青海电力QINGHAI ELECTRIC POWER第40卷第3期2021年9月Vol. 40 No. 3Sep.,202124DOI ：10. 15919/j. cnki. qhep. 2021.03. 001并联混合直流系统无功控制研究闫 涵,王少飞，刘可，李东升,赵焕蓿(国网青海省电力公司电力科学研究院，青海 西宁810003)摘 要：并联混合直流系统采用常规直流和柔性直流并联结构,综合了常规直流和柔性直流各自的优势。
在高压直流输电系统现有无功控制的基础上，创新性地提出了并联混合直流输电系统无功协调控制策略。
首先分别研究换流站慢速无功控制和柔性直流单元快速无功控制;继而针对常规直流馈入弱交流系统存在的电 压不稳定问题，提出一种换流站无功补偿装置与柔性直流单元的无功协调控制策略;最后基于PSCAD/EMT-DC 仿真平台，搭建并联混合交直流仿真系统,分别就稳态及暂态情况下的无功协调控制策略进行仿真分析。
分析结果表明，无功协调控制策略稳态时能够抑制换流母线电压波动，受端电网故障时能够抑制常规直流单 元换相失败，提高其故障恢复能力。
论证了并联混合直流系统无功协调控制策略的有效性。
关键词：柔性直流快速无功控制；无功分组配置；换相失败；无功协调控制中图分类号：TM721.1；TM761 + .l 文献标志码：A文章编号：1006 -8198(2021)03 -0001 -06Study on the Reactive Power Coordinated Control inHybrid Parallel HVDC SystemYAN Han, WANG Shaofei, LIU Ke, LI Dongsheng ZHAO HuanbeiAbstract : The hybrid parallel HVDC system adopts the parallel structure of LCC -HVDC and MMC -HVDC , whichcombines the advantages of LCC -HVDC and MMC -HVDC. Based on the existing reactive power control of HVDC system , the reactive power coordination control strategy of hybrid parallel HVDC system is proposed innovatively.Firstly , the reactive power control of LCC - HVDC and the reactive power control of MMC - HVDC are studied respectively. Then a reactive power coordinated control strategy between converter station reactive power compensationdevice and MMC -HVDC is proposed aiming at the voltage instability when the LCC -HVDC inputs to weak AC system. Finally , a hybrid parallel HVDC system is built based on the PSCAD / EMTDC simulation platform. And the reactivepower coordination strategies under steady and transient conditions are respectively simulated and analyzed. The analysis results show that the reactive power coordinated control strategy can suppress the voltage fluctuation ofconverter bus in steady state. At the same time , the reactive power coordinated control strategy can restrain the commutation failure of LCC - HVDC in the fault of receiving power grid and improve its fault recovery ability. Therefore , the effectiveness of reactive power coordinated control strategy in hybrid parallel HVDC system isdemonstrated.Keywords : fast reactive power control of MMC -HVDC ； reactive power grouping allocation ； commutation failure ；reactive power coordination control收稿日期：2021 -06-27；修回日期：2021 -08 -26作者简介：闫 涵（1994）,女，硕士，工程师，主要研究方向为高压直流输电技术运行分析与控制。
基于改进遗传算法的配电网无功优化
张华;郝建奇
【期刊名称】《电气技术》
【年(卷),期】2012(000)006
【摘要】本文在分析了电网安全经济运行现状的基础上,阐明了配电网无功优化的必要性,提出了以节省损耗电费最大为目标的无功优化数学模型,并基于传统遗传算法,提出了一种改进的遗传算法对无功优化模型进行求解：采用十进制编码、最优个体保存策略以及变异操作采用十进制码加减变异范围内随机数操作。
最后将本算法用于某14节点电网系统中,结果表明,本文算法在优化效果基本相同的情况下,还具有迭代次数少,计算速度快等优点,具有重要的现实应用价值。
【总页数】5页(P28-31,68)
【作者】张华;郝建奇
【作者单位】陕西省地方电力有限公司,西安710061;陕西省地方电力有限公司,西安710061
【正文语种】中文
【中图分类】TM744
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2007年12月Power System Technology Dec. 2007 文章编号：1000-3673（2007）23-0068-06 中图分类号：TM714 文献标识码：A 学科代码：470·4051基于数学形态学和遗传算法的配电网动态无功优化方法姜振超，杨洪耕（四川大学电气信息学院，四川省成都市 610065）A Mathematical Morphology and Genetic Algorithm BasedDynamic Reactive Power Optimization Method for Distribution NetworkJIANG Zhen-chao，YANG Hong-geng（School of Electrical Engineering & Information，Sichuan University，Chengdu 610065，Sichuan Province，China）ABSTRACT: A mathematical morphology and genetic algorithm based dynamic reactive power optimization method for distribution network is proposed. By means of constructing mathematical morphology filter, the binary image composed by allelic genes of chromosome is filtered and the problem that deals with the action times of voltage regulating devices for compensation is turned into filtering problem of discrete binary image. To quicken the calculation speed of genetic algorithm, the chiasma operation and mutation operation are improved; based on the thinking of inheritable character, the destruction of fine gene combination during chiasma operation is prevented; drawing lessons from the thinking of modifying individual speed and position in the light of individual extremum and global extremum in particle swarm optimization (PSO) algorithm, an evolutional mutation method based on gene character is put forward. Taking the reactive power optimization of a regional distribution network for example, the reactive power optimization is carried out by improved genetic algorithm, simple genetic algorithm and the proposed dynamic reactive power optimization respectively, optimization results show that the proposed dynamic reactive power optimization method is efficient and correct.KEY WORDS:distribution network；dynamic optimization；mathematical morphology；genetic algorithm；action times；evolutional mutation摘要：提出了一种基于数学形态学和遗传算法的配电网动态无功优化方法，通过构造数学形态学滤波器对由染色体的等位基因构成的二值图像进行滤波，将对补偿调压设备动作次数的处理问题转化为离散二值图像的滤波问题。
