CN217055315U - Double-machine regenerative generator connecting system based on double-fed generator/motor - Google Patents
Double-machine regenerative generator connecting system based on double-fed generator/motor Download PDFInfo
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- CN217055315U CN217055315U CN202221104831.XU CN202221104831U CN217055315U CN 217055315 U CN217055315 U CN 217055315U CN 202221104831 U CN202221104831 U CN 202221104831U CN 217055315 U CN217055315 U CN 217055315U
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Abstract
The utility model discloses a duplex backheating generator connection system based on double-fed electricity generation/motor, the utility model discloses a BEST steam turbine connection water-feeding pump and double-fed motor, double-fed motor connection transformer, transformer junction house use 10KV generating line, BEST steam turbine drag the frequency conversion water-feeding pump, provide power for the water-feeding pump, and the surplus electric quantity directly inserts double-fed electricity generation/motor electricity generation, and double-fed electricity generation/motor is the generator mode this moment; when the BEST steam turbine has insufficient working capacity and cannot drag the water supply pump, the electric quantity can be absorbed from the auxiliary power system, the power is provided for the water supply pump through the transformer and the double-fed generator/motor, and the double-fed generator/motor is in a motor mode at the moment. The utility model discloses a to the rational utilization of BSET xiao ji acting and electricity generation, improve water-feeding pump operation security and stability, replace the station service power consumption, increase the online electric quantity.
Description
Technical Field
The utility model belongs to the thermal power field, concretely relates to duplex backheat generator connected system based on double-fed electricity generation/motor.
Background
Along with the continuous improvement of design parameters of a Steam Turbine set and the successful operation of a secondary reheating set, the original single-shaft arrangement and simple multi-stage reheating system mode is not more and more suitable for the development of the set, the heat exchange and fire loss is continuously increased due to the improvement of heat exchange temperature difference of a reheating heater, the consumption reduction advantages brought by high parameters are partially eliminated, in order to improve the thermodynamic performance of the system, a double-machine reheating system is increasingly adopted in the design, namely, a variable-rotation-speed Back Extraction Steam Turbine (Back Extraction Steam Turbine, for short, a BEST machine) is additionally added besides the original Steam Turbine, the BEST machine provides a Steam Extraction source for part of the reheating heater, a small-capacity generator is generally added behind the BEST machine in the double-machine reheating system, the generated power is often used for providing power for a water supply pump, and the rest of the double-shaft reheating system is connected to a plant electric system.
The generator of the general steam turbine set is provided with a high-voltage plant transformer, the terminal voltage of the generator is reduced to 10KV and is sent to a 10KV bus, and the power supply of the high-voltage motor is from the 10KV high-voltage bus. Then the voltage is changed from 10KV bus to 'low voltage station change' to 400V (380V) to be supplied to low voltage motor and other station equipment.
Disclosure of Invention
An object of the utility model is to overcome above-mentioned not enough, provide a duplex backheat generator connected system based on double-fed electricity generation/motor, can improve little generator power utilization ability to simplify little generator wiring system.
In order to achieve the purpose, the utility model comprises a BEST steam turbine which is connected with a water feeding pump and a double-fed motor, the double-fed motor is connected with a transformer, and the transformer is connected with a factory 10KV bus;
when the BEST steam turbine can drag the feed pump, the double-fed motor supplies power to the transformer; otherwise, the doubly-fed machine supplies power to the BEST turbine.
And a regulating valve is arranged on a steam inlet pipeline of the BEST steam turbine.
The steam inlet pipeline of the BEST steam turbine is connected with a high-pressure cylinder, the high-pressure cylinder is connected with a boiler, the high-pressure cylinder is connected with a low-pressure cylinder, and the low-pressure cylinder is connected with a generator.
The boiler is connected with feed water.
The low-pressure cylinder is connected with a condenser.
The BEST turbine is connected with the regenerative heater.
BEST steam turbine variable speed operation.
The working frequency of the doubly-fed machine is 50 Hz.
Compared with the prior art, the utility model adopts the BEST steam turbine to connect the water feeding pump and the double-fed motor, the double-fed motor is connected with the transformer, the transformer is connected with the factory 10KV bus, the BEST steam turbine drags the variable frequency water feeding pump to provide power for the water feeding pump, the residual electric quantity is directly accessed into the double-fed power generation/motor to generate power, and the double-fed power generation/motor is in a generator mode at the moment; when the BEST steam turbine has insufficient working capacity and cannot drag the water feeding pump, the power can be absorbed from the auxiliary power system, the power is provided for the water feeding pump through the transformer and the double-fed generator/motor, and the double-fed generator/motor is in a motor mode at the moment. The utility model discloses a to the rational utilization of BSET xiao ji acting and electricity generation, improve water-feeding pump operation security and stability, replace the station service power consumption, increase the online electric quantity.
Further, the utility model discloses be provided with the governing valve on well BEST steam turbine's the admission line, can adjust the admission volume that gets into the BEST machine to adjust the acting capacity of BEST machine.
Drawings
FIG. 1 is a system diagram of the present invention;
the system comprises a BEST steam turbine 1, a BEST steam turbine 2, a double-fed motor 3, a transformer 4, a water feeding pump 5, a regulating valve 6, a boiler 7, a high-pressure cylinder 8, an intermediate-pressure cylinder 9, a low-pressure cylinder 10 and a generator.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, the utility model comprises a BEST steam turbine 1, wherein the BEST steam turbine 1 is connected with a water feeding pump 4 and a double-fed motor 2, the double-fed motor 2 is connected with a transformer 3, and the transformer 3 is connected with a plant 10KV bus; the inlet pipeline of the BEST steam turbine 1 is provided with a regulating valve 5. The steam inlet pipeline of the BEST steam turbine 1 is connected with a high-pressure cylinder 7, the high-pressure cylinder 7 is connected with a boiler 6, the high-pressure cylinder 7 is connected with an intermediate-pressure cylinder 8, the intermediate-pressure cylinder 8 is connected with a low-pressure cylinder 9, and the low-pressure cylinder 9 is connected with a generator 10. The boiler 6 is connected to feed water. The low pressure cylinder 9 is connected with a condenser. The BEST turbine 1 is connected with a regenerative heater.
When the BEST steam turbine 1 can drag the feed pump 4, the double-fed motor 2 supplies power to the transformer 3; otherwise, the doubly fed machine 2 supplies power to the BEST turbine 1.
Preferably, the BEST turbine 1 operates at variable speeds. The working frequency is 50Hz after being adjusted by the double-fed motor 2.
The BEST steam turbine of the utility model adopts variable-speed operation and drags the variable-frequency water-feeding pump to provide power for the water-feeding pump, the residual electric quantity is directly connected into the double-fed generator/motor to generate electricity, and the double-fed generator/motor is in a generator mode at the moment; when the BEST machine has insufficient working capacity and cannot drag the water supply pump, the BEST machine can also absorb electric quantity from the auxiliary power system, power is provided for the water supply pump through the transformer and the double-fed generator/motor, and the double-fed generator/motor is in a motor mode at the moment.
The BEST steam turbine 1 is connected to a station service power system to replace part of station service power and increase the on-line electricity quantity. The utility model discloses solve the problem that BEST machine electricity generation is surplus and the electricity generation is not enough in step. Through mode switching of the doubly-fed generator/motor, the BEST small machine can supply power to the auxiliary power system and can absorb power from the auxiliary power system.
Claims (8)
1. A double-machine regenerative generator connecting system based on a double-fed power generation/motor is characterized by comprising a BEST steam turbine (1), wherein the BEST steam turbine (1) is connected with a water feeding pump (4) and a double-fed motor (2), the double-fed motor (2) is connected with a transformer (3), and the transformer (3) is connected with a plant 10KV bus;
when the BEST steam turbine (1) can drag the feed pump (4), the double-fed motor (2) supplies power to the transformer (3); otherwise, the doubly-fed machine (2) supplies power to the BEST turbine (1).
2. The doubly-fed generator/motor-based regenerative generator connection system as claimed in claim 1, characterized in that a regulating valve (5) is arranged on a steam inlet pipeline of the BEST steam turbine (1).
3. A double-fed power generation/motor-based double-machine regenerative generator connection system as claimed in claim 1, characterized in that the steam inlet pipeline of BEST steam turbine (1) is connected with high pressure cylinder (7), high pressure cylinder (7) is connected with boiler (6), high pressure cylinder (7) is connected with intermediate pressure cylinder (8), intermediate pressure cylinder (8) is connected with low pressure cylinder (9), low pressure cylinder (9) is connected with generator (10).
4. The double-fed generator/motor-based double regenerative generator connection system according to claim 3, characterized in that the boiler (6) is connected to feed water.
5. The double-machine regenerative generator connection system based on the doubly-fed generator/motor as claimed in claim 3, characterized in that the low-pressure cylinder (9) is connected with a condenser.
6. The doubly-fed generator/motor based double regenerative generator connection system according to claim 1, characterized in that the BEST turbine (1) is connected to a regenerative heater.
7. A doubly-fed generator/motor based double regenerative generator connection system according to claim 1, characterized in that the BEST turbine (1) operates with variable rotational speed.
8. A double fed generator/motor based regenerative generator connection system according to claim 1, characterized by the fact that the double fed machine (2) is capable of converting the input current operating frequency to 50 Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221104831.XU CN217055315U (en) | 2022-05-06 | 2022-05-06 | Double-machine regenerative generator connecting system based on double-fed generator/motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221104831.XU CN217055315U (en) | 2022-05-06 | 2022-05-06 | Double-machine regenerative generator connecting system based on double-fed generator/motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217055315U true CN217055315U (en) | 2022-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221104831.XU Active CN217055315U (en) | 2022-05-06 | 2022-05-06 | Double-machine regenerative generator connecting system based on double-fed generator/motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217055315U (en) |
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2022
- 2022-05-06 CN CN202221104831.XU patent/CN217055315U/en active Active
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