基于等效电流量测变换的电力系统状态估计方法

针对输电系统和配电系统量测类型多的特点,采用了以等效电流量测变换技术来求解电力系统状态估计的方法,并推导了基于等效电流量测变换状态估计的具体求解过程。文中将各种类型的量测变换为等效电流量测进行状态估计,同时根据误差理论将原始量测的权重也对应变换成等效电流量测的权重。理论分析和算例结果表明,利用等效电流量测变换技术进行状态估计快速、有效、实施方便,符合当前电力系统在线应用的实际要求。

A STATE ESTIMATION METHOD OF POWER SYSTEMS BASED ON EQUIVALENT CURRENT MEASUREMENT TRANSFORMATION

To solve state estimation, an equivalent--current--based measurement transformation method (ECBMT) is applied inthis paper in accordance with the characteristic that there are a large number of measurement categories in power systems. Inaddition, the concrete solving process of ECBMT for state estimation is derived. Every kind of measurement is transformed toequivalent current measurement by ECBMT. In the light of error theory, the weight of primary measurement is alsotransformed to the weight of equivalent current measurement. Theoretical analysis and digital tests are carried out. Theresults show that ECBMT is efficient. rapid, convenient in practice for state estimation and fit for the requirement of on--lineapplication in power systems.This is "Shu Guang" Project supported by Shanghai Municipal Education Commission and Shanghai EducationDevelopment Foundation (No' 98SG17).