A buck-boost matrix converter parameter optimization method and device

Abstract

The invention provides a method and a device for optimizing parameters of a Buck-Boost matrix converter (BBMC). The method comprises the steps of: establishing a multi-target optimization satisfaction function according to an optimization object and an optimization target; further constructing a fitness function of a fruit fly optimization algorithm according to the multi-target optimization satisfaction function; then carrying out iterative optimization on each parameter of the BBMC according to the fitness function through adopting an adaptive fruit fly optimization algorithm to obtain a group of optimal parameters, in order to enable the THD, deltauC and deltaiL to realize collaborative optimum, thus enabling the BBMC to have a better operation effect. According to the method and the device for optimizing the parameters of the Buck-Boost matrix converter, the influences of a main circuit parameter and a control parameter of the BBMC to the THD, the deltauC and the deltaiL are comprehensively taken into consideration, and the adaptive fruit fly optimization algorithm is adopted to realize the optimization of each parameter of the BBMC. The invention has the characteristics of simple optimization algorithm and good optimization effect.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a Buck-Boost matrix converter parameter optimization method and device. Background technique [0002] Buck-Boost Matrix Converter (BBMC for short) is a new type of power converter that has a high voltage transmission ratio and can directly output high-quality sine waves. However, since the harmonic distortion of the BBMC output voltage waveform is not only related to its main circuit parameters, but also related to the control parameters of the corresponding control strategy, if the above main circuit parameters or control parameters are not selected properly, it will cause BBMC output voltage waveform distortion. Harmonic distortion is too large, which will lead to problems such as reduced load operating performance and increased loss. In addition, the deviation between the two state variables in BBMC, namely the capacitor voltage and inductor current, and their refer...

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Problems solved by technology

Due to the deviation between these two state variables and their reference values, there is a deviation between the actual output voltage of the BBMC and its reference output voltage, which in turn affects aspects such as the speed control accuracy of the asynchronous motor speed control system with the BBMC as the frequency converter. application

In the past, when selecting BBMC main circuit parameters and related control parameters, it was mainly obtained by trial and error, so it was difficult to obtain the best operating effect

[0003] In recent years, some researchers have proposed to use Particle Swarm Optimization (PSO) to optimize the main circuit parameters and control parameters of BBMC. Although some results have been achieved, it does not take into account the relationship between the main circuit parameters and control parameters. Influence each other, and there are many parameters that need to be adjusted in PSO, and it is easy to fall into the local optimal solution.

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