基于注入电流调控的含分布式电源配电网消弧与选线方法

杨理斌; 喻锟; 曾祥君; 李理; 王福恒

doi:10.19912/j.0254-0096.tynxb.2022-0028

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太阳能学报 ›› 2023, Vol. 44 ›› Issue (5) : 113-120. DOI: 10.19912/j.0254-0096.tynxb.2022-0028

基于注入电流调控的含分布式电源配电网消弧与选线方法

杨理斌, 喻锟, 曾祥君, 李理, 王福恒

作者信息 +

ARC SUPPRESSION AND LINE SELECTION METHOD FOR DISTRIBUTION NETWORK WITH DISTRIBUTED GENERATION BASED ON INJECTION CURRENT REGULATION

Yang Libin, Yu Kun, Zeng Xiangjun, Li Li, Wang Fuheng

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文章历史 +

摘要

为解决分布式电源（DG）接入中压配电网,导致消弧线圈难以抑制接地故障残流,从而无法实现可靠消弧的问题,分析DG接入对接地故障电流的影响,提出基于注入电流调控的含DG配电网消弧方法。通过有源消弧装置向中性点注入测定电流得到正序网络等效电压源的大小,计算并注入消弧电流,实现接地故障可靠消弧。进一步提出基于零序导纳测量的接地故障选线方法,通过对有源消弧装置和馈线零序导纳的测量,实现接地故障准确选线。PSCAD/EMTDC仿真结果表明,该方法可有效抑制含DG配电网接地故障残流,从而熄灭接地故障电弧,并实现永久性接地故障馈线的准确判别。

Abstract

To solve the problem that the arc suppression coil hardly suppresses the fault residual current and achieves reliable arc suppression when distributed generation （DG） is connected to the medium voltage distribution network, the impact of DG access on the grounding fault current is analyzed, and the arc suppression method based on injection current regulation is proposed. The active arc suppression device injects the metering current into the neutral point to determine the equivalent voltage source of the positive sequence network, calculates and injects the arc suppression current, and realizes reliable arc suppression of grounding fault. Furthermore, a grounding fault line selection method based on zero sequence admittance measurement is proposed. An accurate selection of grounding fault feeders is realized by measuring the zero sequence admittance of active arc suppression devices and the feeders. PSCAD/EMTDC simulation results show that this method can completely suppress the grounding fault current in distribution network with DG, effectively extinguishing the ground fault arc, and accurately identifying permanent ground fault feeders.

导出引用

杨理斌, 喻锟, 曾祥君, 李理, 王福恒. 基于注入电流调控的含分布式电源配电网消弧与选线方法[J]. 太阳能学报. 2023, 44(5): 113-120 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0028

Yang Libin, Yu Kun, Zeng Xiangjun, Li Li, Wang Fuheng. ARC SUPPRESSION AND LINE SELECTION METHOD FOR DISTRIBUTION NETWORK WITH DISTRIBUTED GENERATION BASED ON INJECTION CURRENT REGULATION[J]. Acta Energiae Solaris Sinica. 2023, 44(5): 113-120 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0028

中图分类号： TM77

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