在线电压安全评估的多重动态决策树方法  

Online Voltage Security Assessment Using Multiple Dynamic Decision Tree

作　　者：顾伟[1] 丁涛[1] 杨自群[1] 万秋兰[1] 

机构地区：[1]东南大学电气工程学院,江苏省南京市210096

出　　处：《中国电机工程学报》2011年第31期142-148,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50907008;60974036)~~

摘　　要：利用数据挖掘技术对电力系统在线动态安全进行评估,能够为系统运行控制提供决策指导,防止连续的系统安全问题。提出一种基于相量测量单元(phasor measurementunit,PMU)的在线电压安全评估算法:利用电网数据库已有的数据离线建立电压安全评估决策树,根据PMU的实时采样数据动态对决策树进行更新,形成动态决策树,在线对电压安全进行监控。此外,利用不同的属性集合构建多重决策树,替代原来单一决策树评估,大大提高了决策树分类的准确度和评估的可靠性。结合IEEE 57节点仿真系统,给出多重动态决策树的构建方法以及多重决策树的模型。仿真结果表明,基于PMU的动态多重决策树是一种在线电压安全评估的可行方法。Power system online dynamic security is assessed by data mining,which can provide decision-making guidance for system operation and prevent continuous system security problems.An online voltage security assessment algorithm based on phasor measurement unit（PMU） was proposed in this paper： by establishing the voltage security evaluation decision tree using existing grid offline database,and updating the tree according to the real-time sampled data regularly,the online dynamic decision tree was formed and the voltage security was monitored.In addition,using different attribute set,an alternative to build multiple decision trees instead of original single decision tree was introduced,which greatly improved the accuracy of decision tree classification and evaluation of the reliability.Using IEEE 57-bus test system,the multiple dynamic decision tree method and the model were presented.Simulation results show that multiple dynamic decision tree based on PMU is a kind of feasible method for online voltage security assessment.

关 键 词：电压安全评估 相量测量单元 决策树 分类与回归树算法 广域测量系统 

分 类 号：TM71[电气工程—电力系统及自动化]