A relay contact performance detection device for a relay protection device

Abstract

The invention discloses a relay contact performance detection device for a relay protection device. The DC 220V voltage is connected to one end of the relay contact through a first control switch, the other end of the relay contact is connected to a 30W circuit and a 1000W circuit, and the 1000W circuit Connected to the relay contact through the second control switch, the action and shutdown of the relay contact are controlled by the relay protection device; the DC voltage transmitter is used to collect the voltage of the relay contact; the EV event manager regulates the event through PWM waves The circuit output drives the control switch; the voltage acquisition circuit outputs to the ADC module; the switch state of the control switch is fed back to the IO port of the DSP controller through the digital circuit; the communication module of the DSP controller communicates with the host computer through the Ethernet circuit. The invention is used for judging whether the relay has been damaged, and counting the action times of the relay, so as to facilitate the detection of the contact of the relay for relay protection.

Description

technical field [0001] The invention relates to a relay contact performance detection device for a relay protection device, belonging to the technical field of relay performance detection. Background technique [0002] At present, with the continuous development of smart grids, relay protection devices are becoming more and more intelligent, and relay protection devices provide technical support for the reliable operation of power systems. The relay protection device quickly finds the fault point by collecting the voltage and current status, and realizes the protection tripping and closing function. Whether the tripping and closing can be performed normally is related to the safety of the power grid system, so the reliability of the tripping and closing exit circuit of the device is also very important. Especially important, the existing power system basically uses relay contacts as the trip outlet, so the performance of relay contacts has become an indispensable part of eva...

AI Technical Summary

Problems solved by technology

[0003] There is no perfect test method for the performance assessment of the relay contacts used in the relay protection device in the power system. Therefore, in order to provide a relay contact performance detection device for the power system industry, it is a subject that must be studied in the current power system industry.

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