Modeling, Control and Testing of a Voltage-Source-Inverter-Based Microgrid
Microgrids are low-voltage distribution networks comprising various distributed generators (DGs),storage devices,and controllable loads that can operate either interconnected or isolated from the main distribution grid as a controlled entity.This paper concentrates on the modeling and control of a voltage-source-inverter-based microgrid.Considering the dispersion of DGs and loads,the controllers are designed using different control strategies respectively corresponding to the types of the DGs and ways of combining of storage devices.The Power and Voltage Controller coupled with the microsources provides fast response to disturbances and load changes without relying on communications.PQ control can realize the designated control of real and reactive power of DGs according to actual operation situation.V/f control can realize power sharing between different DGs when the load power changes,and provide frequency support when in the islanded mode.With the implementation of the unified controller,the inverter-based microgrid system is able to switch between islanding and grid-connected modes without disrupting connected critical loads.The two control strategies have been verified in simulation using MATLAB/SIMULINK by switching between interconnected and islanded modes.
distributed generation (DG):mircogrid:V/f control PQ control:inverter
Liping Su Guojie Li Zhijian Jin
Key Laboratory of Control of Power Transmission and Conversion,Ministry of Education Shanghai Jiaotong University Shanghai,China
国际会议
威海
英文
724-729
2011-07-06（万方平台首次上网日期，不代表论文的发表时间）