Wide-Frequency Resonance Damping Enhancement Strategy for Energy Storage Converters

doi:10.16628/j.cnki.2095-8188.2026.01.007

Abstract

Abstract:

In response to the increasingly prominent issue of wide-frequency resonance in power grids with high penetration of renewable energy integration,a wide-frequency resonance damping enhancement strategy based on energy storage converters is proposed.An adaptively adjusted virtual impedance is introduced into the control loop in this strategy,which enables the energy storage converter to effectively absorb the resonance energy induced by other converters at the point of common coupling (PCC) while completing the predetermined power dispatch task,thus achieving the effect of wide-frequency resonance damping.Firstly,a control strategy for the energy storage converter is constructed,and an impedance model is established based on virtual synchronous machines.Secondly,a resonance damping control method based on the active damping principle is proposed.Finally,a design method for adaptive adjustment of virtual impedance is proposed,and its impact on the stability of other converters at the PCC is analyzed.Experimental results show that the method proposed has good suppression capability for wide-frequency resonance issues.

Key words: active damper, power conversion system, broadband resonance, weak grid, virtual impedance

CLC Number:

TM464

MEI Haihua, CHEN Nan, YANG Lukai, LI Hongde, ZHU Mingzhe. Wide-Frequency Resonance Damping Enhancement Strategy for Energy Storage Converters[J]. LOW VOLTAGE APPARATUS, 2026, 0(1): 49-57.

Figures/Tables 22

参数	数值	参数	数值
U_g/V	220	L₁/mH	4
ω₀/(rad·s^-1)	100π	C/μF	11
K_p	10	L₂/mH	1
K_r	4 100	k_ppll	0.5
K_c	2.2	k_ipll	31.5
$i A *$ /A	10.7	f_sA/kHz	10

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参数	数值	参数	数值
U_dc/V	600	L₁/mH	4
U_g/V	220	C/μF	11
K_PWM	1	J	3
D	82	k_ip	10
K	2	K_ui	400
K_up	3	K_pR	0.1
K_iR	5.5	ω_ref/(rad·s^-1)	100π
P_ref	15 000	Q_ref	0
U_n	380	f_sB/kHz	20
S_B/kW	15

电网阻抗	目标变流器THD/%	目标变流器THD/% (集成有源阻尼功能)
SCR=11.6	11.87	2.47
SCR=7.6	12.13	2.75
SCR= 1.9	13.34	3.31