CN105429175A - Solar power generation grid-connected control system - Google Patents
Solar power generation grid-connected control system Download PDFInfo
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- CN105429175A CN105429175A CN201510895605.6A CN201510895605A CN105429175A CN 105429175 A CN105429175 A CN 105429175A CN 201510895605 A CN201510895605 A CN 201510895605A CN 105429175 A CN105429175 A CN 105429175A
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- 238000010248 power generation Methods 0.000 title abstract description 8
- 238000003079 width control Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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- H02J3/385—
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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
- H02M7/539—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 with automatic control of output wave form or frequency
- H02M7/5395—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 with automatic control of output wave form or frequency by pulse-width modulation
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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)
- Control Of Electrical Variables (AREA)
Abstract
The invention provides a solar power generation grid-connected control system. The solar power generation grid-connected control system comprises a boost module and an inverter module, wherein the boost module is used for converting a low-voltage DC signal into a high-voltage DC signal, outputting the high-voltage DC signal to the inverter module and also outputting a DC boosting voltage signal; the inverter module is used for converting the DC boosting voltage signal into a power frequency grid-connectable AC signal and outputting the power frequency grid-connectable AC signal to a three-phase grid. The solar power generation grid-connected control system realizes reliable grid connection of low-power solar power generation; grid connection does not cause current impact and almost has no influence on the system; the system carries a maximum power point tracking module, and is capable of adjusting output to the maximum power according to changes of sunlight exposure and temperature.
Description
Technical field
What the present invention relates to is a kind of device of solar energy generation technology field, specifically a kind of solar power grid-connection control system being applicable to small-sized photovoltaic power station.
Technical field
Along with world energy sources crisis constantly increases the weight of, the exploitation of new forms of energy more and more come into one's own, and solar power generation is as the regenerative resource of environmental protection, and its grid-connected system and combination method thereof have very high Research Significance and market value.
Solar energy power generating that is unstable, low-voltage, by power electronic device, exports and changes into stable, constant frequency, constant voltage synchronization AC electricity, to realize the object that solar energy power generating connects with existing electrical network, carries by described grid-connected system.
The technical problem that controller traditional is at present main and shortcoming be, assembly independent design does not possess and is incorporated into the power networks; Controller adopts has a grade mode to control solar cell policy; Do not possess totally digitilized DSP technology, the centralized management of digital synchronous Phase Lock Technique, MPPT maximum power point tracking technology (MPPT:MaximumPowerPointTracc), anti-islanding running technology, system and remote control technology, system component optimization emulation technology.
Through retrieving existing document, Chinese invention patent application numbers 200610028321.8, name is called: solar grid-connected electricity-generation energy output maximization circuit structure, this device by solar battery group, basic inversion unit, be flexible coupling device and controller, form many level tandem type inversion topological structure, by the control of controller to four switching device make-and-break times, make system reach Energy transmission to greatest extent and maximize.This system reaches to export by topological structure and maximizes, and can not change in real time and export, there is restriction in actual applications according to light intensity change.
The special application number 201010112321.0 of Chinese invention, name is called: solar three-phase grid-connected inverter, this device mountain three level bridge-type combining inverter and LC filter connect to form, which solves the problem reducing output voltage common mode component, but still exist and lack maximum output point control module, energy utilization rate is low, the shortcoming that integrated cost is high, grid-connected loss is large, efficiency is low, does not meet engineering reality.
Summary of the invention
The present invention is directed to prior art above shortcomings, a kind of solar power grid-connection control system is provided, achieve 10KW solar energy and send out also reliable grid connection, rush of current is not had when having grid-connected, system is not almost affected, system carries maximum power point road track module, according to the change regulation output of sunshine, temperature, can make it to reach power maximum.
The present invention is achieved by the following technical solutions, the present invention includes: boost module and inversion mould port, wherein: low-voltage dc signal is converted to high-voltage direct-current signal and exports inversion module to and is connected and exports DC boosting voltage signal by boost module, inversion module DC boosting voltage signal is converted to power frequency can synchronization AC signal export three phase network to.
Described boost module comprises: switch really flows boosting submodule and MPPT maximum power point tracking controls module, wherein: switch really flows boosting submodule and controls submodule with solar photovoltaic cell panel, MPPT maximum power point tracking respectively and inversion module is connected and receives low-voltage direct-current signal, pressure-increasning state signal and DC boosting voltage signal: MPPT maximum power point tracking controls submodule and solar photovoltaic cell panel is connected to form negative feedback loop and adopts pulse width modulation to control the output voltage of solar photovoltaic cell panel.
Described MPPT maximum power point tracking controls the built-in DC-to-DC converter containing digital signal processor of submodule, voltage and current detection circuit and drive circuit, the pressure-increasning state signal that this MPPT maximum power point tracking exports after controlling the low-voltage dc signal that submodule exports solar panel according to switch DC boosting submodule, controls by upgrading MPPT maximum power point tracking the adjustment of duty ratio realization to the output voltage of solar photovoltaic cell panel that submodule exports the pulse width modulating signal of solar photovoltaic cell panel to.
Described inversion module comprises: intelligent power submodule and Realization of pulse width modulation based on voltage space vector control submodule, wherein: intelligent power submodule is connected with boost module and transmits high-voltage direct-current signal, Realization of pulse width modulation based on voltage space vector control submodule is connected with intelligent power submodule and transmits sample rate current information of voltage and pulse-width control signal, and intelligent power submodule exports power frequency can synchronization AC signal.
The three-phase full-bridge inverter that described intelligent power submodule is made up of six IGBT (insulated gate bipolar transistor) encapsulation.
Described Realization of pulse width modulation based on voltage space vector controls submodule and judges that then Realization of pulse width modulation based on voltage space vector control submodule output pulse width control signal is determined to change direction when solar photovoltaic cell panel does not work in maximum power point, realizes making the working point of solar photovoltaic cell panel move until tend towards stability to maximum power point place all the time according to sample rate current information of voltage.
Compared with prior art, the invention has the beneficial effects as follows: system and electrical network parallel running control owing to adopting frequency-transposition arrangement to carry out output there is no rush of current time therefore grid-connected, system is not almost affected; Boosted by IGBT DC chopped-wave, the inversion of IPM module, control system can realize solar energy power generating reliable grid connection.DC chopped-wave adopts classical Boost circuit, continuous input current, drives simple; The SVPWM inversion that inverter adopts MCU to control, efficiency is high, and harmonic component is few, controls simple.MPPT maximum power point tracking controls to make system according to the change of light intensity at sunshine, always works near maximum power point (mpp), effectively utilizes solar energy, reduces system synthesis cost.Verify by experiment, after above-mentioned conversion, the phase place, harmonic wave, power factor, dynamic response etc. of output signal all meet design requirement, and grid connection efficiency is high, the output quality of power supply is good, MPPT maximum power point tracking is stablized, and is the ideal platform of solar photovoltaic power generation grid-connecting.
Accompanying drawing explanation
Fig. 1 is system configuration schematic diagram.
Embodiment
Elaborate to the embodiment of the present invention below, the present embodiment is implemented under premised on technical solution of the present invention, give detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, the present embodiment comprises: boost module and inversion module, wherein: low-voltage dc signal is converted to high-voltage direct-current signal and exports inversion module to and is connected and exports DC boosting voltage signal by boost module, DC boosting voltage signal being converted to power frequency against module can synchronization AC signal.
Described boost module comprises: switch DC boosting submodule and MPPT maximum power point tracking control submodule, wherein: switch DC boosting submodule controls submodule with solar photovoltaic cell panel, MPPT maximum power point tracking respectively and inversion module is connected and receives low-voltage direct-current signal, pressure-increasning state signal and DC boosting voltage signal, and MPPT maximum power point tracking controls submodule and solar photovoltaic cell panel is connected to form negative feedback loop and adopts the output voltage of pulse width modulation solar photovoltaic cell panel.
Described MPPT maximum power point tracking controls the built-in DC-to-DC converter containing digital signal processor of submodule, voltage and current detection circuit and drive circuit, the pressure-increasning state signal that this MPPT maximum power point tracking exports after controlling the low-voltage dc signal that submodule exports solar panel according to switch DC boosting submodule, controls by upgrading MPPT maximum power point tracking the adjustment of duty ratio realization to the output voltage of solar photovoltaic cell panel that submodule exports the pulse width modulating signal of solar photovoltaic cell panel to.
What the present embodiment breaker in middle DC boosting submodule adopted is DC boosting chopper circuit, wherein: d. c. reactor selects nominal value to be 2.5mll, and maximum current is DC28A; Direct current capacitor selects two direct current capacitor series connection, and single electric capacity nominal value is 2200 μ F, withstand voltage DC450V, and the capacitance group of formation is withstand voltage is DC900V, and total capacity is 1100 μ F; IGBT (insulated gate bipolar transistor) is CM100DY-24A type.
In the present embodiment, MPPT maximum power point tracking controls submodule, and employing disturbance observation completes the control to IGBT.By measuring current array power output, on former output voltage, then increase its power output of small voltage component can change, and measures the power after change, compares the direction can knowing changed power before change.Just continue to use former disturbance if power increases.If reduced, change former perturbation direction.
Described inversion is touched block and is comprised: intelligence leads to power modules and Realization of pulse width modulation based on voltage space vector controls submodule, wherein: intelligent power submodule is connected with boost module and transmits high-voltage direct-current signal, Realization of pulse width modulation based on voltage space vector submodule is connected to transmit with intelligent power submodule and adopts current-voltage information and pulse-width control signal, and intelligent power submodule exports power frequency can synchronization AC signal.
The three-phase full-bridge inverter that described intelligent power submodule is made up of six IGBT (insulated gate bipolar transistor) encapsulation, the IGBT adopted in the present embodiment (insulated gate bipolar transistor) is CM100DY-24A type.
That in the present embodiment, intelligent power submodule adopts is PM75RLA120, what Realization of pulse width modulation based on voltage space vector controlled submodule employing is SH7047 series HD64F7047F50 type RISC (RedueedInstructionSetComputer, Reduced Instruction Set Computer) microprocessor.
Described Realization of pulse width modulation based on voltage space vector controls submodule judges current solar photovoltaic cell panel operating state according to sample rate current information of voltage, when solar photovoltaic cell panel does not work in maximum power point, then Realization of pulse width modulation based on voltage space vector control submodule output pulse width control signal is determined to change direction, realizes making the working point of solar photovoltaic cell panel move until tend towards stability to maximum power point place all the time.
Be input as DC200 ~ 650V in this enforcement boost module, output voltage is DC750V, is adjusted the turn-off time T of IGBT by Gather and input DC voltage value
offwith the ratio of cycle T, 750V VD can be obtained.
In inversion module, the withstand voltage of intelligent power submodule can be determined according to ac line voltage peak value;
Wherein: U
uXbe specified output AC line voltage effective value, get 380V; K
nbe the withstand voltage safety allowance of IPM, value is 1.5 ~ 3, works as K
nwhen getting 2, U=1074.8V.
In inversion module, the resistance to flow valuve of intelligent power submodule can be determined according to IPM ac-side current;
Wherein: i
obe specified output AC phase current effective value, get 15.5A; K
nbe the safety allowance of the resistance to stream of IPM, get 2 i.e. twice overload situations, I=43.8A.
The present embodiment is converted by Technics of Power Electronic Conversion, makes output power factor close to I, and electric current and voltage harmonic component is few, and electric current and voltage same-phase, operating efficiency is high.Its grid-connected output does not pollute electrical network, and the quality of power supply is high, is the ideal platform of solar photovoltaic power generation grid-connecting.
Claims (5)
1. the solar power grid-connection control system of a technical field of solar utilization technique, comprise: boost module and inversion module, low-voltage dc signal is converted to high-voltage direct-current signal and exports inversion module to and is connected and exports DC boosting voltage signal by boost module, DC boosting voltage signal is converted to power frequency by inversion module can synchronization AC signal export three phase network to, it is characterized in that:
Described boost module comprises: switch DC boosting submodule, wherein: switch DC boosting submodule controls submodule with solar photovoltaic cell panel, MPPT maximum power point tracking respectively and inversion module is connected and receives low-voltage direct-current signal, pressure-increasning state signal and DC boosting voltage signal, and MPPT maximum power point tracking controls submodule and solar photovoltaic cell panel is connected to form negative feedback loop and adopts pulse width modulation to control the output voltage of solar photovoltaic cell panel:
Described inversion module comprises: intelligent power submodule and space vector of voltage pulse width modulation control submodule, wherein: intelligent power submodule is connected with boost module and transmits high-voltage direct-current signal, space vector of voltage pulse modulation control submodule is connected with intelligent power submodule and transmits sample rate current information of voltage and the wide control signal of pulse, and intelligent power submodule exports power frequency can synchronization AC signal.
2. solar power grid-connection control system according to claim 1, it is characterized in that, described MPPT maximum power point tracking controls built-in direct current---the direct current transducer containing digital signal processor of submodule, voltage and current detection circuit and drive circuit, the boost signal that this MPPT maximum power point tracking exports after controlling the low-voltage dc signal that submodule exports solar panel according to switch DC boosting submodule, the adjustment of duty ratio realization to the output voltage of solar photovoltaic cell panel that submodule exports the pulse width modulating signal of solar photovoltaic cell panel to is controlled by upgrading maximal power tracing.
3. solar power grid-connection control system according to claim 2, is characterized in that, the adjustment of the described output voltage to solar photovoltaic cell panel refers to: maximal power tracing controls submodule and adopts disturbance observation production burst bandwidth modulation signals.
4. solar power grid-connection control system according to claim 1, is characterized in that, described intelligent power submodule is encapsulated the three-phase full-bridge inverter formed by six insulated gate bipolar transistors.
5. solar power grid-connection control system according to claim 1, it is characterized in that, described space vector of voltage pulse modulation controls submodule judges current photovoltaic battery panel operating state according to sample rate current information of voltage, when solar photovoltaic cell panel does not work in maximum power point, then space vector of voltage pulse modulation control submodule output pulse width control signal is determined to change direction, realizes making the working point of solar photovoltaic cell panel move until tend towards stability to maximum power point place all the time.
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| CN201510895605.6A CN105429175A (en) | 2015-12-03 | 2015-12-03 | Solar power generation grid-connected control system |
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| CN201510895605.6A CN105429175A (en) | 2015-12-03 | 2015-12-03 | Solar power generation grid-connected control system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086600A (en) * | 2017-05-15 | 2017-08-22 | 昆明理工大学 | A kind of solar energy power generating three phase full bridge grid-connected inverting system |
| CN107104459A (en) * | 2017-04-21 | 2017-08-29 | 句容市宝启电子科技有限公司 | A kind of distributed generation system under intelligent grid environment |
| CN107994611A (en) * | 2017-12-14 | 2018-05-04 | 赵高琳 | A kind of method for maintaining photovoltaic plant stable operation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895129A (en) * | 2010-08-05 | 2010-11-24 | 上海交通大学 | AC-DC-AC wind power generation cut-in control system |
| CN101924376A (en) * | 2010-09-07 | 2010-12-22 | 上海交通大学 | Solar power grid-connection control system |
| CN104104085A (en) * | 2014-06-27 | 2014-10-15 | 国家电网公司 | Feedforward voltage drop and surge compensation device based on solar photovoltaic power generation, and method |
-
2015
- 2015-12-03 CN CN201510895605.6A patent/CN105429175A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895129A (en) * | 2010-08-05 | 2010-11-24 | 上海交通大学 | AC-DC-AC wind power generation cut-in control system |
| CN101924376A (en) * | 2010-09-07 | 2010-12-22 | 上海交通大学 | Solar power grid-connection control system |
| CN104104085A (en) * | 2014-06-27 | 2014-10-15 | 国家电网公司 | Feedforward voltage drop and surge compensation device based on solar photovoltaic power generation, and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104459A (en) * | 2017-04-21 | 2017-08-29 | 句容市宝启电子科技有限公司 | A kind of distributed generation system under intelligent grid environment |
| CN107086600A (en) * | 2017-05-15 | 2017-08-22 | 昆明理工大学 | A kind of solar energy power generating three phase full bridge grid-connected inverting system |
| CN107994611A (en) * | 2017-12-14 | 2018-05-04 | 赵高琳 | A kind of method for maintaining photovoltaic plant stable operation |
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Address after: 114018 No. 263, Yue Ling Road, hi tech Zone, Anshan, Liaoning. Applicant after: Liaoning Li Zhou science and Technology Co., Ltd. Address before: 114018 No. 201 Sifangtai Road, Tiexi District, Anshan, Liaoning. Applicant before: LIAONING LIZHOU ENERGY TECHNOLOGY CO., LTD. |
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Application publication date: 20160323 |