CN203339793U - An apparatus for switching double DC power supplies in parallel - Google Patents
An apparatus for switching double DC power supplies in parallel Download PDFInfo
- Publication number
- CN203339793U CN203339793U CN2013203463415U CN201320346341U CN203339793U CN 203339793 U CN203339793 U CN 203339793U CN 2013203463415 U CN2013203463415 U CN 2013203463415U CN 201320346341 U CN201320346341 U CN 201320346341U CN 203339793 U CN203339793 U CN 203339793U
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- diode
- air switch
- direct current
- parallel
- voltmeter
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Abstract
The utility model relates to an apparatus for switching double DC power supplies in parallel. The apparatus comprises a diode D1, a diode D2, a diode D3, a diode D4, a voltmeter V1, a voltmeter V2, a DC air switch QK1, and a DC air switch QK2. The diode D1, the DC air switch QK1, and the diode D3 are successively connected in series in order to form a DC system 1. The voltmeter V1 is connected with the DC air switch QK1 in parallel. The diode D2, the DC air switch QK2, and the diode D4 are successively connected in series in order to form a DC system 2. The voltmeter V2 is connected with the DC air switch QK2 in parallel. The DC system 1 and the DC system 2 are connected in parallel and then are connected with a photoelectric conversion device. The apparatus has advantages that when a first power input generates faults or is powered off, the apparatus is switched to the other power supply so as to achieve uninterruptible power input for achieving continuous operation of a device and increasing the safe reliability of a power grid.
Description
Technical field
The utility model relates to a kind of direct-current dual power switching device shifter arranged side by side, relates in particular to a kind of direct-current dual power switching device shifter arranged side by side of the photoelectric conversion device for 220kV system pilot protection system.
Background technology
At present, the main protection that optical fiber pilot protection is the 220kV circuit, in optical fiber pilot protection, the direct current communication power supply of photoelectric conversion device input DC48V is provided by a road single supply, and reliability is on the low side.
If in optical fiber pilot protection, the input of direct current communication power supply is broken down, photoelectric conversion device loses power supply, and a whole set of pilot protection, by out of service, if now break down, can affect unit trip.Only have the DC power supply of realization uninterruptedly to input, the normal operation continuously of guarantee equipment, the security reliability of raising protective device.
Summary of the invention
For overcoming the deficiencies in the prior art; the purpose of this utility model is to provide a kind of direct-current dual power switching device shifter arranged side by side; the direct current communication power supply DC48V that realizes the photoelectric conversion device in 220kV system pilot protection device uninterruptedly inputs, and power consumption equipment can be run without interruption continuously.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of direct-current dual power switching device shifter arranged side by side, comprise diode D1, diode D2, diode D3, diode D4, voltmeter V1, voltmeter V2, direct current air switch QK1, direct current air switch QK2, diode D1, direct current air switch QK1, diode D3 connect successively and form direct current system one, and voltmeter V1 is in parallel with direct current air switch QK1; Diode D2, direct current air switch QK2, diode D4 connect successively and form direct current system two, and voltmeter V2 is in parallel with direct current air switch QK2; Direct current system one is connected with photoelectric conversion device with after direct current system two parallel connections.Compared with prior art, the beneficial effects of the utility model are:
Realized that by connecting this device DC power supply uninterruptedly inputs, be about to another road DC power supply and introduce this device, then outputed in communication power supply by this device.When the input of first via power supply is broken down or is cut off the power supply, be switched on another road power supply by this device, thereby realize the uninterrupted power supply input, make equipment can realize continuous operation, improve the power grid security reliability.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with Figure of description, the utility model is described in detail, but should be noted that enforcement of the present utility model is not limited to following execution mode.
See Fig. 1, a kind of direct-current dual power switching device shifter arranged side by side, comprise diode D1, diode D2, diode D3, diode D4, voltmeter V1, voltmeter V2, direct current air switch QK1, direct current air switch QK2, diode D1, direct current air switch QK1, diode D3 connect successively and form direct current system one, and voltmeter V1 is in parallel with direct current air switch QK1; Diode D2, direct current air switch QK2, diode D4 connect successively and form direct current system two, and voltmeter V2 is in parallel with direct current air switch QK2; Direct current system one is connected with photoelectric conversion device with after direct current system two parallel connections.
This device accesses two groups of different DC48V power supplys by the two-way input interface, direct current air switch QK1, QK2 by separately is input to the power supply shunt circuit again, it is arranged side by side that the loop formed by four diode D1-D4 completes the output of two-way power supply, and realize the isolation of electric power loop separately.
This device, by the input voltage of voltmeter V1, V2 real time monitoring two-way power supply, shows the input voltage of every road DC power supply; And monitor respectively the intact of two-way electric power loop by the auxiliary contact of direct current air switch QK1 and QK2.After a road power supply broken string, another road power supply can be exported in continual situation, and guarantees that the two-way power supply is separate.
Claims (1)
1. a direct-current dual power switching device shifter arranged side by side, it is characterized in that, comprise diode D1, diode D2, diode D3, diode D4, voltmeter V1, voltmeter V2, direct current air switch QK1, direct current air switch QK2, diode D1, direct current air switch QK1, diode D3 connect successively and form direct current system one, and voltmeter V1 is in parallel with direct current air switch QK1; Diode D2, direct current air switch QK2, diode D4 connect successively and form direct current system two, and voltmeter V2 is in parallel with direct current air switch QK2; Direct current system one is connected with photoelectric conversion device with after direct current system two parallel connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203463415U CN203339793U (en) | 2013-06-17 | 2013-06-17 | An apparatus for switching double DC power supplies in parallel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203463415U CN203339793U (en) | 2013-06-17 | 2013-06-17 | An apparatus for switching double DC power supplies in parallel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203339793U true CN203339793U (en) | 2013-12-11 |
Family
ID=49708448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203463415U Expired - Lifetime CN203339793U (en) | 2013-06-17 | 2013-06-17 | An apparatus for switching double DC power supplies in parallel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203339793U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707083A (en) * | 2016-12-28 | 2017-05-24 | 国家电网公司 | Substation direct current grounding detecting device |
| CN107534461A (en) * | 2015-05-12 | 2018-01-02 | 日本电气株式会社 | Supply path switching device, supply path switching system and supply path switching method |
-
2013
- 2013-06-17 CN CN2013203463415U patent/CN203339793U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107534461A (en) * | 2015-05-12 | 2018-01-02 | 日本电气株式会社 | Supply path switching device, supply path switching system and supply path switching method |
| CN106707083A (en) * | 2016-12-28 | 2017-05-24 | 国家电网公司 | Substation direct current grounding detecting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |
|
| CX01 | Expiry of patent term |