和1354节点欧洲大陆互联电网,对该方法的有效性和实用性进行分析和验证,结果表明,该方法可实现高精度SVSR边界的快速搜索。
Static voltage stability region(SVSR)is a powerful tool to assess the voltage stability in power system with high stochastic and uncertainty.Two typical methods,CPF and hyperplane approximation,are developed to explore the SVSR boundary.The CPF can explore the highly accurate SVSR boundary but aggravates the computational burden;the hyperplane approximation can enhance the computational efficiency of SVSR boundary but may obtain an inaccurate boundary.To enhance the computational efficiency of the SVSR with higher computational precision,a novel optimization model to explore the SVSR boundary is developed in this paper by referring to the topology of the SVSR boundary.An initial SNB point on the SVSR boundary is first explored by tradition optimal power flow(OPF),and then the optimization model is employed to track other SNB points to explore the SVSR boundary using the tracked SNB.The WECC-9 test system,IEEE-118 test system and Union for the Coordination of Transmission of Electricity(UCTE)1354-bus system are employed to evaluate the performance of the proposed optimization model,the results confirm that the proposed optimization model can improve the computational efficiency to explore SVSR boundary with high accuracy.
作者
姜涛
张明宇
崔晓丹
李勇
石渠
Jiang Tao;Zhang Mingyu;Cui Xiaodan;Li Yong;Shi Qu(Department of Electrical Engineering Northeast Electric Power University Jilin 132012,China;NARI Group Corporation(State Grid Electric Power Research Institute)Nanjing 211106,China;Central China Electric Power Dispatching and Control Center Wuhan 430077,China)
出处
《电工技术学报》
EI
CSCD
北大核心
2018年第17期4167-4179,共13页
Transactions of China Electrotechnical Society
基金
国家电网公司科技项目(基于安全域的电网安全稳定评估及辅助决策技术研究)资助
关键词
电压稳定
静态电压稳定域
负荷裕度
最优潮流
Voltage stability,static voltage stability reg ion,loading margin,optimal power flow
