CN201726334U - Photovoltaic grid-connected inverter - Google Patents
Photovoltaic grid-connected inverter Download PDFInfo
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- CN201726334U CN201726334U CN2010202106154U CN201020210615U CN201726334U CN 201726334 U CN201726334 U CN 201726334U CN 2010202106154 U CN2010202106154 U CN 2010202106154U CN 201020210615 U CN201020210615 U CN 201020210615U CN 201726334 U CN201726334 U CN 201726334U
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/123—Suppression of common mode voltage or current
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The utility model discloses a photovoltaic grid-connected inverter which comprises a voltage boost circuit, a sine half-wave circuit, a commutation circuit and a control circuit. The voltage boost circuit, the sine half-wave circuit and the commutation circuit are connected successively, and are controlled by the control circuit. When the input DC voltage is lower than an operation voltage of the sine half-wave circuit, the control circuit controls the boost voltage for being switched on for performing voltage boost to the input DC voltage, thereby supplying enough operation voltage for the sine half-wave circuit. When the input DC voltage is larger than or equal with the operation voltage of the sine half-wave circuit, the control circuit controls the voltage boost circuit in a switched-off state The input DC voltage directly arrives at the sine half-wave circuit through the voltage boost circuit. The inverter has the following advantages: satisfying a requirement of wide variation range of DC voltage input from the inverter, settling a problem of common-mode current in the circuit, reducing EMI in the circuit, reducing high-frequency switch loss and inductance loss, and improving the operation efficiency of the whole inverter.
Description
Technical field
The utility model relates to a kind of photovoltaic combining inverter, specifically is a kind of single-phase non-isolation type photovoltaic combining inverter.
Background technology
Solar energy is a kind of emerging green energy resource, it have cleaning, efficiently, never depleted, be not subjected to characteristics such as region resource limit, its have safe and reliable, noiseless, pollution-free, restriction less, advantages such as low, the easy maintenance of failure rate, thereby can be widely used in the every field of each social life, particularly be applied to grid-connected photovoltaic system.
Present single-phase non-isolation type photovoltaic combining inverter generally all adopts the DC/AC inverter directly DC input voitage to be carried out inversion, and this mode advantage is: circuit structure is simple.Its shortcoming is: the first, and the scope of DC input voitage is narrower; The second, the DC/AC inverter adopts the full-bridge circuit structure, and the switching device in the full-bridge circuit is modulated with unipolarity or bipolarity mode, for adopting the unipolarity modulation system, can not solve the problem of common mode current in the circuit; For adopting the bipolarity modulation system, though can solve the problem of common mode current in the circuit, the current ripples of AC side output is bigger, and it is big to exchange the output inductor loss, and circuit efficiency is low.
The utility model content
Technical problem to be solved in the utility model is at the prior art above shortcomings, a kind of photovoltaic combining inverter is provided, this inverter can satisfy the wide requirement of inverter input direct voltage excursion, solved the common mode current problem in the circuit, reduced the EMI in the circuit, reduce HF switch loss and inductor loss, improved the operating efficiency of whole inverter.
The technical scheme that solution the utility model technical problem is adopted is that this photovoltaic combining inverter comprises booster circuit, half-sinusoid circuit, commutating circuit and control circuit, described booster circuit, half-sinusoid circuit are connected successively with commutating circuit, by control circuit above-mentioned each circuit are controlled:
When input direct voltage is lower than the operating voltage of described half-sinusoid circuit, connect by control circuit control booster voltage, so that input direct voltage is boosted, thereby provide enough operating voltages for described half-sinusoid circuit; When input direct voltage was equal to or higher than the operating voltage of described half-sinusoid circuit, control circuit control booster circuit was in off state, and input direct voltage directly arrives the half-sinusoid circuit behind booster circuit.
Preferably, described booster circuit adopts the structure of a plurality of Boost circuit parallel connection, promptly adopt heterogeneous Boost parallel circuits, when input direct voltage is lower than the operating voltage of described half-sinusoid circuit, a plurality of switching tubes that described control circuit is controlled in the heterogeneous Boost parallel circuits are connected, described heterogeneous Boost parallel circuits is in running order, input direct voltage is boosted, for described half-sinusoid circuit provides enough operating voltages; When input direct voltage was equal to or higher than the operating voltage of described half-sinusoid circuit, a plurality of switching tubes that described control circuit is controlled in the heterogeneous Boost parallel circuits turn-offed, and heterogeneous Boost parallel circuits is not worked.
Control switching tube in the heterogeneous Boost parallel circuits with the work of heterogeneous PWM modulation system by control circuit, its operating state is according to concrete circuit parameter decision, promptly have only when input direct voltage is lower than the operating voltage of back level half-sinusoid circuit, heterogeneous Boost parallel circuits is just worked, input direct voltage is boosted, for late-class circuit provides stable operating voltage; When input direct voltage satisfies the operating voltage of back level half-sinusoid circuit, heterogeneous Boost parallel circuits is not worked, directly be admitted to the half-sinusoid circuit of back level behind the inductance element in the heterogeneous Boost parallel circuits of input direct voltage process, the switch element in the heterogeneous Boost parallel circuits then is in off state.Adopt the circuit structure of heterogeneous Boost parallel connection can play the effect of current-sharing, and the circuit structure of this parallel connection can reduce in the circuit EMI, reduce HF switch loss and inductor loss, improved operating efficiency.
More preferably, also include voltage sampling circuit in the utility model inverter, described voltage sampling circuit carries out real-time sampling to input direct voltage, send the magnitude of voltage that collects to control circuit again, control circuit sends connection and shutoff that control signal is controlled a plurality of switching tubes in the heterogeneous Boost parallel circuits after described magnitude of voltage is compared judgement.
Further preferably, described half-sinusoid circuit adopts the structure of a plurality of Buck circuit parallel connection, promptly adopt heterogeneous Buck parallel circuits, described control circuit is modulated a plurality of switching tubes in the heterogeneous Buck parallel circuits in the SPWM mode, change the direct current of input into the half-sinusoid electric current, for described commutating circuit provides the half-sinusoid electric current.Adopt heterogeneous Buck parallel circuits can play the effect of current-sharing, and the circuit structure of this parallel connection can reduce in the circuit EMI, reduce HF switch loss and inductor loss, improved operating efficiency.
Further preferably, described commutating circuit adopts full bridge inverter, thereby control circuit is sinusoidal current by the control that two brachium pontis to the commutation circuit carry out the power frequency switching with the half-sinusoid current transformation, to satisfy the needs that are incorporated into the power networks.
Buck circuit in the existing inverter is generally all as reduction voltage circuit work, and the Buck circuit in the utility model does not use as reduction voltage circuit, but use as the half-sinusoid circuit.
In the utility model, have only when input direct voltage is lower than the operating voltage of back level half-sinusoid circuit, booster circuit is just worked, for the half-sinusoid circuit provides stable operating voltage; When input direct voltage satisfies the operating voltage of back level half-sinusoid circuit, booster circuit will not worked.This working method of booster circuit effectively raises overall efficiency, has reduced unnecessary loss.
The utility model inverter adopts the topological structure of half-sinusoid circuit+commutating circuit, efficiently solves the problem of common mode current in the non-isolation type photovoltaic combining inverter.
All used the structure of Multiphase Parallel in the booster circuit of the utility model inverter and the half-sinusoid circuit, reduced the EMI in the circuit, reduced HF switch loss and inductor loss, improved operating efficiency, so the utility model belongs to a kind of efficient low power combining inverter.
Description of drawings
Fig. 1 is the theory diagram of the utility model photovoltaic combining inverter
Fig. 2 is the workflow diagram of the utility model photovoltaic combining inverter
Fig. 3 a is the circuit theory diagrams (control circuit is not shown among the figure) of the utility model photovoltaic combining inverter
Fig. 3 b is the circuit theory diagrams (showing control circuit) of the utility model photovoltaic combining inverter
Fig. 4 is the circuit working schematic diagram of the utility model photovoltaic combining inverter when the positive half cycle of power network current is worked
Fig. 5 is the circuit working schematic diagram of the utility model photovoltaic combining inverter when the power network current negative half period is worked
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 has described the schematic block circuit diagram of the utility model photovoltaic combining inverter.As shown in Figure 1, described photovoltaic combining inverter mainly comprises booster circuit, half-sinusoid circuit, commutating circuit and control circuit, and described booster circuit, half-sinusoid circuit are connected successively with commutating circuit, by the work of above-mentioned each circuit of control circuit control.
In the present embodiment, described booster circuit adopts heterogeneous Boost parallel circuits structure (comprise and adopt two or more Boost circuit in parallel), and control circuit is regulated with heterogeneous PWM modulation system the switching tube in the heterogeneous Boost parallel circuits.This booster circuit is only worked when input direct voltage is lower than the operating voltage of late-class circuit, thereby for late-class circuit provides stable operating voltage, when input direct voltage satisfied the operating voltage of late-class circuit, booster circuit was not worked.
In the present embodiment, described half-sinusoid circuit adopts heterogeneous Buck parallel circuits structure (comprising the Buck circuit that adopts two or more parallel connections), wherein, control circuit is exported thereby change the direct current of importing into the half-sinusoid electric current by adopting heterogeneous SPWM mode to modulate to each switching tube in the heterogeneous Buck parallel circuits.
In the present embodiment, described commutating circuit adopts the full-bridge circuit structure, and control circuit carries out power frequency by two brachium pontis to the commutation circuit and switches, and is sinusoidal current with the half-sinusoid current transformation, to satisfy the needs that are incorporated into the power networks.
Be parallel with filter capacitor C1 between PV array (PV cell panel) and the booster circuit, be parallel with storage capacitor C2 between booster circuit and the half-sinusoid circuit, be parallel with capacitor C 3 between half-sinusoid circuit and the commutating circuit.Wherein, filter capacitor C1 is used for filtering, and storage capacitor C2 is used for energy storage, and for late-class circuit provides enough operating voltages, capacitor C 3 is used for energy storage and High frequency filter, for back grade commutating circuit provides enough operating voltages.
Fig. 2 has described the workflow diagram of the utility model photovoltaic combining inverter.As shown in Figure 2, the concrete course of work of the utility model photovoltaic combining inverter circuit has following two kinds of situations: one, when input direct voltage Vin is lower than the operating voltage Ve of back level half-sinusoid circuit, heterogeneous Boost parallel circuits is with the modulation system work of PWM, input voltage is boosted, for back grade heterogeneous Buck parallel circuits provides enough operating voltages, modulate in the SPWM mode by heterogeneous Buck parallel circuits then, output half-sinusoid electric current, the half-sinusoid electric current is at last through full-bridge commutating circuit output sinusoidal current, to satisfy the needs that are incorporated into the power networks; They are two years old, when input direct voltage Vin is higher than the operating voltage Ve of back level half-sinusoid circuit, heterogeneous Boost parallel circuits is not worked, be that each switching tube in the heterogeneous Boost parallel circuits is in off state always, input direct voltage is directly sent into the heterogeneous Buck parallel circuits of back level through the inductance in the heterogeneous Boost parallel circuits, modulate in the SPWM mode by heterogeneous Buck parallel circuits, output half-sinusoid electric current, the half-sinusoid electric current is at last through full-bridge commutating circuit output sinusoidal current, to satisfy the needs that are incorporated into the power networks.The operating state of each circuit all is programme controlled by among the control circuit DSP F2812 in the above-mentioned inverter.
Fig. 3 a and Fig. 3 b are the circuit theory diagrams of the utility model photovoltaic combining inverter.Shown in Fig. 3 a, Fig. 3 b, in the present embodiment, booster circuit adopts two-phase Boost parallel circuits, and the half-sinusoid circuit adopts two-phase Buck parallel circuits.Wherein, heterogeneous Boost parallel circuits is similar to two-phase Boost parallel circuits, only needs the Boost booster circuit of corresponding number in parallel to get final product; Heterogeneous Buck parallel circuits is similar to two-phase Buck parallel circuits, only needs the Buck circuit of corresponding number in parallel to get final product.This sentences two phase circuit is that example specifically describes.
Described two-phase Boost parallel circuits, its first branch road Boost circuit comprises inductance L 1, diode D1, switching tube VT1.The output cathode of the input of inductance L 1 and PV cell panel joins, the anode of the output of inductance L 1 and diode D1 joins, the output of the anode of the drain electrode of switching tube VT1 and diode D1 and inductance L 1 joins, the output negative pole of the source electrode of switching tube VT1 and PV cell panel joins, and the drain electrode of the switching tube VT2 in the negative electrode of diode D1 and the back level Buck circuit is joined.The second branch road Boost circuit comprises inductance L 4, diode D7, switching tube VT7.The input of the inductance L 1 in the input of inductance L 4 and the first branch road Boost circuit joins, the anode of the output of inductance L 4 and diode D7 joins, the output of the anode of the drain electrode of switching tube VT7 and diode D7 and inductance L 4 joins, the negative pole of the source electrode of switching tube VT7 and PV cell panel joins, and the negative electrode of the diode D1 in the negative electrode of diode D7 and the first branch road Boost circuit joins.
The switching tube of described two-phase Buck parallel circuits uses two-phase SPWM mode to modulate, for back level commutating circuit provides the half-sinusoid electric current.Its first branch road Buck circuit comprises switching tube VT2, inductance L 2, diode D2.Diode D1 in the drain electrode of switching tube VT2 and the prime booster circuit and the negative electrode of D7 join, the input of the source electrode of switching tube VT2 and inductance L 2 joins, the source electrode of the negative electrode of diode D2 and switching tube VT2 joins, the negative pole of the anode of diode D2 and PV cell panel joins, the source electrode of the input of inductance L 2 and switching tube VT2 joins, and the drain electrode of switching tube VT3 is joined in the output of inductance L 2 and the back level commutating circuit.The second branch road Buck circuit comprises switching tube VT8, inductance L 5, diode D8.The drain electrode of switching tube VT2 in the drain electrode of its switching tube VT8 and the first branch road Buck circuit is joined, the input of the source electrode of switching tube VT8 and inductance L 5 joins, the source electrode of the negative electrode of diode D8 and switching tube VT8 joins, the negative pole of the anode of diode D8 and PV cell panel joins, the source electrode of the input of inductance L 5 and switching tube VT2 joins, and the output of the inductance L 2 in the output of inductance L 5 and the first branch road Buck circuit joins.
Described commutating circuit is to adopt full-bridge circuit, switches with power frequency, realizes the electric current commutation, is sinusoidal current with the half-sinusoid current transformation, to satisfy the needs that are incorporated into the power networks.Described full-bridge circuit comprises switching tube VT3, VT4, VT5, VT6, wherein the source electrode of switching tube VT3 links to each other with the drain electrode of switching tube VT4, the source electrode of switching tube VT5 links to each other with the drain electrode of switching tube VT6, the drain electrode of switching tube VT3 links to each other with the drain electrode of switching tube VT5, the output of the inductance L 2 in its tie point and the front stage circuits joins, the source electrode of the source electrode of switching tube VT4 and switching tube VT6 joins, and the negative pole of its tie point and PV cell panel joins.
Shown in Fig. 3 b, also include voltage in the described inverter and adopt circuit, described voltage adopts circuit to be connected on the output of PV cell panel, and voltage adopts circuit and is electrically connected with control circuit.
Described control circuit also is connected with switching tube VT1 switching tube VT7 in the two-phase Boost parallel circuits respectively, be connected with switching tube VT2, switching tube VT8 in the two-phase Buck parallel circuits, be electrically connected with switching tube VT3, switching tube VT6, switching tube VT4, switching tube VT5 in the commutating circuit.
In the present embodiment, control circuit adopts the modular circuit among DSP (digital information processor) F2812, and wherein, the concrete model of DSP can be TMS320F2812.
Fig. 4 and Fig. 5 only specifically describe the circuit working principle of the wherein branch road in the two phase circuit of photovoltaic combining inverter among Fig. 3, and the operation principle of an other branch road is identical with it.
Fig. 4 is the circuit working schematic diagram of the utility model photovoltaic combining inverter when the positive half cycle of power network current.As shown in Figure 4, at the power network current positive half period, switching tube VT2, VT3 in the inverter, VT6 conducting, switching tube VT4 and not conducting of VT5, wherein the switching tube VT2 in the two-phase Buck parallel circuits works in high frequency with the SPWM modulation system, and for back grade commutating circuit provides the half-sinusoid electric current, switching tube VT3 and VT6 in the commutating circuit work in power frequency, for the forward current in the circuit provides path, the sense of current in the circuit as shown in phantom in Figure 4.
Fig. 5 is the circuit working schematic diagram of the utility model photovoltaic combining inverter when the power network current negative half period.As shown in Figure 5, at the power network current negative half-cycle, switching tube VT2, VT4 in the inverter, VT5 conducting, switching tube VT3, not conducting of VT6, wherein switching tube VT2 works in high frequency in the SPWM mode, and for back level commutating circuit provides the half-sinusoid electric current, switching tube VT4 and VT5 work in power frequency, for the negative current in the circuit provides path, the sense of current in the circuit as shown in phantom in Figure 5.
The control procedure of control circuit to whole inverter is described below:
At first the input direct voltage of PV array is carried out real-time sampling by voltage sampling circuit, then the magnitude of voltage that collects is sent to dsp controller (control circuit), after dsp controller compares judgement to above-mentioned magnitude of voltage, send control signal 1, with switching tube VT1 in the control Boost circuit and connection and the shutoff of switching tube VT7, thereby the keying of control Boost circuit is to realize the boost function of circuit.Dsp controller also sends control signal 2, control signal 3 and control signal 4 simultaneously, switching tube VT2 in dsp controller and the two-phase Buck parallel circuits and the grid of switching tube VT8 link to each other, and send control signal 2 it is controlled, thereby with the switching tube work in the modulation signal control two-phase Buck parallel circuits of SPWM, the waveform that makes the output current of two-phase Buck parallel circuits is the half-sinusoid waveform.Switching tube VT3 in dsp controller and the commutating circuit and the grid of switching tube VT6 are connected, by sending the on off state of control signal 3 direct control switch pipe VT3 and VT6, dsp controller also with commutating circuit in switching tube VT4 and the grid of switching tube VT5 be connected, by sending the on off state of control signal 4 direct control switch pipe VT4 and VT5.And control signal 3 and control signal 4 are complementary two symmetrical groups modulation signals of power frequency band Dead Time, these two groups of control signals make the half-sinusoid electric current of two-phase Buck parallel circuits output commutate with power frequency, finally are met the power frequency sinusoidal current of electrical network requirement.
Be understandable that above execution mode only is the illustrative embodiments that adopts for principle of the present utility model is described, yet the utility model is not limited thereto.For those skilled in the art, under the situation that does not break away from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement also are considered as protection range of the present utility model.
Claims (10)
1. a photovoltaic combining inverter is characterized in that comprising booster circuit, half-sinusoid circuit, commutating circuit and control circuit, and described booster circuit, half-sinusoid circuit are connected successively with commutating circuit, by control circuit above-mentioned each circuit is controlled:
When input direct voltage is lower than the operating voltage of described half-sinusoid circuit, connect by control circuit control booster voltage, so that input direct voltage is boosted, thereby provide enough operating voltages for described half-sinusoid circuit; When input direct voltage was equal to or higher than the operating voltage of described half-sinusoid circuit, control circuit control booster circuit was in off state, and input direct voltage directly arrives the half-sinusoid circuit behind booster circuit.
2. photovoltaic combining inverter according to claim 1, it is characterized in that described booster circuit adopts the structure of a plurality of Boost circuit parallel connection, promptly adopt heterogeneous Boost parallel circuits, when input direct voltage is lower than the operating voltage of described half-sinusoid circuit, a plurality of switching tubes that described control circuit is controlled in the heterogeneous Boost parallel circuits are connected, described heterogeneous Boost parallel circuits is in running order, input direct voltage is boosted, for described half-sinusoid circuit provides enough operating voltages; When input direct voltage was equal to or higher than the operating voltage of described half-sinusoid circuit, a plurality of switching tubes that described control circuit is controlled in the heterogeneous Boost parallel circuits turn-offed, and heterogeneous Boost parallel circuits is not worked.
3. photovoltaic combining inverter according to claim 2, it is characterized in that also including voltage sampling circuit, described voltage sampling circuit carries out real-time sampling to input direct voltage, send the magnitude of voltage that collects to control circuit again, control circuit sends connection and shutoff that control signal is controlled a plurality of switching tubes in the heterogeneous Boost parallel circuits after described magnitude of voltage is compared judgement.
4. according to the described photovoltaic combining inverter of one of claim 1-3, it is characterized in that described half-sinusoid circuit adopts the structure of a plurality of Buck circuit parallel connection, promptly adopt heterogeneous Buck parallel circuits, described control circuit is modulated a plurality of switching tubes in the heterogeneous Buck parallel circuits in the SPWM mode, changes the direct current of importing into the half-sinusoid electric current.
5. photovoltaic combining inverter according to claim 4, it is characterized in that described commutating circuit adopts full bridge inverter, thereby it is sinusoidal current with the half-sinusoid current transformation that control circuit carries out the power frequency switching controls by two brachium pontis to the commutation circuit, to satisfy the needs that are incorporated into the power networks.
6. photovoltaic combining inverter according to claim 4 is characterized in that described control circuit adopts the modular circuit among the DSP F2812.
7. photovoltaic combining inverter according to claim 6, the model that it is characterized in that the DSP that control circuit adopts is TMS320F2812.
8. according to the described photovoltaic combining inverter of one of claim 1-3, it is characterized in that before booster circuit, being parallel with filter capacitor (C1).
9. according to the described photovoltaic combining inverter of one of claim 1-3, it is characterized in that being parallel with between described booster circuit and the half-sinusoid circuit storage capacitor (C2).
10. according to the described photovoltaic combining inverter of one of claim 1-3, it is characterized in that being parallel with between described half-sinusoid circuit and the commutating circuit electric capacity (C3).
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| CN2010202106154U CN201726334U (en) | 2010-05-26 | 2010-05-26 | Photovoltaic grid-connected inverter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202106154U CN201726334U (en) | 2010-05-26 | 2010-05-26 | Photovoltaic grid-connected inverter |
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| CN201726334U true CN201726334U (en) | 2011-01-26 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185508A (en) * | 2011-05-23 | 2011-09-14 | 南昌航空大学 | Pulse-width modulation (PWM) inverted power supply system and algorithm based on fuzzy predictive control technology |
| CN102684522A (en) * | 2011-03-09 | 2012-09-19 | 上海康威特吉能源技术有限公司 | Non-isolated photovoltaic grid-connected inverter and control method thereof |
| CN103378761A (en) * | 2012-04-24 | 2013-10-30 | 丰郅(上海)新能源科技有限公司 | Three-stage topology photovoltaic inverter |
| CN103765754A (en) * | 2011-08-17 | 2014-04-30 | 艾思玛太阳能技术股份公司 | Inverter with coupled inductances |
| CN103944411A (en) * | 2014-04-10 | 2014-07-23 | 重庆瑜欣平瑞电子有限公司 | Generator frequency converter |
-
2010
- 2010-05-26 CN CN2010202106154U patent/CN201726334U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684522A (en) * | 2011-03-09 | 2012-09-19 | 上海康威特吉能源技术有限公司 | Non-isolated photovoltaic grid-connected inverter and control method thereof |
| CN102185508A (en) * | 2011-05-23 | 2011-09-14 | 南昌航空大学 | Pulse-width modulation (PWM) inverted power supply system and algorithm based on fuzzy predictive control technology |
| CN103765754A (en) * | 2011-08-17 | 2014-04-30 | 艾思玛太阳能技术股份公司 | Inverter with coupled inductances |
| CN103765754B (en) * | 2011-08-17 | 2016-06-01 | 艾思玛太阳能技术股份公司 | There is the invertor of coupling inductance |
| CN103378761A (en) * | 2012-04-24 | 2013-10-30 | 丰郅(上海)新能源科技有限公司 | Three-stage topology photovoltaic inverter |
| CN103944411A (en) * | 2014-04-10 | 2014-07-23 | 重庆瑜欣平瑞电子有限公司 | Generator frequency converter |
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