Distributed flexible voltage-regulation control system for power distribution network

Abstract

The invention belongs to the technical field of operation power distribution and voltage regulation of a power distribution network, and especially relates to a distributed flexible voltage-regulationcontrol system for a power distribution network. The system provided by the invention can guarantee the qualified rate of the voltage of a user terminal, and improves the power supply quality. The system comprises a power frequency double-splitting transformer, a first double buck / boost AC-AC converter module, a second double buck / boost AC-AC converter module, an inductor L, a capacitor C, a DSP,and a bypass switch S. The structural main points of the system are that a first secondary side of the power frequency double-splitting transformer is connected with the input end of the first doublebuck / boost AC-AC converter module, and a second secondary side of the power frequency double-splitting transformer is connected with the input end of the second double buck / boost AC-AC converter module; one output end of the first double buck / boost AC-AC converter module is connected with one end of the capacitor C and one end of the bypass switch S through the inductor L.

Description

technical field [0001] The invention belongs to the technical field of power distribution and voltage regulation for distribution network operation, and in particular relates to a distributed flexible voltage regulation control system for a distribution network. Background technique [0002] With the rapid development of the national economy and the rapid growth of load, the problem of poor power quality of distribution network caused by voltage drop and sudden rise of distribution network has become increasingly prominent. Voltage drops and sudden rises will affect the normal operation of user electrical equipment, especially the safe and stable operation of sensitive loads such as industrial process control, precision instruments, and computer systems. Although the voltage quality of the distribution network has received great attention, in the current practical application of voltage regulation in the distribution network, voltage regulation through reactive power compens...

AI Technical Summary

Problems solved by technology

Although the voltage quality of the distribution network has received great attention, in the current practical application of voltage regulation in the distribution network, voltage regulation through reactive power compensation devices and transformer taps has limited voltage regulation range, poor adaptability, and low sensitivity. The problem is that it cannot meet the requirements of real-time voltage tracking and compensation, and is not suitable for some precision instruments and sensitive equipment; although the dynamic voltage regulator can realize the function of real-time regulation of the voltage of electrical equipment, the voltage regulation range is limited, and it cannot be deep. , long-term voltage regulation, and the existence of DC energy storage units increases the size and cost of equipment

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