考虑直流无功控制的交直流电网改进潮流计算方法

摘要

提高交直流电网潮流计算结果的精度对于电网规划、运行和调度有着重要的意义.基于交直流潮流计算的模型特点,在电网有功和无功解耦的基础上,提出一种电网改进潮流计算方法,充分计及直流换流站的功率特性和无功控制特性,得到交直流电网无功交换的准确值,进而提高了潮流结果的精确性.本方法适用于不同直流无功控制策略下的潮流计算,并且计算结果更加符合实际运行情况.最后,以江苏电网为例进行验证计算,结果表明所提方法的有效性.%The improvement of the accuracy of power flow calculation result of AC/DC grid is of significance to the plan-ning,operation and dispatching of power grid. Based on the characteristic of AC/DC power flow calculation model ,an improved power flow calculation method is proposed,which decouples the active and reactive powers. The power char-acteristic and the reactive power control of DC converter station are fully taken into account,thus the exact value of pow-er exchange between AC and DC grids is obtained,and the accuracy of power flow result is improved. The proposed method is applicable to the power flow calculation under different DC reactive power control strategies ,and its calcula-tion result agrees with the actual operation conditions better. Finally,Jiangsu power grid is used to versify the proposed method,indicating its effectiveness.