采用潮流转移分布因子的UPFC控制值整定

Control Value Tuning of UPFC Using Power Flow Transfer Distribution Factors

目前,在含统一潮流控制器(unified power flow controller,UPFC)的电网静态安全分析中,UPFC的控制目标有功功率、无功功率通常采用典型运行数据进行离线分析,控制目标值由试探法确定,计算效率低且和实际运行工况存在一定的差异。为弥补现有控制策略整定方法的不足,文中提出了采用潮流转移分布因子的UPFC控制值整定方法,当电网发生N-1故障时,基于直流潮流法定量计算控制目标值,通过UPFC的潮流控制功能消除线路N-1过载,控制策略可根据能量管理系统(energy management system,EMS)数据在线刷新,可为电网调度提供辅助决策。算例仿真验证了文中算法的有效性和实用性。

At present,in the steady state analysis of power system,the control value of unified power flow con- troller is usually determined by trial method. And the calculation is based on offline typical operating data, which makes it inefficient and less accurate. In order to make up the defect of current analysis,an UPFC control value tuning method based on power transfer distribution factors is brought up in this paper. When N-1 line tripping fault occurs,based on DC power flow method,the control value isset and the N-1 line overload is eliminated by UPFC＇s power control.Furthermore,the control scheme list could be formed and updated based on energy management system（EMS）data. This method mentioned above could provide decision making support to power grid dispatching institutions. The results of a simulation example shows that the method is efficient and utilizable.