按串集成的分布式快速断路器失灵及死区保护系统
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Distributed fast breaker failure and dead zone protection system by string integrated
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    摘要:

    针对超高压交直流混联系统中交流系统断路器失灵及死区故障时间较长,导致直流连续多次换相失败的问题,分析了现有3/2接线交流系统断路器失灵及死区故障隔离时间的组成及其可优化环节,研究了断路器失灵及死区保护优化技术,提出了一种按串集成的分布式快速断路器失灵及死区保护系统。通过优化断路器失灵及死区保护逻辑,同时简化回路、缩短远方跳闸命令的传输时间并改进远方跳闸保护的逻辑,合理缩减了多环节的冗余延时,将断路器失灵及死区故障的隔离时间缩短至200 ms以内。仿真和试验结果表明了理论分析的正确性以及优化策略的有效性。

    Abstract:

    When the AC system occurs breaker failure fault or dead zone fault in Ultra high voltage AC/DC hybrid system, the fault will be isolated after a long time, it can lead to commutation failures and blocking in DC transmission systems. In order to solve this problem, the fault isolating time components as well as the optimized links of breaker failure and dead zone protection in AC system by 3/2 connection are analyzed, and optimization techniques of breaker failure and dead zone protection is researched. It presents one kind of distributed fast failure and dead zone protection system by string integrated. By optimizing the logic of circuit breaker failure and dead zone protection, simplifying the circuit, shortening the transmission time of remote trip command and improving the logic of remote trip protection, reducing the redundant delay of multi-link, it can reduce the breaker failure and dead zone fault isolating time to less than 200 ms. Results of simulation and prototype experiment verify the effectiveness of the proposed theory and control strategy.

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朱晓彤,戴光武,赵青春,刘奎,徐晓春,谢华.按串集成的分布式快速断路器失灵及死区保护系统[J].电力工程技术,2019,38(4):99-105

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历史
  • 收稿日期:2019-01-22
  • 最后修改日期:2019-03-13
  • 录用日期:2018-09-17
  • 在线发布日期: 2019-08-01
  • 出版日期: 2019-07-28