CN112994548A - Transformer voltage regulating device based on power electronic technology - Google Patents
Transformer voltage regulating device based on power electronic technology Download PDFInfo
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- CN112994548A CN112994548A CN202110111610.9A CN202110111610A CN112994548A CN 112994548 A CN112994548 A CN 112994548A CN 202110111610 A CN202110111610 A CN 202110111610A CN 112994548 A CN112994548 A CN 112994548A
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 47
- 238000005516 engineering process Methods 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000001360 synchronised effect Effects 0.000 claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000007935 neutral effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
- H02P13/06—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings
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Abstract
The invention discloses a transformer voltage regulating device based on a power electronic technology, wherein a live wire input end L _ IN of a voltage regulating coil IN a voltage regulating transformer T1 is respectively connected with an input end of a power transformer, an input end of a rectifying circuit and an input end of a synchronous detection circuit, the rectifying circuit is respectively connected with two ends of a secondary coil IN a voltage regulating transformer T1 through a driving circuit, a live wire output end L _ OUT of the voltage regulating coil IN the voltage regulating transformer T1 is connected with an input end of a feedback circuit, an output end of the synchronous detection circuit and an output end of the feedback circuit are respectively connected to an input end of a single chip microcomputer, and a pulse signal output by the single. The pressure regulating device is simple in structure and reasonable in design, the service life of the pressure regulating device is effectively prolonged, and meanwhile, stepless pressure regulation and voltage stabilization regulation can be realized by the pressure regulating device.
Description
Technical Field
The invention belongs to the technical field of voltage regulating devices, and particularly relates to a transformer voltage regulating device based on a power electronic technology.
Background
In the existing transformer voltage regulation technology, voltage regulation is mainly realized by changing tap positions of transformer tap windings, namely, changing a voltage ratio, and tap switches are generally adopted to switch the transformer tap, and the main defects of the technology are as follows: 1. the service life is short, and the failure rate is high; 2. the circuit and the transformer have complex processes; 3. the pressure regulating precision is low, and stepless regulation cannot be realized; 4. the voltage unbalance rate cannot be adjusted.
Disclosure of Invention
The invention provides a transformer voltage regulating device based on power electronic technology, which can simplify the manufacturing process of a voltage regulator and prolong the service life of the voltage regulator for overcoming the defects of the prior art.
The invention adopts the following technical scheme for solving the technical problems, and the transformer voltage regulating device based on the power electronic technology comprises a voltage regulating transformer T1 and is characterized in that: the live wire input end L _ IN of the voltage regulating coil IN the voltage regulating transformer T1 is respectively connected with the input end of the power transformer, the input end of the rectifying circuit and the input end of the synchronous detection circuit, the rectifying circuit is respectively connected with the two ends of the secondary coil IN the voltage regulating transformer T1 through the driving circuit, the live wire output end L _ OUT of the voltage regulating coil IN the voltage regulating transformer T1 is connected with the input end of the feedback circuit, the output end of the synchronous detection circuit and the output end of the feedback circuit are respectively connected to the input end of the single chip microcomputer, and the pulse signal output by the single.
Further limiting, an alternating current input end of a bridge rectifier D1 IN the rectifier circuit is respectively connected with a live wire input end L _ IN and a zero line input end N, a direct current positive end of a rectifier D1 is respectively connected with a positive electrode of a capacitor C1, a collector of an IGBT power module Q1 IN the drive circuit and a collector of an IGBT power module Q3, a direct current negative end of a rectifier D1 is respectively connected with a negative electrode of a capacitor C1, an emitter of an IGBT power module Q2 IN the drive circuit and an emitter of an IGBT power module Q4, an emitter of an IGBT power module Q1 IN the drive circuit and a collector of an IGBT power module Q2 are respectively connected with one end of a secondary coil IN a voltage regulating transformer T1, and an emitter of an IGBT power module Q3 IN the drive circuit and a collector of an IGBT power module Q4 are respectively.
Further, the synchronous detection circuit comprises a voltage transformer T2 and a comparator U1B, wherein one end of a primary coil IN the voltage transformer T2 is connected with the input end N of the zero line through a resistor R1, the other end of the primary coil IN the voltage transformer T2 is connected with the input end L _ IN of the live line through a resistor R2, one end of a secondary coil IN the voltage transformer T2 is connected with the inverting input end of the comparator U1B through a resistor R3, and the other end of the secondary coil IN the voltage transformer T2 is connected with the non-inverting input end of the comparator U1B through a resistor R4.
Further, the feedback circuit comprises a voltage transformer T3 and a comparator U2B, wherein one end of a primary coil in the voltage transformer T3 is connected with the live wire output end L _ OUT through a resistor R5, the other end of the primary coil in the voltage transformer T3 is connected with the neutral wire input end N through a resistor R6, one end of a secondary coil in the voltage transformer T3 is connected with the inverting input end of the comparator U2B through a resistor R7, and the other end of the secondary coil in the voltage transformer T3 is connected with the non-inverting input end of the comparator U2B through a resistor R8.
Further limiting, the output end of the comparator U1B in the synchronous detection circuit and the output end of the comparator U2B in the feedback circuit are respectively connected with the input end of the single-chip MPU, a timer is arranged on the single-chip MPU, and the output ends of the single-chip MPU are respectively connected with the gate electrodes of the IGBT power module Q1, the IGBT power module Q2, the IGBT power module Q3 and the IGBT power module Q4 in the driving circuit.
Compared with the prior art, the invention has the following beneficial effects: the pressure regulating device is simple in structure and reasonable in design, the service life of the pressure regulating device is effectively prolonged, and meanwhile, stepless pressure regulation and voltage stabilization regulation can be realized by the pressure regulating device.
Drawings
FIG. 1 is a block diagram of the circuit of the present invention;
fig. 2 is a circuit schematic of the present invention.
Detailed Description
The technical solution of the present invention is described in detail with reference to the accompanying drawings, as shown in fig. 1-2, a transformer voltage regulating device based on power electronic technology includes a voltage regulating transformer T1, and is characterized in that: the live wire input end L _ IN of the voltage regulating coil IN the voltage regulating transformer T1 is respectively connected with the input end of the power transformer, the input end of the rectifying circuit and the input end of the synchronous detection circuit, the rectifying circuit is respectively connected with the two ends of the secondary coil IN the voltage regulating transformer T1 through the driving circuit, the live wire output end L _ OUT of the voltage regulating coil IN the voltage regulating transformer T1 is connected with the input end of the feedback circuit, the output end of the synchronous detection circuit and the output end of the feedback circuit are respectively connected to the input end of the single chip microcomputer, and the pulse signal output by the single.
The alternating current input end of a bridge rectifier D1 IN the rectifying circuit is respectively connected with a live wire input end L _ IN and a zero line input end N, the direct current positive end of a rectifier D1 is respectively connected with the positive electrode of a capacitor C1, the collector electrode of an IGBT power module Q1 IN a driving circuit and the collector electrode of an IGBT power module Q3, the direct current negative end of a rectifier D1 is respectively connected with the negative electrode of a capacitor C1, the emitter electrode of an IGBT power module Q2 IN the driving circuit and the emitter electrode of an IGBT power module Q4, the emitter electrode of an IGBT power module Q1 IN the driving circuit and the collector electrode of an IGBT power module Q2 are respectively connected with one end of a secondary coil IN a voltage regulating transformer T1, and the emitter electrode of an IGBT power module Q3 IN the driving circuit and the collector electrode of the IGBT power.
The synchronous detection circuit comprises a voltage transformer T2 and a comparator U1B, wherein one end of a primary coil IN the voltage transformer T2 is connected with a zero line input end N through a resistor R1, the other end of the primary coil IN the voltage transformer T2 is connected with a live line input end L _ IN through a resistor R2, one end of a secondary coil IN the voltage transformer T2 is connected with an inverted input end of the comparator U1B through a resistor R3, and the other end of the secondary coil IN the voltage transformer T2 is connected with an IN-phase input end of the comparator U1B through a resistor R4.
The feedback circuit comprises a voltage transformer T3 and a comparator U2B, wherein one end of a primary coil in the voltage transformer T3 is connected with a live wire output end L _ OUT through a resistor R5, the other end of the primary coil in the voltage transformer T3 is connected with a zero line input end N through a resistor R6, one end of a secondary coil in the voltage transformer T3 is connected with an inverted input end of the comparator U2B through a resistor R7, and the other end of the secondary coil in the voltage transformer T3 is connected with an in-phase input end of the comparator U2B through a resistor R8.
The output end of a comparator U1B in the synchronous detection circuit and the output end of a comparator U2B in the feedback circuit are respectively connected with the input end of a single-chip microcomputer MPU, a timer is arranged on the single-chip microcomputer MPU, and the output end of the single-chip microcomputer MPU is respectively connected with gate poles of an IGBT power module Q1, an IGBT power module Q2, an IGBT power module Q3 and an IGBT power module Q4 in the driving circuit.
The invention sends a series of narrow pulses according to the sine wave rule by the singlechip, so that the area of the sent narrow pulses is equal to the area of each section of corresponding sine wave, namely equivalent impulse is sent, the width of each narrow pulse is controlled according to the sine wave rule according to the impulse equivalent theory, the amplitude of the generated sine wave can be adjusted, the output voltage of the power transformer is adjusted by sensing the output end of the regulating transformer, the purpose of boosting or reducing voltage is achieved by changing the phase, and the purpose of adjusting the boosting and reducing voltage amplitude value is achieved by changing the size of the output voltage.
The invention is provided with a singlechip, the singlechip is provided with a timer, the output voltage is regulated by using a method of controlling the pulse width by the timer, and the singlechip timer generally has higher resolution, so stepless voltage regulation can be realized by adopting the technology.
The synchronous detection circuit is arranged in the invention, and the synchronous detection circuit is used for sampling signals, and the sent sine wave and the waveform of the power transformer are strictly controlled to be in the same direction or opposite directions, so that the device only has the function of boosting or reducing voltage, and harmonic waves are not generated.
The invention is used in a three-phase four-wire system power system, each phase voltage can be respectively regulated, but not three phases are regulated simultaneously, so that the three-phase voltages can be controlled within a certain range, and the aim of controlling three-phase balance is fulfilled.
The invention changes the output voltage of the voltage regulating transformer by changing the size of the output signal rather than the connection mode of the transformer winding, and the service life of the voltage regulating transformer is prolonged because no mechanical contact is arranged and no electric arc is generated, and the manufacturing process of the transformer can be greatly simplified because only one group of excitation winding is needed.
While there have been shown and described what are at present considered the fundamental principles of the invention, its essential features and advantages, the invention further resides in various changes and modifications which fall within the scope of the invention as claimed.
Claims (5)
1. Transformer regulator based on power electronic technology, including regulating transformer T1, its characterized in that: the live wire input end L _ IN of the voltage regulating coil IN the voltage regulating transformer T1 is respectively connected with the input end of the power transformer, the input end of the rectifying circuit and the input end of the synchronous detection circuit, the rectifying circuit is respectively connected with the two ends of the secondary coil IN the voltage regulating transformer T1 through the driving circuit, the live wire output end L _ OUT of the voltage regulating coil IN the voltage regulating transformer T1 is connected with the input end of the feedback circuit, the output end of the synchronous detection circuit and the output end of the feedback circuit are respectively connected to the input end of the single chip microcomputer, and the pulse signal output by the single.
2. Transformer regulator based on power electronic technology, its characterized in that: an alternating current input end of a bridge rectifier D1 IN the rectifying circuit is respectively connected with a live wire input end L _ IN and a zero line input end N, a direct current positive end of a rectifier D1 is respectively connected with a positive electrode of a capacitor C1, a collector of an IGBT power module Q1 IN the driving circuit and a collector of an IGBT power module Q5394, a direct current negative end of a rectifier D1 is respectively connected with a negative electrode of a capacitor C1, an emitter of an IGBT power module Q2 IN the driving circuit and an emitter of an IGBT power module Q4, an emitter of an IGBT power module Q1 IN the driving circuit and a collector of an IGBT power module Q2 are respectively connected with one end of a secondary coil IN a regulating transformer T1, and an emitter of an IGBT power module Q3 IN the driving circuit and a collector of an IGBT power module Q4 IN the.
3. Transformer regulator based on power electronic technology, its characterized in that: the synchronous detection circuit comprises a voltage transformer T2 and a comparator U1B, wherein one end of a primary coil IN the voltage transformer T2 is connected with a zero line input end N through a resistor R1, the other end of the primary coil IN the voltage transformer T2 is connected with a live line input end L _ IN through a resistor R2, one end of a secondary coil IN the voltage transformer T2 is connected with an opposite phase input end of the comparator U1B through a resistor R3, and the other end of the secondary coil IN the voltage transformer T2 is connected with an IN-phase input end of the comparator U1B through a resistor R4.
4. Transformer regulator based on power electronic technology, its characterized in that: the feedback circuit comprises a voltage transformer T3 and a comparator U2B, wherein one end of a primary coil in the voltage transformer T3 is connected with a live wire output end L _ OUT through a resistor R5, the other end of the primary coil in the voltage transformer T3 is connected with a zero line input end N through a resistor R6, one end of a secondary coil in the voltage transformer T3 is connected with an opposite phase input end of the comparator U2B through a resistor R7, and the other end of the secondary coil in the voltage transformer T3 is connected with an in-phase input end of the comparator U2B through a resistor R8.
5. Transformer regulator based on power electronic technology, its characterized in that: the output end of a comparator U1B in the synchronous detection circuit and the output end of a comparator U2B in the feedback circuit are respectively connected with the input end of a single-chip microcomputer MPU, a timer is arranged on the single-chip microcomputer MPU, and the output end of the single-chip microcomputer MPU is respectively connected with an IGBT power module Q1, an IGBT power module Q2, an IGBT power module Q3 and an IGBT power module Q4 gate pole in the driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110111610.9A CN112994548A (en) | 2021-01-27 | 2021-01-27 | Transformer voltage regulating device based on power electronic technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110111610.9A CN112994548A (en) | 2021-01-27 | 2021-01-27 | Transformer voltage regulating device based on power electronic technology |
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| CN112994548A true CN112994548A (en) | 2021-06-18 |
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| CN202110111610.9A Pending CN112994548A (en) | 2021-01-27 | 2021-01-27 | Transformer voltage regulating device based on power electronic technology |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2600515A1 (en) * | 2011-09-01 | 2013-06-05 | Rolls-Royce plc | Ac electrical power regulatory system |
| CN105334898A (en) * | 2015-11-30 | 2016-02-17 | 丁婕 | Voltage regulation control circuit in alternating current stabilizer |
| CN206099832U (en) * | 2016-09-23 | 2017-04-12 | 国网江苏省电力公司南京供电公司 | Multistage on -load voltage regulation distribution transformer |
| CN208862777U (en) * | 2018-08-20 | 2019-05-14 | 江阴市艾迪电器科技有限公司 | Industrial energy saving control system |
| CN211481183U (en) * | 2020-03-23 | 2020-09-11 | 浙江科热电气有限公司 | High-power supply silicon controlled rectifier combined voltage regulator |
-
2021
- 2021-01-27 CN CN202110111610.9A patent/CN112994548A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2600515A1 (en) * | 2011-09-01 | 2013-06-05 | Rolls-Royce plc | Ac electrical power regulatory system |
| CN105334898A (en) * | 2015-11-30 | 2016-02-17 | 丁婕 | Voltage regulation control circuit in alternating current stabilizer |
| CN206099832U (en) * | 2016-09-23 | 2017-04-12 | 国网江苏省电力公司南京供电公司 | Multistage on -load voltage regulation distribution transformer |
| CN208862777U (en) * | 2018-08-20 | 2019-05-14 | 江阴市艾迪电器科技有限公司 | Industrial energy saving control system |
| CN211481183U (en) * | 2020-03-23 | 2020-09-11 | 浙江科热电气有限公司 | High-power supply silicon controlled rectifier combined voltage regulator |
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Application publication date: 20210618 |