局部放电在线监测相位外同步新技术的研究

Research on the new technology of phase external synchronization for partial discharge on-line monitoring

为了克服传统相位同步技术在局部放电在线监测应用中的缺陷,研究了灯光相位同步和电源无线相位同步新技术。这两种相位外同步技术在硬件上综合采用光敏传感技术、电力电子技术、模拟信号调理技术和无线传输技术对电网相位信号进行采集、调理和实时传输,在软件上采用自适应数字消抖算法结合锁相环技术对相位波形进行分析。实际测试表明灯光相位同步技术在普通室内灯光强度下和电源无线相位同步技术在少遮挡环境下均能稳定的实现应用。相比传统同步技术,这两种相位外同步技术具有使用简单、安全、移动性好和相位实时同步的优点,在局部放电现场测量具有良好实用价值。

In order to overcome the defects of traditional synchronization technology in the application of partial discharge on-lines monitoring,the new technologies of light phase synchronization and power wireless phase synchronization in studied. These two kinds of phase external synchronization technologies use photosensitive sensing technology, power electronics technology, analog signal conditioning technology and wireless transmission technology to collect, adjust and real-time transmit phase signals of power grid. In software, adaptive digital dithering algorithm and phase-locked loop technology are used to analyze phase Wave. The actual test shows that the light phase synchronization technology can be applied stably in ordinary indoor lighting intensity and power wireless phase synchronization technology in less shielding environment. Compared with traditional synchronization technology, these two kinds of phase external synchronization technology have the advantages of simple use, safety, good mobility and real-time phase synchronization, and have good practical value in partial discharge field measurement.