直流配电网电压控制技术综述
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国家重点研发计划资助项目(2018YFB0904700)


A review on voltage control strategies in DC distribution network
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National Key Research and Development Program of China (No. 2018YFB0904700); Science and Technology Project of State Grid Jiangsu Electric Power Co,Ltd(No. SGJSDK00ZPJS1900271)

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    摘要:

    随着分布式可再生能源的快速发展以及电动汽车、数据中心等大量直流负荷的普及,交流配电网的运行和管理受到了挑战。直流配电系统潮流灵活可控,可闭环运行,供电方式多样,具有更广阔的应用前景。但是,相比交流系统的控制,直流配电系统的控制更加复杂。直流电压作为衡量直流配电网有功功率平衡的唯一指标,其稳定控制对直流配电网的可靠运行至关重要。文中首先列举了直流配电网的典型拓扑结构和直流电压等级序列;然后,总结了直流配电网中关键设备电力电子变流器的控制技术;接着,梳理了直流配电网的传统电压控制策略,并对目前一些改进的直流电网电压控制策略进行了深入分析和总结。最后,指出了直流配电网电压控制需要重点关注和解决的问题,可为未来直流配电网直流电压控制的进一步研究提供思路和借鉴。

    Abstract:

    With the rapid development of distributed renewable energy and the popularization of DC loads such as electric vehicles and data centers, the operation and management of AC distribution networks are confronted with challenges. DC power distribution system has a broad application prospect because of its flexible and controllable power flow, closed loop operation and various power supply modes. However, compared with the control of AC system, the control of DC distribution system is more complicated. As the only indicator to measure the active power balance of DC distribution network, the stability control of DC voltage is very important to the reliable operation of DC distribution system. Firstly, the typical topology structure and the DC voltage levels of DC distribution system is introduced. Secondly, the control technology of power electronic converter of key equipment in DC distribution network is introduced. Then, the traditional voltage control strategies of DC distribution network are sorted out, and some improved voltage control strategies of DC distribution network are deeply analyzed and summarized. Finally, it looks forward to and points out the problems that need to be paid attention to and solved in DC distribution network voltage control. Ideas and references for further research on DC voltage control in DC distribution network are provided.

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吴在军,谢兴峰,杨景刚,司鑫尧,杨媛平,曹骁勇.直流配电网电压控制技术综述[J].电力工程技术,2021,40(2):59-67

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  • 收稿日期:2020-09-07
  • 最后修改日期:2020-10-13
  • 录用日期:2021-01-16
  • 在线发布日期: 2021-04-02
  • 出版日期: 2021-03-28