Switch rectifier multi-objective optimization design method based on NSGA-II algorithm

Abstract

The invention provides a Switch rectifier multi-objective optimization design method based on an NSGA-II algorithm, and belongs to the technical field of rectifier parameter optimization design. The method comprises the following steps: 1, determining an optimized component and carrying out power and volume modeling; 2, defining a target function; 3, initializing a population; 4, selecting; 5, selecting binary match; 6, crossing; 7, realizing variation; 8, combining the parent population and the offspring population to obtain a first generation population; 9, forming populations by utilizingthe parent population and the offspring population; 10, reaching the maximum evolution algebra gen; and 11, outputting a Pareto optimal solution leading edge and a parameter matrix, according to the selected target performance indexes, obtaining corresponding decision variable values, namely solutions of the optimization problem, and selecting and designing components according to the parameters.

Description

technical field [0001] The invention relates to a multi-objective optimization design method for a Swiss rectifier based on NSGA-II algorithm, and belongs to the technical field of rectifier parameter optimization design. Background technique [0002] In recent years, with the wide application of power electronic devices, more and more research and optimization technologies on converters have been paid great attention by researchers at home and abroad, and various high-efficiency and novel rectifier topologies and digital controls have emerged as the times require. , leading to the rapid development of electric vehicles and new energy technologies; the remarkable performance characteristics of the rectifier system are high frequency, high efficiency, high power density, high power factor, high reliability, etc., accompanied by various new electromagnetic materials, electronic components The advent and application of devices and conversion technologies have led to the develop...

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Problems solved by technology

[0003] However, since the Swiss rectifier has nonlinear components such as inductors, the rectifier system is a strongly nonlinear system, and there are many parameters and performances of components that need to be optimized. Another performance reduction is the price; this makes the Swiss rectifier, a complex optimization problem with multi-objective, uncertain, nonlinear and multi-parameter, difficult to achieve in traditional optimization methods, judging each parameter empirically cannot guarantee its Accuracy; how to use rigorous mathematical methods to select appropriate devices and deal with multi-objective optimization problems with discrete variables such as rectifiers, so as to optimize the overall performance of the system, is of great significance to the reliable operation of the system and the sustainable development of energy ; Therefore, a multi-objective optimization method for Swiss rectifiers is imperative

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