摘要
针对传统的状态估计算法受收敛速度、精度和量测数据类型的限制。提出了在传统量测系统基础上,部分安装PMU混合量测系统的状态估计模型。并对快速分解算法进行了改进。并针对不同的相角量测精度,采用不同的状态估计模型。PMU精度较低时,PMU所在节点的电压相量参与迭代;PMU精度足够高时,直接将PMU量测值作为状态估计的状态解。最后用算例验证了该方法的有效性和相量量测对传统状态估计的改善作用。
The conventional state estimation algorithm is restricted by astringency, precision and data type. The modeling of a hybrid measurement system is proposed which include traditional measurements and partially equipped PMUs. Fast decoupled method has been improved.State estimation models are developed with PMU of different precision. When the precision is low, the voltage phasor at the nodes equipped with PMU is iterated as the state variable. When the precision is high, the date obtained by PMU are taken as the state solution. The effectiveness of the method and the function of phasor measurement in improvement of state estimation are verified by examples.
出处
《微计算机信息》
2009年第16期259-261,共3页
Control & Automation
基金
基金申请人:夏立
项目名称:国防科技重点实验室基金
基金颁发部门:中国人民解放军总装备部(编号不公开)
关键词
相量测量单元
状态估计
量测精度
电力系统
phase measurement unit
state estimation
precision of measurement
power system
