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Silicon chain open circuit protection device

A technology of open circuit protection and silicon chain, which is applied in the direction of emergency protection circuit devices, circuit devices, sustainable buildings, etc., can solve problems such as control bus power failure, and achieve the effect of solving open circuit faults, good economy, and simple structure

Active Publication Date: 2021-05-28
STATE GRID JIANGSU ELECTRIC POWER CO LTD TAIZHOU POWER SUPPLY BRANCH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the step-down silicon chain fails, it will cause the control bus to lose power

Method used

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  • Silicon chain open circuit protection device

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Embodiment Construction

[0025] Such as figure 1 As shown, the silicon chain circuit 6 in this embodiment is connected in series between the closing bus and the control bus. This embodiment includes a power supply unit 1 , a central processing unit 2 , a detection unit 3 , an execution unit 4 and a backup link 7 .

[0026] The power supply unit 1 is used to supply power to the central processing unit 2 . The input end of the power supply unit 1 is connected to the closing bus, and the voltage is converted into 24V DC and then output to the central processing unit 2 .

[0027] The detection unit 3 is used to detect whether the silicon chain circuit 6 is normal. The detection unit 3 in this embodiment uses a voltage detection module 31 and a current detection module 32 to simultaneously detect voltage and current. The input end of the voltage detection module 31 is connected to the control bus, and the output end is connected to the central processing unit 2 for detecting whether the voltage in the cir...

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Abstract

The invention belongs to the field of circuit protection, and particularly relates to a silicon chain open circuit protection device. The silicon chain open circuit protection device provided by the invention is a voltage stabilization protection device which can generate related protection actions when a voltage reduction silicon chain has an open circuit fault, and can prevent a direct current system from controlling a bus to lose power. According to the silicon chain open circuit protection device provided by the invention, a silicon chain circuit is connected in series between a closing bus and a control bus, and the silicon chain open circuit protection device comprises a standby silicon chain, a power supply unit, a central processing unit, a detection unit and an execution unit. The silicon chain open circuit protection device uses the control bus voltage and the silicon chain current as the main criterion for judging whether the silicon chain is broken, and is accurate and reliable. The device is simple in structure and clear in indication, does not generate additional influence on an original loop, and can send out an alarm signal when a fault occurs. The device has both economical efficiency and practicability. The whole device has good economical efficiency, is convenient to replace, can be installed during the operation of a transformer substation direct current system, and can effectively solve the problem of silicon chain open-circuit fault.

Description

technical field [0001] The invention belongs to the field of circuit protection, and in particular relates to a silicon chain open circuit protection device. Background technique [0002] The function of the DC system of the substation is to supply power to the secondary equipment in the station and to operate and control the primary equipment. The DC system bus is divided into a closing bus and a control bus. The voltage of the closing bus is usually between DC 242-254V, and the control bus is in the station. The secondary equipment provides power, and the rated voltage is generally 220V DC (220V system) or 110V DC (110V system). Usually, a step-down silicon chain is connected in series between the closing busbar and the control busbar to meet the voltage requirements of the control busbar. The step-down silicon chain is composed of multiple diodes in series. In order to reliably adjust the bus voltage, it is generally divided into 5 levels, and each level can be adjusted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02J13/00
CPCH02H7/268H02J13/00036H02J13/00001H02J13/00016Y04S40/124Y02B90/20
Inventor 吴笑天徐新王昱陈玮常莎蔡乙立温荣超魏圣泰张蕾陆波卞亚芳殷楷刘卉印吉景卜鑫链钱志斌陈亮
Owner STATE GRID JIANGSU ELECTRIC POWER CO LTD TAIZHOU POWER SUPPLY BRANCH
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