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基于灵敏度分析的多区域互联电力系统状态估计
引用本文:王永,郭志忠,彭茂君,任江波. 基于灵敏度分析的多区域互联电力系统状态估计[J]. 电力系统自动化, 2007, 31(19): 27-31
作者姓名:王永  郭志忠  彭茂君  任江波
作者单位:哈尔滨工业大学电气工程及自动化学院,黑龙江省哈尔滨市,150001;哈尔滨工业大学电气工程及自动化学院,黑龙江省哈尔滨市,150001;许继电力科学研究院,北京市,100085;北京电力公司,北京市,100031;河北省电力调度中心,河北省石家庄市,050021
摘    要:研究了多区域互联电力系统的状态估计问题,提出了基于灵敏度分析的互联电力系统的状态估计方法.该方法将互联系统联络线两端子系统状态估计独立计算所得线路功率不匹配量作为各子系统的虚拟变化量测量,基于各子系统量测量、状态量和功率估计值之间的灵敏度关系,计算修正各子系统状态量和功率估计值,迭代求解互联系统状态估计解.仿真试验结果充分说明该状态估计方法计算结果准确、速度快,且在互联系统计算中心无法获得部分子系统数据情况下,能够最大限度地准确给出互联的可观测系统状态估计解.

关 键 词:状态估计  多区域互联系统  灵敏度分析  变化量测  加权最小二乘法
收稿时间:2007-01-12
修稿时间:2007-09-07

State Estimation of a Multi-area Interconnected Power System Based on Sensitivity Analysis
WANG Yong,GUO Zhizhong,PENG Maojun,REN Jiangbo. State Estimation of a Multi-area Interconnected Power System Based on Sensitivity Analysis[J]. Automation of Electric Power Systems, 2007, 31(19): 27-31
Authors:WANG Yong  GUO Zhizhong  PENG Maojun  REN Jiangbo
Affiliation:1. Harbin Institute of Technology, Harbin 150001, China;2. Xuji Electric Power Research Institute, Beijing 100085, China;3. Beijing Electric Power Corporation, Beijing 100031, China;4.Hebei Electric Power Dispatch Center, Shijiazhuang 050021, China
Abstract:The state estimation in a multi-area interconnected power system is investigated and a new approach based on sensitivity analysis is presented.The state estimators of subsystems at both ends of tie lines carry out individual calculation. And the mismatch power obtained is taken as the virtual variation of measurement.Based on the relations between the sensitivity among state variables,measurements and power estimates,the state vector and power estimates of the interconnected power system are resolved in the computation center by iteration.Test results show that the calculation is very accurate and rapid.Even with part of the subsystem data unavailable,this approach can still provide the state estimation solution for the interconnected power system composed of the observable subsystems.
Keywords:state estimation  multi area interconnected system  sensitivity analysis  changed measurements  weighted least squares(WLS)method
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