基于粒子群算法的变压器直流偏磁隔直装置安装策略  

Installation Strategy of Transformer DC Bias Blocking Device Based on PSO Algorithm

作　　者：李星成 鞠善忠 郑太英 LI Xingcheng;JU Shanzhong;ZHENG Taiying(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学电气工程学院,杭州310027

出　　处：《南方电网技术》2023年第10期13-21,41,共10页Southern Power System Technology

基　　金：国家重点研发计划智能电网技术与装备重点专项(2016YFB0900605)。

摘　　要：直流输电系统在单极大地回线的运行方式下直流接地极附近变压器会产生直流偏磁。对单个变电站安装隔直装置可能导致周边变电站产生新的直流偏磁。考虑到隔直装置的安装运维成本高、变电站改造困难等问题,对直流接地极周边全部变电站均安装隔直装置是不合理的。为此,提出了一种基于粒子群算法的变压器直流偏磁隔直装置安装策略,能够综合考虑成本与治理效果。首先建立以安装维护成本和变压器中性点电流值加权作为优化目标函数的安装策略优化模型,再以所有变压器中性点直流电流均不超限作为约束条件,最后采用粒子群算法获得最优安装策略。为了验证所提出的安装策略的有效性,搭建了金华电网实际参数模型,并考虑了多组变电站的综合成本和重要等级等参数。结果证明基于粒子群算法的直流偏磁隔直装置安装策略能够快速有效地得到区域电网内各变电站隔直装置最佳配置方案。When high voltage direct current(HVDC)transmission system works in mono-polar operation mode,DC bias will occur in the transformers near the grounding polar.The installation of a blocking device in a single station may cause new DC bias in the other adjacent stations.Considering the high installation and operation cost of the blocking device and the difficulty of substation transformation renovation,it is unreasonable to install the blocking device in all substations around the DC grounding electrode.Therefore,the installation strategy of DC bias blocking devices based on particle swarm optimization(PSO)that considers the cost and the treatment effect is proposed.Firstly,an optimization model of a capacitor DC blocking device is established with the installa⁃tion and maintenance cost and the weighting of the transformer neutral point current as the optimization objective function,and the DC currents at all transformer neutral points are not exceeded as the constraint condition.Finally,the particle swarm algorithm is used to obtain the optimal installation strategy.To verify the effectiveness of the proposed installation strategy,the actual parameter model of the Jinhua Power Grid is constructed,considering different parameters such as the comprehensive costs and importance.The results show the installation strategy of DC bias blocking devices based on the PSO algorithm can quickly and effectively obtain the optimal configuration scheme of the blocking devices of all the substations in the regional power grid.

关 键 词：直流偏磁 多目标优化 粒子群算法 电容隔直装置 

分 类 号：TM721[电气工程—电力系统及自动化]