特高压磁控式并联电抗器保护配置方案及其性能分析

发布时间：2018-12-12 16:36

【摘要】：可控高抗安全运行关系到系统的无功平衡和电压稳定,对保护要求甚高。磁控式可控高抗不仅包括网侧绕组,还设有控制绕组和补偿绕组,其本体保护配置较其他类型的可控高抗更为复杂,相关研究成果鲜有报道。基于一种在我国西北地区已实际投运的特高压磁控式并联电抗器的本体结构,对其本体保护配置进行了深入探讨,结合工程经验指出了传统保护应用于磁控式可控高抗存在的问题并给出了解决方案。介绍了网侧绕组和补偿绕组的保护配置情况及相关注意事项,详细分析了控制绕组各类故障的故障特征,提出以直流母线过电压保护作为控制绕组接地故障的主保护,同时指出传统零序功率方向保护应用于控制绕组匝间和相间故障时灵敏度不足,宜采用负序功率方向保护。
[Abstract]:The safe operation of controllable high resistance is related to the reactive power balance and voltage stability of the system, and the protection requirement is very high. The magnetron controllable high reactance not only includes the network winding, but also has the control winding and the compensation winding. The configuration of its body protection is more complex than that of other types of controllable high reactance. Based on the body structure of an UHV magnetically controlled shunt reactor which has been put into operation in Northwest China, the configuration of its body protection is discussed. Combined with engineering experience, the problems existing in the application of traditional protection to magnetically controlled high reactance are pointed out and the solutions are given. This paper introduces the protection configuration of grid-side windings and compensation windings and the relevant matters needing attention, analyzes in detail the fault characteristics of various kinds of faults of control windings, and puts forward that DC busbar overvoltage protection is the main protection for grounding faults of control windings. At the same time, it is pointed out that the sensitivity of the traditional zero-sequence power directional protection applied to the inter-turn and inter-phase faults of the control windings is insufficient, so the negative sequence power directional protection is suitable.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);
【基金】：国家高技术研究发展计划项目(863计划)(2012AA050-208)~~
【分类号】：TM472

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