| 引用本文: | 郑涛,王赟鹏,马家璇,宋祥艳.适用于UPFC接入线路的主动注入式故障测距方法[J].电力自动化设备,2022,42(6): |
| ZHENG Tao,WANG Yunpeng,MA Jiaxuan,SONG Xiangyan.Fault locating method based on active injection for transmission lines equipped with UPFC[J].Electric Power Automation Equipment,2022,42(6): |
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| 摘要: |
| 针对统一潮流控制器(UPFC)接入线路场景下传统被动式故障测距方法的精度难以保障的问题，提出基于控制与保护协同思想的主动注入式UPFC接入线路故障测距方法。该方法在接入线路故障隔离后，充分利用基于模块化多电平换流器的统一潮流控制器的高度可控性，将串联侧模块化多电平换流器切换至附加控制模式，向接入线路主动注入特征电压，进而通过单端量的解微分方程算法实现故障测距。所提方法将UPFC作为信号源，向接入线路单侧注入电气信号构建故障测距方程，可解决被动式故障测距方法易受UPFC运行特性和过渡电阻影响的问题，提高故障测距的准确性和可靠性。最后，在PSCAD/EMTDC仿真平台搭建UPFC接入线路模型，仿真结果验证了所提故障测距方法的可行性和有效性。 |
| 关键词: 统一潮流控制器 输电线路 故障测距 主动注入 |
| DOI：10.16081/j.epae.202203018 |
| 分类号:TM77 |
| 基金项目:国家电网公司科技项目(百分百非水可再生能源电网保护适应性分析及新原理研究)(5100-202140339A-0-0-00) |
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| Fault locating method based on active injection for transmission lines equipped with UPFC |
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ZHENG Tao, WANG Yunpeng, MA Jiaxuan, SONG Xiangyan
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State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
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| Abstract: |
| Aiming at the problem that the locating accuracy of the traditional passive fault locating methods is difficult to guarantee in scenario of lines equipped with UPFC(Unified Power Flow Controller),an active injection fault locating method for transmission lines equipped with UPFC based on the idea of coordinated control and protection is proposed. After isolating the fault, the proposed method makes full use of the high controllability of MMC-UPFC(Modular Multilevel Converter based UPFC),switches the MMC(Modular Multilevel Converter) at the series side to the additional control mode, actively injects the characteristic voltage into the transmission line, and then realizes fault locating through the differential equation algorithm based on single-end parameters. The proposed method uses UPFC as the signal source and injects electrical signals into the access line to construct the fault locating equation, which can solve the problem that the passive fault locating method is susceptible to the operation characteristics of UPFC and transition resistances, so the accuracy and reliability of fault locating are ensured. Finally, the model of transmission line equipped with UPFC is built in PSCAD/EMTDC simulation platform and the simulative results verify the feasibility and effectiveness of the proposed fault locating method. |
| Key words: unified power flow controller power transmission line fault locating active injection |
