电器与能效管理技术 ›› 2025, Vol. 0 ›› Issue (11): 20-25.doi: 10.16628/j.cnki.2095-8188.2025.11.003

• 配网技术与系统 • 上一篇    下一篇

基于PI-MPC的中压直流配电网自取能电路控制策略研究

周琦1, 张正涛2, 张敬昊2, 张宸宇1, 张亮2   

  1. 1 国网江苏省电力有限公司 电力科学研究院, 江苏 南京 211103
    2 南京工程学院 电力工程学院, 江苏 南京 211167
  • 收稿日期:2025-07-30 出版日期:2025-11-30 发布日期:2025-12-11
  • 作者简介:周 琦(1992—),男,工程师,主要从事直流配电网研究工作。|张正涛(2001—),男,硕士研究生,研究方向为直流配电网技术。|张敬昊(1999—),男,硕士研究生,研究方向为直流配电网技术。
  • 基金资助:
    国网江苏省电力有限公司科技项目(J2023038)

Research on Control Strategy of Self-Powered Circuit in Medium Voltage DC Distribution Network Based on PI-MPC

ZHOU Qi1, ZHANG Zhengtao2, ZHANG Jinghao2, ZHANG Chenyu1, ZHANG Liang2   

  1. 1 Electric Power Science Research Institute, State Grid Jiangsu Electric Power Co.,Ltd., Nanjing 211103, China
    2 School of Electrical Engineering, Nanjing Institute of Technology, Nanjing 211167, China
  • Received:2025-07-30 Online:2025-11-30 Published:2025-12-11

摘要:

中压直流配电网是实现不同类型分布式电源和直流负荷高效互联的组网方式。在全直流高电压应用场景下,针对不依赖外部交流电源给二次设备供电,传统基于互感原理的交流自供电技术难以适用,提出一种高降压比隔离型DC/DC电路。通过模块的输入串联和输出并联(ISOP)实现中压直流配电网二次设备的自供电。同时,为提高电路电压电流的快速动态响应,设计基于PI-模型预测控制(MPC)的双闭环控制策略。最后,开展仿真分析和样机实验验证,结果表明所提电路和控制策略有效提升了系统的动态响应性能。

关键词: 直流配电网, 二次设备自取能, 输入串联输出并联结构, 模型预测控制

Abstract:

The medium voltage DC distribution network is a networking method for efficiently interconnecting different types of distributed power sources and DC loads.In the application scenario of full DC high voltage,aiming at the power supply of secondary equipment without relying on external AC power source, the traditional AC self-powered supply technology based on the mutual inductance principle is difficult to apply.Therefore,a high step-down ratio isolated DC/DC circuit is proposed.The self-powered supply for secondary equipment is realized through module input series and output parallel (ISOP) in medium voltage DC distribution networks.At the same time,a dual closed-loop control strategy based on PI-MPC is designed to improve the fast dynamic response of the voltage and current of the power supply.Finally,simulation analysis and prototype experiments are conducted.The results show that the proposed circuit and control strategy effectively improve the dynamic response performance of the system.

Key words: DC distribution network, secondary equipment self-powered, input series output parallel structure, model predictive control (MPC)

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