西安交通大学电气工程学院,陕西省西安市 710049
常仲学(1991—),男,通信作者,博士,副教授,博士生导师,主要研究方向:配电网故障处理。E-mail:changzhx@ xjtu.edu.cn
何清余(2000—),女,硕士研究生,主要研究方向:配电网故障处理。E-mail:2195122297@stu.xjtu.edu.cn
宋国兵(1972—),男,博士,教授,博士生导师,主要研究方向:电力系统控制与保护。E-mail:song.gb@mail.xjtu.edu.cn
收稿:2025-01-26,
修回:2025-05-18,
网络首发:2025-07-09,
纸质出版:2025-12-10
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常仲学,何清余,宋国兵.考虑单相断线坠地故障的柔性电压消弧装置投切策略[J].电力系统自动化,2025,49(23):176-185.
CHANG Zhongxue,HE Qingyu,SONG Guobing.Switching Strategy for Flexible Voltage Arc-suppression Device Considering Single-phase Line Breaking and Grounding Faults[J].Automation of Electric Power Systems,2025,49(23):176-185.
常仲学,何清余,宋国兵.考虑单相断线坠地故障的柔性电压消弧装置投切策略[J].电力系统自动化,2025,49(23):176-185. DOI: 10.7500/AEPS20250126005.
CHANG Zhongxue,HE Qingyu,SONG Guobing.Switching Strategy for Flexible Voltage Arc-suppression Device Considering Single-phase Line Breaking and Grounding Faults[J].Automation of Electric Power Systems,2025,49(23):176-185. DOI: 10.7500/AEPS20250126005.
配电网单相断线坠地故障出现的零序电压会使柔性电压消弧装置误启动,装置投入后故障点电流可能增大。首先,分析了单相断线坠地故障零序电压位移轨迹,阐明了典型接地故障选相方法不适用于单相断线坠地故障的原因以及柔性消弧装置误投导致故障恶化的机理。其次,提出了基于相电流突变的接地故障与断线坠地故障区分方法、基于零序差动电流和相电压相位差的单相断线坠地故障类型识别方法,以及考虑单相断线坠地故障的柔性电压消弧装置投切策略。最后,基于PSCAD仿真验证了理论分析的正确性。
The zero-sequence voltage of single-phase line breaking and grounding fault in distribution network will make the flexible voltage arc-suppression device start up by mistake. The current at the fault point may increase after the device is put into operation. Firstly
the trajectory of zero-sequence voltage displacement under single-phase line breaking and grounding faults is analyzed. The reason why the typical phase selection method of grounding fault is not suitable for the single-phase line breaking and grounding faults and the mechanism of fault deterioration caused by mis-switching of flexible arc-suppression device are clarified. Secondly
a method for distinguishing between grounding faults and line breaking and grounding faults based on phase current mutation is proposed. An identification method of single-phase line breaking and grounding fault type based on zero-sequence differential current and phase difference of phase voltage is further proposed. A switching strategy of flexible voltage arc-suppression device considering single-phase line breaking and grounding fault is proposed. Finally
the correctness of the theoretical analysis is verified based on PSCAD simulation.
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