克服磁暴的变压器集群无功损耗优化控制方法  

An Optimal Control Method for Overcoming Clustering Transformer Reactive Power Losses Due to Geomagnetic Storm

作　　者：吴伟丽[1,2] 刘连光[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京市102206 [2]伊犁师范学院电子与信息工程学院,新疆维吾尔自治区伊宁市835000

出　　处：《电力系统自动化》2014年第4期32-37,共6页Automation of Electric Power Systems

基　　金：国家科技部国际合作计划资助项目(2010DFA64680);北京市教委中央在京高校共建项目(YB20101007901);新疆维吾尔自治区高校科研计划青年培育基金资助项目(XJEDU2012S39)~~

摘　　要：磁暴扰动下变压器集群无功损耗增加,带来了电力系统的电压稳定问题。为减小系统所有接地变压器因地磁感应电流(GIC)而产生的无功损耗,提出了中性点串接绕组的多变压器无功损耗控制优化方法。分析了磁暴扰动产生GIC和变压器无功损耗的机理及GIC与接地电阻的关系,构建了变压器无功损耗和接地电阻值最小的目标函数。根据国家标准中接地电阻值和系统稳定运行范围的规定,制定了接地电阻限值和系统正常运行约束条件,最后利用非支配排序遗传算法(NSGA-Ⅱ)求解。以GIC标准模型为例,利用所提模型与方法对变压器GIC无功损耗进行优化控制,结果表明所提方法能够有效减小磁暴扰动产生的变压器无功损耗。Clustering transformer reactive power losses due to geomagnetic storm disturbance bring about voltage stability problems in power systems.In order to reduce these reactive power losses generated by grounded transfomers due to geomagnetically induced current （GIC）,this paper proposes a method for optimizing and controlling the multi-transformer reactive power losses by installing series resistors in the neutral point of the transformers.Firstly,the generation mechanism of the GIC and the reactive losses resulting from geomagnetic storm disturbance and the relationship between GIC and grounded resistors are analyzed.Secondly,the objective function of minimizing reactive power losses and grounded resistance are developed.Then the grounded resistance limits and constrains for normal operation of power systems are considered according to the stipulation on grounded resistance and stable operation range of power systems in the national standards.Finally the non-dominant sorting genetic algorithm （NSGA-Ⅱ） is used to solve the model.The GIC Benchmark model is taken as an example to optimize the transformer”s reactive power losses resulting from GIC with the proposed model and method.The results show that the method can effectively reduce the reactive power losses due to geomagnetic storm disturbance.

关 键 词：磁暴 地磁感应电流 集群无功损耗 优化控制 非支配排序遗传算法 无功优化 

分 类 号：TM406[电气工程—电器]