CN105322547A - Device and method for synchronously connecting three-phase alternating current to single-phase alternating current in parallel - Google Patents
Device and method for synchronously connecting three-phase alternating current to single-phase alternating current in parallel Download PDFInfo
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- CN105322547A CN105322547A CN201410315621.9A CN201410315621A CN105322547A CN 105322547 A CN105322547 A CN 105322547A CN 201410315621 A CN201410315621 A CN 201410315621A CN 105322547 A CN105322547 A CN 105322547A
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Abstract
The invention discloses a device and method for synchronously connecting a three-phase alternating current to a single-phase alternating current in parallel. The device for synchronously connecting the three-phase alternating current to the single-phase alternating current in parallel comprises a first CPU unit, a charging unit and an inverter unit. The first CPU unit is connected with the charging unit; the charging unit is connected with a power grid or a power generator; and the inverter unit is connected with the output end of the charging unit. The inverter unit comprises a second CPU unit, a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a first inverter, a second inverter, a third inverter, a first ring transformer, a second ring transformer and a third ring transformer. Through the technology of combining the three paths to one path, the single-channel power supply power is allowed to reach up to 300% of the rated phase power.
Description
Technical field
The invention belongs to for electrical domain, be specifically related to a kind of Apparatus and method for three-phase alternating current being synchronously parallel to single-phase alternating current.
Background technology
Current is balance from the load of the three-phase alternating current that electrical network is assigned to user family or common generating equipment sends, but the loading demand of the actual every phase of user is unbalanced.
The three-phase alternating current that generating equipment sends by prior art forms direct current by switching process and charges a battery.After treating that storage battery is full of electricity, disconnect generating equipment, storage battery by inverter by DC inverter be three-phase alternating current to customer power supply, every phase output power is the every phase input power of inverter.
The shortcoming of prior art is: when the actual loading demand of user to a certain phase exceedes common contravariant equipment single phase power supply power, utilize common contravariant equipment can not meet the loading demand of user.Also have a kind of scheme to be that three-phase alternating current generating equipment sent is charged a battery by switching process formation direct current at present, and give customer power supply simultaneously.After treating that storage battery is full of electricity, disconnect generating equipment, DC inverter is that three-phase alternating current is to customer power supply by three inverters by storage battery, because the peak power output of each inverter equals three-phase alternating current electrical power sum, although so be by arbitrary output mutually the overload demand that 300% this scheme ordinary inverter can meet user to the maximum, the cost of inverter is too high.Also there is the problem of " low load with strong power ".
Summary of the invention
The present invention is directed to the problems referred to above, a kind of Apparatus and method for three-phase alternating current being synchronously parallel to single-phase alternating current is provided.
According to an aspect of the present invention, provide a kind of equipment three-phase alternating current being synchronously parallel to single-phase alternating current, comprise the first CPU element, charhing unit and inversion unit; Described first CPU element connects described charhing unit; Described charhing unit connects electrical network or generator; Described inversion unit connects described charhing unit output; Described inversion unit comprises the second CPU element, the first switch, second switch, the 3rd switch, the 4th switch, the 5th switch, the 6th switch, the 7th switch, the 8th switch, the 9th switch, the tenth switch, the 11 switch, the first inverter, the second inverter, the 3rd inverter, first ring shape transformer, the second toroidal transformer and the 3rd toroidal transformer; Described first switch connects second switch, and between the output head anode being connected across described charhing unit and negative pole; Described 4th switch connects the 5th switch, and between the output head anode being connected across described charhing unit and negative pole; Described 7th switch connects the 8th switch, and between the output head anode being connected across described charhing unit and negative pole; Described first inverter input terminal is connected between the first switch and second switch, and output connects first ring shape transformer; Described second inverter input terminal is connected between the 4th switch and the 5th switch, and output connects the second toroidal transformer; Described 3rd inverter input terminal is connected between the 7th switch and the 8th switch, and output connects the second toroidal transformer; Described first ring shape transformer output connects the 3rd switch; Described second toroidal transformer output connects the 6th switch; Described 3rd toroidal transformer output connects the 9th switch; Described tenth switch is connected across between first ring shape transformer output and the second toroidal transformer output; Described 11 switch is connected across between the second toroidal transformer output and the 3rd toroidal transformer output; Described second CPU element connects the first inverter, the second inverter and the 3rd inverter respectively.
Further, described second CPU element is the second CPU element controlling the first inverter, the second inverter and the 3rd inverter.
Further, described 3rd switch, the 6th switch and the 9th switch are respectively the 3rd switch of automatic safety switch, the 6th switch and the 9th switch.
According to another aspect of the invention, provide a kind of method three-phase alternating current being synchronously parallel to single-phase alternating current, comprise the following steps:
S1, the three-phase alternating current that generating equipment sends forms direct current by switching process and charges a battery, and after treating that storage battery is full of electricity, disconnects generating equipment;
S2, when user selects to be powered by a road, described second CPU element starts single-phase alternating current program, storage battery by the time synchronized of three inverter output single-phase alternating currents, between there is no phase deviation, form R, R ' and R " three road single-phase alternating currents;
S3, three road single-phase alternating currents, respectively through after transformer boost, form single-phase alternating current and export;
S4, by often installing independent switch on the way, can realize two-way or the parallel connection of three tunnels, a road is exporting power supply, makes single service power be up to the specified phase power of 300%;
S5, when user power utilization demand is less, disconnects another two-way, and only a closed road powers; This road is equipped with a toroidal transformer; If now temporary needs relatively high power electric energy, the two-way of disconnection can be closed again, and repeat the above-mentioned three synchronous parallel operation operational modes in tunnel;
S6, when needs charge the battery again, starter-generator again, utilizes three-phase current to export rectification and charges the battery.
Advantage of the present invention:
1., owing to have employed the less inverter of power output, reduce the material cost of equipment.
2. when user power utilization demand is less, can breaking part circuit, with decreasing unload loss, reach energy-conservation effect.
3., by three tunnels are merged into a road technique, single service power can be made to be up to the specified phase power of 300%.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.
Fig. 1 is a kind of device structure block diagram three-phase alternating current being synchronously parallel to single-phase alternating current of the present invention;
Fig. 2 is a kind of equipment inversion unit schematic diagram three-phase alternating current being synchronously parallel to single-phase alternating current of the present invention;
Fig. 3 is a kind of method flow diagram three-phase alternating current being synchronously parallel to single-phase alternating current of the present invention.
Accompanying drawing illustrates:
K1 is the first switch, K2 is second switch, K3 is the 3rd switch, K4 is the 4th switch, K5 is the 5th switch, K6 is the 6th switch, K7 is the 7th switch, K8 is the 8th switch, K9 is the 9th switch, K10 is the tenth switch, K11 is the 11 switch, G1 is the first inverter, G2 is the second inverter, G3 is the 3rd inverter, T1 is first ring shape transformer, T2 be the second toroidal transformer and T3 is the 3rd toroidal transformer.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1
Referring to figs. 1 to Fig. 2, a kind of equipment three-phase alternating current being synchronously parallel to single-phase alternating current as shown in Figure 1 to Figure 2, comprises the first CPU element, charhing unit and inversion unit; Described first CPU element connects described charhing unit; Described charhing unit connects electrical network or generator; Described inversion unit connects described charhing unit output; Described inversion unit comprises the second CPU element, the first K switch 1, second switch K2, the 3rd K switch 3, the 4th K switch 4, the 5th K switch 5, the 6th K switch 6, the 7th K switch 7, the 8th K switch 8, the 9th K switch 9, the tenth K switch the 10, the 11 K switch 11, first inverter G1, the second inverter G2, the 3rd inverter G3, first ring shape transformer T1, the second toroidal transformer T2 and the 3rd toroidal transformer T3; Described first K switch 1 connects second switch K2, and between the output head anode being connected across described charhing unit and negative pole; Described 4th K switch 4 connects the 5th K switch 5, and between the output head anode being connected across described charhing unit and negative pole; Described 7th K switch 7 connects the 8th K switch 8, and between the output head anode being connected across described charhing unit and negative pole; Described first inverter G1 input is connected between the first K switch 1 and second switch K2, and output connects first ring shape transformer T1; Described second inverter G2 input is connected between the 4th K switch 4 and the 5th K switch 5, and output connects the second toroidal transformer T2; Described 3rd inverter G3 input is connected between the 7th K switch 7 and the 8th K switch 8, and output connects the second toroidal transformer T3; Described first ring shape transformer T1 output connects the 3rd K switch 3; Described second toroidal transformer T2 output connects the 6th K switch 6; Described 3rd toroidal transformer T3 output connects the 9th K switch 9; Described tenth K switch 10 is connected across between first ring shape transformer T1 output and the second toroidal transformer T2 output; Described 11 K switch 11 is connected across between the second toroidal transformer T2 output and the 3rd toroidal transformer T3 output; Described second CPU element connects the first inverter G1, the second inverter G2 and the 3rd inverter G3 respectively.
When charge in batteries is to the capacity of specifying, the first CPU element is given and is sent out a charhing unit signal, stop charging, and automatic seamless is switched to battery inversion exports to customer power supply.User can need three-phase alternating current or single-phase alternating current from main separation.Current, the domestic consumer of 95% is actual, and what use is all single-phase alternating current, only has special industrial equipment just can use three-phase alternating current.Therefore, set three-phase alternating current in the second CPU element to power and single-phase alternating current is powered two programs.When user selects three-phase alternating current to power, then the second CPU element starts three-phase alternating current program, the time irreversibility of three inverter output single-phase alternating currents, between be mutually the phase deviation of 120 degree, then, after transformer boost, three-phase alternating current is formed to customer power supply.Every phase output power is each inverter input power.
When battery discharge is to the depth of discharge of specifying, first CPU element sends initiating signal, generator starting is charged the battery or is charged the battery by electrical network, output voltage is through transformer pressure-reducing, then by charge controller rectifying bridge type circuit by AC rectification to direct current, charge the battery.This circuit is equipped with a PWM switch, compared with traditional silicon controlled rectifier, has volume little, easily carries out block combiner, and serviceability is good, the advantages such as easy maintenance.Simultaneously in order to ensure user's not power-off, generator gives customer power supply simultaneously.
Described second CPU element is the second CPU element controlling the first inverter G1, the second inverter G2 and the 3rd inverter G3.
Described 3rd K switch 3, the 6th K switch 6 and the 9th K switch 9 are respectively the 3rd K switch 3 of automatic safety switch, the 6th K switch 6 and the 9th K switch 9.
Embodiment 2
Fig. 3 shows a kind of method flow diagram three-phase alternating current being synchronously parallel to single-phase alternating current of the present invention.
With reference to figure 3, a kind of method three-phase alternating current being synchronously parallel to single-phase alternating current as shown in Figure 3, comprises the following steps:
S1, the three-phase alternating current that generating equipment sends forms direct current by switching process and charges a battery, and after treating that storage battery is full of electricity, disconnects generating equipment;
S2, when user selects to be powered by a road, described second CPU element starts single-phase alternating current program, storage battery by the time synchronized of three inverter output single-phase alternating currents, between there is no phase deviation, form R, R ' and R " three road single-phase alternating currents;
S3, three road single-phase alternating currents, respectively through after transformer boost, form single-phase alternating current and export;
S4, by often installing independent switch on the way, can realize two-way or the parallel connection of three tunnels, a road is exporting power supply, makes single service power be up to the specified phase power of 300%;
S5, when user power utilization demand is less, disconnects another two-way, and only a closed road powers; This road is equipped with a toroidal transformer; If now temporary needs relatively high power electric energy, the two-way of disconnection can be closed again, and repeat the above-mentioned three synchronous parallel operation operational modes in tunnel;
S6, when needs charge the battery again, starter-generator again, utilizes three-phase current to export rectification and charges the battery.
The present invention, owing to have employed the less inverter of power output, reduces the material cost of equipment; When user power utilization demand is less, can breaking part circuit, with decreasing unload loss, reach energy-conservation effect; By three tunnels are merged into a road technique, single service power can be made to be up to the specified phase power of 300%.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. three-phase alternating current is synchronously parallel to an equipment for single-phase alternating current, comprises the first CPU element, charhing unit and inversion unit; Described first CPU element connects described charhing unit; Described charhing unit connects electrical network or generator; Described inversion unit connects described charhing unit output; It is characterized in that, described inversion unit comprises the second CPU element, the first K switch 1, second switch K2, the 3rd K switch 3, the 4th K switch 4, the 5th K switch 5, the 6th K switch 6, the 7th K switch 7, the 8th K switch 8, the 9th K switch 9, the tenth K switch the 10, the 11 K switch 11, first inverter G1, the second inverter G2, the 3rd inverter G3, first ring shape transformer T1, the second toroidal transformer T2 and the 3rd toroidal transformer T3; Described first K switch 1 connects second switch K2, and between the output head anode being connected across described charhing unit and negative pole; Described 4th K switch 4 connects the 5th K switch 5, and between the output head anode being connected across described charhing unit and negative pole; Described 7th K switch 7 connects the 8th K switch 8, and between the output head anode being connected across described charhing unit and negative pole; Described first inverter G1 input is connected between the first K switch 1 and second switch K2, and output connects first ring shape transformer T1; Described second inverter G2 input is connected between the 4th K switch 4 and the 5th K switch 5, and output connects the second toroidal transformer T2; Described 3rd inverter G3 input is connected between the 7th K switch 7 and the 8th K switch 8, and output connects the second toroidal transformer T3; Described first ring shape transformer T1 output connects the 3rd K switch 3; Described second toroidal transformer T2 output connects the 6th K switch 6; Described 3rd toroidal transformer T3 output connects the 9th K switch 9; Described tenth K switch 10 is connected across between first ring shape transformer T1 output and the second toroidal transformer T2 output; Described 11 K switch 11 is connected across between the second toroidal transformer T2 output and the 3rd toroidal transformer T3 output; Described second CPU element connects the first inverter G1, the second inverter G2 and the 3rd inverter G3 respectively.
2. the second CPU element according to claim 1 is the second CPU element controlling the first inverter G1, the second inverter G2 and the 3rd inverter G3.
3. the 3rd K switch 3 according to claim 1, the 6th K switch 6 and the 9th K switch 9 are respectively the 3rd K switch 3 of automatic safety switch, the 6th K switch 6 and the 9th K switch 9.
4. three-phase alternating current is synchronously parallel to a method for single-phase alternating current, it is characterized in that, comprise the following steps:
S1, the three-phase alternating current that generating equipment sends forms direct current by switching process and charges a battery, and after treating that storage battery is full of electricity, disconnects generating equipment;
S2, when user selects to be powered by a road, described second CPU element starts single-phase alternating current program, storage battery by the time synchronized of three inverter output single-phase alternating currents, between there is no phase deviation, form R, R ' and R " three road single-phase alternating currents;
S3, three road single-phase alternating currents, respectively through after transformer boost, form single-phase alternating current and export;
S4, by often installing independent switch on the way, can realize two-way or the parallel connection of three tunnels, a road is exporting power supply, makes single service power be up to the specified phase power of 300%;
S5, when user power utilization demand is less, disconnects another two-way, and only a closed road powers; This road is equipped with a toroidal transformer; If now temporary needs relatively high power electric energy, the two-way of disconnection can be closed again, and repeat the above-mentioned three synchronous parallel operation operational modes in tunnel;
S6, when needs charge the battery again, starter-generator again, utilizes three-phase current to export rectification and charges the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410315621.9A CN105322547A (en) | 2014-06-27 | 2014-06-27 | Device and method for synchronously connecting three-phase alternating current to single-phase alternating current in parallel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410315621.9A CN105322547A (en) | 2014-06-27 | 2014-06-27 | Device and method for synchronously connecting three-phase alternating current to single-phase alternating current in parallel |
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| CN105322547A true CN105322547A (en) | 2016-02-10 |
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| CN201410315621.9A Pending CN105322547A (en) | 2014-06-27 | 2014-06-27 | Device and method for synchronously connecting three-phase alternating current to single-phase alternating current in parallel |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2785231Y (en) * | 2005-02-24 | 2006-05-31 | 朱跃钢 | High voltage large-capacity continuous power supply equipment |
| JP3992652B2 (en) * | 2003-06-23 | 2007-10-17 | レシップ株式会社 | 3-phase input charger |
| CN103346675A (en) * | 2013-07-11 | 2013-10-09 | 北京工业大学 | High-power cascading electromagnetic emitter system with voltage continuously adjustable in wide range |
| CN203553967U (en) * | 2013-06-22 | 2014-04-16 | 欧阳常青 | Power frequency online single-inlet three-outlet uninterrupted power supply |
-
2014
- 2014-06-27 CN CN201410315621.9A patent/CN105322547A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3992652B2 (en) * | 2003-06-23 | 2007-10-17 | レシップ株式会社 | 3-phase input charger |
| CN2785231Y (en) * | 2005-02-24 | 2006-05-31 | 朱跃钢 | High voltage large-capacity continuous power supply equipment |
| CN203553967U (en) * | 2013-06-22 | 2014-04-16 | 欧阳常青 | Power frequency online single-inlet three-outlet uninterrupted power supply |
| CN103346675A (en) * | 2013-07-11 | 2013-10-09 | 北京工业大学 | High-power cascading electromagnetic emitter system with voltage continuously adjustable in wide range |
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