直流侧故障对模块化多电平换流器的影响研究

对于直流侧双极性短路故障,首先分析了故障通路对电容闭锁充电以及故障对交流侧功率的影响,然后对如何减少故障对交流侧无功的影响提出了建议。对于直流侧单极接地故障,通过仿真换流站不同接地电阻下,故障对系统稳定性的影响,对接地电阻的选择提供了建议。对于直流侧断线故障,分析了故障发生后控制器的作用,并给出了不同控制方式下,故障对系统稳定性的影响。此外,就双极短路和断线故障后闭锁时刻对系统的影响进行了分析。最后,在PSCAD/EMTDC中建立HBSM-MMC模型验证了分析的正确性。...

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Published in电力系统保护与控制 Vol. 45; no. 10; pp. 48 - 54
Main Author 刘思源 徐东旭 梅念 付颖 刘崇茹
Format Journal Article
LanguageChinese
Published 国网北京经济技术研究院,北京,102209%华北电力大学新能源电力系统国家重点实验室,北京,102206 2017
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ISSN1674-3415
DOI10.7667/PSPC160865

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Summary:对于直流侧双极性短路故障,首先分析了故障通路对电容闭锁充电以及故障对交流侧功率的影响,然后对如何减少故障对交流侧无功的影响提出了建议。对于直流侧单极接地故障,通过仿真换流站不同接地电阻下,故障对系统稳定性的影响,对接地电阻的选择提供了建议。对于直流侧断线故障,分析了故障发生后控制器的作用,并给出了不同控制方式下,故障对系统稳定性的影响。此外,就双极短路和断线故障后闭锁时刻对系统的影响进行了分析。最后,在PSCAD/EMTDC中建立HBSM-MMC模型验证了分析的正确性。
Bibliography:LIU Siyuan1, XU Dongxu2, MEI Nian1, FU Ying1, LIU Chongru2 (1. State Grid Beijing Economic Research Institute, Beijing 102209, China; 2. State Key Lab of New Energy Power System, North China Electric Power University, Beijing 102206, China)
For the DC side bipolar short-circuit fault, firstly, the impact to DC side power and capacitor charging after locking is analyzed, and then the suggestion for reducing the impact of fault on the AC side reactive power is proposed. For the DC side monopole ground fault, simulation results show the impact that the stability of the system is connected with the values of the grounding resistors, and suggestion is proposed in grounding resistor choice. For the DC side disconnection fault, it draws a conclusion for the stability of the system in different control modes. In addition, the impact of the locking time on the system is analyzed. Finally, the correctness of the above analysis is verified by the simulation of a single ended and double ends halfbridge sub-module DC conve
ISSN:1674-3415
DOI:10.7667/PSPC160865