应用于南澳多端柔性直流工程中的高压直流断路器关键技术参数研究

发布时间：2018-06-11 21:01

本文选题：多端柔性直流输电 + 机械式高压直流断路器　；参考：《电网技术》2017年08期

【摘要】：针对在±160k V南澳多端柔性直流输电工程加装2台机械式高压直流断路器进行了研究。首先提出了2台直流断路器的安装方案及意义,分析了机械式高压直流断路器的拓扑及工作原理。然后利用PSCAD/EMTDC建立了含2台机械式高压直流断路器的南澳直流系统仿真模型;通过仿真分析,发现双极短路故障时,为避免过流,在直流断路器开断故障电流前换流器应暂时闭锁;仿真设定机械式高压直流断路器开断时间为5ms,得到了其暂态恢复电压、开断电流、避雷器吸收能量等关键技术参数;研究了开断时间分散性、一台直流断路器故障时对直流断路器参数的影响;最后给出了机械式高压直流断路器关键参数选型的建议。
[Abstract]:This paper studies the installation of 2 Mechanical HVDC circuit breakers in the multi terminal flexible DC transmission project of Nan'ao V. First, the installation and significance of 2 DC circuit breakers are put forward, and the topology and working principle of the mechanical HVDC circuit breaker are analyzed. Then 2 Mechanical HVDC circuit breakers are built with PSCAD/ EMTDC. In order to avoid overcurrent, the converter should be temporarily locked before the fault current is broken by the DC circuit breaker. The simulation set the breaking time of the mechanical high voltage DC circuit breaker to be 5ms, which is key to the transient recovery voltage, the interruption current and the energy absorption of the lightning arrester. Technical parameters are used to study the dispersion of break time and the influence of a DC circuit breaker on the parameters of DC circuit breaker. Finally, the suggestions for selecting key parameters of the mechanical HVDC circuit breaker are given.
【作者单位】：直流输电技术国家重点实验室(南方电网科学研究院);
【基金】：中国南方电网公司重点科技项目(CSGTRC-K163004)~~
【分类号】：TM561;TM721.1

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