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基于安装有UPFC的联络线上潮流关系的分析，研究了按有功功率或无功功率单独调节方式控制LJPW的可能性，并给出了定有功功率或定无功功率单独调节方式下UPFC等效控制参数的取值解析表达式；研究了定功率调节的可实现范围和求解方法，并以仿真结果的几何形式对可实现范围进行了解释．最后，给出了一种实用的定有功功率或定无功功率调节的方法．
Based on the analysis of the power flow in the tie line with UPFC installed, the possibility of controlling LJPW with active power or reactive power alone is studied. The UPFC equivalent of active power or reactive power with independent regulation is given The analytic expressions of the control parameters are studied. The realizable range and the solution method of constant power regulation are studied. The realizable range is explained by the geometrical results of the simulation results. Finally, a practical method of fixed or reactive power regulation is given.