| 引用本文: | 江 浪,窦真兰,尹项根,等.基于电能路由器的新型配电系统接地故障柔性降压消弧[J].电力系统保护与控制,2025,53(19):1-12.[点击复制] |
| JIANG Lang,DOU Zhenlan,YIN Xianggen,et al.Flexible voltage arc suppression for single line-to-ground fault in distribution systems based on power routers[J].Power System Protection and Control,2025,53(19):1-12[点击复制] |
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| 摘要: |
| 配电网电缆化程度越来越高，导致线路单相接地故障消弧困难。为此，针对含电能路由器(power router, PR)并入的新型配电网，提出了基于PR的配电网单相接地故障柔性降压消弧新方法。首先，提出高压级直流侧接地的模块化多电平换流器(modular multilevel converter, MMC)型PR拓扑。在dq0同步旋转坐标系下，采用比例积分谐振(proportional integral resonance, PIR)控制器无静差跟踪零轴矢量，实时调控系统零序电压与故障相电源电动势幅值相等、相位相反，抑制故障相电压使其降至故障点重燃弧电压以下，实现接地故障主动降压消弧。然后，通过控制系统零序电压线性减小，观测系统零序电流随零序电压线性变化与否，判定是否为瞬时故障。考虑了多种故障工况，在MATLAB/Simulink仿真中，故障相电压可降到约10 V。进一步开展了实物系统平台实验，验证了基于PR的柔性降压消弧方法的有效性和可靠性。 |
| 关键词: 消弧 配电网 接地故障 电能路由器 新型电力系统 |
| DOI：10.19783/j.cnki.pspc.241514 |
| 投稿时间：2024-11-11修订日期：2025-02-21 |
| 基金项目:国家自然科学基金(重点项目)资助(52337006) |
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| Flexible voltage arc suppression for single line-to-ground fault in distribution systems based on power routers |
| JIANG Lang1,DOU Zhenlan2,YIN Xianggen1,CHEN Wei1,LAI Jinmu3,CHEN Junhong3,WEN Minghao1,HAN Xiao1 |
| (1. School of Electrical and Electronic Engineering, State Key Laboratory of Advanced Electromagnetic Technology, Huazhong
University of Science and Technology, Wuhan 430074, China; 2. State Grid Shanghai Municipal Electric Power Company,
Shanghai 200023, China; 3. School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou 450001, China) |
| Abstract: |
| With the increasing use of cables in distribution networks, it has become more difficult to extinguish arcs in single line-to-ground (SLG) faults. To address this, a novel and flexible voltage arc suppression technique for SLG faults in distribution networks based on power routers (PR) is proposed. First, a modular multilevel converter (MMC)-based PR topology with a grounded high-voltage DC is introduced. A proportional integral resonance (PIR) controller in the dq0 synchronous rotating frame (SFR) is applied to track the zero-axis vector without steady-state error. This enables real-time regulation of the system zero-sequence voltage so that it matches the magnitude but opposes the phase of the power source electromotive force of the faulty phase. As a result, the fault phase voltage is suppressed below the arc reignition voltage at the fault point, achieving active voltage arc suppression for grounding faults. Then, by precisely controlling the linear reduction of the system zero-sequence voltage and observing whether the zero-sequence current varies linearly with it, the method can determine whether the fault is transient. Considering various fault conditions, MATLAB/Simulink simulations show that the fault phase voltage can be reduced to about 10 V. Further experiments on a physical system platform verify the effectiveness and reliability of the proposed PR-based flexible voltage arc suppression method. |
| Key words: arc suppression distribution network grounding fault power router new type power system |
