地磁暴引起电网电压波动抑制策略

发布时间：2018-01-08 09:22

本文关键词：地磁暴引起电网电压波动抑制策略　出处：《高电压技术》2017年05期 　论文类型：期刊论文

【摘要】：地磁感应电流(geomagnetically induced current,GIC)侵害变压器衍生的无功损耗具有全网同时性的特点,造成整个电网的无功不足与电压波动,可能威胁电网的安全运行。为此,以电压波动和电容器补偿容量最小为目标,计及发电机组无功出力和变压器可调变比约束,将补偿电容器作为无功优化的控制变量,提出了1种基于改进粒子群算法的多目标无功优化策略。20节点算例的仿真计算结果表明:在地电场强度幅值为1 V/km的地电场作用下,电网电压受地磁扰动的影响较大,大负荷下有5个节点电压越过下限值且最小电压幅值标幺值为0.913;通过多目标无功优化后节点电压得到明显改善,比未优化提高了4%,效果较好。所提出的通过调度手段合理制定的多目标无功优化治理方案,能够减轻磁暴灾害对电网的影响,抑制地磁扰动下电网电压的波动,提高电网抗磁暴风险的能力。
[Abstract]:The reactive power loss induced by geomagnetic inductive current (geomagnetically induced current) transformers has the characteristics of full network synchronization. The reactive power shortage and voltage fluctuation of the whole power network may threaten the safe operation of the power grid. Therefore, the minimum voltage fluctuation and capacitor compensation capacity are the targets. Considering the constraints of reactive power output and transformer variable ratio, compensation capacitor is regarded as the control variable of reactive power optimization. A multi-objective reactive power optimization strategy based on improved particle swarm optimization (PSO) is proposed. The simulation results of a 20-node example show that: under the action of geoelectric field with the amplitude of 1 V / km of the geoelectric field. The voltage of the power network is greatly affected by geomagnetic disturbance. Five node voltages cross the lower limit and the minimum voltage amplitude is 0.913 under heavy load. After the multi-objective reactive power optimization, the node voltage is obviously improved, compared with the non-optimization, the effect is better. A multi-objective reactive power optimal control scheme is proposed by means of scheduling. It can reduce the influence of magnetic storm disaster on power grid, restrain the fluctuation of power grid voltage under geomagnetic disturbance, and improve the ability of resisting the risk of magnetic storm.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);内蒙古科技大学信息工程学院;
【基金】：国家自然科学基金(51577060) 国家高技术研究发展计划(863计划)(2012AA121005)~~
【分类号】：TM714.3;TM732
【正文快照】： 0引言1太阳风暴引起地磁场的剧烈扰动称为地磁暴, 地磁暴的地磁扰动(geomagnetic disturbance,GMD)影响电力系统的正常运行已得到了人们的普遍认可[1]。其影响机理就是GMD能够在地球表面感应出准直流电压,该准直流电压在输电线路、两端接地变压器与大地构成的回路产生地磁感

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