| 引用本文: | 刘万,尹纯亚,李凤婷,马星.换相失败及恢复过程中整流器消耗无功功率主导因素分析及暂态过电压抑制[J].电力自动化设备,2025,45(2):127-133,149. |
| LIU Wan,YIN Chunya,LI Fengting,MA Xing.Analysis of dominant factors of rectifier reactive power consumption during commutation failure and recovery process and transient overvoltage suppression[J].Electric Power Automation Equipment,2025,45(2):127-133,149. |
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| 摘要: |
| 针对换相失败及恢复过程中影响整流器消耗无功功率的主导因素不明及暂态过电压问题，基于交直流无功交互耦合机理，建立整流器无功消耗量与直流电气量的数学模型，得出在换相失败及恢复期间直流电流的变化对整流器消耗无功功率起主导作用的结论，而直流电压的影响较小且可被忽略。建立直流电流为主导因素的整流侧换流母线电压计算公式，以不超过送端交流系统耐受暂态过电压能力为目标，推导建立了换相失败及恢复过程中整流侧直流电流指令值表达式，提出抑制换相失败恢复过程中暂态过电压的直流控制策略。基于PSCAD/EMTDC平台中的CIGRE标准模型搭建测试系统，验证了不同故障电抗和不同故障持续时间下理论分析的正确性及暂态过电压抑制的有效性。 |
| 关键词: 高压直流输电 送端电网 暂态特性 换相失败 暂态过电压 直流优化控制 |
| DOI：10.16081/j.epae.202410018 |
| 分类号:TM721.1;TM614 |
| 基金项目:国家自然科学基金资助项目(5236070148)；新疆维吾尔自治区自然科学基金资助项目(2022D01C363) |
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| Analysis of dominant factors of rectifier reactive power consumption during commutation failure and recovery process and transient overvoltage suppression |
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LIU Wan1, YIN Chunya1, LI Fengting1, MA Xing2
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1.College of Electrical Engineering, Xinjiang University, Urumqi 830047, China;2.State Grid Xinjiang Electric Power Research Institute, Urumqi 830002, China
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| Abstract: |
| Aiming at the problems of unknown dominant factors affecting rectifier reactive power consumption and transient overvoltage during the commutation failure and recovery process, based on the AC and DC reactive power interactive coupling mechanism, the mathematical models of the rectifier reactive power consumption and DC electrical quantity are established. It is concluded that the change of the DC current plays a dominant role on the rectifier reactive power consumption during the commutation failure and reco-very process, and the influence of the DC voltage is relatively small and can be ignored. The rectifier-side converter bus voltage calculation formula with DC current as the dominant factor is established. With the goal of not exceeding the transient overvoltage capability of the AC system at the sending-end, the expression of the DC current command value at the rectifier side during the commutation failure and recovery process is derived, and the DC control strategy for suppressing transient overvoltage during commutation fai-lure and recovery process is put forward. The test system is built based on the CIGRE standard model in the PSCAD/EMTDC platform to verify the correctness of the theoretical analysis and the effectiveness of transient overvoltage suppression under different fault reactance and different fault durations. |
| Key words: HVDC transmission sending-end power grid transient characteristics commutation failure transient overvoltage DC optimal control |
