光伏逆变器直流电压传感器故障诊断与容错控制

Proceedings of The 7th International Power Electronics and Motion Control Conference Pub Date : 2012-06-02 DOI:10.1109/IPEMC.2012.6259020

Gwang-Seob Kim, Kyo-Beum Lee

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引用次数: 4

摘要

提出了一种两级三相并网光伏逆变器直流电压传感器的故障诊断与容错控制方法。在这个系统中，一个传感器是必不可少的功率转换。当被测值与估计值之间存在误差时，检测到传感器故障，该估计值由直流链路电压无传感器算法获得。利用估计值实现容错控制。为了满足算法的动态特性，采用了无差拍电流控制器。仿真和实验结果验证了该算法的有效性。

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Fault diagnosis and fault-tolerant control of a dc-link voltage sensor for PV inverters

This paper proposes a method for fault diagnosis and fault-tolerant control of a dc-link voltage sensor for two-stage three-phase grid-connected PV inverters. In this system, a sensor is essential for power conversion. A sensor fault is detected when there is an error between the sensed and estimated values, which are obtained from a dc-link voltage sensorless algorithm. Fault-tolerant control is achieved by using the estimated values. A deadbeat current controller is used to meet the dynamic characteristic of the proposed algorithm. The proposed algorithm is validated by simulation and experimental results.

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Proceedings of The 7th International Power Electronics and Motion Control Conference

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