ADAPTIVE OPTIMIZATION AND EXIT MECHANISM DESIGN OF FREQUENCY MODULATION CONTROL PARAMETERS FOR ENERGY STORAGE
In order to solve the problem of frequency stability caused by improper setting of energy storage control parameters and difficult balance between energy storage frequency modulation effect and cycle life.This paper proposes a method of adaptive optimization of energy storage frequency modulation control parameters and design of exit mechanism.Firstly,the influence of energy storage droop and virtual positive(negative)inertia coefficient on the dynamic performance and stability of the system frequency is analyzed,and the stable variation range of parameters is obtained.Then,according to the stable variation range of control parameters,a fuzzy adaptive control method with virtual negative inertia is designed to realize smooth switching and complementary advantages between control modes and accelerate frequency recovery.Moreover,the Logistic function is used to design an adaptive feedback control strategy considering the state of charge(SOC)of the energy storage,and the exit mechanism of energy storage is introduced to adjust and optimize the output of energy storage by feedback,so as to solve the problem that it is difficult to balance the frequency modulation effect and cycle life of energy storage.Finally,the effectiveness of the proposed strategy and the improvement of frequency are verified by simulation on Matlab/Simulink simulation platform.
battery energy storagefrequency modulationfuzzy controlparameter adaptive optimizationexit mechanism
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