电力系统自动化
電力繫統自動化
전력계통자동화
AUTOMATION OF ELECTRIC POWER SYSTEMS
2014年
4期
32-37
,共6页
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
磁暴%地磁感應電流%集群無功損耗%優化控製%非支配排序遺傳算法%無功優化
자폭%지자감응전류%집군무공손모%우화공제%비지배배서유전산법%무공우화
geomagnetic storm%geomagnetically induced current(GIC)%clustering reactive power loss%optimal control%non-dominant sorting genetic algorithm (NSGA-Ⅱ)%reactive power optimization
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。
磁暴擾動下變壓器集群無功損耗增加，帶來瞭電力繫統的電壓穩定問題。為減小繫統所有接地變壓器因地磁感應電流(GIC)而產生的無功損耗，提齣瞭中性點串接繞組的多變壓器無功損耗控製優化方法。分析瞭磁暴擾動產生GIC和變壓器無功損耗的機理及GIC與接地電阻的關繫，構建瞭變壓器無功損耗和接地電阻值最小的目標函數。根據國傢標準中接地電阻值和繫統穩定運行範圍的規定，製定瞭接地電阻限值和繫統正常運行約束條件，最後利用非支配排序遺傳算法(NSGA-Ⅱ)求解。以GIC標準模型為例，利用所提模型與方法對變壓器 GIC 無功損耗進行優化控製，結果錶明所提方法能夠有效減小磁暴擾動產生的變壓器無功損耗。
자폭우동하변압기집군무공손모증가，대래료전력계통적전압은정문제。위감소계통소유접지변압기인지자감응전류(GIC)이산생적무공손모，제출료중성점천접요조적다변압기무공손모공제우화방법。분석료자폭우동산생GIC화변압기무공손모적궤리급GIC여접지전조적관계，구건료변압기무공손모화접지전조치최소적목표함수。근거국가표준중접지전조치화계통은정운행범위적규정，제정료접지전조한치화계통정상운행약속조건，최후이용비지배배서유전산법(NSGA-Ⅱ)구해。이GIC표준모형위례，이용소제모형여방법대변압기 GIC 무공손모진행우화공제，결과표명소제방법능구유효감소자폭우동산생적변압기무공손모。
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.
