Coordinate control of grid-connected converter based on QPSO under unbalanced grid voltage

被引：0
|
作者：
Liu J. [1 ]
Zhao C.-C. [1 ]
Xie Z.-H. [2 ]
Zhou F.-H. [1 ]
机构：
[1] College of Automation, Xi'an University of Technology, Xi'an
[2] Xi'an Thermal Power Research Institute Co. Ltd, Xi'an
来源：
Kongzhi yu Juece/Control and Decision | 2021年 / 36卷 / 04期
关键词：
(QPSO); Coordinate control; Current harmonic distortion rate; Grid-connected converter; Power fluctuation; Quantum particle swarm optimization; Unbalance grid voltage;
D O I：
10.13195/j.kzyjc.2019.0885
中图分类号：
学科分类号：
摘要：
Under unbalanced grid voltage, the ride-through operation of wind power systems will lead to fluctuations on output power and obvious harmonic distortion in grid-connected current. For the problem of that the constant output power and good current quality can not be achieved simultaneously, a power/current coordinate control scheme based on the quantum particle swarm optimization (QPSO) algorithm is proposed. The regulation coefficients α and β are introduced into the calculation of reference current, and the relationships between the amplitude of power fluctuations, the harmonic distortion rate of current and the regulation coefficients are deduced. In order to take the power and current into account, the optimization model of the regulation coefficients is established with the minimum fluctuations on output power as the control objective and the current harmonic distortion limit as the constraint condition. Under the condition of different types of voltage unbalance faults, the coordinate control of power and current is realized using Matlab, which verifies the feasibility and effectiveness of the proposed control scheme. Copyright ©2021 Control and Decision.
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页码：901 / 908
页数：7
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