CN103956950A - Fixed-frequency voltage stabilizer and control method thereof - Google Patents
Fixed-frequency voltage stabilizer and control method thereof Download PDFInfo
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- CN103956950A CN103956950A CN201410187747.2A CN201410187747A CN103956950A CN 103956950 A CN103956950 A CN 103956950A CN 201410187747 A CN201410187747 A CN 201410187747A CN 103956950 A CN103956950 A CN 103956950A
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Abstract
The invention relates to a fixed-frequency voltage stabilizer and a control method thereof. The fixed-frequency voltage stabilizer comprises an intelligent control unit. The intelligent control unit is connected with a signal detection unit, a rectifier and filter unit, an inversion voltage stabilization unit, a communication unit and a display operation unit. The signal detection unit is used for detecting various parameters of a system, the rectifier and filter unit is used for rectifying and filtering electric energy of a diesel generator set and then outputting stabilized direct current electric energy to the inversion voltage stabilization unit, the inversion voltage stabilization unit is used for inverting the direct current electric energy output by the rectifier and filter unit into alternating current electric energy with the preset frequency, and the intelligent control unit controls the rectifier and filter unit and the inversion voltage stabilization unit according to the various parameters, collected by the signal detection unit, of the system. According to the fixed-frequency voltage stabilizer and the control method of the fixed-frequency voltage stabilizer, the concept of electric energy fixed frequency is provided for the first time, and the electric energy fixed frequency technology is applied to a variable speed generator unit; the system is in a digital operation mode, and can be in communication with other devices.
Description
Technical field
The present invention relates to a kind of frequency-fixed voltage-stable device and control method thereof.
Background technology
Diesel generating set is lightweight, simple in structure with it, power density is widely used in greatly in all trades and professions, diesel generating set on market is most widely used general with three-phase alternating current diesel generating set, three-phase alternating current diesel generating set belongs to determines frequency diesel oil diesel generating set, when operation, diesel engine speed remains at 1500RPM, and generator output electric energy frequency remains at 50Hz.But this diesel generating set also exists some defects, emphasis has (1) diesel engine potential power effectively not bring into play, and causes power dissipation.In order to keep the frequency of exporting electric energy at 50Hz, running speed must be constant in 1500RPM, cause diesel generating set and unloaded or fully loadedly all at 1500RPM, move no matter be, and conventionally diesel engine can running speed at 600RPM-2200RPM, little 15%-25% when maximum power is conventionally than 2200RPM rotating speed during with a diesel engine 1500RPM.Meet Same Efficieney demand, constant speed diesel generating set price high (2) waste fuel oil: diesel generating set is when zero load, originally may operate in minimum stable engine speed, in order to keep idling frequency constant in 50Hz, have to keep rotating speed at 1500RPM, high when during 1500RPM, fuel consumption is than 600RPM.A kind of new speed changing diesel generator group can overcome the above problems, thereby gives full play to that diesel engine potential power makes that its price is cheap, no-load running can be low in lower speed fuel consumption, maintenance and repair maintenance price is low.
Although speed changing diesel generator group can have above advantage, but for load, if the electric energy of diesel generating set output is non-constant in frequency is unallowed at 50Hz, yet the above advantage of variable speed generation unit can realize, can only pass through speed change, but speed change means the frequency of the electric energy of generator output and changes, not constant in 50Hz, variable speed generation unit is wanted to realize, need a kind of fixed device frequently, the electric energy of the Frequency of generator output is adjusted and then exported for load for constant frequency 50Hz, voltage drop while simultaneously can compensating load starting, improve the output quality of power supply of generating set.
Summary of the invention
The object of the present invention is to provide a kind of electric energy of Frequency of generator output to adjust as preset frequency, then output is for load, voltage drop while simultaneously can compensating load starting, improves frequency-fixed voltage-stable device and the control method thereof of the output quality of power supply of generating set.
For achieving the above object, technical scheme of the present invention is: a kind of frequency-fixed voltage-stable device, comprise an intelligent control unit, and this intelligent control unit is connected with detecting signal unit, rectification filtering unit, inversion voltage regulation unit, communication unit and display operation unit;
Described detecting signal unit, for detection of parameters in system, comprises input voltage, input current, input power factor, incoming frequency and the voltage after rectification filtering unit rectification, electric current and frequency, voltage, power factor (PF), electric current, power after the inversion of inversion voltage regulation unit; Described detecting signal unit is also for detection of air themperature and relative humidity;
Described rectification filtering unit is for the electric energy of diesel generating set is carried out to rectification, filtering, and then the direct current energy of stable output is to inversion voltage regulation unit;
The AC energy that it is preset frequency that described inversion voltage regulation unit is used for the direct current energy inversion of rectification filtering unit output;
Parameters in the system that described intelligent control unit gathers according to described detecting signal unit, controls described rectification filtering unit and inversion voltage regulation unit, and realizes owing overvoltage, owing overfrequency and overload protection of system; When the input voltage value detecting is during lower than systemic presupposition definite value, intelligent control unit is controlled described inversion voltage regulation unit and is opened and turn-off by preset frequency, to export the AC energy of preset frequency; When the input voltage value detecting surpasses systemic presupposition definite value, intelligent control unit is controlled described inversion voltage regulation unit and is turn-offed, and stops the power supply of load;
Parameters in the system that described communication unit gathers described detecting signal unit, is transferred to described display operation unit and shows;
Described frequency-fixed voltage-stable device also comprises that one is used to whole system that the power subsystem of electric energy is provided.
In embodiments of the present invention, described frequency-fixed voltage-stable device adopts S3C44B0 processor, and configures RAM and ROM.
In embodiments of the present invention, described rectification filtering unit adopts power rectifier diode.
In embodiments of the present invention, described inversion voltage regulation unit adopts high-power IGBT, simultaneously the built-in large value capacitor that voltage drop is compensated.
In embodiments of the present invention, described detecting signal unit comprises voltage detecting transducer after current detection sensor before voltage detecting transducer before commutation inversion, commutation inversion, inversion voltage stabilizing, inversion voltage stabilizing after-current detecting sensor, direct current voltage sensor, DC current sensor, air-temperature sensor.
In embodiments of the present invention, described communication unit comprises CAN bus, and adopts MODBUS agreement and the external world to communicate.
In embodiments of the present invention, described display operation unit comprises light-emitting diode display and operation keyboard, for each parameter of whole system is inquired about and set.
The present invention also provides a kind of control method of frequency-fixed voltage-stable device, comprises the steps,
Step S1: certain frequency pressurizer is provided, comprises an intelligent control unit, this intelligent control unit is connected with detecting signal unit, rectification filtering unit, inversion voltage regulation unit, communication unit and display operation unit;
Step S2: frequency-fixed voltage-stable device powers on, and carry out system initialization;
Step S3: when detecting signal unit detects input voltage, and this input voltage and systemic presupposition definite value are compared;
Step S4: if input voltage is less than systemic presupposition definite value, described intelligent control unit is controlled unlatching and the shutoff of described inversion voltage regulation unit frequency, to export the AC energy of preset frequency; If input voltage is greater than systemic presupposition definite value, described intelligent control unit is controlled described inversion voltage regulation unit and is turn-offed, and stops load supplying.
Compared to prior art, the present invention has following beneficial effect:
1, electric energy concept frequently is surely proposed first, and electric energy surely frequently technology be applied on variable speed generation unit;
2, adopt digitlization: whole system adopts digitlization operational mode, and can communicate with miscellaneous equipment;
3, frequency input that can Adaptive change: system can be operated in 1Hz-150Hz power frequency scope can electric energy.
Accompanying drawing explanation
Fig. 1 is frequency-fixed voltage-stable device entire block diagram of the present invention.
Fig. 2 is frequency-fixed voltage-stable device connection diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is specifically described.
As shown in Figure 1-2, a kind of frequency-fixed voltage-stable device of the present invention, comprises an intelligent control unit, and this intelligent control unit is connected with detecting signal unit, rectification filtering unit, inversion voltage regulation unit, communication unit and display operation unit;
Described detecting signal unit, for detection of parameters in system, comprises input voltage, input current, input power factor, incoming frequency and the voltage after rectification filtering unit rectification, electric current and frequency, voltage, power factor (PF), electric current, power after the inversion of inversion voltage regulation unit; Described detecting signal unit is also for detection of air themperature and relative humidity;
Described rectification filtering unit is for the electric energy of diesel generating set is carried out to rectification, filtering, and then the direct current energy of stable output is to inversion voltage regulation unit;
The AC energy that it is preset frequency that described inversion voltage regulation unit is used for the direct current energy inversion of rectification filtering unit output;
Parameters in the system that described intelligent control unit gathers according to described detecting signal unit, controls described rectification filtering unit and inversion voltage regulation unit, and realizes owing overvoltage, owing overfrequency and overload protection of system; When the input voltage value detecting is during lower than systemic presupposition definite value, intelligent control unit is controlled described inversion voltage regulation unit and is opened and turn-off by preset frequency, to export the AC energy of preset frequency; When the input voltage value detecting surpasses systemic presupposition definite value, intelligent control unit is controlled described inversion voltage regulation unit and is turn-offed, and stops the power supply of load;
Parameters in the system that described communication unit gathers described detecting signal unit, is transferred to described display operation unit and shows;
Described frequency-fixed voltage-stable device also comprises that one is used to whole system that the power subsystem of electric energy is provided.
Detecting signal unit gathers input voltage, electric current, power factor (PF), the frequency of rectification filtering unit, the above-mentioned several parameter values that detect are admitted to S3C44B0 processor, processor is processed these parameters, when the magnitude of voltage detecting surpasses systemic presupposition definite value, processor sends signal to inversion voltage regulation unit, stop power supply, by voltage, electric current, power factor (PF), frequency.The owing overvoltage, owe overfrequency of system, overload are protected, by communication unit, above-mentioned parameter value is passed to host computer simultaneously, by liquid crystal display, show above parameter.
Detecting signal unit gathers frequency, power factor (PF), electric current, power, air themperature, the relative humidity of inversion voltage regulation unit output.Frequency, power factor (PF), electric current, voltage, these parameters are feedback parameter, S3C44B0 processor sends instruction, comes output electrical quantity frequency, the voltage of control inverter to keep constant.Output voltage, frequency are during with the variation of external loading, the variation of the frequency of detecting signal unit collection inversion voltage regulation unit output, power factor (PF), voltage, this running parameter is admitted in S3C44B0 processor, then processor is according to adjusting result, export corresponding control command, keep output voltage, frequency to keep constant, the power factor (PF) of output keeps higher level.
In the present embodiment, described frequency-fixed voltage-stable device adopts S3C44B0 processor, and configures RAM and ROM.
In the present embodiment, described rectification filtering unit adopts power rectifier diode.
In the present embodiment, described inversion voltage regulation unit adopts high-power IGBT, simultaneously the built-in large value capacitor that voltage drop is compensated.
In the present embodiment, described detecting signal unit comprises voltage detecting transducer after current detection sensor before voltage detecting transducer before commutation inversion, commutation inversion, inversion voltage stabilizing, inversion voltage stabilizing after-current detecting sensor, direct current voltage sensor, DC current sensor, air-temperature sensor.
In the present embodiment, described communication unit comprises CAN bus, and adopts MODBUS agreement and the external world to communicate.
In the present embodiment, described display operation unit comprises light-emitting diode display and operation keyboard, for each parameter of whole system is inquired about and set.
The present invention also provides a kind of control method of frequency-fixed voltage-stable device, comprises the steps,
Step S1: certain frequency pressurizer is provided, comprises an intelligent control unit, this intelligent control unit is connected with detecting signal unit, rectification filtering unit, inversion voltage regulation unit, communication unit and display operation unit;
Step S2: frequency-fixed voltage-stable device powers on, and carry out system initialization;
Step S3: when detecting signal unit detects input voltage, and this input voltage and systemic presupposition definite value are compared;
Step S4: if input voltage is less than systemic presupposition definite value, described intelligent control unit is controlled unlatching and the shutoff of described inversion voltage regulation unit frequency, to export the AC energy of preset frequency; If input voltage is greater than systemic presupposition definite value, described intelligent control unit is controlled described inversion voltage regulation unit and is turn-offed, and stops load supplying.
Be more than preferred embodiment of the present invention, all changes of doing according to technical solution of the present invention, when the function producing does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (8)
1. a frequency-fixed voltage-stable device, is characterized in that: comprise an intelligent control unit, this intelligent control unit is connected with detecting signal unit, rectification filtering unit, inversion voltage regulation unit, communication unit and display operation unit;
Described detecting signal unit, for detection of parameters in system, comprises input voltage, input current, input power factor, incoming frequency and the voltage after rectification filtering unit rectification, electric current and frequency, voltage, power factor (PF), electric current, power after the inversion of inversion voltage regulation unit; Described detecting signal unit is also for detection of air themperature and relative humidity;
Described rectification filtering unit is for the electric energy of diesel generating set is carried out to rectification, filtering, and then the direct current energy of stable output is to inversion voltage regulation unit;
The AC energy that it is preset frequency that described inversion voltage regulation unit is used for the direct current energy inversion of rectification filtering unit output;
Parameters in the system that described intelligent control unit gathers according to described detecting signal unit, controls described rectification filtering unit and inversion voltage regulation unit, and realizes owing overvoltage, owing overfrequency and overload protection of system; When the input voltage value detecting is during lower than systemic presupposition definite value, intelligent control unit is controlled described inversion voltage regulation unit and is opened and turn-off by preset frequency, to export the AC energy of preset frequency; When the input voltage value detecting surpasses systemic presupposition definite value, intelligent control unit is controlled described inversion voltage regulation unit and is turn-offed, and stops the power supply of load;
Parameters in the system that described communication unit gathers described detecting signal unit, is transferred to described display operation unit and shows;
Described frequency-fixed voltage-stable device also comprises that one is used to whole system that the power subsystem of electric energy is provided.
2. frequency-fixed voltage-stable device according to claim 1, is characterized in that: described frequency-fixed voltage-stable device adopts S3C44B0 processor, and configures RAM and ROM.
3. frequency-fixed voltage-stable device according to claim 1, is characterized in that: described rectification filtering unit adopts power rectifier diode.
4. frequency-fixed voltage-stable device according to claim 1, is characterized in that: described inversion voltage regulation unit adopts high-power IGBT, simultaneously the built-in large value capacitor that voltage drop is compensated.
5. frequency-fixed voltage-stable device according to claim 1, is characterized in that: described detecting signal unit comprises voltage detecting transducer after current detection sensor before voltage detecting transducer before commutation inversion, commutation inversion, inversion voltage stabilizing, inversion voltage stabilizing after-current detecting sensor, direct current voltage sensor, DC current sensor, air-temperature sensor.
6. frequency-fixed voltage-stable device according to claim 1, is characterized in that: described communication unit comprises CAN bus, and adopts MODBUS agreement and the external world to communicate.
7. frequency-fixed voltage-stable device according to claim 1, is characterized in that: described display operation unit comprises light-emitting diode display and operation keyboard, for each parameter of whole system is inquired about and set.
8. a control method for frequency-fixed voltage-stable device, is characterized in that: comprises the steps,
Step S1: certain frequency pressurizer is provided, comprises an intelligent control unit, this intelligent control unit is connected with detecting signal unit, rectification filtering unit, inversion voltage regulation unit, communication unit and display operation unit;
Step S2: frequency-fixed voltage-stable device powers on, and carry out system initialization;
Step S3: when detecting signal unit detects input voltage, and this input voltage and systemic presupposition definite value are compared;
Step S4: if input voltage is less than systemic presupposition definite value, described intelligent control unit is controlled unlatching and the shutoff of described inversion voltage regulation unit frequency, to export the AC energy of preset frequency; If input voltage is greater than systemic presupposition definite value, described intelligent control unit is controlled described inversion voltage regulation unit and is turn-offed, and stops load supplying.
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| CN201410187747.2A CN103956950A (en) | 2014-05-06 | 2014-05-06 | Fixed-frequency voltage stabilizer and control method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5225712A (en) * | 1991-02-01 | 1993-07-06 | U.S. Windpower, Inc. | Variable speed wind turbine with reduced power fluctuation and a static VAR mode of operation |
| CN202127365U (en) * | 2011-06-30 | 2012-01-25 | 臧家兵 | Stabilized voltage and stabilized frequency power supply used in frontier defence |
| CN103178727A (en) * | 2011-12-20 | 2013-06-26 | 陕西亚泰电器科技有限公司 | Intelligent direct-current stabilized power supply |
| CN203119771U (en) * | 2013-03-12 | 2013-08-07 | 温州奥大电气有限公司 | Variable-frequency drive with automatic voltage stabilization function |
-
2014
- 2014-05-06 CN CN201410187747.2A patent/CN103956950A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5225712A (en) * | 1991-02-01 | 1993-07-06 | U.S. Windpower, Inc. | Variable speed wind turbine with reduced power fluctuation and a static VAR mode of operation |
| CN202127365U (en) * | 2011-06-30 | 2012-01-25 | 臧家兵 | Stabilized voltage and stabilized frequency power supply used in frontier defence |
| CN103178727A (en) * | 2011-12-20 | 2013-06-26 | 陕西亚泰电器科技有限公司 | Intelligent direct-current stabilized power supply |
| CN203119771U (en) * | 2013-03-12 | 2013-08-07 | 温州奥大电气有限公司 | Variable-frequency drive with automatic voltage stabilization function |
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Application publication date: 20140730 |