Complex control method of series inverter, storage medium and equipment

Abstract

The invention discloses a complex control method of a series inverter, a storage medium and equipment. The method comprises the steps that a load voltage, a filtering capacitor voltage and an inductorcurrent are acquired; coordinate system transformation is performed on the load voltage, the filtering capacitor voltage and the inductor current, and a feedback value of the load voltage, a feedbackvalue of the filtering capacitor voltage and a feedback value of the inductor current are obtained; load voltage outer loop control calculation is performed according to a difference value between arated load voltage and the feedback value of the load voltage, and a given value of inductor current inner loop control is obtained; inductor current inner loop control calculation is performed according to a difference value between the given value of the inductor current inner loop control and the feedback value of the inductor current, and a given value of filtering capacitor voltage inner loopcontrol is obtained; voltage inner loop control calculation is performed according to a difference value between the given value of the filtering capacitor voltage inner loop control and the feedbackvalue of the filtering capacitor voltage, and a compensation voltage is obtained; and the compensation voltage is used as a control signal to be output. Through the implementation of the method, compensation on balanced and unbalanced drop of a network voltage is realized.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a composite control method, storage medium and equipment for a series inverter. Background technique [0002] With the rapid development of science and technology, sensitive loads such as high-precision machining and data centers have put forward higher requirements on the power quality of the power grid. At the same time, the capacity of a large number of impact and non-linear power loads has increased, making the power quality problems of modern power grids increasingly prominent. . [0003] The current power quality system uses series voltage compensation to improve voltage fluctuations such as power grid voltage surges, dips, flicker, and harmonics. In the power quality system, the series inverter is usually used as the grid voltage compensation device. Generally, the series inverter is connected in series between the grid and the power load, and its output voltage...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the embodiment of the present invention provides a compound control method, storage medium and equipment for series inverters to solve the technical problems of slow dynamic response and poor compensation performance in the prior art using the load voltage loop control method

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