基于新型双环控制的LC型逆变器研究

doi:10.16183/j.cnki.jsjtu.2021.275

摘要/Abstract

摘要：

为提高LC型逆变器的电压跟踪和抗扰性能,提出了一种新型电压电流双环控制策略.首先,引入虚拟电阻后对消零极点,将电压环整定为一阶惯性环节,从而减小电压跟踪时的超调;其次,采用次速电流环控制方法提高电流环的响应速度,进而抑制暂态时的电压突变;最后,分析电压恢复期产生超调的原因并通过自适应积分器初值消除超调,改善了扰动时的电压波形畸变.所提新型控制策略在传统双环控制的基础上,分别对电压环和电流环算法进行改进,针对性地解决了后者阶跃响应和抗负载扰动性能不足的缺点,MATLAB/Simulink模型的仿真结果验证了该方法的可行性和有效性.

关键词: 逆变器, 双环控制, 虚拟电阻, 次速电流环, 自适应积分器初值

Abstract:

To improve the voltage tracking and anti-disturbance performance of the LC inverter, a novel voltage-current dual-loop control strategy is proposed. First, the voltage loop is tuned to first-order inertia link by zero-pole cancellation based on virtual resistance, which restrains the overshoot during voltage tracking. Next, the hypo-time-optimal current-loop is adopted to enhance the response speed of the current loop, which suppresses the sudden change of transient voltage. Finally, the cause of overshoot during the voltage recovery period is analyzed and the overshoot is eliminated by the adaptive integrator initial value, which modifies the voltage waveform distortion under loading disturbance. Based on the traditional double-loop control, the voltage loop and the current loop are improved respectively by the proposed novel control strategy, which overcomes the shortcomings of step response and anti-load disturbance performance. The feasibility and effectiveness of this method are validated through simulations on MATLAB/Simulink.

Key words: inverter, dual-loop control, virtual resistance, hypo-time-optimal current-loop, adaptive integrator initial value

中图分类号:

TM464

李双, 施建强. 基于新型双环控制的LC型逆变器研究[J]. 上海交通大学学报, 2022, 56(9): 1139-1147.

LI Shuang, SHI Jianqiang. An LC Inverter Based on Novel Dual-Loop Control[J]. Journal of Shanghai Jiao Tong University, 2022, 56(9): 1139-1147.

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参数	数值	参数	数值
u_dc/V	800	ζ	0.419
f_s/kHz	10	ω_n/(rad·s^-1)	722
L/mH	2.6	k_up	0.012
R/Ω	0.1	k_ui	9.911
C/μF	19	k_ip	16.336
V_n/V	311	k_ii	628.319
f_n/Hz	50	R_v	61.216
P_n/kW	10	i_c/A	2
ω_bi/(rad·s^-1)	6283	—	—