The pulse current method is a quantitative measurement, which mainly measures the partial discharge amount, which can objectively reflect the insulation state of electrical equipment. Therefore, this method has been widely recognized and widely used in the current power industry, and partial discharge tests based on the pulse current method are often used in type testing, factory testing and other offline tests of electrical equipment.
Partial discharge is not only an important factor causing insulation deterioration, but also an early symptom of insulation deterioration, so partial discharge monitoring of power equipment is an important means to monitor and evaluate the insulation status of power equipment. At present, the pulse current method is mainly used for partial discharge measurement of equipment such as switchgear, ring main unit and transformer in power equipment, which not only has high sensitivity but also is easy to install and related sensor equipment, which is very convenient.
Shaanxi public design and development of a safety device that can reflect whether the electrical equipment has operating voltage - pulse partial discharge and temperature monitoring device, real-time monitoring of the internal partial discharge, temperature, live state and fault state of the switchgear. It can find the insulation defects of the switchgear in time, provide data basis for the maintenance of the switchgear, assist the operation and maintenance personnel of the auxiliary power system to intuitively judge whether there is partial discharge and other abnormal phenomena inside the switchgear, and provide reference for evaluating and judging the insulation level and aging degree of the switchgear.
The device adopts RS485 communication mode or Modbus-RTU communication protocol to facilitate data dockingAmong them, the fault current sensor is connected to the host by optical fiber, and the temperature sensor is wirelessly connected, which can ensure safety and avoid the existence of hidden insulation hazards. The pulse method partial discharge and temperature monitoring device adopts the partial discharge monitoring technology based on the pulse current method, and can give a graded alarm according to the amplitude, frequency and temperature data of the measured partial discharge.