CN203827050U - DEH two-way direct-current redundant power supply device - Google Patents
DEH two-way direct-current redundant power supply device Download PDFInfo
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- CN203827050U CN203827050U CN201420198416.4U CN201420198416U CN203827050U CN 203827050 U CN203827050 U CN 203827050U CN 201420198416 U CN201420198416 U CN 201420198416U CN 203827050 U CN203827050 U CN 203827050U
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- 238000006243 chemical reaction Methods 0.000 claims description 25
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model relates to a DEH two-way direct-current redundant power supply device. The power supply device comprises a direct-current power supply and an alternating-direct current converter. The positive electrode and the negative electrode are connected to a load through a diode D1 and a diode D2, respectively. An input terminal of the alternating-direct current converter is connected to an alternating-current power supply, and the positive electrode of an output terminal of the alternating-direct current converter is connected to a diode D3, while the negative electrode is connected to a diode D4. The cathode of the diode D3 is connected with the cathode of the diode D4, and the anode of the diode D4 is connected with the anode of the diode D2. The DEH two-way direct-current redundant power supply device provided by the utility model is simple in structure, and provides a second direct-current power supply for a DEH system, thereby ensuring the stability of power supply. A first direct-current power supply of the device is a direct current input from a direct-current bus, and the second direct-current power supply is a direct current converted from an alternating current through the alternating-current power supply, so that upon the detection of grounding conditions of the direct-current power supply, only the first direct current is detected, and circulation phenomena caused by direct connection of the two direct-current power supplies, and error alarms of grounding are prevented.
Description
Technical field
The utility model relates to a kind of electric supply installation, particularly a kind of DEH two-way direct current redundant power supply apparatus.
Background technology
DEH system is the Major Systems of power plant steam turbine, its Supply Security is in widespread attention, in existing DEH system adopt direct current 110V Power supplies more, once power supply break down very large existence hidden danger, therefore need to adopt two-way Power supply to improve its fail safe.Due to the particularity of direct current 110V power supply, the DC power switching device not satisfying condition in the market, because cannot ensure the requirement of site safety operation, two-way DC power supply can not directly connect by power transfer device.If utilize the characteristic of diode forward conducting, reverse cut-off, directly two-way DC power supply is together in parallel and powers for DEH system by diode, cannot use because easily cause DC earthing false alarm.
Utility model content
The utility model main purpose is to address the above problem and is not enough, and the fail safe of a kind of DEH of raising system power supply is provided, and prevents the DEH two-way direct current redundant power supply apparatus of false alarm.
For achieving the above object, the technical solution of the utility model is:
A kind of DEH two-way direct current redundant power supply apparatus, comprise DC power supply and DC-AC conversion device, the positive and negative polarities of described DC power supply connect load by diode D1, D2 respectively, the input of described DC-AC conversion device connects AC power, the output head anode of described DC-AC conversion device connects diode D3, negative pole connects diode D4, and the negative electrode of described diode D3 is connected with the negative electrode of diode D1, the anodic bonding of the anode of described diode D4 and diode D2.
Further, be provided with mains switch at the output of described DC-AC conversion device.
Further, be provided with power monitoring relay at the output of described DC-AC conversion device.
Further, DC-AC conversion device is WWL-LDX precision DC current regulator power supply.
To sum up content, a kind of DEH two-way direct current redundant power supply apparatus described in the utility model, simple in structure, for DEH system is provided with the second tunnel direct current supply, ensure its power supply reliability.Because first via direct current is the direct current accessing from DC bus, the second road direct current is alternating current to be converted to galvanic by DC-AC conversion device, so detecting DC power supply whether when ground connection, only can detect first via direct current, while effectively having avoided two-way DC power supply directly to connect, the circulation phenomenon of appearance and ground connection false alarm situation.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
As shown in Figure 1, DC power supply 1, AC power 2, DC-AC conversion device 3, power monitoring relay 4, load 5, mains switch K, diode D1-D4.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
As shown in Figure 1, a kind of DEH two-way direct current redundant power supply apparatus, comprises DC power supply 1, AC power 2, DC-AC conversion device 3, and wherein AC power 2 is 220V, and DC power supply 1 is 110V.The anode of the cathode connecting diode D1 of DC power supply 1, the negative electrode of diode D1 connects load 5, and the negative pole of DC power supply 1 connects the negative electrode of diode D2, the anodic bonding load 5 of diode D2.The input of DC-AC conversion device 3 connects AC power 2, the output head anode of DC-AC conversion device 3 connects the anode of diode D3, the negative electrode of diode D3 connects the negative electrode of diode D1, the negative pole of output end of DC-AC conversion device 3 connects the negative electrode of diode D4, the anode of the anodic bonding diode D2 of diode D4.
DC power supply 1 is the 110V direct current directly accessing from DC bus, AC power 2 is the 220V alternating currents from the access of UPS feeder cabinet, it is that load 5 is powered that this road 220V alternating current is converted to 110V direct current by DC-AC conversion device 3, for DEH system provides another road direct current supply, because this road direct current supply is alternating current to be converted to galvanic through DC-AC conversion device 3, so in the time that DEH electric power system detects, only can detect DC power supply 1, effectively avoid causing the situation of circulation phenomenon and DC earthing false alarm.
Redundant power supply apparatus described in the utility model provides two-way direct current power supply loop for DEH system, the first direct current power supply loop is made up of DC power supply 1 positive pole, diode D1, load 5, diode D2 and DC power supply 1 negative pole, and the second direct current power supply loop is made up of the negative pole of output end of output head anode, diode D3, load 5, diode D4 and the DC-AC conversion device 3 of DC-AC conversion device 3.Two-way direct current power supply loop is isolated by diode D1-D4, and two-way direct current power supply loop is DEH system load power supply simultaneously, Ruo Yi breaks down on road, and another road is without can, directly for DEH system load continues power supply, having improved the power supply reliability of DEH system switching time.
Be provided with mains switch K at the output of DC-AC conversion device 3, mains switch K is DC bipolar mains switch.Be provided with power monitoring relay 4 at the output of DC-AC conversion device 3, power monitoring relay 4 is for detection of power supply, as power supply breaks down transmission alarm signal to DCS.DC-AC conversion device 3 is WWL-LDX precision DC current regulator power supply.
As mentioned above, given scheme content, can derive similar technical scheme by reference to the accompanying drawings.In every case be the content that does not depart from technical solutions of the utility model, any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present utility model, all still belong in the scope of technical solutions of the utility model.
Claims (4)
1. a DEH two-way direct current redundant power supply apparatus, it is characterized in that: comprise DC power supply and DC-AC conversion device, the positive and negative polarities of described DC power supply connect load by diode D1, D2 respectively, the input of described DC-AC conversion device connects AC power, the output head anode of described DC-AC conversion device connects diode D3, negative pole connects diode D4, the negative electrode of described diode D3 is connected with the negative electrode of diode D1, the anodic bonding of the anode of described diode D4 and diode D2.
2. a kind of DEH two-way direct current redundant power supply apparatus according to claim 1, is characterized in that: the output at described DC-AC conversion device is provided with mains switch.
3. a kind of DEH two-way direct current redundant power supply apparatus according to claim 1, is characterized in that: be provided with power monitoring relay at the output of described DC-AC conversion device.
4. a kind of DEH two-way direct current redundant power supply apparatus according to claim 1, is characterized in that: described DC-AC conversion device is WWL-LDX precision DC current regulator power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420198416.4U CN203827050U (en) | 2014-04-21 | 2014-04-21 | DEH two-way direct-current redundant power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420198416.4U CN203827050U (en) | 2014-04-21 | 2014-04-21 | DEH two-way direct-current redundant power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203827050U true CN203827050U (en) | 2014-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420198416.4U Expired - Lifetime CN203827050U (en) | 2014-04-21 | 2014-04-21 | DEH two-way direct-current redundant power supply device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203827050U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113890391A (en) * | 2021-09-06 | 2022-01-04 | 华能国际电力股份有限公司丹东电厂 | Alternating current-direct current redundant power supply system suitable for industrial control system |
-
2014
- 2014-04-21 CN CN201420198416.4U patent/CN203827050U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113890391A (en) * | 2021-09-06 | 2022-01-04 | 华能国际电力股份有限公司丹东电厂 | Alternating current-direct current redundant power supply system suitable for industrial control system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140910 |
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| CX01 | Expiry of patent term |