CN209948777U - Power supply control system of direct-current power supply - Google Patents
Power supply control system of direct-current power supply Download PDFInfo
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- CN209948777U CN209948777U CN201921268084.1U CN201921268084U CN209948777U CN 209948777 U CN209948777 U CN 209948777U CN 201921268084 U CN201921268084 U CN 201921268084U CN 209948777 U CN209948777 U CN 209948777U
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Abstract
The utility model provides a DC power supply control system, which comprises a DC power supply automatic switching device, a first bridge diode group and a second bridge diode group; the positive electrode of the first input end of the direct-current power supply automatic switching device is connected with the positive electrode of the power supply central direct-current bus I, the negative electrode of the first input end of the direct-current power supply automatic switching device is connected with the negative electrode of the power supply central direct-current bus I, the positive electrode of the second input end of the direct-current power supply automatic switching device is connected with the positive electrode of the power supply central direct-current bus II, and the negative electrode of the second input end of the direct-current power supply automatic switching device is connected with the negative electrode of the power; the positive electrode of the output end of the automatic direct-current power supply switching device is connected with the positive electrode of the second diode in the first bridging diode group, and the positive electrode of the first diode in the first bridging diode group is connected with the positive electrode of the direct-current bus I in the power supply center.
Description
Technical Field
The utility model relates to a direct current power supply technical field especially relates to a direct current power supply control system.
Background
The working principle of the currently commonly used direct current power supply system is two methods:
in the first method, for a general power supply load, two sections of power supply buses in the center of a direct current power supply are connected to each load inlet terminal through a feeder cable with a certain capacity wire diameter after passing through respective isolating switches and a power supply monitoring device. In order to ensure normal power supply when the insulation of an operating bus is reduced or a power supply fails, two sections of power supplies are mutually standby in a bus-coupled switch mode, the requirement on power supply reliability is ensured, and the structure of a power supply system is shown in figure 1;
in the second method, for some loads with very high requirements on power supply reliability, a double-diode bridge connection mode is generally adopted on the respective load inlet sides, a mode of parallel power supply of two paths of direct current power supplies is adopted for supplying power to the loads, and when one path of power supply fails, the other path of direct current power supply normally outputs, so that the power supply of the loads cannot be lost. The structure is shown in figure 2;
in the current common direct current power supply system, each direct current load respectively takes one direct current power supply from two direct current power supply feeder buses in a direct current power supply center to provide the direct current power supply for each load, part of important loads adopt diode loop closing parallel operation, and the problems exist:
1. when the single-path power supply is used for supplying power, if the running power supply fails, the standby power supply cannot be automatically switched on, and the reliability of the power supply is low;
2. two power supplies are connected in parallel, the problem of two-point grounding of a direct current loop caused by loop closing operation of two direct current circuits exists, and the stability of a power supply system is low;
the two factors cause the stability and reliability of the electric control protection power supply to be reduced, and the system cannot be reliably stabilized.
SUMMERY OF THE UTILITY MODEL
For solving present DC power supply's stability problem, the utility model provides a DC power supply control system.
A dc power supply control system, wherein: the direct current power supply automatic switching device comprises a direct current power supply automatic switching device, a first bridge connection diode group and a second bridge connection diode group; the first bridge diode group comprises a first diode and a second diode, and the cathodes of the first diode and the second diode are connected and then connected with the anode of the load feeder line busbar; the second bridge diode group comprises a third diode and a fourth diode, and the anodes of the third diode and the fourth diode are connected and then connected with the cathode of the load feeder line busbar; the positive electrode of the first input end of the direct-current power supply automatic switching device is connected with the positive electrode of the power supply center direct-current bus I, the negative electrode of the first input end of the direct-current power supply automatic switching device is connected with the negative electrode of the power supply center direct-current bus I, the positive electrode of the second input end of the direct-current power supply automatic switching device is connected with the positive electrode of the power supply center direct-current bus II, and the negative electrode of the second input end of the direct-current power supply automatic switching device is connected with the negative electrode of the; the positive electrode of the output end of the automatic direct-current power supply switching device is connected with the positive electrode of a second diode in the first bridging diode group, and the positive electrode of a first diode in the first bridging diode group is connected with the positive electrode of a direct-current bus I in the center of the power supply; the cathode of the output end of the automatic direct-current power supply switching device is connected with the cathode of a fourth diode in the second bridging diode group, and the cathode of a third diode in the second bridging diode group is connected with the cathode of a direct-current bus I in the center of the power supply.
Furthermore, the power supply control system of the direct current power supply also comprises a first power-off alarm device and a second power-off alarm device; the first power-loss alarm device comprises a first relay and a first alarm, the first relay comprises a first relay coil and a first relay normally-open contact, the first end of the first relay coil is connected with the positive pole of a power supply central direct-current bus I, the second end of the first relay coil is connected with the negative pole of the power supply central direct-current bus I, and the first relay normally-open contact of the first relay is connected between the power supply input end of the first alarm and a power supply in series; the second power-off alarm device comprises a second relay and a second alarm, the second relay comprises a second relay coil and a second relay normally-open contact, the first end of the second relay coil is connected with the positive pole of the power center direct-current bus II, the second end of the first relay coil is connected with the negative pole of the power center direct-current bus II, and the second relay normally-open contact of the second relay is connected between the power input end of the second alarm and the power supply in series.
Further, in the power supply control system of the direct current power supply, the model of the direct current power supply automatic switching device is TR 1424-ATS/DC-50A/110V.
The utility model provides a direct current power supply control system, the problem that the reliability that exists when having solved single circuit power supply operation in the conventional direct current power supply system on the access mode of multichannel direct current power supply and the operation switching mode of multichannel power supply is low from the access mode of multichannel direct current power supply, and the problem of two point ground connection that two direct current circuit closed loop operation that bring when the double circuit power supply parallel operation leads to, three routes power supply has been realized in grades, the mode that dynamic and static combination switched, power supply system's absolute safety has been guaranteed, stable and reliable operation, especially adapted to the occasion that the direct current power supply reliability requires high.
Drawings
FIG. 1 is a schematic diagram of a DC power supply system of the prior art;
FIG. 2 is a schematic diagram of another prior art DC power supply system;
fig. 3 is a schematic circuit diagram of a dc power supply control system according to the present invention.
Detailed Description
The utility model provides a direct current power supply control system, as shown in fig. 3, comprising a direct current power supply automatic switching device S, a first bridge diode group and a second bridge diode group; the first bridge diode group comprises a first diode D1 and a second diode D2, and the cathodes of the first diode D1 and the second diode D2 are connected and then connected with the anode P + of the load feeder line busbar; the second bridge diode group comprises a third diode D3 and a fourth diode D4, and the anodes of the third diode D3 and the fourth diode D4 are connected and then connected with the negative electrode P-of the load feeder line busbar; the positive pole S1+ of the first input end of the automatic direct current power supply switching device S is connected with the positive pole A + of the power center direct current bus I, the negative pole S1-of the first input end of the automatic direct current power supply switching device S is connected with the negative pole A-of the power center direct current bus I, the positive pole S2+ of the second input end of the automatic direct current power supply switching device S is connected with the positive pole B + of the power center direct current bus II, and the negative pole S2-of the second input end of the automatic direct current power supply switching device S is connected with the negative pole B-of the power center direct current bus II; the positive pole SO + of the output end of the automatic switching device S of the direct-current power supply is connected with the positive pole of a second diode D2 in the first bridge diode group, and the positive pole of a first diode D1 in the first bridge diode group is connected with the positive pole C + of a direct-current bus I in the center of the power supply; the cathode SO-of the output end of the automatic switching device S of the direct current power supply is connected with the cathode of a fourth diode D4 in the second bridge diode group, and the cathode of a third diode D3 in the second bridge diode group is connected with the cathode C-of the direct current bus I in the power supply center.
The direct current power supply control system also comprises a first power-off alarm device and a second power-off alarm device; the first power-loss alarm device comprises a first relay BJ1 and a first alarm, the first relay BJ1 comprises a first relay coil and a first relay normally-open contact, a first end A of the first relay coil is connected with the anode of a power supply central direct-current bus I, a second end B of the first relay coil is connected with the cathode of the power supply central direct-current bus I, and the first relay normally-open contact of the first relay BJ1 is connected between the power supply input end of the first alarm and a power supply in series; the second loses electric alarm device and includes second relay BJ2, the second alarm, second relay BJ2 includes that second relay coil and second relay normally open the contact, the positive pole of power center direct current bus II is connected to the first end A of second relay coil, the negative pole of power center direct current bus II is connected to the second end B of first relay coil, the second relay normally open contact series connection of second relay BJ2 is between second alarm power input and power supply.
The model of the direct current power automatic switching device is TR 1424-ATS/DC-50A/110V.
The utility model discloses technical scheme has following characteristics:
the technical scheme can automatically select two paths of input power supplies from two sections of different direct-current power supply buses respectively according to the state of the input power supplies, and output the selected normal path of input power supply after switching; the technical scheme has the functions of detecting the power quality of the two paths of input power supplies, automatically switching without interruption, manually selecting output setting, switching the power supply state, alarming device faults and the like, so that the reliability of the output of the two paths of direct current power supplies is ensured.
Secondly, according to the technical scheme, the output power supply of the automatic direct-current power supply switching device and a third power supply which is independently taken from the same bus of the direct-current power supply center are connected in parallel in a diode bridging mode to operate, the output of the automatic direct-current power supply switching device serves as a power supply of the load, the multi-path redundancy of the power supply mode is realized, the isolation of two direct-current power supplies is also realized, and the problem that two points of a direct-current system are grounded due to the closed-loop operation of the two direct-current power supplies on the load side is.
Thirdly, the system schematic diagram of the present invention is shown in fig. 3:
positive and negative side feeder lines A +/A-, B +/B-of two paths of direct current power supplies A and B respectively taken from two sections of power center direct current buses I and II are connected to positive and negative input terminals S1 +/S1-and S2 +/S2-of two power supply input ends of a direct current power supply automatic switching device S according to polarities;
according to the quality requirements of loads on the power supply, parameters of the automatic direct-current power supply switching device S are completely set, wherein the parameters comprise power supply switching time, a priority output port, an automatic switching sequence, an alarm output mode and the like;
respectively connecting positive and negative feed lines SO +/SO-of an output power supply of the automatic direct-current power supply switching device S to a forward terminal of a diode D2 of a first bridging diode group (high-power diode unidirectional rectifying circuit) and a reverse terminal of a diode D4 of a second bridging diode group;
connecting a positive feeder line and a negative feeder line of a third direct-current power supply C from a section I of a power supply center rectifying bus into a forward end of a first diode D1 in a first bridge diode group/a reverse end of a third diode D3 in a second bridge diode group according to polarity;
the negative polarity side connected with the D1 and the D2 in the first bridge diode group is used as the positive output end of the final output power supply of the power supply control system in the technical scheme, and the positive polarity sides of the D3 and the D4 in the second bridge diode group are communicated to be used as the negative output end of the final output power supply of the power supply control system in the technical scheme, and power is supplied to each load through the load small busbar + and the load small busbar respectively.
That is, the first layer protects: the automatic switching device S of the direct current power supply obtains a normal section of two sections of direct current buses I and II of the power supply center and outputs the normal section through the output end of the normal section; and (4) second-layer protection: in case of the fault of the automatic switching device S of the direct-current power supply, the power supply center direct-current bus I can also supply power for a load feeder line bus P +/P-; compared with the prior art, the two-layer design is safer and more stable;
fourthly: a set of relay coil of the power failure alarm device is respectively arranged between the positive power line and the negative power line of the two input ends of the diode groups D1/D2 and D3/D4, once the fault of the automatic direct-current power supply switching device S is not output or the direct-current bus I of the power supply center is not output, the corresponding normally open contact of the relay is immediately closed, the corresponding alarm is powered on to alarm, and the reliability of the system is improved.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. A direct current power supply control system is characterized in that: the direct current power supply automatic switching device comprises a direct current power supply automatic switching device, a first bridge connection diode group and a second bridge connection diode group; the first bridge diode group comprises a first diode D1 and a second diode D2, and the cathodes of the first diode D1 and the second diode D2 are connected and then connected with the anode of the load feeder bus bar; the second bridge diode group comprises a third diode D3 and a fourth diode D4, and the anodes of the third diode D3 and the fourth diode D4 are connected and then connected with the cathode of the load feeder busbar; the positive pole S1+ of the first input end of the automatic direct current power supply switching device S is connected with the positive pole A + of the power center direct current bus I, the negative pole S1-of the first input end of the automatic direct current power supply switching device S is connected with the negative pole A-of the power center direct current bus I, the positive pole S2+ of the second input end of the automatic direct current power supply switching device S is connected with the positive pole B + of the power center direct current bus II, and the negative pole S2-of the second input end of the automatic direct current power supply switching device S is connected with the negative pole B-of the power center direct current bus II; the positive pole SO + of the output end of the automatic switching device S of the direct-current power supply is connected with the positive pole of a second diode in the first bridging diode group, and the positive pole of a first diode in the first bridging diode group is connected with the positive pole C + of a direct-current bus I in the center of the power supply; the cathode SO-of the output end of the automatic switching device S of the direct current power supply is connected with the cathode of the fourth diode in the second bridge diode group, and the cathode of the third diode in the second bridge diode group is connected with the cathode C-of the direct current bus I in the center of the power supply.
2. The dc power supply control system of claim 1, wherein: the power failure alarm device also comprises a first power failure alarm device and a second power failure alarm device; the first power-loss alarm device comprises a first relay BJ1 and a first alarm, the first relay BJ1 comprises a first relay coil and a first relay normally-open contact, a first end A of the first relay coil is connected with the anode of a power supply central direct-current bus I, a second end B of the first relay coil is connected with the cathode of the power supply central direct-current bus I, and the first relay normally-open contact of the first relay BJ1 is connected between the power supply input end of the first alarm and a power supply in series; the second loses electric alarm device and includes second relay BJ2, the second alarm, second relay BJ2 includes that second relay coil and second relay normally open the contact, the positive pole of power center direct current bus II is connected to the first end A of second relay coil, the negative pole of power center direct current bus II is connected to the second end B of first relay coil, the second relay normally open contact series connection of second relay BJ2 is between second alarm power input and power supply.
3. The dc power supply control system according to claim 1 or 2, wherein: the model of the direct current power automatic switching device is TR 1424-ATS/DC-50A/110V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921268084.1U CN209948777U (en) | 2019-08-07 | 2019-08-07 | Power supply control system of direct-current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921268084.1U CN209948777U (en) | 2019-08-07 | 2019-08-07 | Power supply control system of direct-current power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209948777U true CN209948777U (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921268084.1U Active CN209948777U (en) | 2019-08-07 | 2019-08-07 | Power supply control system of direct-current power supply |
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| Country | Link |
|---|---|
| CN (1) | CN209948777U (en) |
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2019
- 2019-08-07 CN CN201921268084.1U patent/CN209948777U/en active Active
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Address after: 450000 No. 1 Guodian Avenue, Chengguanxiang, Xingyang City, Zhengzhou City, Henan Province Patentee after: Guoneng Xingyang Thermal Power Co.,Ltd. Address before: 450000 No. 1 Guodian Avenue, Chengguanxiang, Xingyang City, Zhengzhou City, Henan Province Patentee before: STATE POWER XINGYANG COAL ELECTRICITY INTEGRATION Co.,Ltd. |