基于多交流端口级联型电力电子变压器的配电网柔性合环方案

李倩; 赵军愉; 王胜楠; 谢思哲; 徐永海; 闻宪

李倩,赵军愉,王胜楠,谢思哲,徐永海,闻宪.基于多交流端口级联型电力电子变压器的配电网柔性合环方案[J].电测与仪表,2025,62(7):117-127.
LI Qian,ZHAO Junyu,WANG Shengnan,XIE Sizhe,XU Yonghai,WEN Xian.Flexible loop-closing scheme for distribution network based on cascaded power electronic transformers with multiple-AC-ports[J].Electrical Measurement & Instrumentation,2025,62(7):117-127.

基于多交流端口级联型电力电子变压器的配电网柔性合环方案

Flexible loop-closing scheme for distribution network based on cascaded power electronic transformers with multiple-AC-ports

DOI：j.issn1001-1390.2025.07.014

中文关键词: MAC-CHB-PET 交流柔性合环有功无功协调控制负荷转供

英文关键词:MAC-CHB-PET, AC flexible loop-closing, coordinated control of active and reactive power, load transfer

基金项目:国网河北省电力有限公司科技项目（kjcb2023-006）

作者中文名	作者英文名	单位
李倩	LI Qian	国网河北省电力有限公司
赵军愉	ZHAO Junyu	国网河北省电力有限公司保定供电分公司
王胜楠	WANG Shengnan	国网河北省电力有限公司保定供电分公司
谢思哲	XIE Sizhe	国网河北省电力有限公司保定供电分公司
徐永海	XU Yonghai	华北电力大学
闻宪	WEN Xian	华北电力大学

摘要点击次数: 8

中文摘要:

为保证工业生产和居民用电对电能质量和供电可靠性的高要求，配电网不停电合环负荷转供的研究具有重要意义。目前配电网合环通常需要借助额外的装置，存在经济性较差等问题，近年来，基于多交流端口电力电子变压器的研究逐渐得到关注并已实际应用，针对该应用场景以及不停电合环负荷转供需求，可基于电力电子变压器不同端口的控制实现柔性合环，拓展其应用功能。文中提出了基于多交流端口级联型电力电子变压器(multiple-AC-ports cascaded H-bridge type power electronic transformer, MAC-CHB-PET)的交流柔性合环方案。首先介绍了MAC-CHB-PET的结构；然后分析了合环冲击电流和合环稳态电流产生的内在机理，并根据选取的特征因素提出了一种基于MAC-CHB-PET合环调节的功率指令值计算方法；进而提出了不停电负荷转供的交流柔性合环方案，基于MAC-CHB-PET采用两个交流端口有功功率和无功功率的协调控制进行交流母线电压调节，实现交流柔性合环；最后建立仿真模型，验证了所提出交流柔性合环方案的可行性。

英文摘要:

The research on uninterrupted loop load transfer in distribution networks is of great significance to ensure the high requirements for power quality and supply reliability in industrial production and residential electricity. At present, the loop-closing of the distribution network usually requires the use of additional devices, which has problems such as poor economic efficiency. In recent years, the research on power electronic transformers based on multiple AC ports has gradually attracted attention and has been put into practical application. For this application scenario and the demand for uninterrupted loop load transfer, flexible loop-closing can be achieved based on the control of different ports of power electronic transformers to expand its application functions. This paper proposed an AC flexible loop- closing scheme based on a multiple-AC-ports cascaded H-bridge type power electronic transformer (MAC-CHB-PET). Firstly, the structure of MAC-CHB-PET was analyzed; Then, the internal mechanisms of the impulse current and steady-state current generated during loop-closing were analyzed, and a power command value calculation method based on MAC-CHB-PET loop-closing regulation was proposed based on the selected characteristic factors; Furthermore, the AC flexible loop-closing scheme for uninterrupted load transfer was proposed, based on MAC-CHB-PET, which used coordinated control of active and reactive power at two AC ports to regulate the AC bus voltage and achieve AC flexible loop-closing; Finally, a simulation model was established to verify the feasibility of the proposed AC flexible loop-closing scheme.

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