Passivity-based Hybrid Control Strategy with Variable Damping for Three Level UPQC

doi:10.11985/2021.04.016

Abstract

Abstract:

In order to improve the compensation performance of unified power quality conditioner (UPQC) for harmonic, based on the port-controlled Hamiltonian with dissipation (PCHD) mathematical model of UPQC, a passivity-based with variable damping controller is designed by using the model and the passivity of UPQC, the inner current loop adopts variable damping passivity-based control, and the outer voltage loop adopts variable integral coefficient nonlinear active disturbance rejection-proportional integral (ADR-PI) control. Compared with the traditional PI constant damping passivity-based control strategy, the total harmonic distortion rate of load voltage and grid current compensated by the variable damping passivity-based hybrid control strategy is lower. Finally, the simulation model of the T-type neutral point clamped UPQC passivity-based with variable damping hybrid control system is built on the Matlab/Simulink simulation platform, and the compensation performance of harmonic of UPQC is simulated. The simulation results show that the passivity-based with variable damping hybrid control strategy is feasible.

Key words: UPQC, PCHD model, variable damping, nonlinear ADR-PI control, passivity-based control

CLC Number:

TM464

XIA Liang, WANG Jiuhe, CHEN Meifeng, LIU Jinchang. Passivity-based Hybrid Control Strategy with Variable Damping for Three Level UPQC[J]. Journal of Electrical Engineering, 2021, 16(4): 127-134.

Figures/Tables 12

References 15

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参数		数值
串联侧	电容C₁/μF	6.8
	电感L₁/mH	0.5
	内阻R₁/Ω	0.01
	k_p1	0.5
	k_i1	0.5
并联侧	电感L₂/mH	1
	内阻R₂/Ω	0.2
	k_p2	1
	k_i2	0.1
负载侧	电阻R_L/Ω	10
负载侧	电感L_L/mH	5
ADR-PI	α	0.5
ADR-PI	δ	0.1
SOTD	β	100
	ε	0.001
	n₁	200
	n₂	100