Parallel control method and system for multiple parallel-connected power quality control devices

A power quality, paralleling technology, applied in circuit devices, harmonic reduction devices, electrical components, etc., can solve the problems of inability to guarantee compensation performance and reliability, and achieve the effect of ensuring compensation performance and reliability and improving equipment compensation capacity.

Active Publication Date: 2020-12-11
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the compensation performance and reliability of the parallel control of multiple PAPQCs in the prior art cannot be guaranteed

Method used

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  • Parallel control method and system for multiple parallel-connected power quality control devices
  • Parallel control method and system for multiple parallel-connected power quality control devices
  • Parallel control method and system for multiple parallel-connected power quality control devices

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Embodiment Construction

[0048] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus their repeated descriptions will be omitted.

[0049] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or mo...

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Abstract

The present disclosure relates to a parallel control method and system of a parallel power quality control device, wherein the method includes: determining the current information of the load current; and calculating the reactive power of each PAPQC in the parallel system according to the output current of the preset overall compensation according to the current information Current, unbalanced current, and frequency-division harmonic current compensation commands, and distribute the current compensation commands to the corresponding PAPQCs, so that each PAPQC generates compensated output currents according to the received current compensation commands, and performs compensation according to the compensation control strategy Parallel control. The invention can effectively utilize the compensation capacity of the equipment, broaden the compensation frequency band of the system, and at the same time ensure the compensation performance and reliability of the parallel connection of the equipment.

Description

technical field [0001] The present disclosure relates to the technical field of power electronics, and in particular, to a parallel control method and system for multiple parallel-connected power quality control devices. Background technique [0002] In recent years, society's demand for electricity has been increasing day by day, and a large number of loads that have an impact on the power quality of the grid have been applied on a large scale, which has caused power quality problems. Parallel Active Power Quality Compensation (PAPQC) is one of the effective devices for controlling reactive current, unbalanced current and harmonic current caused by unbalanced load and nonlinear load. Due to the limited compensation capacity of a single PAPQC, multiple PAPQCs can be connected in parallel to adapt to industrial sites and increase the compensation capacity. However, the compensation performance and reliability of the parallel control of multiple PAPQCs in the prior art cannot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24H02J3/01H02J3/18H02J3/26
CPCH02J3/24H02J3/01H02J3/18H02J3/26H02J2203/20Y02E40/30Y02E40/40Y02E40/50
Inventor 周京华章小卫陈亚爱张贵辰张荣朴政国
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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