CN212969154U - Small power supply system for diesel generating set - Google Patents
Small power supply system for diesel generating set Download PDFInfo
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- CN212969154U CN212969154U CN202021510475.2U CN202021510475U CN212969154U CN 212969154 U CN212969154 U CN 212969154U CN 202021510475 U CN202021510475 U CN 202021510475U CN 212969154 U CN212969154 U CN 212969154U
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Abstract
The utility model relates to a little electrical power generating system for diesel generating set. A small power supply system for a diesel generating set comprises a direct-current power supply, a battery pack and a rectifier bridge; the rectifier bridge comprises a direct current diode and a battery diode which are connected in parallel; the output anode of the direct current power supply is connected with the anode of the direct current diode, and the output cathode of the direct current power supply is connected with the diesel generator set; the anode of the battery pack is connected with the anode of the battery diode, and the output cathode of the battery pack is connected with the diesel generator set; the output end of the rectifier bridge is connected with the diesel generator set; and the input end of the direct current power supply is connected with the grid-connected power grid of the diesel generating set. The utility model discloses use the group battery power supply starts the electric wire netting into after first diesel generating set operation, DC power supply follows the electric wire netting is got the electricity, the zero clearance replacement the battery group is right the diesel generating set power supply.
Description
Technical Field
The utility model relates to a diesel generator field especially relates to a little electrical power generating system for diesel generating set.
Background
In the production process of an oil drilling machine, a well team is required to be moved frequently, when the oil drilling machine is moved to a new drilling site, a diesel generator set needs to be started to provide power for the site, and the next work can be started, otherwise, all the works cannot be mentioned. The diesel generator set can be started only when the control panel has running conditions after the diesel generator set is self-checked by the control panel, and any one set can be started due to environmental restrictions. Meanwhile, considering the influence of the charging times of the battery on the service life of the battery, the charging times are expected to be as small as possible, once the diesel generating set is started and runs on the internet, the power supply of the battery is cut off immediately and is converted into the power supply of a switching power supply, so that the battery is in a maintenance state. In addition, it is noted that when the last unit is quitted, a battery is needed to supply power to the control panel, so that the unit is shut down after being cooled down and operated for 1 to two hours.
At present, a UPS technical scheme generally adopted needs to be provided with certain detection equipment, firstly, the battery pack can be put into operation after the power failure of a power grid is judged, and a certain hysteresis phenomenon exists. And for an electric control system of the diesel generating set, the result caused by instant power loss is fatal.
Therefore, the existing small power supply system of the diesel generating set has the following defects: 1. the 24VDC battery pack cannot simultaneously supply power for 4-5 diesel generating sets; 2. after any diesel generator set is powered on the internet, a 24VDC battery pack power supply loop cannot be cut off immediately, and a switching power supply is switched to supply power to a distribution board of the diesel generator set; 3. when the diesel generating set quits the power grid, the switch power supply loses power, the battery cannot supply power continuously immediately, and improvement are needed.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing deficiencies of the prior art, an object of the present invention is to provide a small power system for a diesel generator set, which can realize the gapless replacement of a switch power supply battery pack to supply power to the diesel generator set.
In order to achieve the purpose, the utility model adopts the following technical proposal:
a small power supply system for a diesel generating set comprises a direct-current power supply, a battery pack and a rectifier bridge; the rectifier bridge comprises a direct current diode and a battery diode which are connected in parallel;
the output anode of the direct current power supply is connected with the anode of the direct current diode, and the output cathode of the direct current power supply is connected with the diesel generator set; the anode of the battery pack is connected with the anode of the battery diode, and the output cathode of the battery pack is connected with the diesel generator set; the output end of the rectifier bridge is connected with the diesel generator set; and the input end of the direct current power supply is connected with the grid-connected power grid of the diesel generating set.
Preferably, the battery pack is a rechargeable battery.
The small power supply system for the diesel generating set preferably further comprises a charging circuit; the charging circuit comprises a transformer and a charging power supply which are connected in series; the input end of the transformer is connected with the grid-connected power grid of the diesel generating set; and the output end of the charging power supply is connected to two ends of the battery pack.
Preferably, the small power system for the diesel generating set further comprises a charging fuse which is arranged between the transformer and a grid-connected power grid of the diesel generating set.
Preferably, the small power supply system for the diesel generating set further comprises a small power switch which is arranged between the battery pack and the rectifier bridge.
Preferably, the small power system for the diesel generating set further comprises a direct current fuse which is arranged between the direct current power supply and a grid-connected power grid of the diesel generating set.
Preferably, the number of the direct-current power supplies and the number of the rectifier bridges are the same as the number of the diesel generator sets.
Preferably, the output voltage of the small power supply system for the diesel generating set is 24V-26V.
Compared with the prior art, the utility model provides a pair of a little electrical power generating system for diesel generating set has following beneficial effect:
1) the battery pack is used for supplying power, a first diesel generating set is started to enter a power grid after running, the direct-current power supply takes power from the power grid, and the battery pack is replaced without clearance to supply power to the diesel generating set;
2) and when the last diesel generator set exits the power grid, the battery pack replaces the direct-current power supply to supply power to the diesel generator set without clearance, and the cooling equipment on the diesel generator set is ensured to cool the diesel generator set.
Drawings
Fig. 1 is a circuit diagram of a small power supply system provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1, the present invention provides a small power system for a diesel generator set, which includes a dc power source PS01-PS04, a battery pack BATT1-BATT2, and a rectifier bridge BR02-BR 05; the rectifier bridge BR02-BR05 comprises a direct current diode and a battery diode which are connected in parallel;
the output positive electrode of the direct-current power supply PS01-PS04 is connected with the positive electrode of the direct-current diode, and the output negative electrode of the direct-current power supply PS01-PS04 is connected with a diesel generator set; the anodes of the BATT1-BATT2 are connected with the anodes of the battery diodes, and the output cathodes of the batteries are connected with the diesel generator set; the output end of the rectifier bridge BR02-BR05 is connected with the diesel generator set; the input end of the direct-current power supply PS01-PS04 is connected with the grid-connected power grid of the diesel generator set.
Specifically, through research on the on and off characteristics of the diode, the switching speed time of the diode is in the microsecond level and is close to zero second. Therefore, the utility model provides a little electrical power generating system uses rectifier bridge BR02-BR05 as the transfer device, realizes the seamless conversion power supply between battery BATT1-BATT2 and DC power supply PS01-PS 04. It should be noted that, in general, 4-5 groups of diesel generator sets are used for power generation and grid connection, and accordingly, the number of the direct-current power supplies PS01-PS04 and the number of the rectifier bridges BR02-BR05 are the same as the number of the diesel generator sets, the number of the battery packs BATT1-BATT2 is 1, and a single battery pack BATT1-BATT2 is used for providing power for multiple groups of the diesel generator sets.
Referring to fig. 1, the operation principle of the battery pack BATT1-BATT2 power supply loop in the small power supply system is as follows: the output positive end of the BATT1-BATT2 is connected with the AC2 terminal on the rectifier bridge BR02-BR05 corresponding to each generator set, the diesel generator set is powered through the battery diode, and the output negative end of the battery pack is connected with the diesel generator set to partially power a low-voltage device of the diesel generator set. The operation principle of the power supply loop of the direct-current power supply PS01-PS04 is as follows: the input terminal of the direct-current power supply PS01-PS04 is connected with a power grid to obtain electricity, the direct-current power supply PS01-PS04 preferably outputs the same voltage as that of the battery pack BATT1-BATT2, the positive output terminal of the direct-current power supply PS01-PS04 is connected with the AC1 terminal of the rectifier bridge BR02-BR05 and supplies power to the diesel generator set through the direct-current diode, and the negative output terminal of the direct-current power supply PS01-PS04 is connected with the diesel generator set and supplies power to a low-voltage device part of the diesel generator set. The operation principle of the automatic switching loop by using the rectifier bridge BR02-BR05 is as follows: firstly, the battery pack BATT1-BATT2 supplies direct current with first preset voltage (preferably 24VDC) to the diesel generator set, after the diesel generator set is started, the direct current power supply PS01-PS04 is powered through a grid-connected power grid, the output voltage is adjusted to second preset voltage (preferably 26VDC, not limited to 26VDC, and only higher than the voltage at two ends of the battery pack BATT1-BATT 2), and the direct current output power supply can realize seamless work of replacing the battery pack BATT1-BATT 2.
Preferably, in this embodiment, the battery packs BATT1-BATT2 are rechargeable batteries, preferably storage batteries.
As a preferable scheme, in this embodiment, the charging device further includes a charging circuit; the charging circuit comprises a transformer T3 and a charging power supply PS13 which are connected in series; the input end of the transformer T3 is connected with the grid-connected power grid of the diesel generating set; the output end of the charging power supply PS13 is connected to two ends of the battery pack BATT1-BATT 2. Specifically, both the dc power supply PS01-PS04 and the charging power supply PS13 are switching power supplies commonly used in the art, that is, an external dc supply device capable of converting ac power with a certain voltage into dc power with a predetermined voltage can be implemented, and specific signal parameters are not limited.
Specifically, a power supply from a power grid charges the battery packs BATT1-BATT2 through the transformer T3 and the charging power supply PS13, so that the battery packs BATT1-BATT2 are guaranteed to work in an optimal electric quantity state; the transformer T3 carries out high-order oblique wave purification on an input power supply, and then the input power supply is input to the input end of the charging power supply PS13, the charging power supply PS13 outputs 24VDC (adjustable range 20VDC-28VDC) direct-current voltage, and the output is connected to the positive terminal and the negative terminal of the battery pack BATT1-BATT2, so that the battery can be charged normally.
Preferably, in this embodiment, the charging fuse is further included, and is installed between the transformer T3 and the grid-connected grid of the diesel generator set.
Preferably, the battery pack further comprises a small power switch arranged between the battery pack BATT1-BATT2 and the rectifier bridge BR02-BR 05.
In a further embodiment, the operating principle of the small power supply system is as follows:
1. starting first unit and surfing Internet by diesel generator set
After the well team arrives at a new site, the diesel generating set is not started, the grid-connected power grid is not electrified, and the battery pack BATT1-BATT2 has electric power storage; at the moment, the small power switch is closed, direct current of the battery pack BATT1-BATT2 is reduced by 0.7vdc (diode characteristic, not specifically described here) through the battery diode to supply power to the diesel generator set, so that the diesel generator set is ensured to normally start and operate, and power is supplied to a grid-connected power grid;
2. when a drilling crew normally works, a diesel generating set runs on a network, the output voltage of the charging power supply PS13 is set to be the rated voltage of a battery pack BATT1-BATT2, the output voltage of the direct current power supply PS01-PS04 is set to be higher than the set voltage of the charging power supply PS13, and at the moment, direct current output by the direct current power supply PS01-PS04 is reduced by 0.7vdc through the direct current diode to supply power to the diesel generating set; the output voltage of the battery packs BATT1-BATT2 is low, the diodes are cut off, and the battery packs BATT1-BATT2 are in a power storage state;
3. when the well team is evacuated from the field, the last diesel generator set is off-line and off-line, the grid-connected power grid is powered off, the direct-current power supply PS01-PS04 is powered off, the battery pack BATT1-BATT2 stores electricity, the diesel generator set starts to be powered on, and the temperature reduction operation of the motor is guaranteed.
Preferably, the direct-current protection device further comprises a direct-current fuse, and the direct-current fuse is arranged between the direct-current power supply PS01-PS04 and the grid-connected power grid of the diesel generating set.
Preferably, in the embodiment, the number of the direct-current power supplies PS01-PS04 is the same as that of the rectifier bridges BR02-BR05, and the number of the direct-current power supplies is the same as that of the diesel generator sets.
Preferably, in this embodiment, the output voltage of the dc power supply PS01-PS04 is 24V-26V.
It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.
Claims (8)
1. A small power supply system for a diesel generating set is characterized by comprising a direct-current power supply, a battery pack and a rectifier bridge; the rectifier bridge comprises a direct current diode and a battery diode which are connected in parallel;
the output anode of the direct current power supply is connected with the anode of the direct current diode, and the output cathode of the direct current power supply is connected with the diesel generator set; the anode of the battery pack is connected with the anode of the battery diode, and the output cathode of the battery pack is connected with the diesel generator set; the output end of the rectifier bridge is connected with the diesel generator set; and the input end of the direct current power supply is connected with the grid-connected power grid of the diesel generating set.
2. A small power system for a diesel-electric set according to claim 1, characterized in that said battery pack is a rechargeable battery.
3. The small power system for a diesel-electric set according to claim 2, characterized by further comprising a charging circuit; the charging circuit comprises a transformer and a charging power supply which are connected in series; the input end of the transformer is connected with the grid-connected power grid of the diesel generating set; and the output end of the charging power supply is connected to two ends of the battery pack.
4. The small power system for a diesel generator set according to claim 3, further comprising a charging fuse installed between said transformer and said diesel generator set grid-connected grid.
5. The small power system for a diesel generator set as set forth in claim 1, further comprising a small power switch installed between said battery pack and said rectifier bridge.
6. The small power system for a diesel generator set according to claim 1, further comprising a dc fuse installed between the dc power source and the grid-connected grid of the diesel generator set.
7. The small power system for diesel-electric set according to claim 1, characterized in that the number of said direct current power supply and said rectifier bridge is the same, while the number is the same as the number of said diesel-electric set.
8. The small power system for a diesel-electric set according to claim 1, characterized in that the output voltage of said direct current power supply is 24V-26V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021510475.2U CN212969154U (en) | 2020-07-28 | 2020-07-28 | Small power supply system for diesel generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021510475.2U CN212969154U (en) | 2020-07-28 | 2020-07-28 | Small power supply system for diesel generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212969154U true CN212969154U (en) | 2021-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021510475.2U Active CN212969154U (en) | 2020-07-28 | 2020-07-28 | Small power supply system for diesel generating set |
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| Country | Link |
|---|---|
| CN (1) | CN212969154U (en) |
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2020
- 2020-07-28 CN CN202021510475.2U patent/CN212969154U/en active Active
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