Control Strategy of Micro Grid Converters with Synchronous Generator Characteristic
Zhang Yuzhi1, 2, Zhang Hui1, 2, He Dawei1, Su Bing1, Chai Jianyun3
1. Xi’an University of Technology Xi’an 710048 China; 2. State Key Laboratory of Electrical Insulation and Power Equipment Xi’an 710049 China; 3. Department of Electrical Engineering,Tsinghua University, Beijing 100084 China
Abstract：With the help of energy storage, synchronous generator model used in conventional power system being applied in renewable energy generation is called virtual synchronous generator (VSG) and presented in this paper. Through designing prime motor controller and excitation controller , renewable energy station with VSG can obtain the well-known frequency and voltage drooping mechanisms, and mimics a characteristic of system dynamic performance influenced by rotor inertia. It can solve the problems of low output impedance and low damp on conventional power converter, and improve the stability of renewable power generation system. The simulation and experimental results show that the proposed VSG algorithm is suitable to micro grid.（The simulation and experimental results show that the proposed VSG can simulate the characteristics of real synchronous generator.）
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2014, Vol. 29 
