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基于故障仿真分析的高压直流断路器测试要求的确定方法

更新时间:2020-10-29 20:59:18 大小:2M 上传用户:gsy幸运查看TA发布的资源 标签:直流断路器 下载积分:2分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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开发快速、低损耗和可靠的高压直流断路器对直流保护具有重要意义,合适的测试要求是检验直流断路器性能的重要依据。由于直流系统电流没有自然过零点,并且感性元件储存着巨大的能量,使高压直流断路器的测试与交流断路器的测试有着本质的区别。通过对多端高压直流电网中故障电流的详细分析,确定了接地故障发生后的3个阶段,即子模块电容放电阶段、臂电流衰减阶段、交流馈电阶段,讨论了各阶段对故障电流影响较大的关键参数。通过仿真,研究了连接到直流母线的线路数量和故障位置等参数对高压直流电网的影响,为高压直流断路器测试要求的确定提供了依据。

Developing reliable HVDC circuit breakers with fast speed and low loss is of great significance for DC protection. However, because the DC system current does not naturally cross zero,and the inductive element stores a huge amount of energy, the test of HVDC circuit breaker and that of AC circuit breaker have essential differences. Based on the detailed analysis of the fault current in the multi-terminal HVDC power grid,the three stages are determined after the grounding fault, namely the sub-module capacitance discharge stage, the arm current attenuation stage, and AC feed stage. The key parameters that have great influence on the fault current in each stage are discussed. The influence of parameters are studied through simulation, such as the number of lines connected to DC bus and fault location on HVDC power grid, which provides a basis for the determination of HVDC circuit breaker test requirements.

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基于故障仿真分析的高压直流断路器测试要求的确定方法.pdf 2M

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