Study on current droop control with damping and inertia
DOI:10.7667/PSPC171667
Key Words:virtual synchronous generator  current droop control  inverter  virtual impedance
Author NameAffiliationE-mail
XUE Xiaofei College of Automation, Beijing Information Science & Technology University, Beijing 100192, China  
LI Hong College of Automation, Beijing Information Science & Technology University, Beijing 100192, China  
LÜ Zhipeng China Electric Power Research Institute, Beijing 100192, China dkylzp@126.com 
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Abstract:The application of virtual synchronous generator algorithm in current droop control is studied for the excellent characteristics of control strategy of virtual synchronous generator. Current droop control method is used to replace the control strategy of the active power/frequency adjustment and reactive power/voltage regulation based on the mathematical model of virtual synchronous generator, reserving the inertia and damping characteristics of the mechanical rotation of the synchronous generator and discarding its stator electrical model, so that the inverter not only has the superior performance of the current droop control, but also owns damping and inertial characteristics of the synchronous generator, and increasing the stability of grid frequency and voltage amplitude. The grid-connected inverter's robustness is enhanced by introducing virtual impedance in voltage/current closed-loop controller. Simulation results verify the feasibility and effectiveness of the proposed control strategy. This work is supported by National Natural Science Foundation of China (No. 11472058).
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