Switch cabinet local discharge transient-to-ground voltage detection system based on wireless network

Abstract

The invention relates to a switch cabinet local discharge transient-to-ground voltage detection system based on a wireless network, which is characterized in that: a signal collection unit is sequentially connected with a transient-to-ground voltage sensor, a filter circuit, an amplification circuit and an analog-to-digital conversion circuit in series, and an output end of the analog-to-digital conversion circuit is connected with a signal transmission unit; the signal transmission unit is provided with a general packet radio service (GPRS) transmitting device and a GPRS receiving device for receiving a signal transmitted by the GPRS transmitting device, a signal input end of the GPRS transmitting device is connected with the analog-to-digital conversion circuit of the signal collection unit, and an output end of the GPRS receiving device is connected with a data collection and analysis unit; the data collection and analysis unit adopts a computer or a high-speed digital signal processor (DSP) chip as a main processor; and a human-machine interface is used for displaying a detection result of the entire system. The switch cabinet local discharge transient-to-ground voltage detection system has high sensitivity of the sensors, can resist the interference, is safe, rapid and accurate to detect, is convenient for working personnel to operate and diagnose, and can realize the local discharge monitoring and location information collection of multiple parts inside a switch cabinet. Discharge fault can be discovered and eliminated in time.

Description

technical field [0001] The invention relates to a partial discharge transient ground voltage system of a switchgear, in particular to an on-line TEV partial discharge detection, which can monitor the change state of the partial discharge level in the operating switchgear at any time, and transmit it to the upper position through a wireless network Machine, and then describe the switchgear partial discharge transient ground voltage detection system based on wireless network from multiple angles. Background technique [0002] Electricity is the most important technical basis for production development and social change. With the rapid development of my country's economy, the automation construction and transformation of the electric power industry, power supply and power-consuming enterprises are constantly developing and improving, and the voltage level of electric equipment is also increasing. The reliability of power equipment operation puts forward more stringent requiremen...

AI Technical Summary

Problems solved by technology

There are many disadvantages in using this wired sensor: ① Due to the large number of monitoring points that need to be positioned in the switch cabinet, multiple sensors need to be installed in the switch cabinet, and it is very difficult to lead out a large number of cables, which not only increases the wiring cost, but also may cause the Insulation damage; ②With the passage of time, some sensors in the switch cabinet will inevitably age or fail, which will lead to the loss of monitoring parameters; ③After the general monitoring system is designed, it is difficult to add and adjust sensors. Configuration changes may require modification of the system software source program

These disadvantages of wired sensors limit the development of switchgear condition monitoring

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