Development of the integrated online-monitoring system for the insulation of power equipment in the transformer substation

The online-monitoring of a whole transformer substation using separated systems will face the redundancy of the constructional functions and the difficulties of realization, so the integrated online-monitoring system of the key power equipment is very important. This paper introduced an online-motoring system of the insulation of the power equipments based on the NI-PXI measurement and control bus. It used the NI Measurement Studio/NI-DAQ and VISA to realize the signal acquisition with data acquisition cards and oscilloscopes. This system can measure the characteristic signals of the insulation in the low and high/ultrahigh frequency. This paper also describes a scheme of network management in the substation and the communication between substations. The design and research of the integrated system ensure the specialized construction of the specialized network for the monitoring of condition of the power equipment and the safe operation of the power equipment.