基于统一潮流控制器的负序抑制最优潮流算法  

Optimal power flow algorithm with negative-sequence suppression based on unified power flow controller

作　　者：陈谦[1] 陈杉桐 张裕 王姝莼 刘莹 CHEN Qian;CHEN Shantong;ZHANG Yu;WANG Shuchun;LIU Ying(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,China;Power Grid Planning&Research Center,Guizhou Power Grid Co.,Ltd.,Guiyang 550000,China)

机构地区：[1]河海大学能源与电气学院,江苏南京211100 [2]贵州电网有限责任公司电网规划研究中心,贵州贵阳550000

出　　处：《电力科学与技术学报》2025年第1期47-54,共8页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(51377046)。

摘　　要：随着新能源发电比例越来越高,其受电网三相不平衡的影响越来越明显,尤其负序超标是导致电力系统安全性降低的重要原因。统一潮流控制器(unified power flow controller,UPFC)具有调节各序电流输出的能力,可用于提升系统的平衡性。为此,首先建立基于解耦-补偿原理的UPFC正序最优补偿潮流算法;其次构建UPFC的负序补偿电流控制模型,将电压不平衡补偿的优化求解问题归结为凸二次约束二次规划(quadratically constrained quadratic programming,QCQP)问题,并采用原-对偶内点法求取UPFC的负序电流最优输出值;最后提出计及正序网损与负序电压指标的负序电压补偿最优潮流(optimal power flow,OPF)计算方法以及区域负序电压总体补偿策略。通过算例分析验证所提出方法的可行性与有效性。With the increasing proportion of renewable energy generation,the impact of grid three-phase imbalance is becoming more and more apparent,especially the excess negative sequence is an important reason for reducing the safety of power systems.The unified power flow controller(UPFC)has the ability to adjust the output of each sequence current,which can be used to improve the balance of the system.Firstly,an optimal compensation algorithm of UPFC for positive-sequence power flow based on the decoupling-compensation principle is established.Secondly,a current control model of UPFC for negative-sequence compensation is constructed,and the optimization problem of voltage imbalance compensation is attributed to the convex quadratically constrained quadratic programming(QCQP).The primal-dual interior point method is used to obtain the optimal output value of the UPFC negative-sequence current.Finally,an optimal power flow calculation method for negative-sequence voltage compensation considering positive-sequence grid loss and negative-sequence voltage index,as well as an overall compensation strategy for regional negative-sequence voltage,are proposed.The feasibility and effectiveness of the proposed method are verified through example analysis.

关 键 词：统一潮流控制器 二次约束二次规划 原-对偶内点法 解耦-补偿法 负序抑制 

分 类 号：TM46[电气工程—电器] TM714