Primary equipment intelligent interface device in substation

Abstract

The invention provides a primary equipment intelligent interface device in a substation. The device comprises a driving-in module, a state collecting module, a communication module, a driving-out module, a man-machine interface module, and a data and logic processing module which are connected through a bus. According to the primary equipment intelligent interface device in the substation, logic operation is used for replacing a traditional electromagnetic relay circuit, so that the state of primary equipment of the substation can be detected. The device has a self-detection function and a communication function, can effectively overcome the defects that the number of failures of a traditional relay circuit is large, and the failures in operation can not be detected, can detect the state of a switch and other primary equipment in real time, simplifies a circuit, simplifies installation, improves efficiency of operation on the primary equipment, and improves the reliability of operation of the primary equipment.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to an intelligent interface device for primary equipment in a substation. Background technique [0002] At present, the connection between the primary equipment and the secondary equipment in the substation, such as the switch, the local operation of the knife switch, the electrical interlocking circuit, etc., mostly uses a circuit composed of electromagnetic relays, and passes through several layers of resetting. This multiple reset circuit composed of electromagnetic relays has the following disadvantages: [0003] 1. Electromagnetic relays are affected by operating conditions and years, which can easily cause contact jamming, insulation reduction, burning, etc., and the reliability cannot be guaranteed continuously; [0004] 2. The inherent time delay of the electromagnetic relay may increase with the increase of the operation period and the weakening of the mechanical s...

AI Technical Summary

Problems solved by technology

[0003] 1. Electromagnetic relays are affected by operating conditions and years, which can easily cause contact jamming, insulation reduction, burning, etc., and the reliability cannot be guaranteed continuously;

[0004] 2. The inherent time delay of the electromagnetic relay may increase with the increase of the operation period and the weakening of the mechanical stress, especially for the uncontrollable influence on the reliability of protection opening and closing;

[0006] 4. It does not have the function of monitoring and counting primary equipment state quantities such as switch opening / closing current, opening / closing time, energy storage suppression time, etc., which is not conducive to timely discovery of potential hidden dangers of switches;

[0007] 5. It is impossible to monitor and send an alarm signal when the control circuit of the knife switch and ground knife is disconnected or the intermediate relay is damaged, especially for the situation that the insulation of the relay is reduced and the malfunction is not detected in advance.

[0008] 6. The number of auxiliary contacts used is large, the circuit and installation and construction are complicated

From years of operating experience, it can be found that various problems in the auxiliary secondary circuit will reduce the reliability and operating life of the entire primary equipment, thus affecting the entire life cycle of equipment assets

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