Power supply circuit adjusting method and device and power supply system

Abstract

The invention provides a power supply circuit adjusting method and device and a power supply system. The method is used for adjusting output of a target power supply circuit by adjusting an amplitude limiting value in a target control loop. The target control loop is a control loop corresponding to the target power supply circuit. The method comprises the following steps: acquiring a sampling current value and a given current value of a target control loop in real time, wherein the sampling current value of the target control loop is acquired from a target power supply circuit by a current transformer; judging whether the current transformer is saturated or not based on the sampling current value and the given current value; if the judgment result shows that the current transformer is saturated, reducing an amplitude limiting value corresponding to a target controller / arithmetic unit in the target control loop according to a first preset step length; and enabling the amplitude limiting value corresponding to the target controller / arithmetic unit to be used for carrying out amplitude limiting on the output quantity of the target controller / arithmetic unit, and enabling the output quantity of the target controller / arithmetic unit to be in positive correlation with the output quantity of the target control loop. The stable operation of the target power supply circuit can be ensured.

Description

technical field [0001] The invention belongs to the technical field of circuits, and more specifically relates to a method and device for adjusting a power supply circuit, and a power supply system. Background technique [0002] When performing feedback control on a power supply circuit, it is usually necessary to collect current in the power supply circuit through a current transformer. When the current transformer is working, if the unbalanced heavy load and the high voltage on the grid side exist at the same time, the voltage drop on both sides of the inductance in the power supply circuit will decrease, and the rate of change of the inductance current will decrease, resulting in current mutual inductance The sampling of the device is saturated, which in turn makes the hardware current limiting circuit invalid, affects the accuracy of the subsequent control link, and affects the stable operation of the power supply circuit. At this time, it is necessary to reduce the ope...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a power supply circuit adjustment method and device, and a power supply system to solve the technical problem in the prior art that the current transformer is saturated and thus affects the stability of the power supply circuit

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