| 引用本文: | 郭谋发,刘鑫斌,张彬隆,等.故障相桥臂转移接地消弧装置直流侧电压控制方法[J].电力系统保护与控制,2024,52(19):1-14.[点击复制] |
| GUO Moufa,LIU Xinbin,ZHANG Binlong,et al.DC-link voltage control method of a fault phase bridge arm transfer grounding arc suppression device[J].Power System Protection and Control,2024,52(19):1-14[点击复制] |
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| 摘要: |
| 为解决传统三相直挂式柔性消弧装置非故障相桥臂承担线电压的问题，提出一种故障相桥臂转移接地的消弧方法。该方法通过开关控制故障相桥臂转移接地，母线电压由故障相桥臂与非故障相桥臂共同承担，三相桥臂共同输出电流，以实现消弧。针对级联H桥直流侧需独立供电的问题，提出分布式电压平衡换流调制方法。该调制方法根据H桥输出状态和电流方向对直流侧电容充放电的影响，有选择地改变H桥的输出状态，进而实现直流侧电压的稳定。使用该调制方法的消弧装置无须在直流侧配备独立供电电源，在消弧过程中能保持H桥直流侧电压稳定。最后，采用Matlab/Simulink仿真软件对所提方法进行验证，仿真结果证明了所提方法的有效性。 |
| 关键词: 单相接地故障 级联H桥变流器 直流侧电压 消弧 转移接地 |
| DOI：10.19783/j.cnki.pspc.231645 |
| 投稿时间：2023-12-25修订日期：2024-05-29 |
| 基金项目:国家自然科学基金项目资助(51677030)；福建省自然科学基金项目资助(2023J05106) |
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| DC-link voltage control method of a fault phase bridge arm transfer grounding arc suppression device |
| GUO Moufa1,2,LIU Xinbin1,ZHANG Binlong1,2,ZHAO Guojun1,ZHENG Zeyin1,2 |
| (1. College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China; 2. Engineering Research
Center of Smart Distribution Grid Equipment, Fujian Province University, Fuzhou 350108, China) |
| Abstract: |
| There is a problem in that the non-fault phase bridge arm of traditional three-phase direct-hanging flexible arc suppression device bears the line voltage. Thus a fault phase bridge arm transfer grounding arc suppression method is proposed. This method controls the fault phase bridge arm transfer grounding through the switch. The bus voltage is shared by the fault phase bridge arm and the non-fault phase bridge arm, and the three-phase bridge arm outputs the current to achieve arc suppression. The cascaded H-bridge DC-link needs an independent power supply, so a distributed voltage balance commutation modulation method is proposed. The modulation method selectively changes the H-bridge output state according to the influence of H-bridge output state and current direction on the charge and discharge of the DC-link capacitor, and then realizes the stability of DC-link voltage. The arc suppression device using this modulation method does not need to be equipped with an independent power supply on the DC side, and can maintain H-bridge DC-link voltage stability during the arc suppression process. Finally, the proposed method is verified by Matlab/Simulink simulation software, and the results prove the effectiveness of the proposed method. |
| Key words: single-phase-to-ground fault cascaded H-bridge converter DC-link voltage arc suppression transfer grounding |
