CN101645690A - Method for dynamically adjusting voltage and device thereof - Google Patents
Method for dynamically adjusting voltage and device thereof Download PDFInfo
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- CN101645690A CN101645690A CN200910189959A CN200910189959A CN101645690A CN 101645690 A CN101645690 A CN 101645690A CN 200910189959 A CN200910189959 A CN 200910189959A CN 200910189959 A CN200910189959 A CN 200910189959A CN 101645690 A CN101645690 A CN 101645690A
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- voltage
- dynamically adjusting
- alternating current
- power factor
- transformer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Control Of Ac Motors In General (AREA)
Abstract
The invention relates to a method for dynamically adjusting voltage and a device thereof, wherein the device comprises a power factor measurement control module connected with the control end of a star-delta automatic switching device and the control end of a voltage-adjusting transformer and used for measuring the power factor of an alternating current machine. The method comprises: calculating the power factor of the machine according to measured current and voltage phase differences of the alternating current machine; and controlling the output voltage of the voltage-adjusting transformer of the input end of the alternating current machine according to the power factor. The method for dynamically adjusting voltage and the device thereof are capable of automatically adjusting voltage according to the load state of the machine so as to further save energy, improve the power factor and increase the service efficiency of a power supply system without influencing the rotating speed of the machine.
Description
Technical field
The present invention relates to alternating current machine, be specifically related to a kind of method for dynamically adjusting voltage and device thereof.
Background technology
At present, alternating current machine is in operation, when unloaded and underloading occurring, can not adjust input voltage automatically, wasted a lot of electric power and also reduced the power factor of electric power system simultaneously, it is energy-conservation that existing technology is to use frequency converter to realize, but use frequency converter, the cost height also makes to change rotating speed of motor.Produced a lot of high order harmonic components simultaneously, the stability of electric power system has been caused very big harm.
In addition, the applicant has also applied for Chinese utility model " a kind of star triangle automatic switching control equipment " and " a kind of pressure regulating energy-saving device ".
Summary of the invention
The technical issues that need to address of the present invention are, how a kind of method for dynamically adjusting voltage and device thereof are provided, can carry out voltage according to motor load weight state adjusts automatically, thereby do not influencing under the motor speed, further reaching energy-saving effect and the service efficiency of improving power factor, raising electric power system.
First technical problem of the present invention solves like this: make up a kind of method for dynamically adjusting voltage, may further comprise the steps:
1.1) calculate motor power factor according to the alternating current machine electric current of measuring, voltage phase difference;
1.2) according to the output voltage of the voltage regulating transformer of described power factor controlling alternating current machine input.
According to method for dynamically adjusting voltage provided by the invention, described alternating current machine electric current, voltage are arbitrary in-phase current, the voltage in the three-phase alternating current.
According to method for dynamically adjusting voltage provided by the invention, described step 1.2) comprises according to described power factor and be lower than the output voltage that minimum threshold reduces described voltage regulating transformer.
According to method for dynamically adjusting voltage provided by the invention, described step 1.2) comprises according to described power factor and be higher than the output voltage that high threshold promotes described voltage regulating transformer.
According to method for dynamically adjusting voltage provided by the invention, this method comprises that also carrying out the star triangle according to described power factor controlling alternating current machine star triangle automatic switching control equipment switches.
Another technical problem of the present invention solves like this: make up a kind of dynamic voltage adjustment device, the voltage regulating transformer and the star triangle automatic switching control equipment that comprise alternating current machine and connection thereof also comprise the power-factor measurement control module that connects described star triangle automatic switching control equipment control end and voltage regulating transformer control end, is used to measure the alternating current machine power factor.
According to dynamic voltage adjustment device provided by the invention, described power-factor measurement control module comprises measuring unit and the main control unit that connects successively.
According to dynamic voltage adjustment device provided by the invention, described measuring unit comprise with three-phase alternating current in the arbitrary identical voltage terminal summation current transformer that is connected.
According to dynamic voltage adjustment device provided by the invention, described star triangle automatic switching control equipment comprises star triangle diverter switch, and described power-factor measurement control module connects described star triangle diverter switch control end.
According to dynamic voltage adjustment device provided by the invention, described voltage regulating transformer is self coupling zeroing transformer, ring-shaped transformer or an EI transformer.
Method for dynamically adjusting voltage provided by the invention and device thereof, during the motor operation, the weight of load is detected by measurement module, be responsible for calculating by the MCU control module again, handover module is controlled in output, carries out the zero line tap changing of autotransformer, cooperate star triangle diverter switch, carry out the conversion of star triangle, change the mode of operation and the supply power voltage of motor, switch reliable and stable.When having solved existing empty load of motor or underloading, waste electric power, the while has also been reduced the problem of the power factor of electric power system.Do not influencing under the motor speed, further reaching energy-saving effect and improve power factor.Improve the electric power system service efficiency.
Description of drawings
Further the present invention is described in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is specific embodiment of the invention pressure regulation of the present invention and star triangle automatic switching control equipment connection layout.
Embodiment
At first, thinking of the present invention is described:
When motor moves, the weight of load constantly changes, the weight of load is detected by measurement module, be responsible for calculating by the MCU control module again, handover module is controlled in output, carries out the zero line tap changing of autotransformer, cooperates star triangle diverter switch, carry out the conversion of star triangle, change the mode of operation and the supply power voltage of motor.
When the motor light running, the signal of MCU control module output buck is given handover module, the zero line step-down is carried out in the zero line tap of autotransformer switched, show motor or underloading as measurement data, continuing step-down, still is higher as voltage, and the star triangle switches the star operation.Show that up to measurement data motor normally moves.
When the motor heavy service, the signal that MCU control module output is boosted is given handover module, and the zero line switching of boosting is carried out in the zero line tap of autotransformer, show still heavy duty of motor as measurement data, continuing to boost, still is on the low side as voltage, and the star triangle switches the triangle operation.Show that up to measurement data motor normally moves.
Show as Fig. 1, the present invention is a kind of pressure regulation and star triangle automatic switching control equipment, comprises voltage regulating transformer, comprises that the star triangle connects diverter switch, comprise the measurement module that is used to measure electric moter voltage, electric current, and be used to calculate the MCU control module of motor load state and control output.The handover module that also comprises output.
-described voltage regulating transformer, input connects civil power, and output connects the star triangle and connects diverter switch, and the zero line tap connects handover module.Weight according to load changes, and carries out the zero line tap changing.Change the motor working voltage.
-described star triangle connection diverter switch, input connects the output of voltage regulating transformer, and output connects motor load, according to the weight change of load, carries out the star triangle and switches.Change the motor operational mode.
-described measurement module is to connect current transformer and voltage terminal, described voltage terminal and alternating current machine three
Phase power supply any one is connected, described current transformer and same mutual inductance mutually.
-described handover module is to connect autotransformer zero line tap and star triangle diverter switch, according to MCU
The control module output signal is carried out zero line and star triangle and is switched.
-described MCU control module, input connects measurement module, and output connects handover module.Voltage, electric current according to the motor load end calculate, and the control handover module carries out the tap of voltage regulating transformer zero line and the star triangle switches.Change motor working voltage and pattern.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to the covering scope of the utility model claim.
Claims (10)
1, a kind of method for dynamically adjusting voltage is characterized in that, may further comprise the steps:
1.1) calculate motor power factor according to the alternating current machine electric current of measuring, voltage phase difference;
1.2) according to the output voltage of the voltage regulating transformer of described power factor controlling alternating current machine input.
According to the described method for dynamically adjusting voltage of claim 1, it is characterized in that 2, described alternating current machine electric current, voltage are arbitrary in-phase current, the voltage in the three-phase alternating current.
3, according to the described method for dynamically adjusting voltage of claim 1, it is characterized in that described step 1.2) comprise according to described power factor and be lower than the output voltage that minimum threshold reduces described voltage regulating transformer.
4, according to the described method for dynamically adjusting voltage of claim 1, it is characterized in that described step 1.2) comprise according to described power factor and be higher than the output voltage that high threshold promotes described voltage regulating transformer.
According to the described method for dynamically adjusting voltage of claim 1, it is characterized in that 5, this method comprises that also carrying out the star triangle according to described power factor controlling alternating current machine star triangle automatic switching control equipment switches.
6, a kind of dynamic voltage adjustment device, the voltage regulating transformer and the star triangle automatic switching control equipment that comprise alternating current machine and connection thereof, it is characterized in that, also comprise the power-factor measurement control module that connects described star triangle automatic switching control equipment control end and voltage regulating transformer control end, is used to measure the alternating current machine power factor.
According to the described method for dynamically adjusting voltage of claim 6, it is characterized in that 7, described power-factor measurement control module comprises measuring unit and the main control unit that connects successively.
8, according to the described method for dynamically adjusting voltage of claim 7, it is characterized in that, described measuring unit comprise with three-phase alternating current in the arbitrary identical voltage terminal summation current transformer that is connected.
According to the described method for dynamically adjusting voltage of claim 6, it is characterized in that 9, described star triangle automatic switching control equipment comprises star triangle diverter switch, described power-factor measurement control module connects described star triangle diverter switch control end.
According to the described method for dynamically adjusting voltage of claim 6, it is characterized in that 10, described voltage regulating transformer is self coupling zeroing transformer, ring-shaped transformer or an EI transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910189959A CN101645690A (en) | 2009-09-03 | 2009-09-03 | Method for dynamically adjusting voltage and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910189959A CN101645690A (en) | 2009-09-03 | 2009-09-03 | Method for dynamically adjusting voltage and device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101645690A true CN101645690A (en) | 2010-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910189959A Pending CN101645690A (en) | 2009-09-03 | 2009-09-03 | Method for dynamically adjusting voltage and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101645690A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106685306A (en) * | 2016-11-30 | 2017-05-17 | 王振铎 | Automatic energy saving system of three-phase alternating current high voltage asynchronous motor |
| CN112994549A (en) * | 2021-02-25 | 2021-06-18 | 上海交大海洋水下工程科学研究院有限公司 | Stabilizing device, method and medium for full-sea-depth ROV power supply |
-
2009
- 2009-09-03 CN CN200910189959A patent/CN101645690A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106685306A (en) * | 2016-11-30 | 2017-05-17 | 王振铎 | Automatic energy saving system of three-phase alternating current high voltage asynchronous motor |
| CN112994549A (en) * | 2021-02-25 | 2021-06-18 | 上海交大海洋水下工程科学研究院有限公司 | Stabilizing device, method and medium for full-sea-depth ROV power supply |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100210 |