面向微电网下双Buck变换器自抗扰重复控制方法

李季巍; 郭帅; 宋威; 宋玮琼; 崔健; 胡小晔

李季巍,郭帅,宋威,宋玮琼,崔健,胡小晔.面向微电网下双Buck变换器自抗扰重复控制方法[J].电测与仪表,2025,62(10):175-182.
LI Jiwei,GUO Shuai,SONG Wei,SONG Weiqiong,CUI JIAN,HU Xiaoye.Active disturbance rejection repetitive control method for dual Buck converter in microgrid[J].Electrical Measurement & Instrumentation,2025,62(10):175-182.

面向微电网下双Buck变换器自抗扰重复控制方法

Active disturbance rejection repetitive control method for dual Buck converter in microgrid

DOI：10.19753/j.issn1001-1390.2025.10.020

中文关键词: 微电网双Buck变换器重复控制自抗扰总扰动

英文关键词:microgrid, dual Buck converter, repetitive control, active disturbance rejection, total disturbance

基金项目:国家电网有限公司科技项目（5700-2021 18203A-0-0-00）

作者中文名	作者英文名	单位
李季巍	LI Jiwei	国网北京市电力公司客户服务中心
郭帅	GUO Shuai	国网北京市电力公司客户服务中心
宋威	SONG Wei	国网北京市电力公司客户服务中心
宋玮琼	SONG Weiqiong	国网北京市电力公司客户服务中心
崔健	CUI JIAN	青岛东软载波科技股份有限公司
胡小晔	HU Xiaoye	青岛东软载波科技股份有限公司

摘要点击次数: 23

中文摘要:

在微电网中，通常存在多种新能源作为电源，加之复杂运行工况的影响，使得其输出电能质量难以保证。通过分析微电网中功率变换器的各种扰动源，针对双Buck型变换器提出一种自抗扰重复控制方法，抑制系统的外部扰动和内部不确定，从而降低谐波含量，提高输出电能质量。所提方法利用重复控制环节抑制高频开关机构产生的谐波，提高对周期性扰动的抑制能力，克服双Buck变换器过零点畸变问题；建立双Buck变换器扩张状态方程，实时估计并补偿系统内部状态不确定性和外部非重复性扰动，从而克服重复控制环节周期延迟的固有弊端，有效提高系统的瞬态响应和抗干扰能力。通过MATLAB仿真，验证了所提方法的有效性。仿真结果表明，所提方法在交流电压精度、动态性能以及抗扰动方面均表现出满意的性能，特别是在面对负载突变、非线性负载等复杂应用场景时，控制器能够有效减小输出电压跳变、抑制波形畸变，确保变换器高质量输出。

英文摘要:

In microgrid, the presence of multiple renewable energy sources as power supplies, coupled with the influence of complex operating conditions, makes it challenging to ensure the output power quality. By analyzing various disturbance sources in power converters within the microgrid, active disturbance rejection repetitive control is proposed for a dual Buck converter. This method aims to suppress external disturbances and internal uncertainties in the system, thereby reducing harmonic content and improving the quality of the output power. A repetitive control component is utilized to suppress harmonics generated by high-frequency switches, improve the rejection ability of periodic disturbances, and overcome zero crossing distortion in the dual Buck converter; an extended state equation is established for dual Buck converters, which estimates and compensates for both internal state uncertainty and external non-repetitive disturbances in real-time. Then, the periodic delay which is the inherent drawbacks of the repetitive control is overcome, and the transient response and disturbance rejection capability of the system are improved effectively. The effectiveness of the proposed method is verified by MATLAB platform. The experiment results show that the proposed scheme obtains satisfied performance in alternating current (AC) voltage accuracy, dynamic performance, and disturbance resistance, especially in complex application scenarios such as load transients and nonlinear loads, the controller can reduce the output voltage fluctuations effectively, suppress waveform distortion, and ensure high-quality output voltage of the converter.

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