计及负荷静态特性的电力系统静态状态估计算法  

A state estimation algorithm for power system considering static characteristics of load

作　　者：陆子刚[1] 卫志农[1] 孙国强[1] 孙永辉[1] 孙维真[2] 王超[2] 

机构地区：[1]河海大学可再生能源发电技术教育部工程研究中心,江苏南京210098 [2]浙江省电力公司,浙江杭州310000

出　　处：《河海大学学报（自然科学版）》2014年第1期88-94,共7页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(51107032;61104045)

摘　　要：在常规状态估计模型的基础上,提出了考虑负荷节点静态电压特性的电力系统静态状态估计算法。该算法利用负荷幂函数模型或多项式模型,将负荷有功、无功功率等效为以节点电压幅值为变量的方程组,构建新的零注入功率量测,利用加权最小二乘法进行状态估计,在迭代计算中修正传统的雅克比矩阵以及不平衡偏差量。4节点、IEEE-39节点系统以及实际地区电网算例的仿真结果表明,该算法提高了状态估计量精度,具有较好的实用性。A state estimation algorithm for a power system considering static characteristics of load was developed based on the conventional state estimation model .In the developed algorithm , the active power and reactive power of loads were transformed to the power functions or polynomial models with variables of the magnitude of voltage at nodes.New zero-injection measurements were structured .The Jacobian matrix and residuals were corrected during the iteration calculation using the weighted least squares method for state estimation .The simulation results of a 4-bus test system , an IEEE 39-bus test system , and a regional network show that the proposed method improves the accuracy of state estimation and has high practicability .

关 键 词：电力系统 状态估计 负荷静态特性 加权最小二乘法 

分 类 号：TM743[电气工程—电力系统及自动化]