Efficient bidirectional mixed three-phase voltage rectifier control method

Abstract

The invention discloses an efficient bidirectional mixed three-phase voltage rectifier control method. The method comprises the steps that the current vector of the total input and the respective rectifier input, and the power grid voltage are measured; according to the voltage vector generated in a mixed three-phase voltage rectifier, the prediction value of future current is generated; the load active power is estimated through load reference current or detection load current; the prediction values are used to calculate future active power and reactive power; and comprehensive optimizing is carried out on the target parameters of the mixed three-phase voltage rectifier. Each parameter is evolved toward the direction of the target best coordination point, so that the mixed three-phase voltage rectifier acquires the best comprehensive performance index. According to the invention, an energy storage function is realized; energy waste is avoided; energy saving and environmental protection are realized; and the control and use safety performance of the entire product can be improved.

Description

Technical field [0001] The invention relates to the field of electric power technology, and in particular to a method for controlling a high-efficiency bidirectional hybrid three-phase voltage type rectifier. Background technique [0002] As power electronic devices such as converters are widely used in industrial production, transportation, aerospace, urban rail and other aspects, these power electronic devices basically all use uncontrolled rectifiers at the front end, which have relatively good power density and efficiency. Reliability is high, but there are shortcomings such as uncontrollable output intermediate DC voltage, input current distortion, high harmonic content, low power factor, and bidirectional energy flow. However, controllable rectifiers such as PWM rectifiers have low power density and are not suitable for applications with large-capacity loads. At the same time, the rating of power electronic devices is limited, that is, their withstand voltage and current a...

AI Technical Summary

Problems solved by technology

Only the parameters of a single rectifier are optimized, and the comprehensive control performance of these single rectifiers is improved from different angles, but the comprehensive performance index of the hybrid rectifier is still not comprehensively improved, and there is no research on the multi-objective parameter optimization of the hybrid rectifier.

Images