微电网中电力电子变压器与储能的协调控制策略
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关键词：微电网 电力电子变压器 储能 虚拟同步电机 中图分类号：TM464
Coordinated Control Strategy of Power Electronic Transformer and Energy Storage in Microgrid
Tu Chunming1 Huang Hong1 Lan Zheng2 Meng Yang1 Xiao Fan1 （1. National Electric Power Conversion and Control Engineering Technology Research Center
协调控制策略
涂春鸣 1 黄 红 1 兰 征 2 孟 阳 1 肖 凡 1
（1. 国家电能变换与控制工程技术研究中心（湖南大学） 长沙 410082 2. 湖南工业大学电气与信息工程学院 株洲 412007）
摘要 微电网可以有效提升电网对分布式能源的消纳能力，以电力电子变压器（PET）为能 量管理核心的新型结构是微电网新的发展方向。提出一种 PET 与储能协调运行的微电网控制策 略，储能的接口变换器采用恒压恒频控制维持微电网电压和频率的稳定，PET 连接微电网的低压 交流接口融合虚拟同步发电机控制，根据储能荷电状态实时调节机械参考功率。储能迅速响应微 电网内功率波动，PET 则通过双向功率调节来维持储能容量稳定，同时保证微电网与电网功率的 “柔性”交换。由于储能和 PET 同时被控制为电压源型接口，其中一个出现故障时微电网仍然可 以平稳运行。微电网运行在此控制策略下，可以保证间歇性分布式能源的最大效率利用，同时提 高微电网运行的稳定性、可靠性和并网友好性。仿真和硬件在环半实物实验结果验证了所提控制 策略的正确性和有效性。
国家自然科学基金资助项目（51577055）。 收稿日期 2018-04-09 改稿日期 2018-05-03
2628
电工技术学报
2019 年 6 月
storage are controlled as voltage sources, the microgrid can still operate stably when one of them fails. The proposed control strategy can ensure the maximum efficiency of intermittent distributed energy resource, and enhance the stability, reliability and friendliness of the microgrid operation. The results of simulation and hardware in loop semi physical experiment verify the correctness and feasibility of the proposed control strategy.
2019 年 6 月 第 34 卷第 12 期
电工技术学报
TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY
DOI: 10.19595/j.cnki.1000-6753.tces.180529
Vol.34 No. 12
Jun.
2019
微电网中电力电子变压器与储能的
Hunan University Changsha 410082 China 2. College of Electrical and Information Engineering Hunan University of Technology
Zhuzhou 412007 wenku.baidu.comhina）
Abstract Microgrid can effectively improve the consumption of grid for the distributed energy resource, and the new development of microgrid is a configuration with power electronic transformer (PET) as its energy management core. Based on this new configuration of microgrid, the paper proposes a coordinated control strategy between of PET and energy storage. To guarantee the fixed voltage and frequency of microgrid, the interface converter of energy storage adopts the constant-voltage constant-frequency (CVCF) control. The low-voltage AC interface converter of PET adopts virtual synchronous generator control to adjust the mechanical reference power in real-time according to the state of charge of energy storage. The energy storage can quickly respond to power fluctuation. The PET can maintain the stability of energy storage capacity through bidirectional power regulation, and ensure the friendly exchange between the microgrid and grid. Moreover, because the PET and energy
Coordinated Control Strategy of Power Electronic Transformer and Energy Storage in Microgrid
Tu Chunming1 Huang Hong1 Lan Zheng2 Meng Yang1 Xiao Fan1 （1. National Electric Power Conversion and Control Engineering Technology Research Center
协调控制策略
涂春鸣 1 黄 红 1 兰 征 2 孟 阳 1 肖 凡 1
（1. 国家电能变换与控制工程技术研究中心（湖南大学） 长沙 410082 2. 湖南工业大学电气与信息工程学院 株洲 412007）
摘要 微电网可以有效提升电网对分布式能源的消纳能力，以电力电子变压器（PET）为能 量管理核心的新型结构是微电网新的发展方向。提出一种 PET 与储能协调运行的微电网控制策 略，储能的接口变换器采用恒压恒频控制维持微电网电压和频率的稳定，PET 连接微电网的低压 交流接口融合虚拟同步发电机控制，根据储能荷电状态实时调节机械参考功率。储能迅速响应微 电网内功率波动，PET 则通过双向功率调节来维持储能容量稳定，同时保证微电网与电网功率的 “柔性”交换。由于储能和 PET 同时被控制为电压源型接口，其中一个出现故障时微电网仍然可 以平稳运行。微电网运行在此控制策略下，可以保证间歇性分布式能源的最大效率利用，同时提 高微电网运行的稳定性、可靠性和并网友好性。仿真和硬件在环半实物实验结果验证了所提控制 策略的正确性和有效性。
国家自然科学基金资助项目（51577055）。 收稿日期 2018-04-09 改稿日期 2018-05-03
2628
电工技术学报
2019 年 6 月
storage are controlled as voltage sources, the microgrid can still operate stably when one of them fails. The proposed control strategy can ensure the maximum efficiency of intermittent distributed energy resource, and enhance the stability, reliability and friendliness of the microgrid operation. The results of simulation and hardware in loop semi physical experiment verify the correctness and feasibility of the proposed control strategy.
2019 年 6 月 第 34 卷第 12 期
电工技术学报
TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY
DOI: 10.19595/j.cnki.1000-6753.tces.180529
Vol.34 No. 12
Jun.
2019
微电网中电力电子变压器与储能的
Hunan University Changsha 410082 China 2. College of Electrical and Information Engineering Hunan University of Technology
Zhuzhou 412007 wenku.baidu.comhina）
Abstract Microgrid can effectively improve the consumption of grid for the distributed energy resource, and the new development of microgrid is a configuration with power electronic transformer (PET) as its energy management core. Based on this new configuration of microgrid, the paper proposes a coordinated control strategy between of PET and energy storage. To guarantee the fixed voltage and frequency of microgrid, the interface converter of energy storage adopts the constant-voltage constant-frequency (CVCF) control. The low-voltage AC interface converter of PET adopts virtual synchronous generator control to adjust the mechanical reference power in real-time according to the state of charge of energy storage. The energy storage can quickly respond to power fluctuation. The PET can maintain the stability of energy storage capacity through bidirectional power regulation, and ensure the friendly exchange between the microgrid and grid. Moreover, because the PET and energy