基于戴维南等值参数的紧急态势分析  

Urgent Situation Analysis Based on Thevenin Equivalent Parameters

作　　者：李来福[1] 柳焯[2] 

机构地区：[1]江苏省电力公司,江苏省南京市210024 [2]哈尔滨工业大学,黑龙江省哈尔滨市150001

出　　处：《电网技术》2008年第21期63-67,共5页Power System Technology

基　　金：国家自然科学基金资助项目(59477010;50477008);高等学校博士学科点专项科研基金资助项目(20040213031)~~

摘　　要：提出了基于戴维南等值参数和潮流解算的紧急态势分析方法。结合N-1安全评估,考察了N-1事故后的紧急工况,深入研究了在供求矛盾条件下,电网后续危机发展的态势与坚韧度问题。研究表明,提高较小节点的负荷阻抗模与戴维南阻抗模比值,可能缓解后续危机(包括电压失稳危机和线路跳闸危机),提高紧急运行方式的坚韧度。An urgent situation analysis method based on Thevenin equivalent parameters and power flow calculation is proposed. Combining with N-1 security assessment, the urgent operation pattern after N-1 accident is explored; the developing tendency of power system subsequent crisis and the tenacity under the imbalance between power supply and demand is researched in depth. Research results show that it is possible to alleviate the subsequent crisis, including voltage instability and trip-out of transmission line, by increasing the value of impedance modulus ratio of such nodes where the ratio of nodal load impedance modulus to Thevenin impedance modulus is lower as well as to enhance the tenacity of urgent operation pattern.

关 键 词：电力系统 紧急态势分析 戴维南等值 后续危机 坚韧度 

分 类 号：TM712[电气工程—电力系统及自动化]