CN219592164U - Control system for grid connection and disconnection of diesel generating set and commercial power - Google Patents
Control system for grid connection and disconnection of diesel generating set and commercial power Download PDFInfo
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- CN219592164U CN219592164U CN202321207210.9U CN202321207210U CN219592164U CN 219592164 U CN219592164 U CN 219592164U CN 202321207210 U CN202321207210 U CN 202321207210U CN 219592164 U CN219592164 U CN 219592164U
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- diesel generator
- circuit breaker
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Abstract
The utility model discloses a control system for grid connection and disconnection of a diesel generator set and commercial power, which comprises the diesel generator set, a main transformer, a first circuit breaker, a second circuit breaker, a first voltage transformer, a second voltage transformer, a grid connection module and a synchronization module; the input end of the main transformer is connected with the mains supply, the first circuit breaker is arranged between the output end of the main transformer and the bus, and the second circuit breaker is arranged between the diesel generator set and the bus; the first voltage transformer is connected with the output end of the main transformer, and the second voltage transformer is connected with the bus; the grid-connected module and the contemporaneous module are respectively provided with a control end and a detection end; the control end of the grid-connected module is respectively connected with the diesel generator set and the second circuit breaker, and the detection end of the grid-connected module is respectively connected with the first voltage transformer and the first circuit breaker; the control end of the synchronization module is connected with the first circuit breaker, and the detection end of the synchronization module is connected with the first voltage transformer and the second voltage transformer respectively.
Description
Technical Field
The utility model relates to the technical field of factory power supply, in particular to a control system for grid connection and disconnection of a diesel generating set and commercial power.
Background
At present, a plurality of enterprises with high electricity requirements, especially in industries such as glass, metallurgy, hospitals and the like, all have own standby diesel generator sets. When the commercial power fails, the diesel generator set is used as an emergency power supply. When the mains supply is in, the load needs to be switched from the power supply of the diesel generator set to the power supply of the mains supply.
In the current general power supply scheme, after the mains supply fails, a breaker corresponding to the mains supply is in voltage-losing tripping, a diesel generator set is started, and the breaker corresponding to the diesel generator set is closed, so that the diesel generator set is connected with a bus to supply power for a load. In the whole process, the whole plant must stop electricity once, and the power failure has sudden property, and the diesel generator set needs time to start, so the power failure process is difficult to avoid. However, after the mains supply is powered on, the diesel generator set must be disconnected first, the circuit breaker corresponding to the diesel generator set is disconnected, and then the circuit breaker corresponding to the mains supply is closed, and in the switching process, the whole plant stops once again, so that great loss is generated to production.
Disclosure of Invention
In order to solve the problems in the background art, the utility model adopts the following technical scheme:
a control system for grid connection and disconnection of a diesel generator set and commercial power comprises the diesel generator set, a main transformer, a first circuit breaker, a second circuit breaker, a first voltage transformer, a second voltage transformer, a grid connection module and a synchronization module;
the input end of the main transformer is connected with the mains supply, the first circuit breaker is arranged between the output end of the main transformer and the bus, and the second circuit breaker is arranged between the diesel generator set and the bus;
the first voltage transformer is connected with the output end of the main transformer, and the second voltage transformer is connected with the bus;
the grid-connected module and the contemporaneous module are respectively provided with a control end and a detection end;
the control end of the grid-connected module is respectively connected with the diesel generator set and the second circuit breaker, and the detection end of the grid-connected module is respectively connected with the first voltage transformer and the first circuit breaker;
the control end of the synchronization module is connected with the first circuit breaker, and the detection end of the synchronization module is connected with the first voltage transformer and the second voltage transformer respectively.
In some embodiments, the grid tie module employs an AGC150 controller.
In some embodiments, the synchronization module employs NSR-3652 synchronization means.
In some embodiments, the first voltage transformer is a three-phase voltage transformer.
In some embodiments, the diesel-electric set is a 10kV diesel-electric set, and the bus corresponds to a 10kV loaded bus.
Compared with the prior art, the utility model has the beneficial effects that:
when the control system for grid connection and disconnection of the diesel generator set and the commercial power is applied to a factory power supply system, the load can be switched from the power supply of the diesel generator set to the power supply of the commercial power without disturbance by adding corresponding equipment on the basis of the original control unit, so that the influence of power failure on production is reduced; the device has the advantages of simple structure, simple and reliable control and low cost.
Drawings
Fig. 1 is a schematic circuit diagram of a control system for grid connection and disconnection of a diesel generator set and commercial power.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present utility model easy to understand, the following further describes how the present utility model is implemented with reference to the accompanying drawings and the detailed description.
Referring to fig. 1, the utility model provides a control system for grid connection and disconnection of a diesel generator set and commercial power, which comprises a diesel generator set G, a main transformer T, a first circuit breaker DL1, a second circuit breaker DL2, a first voltage transformer PT1, a second voltage transformer PT2, a grid connection module 1 and a synchronization module 2; the input end of the main transformer T is connected with the mains supply, the first circuit breaker DL1 is arranged between the output end of the main transformer T and the bus L, and the second circuit breaker DL2 is arranged between the diesel generator set G and the bus L; the first voltage transformer PT1 is connected with the output end of the main transformer T, and the second voltage transformer PT2 is connected with the bus L; the grid-connected module 1 and the contemporaneous module 2 are respectively provided with a control end and a detection end; the control end of the grid-connected module 1 is respectively connected with the diesel generator set G and the second circuit breaker DL2, and the detection end is respectively connected with the first voltage transformer PT1 and the first circuit breaker DL1; the control end of the synchronization module 2 is connected with the first circuit breaker DL1, and the detection end is respectively connected with the first voltage transformer PT1 and the second voltage transformer PT2.
Although in the illustrated embodiment, the diesel-electric generator set G depicts only one diesel-electric generator, it is understood that the number of diesel-electric generators may be more than one, and may be connected in parallel by a plurality of diesel-electric generators, and jointly connected to the bus L, where the control end of the grid-connected module 1 is connected to each diesel-electric generator in the diesel-electric generator set G.
In one embodiment, the grid-tie module 1 employs an AGC150 controller; the synchronization module 2 adopts an NSR-3652 synchronization device; the first voltage transformer PT1 is a three-phase voltage transformer; the diesel generator set G is a 10kV diesel generator set G, and the bus L corresponds to a 10kV load bus L.
It can be understood that in some existing diesel generator set control systems powered by factories, the diesel generator set G, the main transformer T, the first circuit breaker DL1 and the second circuit breaker DL2 are included, but when the diesel generator set G is powered, after the mains supply is turned on, a worker needs to manually operate, firstly, the diesel generator set G is disconnected, the second circuit breaker DL2 corresponding to the diesel generator set G is disconnected, and then the first circuit breaker DL1 corresponding to the mains supply is closed, so that the operation is complex and troublesome, and in the switching process, the whole factory is stopped once again, and great loss is generated to the production.
On the basis of the existing diesel generator set control system, the equipment such as the grid-connected module 1, the synchronization module 2 and the like is added on the side of the diesel generator set, the main body of the grid-connected module 1 is positioned on the side of the diesel generator set G and used for automatically controlling the work of the diesel generator set G, and the main body of the synchronization module 2 is positioned on the side of the commercial power and used for controlling the synchronization closing of the first circuit breaker DL 1.
Specifically, the utility model provides a control system for grid connection and disconnection of a diesel generator set and commercial power, which has the following working principle:
after the mains supply fails, when the diesel generating set G runs in a isolated network, the first breaker DL1 is opened, the second breaker DL2 is closed, and the diesel generating set G is connected with a bus, so that power is supplied to a load.
When the mains supply is powered on, the grid-connected module 1 detects a voltage signal of the mains supply after passing through the main transformer T through the first voltage transformer PT1, and then the output voltage and frequency of the diesel generator set G are automatically adjusted to be synchronous with the detected voltage signal. Meanwhile, the synchronous module 2 also detects a voltage signal through the first voltage transformer PT1, and also detects the voltage signal of the bus through the second voltage transformer PT2 on the bus L, and when the voltage and frequency synchronization of the two signals are detected, the synchronous switching-on of the first circuit breaker DL1 is automatically controlled, so that the bus L is switched on with the mains supply. And after detecting a signal that the first breaker DL1 is successfully switched on, the grid-connected module 1 immediately controls the second breaker DL2 at the outlet of the diesel generator set G to be automatically switched off, and then controls the diesel generator set G to be stopped. At this point, the load has been switched from being supplied by the diesel-electric set G to being supplied by the mains supply without disturbance.
In summary, when the control system for grid connection and disconnection of the diesel generator set and the commercial power is applied to a factory power supply system, the load can be switched from the power supply of the diesel generator set to the power supply of the commercial power without disturbance by adding corresponding equipment on the basis of the original control unit, so that the influence of power failure on production is reduced; the device has the advantages of simple structure, simple and reliable control and low cost.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.
Claims (5)
1. The control system for grid connection and disconnection of the diesel generator set and the commercial power is characterized by comprising the diesel generator set, a main transformer, a first circuit breaker, a second circuit breaker, a first voltage transformer, a second voltage transformer, a grid connection module and a synchronization module;
the input end of the main transformer is connected with the mains supply, the first circuit breaker is arranged between the output end of the main transformer and the bus, and the second circuit breaker is arranged between the diesel generator set and the bus;
the first voltage transformer is connected with the output end of the main transformer, and the second voltage transformer is connected with the bus;
the grid-connected module and the contemporaneous module are respectively provided with a control end and a detection end;
the control end of the grid-connected module is respectively connected with the diesel generator set and the second circuit breaker, and the detection end of the grid-connected module is respectively connected with the first voltage transformer and the first circuit breaker;
the control end of the synchronization module is connected with the first circuit breaker, and the detection end of the synchronization module is connected with the first voltage transformer and the second voltage transformer respectively.
2. The control system for grid connection and disconnection of a diesel generator set and a commercial power according to claim 1, wherein the grid connection module adopts an AGC150 controller.
3. The control system for grid-tie and disconnection of a diesel generator set from utility power according to claim 1, wherein the synchronization module employs NSR-3652 synchronization means.
4. The control system for grid-connection and disconnection of a diesel generator set and a commercial power according to claim 1, wherein the first voltage transformer is a three-phase voltage transformer.
5. The control system for grid connection and disconnection of a diesel generator set and a commercial power according to claim 1, wherein the diesel generator set is a 10kV diesel generator set, and the bus corresponds to a 10kV loaded bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321207210.9U CN219592164U (en) | 2023-05-18 | 2023-05-18 | Control system for grid connection and disconnection of diesel generating set and commercial power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321207210.9U CN219592164U (en) | 2023-05-18 | 2023-05-18 | Control system for grid connection and disconnection of diesel generating set and commercial power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219592164U true CN219592164U (en) | 2023-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321207210.9U Active CN219592164U (en) | 2023-05-18 | 2023-05-18 | Control system for grid connection and disconnection of diesel generating set and commercial power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219592164U (en) |
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2023
- 2023-05-18 CN CN202321207210.9U patent/CN219592164U/en active Active
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