电磁混合式消弧线圈的全补偿故障消弧原理及其柔性控制策略

发布时间：2018-05-14 05:21

本文选题：磁控电抗器 + 有源补偿器　；参考：《电工技术学报》2015年10期

【摘要】：随着非线性负荷和电力电子设备等的大量使用,接地故障电流中的有功和谐波分量大幅增加,仅补偿了无功电流后的残流足以维持电弧,易导致过电压及事故进一步发展。本文提出了基于磁控电抗器(MCR)和有源补偿器(APC)的电磁混合式消弧线圈(EHPC),并详细论述了其两种运行状态和全补偿故障消弧原理。分析了扫频法测量对地电容的影响因素,并提出改进措施。理论推导了中性点位移电压、故障相电压和线路零序电流与接地故障电流各分量之间的关系,提出了针对接地故障电流无功、有功和谐波分量的解耦补偿和柔性控制策略。经仿真分析和实验平台验证,接地故障电流能够得到快速有效的全补偿,达到电流和电压双重消弧,表明了本文所述原理和控制策略的正确性和可行性。
[Abstract]:With the large use of nonlinear load and power electronic equipment, the active power and harmonic components in the grounding fault current are greatly increased, and the residual current after only compensating the reactive current is sufficient to maintain the arc, which can easily lead to the further development of overvoltage and accident. In this paper, the electromagnetic hybrid arc suppression coil EHPCs based on MCRs and APCs are presented, and their two operating states and the principle of fully compensated fault arc suppression are discussed in detail. The influence factors of frequency sweep method on the earth capacitance are analyzed, and the improvement measures are put forward. The relationship among the components of neutral displacement voltage, fault phase voltage and line zero sequence current and grounding fault current is derived theoretically. The decoupling compensation and flexible control strategy for reactive power, active power and harmonic components of grounding fault current are proposed. The simulation analysis and experimental platform verify that the grounding fault current can be fully compensated quickly and effectively, and the double arc suppression of current and voltage is achieved, which shows the correctness and feasibility of the principle and control strategy described in this paper.
【作者单位】：武汉大学电气工程学院;国网浙江桐乡市供电公司;
【分类号】：TM475

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