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Distributed power supply no-voltage tripping switch

A technology of distributed power supply, voltage loss and tripping, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as inconvenient use and management, unfavorable operation rate and reliability of residual current protection devices, etc., to expand protection. face, improve the operation rate and reliability, and improve the effect of safety protection performance

Inactive Publication Date: 2020-11-06
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is very inconvenient in use and management, which is not conducive to improving the operation rate and reliability of residual current protection devices

Method used

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  • Distributed power supply no-voltage tripping switch
  • Distributed power supply no-voltage tripping switch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] like figure 1 Shown is a schematic diagram of the system of this embodiment, which includes a controller, a residual current detection circuit electrically connected to the controller, a disconnection control output circuit, and a reclosing control output circuit.

[0017] The residual current detection circuit detects the residual current value and transmits it to the controller; the disconnection control output circuit outputs the disconnection signal according to the controller command to drive the disconnection mechanism to disconnect the circuit; the reclosing control output circuit outputs the reclosing signal to drive the reclosing according to the controller command The gate mechanism turns on the circuit.

[0018] The controller sets the 5 gear limits as shown below, the controller tracks the residual current value detected by the residual current detection circuit in real time, and the controller determines the suitable gear according to the received residual ...

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Abstract

The invention relates to a distributed power supply no-voltage tripping switch. The distributed power supply no-voltage tripping switch comprises a controller, and a residual current detection circuit, a disconnection control output circuit and a reclosing control output circuit which are electrically connected with the controller respectively. According to the invention, the characteristic of automatically determining a proper action value gear according to line residual current change caused by reasons such as season and weather changes can be realized; when dangerous ground fault electric leakage occurs in the line, the protection device acts under an ideal action value gear, the difficult problem in use management is solved, and the residual current is automatically tracked and fixed,so that the operation rate and reliability of the residual current protection device are greatly improved, the protection surface is enlarged, and the safety protection performance of the residual current of a power supply line is improved.

Description

technical field [0001] The invention relates to the technical field of power safety, in particular to a voltage loss trip switch of a distributed power source. Background technique [0002] At present, the country's promotion and use of new energy are becoming more and more popular. Distributed power grid-connected technology means that distributed power is connected to the distribution network and ensures the safe and reliable operation and power quality of the distribution network with distributed power. Qualified technical measures. The traditional distribution network is a passive network that distributes electricity to users and that power flows in one direction. The access of distributed power sources makes the distribution network an active network with two-way power flow, and it also brings voltage fluctuations. , Relay protection malfunction or refusal to act and other technical problems. Influence of distributed power supply access on distribution network, active...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02H7/26
CPCH02J3/381H02H7/26H02J2300/20
Inventor 孙洪昌刘红旗王洋李儒金李英超田文娜王新玲李欣桐张国营
Owner STATE GRID SHANDONG ELECTRIC POWER