| 级联型电力电子变压器分级解耦控制 |
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| 引用本文： | 魏星,朱信舜,袁宇波,周启文,葛雪峰,杨晨. 级联型电力电子变压器分级解耦控制[J]. 电力系统自动化, 2021, 45(8): 194-199. DOI: 10.7500/AEPS20200227015 |
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| 作者姓名： | 魏星 朱信舜 袁宇波 周启文 葛雪峰 杨晨 |
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| 作者单位： | 南京南瑞继保电气有限公司,江苏省南京市 211002;国网江苏省电力有限公司电力科学研究院,江苏省南京市 210003;南京南瑞继保电气有限公司,江苏省南京市 211002;南瑞集团有限公司(国网电力科学研究院有限公司),江苏省南京市 211106 |
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| 基金项目： | 国家重点研发计划资助项目(2017YFB0903300)。 |
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| 摘 要： | 应用于交直流混合配电网的级联型电力电子变压器(PET)能够实现柔性互联、电压变换、电气隔离和功率控制等多种功能.由于级联型PET内部的级联H桥级和双有源桥级之间电气耦合程度高且控制目标不同,提出一种分级解耦控制方案,在简化控制架构的同时可实现各级的独立灵活控制.此外,针对级联型PET采用多个功率单元输入串联输出并联的拓...
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| 关 键 词： | 交直流配电网 电力电子变压器 级联型变换器 分级解耦 串联均压 并联均流 |
| 收稿时间： | 2020-02-27 |
| 修稿时间： | 2020-04-21 |
Hierarchical Decoupling Control of Cascaded Power Electronic Transformer |
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| WEI Xing,ZHU Xinshun,YUAN Yubo,ZHOU Qiwen,GE Xuefeng,YANG Chen. Hierarchical Decoupling Control of Cascaded Power Electronic Transformer[J]. Automation of Electric Power Systems, 2021, 45(8): 194-199. DOI: 10.7500/AEPS20200227015 |
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| Authors: | WEI Xing ZHU Xinshun YUAN Yubo ZHOU Qiwen GE Xuefeng YANG Chen |
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| Affiliation: | 1.NR Electric Co., Ltd., Nanjing 211102, China;2.Electric Power Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China;3.NARI Group Corporation (State Grid Electric Power Research Institute), Nanjing 211106, China |
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| Abstract: | Cascaded power electronic transformer (PET) for hybrid AC/DC distribution networks can realize multiple functions such as flexible interconnection, voltage conversion, electrical isolation and power control. Due to the high degree of electrical coupling between the cascaded H-bridge and the dual active bridge stage in the cascaded PET with different control objectives, a hierarchical decoupling control scheme is proposed to simplify the control architecture and achieve independent flexible control at all levels. Since the topology of cascaded PET adopts input-series output-parallel (ISOP) of multiple power units, a control strategy of series voltage equalization and parallel current equalization based on hierarchical decoupling control is proposed to reduce the influence of parameter differences. A cascaded PET with rated AC voltage of 10 kV, rated DC voltage of 750 V and rated capacity of 500 kVA is developed, and the experimental results verify the feasibility and effectiveness of the engineering application of the control scheme. |
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| Keywords: | AC/DC distribution network power electronic transformer cascaded converter hierarchical decoupling series voltage equalization parallel current equalization |
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