CN209545234U - A kind of photovoltaic directly exchanges mixing micro-grid system - Google Patents
A kind of photovoltaic directly exchanges mixing micro-grid system Download PDFInfo
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- CN209545234U CN209545234U CN201920338958.XU CN201920338958U CN209545234U CN 209545234 U CN209545234 U CN 209545234U CN 201920338958 U CN201920338958 U CN 201920338958U CN 209545234 U CN209545234 U CN 209545234U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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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Abstract
The utility model discloses a kind of photovoltaics directly to exchange mixing micro-grid system, including photovoltaic generation unit and utility grid unit, unidirectional DC/DC converter is electrically connected on the photovoltaic generation unit, two-way AC/DC converter is electrically connected on the utility grid unit, the DC output end of the unidirectional DC/DC converter and two-way AC/DC converter, which couples, to be arranged, between photovoltaic generation unit and unidirectional DC/DC converter coupled in series have control its where connecting and disconnecting of the circuit control unit, described control unit includes the time relay, circuit disconnects where the time relay timing controlled, the time relay is electrically connected utility grid unit and where it is controlled when circuit disconnection, control the circuit conducting where utility grid unit；The utility model, so that switching between photovoltaic generation unit and utility grid unit when providing direct current, achievees the effect that electric energy efficiently uses with that can efficiently use photovoltaic generation unit.
Description
Technical field
The utility model relates to technical field of photovoltaic power generation, and mixing micro-capacitance sensor system is directly exchanged more particularly, to a kind of photovoltaic
System.
Background technique
Alternating current-direct current mixing micro-capacitance sensor refers to by distributed generation resource, energy storage device, energy converter, associated loadings and prison
Small-sized electric system made of control, protective device are collected is the autonomous system that can be realized self-contr ol, protection and management
System；Both include DC bus wherein according to the difference of distributed generation resource, also includes ac bus；Micro-capacitance sensor passes through in micro-capacitance sensor
The coordinated control of distributed power source output power can guarantee micro-capacitance sensor stable operation；Microgrid energy management system can be effectively
Optimization distribution and balance of the energy in micro-capacitance sensor are maintained, guarantees micro-capacitance sensor economical operation；Micro-capacitance sensor generally has using energy source
Rate is high, energy supply high reliablity, the advantages that pollutant emission is few, performance driving economy is good.
It is CN205646811U utility model patent that the prior art, which can refer to Authorization Notice No., and it discloses a kind of photovoltaic is straight
Exchange mixing micro-grid system, including DC bus, photovoltaic generation unit, utility grid, energy-storage units, UPS, DC load,
AC load and monitoring unit, photovoltaic generation unit are connected to DC bus, utility grid by the first unidirectional DC/DC converter
It is connected to DC bus by two-way AC/DC converter, energy-storage units are connected to DC bus by two-way DC/DC converter,
DC load is connected to DC bus by the second unidirectional DC/DC converter, and the input terminal of UPS is connected to DC bus and alternating current
Power grid, the output end of UPS connect AC load, and monitoring unit communicates to connect the first unidirectional DC/DC converter, two-way AC/DC becomes
Parallel operation, two-way DC/DC converter, the second unidirectional DC/DC converter and UPS；Maintain AC load uninterrupted for a long time by UPS
Operation；In off-network, photovoltaic generation unit and energy-storage units can maintain AC load power supply by UPS DC side.
But micro-grid system in the prior art cannot effectively combine the characteristic of photovoltaic power generation, so that causing to send out in photovoltaic
When electricity is powered, utility grid unit is equally powered, and not can be carried out the reasonable utilization of electric energy.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of photovoltaics directly to exchange the micro- electricity of mixing
Net system.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of photovoltaic directly exchanges mixing micro-grid system, including photovoltaic generation unit and utility grid unit, photovoltaic hair
It is electrically connected with unidirectional DC/DC converter on electric unit, two-way AC/DC converter, unidirectional DC/ are electrically connected on utility grid unit
The DC output end of DC converter and two-way AC/DC converter, which couples, to be arranged, in photovoltaic generation unit and unidirectional DC/DC converter
Between coupled in series have control its where connecting and disconnecting of the circuit control unit, control unit includes the time relay, the time relay
Circuit disconnects where timing controlled, and the time relay is electrically connected utility grid unit and when it controls place circuit and disconnects, control
Circuit conducting where utility grid unit processed.
By using above-mentioned technical proposal, since photovoltaic power generation has a periodic property, photovoltaic power generation when general daytime
It is high-efficient, therefore by the time relay can control when night control photovoltaic generation unit disconnection be powered, turn
And be powered using utility grid unit, and be converted to photovoltaic generation unit when daytime and be powered, it can be reasonable
Planning uses electric energy, increases the practical value of equipment.
The utility model is further arranged to: the induction coil coupled in series of the time relay has load resistance, and
The both ends of the series circuit of induction coil and the load resistance composition of the time relay are respectively coupled to low pressure 24V power supply and ground connection
End, the normally-closed contact of the time relay are coupled on the circuit between photovoltaic generation unit and unidirectional DC/DC converter.
By using above-mentioned technical proposal, the high-voltage end of the low-pressure end control photovoltaic power generation of 24V is set, can be improved transmission of electricity
Security performance in the process increases the practical value of equipment.
The utility model is further arranged to: coupled in parallel has compensating electric capacity on the unidirectional DC/DC converter.
The utility model is further arranged to: coupled in series has current detecting unit on the photovoltaic generation unit, described
Coupled in series has current displaing unit on current detecting unit.
By using above-mentioned technical proposal, current detecting unit is set and connection electric current is shown on current detecting unit
Unit can carry out the display of current value by current displaing unit, convenient for carrying out real-time control to output current value information, increase
The practical value of equipment is added.
The utility model is further arranged to: coupled in series has discharge display cells on the photovoltaic generation unit, described
Discharge display cells include pressure unit and the first LED display lamp for being connected to pressure unit.
By using above-mentioned technical proposal, specifically, the first LED display lamp of setting, can show that by the first display lamp
The discharge condition of photovoltaic generation unit, it is simple to operate, increase the practical value of equipment.
The utility model is further arranged to: coupled in parallel has the 2nd LED display lamp on the first LED display lamp.
By using above-mentioned technical proposal, the 2nd LED display lamp is set, is enabled in the damage of the first LED display lamp
When, the 2nd LED display lamp is equally able to carry out instruction, and it is simple to operate, increase the practical value of equipment.
The utility model is further arranged to: the first LED display lamp and the 2nd LED display lamp are green display
Lamp.
By using above-mentioned technical proposal, green indicator light is set, green light translucency is stronger, is convenient for electric discharge and reminds.
In conclusion the advantageous effects of the utility model are as follows:
1. photovoltaic power generation is high-efficient when general daytime, therefore passes through the time since photovoltaic power generation has periodic property
Relay can control when night control photovoltaic generation unit disconnection be powered, then use utility grid unit into
Row power supply, and be converted to photovoltaic generation unit when daytime and be powered, increase the practical value of equipment；
2. current detecting unit is set and connects current displaing unit on current detecting unit, it can be aobvious by electric current
Show that unit carries out the display of current value, convenient for carrying out real-time control to output current value information, increases the practical sexual valence of equipment
Value.
Detailed description of the invention
Fig. 1 is embodiment system flow block schematic illustration；
Fig. 2 is the circuit diagram that the first LED display lamp and the 2nd LED display lamp connection relationship are highlighted in embodiment；
Fig. 3 is the circuit diagram that detection unit and display unit are highlighted in embodiment.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
It referring to Figures 1 and 2, is that a kind of photovoltaic disclosed by the utility model directly exchanges mixing micro-grid system, including photovoltaic
Generator unit and utility grid unit, are electrically connected with unidirectional DC/DC converter on photovoltaic generation unit, on utility grid unit
It is electrically connected with two-way AC/DC converter, the DC output end coupling of unidirectional DC/DC converter and two-way AC/DC converter is arranged,
Between photovoltaic generation unit and unidirectional DC/DC converter coupled in series have control its where connecting and disconnecting of the circuit control unit, control
Unit processed includes the time relay, and circuit disconnects where time relay timing controlled, and the time relay is electrically connected utility grid
Unit and the circuit conducting where it is controlled when circuit disconnection, where control utility grid unit.
Coupled in series has a discharge display cells on unidirectional DC/DC converter, discharge display cells include pressure unit and
It is connected to the first LED display lamp of pressure unit；Pressure unit includes the step-down transformer of 220V/24V, and the one of step-down transformer
Secondary side is high-pressure side, and secondary side is low-pressure side；First LED display lamp coupled in series is in low-pressure side；On first LED display lamp simultaneously
Connection is coupled with the 2nd LED display lamp；Coupled in series has load resistance R11 on the first LED display lamp, in the 2nd LED display lamp
Upper coupled in series has load resistance R12；The other end of load resistance R11 and load resistance R12 are mutually coupled and are finally grounded and sets
It sets, the first LED display lamp and the 2nd LED display lamp are green indicator light；Control unit includes time relay KT, when
Between the electromagnetic coil KT1 of relay KT be coupled in series in the secondary side of pressure unit, on the electromagnetic coil KT1 of time relay KT
Coupled in series has load resistance R10；The normally-closed contact KT1 and photovoltaic generation unit coupled in series of time relay KT, it is normally opened
Contact KT2 and the main circuit coupled in series where utility grid unit.
Coupled in series has unidirectional DC/DC converter in discharge display cells, and the other end of unidirectional DC/DC converter is direct
It is electrically connected DC load end, has compensating electric capacity in the both ends coupled in parallel of unidirectional DC/DC converter.
Referring to Fig. 3, coupled in series has current detecting unit on photovoltaic generation unit, and current detecting unit includes series connection coupling
It is connected to the sampling resistor Rcs of photovoltaic generation unit, has current displaing unit, electric current in the both ends coupled in parallel of sampling resistor Rcs
Display unit includes the resistance R2 and resistance R1 for being respectively coupled to the both ends sampling resistor Rcs, and the other end of resistance R1 is coupled with
The negative sense of LM358 operational amplifier, positive input coupling resistance R2, the LM358 operational amplifier of LM358 operational amplifier is defeated
Enter to hold coupling resistance R1；Resistance R3, the other end ground connection of resistance R3 have been also coupled in the negative input of LM358 operational amplifier
Setting；Coupled in series has resistance R6 between the positive input and output end of LM358 operational amplifier, and the both ends of resistance R6 are simultaneously
Connection is coupled with phase compensation unit, and phase compensation unit includes coupled in series in the benefit of LM358 operational amplifier positive input
Resistance R5 and coupled in series are repaid in the compensating electric capacity C2 of the compensation resistance R5 other end, the other end of compensating electric capacity C2 is coupled to
The output end of LM358 operational amplifier；There are transfer resistance R7, conversion electricity in the output end coupled in series of LM358 operational amplifier
The other end of resistance R7 is coupled with single-chip microcontroller XMM1, and detection electric current can be shown by single-chip microcontroller XMM1.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (7)
1. a kind of photovoltaic directly exchanges mixing micro-grid system, it is characterised in that: including photovoltaic generation unit and utility grid list
Member is electrically connected with unidirectional DC/DC converter on the photovoltaic generation unit, is electrically connected on the utility grid unit two-way
The DC output end of AC/DC converter, the unidirectional DC/DC converter and two-way AC/DC converter, which couples, to be arranged, and is sent out in photovoltaic
Coupled in series has the control unit of its place connecting and disconnecting of the circuit of control between electric unit and unidirectional DC/DC converter, and the control is single
Member includes the time relay, and circuit disconnects where the time relay timing controlled, and the time relay is electrically connected alternating current
Power grid unit and the circuit conducting where it is controlled when circuit disconnection, where control utility grid unit.
2. a kind of photovoltaic according to claim 1 directly exchanges mixing micro-grid system, it is characterised in that: the time relay
The induction coil coupled in series of device has load resistance, and the series circuit of the induction coil of the time relay and load resistance composition
Both ends be respectively coupled to low pressure 24V power supply and ground terminal, the normally-closed contact of the time relay is coupled to photovoltaic generation unit and list
To on the circuit between DC/DC converter.
3. a kind of photovoltaic according to claim 1 directly exchanges mixing micro-grid system, it is characterised in that: the unidirectional DC/
Coupled in parallel has compensating electric capacity on DC converter.
4. a kind of photovoltaic according to claim 1 directly exchanges mixing micro-grid system, it is characterised in that: the photovoltaic power generation
Coupled in series has current detecting unit on unit, and coupled in series has current displaing unit on the current detecting unit.
5. a kind of photovoltaic according to claim 1 directly exchanges mixing micro-grid system, it is characterised in that: the photovoltaic power generation
Coupled in series has a discharge display cells on unit, and the discharge display cells include pressure unit and are connected to pressure unit
First LED display lamp.
6. a kind of photovoltaic according to claim 5 directly exchanges mixing micro-grid system, it is characterised in that: the first LED
Coupled in parallel has the 2nd LED display lamp on display lamp.
7. a kind of photovoltaic according to claim 6 directly exchanges mixing micro-grid system, it is characterised in that: the first LED
Display lamp and the 2nd LED display lamp are green display lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920338958.XU CN209545234U (en) | 2019-03-16 | 2019-03-16 | A kind of photovoltaic directly exchanges mixing micro-grid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920338958.XU CN209545234U (en) | 2019-03-16 | 2019-03-16 | A kind of photovoltaic directly exchanges mixing micro-grid system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209545234U true CN209545234U (en) | 2019-10-25 |
Family
ID=68275363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920338958.XU Active CN209545234U (en) | 2019-03-16 | 2019-03-16 | A kind of photovoltaic directly exchanges mixing micro-grid system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209545234U (en) |
-
2019
- 2019-03-16 CN CN201920338958.XU patent/CN209545234U/en active Active
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