Real time symmetrical coordinate transformation applied for detection of imbalanced fault in utility power system

2014 16th International Power Electronics and Motion Control Conference and Exposition Pub Date : 2014-12-11 DOI:10.1109/EPEPEMC.2014.6980532

N. Kimura, Koji Niijima, T. Morizane, H. Omori

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引用次数: 7

Abstract

This paper has investigated the possibility of a real time symmetrical coordinate transformation. Simulation is performed when it is applied for detection of imbalanced fault in utility power system. The power conditioner is required to remain connected when the fault occurs in the utility power system under certain condition. This is called as the fault ride through (FRT) ability. The most popular fault is 1 line-to-ground fault. This fault causes the imbalance voltages and currents in 3-phase power system. To optimize the output from the power conditioner of the photovoltaic system, the detection of the imbalanced condition is important factor. In this paper, the signal processing method by using the complex number algebra in real time system is shown at first. The fast detection of the imbalanced condition is verified by the computer simulations. Then the effects of the harmonic components existing in the system voltage have been investigated. The generation of the offset output and the oscillating waveforms are indicated.

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实时对称坐标变换在电力不平衡故障检测中的应用

本文研究了实时对称坐标变换的可能性。将该方法应用于电力系统不平衡故障的检测，并进行了仿真。在一定条件下，当公用电力系统发生故障时，要求电源调节器保持连接。这被称为断层穿越(FRT)能力。最常见的故障是1线对地故障。该故障导致三相电力系统电压和电流不平衡。为了优化光伏系统功率调节器的输出，不平衡状态的检测是一个重要的因素。本文首先介绍了在实时系统中利用复数代数对信号进行处理的方法。计算机仿真验证了该方法对不平衡状态的快速检测。然后研究了系统电压中谐波分量的影响。说明了偏置输出和振荡波形的产生。

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2014 16th International Power Electronics and Motion Control Conference and Exposition

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