| 引用本文: | 吴健颖,彭茂兰,武霁阳,冯雷.兴安直流工程交直流系统谐振影响因素分析及其抑制措施[J].电力自动化设备,2023,43(2): |
| WU Jianying,PENG Maolan,WU Jiyang,FENG Lei.Analysis on influencing factors and its countermeasure of resonance of AC/DC system in Xing’an DC project[J].Electric Power Automation Equipment,2023,43(2): |
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| 摘要: |
| 针对兴安直流工程出现的谐振放大问题，研究了谐振抑制机理。基于同时考虑送、受端交流系统和直流系统的阻抗等值网络，通过频率扫描法研究等值网络的阻抗特性和谐振抑制稳定性，结果证实兴安直流工程交直流系统在特定频率附近存在谐振风险，与暂态仿真结果和现场振荡现象一致。对直流振荡特性的影响因素进行了仿真分析，提出改造直流侧网络阻抗的谐振抑制方法。仿真结果验证了所提策略对谐振抑制的有效性。最后，将所提策略应用于兴安直流工程，典型运行方式下未再出现谐振现象。 |
| 关键词: 常规直流输电 稳定性分析 阻抗扫描 谐振抑制 |
| DOI：10.16081/j.epae.202207011 |
| 分类号:TM721.1 |
| 基金项目: |
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| Analysis on influencing factors and its countermeasure of resonance of AC/DC system in Xing’an DC project |
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WU Jianying, PENG Maolan, WU Jiyang, FENG Lei
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Maintenance & Test Center, EHV Power Transmission Company of China Southern Power Grid Co.,Ltd.,Guangzhou 510663, China
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| Abstract: |
| Aiming at the problem of resonance amplification in Xing’an direct current(DC) project, the mechanism of resonance suppression is studied. Based on simultaneously considering the impedance equivalent network of sending-end and receiving-end alternating current(AC) systems and DC system, the impedance characteristics and resonance suppression stability of the equivalent network are studied by frequency scanning method. The results show that there is resonance risk nearby a specific frequency in the AC/DC system of Xing’an DC project, which is consistent with the transient simulative results and resonance suppression phenomena of the testing ground. The influencing factors of the DC oscillation characteristics are simulated and analyzed, and a resonance suppression countermeasure of changing DC-side network impedance is proposed. Simulative results verify the effectiveness of the proposed strategy for resonance suppression. Finally, the strategy is applied in the Xing’an DC project, and the resonance phenomenon does not appear in typical operation modes. |
| Key words: LCC-HVDC stability analysis impedance scan resonance suppression |
