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Two-section direct-current power supply bus open-circuit protection system with step-down silicon chain

A DC power supply and open-circuit protection technology, applied in circuit devices, emergency power supply arrangements, control/regulation systems, etc., can solve problems such as voltage loss, achieve reliable voltage loss, ensure continuity, and solve the effects of voltage loss

Pending Publication Date: 2020-03-13
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a two-stage DC power supply bus with step-down silicon link open-circuit protection system, which can safely and reliably solve the problem of control bus failure due to step-down silicon link open-circuit faults and other reasons. The problem of voltage loss improves the operational reliability of the DC power system of the substation

Method used

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  • Two-section direct-current power supply bus open-circuit protection system with step-down silicon chain
  • Two-section direct-current power supply bus open-circuit protection system with step-down silicon chain
  • Two-section direct-current power supply bus open-circuit protection system with step-down silicon chain

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Embodiment Construction

[0028] Attached below Figure 1-4 The specific implementation manner of the present invention will be described in further detail.

[0029] Depend on Figure 1-4 Given, the present invention provides the following technical solutions: a novel two-section DC power supply bus with step-down silicon link open circuit protection system, including the first section of DC power supply bus, the second section of DC power supply bus and step-down silicon link open circuit protection bidirectional DC / DC device, step-down silicon chain open-circuit protection bidirectional DC / DC device includes a monitoring unit, a bidirectional DC converter and a control unit, the first section of the DC power bus and the second section of the DC power bus are electrically connected to the input of the monitoring unit, monitoring The output end of the unit is electrically connected to the input end of the control unit, and the output end of the control unit is electrically connected to the bidirectio...

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Abstract

The invention discloses a two-section direct-current power supply bus open-circuit protection system with a voltage reduction silicon chain. The system comprises a first-section direct-current power bus, a second-section direct-current power bus and a step-down silicon chain open-circuit protection bidirectional DC / DC device, the step-down silicon chain open circuit protection bidirectional DC / DCdevice comprises a monitoring unit, a bidirectional DC converter and a control unit. The output end of the monitoring unit is electrically connected with the input end of a control unit, the output end of the control unit is electrically connected with a bidirectional direct-current converter, and the bidirectional direct-current converter is connected between the first section of direct-current power bus and the second section of direct-current power bus in a bridging mode. The bidirectional direct-current converter is novel in structure and ingenious in conception, the bidirectional direct-current converter is started immediately and supplies power to the fault section bus when power supply of the control bus is abnormal due to open circuit of a voltage reduction silicon chain of a certain section of direct-current bus, so that power supply continuity of the direct-current bus is guaranteed, and the purpose of mutual spare power automatic switching uninterrupted power supply of two sections of direct-current power buses is achieved.

Description

technical field [0001] The invention relates to the technical field of direct current power supply systems, in particular to a novel two-stage direct current power supply bus with step-down silicon link open-circuit protection system. Background technique [0002] In order to ensure the safe operation of the power system, the control and protection equipment of power plants and substations are powered by DC power. At present, in the DC power supply system with dual charging, dual electricity and dual buses, the two sections of DC power buses are mutually backed up by manual bus tie switches. When the step-down silicon link is open, it will lead to the loss of power of the DC power bus, which will lead to the failure of various control and protection devices, and expand the fault range of the substation. This system architecture can no longer meet the needs of safe power supply of the DC power system. [0003] At present, the open-circuit protection of the step-down silicon ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06H02H7/22H02M3/28H02M3/315
CPCH02H7/22H02J9/06H02M3/28H02M3/315
Inventor 刘玮张建华陈寿平苏俊妮邱育义郭志军梅成林周凯锋熊伟标刘建锋李欧李崇仁尹照新梁广贤周伟彬
Owner GUANGDONG POWER GRID CO LTD
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