Research On On - Line Insulation Monitoring System For High Voltage Electrical Equipment In Substation

With the needs of the development of modern high-tech society, our country’s voltage level and the capacity of the power grid and the corresponding improving, and the demand for power supply, will pay more attention to its reliable degree, the current maintenance system mainly based on the last turn of preventive maintenance for the state overhaul method of maintenance system, But now the condition is the premise of the high voltage equipment maintenance system to realize on-line monitoring. Due to the high pressure in the high-pressure equipment took the largest part of the capacitive equipment, so the state of the insulation for on-line monitoring of great significance. Due to the capacitive equipment insulation state is an insulator dielectric loss factor, the key parameters in complex electromagnetic environment of accurate, stable and reliable monitoring of high voltage substations dielectric loss factor is a hot spot in the process of the on-line monitoring of power system.This article is based on capacitive equipment insulation online monitoring technology, analyzes the present situation of research made the capacitive equipment insulation online monitoring system. Complete test terminal system hardware and software research and development; Realize the effective signal extraction, design a small current effective zero flow sensor; Learning the harmonic analysis method of dielectric loss detection technology; Synchronous detection method based on data fusion algorithm design, the reference signal to compensate fluctuation error. On software design, system management and the development of diagnostic software, makes analysis on the basis of the troubleshooting and maintenance procedures.