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A relay protection exit blocking circuit

A blocking circuit and relay protection technology, applied in the direction of emergency protection circuit devices, circuit devices, electrical components, etc., can solve the problems of wrong control instructions of the controller, sensitive controllers, external equipment or circuit damage, etc., to reduce output errors. Signal probability, effect of improving stability

Active Publication Date: 2018-01-19
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the development of power technology, the control circuit in the power system is becoming more and more complex, the controller in the control circuit is becoming more and more sensitive, and it is more and more susceptible to external interference, which makes the controller output wrong control due to its susceptibility to interference. Instructions, resulting in the export relay controlled by the controller outputting wrong signals and causing damage to external equipment or circuits, affecting the stability of the power system

Method used

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  • A relay protection exit blocking circuit
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  • A relay protection exit blocking circuit

Examples

Experimental program
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Effect test

Embodiment 1

[0049] See figure 1 , which shows a schematic diagram of the hardware implementation of the relay protection exit blocking circuit provided by this application. The relay protection exit blocking circuit includes: a main controller U1, a blocking controller U2, a first outlet power relay U3, a second outlet power relay U4 and exit relay CJ1.

[0050] In this embodiment, the main controller U1 is connected to the locking controller U2 and the first side of the control terminal of the first outlet power relay U3 respectively.

[0051] The second side of the control terminal of the first outlet power relay U3 is connected to the outlet relay power supply, the first node of the first outlet power relay U3 is connected to the outlet relay power supply VCC, and the second side of the first outlet power relay U3 The node is connected to the node of the second outlet power supply relay U4.

[0052] The control end of the second outlet power relay U4 is connected to the locking contr...

Embodiment 2

[0058] In this embodiment, another kind of relay protection exit blocking circuit is expanded on the basis of the relay protection exit blocking circuit shown in the first embodiment, please refer to figure 2 , which shows another hardware implementation schematic diagram of the relay protection exit blocking circuit provided by the present application. On the basis of the relay protection exit blocking circuit shown in Embodiment 1, it also includes: a first control circuit 11, a second The control circuit 12 and the third control circuit 13.

[0059] The first input terminal of the first control circuit 11 is connected to the main controller U1, the second input terminal of the first control circuit 11 is connected to the system power supply VDD2 of the main controller, and the first control circuit The first output end of the circuit 11 is connected to the first side of the control end of the first outlet power relay U3, and the second output end of the first control circu...

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Abstract

The invention provides a relay protection outlet lockout circuit which comprises a master controller, a lockout controller, a first outlet power supply relay, a second outlet power supply relay and an outlet relay. The master controller is connected with the lockout controller and the first side of the control end of the first outlet power supply relay. The second side of the control end of the first outlet power supply relay is connected with a power supply of the outlet relay. The first node of the first outlet power supply relay is connected with the power supply of the outlet relay. The second node of the first outlet power supply relay is connected with the node of the second outlet power supply relay. The control end of the second outlet power supply relay is connected with the lockout controller and a system power supply of the lockout controller. The node of the second outlet power supply relay is connected with the first side of the control end of the outlet relay. The second side of the control end of the outlet relay is connected with the master controller. The probability that the master controller controls the outlet relay to output error signals is lowered, and the electrical power system stability is improved.

Description

technical field [0001] This application relates to the field of relay protection circuit hardware design, in particular to a relay protection exit blocking circuit. Background technique [0002] With the rapid development of the national economy, all walks of life are more and more dependent on electricity, so the requirements for the stability of the power system are also getting higher and higher. [0003] However, with the development of power technology, the control circuit in the power system is becoming more and more complex, the controller in the control circuit is becoming more and more sensitive, and it is more and more susceptible to external interference, which makes the controller output wrong control due to its susceptibility to interference. Instructions cause the outlet relay controlled by the controller to output wrong signals and cause damage to external equipment or circuits, which affects the stability of the power system. [0004] It can be seen from the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H1/00
Inventor 裘愉涛徐成斌潘武略刘宏君王悦王乾刚方天宇郑玉成周富强刘辉
Owner STATE GRID CORP OF CHINA