CN115173425A - Stabilized voltage supply based on alternating current chopping - Google Patents
Stabilized voltage supply based on alternating current chopping Download PDFInfo
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- CN115173425A CN115173425A CN202210945480.3A CN202210945480A CN115173425A CN 115173425 A CN115173425 A CN 115173425A CN 202210945480 A CN202210945480 A CN 202210945480A CN 115173425 A CN115173425 A CN 115173425A
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- 238000004804 winding Methods 0.000 claims abstract description 16
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- 102100039692 RNA-binding motif, single-stranded-interacting protein 1 Human genes 0.000 claims description 15
- 102100039690 RNA-binding motif, single-stranded-interacting protein 2 Human genes 0.000 claims description 15
- 101150105073 SCR1 gene Proteins 0.000 claims description 15
- 101100134054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) NTG1 gene Proteins 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 230000002457 bidirectional effect Effects 0.000 claims description 5
- 238000011897 real-time detection Methods 0.000 claims description 3
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
- H02M5/12—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a voltage-stabilized power supply based on alternating current chopping, which is applied to the technical field of power supplies and has the technical scheme that: including AC input side and AC output side, its connection is provided with compensating transformer T1, and compensating transformer T1's primary winding is connected with AC chopping voltage regulator, including positive negative compensation switch module and IGBT alternating current chopper, IGBT alternating current chopper includes input filter and output filter, and input filter is connected with the L/N line of AC power supply, and output filter is connected with positive negative compensation switch module, and the technical effect who has is: the IGBT alternating-current chopper is added in the power supply loop and matched with the input filter and the output filter, so that the voltage input into the power supply loop can be filtered, the voltage output by the power supply loop can be filtered, the interference on a power grid and a power utilization side can be effectively avoided, the compensation transformer is connected with the positive and negative compensation switching module, and continuous stepless positive and negative compensation can be performed on the compensation transformer by controlling the working state of the positive and negative compensation switching module.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a voltage-stabilized power supply based on alternating current chopping.
Background
Along with the rapid development of economy, various high power and intensive electric equipment are more and more, and when the peak period is used in a centralized manner, the problem that the line loss is large and the voltage in the power grid is unstable due to the reduction of the transmission capacity of the line can occur in the power grid, so that the influence on the stability of production and life is caused, and various stabilized voltage power supply equipment and systems for stabilizing the voltage of the power grid are generated under the condition.
The widely applied voltage-stabilized power supply in the market at present mainly comprises: the compensating full-automatic AC voltage stabilizer has the defects of easy damage of carbon brushes, short service life, poor reliability, long dynamic response time and the like, the non-contact silicon-controlled step voltage-regulating voltage stabilizer has the defects of discontinuous output voltage, low voltage-stabilizing precision, more compensating transformers, only step regulation and the like when the voltage is stable, and in order to overcome the defects of the two AC voltage stabilizers, the development of a new generation of continuous stepless, non-contact, low-cost and high-reliability AC voltage stabilizer becomes a trend, and the clutter interference problem of the AC voltage stabilizer in the using process also needs to be overcome.
Disclosure of Invention
The invention aims to provide a voltage-stabilized power supply based on alternating current chopping, which has the advantages of high compensation precision, high response speed, capability of flexibly adjusting the compensation voltage range according to different loads, capability of avoiding pollution to a power grid, capability of outputting a pure sine wave to the loads and wide application range.
The technical purpose of the invention is realized by the following technical scheme:
stabilized voltage supply based on AC chopping, including AC input side and AC output side, be provided with between AC input side and the AC output side offset transformer T1, and respectively with offset transformer T1's secondary winding's both ends are connected, and offset transformer T1's primary winding is connected with AC chopping regulator, AC chopping regulator includes positive negative compensation switching module, and positive negative compensation switching module's output is connected with IGBT alternating current chopper, IGBT alternating current chopper includes input filter and output filter, input filter and AC power's L/N line connection, output filter with positive negative compensation switching module connects.
Through the technical scheme, the AC chopping voltage regulating device can compare the detected power grid voltage with the set voltage, when the power grid voltage is higher than or lower than the set voltage, the AC chopping voltage regulating device outputs a voltage to offset or increase the power grid voltage, so that the power grid voltage accords with the set voltage and then is input, when the input voltage is high, the positive and negative compensation switching module is adopted to conduct the negative compensation of the compensation transformer to reduce the voltage, when the input voltage is low, the positive and negative compensation switching module is adopted to conduct the positive compensation of the compensation transformer to increase the voltage, so that the voltage is stable, meanwhile, the input filter can avoid polluting the power grid when the power grid voltage is regulated, and a pure sine wave can be output when the load is output.
The invention is further configured to: the positive and negative compensation switching module comprises four bidirectional thyristors SCR1, SCR2, SCR3 and SCR4, first anodes of the SCR1 and the SCR2 are connected and connected with one end of a primary winding of the compensation transformer T1, and first anodes of the SCR3 and the SCR4 are connected and connected with the other end of the primary winding of the compensation transformer T1.
The invention is further configured to: and second anodes of the SCR1 and the SCR3 are connected with each other and with the L end of the output filter, and second anodes of the SCR2 and the SCR4 are connected with each other and with the N end of the output filter.
According to the technical scheme, when the voltage of the power grid is high, the SCR2 and the SCR3 work, the voltage output by the IGBT alternating-current chopper reaches the compensation transformer T1 and achieves reverse compensation, the voltage on the other side of the compensation transformer is reduced, the voltage of the low-voltage grid is eliminated, when the voltage of the power grid is low, the SCR1 and the SCR4 work, the voltage output by the IGBT alternating-current chopper reaches the compensation transformer T1 and achieves positive compensation, the voltage on the other side of the compensation transformer is increased, and the voltage of the power grid is increased.
The invention is further configured to: the IGBT alternating-current chopper further comprises a controller, the controller comprises a positive and negative switching control signal module, and control electrodes of the SCR1, the SCR2, the SCR3 and the SCR4 are in communication connection with the positive and negative switching control signal module.
Through the technical scheme, the controller is used for realizing on-off by changing the level inside the thyristor, and further realizing the independent control of on-off of the SCR1, the SCR2, the SCR3 and the SCR4 so as to realize positive/negative compensation on the compensating transformer T1.
The invention is further configured to: the controller further comprises a voltage sampling module and a current sampling module, wherein two connecting ends of the voltage sampling module are respectively connected with an L/N line of an AC power supply so as to realize real-time sampling of the voltage of the AC power supply.
Through the technical scheme, the controller judges whether to perform positive and negative compensation according to the power grid voltage read by the voltage sampling module.
The invention is further configured to: and a current transformer CT is connected in series between the AC input side and the AC output side, and two ends of a winding of the current transformer CT are in conduction connection with two connecting ends of the current sampling module so as to realize real-time detection of the current between the AC input side and the AC output side.
Through the technical scheme, the controller can detect the current in the circuit in real time through the current transformer for an external unit to use.
In conclusion, the invention has the following beneficial effects:
1. by adding the IGBT alternating-current chopper in the power supply loop and matching with the input filter and the output filter, the voltage of a power grid can not be polluted, and a pure sine wave can be output to a load;
2. by connecting the compensation transformer with the positive and negative compensation switching module, the positive and negative compensation of the contactless stepless voltage can be carried out on the compensation transformer by controlling the working state of the positive and negative compensation switching module.
Drawings
FIG. 1 is a schematic diagram of a regulated power supply of the present embodiment;
FIG. 2 is a schematic diagram of a regulated power supply of the present embodiment;
FIG. 3 is a schematic diagram of voltage compensation of the regulated power supply of the present embodiment;
fig. 4 is a schematic diagram of a voltage stabilizing flow of the voltage stabilizing power supply of the present embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b):
referring to fig. 1 and 2, the regulated power supply based on AC chopping includes an AC input side and an AC output side, the AC power supply is a grid power supply, a compensation transformer T1 is disposed between the AC input side and the AC output side, an L line of the AC power supply is connected to both ends of a secondary winding of the compensation transformer T1, a primary winding of the compensation transformer T1 is connected to an AC chopping voltage regulator for controlling a compensation mode of the compensation transformer T1, the AC chopping voltage regulator is composed of a positive and negative compensation switching module and an IGBT AC chopper, wherein the IGBT AC chopper includes an input filter, an output filter and a controller, the controller is configured to control a voltage regulation and a switching action of the IGBT AC chopper through a PID algorithm according to a voltage and current state of a loop, the input filter is disposed at an input end of the IGBT AC chopper, an IL end and an IN end of the input filter are respectively connected to an L/N line of the AC power supply, the output filter is disposed at an output end of the IGBT AC chopper and is connected to the positive and negative compensation switching module, the input filter can prevent the IGBT from generating interference harmonics during a process of the IGBT chopper to pollute the grid power supply, and at the same time when the IGBT outputs a compensation voltage to the positive and the negative compensation switching module, the output filter can ensure a stable sine wave form of the AC chopper.
Referring to fig. 1 and 2, the controller further includes a voltage sampling module and a current sampling module, two connection ends of the voltage sampling module are respectively connected to L/N lines of the AC power supply to implement real-time sampling of the voltage of the AC power supply, a current transformer CT is connected in series between the AC input side and the AC output side, and two ends of a winding of the current transformer CT are in conductive connection with two connection ends of the current sampling module to implement real-time detection of the current magnitude between the AC input side and the AC output side.
Referring to fig. 2, the positive and negative compensation switching module includes four bidirectional thyristors SCR1, SCR2, SCR3 and SCR4, the controller includes a positive and negative switching control signal module, 8 gates of the SCR1, SCR2, SCR3 and SCR4 are connected to 8 control signal terminals of the positive and negative switching control signal module of the controller, the controller controls the conduction state of a single thyristor in each bidirectional thyristor by controlling the output current of each control signal terminal to control the conduction and the shutdown of each bidirectional thyristor, the first anodes of the SCR1 and SCR2 are connected to one end of the primary winding of the compensation transformer T1 near the AC input side, the first anodes of the SCR3 and SCR4 are connected to one end of the primary winding of the compensation transformer T1 near the AC output side, the second anodes of the SCR1 and SCR3 are connected to one another and to the OL terminal of the output filter, and the second anodes of the SCR2 and SCR4 are connected to one another and to the ON terminal of the output filter.
Referring to fig. 2, 3 and 4, when the controller detects that the grid voltage is higher than the voltage set by the IGBT AC chopper through the voltage sampling module, the positive-negative switching control signal module applies a control current to the gates of the SCR2 and the SCR3 and turns on the SCR2 and the SCR3, the compensation voltage output by the IGBT AC chopper is processed by the output filter and then flows through the SCR3 and forms a loop with the SCR2 to perform inverse compensation on the compensation transformer T1, reduce the voltage on the side of the compensation transformer T1 close to the AC output side and realize the voltage of the low extinction network to meet the set voltage, when the grid voltage is lower than the voltage set by the IGBT AC chopper, the positive-negative switching control signal module applies a control current to the gates of the SCR1 and the SCR4 and turns on the SCR1 and the SCR4, the compensation voltage output by the IGBT AC chopper flows through the SCR1 and forms a loop with the SCR4 after being processed by the output filter to realize positive compensation on the compensation transformer T1 and increase the voltage on the AC input side of the compensation transformer T1, thereby realizing the voltage increase of the grid and making it meet the set voltage.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (6)
1. The regulated power supply based on the alternating current chopping comprises an AC input side and an AC output side, and is characterized in that a compensating transformer T1 is arranged between the AC input side and the AC output side and is respectively connected with two ends of a secondary winding of the compensating transformer T1, and a primary winding of the compensating transformer T1 is connected with an AC chopping voltage regulating device;
the AC chopping voltage regulation device comprises a positive and negative compensation switching module, the output end of the positive and negative compensation switching module is connected with an IGBT alternating current chopper, the IGBT alternating current chopper comprises an input filter and an output filter, the input filter is connected with an L/N line of an AC power supply, and the output filter is connected with the positive and negative compensation switching module.
2. The ac chopping based regulated power supply of claim 1, wherein the positive and negative compensation switching module comprises four bidirectional thyristors SCR1, SCR2, SCR3 and SCR4, the first anodes of SCR1 and SCR2 are connected with one end of the primary winding of the compensation transformer T1, and the first anodes of SCR3 and SCR4 are connected with the other end of the primary winding of the compensation transformer T1.
3. The ac chopping based regulated power supply of claim 2, wherein second anodes of said SCRs 1 and 3 are connected to each other and to the L terminal of said output filter, and second anodes of said SCRs 2 and 4 are connected to each other and to the N terminal of said output filter.
4. The ac chopping based regulated power supply of claim 2, wherein the IGBT ac chopper further comprises a controller comprising a positive and negative switching control signal module, the control poles of the SCRs 1, 2, 3 and 4 being communicatively connected to the positive and negative switching control signal module.
5. The regulated power supply based on alternating current chopping of claim 4, wherein the controller further comprises a voltage sampling module and a current sampling module, and two connection ends of the voltage sampling module are respectively connected with an L/N line of an AC power supply so as to realize real-time sampling of the voltage of the AC power supply.
6. The alternating current chopping-based voltage-stabilized power supply according to claim 5, wherein a current transformer CT is connected in series between the AC input side and the AC output side, and two ends of a winding of the current transformer CT are in conductive connection with two connection ends of the current sampling module, so as to realize real-time detection of the current magnitude between the AC input side and the AC output side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210945480.3A CN115173425A (en) | 2022-08-08 | 2022-08-08 | Stabilized voltage supply based on alternating current chopping |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210945480.3A CN115173425A (en) | 2022-08-08 | 2022-08-08 | Stabilized voltage supply based on alternating current chopping |
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| CN115173425A true CN115173425A (en) | 2022-10-11 |
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| CN202210945480.3A Pending CN115173425A (en) | 2022-08-08 | 2022-08-08 | Stabilized voltage supply based on alternating current chopping |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184337A (en) * | 2014-08-30 | 2014-12-03 | 龚秋声 | Alternating current stabilized voltage supply for adjusting compensating voltages through alternating current chopped waves in two-way mode |
| CN204190624U (en) * | 2014-08-10 | 2015-03-04 | 龚秋声 | Alternating-current chopper circuit regulates the AC voltage regulator of bucking voltage |
| CN204205962U (en) * | 2014-08-10 | 2015-03-11 | 龚秋声 | Single-phase and three-phase alternating current chopper circuit regulates the AC voltage regulator of bucking voltage |
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2022
- 2022-08-08 CN CN202210945480.3A patent/CN115173425A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204190624U (en) * | 2014-08-10 | 2015-03-04 | 龚秋声 | Alternating-current chopper circuit regulates the AC voltage regulator of bucking voltage |
| CN204205962U (en) * | 2014-08-10 | 2015-03-11 | 龚秋声 | Single-phase and three-phase alternating current chopper circuit regulates the AC voltage regulator of bucking voltage |
| CN104184337A (en) * | 2014-08-30 | 2014-12-03 | 龚秋声 | Alternating current stabilized voltage supply for adjusting compensating voltages through alternating current chopped waves in two-way mode |
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Application publication date: 20221011 |