For improving the operational reliability of wind turbines

it is of great significance to develop on-site detection technology for insulation state of wind generator. Through analyzing the on-site test methods of non-destructive insulation characteristic parameters of doubly-fed wind generator

including the insulation resistance

dissipation factor

partial discharge and pulse waveform comparison

an integrated detection device for wind generator insulation state on-site detection was designed and developed in this paper. The device consists of four modules

including power module

signal measurement module

data acquisition module and software analysis module. The power supply module provides the high voltage test power supply needed for multi-parameter detection

and each parameter is measured separately. Then

this integrated detection device is applied in on-site test for the in-service doubly-fed wind generator in the wind farm

and the test results show that this device is suitable for on-site detection of wind generator insulation characteristic parameters

such as insulation resistance and polarization index

dielectric loss factor

capacitance

partial discharge and pulse waveform

and the detection accuracy meets the actual requirements. In practical application

the device can comprehensively evaluate the insulation state of the generator

which avoids the one-sidedness of single parameter evaluation

and has a high degree of integration.