基于电阻耗能支路的MMC-HVDC线路故障清除与重启恢复策略
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TM721.1

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福建省自然科学基金(2017J01480);国网福建省电力有限公司科技项目(52130417000K)


MMCHVDC line fault clearing and restart recovery strategy based on the resistance energyconsuming branch
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    摘要:

    结合直流断路器特性的模块化多电平换流器(MMC)改造是实现直流故障清除经济可行的方案之一,在此背景下,提出一种基于电阻耗能支路的 MMC改造方案。在实施该方案时,通过 MMC与附加端口、线路的电阻耗能支路和关断隔离支路之间的相互配合,实现故障电流快速转移和衰减。此外,该方案利用流过线路电阻耗能支路开关模块的电流,准确判定故障类型,并提出故障线路的重启恢复策略。最后,在 PSCAD 中建立双极直流输电(MMC- HVDC)系统,验证所提方案和故障线路重启恢复策略的有效性。仿真结果表明:所提方案故障清除时间短且故障电流峰值较小,故障线路重启过程平稳可靠。

    Abstract:

    The modular multilevel converter (MMC) modification combined with the characteristics of DC circuit breakers is one of the economical and feasible solutions to realize the DC fault clearing. Under the background, this paper proposes a MMC modification program based on resistance energyconsuming branches. The scheme realizes the rapid transfer and attenuation of the fault current through the mutual cooperation between the MMC and the additional ports and the resistance energy consumption branch of the line and the shutoff isolation branch. In addition, this solution utilizes the current flowing through the switch module of line resistance energyconsuming branch to accurately determine the fault type, and proposes a restart recovery strategy for the faulty line. Finally, a bipolar direct current transmission (MMCHVDC) system is established in PSCAD to verify the effectiveness of the proposed scheme and the restart recovery strategy of faulty lines. The simulation results show that the proposed scheme has a short fault clearing time and a small fault peak value, and the fault line restart process is stable and reliable.

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引用本文

张烜一,江修波,郑文迪,等.基于电阻耗能支路的MMC-HVDC线路故障清除与重启恢复策略[J].电力科学与技术学报,2021,36(6):67-76.
ZHANG Xuanyi, JIANG Xiubo, ZHENG Wendi, et al. MMCHVDC line fault clearing and restart recovery strategy based on the resistance energyconsuming branch[J]. Journal of Electric Power Science and Technology,2021,36(6):67-76.

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  • 在线发布日期: 2022-01-05
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