CN204046457U - A kind of combining inverter - Google Patents
A kind of combining inverter Download PDFInfo
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- CN204046457U CN204046457U CN201420449304.1U CN201420449304U CN204046457U CN 204046457 U CN204046457 U CN 204046457U CN 201420449304 U CN201420449304 U CN 201420449304U CN 204046457 U CN204046457 U CN 204046457U
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Abstract
The utility model discloses a kind of combining inverter, comprise the direct current that DC power supply exports is converted to high frequency and the first order alternating current that changes with city's Electrical change of pulsewidth recommend booster circuit, frequency is become by first order convert alternating current to be the current rectifying and wave filtering circuit of the sinusoidal wave half-wave of mains frequency twice, sinusoidal wave half-wave is transformed into and the power frequency translation circuit of civil power with the second level alternating current of frequency homophase, booster circuit and power frequency translation circuit are recommended in the output filter circuit and the control that are incorporated to civil power after second alternating current is carried out filtering matched-phase, detect the frequency of civil power and phase information and detection and control the governor circuit of the amplitude of described sinusoidal wave half-wave.The combining inverter that the utility model provides, to solve in prior art that combining inverter cost is high, efficiency is low and the problem such as fail safe is low.
Description
Technical field
The utility model relates to solar energy generation technology field, particularly relates to a kind of combining inverter.
Background technology
In the age that the current energy is day by day in short supply, solar energy is more and more subject to everybody attention as a kind of energy of clean and effective environmental protection.Along with the raising of solar panel technology, the cost of solar power generation is also more and more lower.
An important step of solar power generation is that the direct current sent from solar panel is transformed into alternating current through inverter and is incorporated to utility grid, is used for adjusting the surplus and deficiency of civil power.Usually realize this function by combining inverter, there is the shortcomings such as heavy, cost is high, efficiency is low in traditional combining inverter, and has shortcomings such as not isolating, coefficient of safety is low, brings inconvenience in actual use, can not meet normal need.
Utility model content
The utility model provides a kind of combining inverter, to solve in prior art that combining inverter cost is high, efficiency is low and the problem such as fail safe is low.
The utility model is achieved in that a kind of combining inverter, connects DC power supply and utility grid, comprises and recommend booster circuit, current rectifying and wave filtering circuit, power frequency translation circuit, output filter circuit and governor circuit;
The direct current that described DC power supply exports is converted to high frequency and the first order alternating current that changes with city's Electrical change of pulsewidth by described booster circuit of recommending;
Described first order convert alternating current becomes frequency to be the sinusoidal wave half-wave of mains frequency twice by described current rectifying and wave filtering circuit;
Described sinusoidal wave half-wave is transformed into and the second level alternating current of civil power with frequency homophase by described power frequency translation circuit;
Described output filter circuit is incorporated to described utility grid after described second alternating current is carried out filtering matched-phase;
Described governor circuit recommends booster circuit and described power frequency translation circuit described in controlling, and detects the frequency of described civil power and phase information and detection and control the amplitude of described sinusoidal wave half-wave;
Described booster circuit of recommending is connected with described DC power supply, described current rectifying and wave filtering circuit is connected with described booster circuit of recommending, described power frequency translation circuit is connected with described output filter circuit, and described governor circuit is connected with described booster circuit, described current rectifying and wave filtering circuit, described power frequency translation circuit and the described output filter circuit of recommending.
As optimal way of the present utility model, also comprise input filter circuit, be connected with described DC power supply, described input filter circuit reduces the galvanic interference that described in internal resistance filtering that described DC power supply sparks, DC power supply exports.
As optimal way of the present utility model, described input filter circuit comprises the first electric capacity, described first electric capacity is filtering storage capacitor, and the anode of described first electric capacity connects the anode of described DC power supply, and the negative terminal of described first electric capacity connects the negative terminal of described DC power supply.
As optimal way of the present utility model, described booster circuit of recommending comprises the first power field effect pipe, second power field effect pipe and the first transformer, described first transformer is high frequency transformer, the drain electrode of described first power field effect pipe and the drain electrode of described second power field effect pipe respectively with being end-to-end of described first primary winding, the source class of described first power field effect pipe is connected with the negative terminal of described first electric capacity respectively with the source class of described second power field effect pipe, the centre cap of described first primary is connected with the anode of described first electric capacity.
As optimal way of the present utility model, described current rectifying and wave filtering circuit comprises the first fast-recovery commutation bridge, the first inductance and the second electric capacity, two ac input ends of described first fast-recovery commutation bridge recommend being end-to-end of the described first transformer secondary output winding of booster circuit with described respectively, anode and first inductance of described first fast-recovery commutation bridge are connected and are connected with the anode of described second electric capacity afterwards, and the negative terminal of described first fast-recovery commutation bridge is connected with the negative terminal of described second electric capacity.
As optimal way of the present utility model, described power frequency translation circuit comprises full-bridge frequency converter, described full-bridge frequency converter comprises the 3rd power field effect pipe, the 4th power field effect pipe, the 5th power field effect pipe and the 6th power field effect pipe, described full-bridge frequency converter and described second Capacitance parallel connection.
As optimal way of the present utility model, described output filter circuit comprises the second inductance and the 3rd inductance, be incorporated to described utility grid after the mid point of the right half-bridge of described full-bridge frequency converter is connected with described second inductance, after the mid point of the left half-bridge of described full-bridge frequency converter is connected with described 3rd inductance, be incorporated to described utility grid.
As optimal way of the present utility model, described governor circuit comprises MCU microprocessor and the second transformer, described second transformer adopts power current instrument transformer, for detecting the amplitude of the electric current being incorporated to described utility grid and the phase place relative to utility grid voltage; The wherein two-way sinusoidal pulse width modulation signal that described MCU microprocessor exports transfers to the first power field effect pipe and the second power field effect pipe respectively through the first drive circuit, the other four tunnel sinusoidal pulse width modulation signals that described MCU microprocessor exports transfer to the 3rd power field effect pipe, the 4th power field effect pipe, the 5th power field effect pipe and the 6th power field effect pipe respectively through the second drive circuit, the AD sampling end of described MCU microprocessor and described second Capacitance parallel connection, described MCU microprocessor obtains two-way current detection signal from described second transformer.
The utility model comprises input filter circuit by adopting, recommends booster circuit, the combining inverter of current rectifying and wave filtering circuit, power frequency translation circuit, output filter circuit and governor circuit, makes DC power supply and utility grid isolation and has higher fail safe; Recommend in booster circuit simultaneously and adopt high frequency transformer as main conversion transformer, whole combining inverter is had, and volume is little, efficiency high; In power frequency translation circuit, power field effect pipe is at power frequency operation, so the drive circuit needed is very simple, does not need, with expensive half-bridge or the special high frequency driver of full-bridge, to reduce production cost; Governor circuit adopts MCU microprocessor to control, and guarantees that DC power supply remains on maximum power state work, inverter can be allowed to quit work when inverter occurs abnormal, guarantees the safety of whole inverter and stablizes.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit structure diagram of the utility model preferred embodiment;
Fig. 2 is the work wave schematic diagram of ignition distributor element in the middle part of the utility model preferred embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model execution mode is described in further detail.
As shown in Figure 1, the utility model embodiment discloses a kind of combining inverter, connects DC power supply 200 and utility grid 300, the DC source that DC power supply 200 exports for solar cell, can be solar panel permutation, also can be formed by a lot of solar cell plate serioparallels.
Combining inverter comprises input filter circuit 101, recommends booster circuit 102, current rectifying and wave filtering circuit 103, power frequency translation circuit 104, output filter circuit 105 and governor circuit 106; Recommend booster circuit 102 to be connected with DC power supply 200, current rectifying and wave filtering circuit 103 with recommend booster circuit 102 and be connected, power frequency translation circuit 104 is connected with output filter circuit 105, governor circuit 106 with recommend booster circuit 102, current rectifying and wave filtering circuit 103, power frequency translation circuit 104 and output filter circuit 105 and be connected.
Input filter circuit 101, is connected with DC power supply 200, reduces the internal resistance that sparks of DC power supply 200 and the galvanic interference that described in filtering, DC power supply 200 exports; This input filter circuit 101 comprises the first electric capacity C1, and this first electric capacity C1 is filtering storage capacitor, and the anode of the first electric capacity C1 connects the anode of DC power supply 200, and the negative terminal of the first electric capacity C1 connects the negative terminal of DC power supply 200.Owing to having certain internal resistance as the solar panel of DC power supply 200, the direct current exported to make DC power supply and voltage compare steady, it is larger that the capacity of the first electric capacity C1 is generally chosen, can reduce the internal resistance that DC power supply 200 sparks like this, the direct current that can also export DC power supply 200 plays the effect of filtering interfering.
Recommend booster circuit 102, the direct current that DC power supply 200 exports is converted to high frequency and the first order alternating current that changes with city's Electrical change of pulsewidth; This is recommended booster circuit 102 and comprises the first power field effect pipe Q1, the second power field effect pipe Q2 and the first transformer T1, the drain electrode of the first power field effect pipe Q1 and the drain electrode of the second power field effect pipe Q2 respectively with being end-to-end of the first transformer T1 armature winding, such as, when the drain electrode of the first power field effect pipe Q1 connects the head of the first transformer T1 armature winding, the drain electrode of the second power field effect pipe Q2 then connects the tail of the first transformer T1 armature winding, vice versa with; The source class of the first power field effect pipe Q1 is connected with the negative terminal of the first electric capacity C1 respectively with the source class of the second power field effect pipe Q2, and the elementary centre cap of the first transformer T1 is connected with the anode of the first electric capacity C1.Here, the grid of the first power field effect pipe Q1 and the second power field effect pipe Q2 have employed SPWM modulation, and carrier frequency is more than 20kHz, and pulsewidth controls by MPPT.In addition, first transformer T1 is high frequency transformer, high frequency transformer is compared to Industrial Frequency Transformer, operating frequency improves hundred times, and its weight and volume only has 1/tens of the Industrial Frequency Transformer of equal-wattage, efficiency can promote more than 10%, thus use high frequency transformer have lightweight, volume is little, efficiency advantages of higher; And high frequency transformer copper is few, so production cost is also significantly less than Industrial Frequency Transformer.First transformer T1 time level exports the first order alternating current that high frequency and pulsewidth change with city's Electrical change, and the frequency of China's civil power is 50Hz, and the frequency of the first alternating current of output is generally at more than 20KHz, and voltage is generally 350V.
Current rectifying and wave filtering circuit 103, becomes frequency to be the sinusoidal wave half-wave of mains frequency twice by first order convert alternating current, this current rectifying and wave filtering circuit 103 comprises the first fast-recovery commutation bridge BD1, first inductance L 1 and the second electric capacity C2, two ac input ends of the first fast-recovery commutation bridge BD1 respectively with being end-to-end of the first transformer T1 secondary winding of recommending booster circuit 102, the anode of the first fast-recovery commutation bridge BD1 is connected with the anode of the second electric capacity C2 after connecting with the first inductance L 1, the negative terminal of the first fast-recovery commutation bridge BD1 is connected with the negative terminal of the second electric capacity C2, the first order alternating current that first transformer T1 time level exports is through the first fast-recovery commutation bridge BD1 rectification, the sinusoidal wave half-wave that frequency is mains frequency twice is transformed into again after the first inductance L 1 and the second electric capacity C2 filtering, first inductance L 1 and the second electric capacity C2 constitute low pass filter, can the carrier signal filtering of more than 20kHz, thus at the second electric capacity C2 two ends only remaining frequency be mains frequency twice, clean sinusoidal wave half-wave.
Power frequency translation circuit 104, is transformed into sinusoidal wave half-wave and the second level alternating current of civil power with frequency homophase; This power frequency translation circuit 104 comprises full-bridge frequency converter, this full-bridge frequency converter comprises the 3rd power field effect pipe Q3, the 4th power field effect pipe Q4, the 5th power field effect pipe Q5 and the 6th power field effect pipe Q6, and full-bridge frequency converter is in parallel with the second electric capacity C2.Wherein the 3rd power field effect pipe Q3, the 4th power field effect pipe Q4, the 5th power field effect pipe Q5 and the 6th power field effect pipe Q6 are all at power frequency operation, it is less that the capacity of the second electric capacity C2 is generally chosen, such circuit cost reduces, simultaneously little to the impact of the 3rd power field effect pipe Q3, the 4th power field effect pipe Q4, the 5th power field effect pipe Q5 and the 6th power field effect pipe Q6, make whole circuit stability.Second electric capacity C2 two ends frequency is that the sinusoidal wave half-wave of mains frequency twice is transformed into and the second level alternating current of civil power with frequency homophase through this full-bridge frequency converter.
Output filter circuit 105, is incorporated to utility grid 300 after the second alternating current is carried out filtering matched-phase; This output filter circuit 105 comprises the second inductance L 2 and the 3rd inductance L 3, utility grid 300 is incorporated to after the mid point of the right half-bridge of full-bridge frequency converter is connected with the second inductance L 2, be incorporated to described utility grid 300 after the mid point of the left half-bridge of full-bridge frequency converter is connected with the 3rd inductance L 3, second level alternating current is incorporated to utility grid 300 after the second inductance L 2 and the 3rd inductance L 3 carry out filtering matched-phase.
Governor circuit 106, controls to recommend booster circuit 102 and power frequency translation circuit 104, and detects the frequency of civil power and phase information and detection and control the amplitude of sinusoidal wave half-wave; This governor circuit 106 comprises MCU microprocessor and the second transformer T2, and this second transformer T2 adopts power current instrument transformer, for detecting the amplitude of the electric current being incorporated to utility grid and the phase place relative to utility grid voltage; The wherein two-way sinusoidal pulse width modulation signal that MCU microprocessor exports transfers to the first power field effect pipe Q1 and the second power field effect pipe Q2 respectively through the first drive circuit; The other four tunnel sinusoidal pulse width modulation signals that MCU microprocessor exports transfer to the 3rd power field effect pipe Q3, the 4th power field effect pipe Q4, the 5th power field effect pipe Q5 and the 6th power field effect pipe Q6 respectively through the second drive circuit, because aforementioned four power field effect pipes are all at power frequency operation, so the second drive circuit needed is very simple, do not need with expensive half-bridge or the special high frequency driver of full-bridge, as long as just can realize driving function with the drive circuit of general simple transistor composition, thus reduce further cost; Wherein the first drive circuit and the second drive circuit are respectively used to mate each sinusoidal pulse width modulation signal and the driving voltage needed for each power field effect pipe and electric current that export.The AD sampling end of MCU microprocessor is in parallel with the second electric capacity C2, this AD sampling end can detect the frequency of civil power and phase place and voltage and current, guarantee that DC power supply 200 remains on maximum power state work, inverter can be allowed to quit work when inverter occurs abnormal, guarantee the safety of whole inverter and stablize; MCU microprocessor obtains two-way current detection signal from the second transformer T2, can detect the amplitude of the electric current being incorporated to utility grid and the phase place relative to utility grid voltage.
Fig. 2 shows the work wave schematic diagram of ignition distributor element in the middle part of the utility model preferred embodiment, as can be seen from the figure the work wave of each element, contributes to the specific implementation process understanding the utility model preferred embodiment further.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (8)
1. a combining inverter, connects DC power supply and utility grid, it is characterized in that, comprise and recommend booster circuit, current rectifying and wave filtering circuit, power frequency translation circuit, output filter circuit and governor circuit;
The direct current that described DC power supply exports is converted to high frequency and the first order alternating current that changes with city's Electrical change of pulsewidth by described booster circuit of recommending;
Described first order convert alternating current becomes frequency to be the sinusoidal wave half-wave of mains frequency twice by described current rectifying and wave filtering circuit;
Described sinusoidal wave half-wave is transformed into and the second level alternating current of civil power with frequency homophase by described power frequency translation circuit;
Described output filter circuit is incorporated to described utility grid after described second alternating current is carried out filtering matched-phase;
Described governor circuit recommends booster circuit and described power frequency translation circuit described in controlling, and detects the frequency of described civil power and phase information and detection and control the amplitude of described sinusoidal wave half-wave;
Described booster circuit of recommending is connected with described DC power supply, described current rectifying and wave filtering circuit is connected with described booster circuit of recommending, described power frequency translation circuit is connected with described output filter circuit, and described governor circuit is connected with described booster circuit, described current rectifying and wave filtering circuit, described power frequency translation circuit and the described output filter circuit of recommending.
2. combining inverter according to claim 1, it is characterized in that, also comprise input filter circuit, be connected with described DC power supply, described input filter circuit reduces the galvanic interference that described in internal resistance filtering that described DC power supply sparks, DC power supply exports.
3. combining inverter according to claim 2, it is characterized in that, described input filter circuit comprises the first electric capacity, described first electric capacity is filtering storage capacitor, the anode of described first electric capacity connects the anode of described DC power supply, and the negative terminal of described first electric capacity connects the negative terminal of described DC power supply.
4. combining inverter according to claim 1, it is characterized in that, described booster circuit of recommending comprises the first power field effect pipe, second power field effect pipe and the first transformer, described first transformer is high frequency transformer, the drain electrode of described first power field effect pipe and the drain electrode of described second power field effect pipe respectively with being end-to-end of described first primary winding, the source class of described first power field effect pipe is connected with the negative terminal of described first electric capacity respectively with the source class of described second power field effect pipe, the centre cap of described first primary is connected with the anode of described first electric capacity.
5. combining inverter according to claim 1, it is characterized in that, described current rectifying and wave filtering circuit comprises the first fast-recovery commutation bridge, the first inductance and the second electric capacity, two ac input ends of described first fast-recovery commutation bridge recommend being end-to-end of the described first transformer secondary output winding of booster circuit with described respectively, anode and first inductance of described first fast-recovery commutation bridge are connected and are connected with the anode of described second electric capacity afterwards, and the negative terminal of described first fast-recovery commutation bridge is connected with the negative terminal of described second electric capacity.
6. combining inverter according to claim 1, it is characterized in that, described power frequency translation circuit comprises full-bridge frequency converter, described full-bridge frequency converter comprises the 3rd power field effect pipe, the 4th power field effect pipe, the 5th power field effect pipe and the 6th power field effect pipe, described full-bridge frequency converter and described second Capacitance parallel connection.
7. combining inverter according to claim 1, it is characterized in that, described output filter circuit comprises the second inductance and the 3rd inductance, be incorporated to described utility grid after the mid point of the right half-bridge of described full-bridge frequency converter is connected with described second inductance, after the mid point of the left half-bridge of described full-bridge frequency converter is connected with described 3rd inductance, be incorporated to described utility grid.
8. combining inverter according to claim 1, it is characterized in that, described governor circuit comprises MCU microprocessor and the second transformer, described second transformer adopts power current instrument transformer, for detecting the amplitude of the electric current being incorporated to described utility grid and the phase place relative to utility grid voltage; The wherein two-way sinusoidal pulse width modulation signal that described MCU microprocessor exports transfers to the first power field effect pipe and the second power field effect pipe respectively through the first drive circuit, the other four tunnel sinusoidal pulse width modulation signals that described MCU microprocessor exports transfer to the 3rd power field effect pipe, the 4th power field effect pipe, the 5th power field effect pipe and the 6th power field effect pipe respectively through the second drive circuit, the AD sampling end of described MCU microprocessor and described second Capacitance parallel connection, described MCU microprocessor obtains two-way current detection signal from described second transformer.
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| CN201420449304.1U CN204046457U (en) | 2014-08-11 | 2014-08-11 | A kind of combining inverter |
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| CN201420449304.1U CN204046457U (en) | 2014-08-11 | 2014-08-11 | A kind of combining inverter |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262360A (en) * | 2015-11-02 | 2016-01-20 | 南京航空航天大学 | Single-phase push-pull inverter inhibiting secondary ripples |
| CN106160543A (en) * | 2016-07-03 | 2016-11-23 | 衢州昀睿工业设计有限公司 | A kind of power output circuit of extra-high pressure |
| CN106505870A (en) * | 2016-11-25 | 2017-03-15 | 广东百事泰电子商务股份有限公司 | A kind of long-life intelligently voltage boosting conversion equipment |
| CN109194157A (en) * | 2018-11-19 | 2019-01-11 | 国网四川省电力公司成都供电公司 | A kind of live inverter for stablizing output |
| CN109768726A (en) * | 2017-11-06 | 2019-05-17 | 哈尔滨工业大学（威海） | It is a kind of can under illumination bad condition efficiency operation solar inverter |
| CN113098313A (en) * | 2021-04-01 | 2021-07-09 | 惠州志顺电子实业有限公司 | Inversion feedback control circuit, control method and inverter |
| CN113644826A (en) * | 2021-08-12 | 2021-11-12 | 惠州志顺电子实业有限公司 | Inverter and inverter control method |
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2014
- 2014-08-11 CN CN201420449304.1U patent/CN204046457U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262360A (en) * | 2015-11-02 | 2016-01-20 | 南京航空航天大学 | Single-phase push-pull inverter inhibiting secondary ripples |
| CN105262360B (en) * | 2015-11-02 | 2018-04-13 | 南京航空航天大学 | A kind of suppression the single-phase of secondary ripple wave recommends inverter |
| CN106160543A (en) * | 2016-07-03 | 2016-11-23 | 衢州昀睿工业设计有限公司 | A kind of power output circuit of extra-high pressure |
| CN106160543B (en) * | 2016-07-03 | 2019-05-10 | 衢州昀睿工业设计有限公司 | A kind of power output circuit of extra-high voltage |
| CN106505870A (en) * | 2016-11-25 | 2017-03-15 | 广东百事泰电子商务股份有限公司 | A kind of long-life intelligently voltage boosting conversion equipment |
| CN109768726A (en) * | 2017-11-06 | 2019-05-17 | 哈尔滨工业大学（威海） | It is a kind of can under illumination bad condition efficiency operation solar inverter |
| CN109194157A (en) * | 2018-11-19 | 2019-01-11 | 国网四川省电力公司成都供电公司 | A kind of live inverter for stablizing output |
| CN113098313A (en) * | 2021-04-01 | 2021-07-09 | 惠州志顺电子实业有限公司 | Inversion feedback control circuit, control method and inverter |
| CN113644826A (en) * | 2021-08-12 | 2021-11-12 | 惠州志顺电子实业有限公司 | Inverter and inverter control method |
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Effective date of registration: 20180130 Address after: Caotan economic and Technological Development Zone, eco industrial park in Shaanxi city of Xi'an province is 710000 Jilu No. 8928 Patentee after: XI'AN HUAYI MICROELECTRONICS CO.,LTD. Address before: Yanta District 710000 Shaanxi city of Xi'an province Yong song Road No. 18 Qiutao Pavilion 1 room 40501 Patentee before: HOOYI SEMICONDUCTOR CO.,LTD. |
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Granted publication date: 20141224 Termination date: 20210811 |
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