多支路开断潮流转移识别及防连锁过载策略研究  

Study on Power Flow Transferring Identification of Multi-line Tripping and the Strategy to Prevent Cascading Overload Strategy

作　　者：袁晓丹[1] 张会强 

机构地区：[1]东北电力大学电气工程学院,吉林省吉林市132012

出　　处：《现代电力》2014年第5期74-79,共6页Modern Electric Power

摘　　要：为有效防止发生连锁跳闸,基于直流潮流-补偿原理推导了用于快速预估多支路开断后潮流分布的支路开断分布因子(LTDF)的计算方法,结合改进的严重度函数,给出了用于评价支路受潮流转移影响程度的过载严重度指标和关键支路集的概念及其求解过程,对单支路或多支路开断同样适用。在此基础上研究了减载优化模型和基于广义灵敏度和关键支路集的减载策略,采用该策略对NewEngland 10机39节点系统进行算例分析,结果表明;该方法可有效预估多支路开断后潮流,能在准确识别潮流转移的基础上以最小的调整量快速消除过载,并确保其余支路不过载。In order to effectively prevent cascading tripping of transmission lines, the calculation method of line tripping distribution factors （LTDF） is deduced to rapidly estimate the power flow distribution after system multi-line tripping based on DC power flow and compensation principle. By combing with improved severity function, the concepts of key branch set and overload severity indicator are given to e- valuate impact degree of power flow transferring, and their solving processes are also described, which is also suitable to such cases of single line tripping and multi-line tripping e- qually. On this basis, load shedding optimization model and load shedding strategy based on the generalized sensitivity and key branch set are studied. Taking a 10-generator 39- bus New England System as example, the results show that proposed method can effectively forecast power flow after system multi-line tripping, quickly eliminate the overload with minimum adjustment quantity, and ensure no overload of other branches on the basis of accurate identification of flow transferring.

关 键 词：连锁跳闸 多支路开断 严重度函数 关键支路集 减载策略 

分 类 号：TM71[电气工程—电力系统及自动化]