Research And Application Of Real-time Detection System For Electrical Equipment Grounding Based On Non-contact Electrostatic Detecting Technology

In power system,whether the electrical equipment grounding device is reliable and safe plays an important role in stable operation of electrical equipment.Standard electrical equipment grounding device affects not only the normal operation of electric equipment but also the operators and maintenance staff safety of life.According to the phenomenon that the monitoring method of the electrical equipment grounding condition is relatively simple,difficult and laborious,a system or device which can detect the grounding state in real time is proposed.Non-contact detection of ground is a good method of electrostatic induction and air ionization of two,this paper is the use of non-contact electrostatic induction detection of this method,select the appropriate sensor,the electrostatic sensor output signal is relatively weak,and by the external environment Influence,which led to a large number of noise signals and other interference signals.So the signal acquisition system to the electrostatic sensor output signal before the need for its appropriate treatment to reduce the interference signal,by detecting the probe and the detection equipment to detect the electric field to detect the charged body surface voltage dropIn this article,the stability of the ground impedance monitoring system is controlled by a variety of auxiliary circuits to control the work,including analog and digital circuits and single-chip signal processing and optimization of its timely to achieve the desired ideal state,and meet The precision value of the electric field measurement can be directly used for monitoring and measurement.After using the electrostatic induction technology to collect the grounding impedance,a non-contact earthing real-time monitoring system is designed according to the direction of automatic detection using wireless transmission technology and modern electronic technology.The system set up a number of observation stations to collect,each observation station are installed an electrostatic in duction tester for grounding impedance monitoring.In this article,the circuit composition of the detection system,a series of optimization,making the measurement,the maximum extent possible to eliminate a variety of variable factors for the electric f ield measurement interference,improved in the electric field measurement of the corresponding accuracy.At the same time,the monitoring device can compare with the data sent by the electrostatic detector according to the data stored by itself,so as to o btain the information that the device is grounded reliable.The process of remote multi-point test is from the above information eventually through the communication line to the computer monitoring room,the computer center can also send all the measuremen t signals to the various lines,the terminal to adjust.The staff can pass the computer's software interface,real-time operation control,can get the current ground.