CN209298904U - A kind of light storage integration with APF function is generated electricity by way of merging two or more grid systems device - Google Patents

A kind of light storage integration with APF function is generated electricity by way of merging two or more grid systems device Download PDF

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Publication number
CN209298904U
CN209298904U CN201822212725.3U CN201822212725U CN209298904U CN 209298904 U CN209298904 U CN 209298904U CN 201822212725 U CN201822212725 U CN 201822212725U CN 209298904 U CN209298904 U CN 209298904U
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China
Prior art keywords
merging
light storage
bus
way
converter
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Expired - Fee Related
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CN201822212725.3U
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Chinese (zh)
Inventor
王素娥
吴永斌
郝鹏飞
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Shaanxi University of Science and Technology
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Shaanxi University of Science and Technology
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Priority to CN201822212725.3U priority Critical patent/CN209298904U/en
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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
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/20—Active power filtering [APF]
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

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  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The utility model provides a kind of light storage integration with APF function and generates electricity by way of merging two or more grid systems device, including the photovoltaic module for producing electricl energy；Boost, the output end of the input termination photovoltaic module of the Boost, while the output end of Boost is connected to DC bus through dc circuit breaker K1；The input terminal of photovoltaic combining inverter, the photovoltaic combining inverter is connect with DC bus, after output end is connected with AC circuit breaker K3, is connect through ac bus with power grid；Battery and super capacitor mould group and bidirectional DC-DC converter, the battery and super capacitor mould group using string and combine, the input terminal of the bidirectional DC-DC converter is connected, the output end of the bidirectional DC-DC converter is connected to DC bus through dc circuit breaker K2；It further include control unit, described control unit uses the signal of said modules feedback, and control instruction is delivered to said modules simultaneously.The utility model can make light storage microgrid make the best use of everything power grid peak load shifting and harmonics restraint.

Description

A kind of light storage integration with APF function is generated electricity by way of merging two or more grid systems device
Technical field
The utility model belongs to distributed generation technology field, and in particular to a kind of light storage integration with APF function Generate electricity by way of merging two or more grid systems device.
Background technique
Demand with the whole world to the energy is also corresponding growing, and effect of the new energy in energy resource structure becomes more To be important, wherein solar energy power generating is received significant attention with unique superiority.However, traditional photovoltaic grid-connected inversion Device has the problems such as intermittent low with equipment utilization, while non-linear, impact load continues to bring out in power grid, reduces electric energy Quality, traditional passive filtering can no longer meet.
Summary of the invention
In order to solve above-mentioned prior art problem, the purpose of the utility model is to provide a kind of light with APF function Device is generated electricity by way of merging two or more grid systems in storage integration can be to power grid peak load shifting and harmonic wave suppression according to intensity of illumination and dispatching of power netwoks instruction System makes light storage microgrid make the best use of everything.
The system of the utility model utilizes the general character of photovoltaic combining inverter and active filter in structure and principle, In conjunction with the energy storage devices such as battery and super capacitor mould group, photovoltaic DC-to-AC converter peak load shifting and harmonic wave control may be implemented, reach The effect of a tractor serves several purposes and save the cost.
In order to achieve the above purpose, the utility model provides the following technical solutions:
A kind of light storage integration with APF function is generated electricity by way of merging two or more grid systems device, including
Photovoltaic module for producing electricl energy, the photovoltaic module goes here and there n by m and the solar panel that constitutes forms；
Boost, the output end of the input termination photovoltaic module of the Boost, while Boost Output end be connected to DC bus through dc circuit breaker K1；
The input terminal of photovoltaic combining inverter, the photovoltaic combining inverter is connect with DC bus, output end and friendship After stream breaker K3 is connected, it is connect through ac bus with power grid；
Battery and super capacitor mould group and bidirectional DC-DC converter, the battery and super capacitor mould group use It goes here and there and combines, connect the input terminal of the bidirectional DC-DC converter, the output end of the bidirectional DC-DC converter is disconnected through direct current Road device K2 is connected to DC bus；
It further include control unit, described control unit uses the signal of said modules feedback, and simultaneously that control instruction is defeated It send to said modules.
In a preferred embodiment of the utility model, control open-circuit voltage that the photovoltaic module produces electricl energyU ocFor 334V, short circuit currentI scFor voltage corresponding to 40.6A and maximum power pointU mpFor 262V, corresponding electric currentI mpFor 38.15A。
In a preferred embodiment of the utility model, the m is odd number, and n is even number.
In a preferred embodiment of the utility model, the Boost, photovoltaic combining inverter and two-way DC-DC converter is all set in power cell.
In a preferred embodiment of the utility model, described control unit includes DSP control system, detection circuit with And driving circuit；Actual voltage, current value are converted to the voltage model that DSP control system can sample by the detection circuit It encloses；The driving circuit is constituted using isolation DC-DC module and HCPL-3120 light every driving chip, for controlling the power The on-off of MOSFET and IGBT in unit.
It further include accessory power supply in a preferred embodiment of the utility model, the accessory power supply use+15V ,- The Switching Power Supply of 15V, is powered described control unit.
In a preferred embodiment of the utility model, the dc circuit breaker K1 and K2 choose positive Thailand CZ0 contactor, The AC circuit breaker K3 chooses positive Thailand CJX1 contactor.
In a preferred embodiment of the utility model, the DSP control system is single by AD unit, PWM unit, control Member and protection location composition；The PWM unit generates the PWM of variable duty ratio, and AD unit is sampled for digital and analog signaling, Protection location includes alternating current-direct current over-voltage or overcurrent and overheat protector, and control unit is for executing relevant control instruction.
By above technical scheme, the utility model is had the technical effect that
The utility model can all can effectively utilize photovoltaic electricity.From the angle of function, realize that one is more With, have both parallel network reverse and active power filtering, solve conventional photovoltaic gird-connected inverter only limit daytime power generation, at night shut down stop The confinement problems of breath.Have simultaneously and fills and leads up low power consumption, inhibit grid power fluctuation, extend photovoltaic power generation effective time and change The advantages such as kind power quality.
Detailed description of the invention
Attached drawing 1 is the device of the invention schematic diagram.
Attached drawing 2 is photovoltaic array distribution map of the invention.
Attached drawing 3 is prime Boot converter and its control principle drawing of the invention.
Attached drawing 4 is photovoltaic combining inverter and its control principle drawing of the invention.
Attached drawing 5 is bidirectional DC-DC converter and its control principle drawing of the invention.
Attached drawing 6 is voltage and current detection circuit connection figure of the invention.
Attached drawing 7 is driver circuit schematic diagram of the invention.
Attached drawing 8 is control model selection figure of the invention.
Specific embodiment
The utility model is described in further details with reference to the accompanying drawing.
Embodiment 1
Shown in referring to Fig.1, a kind of light storage integration with APF function is generated electricity by way of merging two or more grid systems device, by power cell and control Unit two parts composition；
Including the photovoltaic module for producing electricl energy, the photovoltaic module goes here and there n and the solar battery board group that constitutes by m At；
Boost, the output end of the input termination photovoltaic module of the Boost, while Boost Output end be connected to DC bus through dc circuit breaker K1；
The input terminal of photovoltaic combining inverter, the photovoltaic combining inverter is connect with DC bus, output end and friendship After stream breaker K3 is connected, it is connect through ac bus with power grid；
Battery and super capacitor mould group and bidirectional DC-DC converter, the battery and super capacitor mould group use It goes here and there and combines, connect the input terminal of the bidirectional DC-DC converter, the output end of the bidirectional DC-DC converter is disconnected through direct current Road device K2 is connected to DC bus；
Above-mentioned Boost, photovoltaic combining inverter and bidirectional DC-DC converter are all set in power cell.
It further include control unit, described control unit uses the signal of said modules feedback, and simultaneously that control instruction is defeated It send to said modules.
The control system unit is by DSP28335 control system, detection circuit and driving circuit composition, DSP control system The core united as entire control system carries out AD sampling to system, exports the pwm signal of control, and in different operating ring The switching of control instruction under border；Voltage, current signal in power circuit is converted into DSP control system by detection circuit can be with The signal directly sampled；The pwm signal that driving circuit exports DSP carries out isolation amplification, controls major-minor inverter bridge.
The DSP control system is made of PWM unit, AD unit, control algolithm unit and protection location.Wherein PWM Unit generate variable duty ratio PWM, AD unit for digital and analog signaling sampling, protection location include alternating current-direct current over-voltage or Person's overcurrent and overheat protector, control unit is for executing relevant control instruction.
Embodiment 2
Photovoltaic module is as shown in Fig. 2, is solar panel (Suntech Power STP200- simultaneously by 5 strings 10 18-UB-1) the photovoltaic array formed, at the standard conditions (T=25 DEG C, s=1000w/m2), the electrical ginseng of 4 of the photovoltaic array Number be respectively as follows: that open-circuit voltage Uoc is 334V, short circuit current Isc is 40.6A and maximum power point corresponding to voltageU mpFor 262V, corresponding electric currentI mpFor 38.15A.
Boost topological structure is as shown in Fig. 3, the output end of input termination photovoltaic module, while Boost becomes The output end of parallel operation is connected to DC bus through dc circuit breaker K1.
Wherein: the electrolytic capacitor C of photovoltaic module side1Choose 100uF/500V, inductance L15mH is chosen, switching tube IGBT chooses FGL60N100BNTD, the electrolytic capacitor C of DC bus side2Choose 24mF/1000V.
By method of perturbation realize MPPT control, the disturbance observation method, first detection photovoltaic array output voltage and Electric current calculates the output power of photovoltaic array, then by the output voltage of disturbance photovoltaic array, observes photovoltaic array output work The variation of rate continuously changes disturbance voltage direction according to the trend of changed power, photovoltaic array is made finally to work in maximum power Point.
Dc circuit breaker K1 and K2 choose positive Thailand CZ0 contactor, and the AC circuit breaker K3 chooses positive Thailand CJX1 contact Device.
As shown in figure 4, bidirectional DC-DC converter and its control principle drawing, according to using non-isolated current reversibility copped wave Circuit works when needing to discharge to DC bus in Boost state；When there is extra electric energy, work in Buck state.Its Mesolow lateral capacitance C3Choose 1000uF/450V, inductance L2Choose 2.35mH.Choose the two close cycles control of power outer ring, current inner loop System strategy, can inhibit grid power to fluctuate；The control strategy of DC voltage outer ring, current inner loop is chosen, it can be female to direct current Line provides a stable voltage source.
The photovoltaic combining inverter topological structure with APF function is as shown in Fig. 5, the light with APF function The input terminal of volt gird-connected inverter is connect with DC bus, after output end is connected with AC circuit breaker K3, through ac bus and Power grid connection.Wherein three phase inverter bridge IPM uses PM50CLA120, ac filter inductance Ls to choose 3mH, and control strategy is using straight Flow the conventional double-loop control strategy of busbar voltage outer shroud, inductive current inner ring.
The bidirectional DC-DC converter topological structure is as shown in Fig. 6, and use is non-isolated, Current Reversible Chopper, It can work in Buck Boost state.Wherein low-pressure side electrolytic capacitor C3Choose 1000uF/450V, inductance L2It chooses 2.35mH.The double-loop control strategy for choosing power outer ring, current inner loop, can inhibit grid power to fluctuate；Choose direct current The control strategy of outer ring, current inner loop is pressed, a stable voltage source can be provided to DC bus.
The battery and super capacitor mould group are using going here and there and combining, and voltage reaches 300V, as bidirectional DC-DC converter The input terminal of device, simultaneously bi-directionally the output end of DC-DC converter is connected to DC bus through dc circuit breaker K2.
The detection circuit uses DC voltage Hall sensor (VSM025A), DC current Hall sensor (HDC- 10SY), AC voltage transformer (DL-PT202H1), alternating current Hall sensor (HX-10-P) and operational amplifier letter Number conditioning circuit composition, as shown in Fig. 6, DC voltage Hall sensor and AC voltage transformer parallel connection on the line, directly It flows current Hall sensor and the series connection of alternating current Hall sensor on the line, and actual voltage, current value is converted to The voltage range that DSP control chip can sample.Big signal is converted into slightly by Hall sensor using the principle of the raw electricity of magnetic Value, and D.C mutual-inductor utilizes the principle of similar transformer drops to voltage in the range of DSP can sample
The drive circuit module is using isolation DC-DC module (WRB1215CS) and HCPL-3120 light every driving chip It constitutes, for controlling the normal on-off of MOSFET and IGBT.As shown in Fig. 7, wherein isolation DC-DC module by one it is public+ 15V isolated from power is powered to corresponding HCPL-3120 respectively at multiple not small power supplies on ground altogether.
The Switching Power Supply of the accessory power supply use+15V, -15V are responsible for powering to entire control unit.
The control model is as shown in Fig. 8, measures real-time lighting intensity using GZD system illuminance sensor, leads to Cross intensity of illumination judgement enter that state, specific deterministic process are as follows: when intensity of illumination be greater than threshold value H, be judged as sunlight on daytime It is sufficient；When intensity of illumination is greater than threshold value L and is less than threshold value H, it is judged as that daytime sunlight is weaker；When intensity of illumination be less than threshold value L, Be judged as daytime sunlight it is faint and at night.
It is specific as follows according to intensity of illumination detected value and dispatching of power netwoks instruction selection operating mode:
In the case where daytime is sunny, photovoltaic module realizes that maximal power tracing is defeated by prime Boost Out, prime voltage source is provided for DC bus, the photovoltaic combining inverter with APF function works in photovoltaic inverter grid-connected shape State, to power grid input power.At this time according to the operating status of power grid, the working condition of bidirectional DC-DC converter is selected.When being in Peak of power consumption, under the action of bidirectional DC-DC converter, energy storage device works in Boost pressure constant state, together with photovoltaic module Power is provided to power grid, has the function that peak load shifting；When being in low power consumption, bidirectional DC-DC converter work exists Buck state carries out charging energy-storing to battery and super capacitor mould group；When being in non-electrical low ebb, bi-directional DC-DC Converter work inhibits grid power to fluctuate in Boost state, using energy storage.
In the case where daytime, sunlight was weaker, photovoltaic module realizes that maximal power tracing is defeated by prime Boost Out, simultaneously bi-directionally the work of DC/DC converter is in Boost constant voltage mode, and the energy of battery and super capacitor mould group is by two-way DC/DC converter maintains DC bus-bar voltage constant, and the photovoltaic combining inverter with APF function works in photovoltaic DC-to-AC converter Grid connection state, photovoltaic module and energy storage device provide power to power grid jointly, extend the grid-connected effective operating time of photovoltaic inversion.
In the case where sunlight on daytime faint and evening, photovoltaic module stops working, energy storage device using accumulation energy, Make bidirectional DC-DC converter work in Boost pressure constant state, the photovoltaic combining inverter with APF function works in active filter Wavy state compensates the harmonic wave in power grid, improves power quality.
In short, the utility model patent can all can effectively utilize photovoltaic electricity from the angle of power generation. From the angle of function, realizes that one is multi-purpose, have both parallel network reverse and active power filtering, solve conventional photovoltaic gird-connected inverter The only confinement problems of limit power generation on daytime, shutdown rest at night.Simultaneously have fill and lead up low power consumption, inhibit grid power fluctuation, Extend photovoltaic power generation effective time and improves the advantages such as power quality.

Claims (8)

  1. The device 1. a kind of light storage integration with APF function is generated electricity by way of merging two or more grid systems, which is characterized in that including the light for producing electricl energy Lie prostrate component, the photovoltaic module goes here and there n by m and the solar panel that constitutes forms；
    Boost, the output end of the input termination photovoltaic module of the Boost, while Boost is defeated Outlet is connected to DC bus through dc circuit breaker K1；
    The input terminal of photovoltaic combining inverter, the photovoltaic combining inverter is connect with DC bus, output end with exchange it is disconnected After road device K3 is connected, it is connect through ac bus with power grid；
    Battery and super capacitor mould group and bidirectional DC-DC converter, the battery and super capacitor mould group use string simultaneously Combination, connects the input terminal of the bidirectional DC-DC converter, the output end of the bidirectional DC-DC converter is through dc circuit breaker K2 is connected to DC bus；
    It further include control unit, described control unit uses the signal of said modules feedback, and is simultaneously delivered to control instruction Said modules.
  2. The device 2. a kind of light storage integration with APF function according to claim 1 is generated electricity by way of merging two or more grid systems, which is characterized in that The control open-circuit voltage that the photovoltaic module produces electricl energyU ocFor 334V, short circuit currentI scFor 40.6A and maximum power point Corresponding voltageU mpFor 262V, corresponding electric currentI mpFor 38.15A.
  3. The device 3. a kind of light storage integration with APF function according to claim 1 is generated electricity by way of merging two or more grid systems, which is characterized in that The m is odd number, and n is even number.
  4. The device 4. a kind of light storage integration with APF function according to claim 1 is generated electricity by way of merging two or more grid systems, which is characterized in that The Boost, photovoltaic combining inverter and bidirectional DC-DC converter are all set in power cell.
  5. The device 5. a kind of light storage integration with APF function according to claim 4 is generated electricity by way of merging two or more grid systems, which is characterized in that Described control unit includes DSP control system, detection circuit and driving circuit；The detection circuit is by actual voltage, electricity Flow valuve is converted to the voltage range that DSP control system can sample；The driving circuit is using isolation DC-DC module and HCPL- 3120 light are constituted every driving chip, for controlling the on-off of MOSFET and IGBT in the power cell.
  6. The device 6. a kind of light storage integration with APF function according to claim 5 is generated electricity by way of merging two or more grid systems, which is characterized in that It further include accessory power supply, the Switching Power Supply of the accessory power supply use+15V, -15V are powered described control unit.
  7. The device 7. a kind of light storage integration with APF function according to claim 1 is generated electricity by way of merging two or more grid systems, which is characterized in that The dc circuit breaker K1 and K2 chooses positive Thailand CZ0 contactor, and the AC circuit breaker K3 chooses positive Thailand CJX1 contactor.
  8. The device 8. a kind of light storage integration with APF function according to claim 5 is generated electricity by way of merging two or more grid systems, which is characterized in that The DSP control system is made of AD unit, PWM unit, control unit and protection location；The PWM unit generates duty ratio Variable PWM, AD unit are sampled for digital and analog signaling, and protection location includes alternating current-direct current over-voltage or overcurrent and excess temperature Protection, control unit is for executing relevant control instruction.
CN201822212725.3U 2018-12-27 2018-12-27 A kind of light storage integration with APF function is generated electricity by way of merging two or more grid systems device Expired - Fee Related CN209298904U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112994100A (en) * 2021-03-05 2021-06-18 河北工业大学 Multi-mode control photovoltaic grid-connected inverter based on intelligent distribution transformer terminal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112994100A (en) * 2021-03-05 2021-06-18 河北工业大学 Multi-mode control photovoltaic grid-connected inverter based on intelligent distribution transformer terminal
CN112994100B (en) * 2021-03-05 2023-08-22 河北工业大学 Multi-mode control photovoltaic grid-connected inverter based on intelligent distribution transformer terminal

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Granted publication date: 20190823

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