Optimization of SHMPWM emission strategy for fine electromagnetic detection in the frequency domain
Year: 2025
Type: conference-paper
Abstract: In frequency-domain electromagnetic detection, the resistive-inductive characteristics of the ground and cables, along with dead-time effects, distort the rectangular emission current waveform. This distortion gives rise to sideband interference and results in the loss of main spectral energy, ultimately compromising detection effectiveness. To achieve energy focusing and precise allocation, a bipolar-optimized selective harmonic mitigation pulse width modulation (SHMPWM) strategy considering inductive loads is proposed. This strategy analyzes the impact of inductive load effects on the waveform and extends the waveform based on the equal-area principle, culminating in a compensation method to ensure that the optimized emission energy aligns with the ideal value. To enable customized spectrum and precise compensation, a particle swarm optimization (PSO) algorithm based on an adaptive velocity formula is designed to solve the nonlinear equations of SHMPWM, accurately yielding switching angles and thereby enhancing harmonic control. Experimental results validate the effectiveness and superiority of this strategy.
Authors: Yingjie Wang, Chenguang Wang, Chunxiang Bao, Pengfei Lu
Institutions: China University of Mining and Technology, CHN Energy (China)
Language: English
Topic: Power Quality and Harmonics
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4409547789