| 引用本文: | 张 智,徐永海,张世聪,等.直流配电网电能质量指标研究综述[J].电力系统保护与控制,2025,53(03):172-187.[点击复制] |
| ZHANG Zhi,XU Yonghai,ZHANG Shicong,et al.Review of power quality indices of a DC distribution network[J].Power System Protection and Control,2025,53(03):172-187[点击复制] |
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| 摘要: |
| 随着新能源的接入以及直流负荷的可控性和灵活性不断提高，直流配电网展现出广阔的发展前景。大量的分布式电源、敏感设备与电力电子设备的接入对直流配电网的电能质量提出了更严格的要求。介绍了直流配电网的典型接线结构、电压等级范围以及换流器的控制方式。依据已有的参考文献或标准，分析了直流配电网中的电能质量现象扰动机理，提出了更为规范化的直流电能质量指标体系，并将其划分为变化型和事件型。其中变化型包括电压偏差、快速电压变动、电压闪变、电压不平衡和纹波，事件型包括电压暂降、电压中断和过电压。对直流电能质量指标的测量方法和限值要求进行总结和分析。最后，对直流电能质量的指标体系、测量方法和限值要求的未来研究方向进行了展望。 |
| 关键词: 直流配电网 电能质量 指标 限值 测量方法 |
| DOI：10.19783/j.cnki.pspc.240464 |
| 投稿时间：2024-04-16修订日期：2024-07-20 |
| 基金项目:国家电网公司总部科技项目资助(5400- 202258419A-2-0-ZN) |
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| Review of power quality indices of a DC distribution network |
| ZHANG Zhi1,XU Yonghai1,ZHANG Shicong1,FEI Juntao2,ZHENG Xian2,TAO Shun1 |
| (1. School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China;
2. Electric Power Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China) |
| Abstract: |
| With the integration of new energy sources and the continuous improvement of the controllability and flexibility of DC loads, DC distribution networks show broad development prospects. The integration of a large number of distributed power sources, sensitive equipment, and power electronic devices imposes stricter requirements on the power quality of DC distribution networks. This paper introduces the typical wiring structure, voltage level range, and control methods of converters in DC distribution networks. Based on existing references and standards, it analyzes the disturbance mechanisms of power quality phenomena in DC distribution networks and proposes a more standardized DC power quality index system. This system is divided into two types: variation and event. The variation type includes voltage deviation, rapid voltage change, voltage flicker, voltage imbalance, and ripple; the event type includes voltage sag, voltage interruption, and overvoltage. The measurement methods and limit requirements for DC power quality indicators are summarized and analyzed. Finally, the future research directions for the index system, measurement methods, and limit requirements of DC power quality are discussed. |
| Key words: DC distribution network power quality indices limit measuring method |
