The Study Of Marine Inverter And Parallel Control Base On Composite Control

In recent years, with the modernization of Chinese shipbuilding industry, marine electronic equipment has been developed at the direction of high-information technology. At the same time, the marine devices also make a higher demand to inverter than ever before.Therefore, it is an inevitable trend to marine power that the inverter which own high-performance become more and more popular.How to make the power supply a balanced, stable AC and how to realize paralleling control between the powers?These are hot topices of research recently.This article is in allusion to the defects of the traditional marine supply. Focusing on control method of three-phase marine inverter,this article improve the filtering algorithm of symmetrical components of feedback signal.Combining with repetitive control and fuzzy PI control, the performance of dealing with unbalanced or nonlinear loads would be advanced, as well as the capability of rapid response.In order to improve the capacity of the supply system,this paper studies the causes the control method of power paralleling.The main work of this paper are followed:(1) The topology of three-phase inverter and two kinds of pulse-width modulation technology are analysed in This article.Considering the characteristics of marine power, this reserch select the most suitable topology and modulation mathod of PWM.(2) This paper analyse the causes of three-phase output imbalance and the mathod to count positive and negative sequence component in the rotating coordinate system.The filtering algorithm for feedback signal is improved.On the basis,this paper design a composite controller constituted with the repetitive control and fuzzy PI control.(3).Analysising the circulation principle and the power characteristics of the parallel system, this paper designed a parallel controller in order to realize the equalization of power.It also propose the method of voltage phase synchronization based on CAN bus.(4).This paper show the design of the three-phase inverter’s hardware and software. It also show the experimental results of prototype.