CN201025131Y - Frequency conversion startup device of steamship engine - Google Patents
Frequency conversion startup device of steamship engine Download PDFInfo
- Publication number
- CN201025131Y CN201025131Y CNU2007200104152U CN200720010415U CN201025131Y CN 201025131 Y CN201025131 Y CN 201025131Y CN U2007200104152 U CNU2007200104152 U CN U2007200104152U CN 200720010415 U CN200720010415 U CN 200720010415U CN 201025131 Y CN201025131 Y CN 201025131Y
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- generator
- gas turbine
- breaker
- frequency
- frequency converter
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Abstract
The utility model relates to a frequency conversion starting device for gas turbine, belonging to the field of gas turbine. The utility model comprises a generator breaker, an input breaker, a multiple transformer, a frequency converter and an output isolation breaker, wherein, the generator breaker is connected with the generator; the multiple transformer is respectively connected with the input breaker and the frequency converter; the output isolation breaker is respectively connected with the frequency converter and the generator; and the gas turbine is connected with the generator. The utility model has the advantages of greatly decreasing the motor heat, noise and torque microseism caused by the harmonic wave in the frequency conversion starting process of the gas turbine, no particular requirement on the motor which can directly adopt a common synchronous or asynchronous motor, and low distortion of the input current harmonic wave of the perfect harmonic wave free high voltage frequency converter with an inputted comprehensive factor of more than 0.95.
Description
Technical field
The utility model belongs to the gas turbine field, particularly a kind of gas turbine static frequency converter.
Background technique
Gas-turbine power plant can not self-starting, and must drag to gas turbine self by other starting drive can keep on the go.What can be used as the gas turbine Starter has motor, internal-combustion engine, expansion turbine, oil hydraulic motor, an air motor etc.Motor is to use at present the most general a kind of Starting mode, it sometimes with the supporting use of frequency variator, do not need to be equipped with optional equipment and improve torque characteristics.
The frequency variator that is used for gas turbine startup usefulness at present all is load-commutated formula current source type (Load Commutated Inverter---a LCI) frequency variator.The load of LCI frequency variator is a synchronous motor, and the shutoff of thyristor mainly exchanges back-emf by the synchronous motor stator and finishes naturally, does not need to force commutation.Synchronous motor all must provide leading power factor in whole speed adjustable range, to guarantee the normal commutation of inverter thyristor, motor must have enough leakage inductances simultaneously, with the di/dt of restriction thyristor.General 6 pulse waves or the 12 pulse wave Thyristor Current Source type rectification circuit structures of adopting of current source type frequency variator, input current harmonics can reach 20% when adopting 6 pulse wave structures, input current harmonics can reduce to 10% when adopting 12 pulse wave structures, but also do not reach the IEEE519-1992 standard code the grid short circuit electric current during less than 20 times of load currents total harmonic current distortions less than 5% requirement, so need to be equipped with the input harmonics wave filter.Wave filter is bulky, and influences system effectiveness, and extra increasing invested.Filter Design and electrical network parameter and load behavior all have relation in addition, in case parameter and operating mode change, wave filter is readjusted again, and be very inconvenient, and influence filter effect.The motor added losses of harmonic wave are the copper loss of rotor consumption most serious of all, because motor rotor is to rotate near the fundamental frequency rotational speed, therefore for higher harmonic voltage, rotor always rotates under near 1 state at revolutional slip, so the copper loss of rotor consumption is bigger.Common current source type frequency variator output current wave is very similar with input current waveform, all is 120 ° square wave, and total harmonic current distortions reaches about 30%.In order to reduce output harmonic wave, the output of employing 12 pulse wave schemes are also arranged or output filter is set, output waveform has bigger improvement, but the cost of system and complexity also can increase greatly.
Summary of the invention
At problems of the prior art, the utility model provides a kind of gas turbine static frequency converter.
The utility model comprises generator breaker, input circuit breaker, multipleization transformer, frequency variator, output isolation circuit breakers.Wherein generator breaker 1 links to each other with generator 6, and multipleization transformer 3 links to each other with input circuit breaker 2, frequency variator 4 respectively, and output isolation circuit breakers 5 links to each other with frequency variator 4, generator 6 respectively, and gas turbine 7 links to each other with generator 6, as shown in Figure 1.
Wherein frequency variator 4 is no harmonic wave high voltage converter, and it adopts the mode of several low pressure PWM frequency conversion power unit series connection to realize direct high pressure output.To the power cell power supply, power cell is the AC-DC-AC PWM voltage source inverter structure of three-phase input, single-phase output, realizes that the high pressure of variable-frequency variable-voltage is directly exported, and supplies with high-tension motor after the isolating transformer step-down of multipleization of line voltage process secondary.
Working principle of the present utility model is as follows:
At turbine power plant, when gas turbine starts synchronous generator as actuating motor; Using gas turbine to provide under the situation of power, with asynchronous motor as starting electrical machinery.
Synchronous generator is during as the gas turbine starting electrical machinery, at first disconnect generator breaker, connect frequency variator input circuit breaker and output isolation circuit breakers then, control frequency variator work afterwards, this moment, excitation device was given the generator amature excitation by Frequency Converter Control, generator drags gas turbine as motor and slowly rotates raising speed from state of rest, when near the working speed of gas turbine, the control frequency variator quits work, stop excitation simultaneously, disconnect frequency variator input circuit breaker and output isolation circuit breakers again, gas turbine continues raising speed by the motivational drive of self, when near synchronous speed, adds excitation to generator again, satisfying when being incorporated into the power networks condition, connect generator breaker.
Asynchronous motor is during as the gas turbine starting electrical machinery, and except that not needing the excitation, other working procedure is identical with synchronous generator.
The utility model greatly reduce in the gas turbine variable frequency starting process by harmonic wave cause that the motor feels hot, noise and torque pulsation, and motor do not had specific (special) requirements, can directly adopt common synchronously or asynchronous motor; And the Harmonics of Input distortion of the perfect harmony high voltage converter that adopts is very low, and the comprehensive factor of its input reaches more than 0.95.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a circuit connection diagram of the present utility model.
1 is generator breaker among the figure, and 2 are frequency variator input circuit breaker, and 3 is multipleization transformer, and 4 is frequency variator, and 5 are the output isolation circuit breakers, and 6 is generator, and 7 is gas turbine.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
In this example, frequency conversion starter 4 is selected PH-6-6-7000 (880A) for use, and multipleization transformer 3 is selected PDM-10 for use, output isolation circuit breakers 5 is selected LGDH-10 for use, generator 6 is selected QFR-135-2 for use, and gas turbine 7 is selected R0110 for use, and generator machine circuit breaker 1 is selected HECS for use.
The circuit of this example connects as shown in Figure 2, the 6KV line voltage is connected to the former limit of multipleization transformer 3 by frequency variator input circuit breaker 2, behind the isolated buck of 6KV voltage through multipleization of secondary, be connected to 15 input ends of frequency variator 4 by the secondary of multipleization transformer 3, the input end of output isolation circuit breakers 5 links to each other with the three-phase output end of frequency variator 4, and the output terminal of output isolation circuit breakers 5 links to each other with the three-phase input end of generator 6; The input end of generator breaker 1 also links to each other with the three-phase input end of generator 6; Gas turbine 7 directly links to each other with generator 6.
Frequency converter output voltage is 6KV in this example, every power unit cascade that is 690V by 5 voltage ratings forms, the output phase voltage is 3450V, line voltage reaches 6KV, each power cell by one group of secondary power supply of Input transformer, reaches mutually insulated between the transformer secondary winding respectively between the power cell.Secondary winding adopts the extend-triangle connection, realizes multipleization, to reach the purpose that reduces input harmonic current.Frequency conversion in this example is the rectification circuit structure of 30 pulses, and input current waveform is near sinusoidal wave.
Claims (2)
1. gas turbine static frequency converter, comprise generator breaker, input circuit breaker, multipleization transformer, frequency variator and output isolation circuit breakers, it is characterized in that generator breaker links to each other with generator, multipleization transformer links to each other with input circuit breaker, frequency variator respectively, the output isolation circuit breakers links to each other with frequency variator, generator respectively, and gas turbine links to each other with generator.
2. a kind of gas turbine static frequency converter as claimed in claim 1 is characterized in that described frequency variator is no harmonic wave high voltage converter, and it adopts the mode of several low pressure PWM frequency conversion power unit series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200104152U CN201025131Y (en) | 2007-01-31 | 2007-01-31 | Frequency conversion startup device of steamship engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200104152U CN201025131Y (en) | 2007-01-31 | 2007-01-31 | Frequency conversion startup device of steamship engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201025131Y true CN201025131Y (en) | 2008-02-20 |
Family
ID=39098992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200104152U Expired - Fee Related CN201025131Y (en) | 2007-01-31 | 2007-01-31 | Frequency conversion startup device of steamship engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201025131Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105849390A (en) * | 2013-12-23 | 2016-08-10 | 涡轮梅坎公司 | Method and system for more reliable starting of a turbo machine |
| CN109067203A (en) * | 2018-08-07 | 2018-12-21 | 中国航空工业集团公司雷华电子技术研究所 | A kind of 30 pulse transforming rectifier of isolated buck-type |
| CN113931708A (en) * | 2021-09-29 | 2022-01-14 | 华能山东石岛湾核电有限公司 | Steam turbine barring drive circuit and device |
-
2007
- 2007-01-31 CN CNU2007200104152U patent/CN201025131Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105849390A (en) * | 2013-12-23 | 2016-08-10 | 涡轮梅坎公司 | Method and system for more reliable starting of a turbo machine |
| CN105849390B (en) * | 2013-12-23 | 2019-06-07 | 涡轮梅坎公司 | Method and system for reliably starting turbine engine |
| CN109067203A (en) * | 2018-08-07 | 2018-12-21 | 中国航空工业集团公司雷华电子技术研究所 | A kind of 30 pulse transforming rectifier of isolated buck-type |
| CN113931708A (en) * | 2021-09-29 | 2022-01-14 | 华能山东石岛湾核电有限公司 | Steam turbine barring drive circuit and device |
| CN113931708B (en) * | 2021-09-29 | 2023-11-21 | 华能山东石岛湾核电有限公司 | Steam turbine jigger driving circuit and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080220 Termination date: 20150131 |
|
| EXPY | Termination of patent right or utility model |