| 引用本文: | 田宝江,喻劲松,李勇,肖逾男,郭培,刘洋.串补放电限流阻尼装置故障特征研究与保护实现[J].电力自动化设备,2026,46(5):216-224 |
| Tian Baojiang,Yu Jinsong,Li Yong,Xiao Yunan,Guo Pei,Liu Yang.Research on fault characteristics and protection implementation of series capacitor compensation DCLDE[J].Electric Power Automation Equipment,2026,46(5):216-224 |
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| 摘要: |
| 近年来国内外超/特高压串补已发生数次放电限流阻尼装置(DCLDE)故障，因无有效的保护手段，存在DCLDE带故障投运的隐患，甚至可能引发电容器组燃爆等。为此，面向工程应用，开展了DCLDE失效保护研究：基于DCLDE故障机理分析，推导电容器放电电流数学表达式，提取关键故障特征；解析实际故障录波，验证机理分析和关键故障特征的正确性；基于数学表达式和测试参数逼近仿真计算方法，搭建故障设备仿真模型；穷举系统故障叠加DCLDE故障的复杂工况，验证故障特征的普遍性；基于可量化的故障特征，提出DCLDE装置失效保护策略。研发保护软件，实现保护动作误差不超过±5.0%，保护动作时间不超过30 ms；提出试验方法，验证保护的准确性和可靠性。DCLDE失效保护完善了串补保护范畴，可有效提高超/特高压串补运行的可靠性。 |
| 关键词: 放电限流阻尼装置 阻尼电阻 放电限流电抗 阻尼异常放电电流频率 阻尼异常放电电流幅值衰减率 |
| DOI：10.16081/j.epae.202510016 |
| 分类号:TM772 |
| 基金项目:国家电网有限公司总部管理科技项目：超特高压串补二次系统可靠性提升关键技术研究(5100-202424025A-1-1-ZN) |
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| Research on fault characteristics and protection implementation of series capacitor compensation DCLDE |
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Tian Baojiang1, Yu Jinsong2, Li Yong3, Xiao Yunan2, Guo Pei4, Liu Yang2
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1.State Grid Henan Electric Power Co.,Ltd.,Zhengzhou 450000, China;2.China EPRI Science & Technology Co.,Ltd.,Beijing 102200, China;3.Central China Branch of State Grid Corporation of China, Wuhan 430077, China;4.State Grid Henan Electric Power Research Institute, Zhengzhou 450052, China
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| Abstract: |
| In recent years, there have been several failures of discharge current-limiting damping equipment (DCLDE) in extra-high/ultra-high voltage series capacitor compensation(SC) engineering at home and abroad. Due to the lack of effective protection measures, DCLDE is at risk of being put into operation with faults, it may even cause issues such as capacitor bank explosion. For this purpose, research on DCLDE failure protection has been conducted for engineering applications. Based on the failure mechanism of DCLDE, the mathematical formula of capacitor bank discharge current is derived, and the key fault characteristics are extracted. Actual DCLDE fault recording waveforms are analyzed to verify the correctness of the mechanism analysis and key DCLDE fault characteristics. Then, a simulation model of faulty equipment is established based on the mathematical formulas and test parameter approximation simulation calculation method. Various complex operating conditions where power system faults overlap with DCLDE faults are exhaustively simulated to verify the universality of fault characteristics. Based on quantifiable fault characteristics, a DCLDE failure protection strategy is proposed. The protection software is developed, with the protection action error controlled within ± 5.0% and the protection action time limited to less than 30 ms. Experimental methods are proposed to verify the accuracy and reliability of the protection. The DCLDE fai-lure protection expands the scope of SC protection, which effectively improves the operational reliability of extra-high/ultra-high voltage SC systems. |
| Key words: discharge current-limiting and damping equipment damping resistor discharge current-limiting reactor frequency of abnormal damping discharge current amplitude attenuation rate of abnormal damping discharge current |
