Remote Online Monitoring System for Mechanical Characteristics of Operating Mechanism in GIS High Voltage Disconnector

摘要

Open disconnector can observe the action state of disconnector by naked eye, but for the operating mechanism of gas insulated switchgear (GIS)high voltage disconnector, the working state of the operating mechanism cannot be observed because it is sealed in the insulating cylinder, and cannot be directly observed the separation and closure of dynamic and static contacts. In order to monitor the position status of the operating mechanism in real time, a current-based identification method is proposed. A new online monitoring method for mechanical characteristics of gas insulated switchgear high voltage disconnector operating mechanism technology is presented. This method uses current sensor to measure the current of driving motor and draw the current-time curve. Combining with angular displacement sensor, it can accurately judge the position and status of disconnector of gas insulated switchgear disconnector and whether the mechanism has broken rod and jammed or not. By using the envelope of current-time curve, the mechanical state of disconnector operating mechanism can be accurately reflected. It is of great significance to improve the safe operation of power system and meets the technical requirements of building ubiquitous power Internet of things in our country.