Open AccessCoordinative Control Strategy for Power Electronic Transformer with Microgrid Connection
Author(s) -
Li Zheng,
Tao Zheng,
Hang Ma,
Jiahao Wang
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/486/1/012010
Subject(s) - microgrid , router , computer science , correctness , transformer , power control , control engineering , control (management) , power (physics) , control theory (sociology) , voltage , engineering , electrical engineering , computer network , physics , quantum mechanics , artificial intelligence , programming language
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.