chirp-z重组算法及其在电力设备绝缘监测中的应用

Chirp-Z Recombination Algorithm and Its Application in Power Equipment Insulation Monitoring

摘要:

在电力系统中,在线带电监测电力设备的绝缘性能,实现电网故障的预测和诊断是智能电网对电气设备绝缘性能自动化测量的重要要求;其中,通过谐波分析结算介质损耗,是测量绝缘性能的一种重要方法;为了提高谐波结算的实时性,文章采用了线性调频Z变换(Chirp-Z)及其双实序列在线重组算法,对介质损耗测量中电流电压的谐波计算进行了优化,很好地解决了测量中谐波和间谐波干扰难题,实现了高精度局部解谱,而耗时不到常规Chirp-Z算法的一半;该方法在涉及谐波计算的有限资源无线分布测量系统中获得了很好的应用。

Abstract:

In power system, the online monitoring of electric power equipment insulation, and the prediction and diagnosis of power grid fault are important requirement for the automatic measurement of the insulation performance of the smart grid. And, it is an important method for the measurement of insulation performance by the calculation of the dielectric loss through harmonic analysis. In this paper, we discussed chirp-z and its dual sequence reorganization algorithm. We used this algorithm to achieve fast and high precision local solution spectra in the medium loss on-line measurement by optimized the harmonic calculation of current and voltage, and solved the problem of harmonic and inter harmonic interference in the measurement, and improved the accuracy of measurement. This algorithm was widely applied in the wireless distributed measurement system with limited resources.