Design Of Intelligent Test Device For Disconnector

Disconnector is the maximum amount equipment of the substation, its failure rate is at the top. For outdoor disconnector transmission links directly exposed to the atmosphere, experiencing rain, infrequent operation, bearings and other transmission parts lack of lubricate and relative motion. So its operation jam fault is more happen. In recent years power grid maintenance mode change,devote major efforts to developing condition based maintenance. Existing status detection method rely on infrared, contact resistance, ultrasound, but mechanical failures are not an effective monitoring tool. In order to avoid blackouts happen, need to detection disconnector drive system status.The research mainly content: analyze disconnector mechanical structure, the disconnector mechanical state can be portrayed through operating force, the input power of the motor and rotation angle of disconnector operating mechanism. Design and development the testing device,we can measure the same time point operating force(or torque), the input power, and rotation angle. At every time point we can get the torque and its corresponding rotation angle. And we can also get input power and its corresponding rotation angle. Use the rotation angle of disconnector operating mechanism as abscissa, operating force, the input power of the motor as ordinate, we can draw operation torque and rotational angle relationship curve m(θ), draw input power and rotational angle relationship curve p(θ). The m(θ) and the p(θ) collectively known as disconnector mechanical characteristics curve. Measure and draw curve p(θ) and m(θ) of the selected a type of disconnector which is adjustment to perfect state by professional, it can be call as this type of disconnector standard curve. With the increase of running time, the disconnector mechanical state will change. and the curve p(θ) and m(θ) Significant changes through compare with standard curve.Building.the software systems and databases. Analysis mechanical characteristics in real time, compared with the standard curve. Maintenance and designer can analyses the status of disconnector by compare mechanical characteristic curves, contact pressure and closing force values change.