Coordinative Control Strategy for Power Electronic Transformer with Microgrid Connection

2019 4th Asia Conference on Power and Electrical Engineering

能源学;电工学

Li, Zheng^1 ; Zheng, Tao^1 ; Ma, Hongyue^1 ; Wang, Jiahao^1

Xi'An Jiaotong University, Xi'an

710049, China^1

关键词: Control strategies;    Coordinative controls;    Distributed Energy Resources;    Electrical interface;    Fast convergence;    Frequency domains;    Power electronic transformer;    Power fluctuations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/486/1/012010/pdf
DOI  :  10.1088/1757-899X/486/1/012010

来源: IOP

【 摘 要 】

Power electronic transformer integrates rich forms of electrical interfaces and is able to realize a flexible, accurate and continuous regulation of the network power flow. It's a promising power equipment to act as the 'energy router' in the energy internet, achieving a large-scale access and efficient utilization of distributed energy resources. To solve the DC-bus voltage fluctuation of PET caused by the randomness of the output power of microgrid, a coordinative control strategy between the input stage, isolation stage of PET and the microgrid is proposed. The frequency-domain analysing method is used compare the characteristics of the power fluctuation response under the proposed coordinative control strategy and a traditional control strategy. The simulation results indicate that the proposed control strategy can achieve the stability and fast convergence of DC bus voltage, which proves the correctness and advancement of the coordinative control strategy.