基于LabView的光纤电流互感器一体化测试系统设计

Design of Integrated Testing System for Optical Fiber Current Transformer Based on LabView

光纤电流互感器日益成为电力系统中最重要的设备,在实用化研究中,光纤电流互感器的检测精度是重要的指标之一,而被测电流的谐波和光纤电流互感器内部的噪声往往影响其测量的准确性;因此对光纤电流互感器谐波的检测以及对其解调算法实用性的验证非常重要;为进一步的谐波治理提供依据及验证解调算法能否有效运用问题,在详细分析现有的谐波检测理论和两种解调算法原理的基础上,设计了一种基于虚拟仪器LabView的光纤电流互感器谐波检测及解调算法测试一体化系统,在快速检测电流各次谐波电平的同时解调出被测电流的信息并对比验证两种解调算法的可行性与优越性,验证结果表明第二种解调算法的精度明显优越于第一种解调算法,更能适用于光纤电流互感器的信号解调。

Optical fiber current transformer has become one of the most important equipment in power system, in the practical research, the detection accuracy of optical fiber current transformer is one of the important indexes, and the accuracy of the measured noise and internal harmonic optical fiber current transformer current often affecting the measurement. So it is very important to detect the harmonic of the optical fiber current transformer and to verify the practicability of the demodulation algorithm. Based on the detailed analysis of the existing harmonic detection theory and two kinds of demodulation algorithm, we design a detection and demodulation algorithm of optical fiber current transformer harmonic test system based on LabView integration, in the rapid detection of harmonic current and harmonic distortion level at the same time the demodulated information and comparing the measured current to verify the feasibility and superiority of two demodulation algorithm, the verification results show that the second kinds of demodulation algorithm accuracy is superior to the first demodulation algo rithm, more suitable for signal demodulation of fiber optic current transformer.