A condition monitoring algorithm based on image geometric analysis for substation switch

For the problem of real-time monitoring and condition decision of high-voltage substation switches, a real-time monitoring algorithm is proposed for the substation folded switch based on geometric analysis of monitoring images. Firstly, capture images containing the folded switch using the properly installed camera, and transfer them to the data processing terminal. Then, search for straight line segments representing two arms of switch using the method of image contour description, and calculate the angles between the segments using the cosine theorem. At last, determine the condition of the switch that whether it is closed well. The experimental results show that the proposed method could accurately calculate the real-time angle of the switch, and then achieve unmanned and real-time monitoring for condition of the switch.