Transient ground wave partial discharge charged detection is a method for detecting partial discharge phenomena in power equipment. The following is a detailed method for transient ground wave partial discharge charged detection:

1. Basic principle
When partial discharge occurs inside power equipment, the charged particles generated by the discharge will quickly transfer from the charged body to the grounded non-charged body, and form high-frequency current traveling waves in the non-charged body. These current traveling waves are mainly concentrated on the inner surface of the metal shell of the equipment due to the skin effect and generate transient ground voltage. The size of the transient ground voltage signal is directly related to the intensity of the partial discharge and the location of the discharge point. Therefore, the partial discharge situation inside the equipment can be judged by detecting the transient ground voltage signal.

2. Detection method
Instrument preparation:
Use a special transient ground voltage sensor for detection.
Ensure that the instrument is complete and functional, and connect all parts of the detection instrument.
Environmental preparation:
If conditions permit, turn off the lighting and ventilation equipment in the detection area to avoid interference with the detection work.
Test the background value in the environment (air and metal) to eliminate interference from environmental factors.
Detection steps:
Place the transient ground voltage sensor close to the outer surface of the metal shell of the device being tested.
Keep the sensor and the device shell relatively still and avoid moving the sensor during the detection process.
Observe the detected signal on the display interface and record the data after the reading is stable.
If an abnormal signal is found, multiple and multi-point detections should be performed on the device to find the location of the maximum signal point and record the abnormal signal and the detection location.
Data analysis:
Analyze the detected transient ground voltage signal to determine the intensity and location of the partial discharge.
The longitudinal analysis method or the transverse analysis method can be used to compare and analyze the test results. The longitudinal analysis method compares the test results of the same device at different times to determine the operating status of the equipment; the transverse analysis method compares the test results of similar equipment in the same area to find out the equipment that may have defects.
III. Precautions
During the detection process, the human body cannot touch the transient ground voltage sensor to avoid interference with the test results.
The location of each detection point should be kept consistent as much as possible to facilitate comparative analysis.
When conducting live detection, safety measures should be in place to avoid electric shock accidents.
IV. Application and Advantages
The transient ground wave partial discharge live detection technology is widely used in partial discharge detection of power equipment such as high-voltage switchgear and transformers. Its advantage is that it can realize live detection of equipment without power outage, thereby improving the efficiency and reliability of detection. At the same time, this technology also has the advantages of simple principles, convenient installation and operation, and low cost.

In summary, transient ground wave partial discharge live detection is an effective method for partial discharge detection of power equipment. This method can timely detect partial discharge phenomena inside the equipment, providing an important basis for equipment maintenance and overhaul.