CN203445831U - Independent photovoltaic power generation device based on four-switch five-level inverter - Google Patents
Independent photovoltaic power generation device based on four-switch five-level inverter Download PDFInfo
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- CN203445831U CN203445831U CN201320407974.2U CN201320407974U CN203445831U CN 203445831 U CN203445831 U CN 203445831U CN 201320407974 U CN201320407974 U CN 201320407974U CN 203445831 U CN203445831 U CN 203445831U
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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
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Abstract
The utility model provides an independent photovoltaic power generation device based on a four-switch five-level inverter, and belongs to the field of solar power generation. The independent photovoltaic power generation device based on the four-switch five-level inverter includes a photovoltaic array, a charge-discharge control unit, a storage battery set, a chopper boost unit, a four-switch five-level inverter, a filtering unit, a load, a voltage detection unit 1, a Tb driving unit, a T0 driving unit, a voltage detection unit 2, an inverter driving unit, a voltage detection unit 3, a current detection unit, a controller, an over-current protective unit and an overheating protective unit. The independent photovoltaic power generation device transforms direct current energy transformed by solar energy into power frequency alternating current and outputs through the four-switch five-level inverter, stores superfluous power in the storage battery through the charge-discharge control unit, and automatically changes to a storage battery power supply mode when the illumination condition is poor, so as to raise reliability of power supply and fully utilize solar energy.
Description
Technical field
The utility model relates to a kind of generation of electricity by new energy device, especially a kind of independent photovoltaic Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on four switch five-power level inverters.
Background technology
Tradition thermal power generation consumption of fossil fuels, not only produces a large amount of contamination hazard biological environments, and has aggravated the situation of non-regeneration energy global crisis.Photovoltaic generation is one of new forms of energy of at present tool prospect, because solar energy resources is widely distributed, inexhaustible and pollution-free, utilizes building roof and wall to convert solar energy into electrical energy especially a nowadays important directions of research.In communication base station, the power supply of traffic indicating equipment, outlying district, provide the occasions such as generating for oneself at present, photovoltaic power generation apparatus has obtained extensive utilization.Inverter in conventional photovoltaic system adopts the direct series connection of device for power switching, forms upper and lower bridge arm, need to avoid straight-through and cause bus bar side short circuit, and the driving pulse of switching device need to arrange dead band.The existence of Inverter Dead-time time can affect the output quality of power supply, and affected by electromagnetic interference etc., and the situation that device misleads occurs again and again, and system reliability is not high.The utility model provides a kind of independent photovoltaic Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on four switch five-power level inverters, inverter is without dead band, allow straight-through, and adopt four power devices to realize five level voltage outputs, the increase of level number has improved the output quality of power supply, has reduced volume and the loss of dv/dt and rear class filter.Utilize the control that discharges and recharges of storage battery simultaneously, photovoltaic power generation apparatus is carried out to peak load shifting, improve power supply reliability.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of independent photovoltaic Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on four switch five-power level inverters is provided.It allows to lead directly to without dead band by series coupled inductance in the middle of upper and lower bridge arm power device, and only needs four power devices can realize five level voltages outputs, improves the output quality of power supply and strengthens the anti-ability that misleads simultaneously.Utilize the energy storage characteristic of storage battery, the unnecessary electric energy that photovoltaic array is transformed carries out energy storage, and when night is unglazed, storage battery power supply carries out inversion, forms light and holds complementation, and designed overcurrent, overheating protection circuit, improves the reliability of device.
The technical scheme that the utility model adopts is:
The independent photovoltaic Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the utility model based on four switch five-power level inverters, it comprises: photovoltaic array, discharge and recharge control unit, batteries, copped wave boosting unit, four switch five-power level inverters, filter unit, load, voltage detection unit 1, Tb driver element, T0 driver element, voltage detection unit 2, inverter driving moving cell, voltage detection unit 3, current detecting unit, controller, over-current protecting unit and overtemperature protection unit.Photovoltaic array is connected with DC bus as the power supply of device, and batteries is connected and discharged and recharged control unit and be connected in parallel on DC bus by front end, not only as the back-up source of device but also bus excess energy can be stored; After copped wave boosting unit and four switch five-power level inverter cascades, form Converting Unit, bus direct current is converted to alternating current; The industrial-frequency alternating current that inversion goes out is connected with load by after the filtering of filter unit again; Controller is by gathering the signal of each detecting unit, and output pwm pulse driving switch pipe is worked.
The described independent photovoltaic Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on four switch five-power level inverters, photovoltaic array converts solar energy into direct current energy, batteries is attempted by DC bus through discharging and recharging control unit, busbar voltage is after copped wave boosting unit, as the given voltage of direct current of four switch five-power level inverters, inverter output AC voltage powering load after filter unit.The detection signal of controller receiver voltage detecting unit 1, voltage detection unit 2, voltage detection unit 3 and current detecting unit is exported 6 road pwm pulses and is passed through respectively the power switch pipe in Tb driver element, T0 driver element and Driven by inverter unit drives main circuit after software algorithm is processed.Controller receives the fault-signal of the output of over-current protecting unit and overtemperature protection unit, locking pulse, protection switch device simultaneously.
The described independent photovoltaic Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on four switch five-power level inverters, four switch five-power level inverters are comprised of 4 power tube T1～T4,4 sustained diode 2, D3 and D6, D7 and two coupling inductance Lt1, Lt2.Coupling inductance adopts T-shaped connected mode to be connected between upper and lower bridge arm power tube, coupling inductance centre tap is output, because the coupling inductance upper and lower bridge arm of having connected can lead directly to, without dead band, 4 power tubes have 16 kinds of on off states, and inverter is exportable 0, ± v
dc/ 2, ± v
dc(v
dcfor DC bus-bar voltage) 5 kinds of level.
The described independent photovoltaic Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on four switch five-power level inverters, controller is DSPTMS2812, and power device is IGBT, and batteries is 8 12V, and the connection in series-parallel of 100AH analysing valve control type lead-acid accumulator battery group forms.
The described independent photovoltaic Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on four switch five-power level inverters, driver element adopts Mitsubishi to produce the special-purpose thick film of IGBT and drives chip M57962L, detecting unit adopts Hall-type voltage, current sensor and peripheral processes circuit thereof, the power acquisition inverse-excitation type switch power-supply of controller and driver element.Overheated, over-current protecting unit adopts semistor and LM339 to form.
The utility model has the advantage of: four switch five-power level inverters only need four switching devices to realize five level inverse conversion Voltage-outputs, and the increase of level number has improved output voltage quality, reduces filter volume and loss.Due to the effect of coupling inductance, upper and lower bridge arm allows straight-through, and without the dead time, output electric energy is not affected by Dead Time, and has improved the anti-ability of misleading of device.When illumination is strong, unnecessary electric energy is stored in batteries by discharging and recharging control unit, when night or illumination condition be not when good, device automatically switches to storage battery power supply, inverter still can, for load provides industrial-frequency alternating current, not only make full use of the electric energy while of photovoltaic array conversion but also has improved power supply continuity.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the utility model device.
Fig. 2 is driver element circuit diagram.
Fig. 3 is current foldback circuit figure.
Fig. 4 is overheating protection circuit figure.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated, the present embodiment is to take technical solutions of the utility model as prerequisite, provided concrete execution mode and detailed operating process, but protection range of the present utility model is not limited to following embodiment.
Embodiment one: in present embodiment, in conjunction with Fig. 1, four switch five-power level inverter operation principles in the utility model device are described, by 4 power tube T1～T4,4 sustained diode 2, D3 and D6, D7 and two coupling inductance Lt1, Lt2, are formed.Coupling inductance adopts T-shaped connected mode to be connected between upper and lower bridge arm power tube, coupling inductance centre tap is output, because the coupling inductance upper and lower bridge arm of having connected can lead directly to, without dead band, 4 power tubes have 16 kinds of on off states, and inverter is exportable 0, ± v
dc/ 2, ± v
dc(v
dcfor DC bus-bar voltage) 5 kinds of level.For example: T1 turn-offs, T2 conducting, when T3 conducting, T4 turn-off, inverter output voltage is-v
dc; T1, T2, T3 conducting, when T4 turn-offs, inverter output voltage is-v
dc/ 2; T1, T3 conducting, when T2, T4 turn-off, output voltage is zero; When T1, T3, T4 conducting T2 turn-off, inverter output voltage is v
dc/ 2; T1, T4 conducting, when T2, T3 turn-off, inverter output voltage is v
dc.
Embodiment two: in present embodiment, in conjunction with Fig. 2, the driving control mode of each device for power switching in the utility model device is described.Adopt Mitsubishi to produce the special-purpose thick film of IGBT and drive chip M57962L, this chip is realized the electrical isolation between input and output by optocoupler.For improving IGBT, turn-off reliability, adopt dual power supply pattern.In drive circuit shown in Fig. 2, resistance R 1 is 2k Ω, and R2 is 4.7k Ω, and R5 is 30k Ω, and voltage stabilizing didoe D3, D4, D5 magnitude of voltage are got respectively 30V, 15V, 15V, and capacitor C 1, C2, C3 get respectively 100 μ F, 100 μ F, 0.1 μ F.D4, D5 form double limiting, prevent the too high IGBT of puncturing of grid voltage.During normal operation, 1 pin voltage is higher than collector voltage, and voltage-stabiliser tube D1 is reversed and punctures, fast recovery diode D2 conducting.Collector voltage is during higher than 15V, and D2 oppositely ends, 1 pin current cut-off, and 5 pin voltages become reverse swing door pole tension makes IGBT reliable turn-off.
Embodiment three: in present embodiment, when illumination is strong, through the direct voltage of photovoltaic array output higher than accumulator voltage, D0 conducting, the antiparallel diode cut-off of Tb, DC bus-bar voltage is provided by photovoltaic array; Otherwise when night or illumination condition are not good, the direct voltage of photovoltaic array output is lower than accumulator voltage, and D0 ends, the antiparallel diode current flow of Tb, it is DC bus powered that device automatically switches to storage battery.DC bus-bar voltage is inputted as the direct voltage of inverter after by copped wave boosting unit, and controller output driving pulse control inverter on off state, exports five level alternating voltages, is load supplying after filter unit.When load is less or illumination resource is abundant, unnecessary electric energy, by controlling Tb, through discharging and recharging control unit, forms buck circuit, to charge in batteries energy storage.The external interrupt pin of controller connects the output of overcurrent protection and overheating protection circuit, receives after fault-signal locking pulse immediately, and protection power device, improves device reliability.
Claims (5)
1. the independent photovoltaic Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on four switch five-power level inverters, it comprises: photovoltaic array (1), discharge and recharge control unit (2), batteries (3), copped wave boosting unit (4), four switch five-power level inverters (5), filter unit (6), load (7), voltage detection unit 1(8), Tb driver element (9), T0 driver element (10), voltage detection unit 2(11), inverter driving moving cell (12), voltage detection unit 3(13), current detecting unit (14), controller (15), over-current protecting unit (16), overtemperature protection unit (17), photovoltaic array (1) is connected with DC bus as the power supply of device, and batteries (3) is connected and discharged and recharged control unit (2) and be connected in parallel on DC bus by front end, not only as the back-up source of device but also bus excess energy can be stored, after copped wave boosting unit (4) and four switch five-power level inverter (5) cascades, form Converting Unit, bus direct current is converted to alternating current, the industrial-frequency alternating current that inversion goes out is connected with load by after the filtering of filter unit (6) again, controller (15) is by gathering the signal of each detecting unit, and output pwm pulse driving switch pipe is worked.
2. the independent photovoltaic Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on four switch five-power level inverters according to claim 1, it is characterized in that: described photovoltaic array (1) converts solar energy into direct current energy, batteries (3) is attempted by DC bus through discharging and recharging control unit (2), busbar voltage is after copped wave boosting unit (4), as the given voltage of direct current of four switch five-power level inverters (5), inverter output AC voltage is powering load after filter unit (6); Controller (15) receiver voltage detecting unit 1(8), voltage detection unit 2(11), voltage detection unit 3(13) and the detection signal of current detecting unit (14), via controller process after output 6 road pwm pulses pass through respectively the power switch pipe in Tb driver element (9), T0 driver element (10) and inverter driving moving cell (12) driving main circuit; Controller receives the fault-signal of over-current protecting unit (16) and overtemperature protection unit (17) output, locking pulse, protection switch device simultaneously.
3. the independent photovoltaic Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on four switch five-power level inverters according to claim 1, is characterized in that: four described switch five-power level inverters (5) are comprised of 4 power tube T1～T4,4 sustained diode 2, D3 and D6, D7 and two coupling inductance Lt1, Lt2; Coupling inductance adopts T-shaped connected mode to be connected between upper and lower bridge arm power tube, and coupling inductance centre tap is output; Due to the coupling inductance of having connected, upper and lower bridge arm can lead directly to, and without dead band, 4 power tubes have 16 kinds of on off states, and inverter is exportable 0, ± v
dc/ 2, ± v
dctotally 5 kinds of level, v
dcrepresent DC bus-bar voltage.
4. the independent photovoltaic Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on four switch five-power level inverters according to claim 1, it is characterized in that: described controller is DSPTMS2812, power device is IGBT, and batteries is 8 12V, and the connection in series-parallel of 100AH analysing valve control type lead-acid accumulator battery group forms.
5. the independent photovoltaic Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on four switch five-power level inverters according to claim 1, it is characterized in that: driver element adopts Mitsubishi to produce the special-purpose thick film of IGBT and drives chip M57962L, detecting unit adopts Hall-type voltage, current sensor and peripheral processes circuit thereof, the power acquisition inverse-excitation type switch power-supply of controller and driver element; Overheated, over-current protecting unit adopts semistor and LM339 to form.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320407974.2U CN203445831U (en) | 2013-07-10 | 2013-07-10 | Independent photovoltaic power generation device based on four-switch five-level inverter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320407974.2U CN203445831U (en) | 2013-07-10 | 2013-07-10 | Independent photovoltaic power generation device based on four-switch five-level inverter |
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| CN203445831U true CN203445831U (en) | 2014-02-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160549A (en) * | 2015-04-24 | 2016-11-23 | 郑州大学 | A kind of three-phase inverter using overlapping dual power supply |
| CN107742411A (en) * | 2017-11-16 | 2018-02-27 | 无锡七百二十度科技有限公司 | A kind of energy consumption acquisition system based on Internet of Things |
| CN110212628A (en) * | 2019-04-24 | 2019-09-06 | 广东工业大学 | Solar energy power generating inversion control switching system and switching method |
| CN111245274A (en) * | 2020-01-20 | 2020-06-05 | 湖北工业大学 | Novel four-switch five-level inverter |
| CN111550114A (en) * | 2020-04-13 | 2020-08-18 | 国网江苏省电力有限公司南京供电分公司 | Communication system platform capable of being quickly installed on electric power tower |
-
2013
- 2013-07-10 CN CN201320407974.2U patent/CN203445831U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160549A (en) * | 2015-04-24 | 2016-11-23 | 郑州大学 | A kind of three-phase inverter using overlapping dual power supply |
| CN106160549B (en) * | 2015-04-24 | 2018-08-24 | 郑州大学 | A kind of three-phase inverter using overlapping dual power supply |
| CN107742411A (en) * | 2017-11-16 | 2018-02-27 | 无锡七百二十度科技有限公司 | A kind of energy consumption acquisition system based on Internet of Things |
| CN110212628A (en) * | 2019-04-24 | 2019-09-06 | 广东工业大学 | Solar energy power generating inversion control switching system and switching method |
| CN110212628B (en) * | 2019-04-24 | 2021-12-10 | 广东工业大学 | Switching method of solar photovoltaic power generation inversion control switching system |
| CN111245274A (en) * | 2020-01-20 | 2020-06-05 | 湖北工业大学 | Novel four-switch five-level inverter |
| CN111550114A (en) * | 2020-04-13 | 2020-08-18 | 国网江苏省电力有限公司南京供电分公司 | Communication system platform capable of being quickly installed on electric power tower |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 Termination date: 20140710 |
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| EXPY | Termination of patent right or utility model |