非对称负载下矩阵变换器改进型 PI 重复控制

针对非对称负载下矩阵变换器（ MC）重复控制与PI控制的不足，提出改进的复合控制策略，有效改善输出电压质量。通过建立d-q坐标系下的MC数学模型，分析系统稳定性条件与扰动抑制特性，设计控制器；因重复控制器的内模包含一个延迟环节，信号调节显著滞后。在分析Park变换前后谐波分布特点基础上，采用双序Park变换，将相坐标系下的谐波变换为d-q坐标系下的3倍次谐波，进而改进内模，减少控制系统调节时间，同时可保证谐波抑制性能。仿真结果表明，所提控制方案具有良好的扰动抑制特性和快速的调节能力，可有效解决三相输出电压不平衡问题。...

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Bibliographic Details
Published in电测与仪表 Vol. 52; no. 4; pp. 54 - 59
Main Author 陈林 杨俊华 陈思哲 吴捷
Format Journal Article
LanguageChinese
Published 广东工业大学自动化学院,广州,510006%华南理工大学电力学院,广州,510641 2015
Subjects
Park变换
PI
矩阵变换器
重复控制
非对称负载
unsymmetrical load
repetitive control
非对称负载
PI
matrix converter
矩阵变换器
重复控制
Park变换
park transformation
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ISSN1001-1390

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Summary:针对非对称负载下矩阵变换器（ MC）重复控制与PI控制的不足，提出改进的复合控制策略，有效改善输出电压质量。通过建立d-q坐标系下的MC数学模型，分析系统稳定性条件与扰动抑制特性，设计控制器；因重复控制器的内模包含一个延迟环节，信号调节显著滞后。在分析Park变换前后谐波分布特点基础上，采用双序Park变换，将相坐标系下的谐波变换为d-q坐标系下的3倍次谐波，进而改进内模，减少控制系统调节时间，同时可保证谐波抑制性能。仿真结果表明，所提控制方案具有良好的扰动抑制特性和快速的调节能力，可有效解决三相输出电压不平衡问题。
Bibliography:matrix converter, PI, repetitive control, unsymmetrical load, park transformation
23-1202/TH
In order to solve the control problems of matrix converter（MC） in unsymmetrical load with PI control or re-petitive control （ RC） strategy, a combined scheme of PI and RC method was proposed, with which the quality of out-put voltage could be effectively promoted.The compound controller was designed by establishing the mathematical model of MC in d-q coordinates, and analyzing the stability conditions as well as the characteristics of disturbance at-tenuation of MC system.As a delay link was included in the internal model of the repetitive controller, an obvious lag existed in signal regulation process.Based on analyzing the harmonic distribution features around park transformation, the harmonics in phase coordinate system was converted to 3 times harmonics in d-q coordinates by park transformation in double sequences.The internal model was improved, and the settling time of the compound controller could be re-duced wit
ISSN:1001-1390