Research on Parameter Adaptive Control Strategy of Virtual Synchronous Generator

doi:10.11985/2021.03.003

Abstract

Abstract:

Virtual synchronous generator (VSG) simulates the mechanical and electrical characteristics of synchronous generator by introducing the moment of inertia (J) and damping coefficient (D_p), which effectively improves the stability of distributed power access to the grid. Since J and D_p in VSG can be dynamically adjusted, the influence of J and D_p on the system through small signal model analysis of VSG is analyzed. Then, according to the power angle characteristic curve, the setting principle of J and D_p in the oscillation period is analyzed, a parameter adaptive control strategy is proposed, and the adaptive control function of J and D_p is established, so that the VSG has better dynamic performance in power and frequency output. Finally, a simulation model is built by Matlab/Simulink to verify the feasibility of the adaptive control strategy.

Key words: Virtual synchronous generator, moment of inertia, damping coefficient, self-adaption

CLC Number:

TM464

GENG Haoxiang, WANG Weijun, TANG Shuai, ZHANG Guoping, MI Hongju. Research on Parameter Adaptive Control Strategy of Virtual Synchronous Generator[J]. Journal of Electrical Engineering, 2021, 16(3): 17-24.

Figures/Tables 18

References 20

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阶段	dω/dt	Δω	J	D_p
1	>0	>0	↑	↑
2	<0	>0	↓	↑
3	<0	<0	↑	↑
4	>0	<0	↓	↑

参数	数值		参数	数值
U_DC/V	800		U_g/V	220
L_f/mH	5		P_ref/kW	15
C/μF	30		P₀/kW	10
R_f/Ω	0.1		k_J	0.1
J₀/(kg·m²)	0.3		k_D	10
D₀		10	D_q	0.01
C_J		2