A signal processing method, circuit and system for parallel multi-power modules

Abstract

The invention discloses a signal processing method, circuit and system of parallel multi-power modules. The signal processing system includes a signal processing circuit, and the signal processing circuit includes a state signal switching circuit and a driving signal switching circuit. The method includes: S1. Acquiring status signals of each power module, and generating an overall status signal of the parallel multi-power module based on the acquired status signals; S2. Driving multiple power modules to work based on the overall status signal of the parallel multi-power module or stop. In the case of multiple power modules connected in parallel, the drive signals and status signals of multiple power modules are effectively switched and processed, system resources are saved, and the system is easy to implement, low in cost, and high in reliability.

Description

technical field [0001] The invention relates to frequency converters, and more specifically, to a signal processing method, circuit and system for parallel multi-power modules. Background technique [0002] With the continuous increase of wind power unit capacity, the power level of wind power inverters is also gradually increasing, and to achieve higher power inverters, it has become an application trend to use multiple power modules in parallel. The parallel connection technology of multiple power modules in the inverter has the advantages of effectively improving the power level, increasing system reliability and efficiency, reducing costs, and strong flexibility. However, with the increase in the number of parallel power modules, the control and The number of protection signals also increases accordingly. [0003] At present, the fiber optic solution is mainly used to process the signals of multiple power modules. In the fiber optic solution, the control and protection ...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the defect that the signal of the parallel multi-power module of the inverter is separately processed, the development cycle is long and the cost is high in the prior art, and a signal processing method, circuit and system of the parallel multi-power module are provided. The signal conversion process when two power modules are connected in parallel can effectively solve the problems of insufficient control ports and limited software resources, and the design scheme is simple, easy to implement, low cost, and high reliability.

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