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用于增强脉宽调制电压源逆变器性能的鲁棒最优控制设计

Robust Optimal Control Design for Performance Enhancement of PWM Voltage Source Inverter.

作者信息

Chang En-Chih, Cheng Hung-Liang, Chang Chien-Hsuan, Wu Rong-Ching, Cheng Chun-An, Xiao Zheng-Kai, Lu Wen-Jie, Wei Zhi-Yu

机构信息

Department of Electrical Engineering, I-Shou University, No.1, Sec. 1, Syuecheng Rd., Dashu District, Kaohsiung 84001, Taiwan.

出版信息

Micromachines (Basel). 2022 Mar 12;13(3):435. doi: 10.3390/mi13030435.

DOI:10.3390/mi13030435
PMID:35334727
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8955260/
Abstract

PWM (pulse-width modulation) voltage source inverters are used in a wide range of AC power systems where the output voltage must be controlled to follow a sinusoidal reference waveform. In order to achieve precision and fast-tracking control, restrictive sliding mode control (RSMC) provides a fast system state convergence time. However, the RSMC still suffers from the chattering problem, which leads to high harmonic distortion and slow response of the inverter output state. Furthermore, the load of the inverter may be severe load changing and the control parameters become difficult to adjust, worsening the adaptability to achieve the desired control of the inverter output. In this paper, a robust optimal control design comprised of an enhanced restrictive sliding mode control (ERSMC) and density particle swarm optimization (DPSO) algorithm is proposed, and then applied to PWM voltage source inverters. The ERSMC not only has finite time convergence but also provides chatter elimination. The DPSO is highly adaptable for acquiring the control parameters of the ERSMC and finding the best solution in the global domain. The proposed controller is realized for the actual PWM voltage source inverter controlled by a TI DSP-based development platform, so that the inverter output voltage has fast dynamic response and satisfactory steady-state behavior despite high load changing and non-linear disturbances.

摘要

脉宽调制（PWM）电压源逆变器广泛应用于各种交流电力系统中，在这些系统中，输出电压必须受到控制以跟踪正弦参考波形。为了实现精确和快速跟踪控制，约束滑模控制（RSMC）能提供快速的系统状态收敛时间。然而，RSMC仍然存在抖振问题，这会导致高谐波失真以及逆变器输出状态的缓慢响应。此外，逆变器的负载可能会剧烈变化，控制参数难以调整，从而降低了实现逆变器输出期望控制的适应性。本文提出了一种由增强约束滑模控制（ERSMC）和密度粒子群优化（DPSO）算法组成的鲁棒最优控制设计，并将其应用于PWM电压源逆变器。ERSMC不仅具有有限时间收敛性，还能消除抖振。DPSO高度适用于获取ERSMC的控制参数并在全局域中找到最优解。所提出的控制器通过基于TI DSP的开发平台实现了对实际PWM电压源逆变器的控制，使得逆变器输出电压在高负载变化和非线性干扰的情况下仍具有快速的动态响应和令人满意的稳态性能。

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