Passive frequency domain dielectric spectrum online measurement and analysis system and method

Abstract

The invention discloses a passive frequency domain dielectric spectrum online measurement and analysis system, which comprises a voltage data acquisition system, a current data acquisition system anda host, wherein the voltage data acquisition system utilizes voltage dividing effects of a CVT high voltage arm and a low voltage arm for voltage data acquisition; the voltage data acquisition systemcomprises a voltage data acquisition module; the data acquisition end of the voltage data acquisition module is connected between a high voltage arm capacitor C1 and a low voltage arm capacitor C2; and the output end of the voltage data acquisition module is connected to the host through an optical fiber. Power grid disturbances and higher harmonics of the system itself are non-invasively utilizedas excitation sources of different frequencies, response current under corresponding excitation is acquired, the FDS data of the device can be effectively analyzed, and thus, online monitoring and evaluation on the oil paper insulation state of the power device can thus be realized.

Description

technical field [0001] The invention belongs to the field of electric equipment state evaluation, in particular to a passive frequency-domain dielectric spectrum online measurement and analysis system and method. Background technique [0002] Since the 21st century, my country's national economy has developed rapidly, and the demand for electric energy in all walks of life has continued to increase, which has promoted the continuous expansion of the installed capacity of electric power and the scale of the power grid. The safe and stable operation of the power system is the basis for ensuring high-quality and reliable power supply and an important guarantee for the development of the national economy. The collapse of the power grid and large-scale power outages will not only cause huge economic losses, but also endanger public safety, affect people's normal life, and cause serious social losses. Statistical analysis on the operation of the State Grid Corporation of China sh...

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Problems solved by technology

[0004] However, the existing FDS test method can only perform offline measurement after a power failure, and cannot realize the online evaluation and real-time early warning of the insulation state of the equipment

Offline measurement is not only complicated to operate, but also a power outage will bring certain economic losses

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