Composite differential evolution algorithm for SHM with low carrier ratio

• Published in: IET power electronics Vol. 11; no. 6; pp. 1101 - 1109
• Main Authors: Yu, Yanjun, Zhang, Pengfei, Song, Zaixin, Chai, Feng
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 29.05.2018
• Subjects: CoDE; composite differential evolution algorithm; control parameter settings; convergence rate; evolutionary computation; global searching ability; harmonics suppression; low‐carrier ratio; modulation degrees; multiple‐composite trial vectors; optimised PWM method; pulse width modulation; Research Article; selective harmonic elimination PWM; selective harmonic mitigation pulse width modulation; SHM; SHMPWM; switching angle numbers; switching angle solution; synchronous harmonic optimum PWM; low-carrier ratio; selective harmonic elimination PWM; control parameter settings; synchronous harmonic optimum PWM; composite differential evolution algorithm; switching angle numbers; CoDE; switching angle solution; evolutionary computation; pulse width modulation; SHMPWM; multiple-composite trial vectors; SHM; optimised PWM method; modulation degrees; global searching ability; convergence rate; selective harmonic mitigation pulse width modulation; harmonics suppression
• ISSN: 1755-4535; 1755-4543
• DOI: 10.1049/iet-pel.2017.0588

This study presents a new method of switching angle solution based on composite differential evolutions (CoDE) in selective harmonic mitigation pulse width modulation (SHMPWM). The method can effectively improve the global searching ability and convergence rate of the solution by the combination of multiple composite trial vectors and control parameter settings. Its great generality makes itself applicable to selective harmonic elimination PWM and synchronous harmonic optimum PWM as well. This study introduces the basic principles of SHMPWM and CoDE, constructs the constraint and objective functions by means of penalty, and gives detailed solution steps. After getting the switching angle solutions from comparative studies including different switching angle numbers, different modulation degrees, or different optimised PWM methods, the experimental platform finally has been designed and carried out to verify the accuracy and generality of the proposed method.