基于代价函数BP网络的电压稳定裕度计算  

The Calculation of Voltage Stability Margin Based on Cost Function of BP Network

作　　者：李秀卿[1] 褚炳上[1] 赵晨惠[1] 孙艳学 韩宝国[1] 岳颖[1] 范华君[1] 夏庆生[3] 

机构地区：[1]东北电力大学,吉林吉林132012 [2]云峰发电厂,吉林通化134200 [3]东北电力设计院,长春130021

出　　处：《电测与仪表》2011年第10期51-54,共4页Electrical Measurement & Instrumentation

摘　　要：针对电压稳定裕度问题,提出一种基于BP网络的新算法——代价函数BP网络法,该方法采用动态的BP网络对非线性电力系统的潮流进行在线学习、训练,最后计算得出电压稳定裕度。改进过程是将Frobenius范数的平方作为标准误差值,且利用回归分析将相关系数按照大小排列,删除相关程度小的数据,这样有效地减少了BP网络输入维数,提高了算法的计算速度。最后以IEEE39节点系统为例,准确计算出了系统的电压稳定裕度,表明该算法的准确性。BP network algebra algorithm, a new algorithm, based on BP algorithm, is presented for voltage stability margin. This method adopts moving BP network to learn online and train for nonlinear power system trends, and calculates voltage stability margin. Algebra algorithm makes the square of Frobenius norm as the standard error value, and arranges for correlation coefficient, to delete the little correlation＇ s data. It reduces the BP network input dimension and the calculating speed is improved. To IEEE39 node system for example, it calculates voltage stability margins, and shows that the accu racy of thi ~ al ~ori thm.

关 键 词：BP网络 代价函数 多元回归分析 电压稳定裕度 

分 类 号：TM744[电气工程—电力系统及自动化]