CN101741305A - Controller of energy-saving and noise reduction digital generator - Google Patents
Controller of energy-saving and noise reduction digital generator Download PDFInfo
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- CN101741305A CN101741305A CN200810072065A CN200810072065A CN101741305A CN 101741305 A CN101741305 A CN 101741305A CN 200810072065 A CN200810072065 A CN 200810072065A CN 200810072065 A CN200810072065 A CN 200810072065A CN 101741305 A CN101741305 A CN 101741305A
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Abstract
The invention relates to a controller of an energy-saving and noise reduction digital generator. The controller is characterized in that: a high-frequency voltage rising and reduction mix circuit module is embedded into an electric energy reprocessing system of the digital generator to ensure that a generator set can be operated at different optimum working points according to different loads. The positive and negative direct current voltages after an original output of the generator is rectified and filtered, no matter high or low, are transmitted to an integrated high-frequency voltage rising and reduction mix control circuit to output a stable voltage with a set value, and a three-phase symmetrical inverter bridge generates a three-phase four-wire output or a two-phase symmetrical inverter bridge generates a single phase output. In a step-up circuit, power supply superposing technology makes the converted power needed by the step-up circuit very small. A high-frequency digitalized control part regulates the working speed of a power machine according to a power curve and the current load power of the power machine, and can select a working point in a working range with a triple rotating speed. The energy-saving and noise reduction controller of the digital generator has the characteristics that the whole system has low noise and oil-saving operation, and is an ideal method for controlling the energy-saving and noise reduction digital generator.
Description
One, technical field
The present invention relates to the control system on the generator, refer more particularly to a kind of controller of energy-saving and noise reduction digital generator.
Two, technical background
Mostly be common generator and gasoline digital electricity generating in the market in the control method of generator, wherein the control method of common generator: AVR (automatic voltage regulator)+electronic governing system; Waveform distortion is below 5%; The fluctuation that impact load meeting is caused output frequency and voltage changes; Consider the stability of output, general rotating speed roughly need be fixed on 50Hz/1500rps, and (gasoline engine is 50Hz/3000rps to 60Hz/1800rps, 60Hz/3600rps); Fixedly under the operational mode, the power utilization rate of different load is not high for rotating speed; Especially zero load and underloading noise become excessive relatively.The following single-phase output of traditional control method of gasoline digital electricity generating: small-power 10KW is stablized output frequency by the inversion link; Control specified output speed 100%-70%; The output voltage of generator must satisfy the inverter output voltage requirement; Noise than fixed rotating speed generator under zero load and the underloading is smaller, mostly is permanent magnet generator.The power output of diesel engine can not be not fully exerted, operational efficiency is low, noise is bigger than normal and the inapparent problem of fuel-efficient effect but above-mentioned two kinds of general generators all exist.
Three, content of the present invention
The object of the invention is to overcome above-mentioned weak point of the prior art and a kind of power output that can give full play to diesel engine is provided, the operational efficiency height, and noise is low, a kind of controller of energy-saving and noise reduction digital generator of fuel-efficient operation easy to control.
The present invention realizes in the following way: in the electric energy reprocessing system of digital electricity generating, embed high frequency buck hybrid circuit module, make generating set run on different best operating points according to different load.The original output of generator behind rectifying and wave-filtering positive negative dc voltage, no matter be that height is low, send into integrated high frequency buck and mix control circuit, export stable set point voltage, produce three-phase and four-line output by three symmetrical inverter bridge again or two symmetrical inverter bridge produce single-phase output; In booster circuit, use the power supply superimposing technique to make that the required transform power of booster circuit is very little, thereby efficient obtain the best; High-frequency digital chemical control system partly removes to regulate the working speed of engine according to engine power curve and present load power, can be in the selected working point of 3 times rotary speed working scope.As the generator of a 200KW as long as the boost power of booster circuit reaches 25KW (positive supply 12.5KW, negative supply 12.5KW) just can meet the demands, the CPU part removes to regulate the working speed of engine according to engine power curve and present load power, adjustment is boosted and the reduction voltage circuit operating state according to output voltage, in the booster circuit work during less than set point of the output voltage of motor, work greater than the set point reduction voltage circuit.
The invention has the advantages that:
1. noise
Unloaded: general common generating set work will be considered the stability of output, and general rotating speed roughly needs 500 rev/mins/50Hz of stuck-at-, and 1800 rev/mins/60Hz (gasoline engine is 50Hz/3000rps, and 60Hz/3600rps), noise is bigger.And the digital electricity generating group that adopts controller of energy-saving and noise reduction digital generator is operated in the idling work state of 800～850 commentaries on classics (gasoline engine is 1500rps), and noise is little.
Fully loaded: general diesel generating set is operated in 1500 rev/mins/50Hz, 1800 rev/mins/60Hz (gasoline engine is 50Hz/3000rps, 60Hz/3600rps), general digital gasoline engine generator group is operated in 4500 rev/mins, and (gasoline engine is 4500～5000rps) and the generating set of employing controller of energy-saving and noise reduction digital generator is operated in 2100～2400 commentaries on classics; But since the power specification of the engine supporting with it little 40%～50%, overall volume is also little a lot, noise still can be littler than common generator;
2. energy-conservation contrast
Unloaded: general diesel generating set work will be considered the stability of output, general rotating speed roughly needs 500 rev/mins/50Hz of stuck-at-, 1800 rev/mins/60Hz, the work of general digital gasoline engine generator group roughly need be fixed on 3000 rev/mins, and adopts the generating set of controller of energy-saving and noise reduction digital generator to be operated in 800～850 commentaries on classics (gasoline engine 1500rps); Rotating speed is low, power is little, unloaded oil consumption is little.
Fully loaded: general generating set is operated in 1500 rev/mins/50Hz, and 1800 rev/mins/60Hz, and adopt the generating set of controller of energy-saving and noise reduction digital generator to be operated in 2100～2400 commentaries on classics; But since the power specification of the engine supporting with it little 40%～50%, overall volume is also little a lot, the oil consumption of work is still lower than common generator.
Conclusion: the generating set that adopts energy-saving and cost-reducing generator set controller control, because the power specification of the engine supporting with it is little a lot, therefore output is with the electric energy of constant power, its high efficiency a lot, so all played good energy-saving effect to fully loaded from zero load.
Four, description of drawings
Fig. 1 three-phase four-wire power power supply of the present invention voltage stabilizing and engine rotating speed control section structural representation;
Fig. 2 three-phase four-wire power power supply of the present invention voltage stabilizing and engine rotating speed control section circuit diagram;
Fig. 3 single phase poaer supply power supply of the present invention voltage stabilizing and engine rotating speed control section structural representation;
Fig. 4 single phase poaer supply power supply of the present invention voltage stabilizing and engine rotating speed control section circuit diagram;
Fig. 5 single-phase/three-phase frequency conversion of the present invention part-structure schematic diagram;
Fig. 6 three phase variable frequency partial circuit of the present invention structural representation;
The single-phase frequency conversion partial circuit of Fig. 7 the present invention structural representation;
Fig. 8 power control part component software of the present invention frame diagram;
Fig. 9 frequency conversion part of the present invention software frame figure;
Figure 10 display part of the present invention software frame figure;
Five, the specific embodiment of the invention
The specific embodiment of the invention now is described in detail in detail in conjunction with the accompanying drawings:
As Fig. 1, shown in Figure 3, in the electric energy reprocessing system of digital electricity generating, embed high frequency buck hybrid circuit module, make generating set run on different best operating points according to different load.The original output of generator behind rectifying and wave-filtering positive negative dc voltage, no matter be that height is low, send into integrated high frequency buck and mix control circuit, export stable set point voltage, produce three-phase and four-line output by three symmetrical inverter bridge again or two symmetrical inverter bridge produce single-phase output; In booster circuit, use the power supply superimposing technique to make that the required transform power of booster circuit is very little, thereby efficient obtain the best; High-frequency digital chemical control system partly removes to regulate the working speed of engine according to engine power curve and present load power, can be in the selected working point of 3 times rotary speed working scope.As the generator of a 200KW as long as the boost power of booster circuit reaches 25KW (positive supply 12.5KW, negative supply 12.5KW) just can meet the demands, the CPU part removes to regulate the working speed of engine according to engine power curve and present load power, adjustment is boosted and the reduction voltage circuit operating state according to output voltage, in the booster circuit work during less than set point of the output voltage of motor, work greater than the set point reduction voltage circuit.Frequency conversion part IGBT module principle is the same with common frequency converter, and just output frequency can only be arranged to 50/60Hz, also can make variable frequency power supply as required; Frequency conversion output is filtered into sine wave by LC; Detect output current through current transformer then, output voltage is detected carry out the voltage adjustment, voltage detecting is incorporated into the power networks according to having or not of setting at the interchange output circuit and adds the electrical network phase-detection, only starts the contactless incision of being incorporated into the power networks when phase place is entirely true; Just can two or many generator parallel operation operations to parallel operation as long as detect synchronizing signal.All running parameters are set in the display part; Monitoring also shows current working state; Man machine operation interface.
As shown in Figure 2, generator output 90～340VAC (DC130～440V) through rectifier diode and filter capacitor output galvanic current, boost through G1～G4 again and be the output voltage of setting, reduction voltage circuit G5～G6 is a fully conducting state when booster circuit work and voltage are lower than step-down output set point, and only reduction voltage circuit is just worked when voltage surpasses the set point of step-down.The DSP/CPU plate uses the TMS320F28xx series DSP of TI, catches the work at present rotating speed; AD detects output voltage, booster circuit output voltage, reduction voltage circuit output voltage, the output current of generator, calculates power output according to output current and potentiometer; According to power output control generator working speed; PWM exports and controls throttle, boosts, reduction voltage circuit IGBT work.Serial ports shows operating state output and display circuit.
As shown in Figure 4, generator output 90～340VAC (DC130～440V) through rectifier diode and filter capacitor output galvanic current, boost through G1～G2 again and be the output voltage of setting, reduction voltage circuit G3 is a fully conducting state when booster circuit work and voltage are lower than step-down output set point, and only reduction voltage circuit is just worked when voltage surpasses the set point of step-down.The DSP/CPU plate uses the TMS320F28xx series DSP of TI, catches the work at present rotating speed; AD detects output voltage, booster circuit output voltage, reduction voltage circuit output voltage, the output current of generator, calculates power output according to output current and potentiometer; According to power output control generator working speed; PWM exports and controls throttle, boosts, reduction voltage circuit IGBT work.Serial ports shows operating state output and display circuit.
As Fig. 5, Fig. 6, shown in Figure 7, the IGBT module is just chosen according to output voltage, and the 600V device is used in 110VAC/120VAC/130VAC/140VAC output, the above 1200V device that uses of 220VAC; Electric current 75A～6000A; The LC filter circuit uses the metal-powder-core magnet ring; Drives partly drives for light-coupled isolation, and driving IGBT upper arm power supply is independent current source; AC output current detecting is used common instrument transformer; The DC current detecting is used Hall current sensor; The DSP/CPU plate uses T worker's TMS320F28x series DSP, starts frequency converter work when detecting input voltage and reach the voltage request that sets, and operating state is exported to display circuit shows.
As Fig. 8, Fig. 9, shown in Figure 10; mains switch is opened the display part, back and is set (unit/stand-by power supply/work of being incorporated into the power networks) according to the user; whether being set to stand-by power supply in this way, can to detect power supply normal, can switch generator work as undesired, in addition two kinds all can the work of across-the-line starting generator.Also can switch to manual operation.Be shown to power module and variable frequency module power supply; power module self check at once and starter-generator immediately; after detecting dynamic start, close starter at once; the power module power supply also switches to generator powered; while is also detected the output voltage of generator; the undesired in this way shows signal of giving is immediately also shut down, and voltage is normally slowly opened the step-down control module and given circuit precharge.Deng (stand-by period can be provided with) after 2～20 seconds; the work of starting booster circuit; (also chance detects synchronous control signal in this way to start frequency conversion output after 2 seconds; the frequency-variable module that is incorporated into the power networks can detect outer net); the operating state of display module monitoring whole generating machine; join wireless monitor in this way and can signal to the monitoring point working state signal, the fault shutdown of can reporting to the police is arranged.
Power module carries out the working speed of Redundant Control generator according to bearing power, and booster circuit and reduction voltage circuit are controlled according to required output voltage, in the booster circuit work during less than the voltage of need output of the output voltage of motor, greater than output voltage reduction voltage circuit work, boosting and step-down is done redundant computation and done corresponding switching for reducing circuit loss.Be the stack of boosting as the 200KW generator below output 130KW, surpassing 130KW is step-down control.
Frequency-variable module starts output according to having or not input voltage and being provided with; Voltage is monitored; The output voltage deviation is adjusted.
Claims (2)
1. a controller of energy-saving and noise reduction digital generator is characterized in that: in the electric energy reprocessing system of digital electricity generating, embed high frequency buck hybrid circuit module, make generating set run on different best operating points according to different load.
2. a kind of controller of energy-saving and noise reduction digital generator according to claim 1, it is characterized in that: the original output of generator behind rectifying and wave-filtering positive negative dc voltage, no matter be that height is low, send into integrated high frequency buck and mix control circuit, export stable set point voltage, produce three-phase and four-line output by three symmetrical inverter bridge again or two symmetrical inverter bridge produce single-phase output; In booster circuit, use the power supply superimposing technique to make that the required transform power of booster circuit is very little; High-frequency digital chemical control system partly removes to regulate the working speed of engine according to engine power curve and present load power, can be in the selected working point of 3 times rotary speed working scope.
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| CN200810072065A CN101741305A (en) | 2008-11-06 | 2008-11-06 | Controller of energy-saving and noise reduction digital generator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570953A (en) * | 2012-01-06 | 2012-07-11 | 武汉理工大学 | Network source converting and voltage-stabilizing device |
| CN108418478A (en) * | 2018-01-31 | 2018-08-17 | 东莞市力辉马达有限公司 | A kind of noise-reduction method of high-speed DC brushless electric machine |
| CN113472268A (en) * | 2021-06-04 | 2021-10-01 | 中国人民解放军海军工程大学 | High-power motor excitation device and control method |
-
2008
- 2008-11-06 CN CN200810072065A patent/CN101741305A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570953A (en) * | 2012-01-06 | 2012-07-11 | 武汉理工大学 | Network source converting and voltage-stabilizing device |
| CN102570953B (en) * | 2012-01-06 | 2014-10-01 | 武汉理工大学 | Network source converting and voltage-stabilizing device |
| CN108418478A (en) * | 2018-01-31 | 2018-08-17 | 东莞市力辉马达有限公司 | A kind of noise-reduction method of high-speed DC brushless electric machine |
| CN113472268A (en) * | 2021-06-04 | 2021-10-01 | 中国人民解放军海军工程大学 | High-power motor excitation device and control method |
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Open date: 20100616 |