基于谐波电压补偿的混合直流连续换相失败抑制策略
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TM721

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中国南方电网有限责任公司科技项目(090000KK52170161)


Control strategy to suppress hybrid HVDC continuous commutation failure by harmonic voltage compensatio
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    摘要:

    针对混合直流发生连续换相失败的现象,首先对直流换相过程和连续换相失败进行了分析,确定了该试验工况下谐波是直流在故障恢复期间发生连续换相失败的原因之一。接着基于含模块化多电平柔性直流输电(MMC-HVDC)的多馈入直流输电系统仿真模型,提出抑制直流连续换相失败的策略,通过对多条常规高压直流输电(LCC-HVDC)恢复期间逆变侧换流母线谐波电压的检测,在MMC-HVDC逆变侧的无功功率控制环节附加上谐波电压补偿分量,可提高恢复期间MMC-HVDC对交流系统的无功功率支撑,减少谐波的影响,从而抑制连续换相失败的发生。最后基于PSCAD/EMTDC平台仿真验证了该换相失败抑制策略的有效性。

    Abstract:

    In view of the failure of continuous commutation of hybrid HVDC in the experiment, the of commutation process and continuous commutation failure of HVDC are analyzed firstly. Under this test condition, harmonic is one of the reasons for the continuous commutation failure of HVDC during restoration. Then the control strategy to suppress hybrid HVDC continuous commutation failure by harmonic voltage compensation is proposed. The harmonic voltage compensation component is added to the link to improve the reactive power support of the MMC-HVDC to the AC system during recovery. The reactive power control on the inverter side of the MMC-HVDC can help reduce the influence of harmonics, thereby suppressing the continuous commutation failure, the reliability and stability of MIDC Transmission System with MMC-HVDC is enhanced. At last, the effectiveness of coordinated control strategy is verified on PSCAD/EMTDC under the same test condition.

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何晓峰,李成翔,夏成军,程韧俐,姚文峰,黄东启.基于谐波电压补偿的混合直流连续换相失败抑制策略[J].电力工程技术,2019,38(4):112-117

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  • 收稿日期:2019-01-11
  • 最后修改日期:2019-03-13
  • 录用日期:2019-05-15
  • 在线发布日期: 2019-08-01
  • 出版日期: 2019-07-28
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