摘要
WAMS和SCADA系统共存,是当前电力系统发展的必然趋势。因此PMU布点问题成为当前必须面对和解决的问题之一。从利用PMU量测提高状态估计精度和状态方程数值稳定性两方面出发,同时兼顾系统的可观测性,提出一种新的PMU配置方法。在传统SCADA量测系统的基础上,部分安装PMU量测形成混合非线性量测模型,分析比较PMU配置过程中状态估计数值稳定性变化、PMU配置前后的状态估计误差方差以及各母线的估计误差方差,仿真结果表明所提方法正确有效。
Currently,the hybrid WAMS/SCADA measurement is the trend of power system.And PMU placement consequently becomes an emergency.Therefore,a new method for selection of suitable PMU placement is proposed in this paper.Based on traditional SCADA measurement system,a hybrid non-linear measurement model is built by installing PMU partially.In PMU placement,the variation of numerical stability of the state equations,error variance of the state estimation and error variance of each bus are analyzed.The simulation results show that the new method perfectly improves the system observability,state estimation precision and numerical stability of the state equations.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2011年第1期31-34,106,共5页
Journal of North China Electric Power University：Natural Science Edition
关键词
电力系统
数据采集与监控系统
PMU配置
非线性
加权最小二乘
power system
supervisory control and data acquisition（SCADA）
PMU placement
nonlinearities
weighted least square
