CN211321240U - Motor starting power supply device of gas turbine generator set - Google Patents
Motor starting power supply device of gas turbine generator set Download PDFInfo
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- CN211321240U CN211321240U CN201921155530.8U CN201921155530U CN211321240U CN 211321240 U CN211321240 U CN 211321240U CN 201921155530 U CN201921155530 U CN 201921155530U CN 211321240 U CN211321240 U CN 211321240U
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- 230000002457 bidirectional effect Effects 0.000 claims abstract description 22
- 230000003068 static effect Effects 0.000 claims description 13
- 238000012423 maintenance Methods 0.000 claims description 10
- 230000009977 dual effect Effects 0.000 claims description 5
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 4
- 239000013589 supplement Substances 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 238000007599 discharging Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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Abstract
The utility model relates to a motor starting power supply device of a gas turbine generator set, which comprises a UPS uninterrupted power supply module, a battery module, a control module, a frequency converter and a motor; the UPS module comprises an input breaker, a rectifier, a bidirectional converter, an inverter and an output breaker, wherein one end of the input breaker is connected to a mains supply, the other end of the input breaker is connected to the input end of the rectifier, the output end of the rectifier is connected to the bidirectional converter and the inverter, the bidirectional converter is connected to the inverter, and the inverter is connected to the output breaker; the battery module comprises a battery breaker and a battery pack, and the battery pack is connected to the bidirectional converter through the battery breaker; one end of the frequency converter is connected with the output breaker, and the other end of the frequency converter is connected with the motor. The motor is started through the frequency converter, so that the starting current of the motor can be reduced, and meanwhile, the battery pack is charged through the mains supply to supplement the energy of the battery pack.
Description
Technical Field
The utility model relates to a electrical power generating system technical field, in particular to gas turbine generating set's motor start power supply unit.
Background
Gas turbines comprise three main components: the normal operation of the gas turbine is to drive a gear box of the gas turbine through an external auxiliary power system, the gas turbine operates from a static state to reach a certain rotating speed, and the auxiliary power system is disconnected after the gas turbine is accelerated to be capable of operating independently; air and fuel are respectively sent into a combustion chamber after passing through an air compressor, and the fuel and the air are mixed and combusted to release heat energy; the temperature of the gas generated by combustion rises after absorbing heat, and then the gas flows into a gas turbine to do work while expanding, so that the heat energy is converted into mechanical energy; the power device of the gas turbine generator set adopts a gas turbine, the generator of the set adopts a three-phase alternating current synchronous generator, and a cylindrical pin type or elastic coupling is adopted for connection between an output shaft of the gas turbine and an input shaft of the generator, so that the mechanical energy of the gas turbine is converted into the electric energy output by the generator.
The motor starting system of the existing gas turbine generator set needs three-phase alternating current power supply, one is commercial power supply, and the other is UPS uninterrupted power supply provided by a storage battery; in the whole power supply system, when the direct start is carried out, a large impact current (5-7 times of the rated current of a motor) is generated on the power supply system, and the voltage drop of the power supply system is caused by the instant start, so that the damage to the power supply system is quite large. And because the frequent start of the motor can cause the capacity loss of the storage battery of the UPS system to be serious, and finally the gas turbine can not be started.
SUMMERY OF THE UTILITY MODEL
Therefore, a motor starting power supply device of a gas turbine generator set is needed to be provided, and the problems that when the motor is directly started, a large impact current is generated on a power supply system, and the capacity loss of a storage battery is serious due to frequent starting of the motor are solved.
In order to achieve the above object, the inventor provides a motor starting power supply device of a gas turbine generator set, which comprises a UPS uninterruptible power supply module, a battery module, a control module, a frequency converter and a motor;
the UPS module comprises an input breaker, a rectifier, a bidirectional converter, an inverter and an output breaker, wherein one end of the input breaker is connected to a mains supply, the other end of the input breaker is connected to the input end of the rectifier, the output end of the rectifier is connected to the bidirectional converter and the inverter, the bidirectional converter is connected to the inverter, and the inverter is connected to the output breaker;
the battery module comprises a battery breaker and a battery pack, and the battery pack is connected to the bidirectional converter through the battery breaker;
one end of the frequency converter is connected with the output circuit breaker, and the other end of the frequency converter is connected with the motor;
the control module comprises a programmable controller and a control panel, the control panel is connected to the programmable controller, and the programmable controller is connected to the control ends of the input breaker, the output breaker and the battery breaker and the frequency converter.
Further optimize, still include dual-power switch module, dual-power switch module includes commercial power circuit breaker, combustion engine circuit breaker and electrical source controller, commercial power circuit breaker's one end is connected in mains power, and the other end is connected in the input circuit breaker, the one end of combustion engine circuit breaker is connected in combustion engine power, and the other end is connected in the input circuit breaker, electrical source controller connects in the control end and the programmable controller of commercial power circuit breaker and combustion engine circuit breaker.
Preferably, the battery module further includes a BMS battery management unit connected to the battery pack and the display, and a display.
Further optimize, UPS uninterrupted power source module still includes bypass circuit breaker and static switch, the one end of bypass circuit breaker is connected in mains supply, and the other end passes through static switch to be connected in output circuit breaker, the control end of bypass circuit breaker is connected in programmable controller.
Further optimize, the UPS uninterrupted power source module includes the maintenance circuit breaker, the one end of maintenance circuit breaker is connected in mains power supply, and the other end is connected in the converter, the control end of maintenance circuit breaker is connected in programmable controller.
Further preferably, the battery pack is a lithium iron phosphate battery.
Different from the prior art, according to the technical scheme, the motor starting power supply is converted into stable alternating current through a direct current of the battery pack by the inverter, the motor is driven by the frequency converter, the gas turbine is driven by the motor to run from a static state to a certain rotating speed, and after the gas turbine is accelerated to be capable of running independently, the gear of the motor is disengaged from the gear box of the gas turbine, so that the motor starting process is completed; when a commercial power supply exists, the commercial power supply is input through an input breaker, and is rectified by a rectifier and converted by an inverter, a stable alternating current power supply is output and connected to a frequency converter, the motor is driven by the frequency converter, the motor drives a gas turbine gearbox, the gas turbine runs from a static state to reach a certain rotating speed, and after the gas turbine is accelerated to be capable of running independently, a gear of the motor is disengaged from the gas turbine gearbox, so that the starting process of the motor is completed; meanwhile, after the commercial power supply is rectified by the rectifier, the battery pack is charged by the bidirectional converter; the motor is started through the frequency converter, so that the starting current of the motor can be reduced, the discharging time and the service life of the battery pack are prolonged, and meanwhile, the battery pack is charged through a mains supply to supplement the energy of the battery pack.
Drawings
FIG. 1 is a schematic diagram of an electric motor starting power supply apparatus of a gas turbine power plant according to an embodiment;
fig. 2 is a schematic diagram of an embodiment of a UPS module;
FIG. 3 is a schematic diagram of a battery module according to an embodiment;
fig. 4 is a schematic structural diagram of a dual power switch module according to an embodiment.
Description of reference numerals:
1. a UPS module;
11. a bidirectional converter;
12. a rectifier;
13. an inverter;
14. a static switch;
15. an output breaker;
16. an input breaker;
17. a bypass circuit breaker;
18. repairing the circuit breaker;
2. a battery module;
21. a battery pack;
22. a BMS battery management unit;
23. a display;
24. a battery circuit breaker;
3. a dual power switch module;
31. a mains circuit breaker;
32. a combustion engine circuit breaker;
33. a power supply controller;
4. a control module;
41. a programmable controller;
42. a control screen;
5. a frequency converter;
6. an electric motor.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
The gas turbine generator set mainly comprises a gas turbine, a three-phase alternating current synchronous generator, a fuel oil system, a lubricating oil system, a control system, an air intake and exhaust system, an auxiliary power supply system, a set underframe and the like.
The gas turbine generator set is mainly applied to essential standby power supplies in important places such as petroleum and petrochemical industry, telecommunication, high-rise buildings, hotels, living quarters, airports, banks, hospitals, armies, conference centers, islands and the like.
Referring to fig. 1-3, the present embodiment provides a motor start power supply apparatus for a gas turbine generator set, including a UPS uninterruptible power supply module 1, a battery module 2, a control module 4, a frequency converter 5, and a motor 6;
the UPS uninterruptible power supply module 1 includes an input breaker 16, a rectifier 12, a bidirectional converter 11, an inverter 13, and an output breaker 15, where one end of the input breaker 16 is connected to a commercial power supply, and the other end is connected to an input end of the rectifier 12, an output end of the rectifier 12 is connected to the bidirectional converter 11 and the inverter 13, the bidirectional converter 11 is connected to the inverter 13, and the inverter 13 is connected to the output breaker 15;
the battery module 2 comprises a battery breaker 24 and a battery pack 21, and the battery pack 21 is connected to the bidirectional converter 11 through the battery breaker 24;
one end of the frequency converter 5 is connected with the output breaker 15, and the other end of the frequency converter is connected with the motor 6;
the control module 4 comprises a programmable controller 41 and a control panel 42, the control panel 42 is connected to the programmable controller 41, and the programmable controller 41 is connected to the control ends of the input breaker 16, the output breaker 15 and the battery breaker 24 and the frequency converter 5. Control instructions can be sent to the programmable controller 41 through the control panel 42, and the programmable controller 41 can be used for opening and closing the output circuit breaker 15, the input circuit breaker 16 and the battery circuit breaker 24; and can control the start and stop of the frequency converter 5.
The device mainly comprises a commercial power mode and a battery mode. The commercial power mode: when the commercial power is normal, the commercial power is input through the input circuit breaker 16, and then is divided into two loops to work simultaneously, one loop is rectified by the rectifier 12, and then is charged to the battery pack 21 through the bidirectional converter 11, wherein the bidirectional converter 11 is mainly responsible for monitoring and managing the charging and discharging processes of the battery pack 21 and performing direct-current voltage conversion; the other path is rectified by a rectifier 12, then converted by an inverter 13, and then outputs a stable alternating current power supply, and then is connected to an output breaker 15, and is output to the frequency converter 5 through the output breaker 15, and the stable alternating current power supply is provided for starting the motor 6 through the frequency converter 5. Battery mode: when the utility power is abnormal, the direct current stored in the battery pack 21 is connected to the inverter 13 through the battery breaker 24 and the bidirectional converter 11, the direct current is converted into alternating current, then the alternating current is output to the frequency converter 5 through the output breaker 15, and the stable alternating current power is provided to the motor 6 through the frequency converter 5 for starting. The motor 6 is driven by the frequency converter 5, the gear box of the gas turbine is driven by the motor 6, the gas turbine runs from a static state to reach a certain rotating speed, and after the gas turbine runs independently, the gear of the motor 6 is disengaged from the gear box of the gas turbine, so that the starting process of the motor 6 is completed. The battery mode is particularly suitable for application in a vehicle-mounted gas turbine power supply vehicle starting system. The frequency converter 5 usually adopts VVVF frequency conversion or vector control frequency conversion technology, and converts the power frequency ac power into dc power through the rectifier 12, and then converts the dc power into ac power with controllable frequency and voltage to supply to the motor 6. The motor driven by the frequency converter 5 has small starting current and small impact force, so that the motor 6 can be driven by the frequency converter 5 to start smoothly. The motor 6 is started through the frequency converter 5, so that the starting current of the motor 6 can be reduced, the generation of large impact current on a power supply system is avoided, the discharging time and the service life of the battery pack 21 are prolonged, and meanwhile, the battery pack 21 is charged through a mains supply to supplement the energy of the battery pack 21.
Referring to fig. 4, in this embodiment, in order to further ensure that the energy of the battery pack 21 is sufficient, the dual-power-supply switch module 3 is further included, the dual-power-supply switch module 3 includes a commercial power breaker 31, a combustion engine breaker 32 and a power controller 33, one end of the commercial power breaker 31 is connected to a commercial power supply, the other end is connected to the input breaker 16, one end of the combustion engine breaker 32 is connected to the combustion engine power supply, the other end is connected to the input breaker 16, and the power controller 33 is connected to the control ends of the commercial power breaker 31 and the combustion engine breaker 32 and the programmable controller. When a commercial power supply is input through the commercial power breaker 31 and the input breaker 16, the motor 6 is driven through the frequency converter 5, or the direct current of the battery pack 21 is converted through the inverter 13 and then is driven through the frequency converter 5 to drive the motor 6, so that the starting of the gas turbine is completed; when the gas turbine is started and operates normally, the gear of the motor 6 is disengaged from the gas turbine gear box, and the starting procedure is completed; then, the power output by the generator 6 group of the gas turbine charges the battery pack 21 through the gas turbine circuit breaker 32, the input circuit breaker 16, the rectifier 12 and the bidirectional converter 11 in the dual power switch module 3, so as to ensure that the energy of the battery pack 21 is sufficient. The power controller 33 can detect whether the voltages of the commercial power supply and the gas turbine power supply are abnormal or not, and accordingly controls the opening and closing of the commercial power circuit breaker 31 and the gas turbine circuit breaker 32, so that the commercial power supply and the gas turbine power supply can be switched over with each other. The power controller 33 is connected to the programmable controller 41, and the programmable controller 41 controls the power controller 33 to select the switching between the commercial power supply and the combustion engine power supply.
Referring to fig. 3, in the present embodiment, in order to detect the failure of the battery pack 21, the battery module 2 further includes a BMS battery management unit 22 and a display 23, and the BMS battery management unit 22 is connected to the battery pack 21 and the display 23. The BMS battery management unit 22 is used for detecting the voltage, the current and the temperature of the single batteries in the battery pack 21, carrying out current sharing management on the single batteries of the battery pack 21, detecting the charging and discharging of the battery pack 21, managing the SOC and the SOH, realizing the functions of alarm management, report analysis and the like, further realizing timely fault identification, early warning and active isolation of the battery pack 21. The display 23 displays the voltage, current, temperature, SOC, and SOH parameters of the unit cells of the battery pack 21. The BMS (Battery MANAGEMENT SYSTEM) BATTERY management unit can accurately estimate the State of Charge (SOC) of the power BATTERY pack 21, namely the remaining BATTERY capacity, ensure that the SOC is maintained in a reasonable range, prevent the damage to the BATTERY due to overcharge or over-discharge, and display the remaining energy of the energy storage BATTERY of the hybrid electric vehicle, namely the State of Charge of the energy storage BATTERY at any time; in the process of charging and discharging the batteries, the terminal voltage and temperature, the charging and discharging current and the total voltage of the battery pack of each battery in the storage battery pack of the electric automobile are collected in real time, so that the overcharge or overdischarge phenomenon of the batteries is prevented. Meanwhile, the battery condition can be given in time, the battery with the problem can be selected, the reliability and the high efficiency of the operation of the whole battery set are maintained, and the realization of the residual electric quantity estimation model becomes possible. The battery pack 21 is a lithium iron phosphate battery. Compared with other types of batteries, the lithium iron phosphate battery has the advantages of high monomer output voltage, wide working temperature range, high specific energy, high efficiency, low self-discharge rate and high-rate discharge performance. The battery pack 21 functions as: the UPS module 1 is supplied with direct current power supply, and the battery pack 21 is supplied with supplementary electric energy by commercial power supply or combustion engine power supply.
Referring to fig. 2, in the embodiment, in order to start the motor 6 when the UPS module 1 is overloaded and the rectifier 12 or the inverter 13 has a fault, the UPS module 1 further includes a bypass breaker 17 and a static switch 14, one end of the bypass breaker 17 is connected to the utility power, the other end of the bypass breaker 17 is connected to the output breaker 15 through the static switch 14, and a control end of the bypass breaker 17 is connected to the programmable controller 41. When the UPS uninterruptible power supply module 1 is overloaded, the rectifier 12 or the inverter 13 has a fault, or a bypass instruction is received, the UPS uninterruptible power supply module 1 converts the mode into a bypass mode to output, that is, the utility power supply is connected to the frequency converter 5 through the bypass breaker 17, the static switch 14 and the output breaker 15, and then directly supplies power to the motor 6, so that the motor 6 is started. The static switch 14 is used for switching the UPS uninterruptible power supply system to the bypass mode output when the mains supply has large voltage fluctuation. Wherein the opening and closing of the bypass breaker 17 can be controlled by the programmable controller 41.
Referring to fig. 2, in this embodiment, in order to start the motor 6 when the UPS module 1 is repaired, the UPS module 1 includes a maintenance circuit breaker 18, one end of the maintenance circuit breaker 18 is connected to the commercial power source, the other end of the maintenance circuit breaker 18 is connected to the frequency converter 5, and a control end of the maintenance circuit breaker 18 is connected to the programmable controller 41. When UPS uninterrupted power source module 1 overhauls, can be closed through manual or automatic control maintenance circuit breaker 18, input circuit breaker 16 and bypass circuit breaker 17 disconnection simultaneously, mains supply is connected with converter 5 through maintenance circuit breaker 18, directly supplies power for motor 6, realizes that motor 6 starts, can overhaul UPS uninterrupted power source module 1 simultaneously. Wherein the opening and closing of the service breaker 18 can be controlled by a programmable controller 41.
It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications of the embodiments described herein, or the equivalent structure or equivalent process changes made by the contents of the specification and the drawings of the present invention, directly or indirectly apply the above technical solutions to other related technical fields, all included in the scope of the present invention.
Claims (6)
1. A motor starting power supply device of a gas turbine generator set is characterized by comprising a UPS module, a battery module, a control module, a frequency converter and a motor;
the UPS module comprises an input breaker, a rectifier, a bidirectional converter, an inverter and an output breaker, wherein one end of the input breaker is connected to a mains supply, the other end of the input breaker is connected to the input end of the rectifier, the output end of the rectifier is connected to the bidirectional converter and the inverter, the bidirectional converter is connected to the inverter, and the inverter is connected to the output breaker;
the battery module comprises a battery breaker and a battery pack, and the battery pack is connected to the bidirectional converter through the battery breaker;
one end of the frequency converter is connected with the output circuit breaker, and the other end of the frequency converter is connected with the motor;
the control module comprises a programmable controller and a control panel, the control panel is connected to the programmable controller, and the programmable controller is connected to the control ends of the input breaker, the output breaker and the battery breaker and the frequency converter.
2. The motor-started power supply unit of a gas turbine generator set according to claim 1, further comprising a dual power switch module, wherein the dual power switch module comprises a mains circuit breaker, a gas turbine circuit breaker and a power supply controller, one end of the mains circuit breaker is connected to a mains power supply, the other end of the mains circuit breaker is connected to an input circuit breaker, one end of the gas turbine circuit breaker is connected to the gas turbine power supply, the other end of the gas turbine circuit breaker is connected to the input circuit breaker, and the power supply controller is connected to the control ends of the mains circuit breaker and the gas turbine.
3. The gas turbine generator set motor start power supply assembly of claim 1, wherein said battery module further comprises a BMS battery management unit and a display, said BMS battery management unit being connected to the battery pack and the display.
4. The gas turbine generator set motor start power supply apparatus as set forth in claim 1, wherein said UPS uninterruptible power supply module further comprises a bypass breaker and a static switch, one end of said bypass breaker is connected to a mains supply, the other end of said bypass breaker is connected to an output breaker through said static switch, and a control end of said bypass breaker is connected to said programmable controller.
5. A gas turbine generator set motor start power supply apparatus as set forth in claim 1, wherein said UPS uninterruptible power supply module includes a maintenance circuit breaker having one end connected to a mains power supply and the other end connected to a frequency converter, and a control end connected to a programmable controller.
6. The gas turbine generator set motor starting power supply device according to claim 1, wherein the battery pack is a lithium iron phosphate battery.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921155530.8U CN211321240U (en) | 2019-07-23 | 2019-07-23 | Motor starting power supply device of gas turbine generator set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921155530.8U CN211321240U (en) | 2019-07-23 | 2019-07-23 | Motor starting power supply device of gas turbine generator set |
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| CN211321240U true CN211321240U (en) | 2020-08-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417302A (en) * | 2019-07-23 | 2019-11-05 | 福建侨龙应急装备有限公司 | A motor starting power supply device for a gas turbine generating set |
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- 2019-07-23 CN CN201921155530.8U patent/CN211321240U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417302A (en) * | 2019-07-23 | 2019-11-05 | 福建侨龙应急装备有限公司 | A motor starting power supply device for a gas turbine generating set |
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