Frequency Modulation Characteristics Analysis of Wind Power Virtual Synchronous Machine Based on Energy Storage

doi:10.16628/j.cnki.2095-8188.2020.08.004

Abstract

Abstract:

The new energy plant based on virtual synchronizer generator(VSG) is an effective way to solve the problem of insufficient moment of inertia.The traditional VSG based wind farm can suppress the fluctuation when the power suddenly increases/decreases,and make the output power more smooth,but it lacks the VSG control matched with wind power and energy storage.Therefore,the control principle and mathematical model of wind power and energy storage are deduced,and the control model with VSG is built.Finally,based on the MATLAB/Simulink simulation system,the frequency modulation characteristics of wind turbine and energy storage in response to sudden increase/decrease of power are analyzed.The results show that the proposed control method for VSG control of wind power and energy storage can effectively suppress power fluctuation and has good frequency modulation characteristics.

Key words: wind plant, energy storage, virtual synchronizer generator, frequency modulation characteristics

CLC Number:

TM615

YAN Quanchun, GU Wen, LI Chenglong, LIU Yanan, MEI Rui. Frequency Modulation Characteristics Analysis of Wind Power Virtual Synchronous Machine Based on Energy Storage[J]. LOW VOLTAGE APPARATUS, 2020, 593(8): 18-22.

Figures/Tables 8

References 17

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参数	数值	参数	数值
额定电压/V	690	额定风速/(m·s^-1)	8
切入风速/(m·s^-1)	0.5	暂态电抗/p.u.	0.349 6
切出风速/(m·s^-1)	12	功率因数	-0.95~0.95
额定频率/Hz	50

工况	调频特性/Hz			提升效果/%
工况	无VSG	含VSG		提升效果/%
工况1	+0.20		+0.12	40.0
工况2	-0.27		-0.15	44.4