Distributed-type flexible voltage regulation topological structure for power distribution network based on AC-DC converter

Abstract

Distributed flexible voltage regulation topology of distribution network based on AC-AC converter belongs to the technical field of power distribution and voltage regulation in distribution network operation, especially relates to a distributed flexible voltage regulation topology of distribution network based on AC-AC converter . The invention provides a distributed flexible voltage regulation topology structure of a distribution network based on an AC-AC converter, which can ensure the pass rate of the voltage at the user end and improve the quality of power supply. The invention includes a power frequency double-split transformer, a first double buck/boost AC-AC converter module, a second double buck/boost AC-AC converter module, an inductance L, a capacitor C and a bypass switch S, the main point of its structure is that the first secondary side of the power frequency double-split transformer is connected to the input end of the first double step-down/boost AC-AC converter module, and the second secondary side of the power frequency double-split transformer is connected to the second double step-down/step-up AC-AC converter module. The input terminals of the step-up AC-AC converter module are connected.

Description

technical field [0001] The invention belongs to the technical field of power distribution and voltage regulation in distribution network operation, and in particular relates to a distributed flexible voltage regulation topology structure of a distribution network based on an AC-AC converter. 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 ...

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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