CN102969963A - Self-started motor system of micro gas turbine - Google Patents
Self-started motor system of micro gas turbine Download PDFInfo
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- CN102969963A CN102969963A CN2012105368222A CN201210536822A CN102969963A CN 102969963 A CN102969963 A CN 102969963A CN 2012105368222 A CN2012105368222 A CN 2012105368222A CN 201210536822 A CN201210536822 A CN 201210536822A CN 102969963 A CN102969963 A CN 102969963A
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Abstract
The invention discloses a self-started motor system of a micro gas turbine, belonging to the field of gas turbines. The system comprises a micro gas turbine, a three-phase high-speed permanent magnetic motor, a PWM (Pulse-Width Modulation) voltage type converter and a PWM voltage type inverter which are connected in sequence, wherein the motor system further comprises a storage battery assembly. The storage battery assembly comprises a storage battery controller and a storage battery pack which are connected with each other; and an anode and cathode connecting end of the storage battery controller is connected with an anode and cathode connecting end of the PWM voltage type converter. The storage battery assembly is additionally arranged on the basis of the power generation system of the original micro gas turbine, thereby realizing two-way flowing of energy in the motor system, and achieving the starting and power generation integration control of the micro gas turbine by fully utilizing the power and dynamic two-way control of the high-speed permanent magnetic synchronous motor. The self-started motor system is applicable to power generation systems of the gas turbines.
Description
Technical field
But the present invention relates to a kind of miniature gas turbine electric system of self-starting, belong to the gas turbine field.
Background technology
The miniature gas turbine power station has the advantages such as startup is fast, the life-span is long, lightweight, the operation noise is low, operating cost is low, the high and low pollution feature of environmental protection of combustion efficiency is good, can be used as mobile power supply and stand-by power supply, be applied to the applications such as oil field, offshore oil probing production platform, mining area.
Permagnetic synchronous motor has the advantages such as power-mass ratio is large, generating efficiency is high, good reliability, all adopts permagnetic synchronous motor in the miniature gas turbine at present.
In gas turbine generating system, existing technical scheme generally adopts miniature gas turbine to drive permagnetic synchronous motor through the gear rotational speed case, obtains direct current through PWM controlled rectification link, obtains three-phase alternating current output through the PWM voltage source inverter again.Prior art scheme theory diagram as shown in Figure 1.
Analyze existing gas turbine generating system, can find:
Miniature gas turbine can not self-starting, and needing starter that miniature gas turbine is dragged to certain rotating speed could ignition operation, and whole circuit energy is one-way flow, therefore can't realize the startup-generating integrated control to motor.When using existing gas turbine generating system to generate electricity, need the extra starter that uses, make system configuration more complicated, increased cost, do not meet the modernization of electricity generation system, the requirement of automation.
Summary of the invention
In view of this, but the invention provides a kind of miniature gas turbine electric system of self-starting, native system has been realized the two-way flow of energy, thereby can start miniature gas turbine-generating integrated control; Simultaneity factor is simple in structure, and cost is low, and reliability is high.
For achieving the above object, technical scheme of the present invention is:
But a kind of miniature gas turbine electric system of self-starting, comprise miniature gas turbine, three-phase high-speed permanent magnet motor, PWM voltage-type current transformer, PWM voltage source inverter, miniature gas turbine and the coaxial mechanical connection of three-phase high-speed permanent magnet motor, the three-phase link of three-phase high-speed permanent magnet motor connects the three-phase link of PWM voltage-type current transformer, the dc terminal both positive and negative polarity of PWM voltage-type current transformer connects respectively the dc terminal both positive and negative polarity of PWM voltage source inverter, and the three-phase link of PWM voltage source inverter connects the three-phase link of electrical network.
Wherein, this electric system also comprises accumulator cell assembly.
Accumulator cell assembly comprises interconnective battery controller and batteries; The both positive and negative polarity link of battery controller connects the both positive and negative polarity link of PWM voltage-type current transformer;
Battery controller setting voltage threshold range [a, b], a＜b, battery controller detects the dc terminal voltage of PWM voltage-type current transformer, when the dc terminal voltage of PWM voltage-type current transformer during less than voltage threshold a, battery controller control batteries is in discharge condition, for PWM voltage-type current transformer provides direct voltage; When the dc terminal voltage of PWM voltage-type current transformer during greater than voltage threshold b, battery controller control batteries is in charged state, and PWM voltage-type current transformer dc terminal provides charging voltage for batteries; When the dc terminal voltage of PWM voltage-type current transformer is in voltage threshold scope [a, b] when interior, accumulator cell assembly is in off position; Wherein a value is greater than the discharge voltage of batteries.
PWM voltage-type current transformer has two kinds of mode of operations, be respectively: inverter mode and controlled rectification pattern, PWM voltage-type current transformer is by detecting the rotating speed of its three-phase link ac voltage and alternating current flow valuve estimation miniature gas turbine, when rotating speed during less than the fire speed of miniature gas turbine, PWM voltage-type current transformer is in inverter mode, and inverter mode is converted to three-phase alternating voltage by the three-phase link output of PWM voltage-type current transformer with the direct voltage of the dc terminal input of PWM voltage-type current transformer; When rotating speed during more than or equal to the fire speed of miniature gas turbine, PWM voltage-type current transformer is in the controlled rectification pattern, and the controlled rectification pattern is converted to direct voltage by the dc terminal output of PWM voltage-type current transformer with the three-phase alternating voltage of the three-phase link of PWM voltage-type current transformer.
Beneficial effect:
The present invention increases accumulator cell assembly on the basis of original generation system of micro turbine, realized the two-way flow of electric system self-energy, take full advantage of the two-way control of electric power and the power of high-speed permanent magnetic synchronous motor, realized miniature gas turbine startup-generating integrated control, greatly improved the automaticity of generation system of micro turbine, simultaneity factor is simple in structure, and cost is low, and reliability is high.
Description of drawings
Fig. 1 is existing generation system of micro turbine composition frame chart.
Fig. 2 is gas turbine generating system composition frame chart of the present invention.
Embodiment
Below in conjunction with the accompanying drawing embodiment that develops simultaneously, describe the present invention.
But the invention provides a kind of miniature gas turbine electric system of self-starting, this system mainly comprises miniature gas turbine, the three-phase high-speed permanent magnet motor, PWM voltage-type current transformer, PWM voltage source inverter and accumulator cell assembly, its connected mode as shown in Figure 2, be specially: miniature gas turbine and the coaxial mechanical connection of three-phase high-speed permanent magnet motor, the three-phase link of three-phase high-speed permanent magnet motor connects the three-phase link of PWM voltage-type current transformer, the dc terminal both positive and negative polarity of PWM voltage-type current transformer connects respectively the dc terminal both positive and negative polarity of PWM voltage source inverter, the three-phase link of PWM voltage source inverter connects the three-phase link of electrical network, and accumulator cell assembly comprises battery controller and batteries; Batteries is connected with battery controller, and the both positive and negative polarity link of battery controller connects the both positive and negative polarity link of PWM voltage-type current transformer.
Described battery controller setting voltage threshold range [a, b], a＜b, battery controller detects the dc terminal voltage of PWM voltage-type current transformer, when the dc terminal voltage of PWM voltage-type current transformer during less than voltage threshold a, battery controller control batteries is in discharge condition, for PWM voltage-type current transformer provides direct voltage; When the dc terminal voltage of PWM voltage-type current transformer during greater than voltage threshold b, battery controller control batteries is in charged state, and PWM voltage-type current transformer dc terminal provides charging voltage for batteries; When the dc terminal voltage of PWM voltage-type current transformer is in voltage threshold scope [a, b] when interior, accumulator cell assembly is in off position; Wherein a value is greater than the discharge voltage of batteries.
PWM voltage-type current transformer has two kinds of mode of operations, be respectively: inverter mode and controlled rectification pattern, PWM voltage-type current transformer is by detecting the rotating speed of its three-phase link ac voltage and alternating current flow valuve estimation miniature gas turbine, when rotating speed during less than the fire speed of miniature gas turbine, PWM voltage-type current transformer is in inverter mode, and inverter mode is converted to three-phase alternating voltage by the three-phase link output of PWM voltage-type current transformer with the direct voltage of the dc terminal input of PWM voltage-type current transformer; When rotating speed during more than or equal to the fire speed of miniature gas turbine, PWM voltage-type current transformer is in the controlled rectification pattern, and the controlled rectification pattern is converted to direct voltage by the dc terminal output of PWM voltage-type current transformer with the three-phase alternating voltage of the three-phase link of PWM voltage-type current transformer.
This miniature gas turbine is as follows with the workflow of high-speed permanent magnetic synchronous motor system:
In the gas turbine initial operation phase, the dc terminal no-output voltage of PWM voltage-type current transformer, then batteries is in discharge condition, provide direct voltage by batteries by battery controller, this dc voltage value is stabilized in a numerical value, direct voltage inputs to PWM voltage-type current transformer by the dc terminal of PWM voltage-type current transformer, PWM voltage-type current transformer is by detecting the rotating speed of its three-phase link ac voltage and alternating current flow valuve estimation miniature gas turbine, because of the rotating speed of miniature gas turbine less than its fire speed, so PWM voltage-type current transformer is in inverter mode, direct voltage becomes three-phase alternating voltage through PWM voltage-type current transformer and exports to drive permagnetic synchronous motor, permanent-magnetic synchronous motor rotor rotates and drags the micro-gas-turbine machine rotor and rotates, because this moment, dc voltage value was lower, permagnetic synchronous motor does not reach the generating rotating speed, so permagnetic synchronous motor does not generate electricity this moment; PWM voltage-type current transformer is in inverter mode always, and because the dc terminal voltage of PWM voltage-type current transformer is provided by the discharge voltage of batteries always, therefore the dc terminal voltage of PWM voltage-type current transformer is less than the voltage threshold scope [a of battery controller, b], so batteries is in discharge condition always.
Regulate PWM voltage-type current transformer, can control the ac voltage of its three-phase link output, the rotor speed of permagnetic synchronous motor is directly proportional with the alternating current voltage frequency of its three-phase link, therefore increase the alternating current voltage frequency of PWM voltage-type current transformer three-phase link output, can control the permanent-magnetic synchronous motor rotor rotating speed increases gradually, the velocity of rotation of the rotor of miniature gas turbine increases thereupon gradually, when rotor rotation speed reaches fire speed, the miniature gas turbine automatic ignition, miniature gas turbine starts after the igniting; After the startup, miniature gas turbine rotates by the runner that coaxial mechanical structure drives permagnetic synchronous motor, make permagnetic synchronous motor accelerate to the generating rotating speed, then this moment, permagnetic synchronous motor was in generating state, system is in the generator operation stage, this moment, PWM voltage-type current transformer was by detecting the rotating speed of its three-phase link ac voltage and alternating current flow valuve estimation miniature gas turbine, because the rotating speed of miniature gas turbine has reached its fire speed, PWM voltage-type current transformer is in the controlled rectification pattern, the controlled rectification pattern is converted to the three-phase alternating voltage of permagnetic synchronous motor output direct voltage and exports electrical network to by the PWM voltage source inverter, when the dc terminal voltage of PWM voltage-type current transformer during greater than the voltage threshold scope of battery controller, battery controller control batteries is in charged state.
In sum, more than be preferred embodiment of the present invention only, be not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. but the miniature gas turbine electric system of a self-starting, comprise miniature gas turbine, the three-phase high-speed permanent magnet motor, PWM voltage-type current transformer, the PWM voltage source inverter, miniature gas turbine and the coaxial mechanical connection of three-phase high-speed permanent magnet motor, the three-phase link of three-phase high-speed permanent magnet motor connects the three-phase link of PWM voltage-type current transformer, the dc terminal both positive and negative polarity of PWM voltage-type current transformer connects respectively the dc terminal both positive and negative polarity of PWM voltage source inverter, the three-phase link of PWM voltage source inverter connects the three-phase link of electrical network, it is characterized in that this electric system also comprises accumulator cell assembly;
Described accumulator cell assembly comprises interconnective battery controller and batteries; The both positive and negative polarity link of battery controller connects the both positive and negative polarity link of PWM voltage-type current transformer;
Described battery controller setting voltage threshold range [a, b], a＜b, battery controller detects the dc terminal voltage of PWM voltage-type current transformer, when the dc terminal voltage of PWM voltage-type current transformer during less than voltage threshold a, battery controller control batteries is in discharge condition, for PWM voltage-type current transformer provides direct voltage; When the dc terminal voltage of PWM voltage-type current transformer during greater than voltage threshold b, battery controller control batteries is in charged state, and PWM voltage-type current transformer dc terminal provides charging voltage for batteries; When the dc terminal voltage of PWM voltage-type current transformer is in voltage threshold scope [a, b] when interior, accumulator cell assembly is in off position; The a value is greater than the discharge voltage of batteries;
Described PWM voltage-type current transformer has two kinds of mode of operations, be respectively: inverter mode and controlled rectification pattern, PWM voltage-type current transformer is by detecting the rotating speed of its three-phase link ac voltage and alternating current flow valuve estimation miniature gas turbine, when rotating speed during less than the fire speed of miniature gas turbine, PWM voltage-type current transformer is in inverter mode, and inverter mode is converted to three-phase alternating voltage by the three-phase link output of PWM voltage-type current transformer with the direct voltage of the dc terminal input of PWM voltage-type current transformer; When rotating speed during more than or equal to the fire speed of miniature gas turbine, PWM voltage-type current transformer is in the controlled rectification pattern, and the controlled rectification pattern is converted to direct voltage by the dc terminal output of PWM voltage-type current transformer with the three-phase alternating voltage of the three-phase link of PWM voltage-type current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105368222A CN102969963A (en) | 2012-12-12 | 2012-12-12 | Self-started motor system of micro gas turbine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105368222A CN102969963A (en) | 2012-12-12 | 2012-12-12 | Self-started motor system of micro gas turbine |
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| CN102969963A true CN102969963A (en) | 2013-03-13 |
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| CN2012105368222A Pending CN102969963A (en) | 2012-12-12 | 2012-12-12 | Self-started motor system of micro gas turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026389A (en) * | 2018-09-14 | 2018-12-18 | 青岛云深动力科技有限公司 | Gas turbine engine systems and its control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01144400A (en) * | 1987-11-30 | 1989-06-06 | Meidensha Corp | Start system for private power generating set |
| JP2003134890A (en) * | 2001-10-16 | 2003-05-09 | Hitachi Ltd | Wind-power generator using permanent magnet type of synchronous generator, and starting method therefor |
| CN201639430U (en) * | 2010-02-22 | 2010-11-17 | 北京动力机械研究所 | Miniature gas turbine power station |
-
2012
- 2012-12-12 CN CN2012105368222A patent/CN102969963A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01144400A (en) * | 1987-11-30 | 1989-06-06 | Meidensha Corp | Start system for private power generating set |
| JP2003134890A (en) * | 2001-10-16 | 2003-05-09 | Hitachi Ltd | Wind-power generator using permanent magnet type of synchronous generator, and starting method therefor |
| CN201639430U (en) * | 2010-02-22 | 2010-11-17 | 北京动力机械研究所 | Miniature gas turbine power station |
Non-Patent Citations (1)
| Title |
|---|
| 占文涛，何礼高: "基于双向PWM变换器的微燃机发电系统起动/发电控制研究", 《通信电源技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026389A (en) * | 2018-09-14 | 2018-12-18 | 青岛云深动力科技有限公司 | Gas turbine engine systems and its control method |
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Application publication date: 20130313 |