Key Technologies for Optimal Design and Stable Cooperative Operation of Broadband Current Array Sensing System

A new design method of internet of things (IOT) sensor is proposed, various equipment in substation can be abstracted as a complex system composed of directly or indirectly connected equipment nodes, the widely arranged broadband current sensors are used to monitor the current characteristics of high-frequency partial discharge, leakage current and relative dielectric loss of each equipment nodes which are extracted to form a sensor array based on electric flow. System engineering theory is proposed to design the array sensor and is used to optimize layout and operation stability analysis. The designed model and interpretation structure model of IOT sensor system are constructed, based on the state equation or transfer function of the sensor array, the operation stability observation method of the sensor under the missing elements, slight disturbance and severe disturbance is proposed.