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

En-Chih Chang1, Hung-Liang Cheng1, Chien-Hsuan Chang1

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

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Summary
This summary is machine-generated.

This study introduces an enhanced restrictive sliding mode control (ERSMC) with density particle swarm optimization (DPSO) to improve pulse-width modulation (PWM) voltage source inverters. The new method eliminates chattering and enhances adaptability for stable AC power output.

Keywords:
PWM voltage source inverterdensity particle swarm optimizationenhanced restrictive sliding mode control

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Area of Science:

  • Electrical Engineering
  • Control Systems
  • Power Electronics

Background:

  • Pulse-width modulation (PWM) voltage source inverters are crucial for AC power systems, requiring precise output voltage control.
  • Restrictive sliding mode control (RSMC) offers fast convergence but suffers from chattering, leading to harmonic distortion and slow response.
  • Inverter load variations and parameter adjustment difficulties hinder adaptability and desired control performance.

Purpose of the Study:

  • To propose a robust optimal control design for PWM voltage source inverters.
  • To address the chattering problem and improve adaptability in RSMC.
  • To enhance the dynamic response and steady-state behavior of inverter output voltage.

Main Methods:

  • Developed an enhanced restrictive sliding mode control (ERSMC) for finite-time convergence and chatter elimination.
  • Utilized density particle swarm optimization (DPSO) for adaptable acquisition of ERSMC control parameters and global optimization.
  • Implemented the proposed controller on a TI DSP-based development platform for a PWM voltage source inverter.

Main Results:

  • The ERSMC effectively eliminates chattering, improving harmonic distortion and response speed.
  • DPSO successfully optimized ERSMC parameters, enhancing adaptability to severe load changes.
  • The implemented controller demonstrated fast dynamic response and satisfactory steady-state behavior under disturbances.

Conclusions:

  • The proposed ERSMC combined with DPSO offers a robust and adaptable solution for PWM voltage source inverters.
  • This approach significantly improves inverter performance, overcoming limitations of traditional RSMC.
  • The controller ensures reliable AC power output with fast response and stability, even under challenging conditions.