基于风险的低压减载策略问题研究  

A Risk-Based Study on Under Voltage Load Shedding Schemes

作　　者：戴剑锋[1] 朱凌志[1] 周双喜[1] 鲁宗相[1] 

机构地区：[1]清华大学电机与应用电子技术系电力系统国家重点实验室,北京市海淀区100084

出　　处：《中国电机工程学报》2006年第19期18-22,共5页Proceedings of the CSEE

基　　金：973国家重点基础研究发展计划项目(2004CB217907)~~

摘　　要：提出了一种基于风险分析的方法来制定低压减载策略。与传统方法不同,文中提出的方法是在对各种意外事件进行综合分析的基础上,通过一系列风险指标来确定低压减载的各种运行参数。根据该方法,能确保将低压减载措施发挥最大功效的母线选作切负荷的最佳地点。低压减载应切除的负荷是根据其造成的风险与切负荷量的相互关系来确定的。而选择最佳减载时间所遵循的原则是使低压减载装置拒动和误动的综合风险最小。对IEEE39节点系统进行的仿真计算表明:由于提出的方法考虑了大量不确定性因素的影响,因此其有助于更加准确、合理地选择低压减载的时间、地点和切负荷量。A risk based method is proposed to design under voltage load shedding （UVLS） scheme. Different with traditional methods, the proposed one employs a series of risk indices, which are obtained based on a full-scale contingencies analysis, to determine the operating parameters of load shedding. According to this method, the load bus, in which the UVLS can exert itself with the highest efficiency to prevent voltage collapse, is selected as the first candidate to execute load shedding. And the amount of loads to be shed is identified though a relationship between risk values and shedding amount. The selection of shedding time conforms to the principle that the compound risk brought by failed shedding and unexpected shedding must be the minimum. Experiments conducted for IEEE 39-bus system reveal that the proposed method redound to identify the location, amount and time of load shedding more accurately and reasonably due to taking into account a great deal of uncertain factors.

关 键 词：风险 概率 后果 低压减载 电压崩溃 

分 类 号：TM73[电气工程—电力系统及自动化]