CN107658900A - Photovoltaic parallel in system - Google Patents
Photovoltaic parallel in system Download PDFInfo
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- CN107658900A CN107658900A CN201710951923.9A CN201710951923A CN107658900A CN 107658900 A CN107658900 A CN 107658900A CN 201710951923 A CN201710951923 A CN 201710951923A CN 107658900 A CN107658900 A CN 107658900A
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- 238000010248 power generation Methods 0.000 claims abstract description 116
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- 230000005540 biological transmission Effects 0.000 claims description 27
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- 238000005304 joining Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 7
- 230000001360 synchronised effect Effects 0.000 description 8
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- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
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- H02J3/383—
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- H02J3/385—
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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
Abstract
The invention discloses a kind of photovoltaic parallel in system.The system includes：Photovoltaic power generation equipment, for exporting direct current power；Bi-directional inverter, it is connected between photovoltaic power generation equipment and AC network；Inverter, it is connected between photovoltaic power generation equipment and AC load；First detection device, is arranged between photovoltaic power generation equipment and bi-directional inverter；Second detection device, is arranged between AC network and bi-directional inverter；3rd detection device, is arranged between AC load and inverter；MPPT controller, the input end of MPPT controller connect the first detection device, the second detection device and the 3rd detection device, the output end connection bi-directional inverter and inverter of MPPT controller.The MPPT that the present invention solves existing photovoltaic generating system designs the technical problem for being not particularly suited for the integral photovoltaic parallel in system of hair electricity.
Description
Technical field
The present invention relates to field of power transmission, in particular to a kind of photovoltaic parallel in system.
Background technology
Solar energy gets more and more people's extensive concerning, over nearly more than 20 years, solar energy is wide as a kind of energy of clean environment firendly
It is general to be applied to each occasion.Solar energy power generating is a kind of important form of Solar use, is to use photovoltaic module by light
The forms of electricity generation of electric energy can be converted to, and with the continuous progress of technology, photovoltaic generation is probably most promising
One of generation technology.
In photovoltaic generating system, the utilization rate of photovoltaic module has outside the Pass except the bulk properties with photovoltaic cell, also by
The influence of the factor such as use environment such as irradiation level, load and stabilization.Under different external condition, photovoltaic module may operate in
On different and unique maximum power point.Therefore, maximum power point tracking technology MPPT (Maxiumum Power Point
Tracking) it is important technology that luminous energy is converted into electric energy to greatest extent.
Current photovoltaic generating system between the output of photovoltaic module and the Current Voltage of power network mainly by carrying out
Loop design completes MPPT controls, to realize net synchronization capability index of luminous energy electric energy and power network etc..Understand accordingly, current photovoltaic
Electricity generation system main function is to generate electricity, and its purpose mainly converts light energy into the electric energy with synchronized to greatest extent, its
It is network system that load, which can be approximately considered,；Backend load electricity consumption is then after importing power network by solar energy converting electrical energy, by power network
United Dispatching.Therefore, the crucial of MPPT controls only need to ensure that photovoltaic electric energy is synchronous with power network.
In the photovoltaic system of hair electricity one, load can not be approximately that power network is examined, it is necessary to which backend load is included in merely
Amount is directly controlled, and its mode of operation is also no longer pure power generation mode, wherein, photovoltaic system needs in each mode
Switched in real time, however maintain the existing state modulators of MPPT result do not ensure that intermediate dc bus voltage stabilization and
The control targe of power factor sine-wave current, that is to say, that the MPPT designs of existing photovoltaic generating system are not particularly suited for
The photovoltaic parallel in system of hair electricity one.For this problem, effective solution is not yet proposed at present.
The content of the invention
The embodiments of the invention provide a kind of photovoltaic parallel in system, at least to solve the MPPT of existing photovoltaic generating system
Design is not particularly suited for the technical problem of the photovoltaic parallel in system of hair electricity one.
One side according to embodiments of the present invention, there is provided a kind of photovoltaic parallel in system, including：Photovoltaic power generation equipment,
For exporting direct current power；Bi-directional inverter, it is connected between above-mentioned photovoltaic power generation equipment and AC network, wherein, above-mentioned light
Volt generating equipment corresponds to the DC terminal of above-mentioned bi-directional inverter, and above-mentioned AC network corresponds to the exchange end of above-mentioned bi-directional inverter；
Inverter, it is connected between above-mentioned photovoltaic power generation equipment and AC load, wherein, above-mentioned photovoltaic power generation equipment corresponds to above-mentioned inversion
The DC terminal of device, above-mentioned AC load correspond to the exchange end of above-mentioned inverter；First detection device, it is arranged on above-mentioned photovoltaic generation
Between equipment and above-mentioned bi-directional inverter, at least it is used for the output parameter for detecting above-mentioned photovoltaic power generation equipment；Second detection device,
It is arranged between above-mentioned AC network and above-mentioned bi-directional inverter, is at least used for the synchronization parameter for detecting above-mentioned AC network；The
Three detection devices, it is arranged between above-mentioned AC load and above-mentioned inverter, is at least used for the matching for detecting above-mentioned AC load
Parameter；MPPT controller, above-mentioned first detection device of input end connection of above-mentioned MPPT controller, above-mentioned second detection are set
Standby and above-mentioned 3rd detection device, the output end of above-mentioned MPPT controller connect above-mentioned bi-directional inverter and above-mentioned inversion
Device, for the above-mentioned bi-directional inverter of state modulator according at least one of and/or above-mentioned inverter：Above-mentioned output parameter,
Above-mentioned synchronization parameter, above-mentioned match parameter.
Preferably, above-mentioned MPPT controller is used for according to above-mentioned AC network, above-mentioned AC load and above-mentioned photovoltaic generation
If annexation between switches to control model corresponding with above-mentioned annexation in multiple control models.
Preferably, above-mentioned photovoltaic parallel in system also includes：Switching device, it is connected to above-mentioned AC network, above-mentioned exchange is born
Carry between above-mentioned photovoltaic power generation equipment, when above-mentioned switching device is in any state in multiple states, above-mentioned connection is closed
System switches to annexation corresponding with any of the above-described state.
Preferably, when above-mentioned switching device is in the first state in above-mentioned multiple states, above-mentioned photovoltaic power generation equipment
The connection with above-mentioned AC network and above-mentioned AC load is disconnected, above-mentioned MPPT controller is switched in above-mentioned multiple control models
Idle mode；And/or when above-mentioned switching device is in the second state in above-mentioned multiple states, above-mentioned AC load is broken
The connection with above-mentioned photovoltaic power generation equipment and above-mentioned AC network is opened, above-mentioned MPPT controller switches to above-mentioned multiple control moulds
Power generation mode in formula, for controlling above-mentioned bi-directional inverter according to above-mentioned output parameter and above-mentioned synchronization parameter；And/or
When above-mentioned switching device is in the third state in above-mentioned multiple states, above-mentioned AC network disconnects and above-mentioned photovoltaic power generation equipment
And the connection of above-mentioned AC load, the load model that above-mentioned MPPT controller is switched in above-mentioned multiple control models, it is used for
Above-mentioned inverter is controlled according to above-mentioned output parameter and above-mentioned match parameter；And/or it is in above-mentioned multiple in above-mentioned switching device
During four state in state, above-mentioned photovoltaic power generation equipment connects above-mentioned AC network by above-mentioned bi-directional inverter and passed through
Above-mentioned inverter connects above-mentioned AC load, the load generating mould that above-mentioned MPPT controller is switched in above-mentioned multiple control models
Formula or load power mode, wherein, under above-mentioned load power generation mode, above-mentioned MPPT controller is used to be joined according to above-mentioned output
Several, above-mentioned synchronization parameter and above-mentioned match parameter control above-mentioned bi-directional inverter and/or above-mentioned inverter, and/or, above-mentioned negative
Under load power mode, above-mentioned MPPT controller is used to control the above-mentioned two-way change of current according to above-mentioned output parameter and above-mentioned match parameter
Device and/or above-mentioned inverter.
Preferably, above-mentioned switching device includes at least one of：First switch device, it is connected to above-mentioned photovoltaic generation and sets
It is standby between dc bus, transmission line of the above-mentioned dc bus between above-mentioned bi-directional inverter and above-mentioned inverter；Second opens
Close device, be connected between above-mentioned photovoltaic power generation equipment and above-mentioned AC network, and above-mentioned second switch device be arranged on it is above-mentioned
On dc bus；3rd switching device, it is connected between above-mentioned photovoltaic power generation equipment and above-mentioned AC load, and the above-mentioned 3rd opens
Device is closed to be arranged on above-mentioned dc bus.
Preferably, above-mentioned photovoltaic parallel in system also includes：Mode controller, connect above-mentioned switching device and above-mentioned MPPT controls
Device processed, above-mentioned mode controller is used to control above-mentioned switching device between above-mentioned multiple states to switch, and controls above-mentioned MPPT
Controller switches to control model corresponding with above-mentioned annexation.
Preferably, above-mentioned mode controller is used for the capacity according to the above-mentioned photovoltaic power generation equipment detected, above-mentioned exchange
The above-mentioned switching device of the volume controlled of the capacity of power network and above-mentioned AC load.
Preferably, above-mentioned photovoltaic parallel in system also includes：4th detection device, is arranged on dc bus, above-mentioned direct current
Transmission line of the bus between above-mentioned bi-directional inverter and above-mentioned inverter, above-mentioned 4th detection device connect above-mentioned input
Portion, wherein, above-mentioned MPPT controller is used to be joined according to above-mentioned output parameter, and/or above-mentioned synchronization parameter, and/or above-mentioned matching
Number and above-mentioned 4th detection device are in the above-mentioned two-way change of current of the voltage detected by corresponding test point and/or current control
Device and/or above-mentioned inverter.
Preferably, above-mentioned MPPT controller be used for by the signal of one below control above-mentioned bi-directional inverter and/or
State inverter：Voltage signal, current signal, pulse-width signal.
Preferably, it is characterised in that above-mentioned photovoltaic power generation equipment includes：Photovoltaic cell, joining unit and power supply unit；
And/or above-mentioned AC load includes air conditioner；And/or it is connected to the biography between above-mentioned AC network and above-mentioned bi-directional inverter
Defeated line is three-phase power transmission line or Monophase electric power transmission line；And/or be connected to above-mentioned AC load and above-mentioned inverter it
Between transmission line be three-phase power transmission line or Monophase electric power transmission line.
First, in embodiments of the present invention, it is proposed that a kind of new framework of the electric power system of hair electricity one, be applied to
The photovoltaic parallel in system of the framework can include being connected in turn bi-directional inverter between AC network and AC load and inverse
Become device and the photovoltaic power generation equipment that is connected between bi-directional inverter and inverter, wherein, the photovoltaic power generation equipment can be
One lateral power network conveying electric energy, in another lateral AC load conveying electric energy, the AC network can be sent out from photovoltaic on the one hand
Electric equipment draws electric energy, can be powered on the other hand to AC load, which forms the system of a hair electricity one, and
And because photovoltaic power generation equipment can be directly to AC load energy regenerative, therefore the straight drive that can improve its caused electric energy utilizes
Rate.
Further, in embodiments of the present invention, the input end of MPPT controller can be with corresponding respectively to photovoltaic hair
Electric equipment, the first detection device of AC network and AC load, the second detection device and the connection of the 3rd detection device, with
The relevant parameters such as the voltage fed back in corresponding test point, electric current, power are obtained, so as to which the MPPT controller can root
According to the output of one or more of these detection devices, namely respectively photovoltaic power generation equipment side, AC network side with
And one or more of relevant parameter for being gathered of AC load side is realized to the effective of bi-directional inverter and/or adverse current device
Control, and then more excellent power supplying efficiency, it is not particularly suited for so as to solve the MPPT of existing photovoltaic generating system designs
The technical problem of the photovoltaic parallel in system of hair electricity one.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is a kind of schematic diagram of optional photovoltaic parallel in system according to embodiments of the present invention；
Fig. 2 is the schematic diagram according to a kind of MPPT control programs of prior art；
Fig. 3 is the schematic diagram of the optional photovoltaic parallel in system of another kind according to embodiments of the present invention.
Embodiment
Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that do not conflicting
In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
Embodiment 1
According to embodiments of the present invention, there is provided a kind of photovoltaic parallel in system, as shown in figure 1, the equipment includes：
1) photovoltaic power generation equipment 102, for exporting direct current power；
2) bi-directional inverter 104, it is connected between photovoltaic power generation equipment 102 and AC network 106, wherein, photovoltaic generation
The DC terminal of the corresponding bi-directional inverter 104 of equipment 102, the exchange end of the corresponding bi-directional inverter 104 of AC network 106；
3) inverter 108, it is connected between photovoltaic power generation equipment 102 and AC load 110, wherein, photovoltaic power generation equipment
The DC terminal of 102 corresponding inverters 108, the exchange end of the corresponding inverter 108 of AC load 110；
4) the first detection device 112, it is arranged between photovoltaic power generation equipment 102 and bi-directional inverter 104, is at least used to examine
Survey the output parameter of photovoltaic power generation equipment 102；
5) the second detection device 114, it is arranged between AC network 106 and bi-directional inverter 104, is at least used to detect and hands over
Flow the synchronization parameter of power network 106；
6) the 3rd detection device 116, it is arranged between AC load 110 and inverter 108, is at least used to detect to exchange and bears
Carry 110 match parameter；
7) MPPT controller 118, the input end of MPPT controller 118 connect the detection of the first detection device 112, second and set
Standby 114 and the 3rd detection device 116, the output end connection bi-directional inverter 104 and inverter of MPPT controller 118
108, for controlling bi-directional inverter 104 and/or inverter according to output parameter, and/or synchronization parameter, and/or match parameter
108。
It will be clear that one of technical solution of the present invention problem to be solved is to provide a kind of grid-connected system, with reality
Existing photovoltaic power generation equipment 102 is to the grid-connected of AC network 106, that is, the electric energy that can be provided the photovoltaic power generation equipment 102
More efficiently it is imported into AC network 106, and AC network 106 is effectively dispatched these electric energy, and then improves
The power supply capacity of AC network 106.
To solve the above problems, the photovoltaic parallel in system provided according to embodiments of the present invention, is different from and leads in the prior art
The inverter being connected to used by often between photovoltaic power generation equipment 102 and AC network 106, in embodiments of the present invention,
Bi-directional inverter 104 can be connected between photovoltaic power generation equipment 102 and AC network 106, so as to two-way be changed by this
Stream device 104 realizes supply of the electric energy to power network, specifically, can show as the lifting of output power, wherein, this alternative
Played a part of to elaborate in embodiment afterwards.
Specifically, in embodiments of the present invention, the photovoltaic power generation equipment 102 can generally include photovoltaic cell, conflux list
Member and power supply unit, wherein, photovoltaic cell is used to solar energy being converted directly into electric energy, for example can use conventional silicon photoelectricity
Pond etc., joining unit plays the effect of collecting to electric energy caused by photovoltaic battery array, for example can use conventional header box,
Power supply unit is used for DC distribution, can also use conventional power distribution cabinet etc., but this is not limited by the present invention.
Further, to make the AC energy and alternating current that photovoltaic power generation equipment 102 is provided by bi-directional inverter 104
The electric energy of net 106 reaches synchronous, and photovoltaic power generation equipment 102 is reached more excellent power output point, in some realities of the present invention
Apply in example, can be realized by the way of MPPT controller 118 is controlled to bi-directional inverter 104 to photovoltaic power generation equipment
102 modulation to the electric energy of the feedback of AC network 106, and then realize the lifting to grid connection efficiency.
In embodiments of the present invention, the input parameter of MPPT controller 118 can come from above-mentioned first detection device
112 and second detection device 114 output, wherein, the output of the first detection device 112 can be first detection device 112
Detected electrical parameter, is designated as output parameter near the output end of its test point namely photovoltaic power generation equipment 102, the
The output of two detection devices 114 can be second detection device 114 in its test point namely the incoming end of AC network 106
The detected electrical parameter comprised at least including synchronization parameter nearby, the synchronization parameter are used for photovoltaic and transmitted electricity between power network
It is synchronous to reach more excellent energy regenerative efficiency, wherein, above-mentioned electrical parameter both can be voltage or electric current, can be with
It is that power that detection device is drawn on this basis etc. is provided or drawn with photovoltaic power generation equipment 102 and/or AC network 106
The related parameter of electric energy, accordingly, the detection device 114 of the first detection device 112 and second can include voltage sensor
And/or current sensor etc., wherein, specifically, the specific manifestation form of the electrical parameter fed back by these detection devices can be with
It is the electric signal of these detection devices output, and then MPPT controller 118 can be by the input that is connected with these detection devices
Realize the collection to these electrical parameters in end.More specifically, in embodiments of the present invention, the input of MPPT controller 118
Portion can be the terminal block for comprising at least three connection ends, wherein, these three connection ends can connect the first detection device respectively
112nd, the second detection device 114 and the 3rd detection device 116, the 3rd detection device 116 are arranged on AC load 110, and it has
The working method of body is similar with the first detection device 112 and the second detection device 114, and the present invention does not make tired state herein.
It is worth noting that, specific connection of the present invention to the internal structure of above three detection device and its in the line
Mode is not limited in any way, for example, in embodiments of the present invention, the current sensor in these detection devices can be connected on
Electromagnetic current transducer or Hall sensor in circuit etc. is detected, wherein, the specific implementation of these detection devices
The implementation and its realization of technique effect that mode can't be to technical solution of the present invention impact, and also should not be construed as to this hair
Bright restriction.
Similarly, in embodiments of the present invention, the specific implementation of MPPT controller 118 can also be used and is similar to now
Have and be used for the circuit or device of realizing above-mentioned control function present in technology, for example, a kind of be typically used for what MPPT was controlled
Three close-loop control structure can be with as shown in Fig. 2 wherein, the input parameter of the MPPT controller 118 can be in photovoltaic power generation equipment
The voltage and current that 102 sides are gathered and the voltage gathered in the side of AC network 106 as synchronizing signal and/or
Electric current, its output parameter can be the pulsewidth modulations for controlling DC/DC converters and DC/AC converters in inverter 202
Signal, so as to which the MPPT can be according to synchronous situation to pulse-width signal, such as its dutycycle is adjusted, and then realize pair
The regulation of exchange output caused by inverter 202.Certainly, it is a kind of example above, this is not limited by the present invention, example
Such as, in some embodiments of the invention, the output of MPPT controller 118 can also be not limited to the form of pulse, such as can be with
The defeated of pair inverter 202 being connected with photovoltaic power generation equipment 102 is realized by analog signals such as voltage signal or current signals
The control gone out, that is, in embodiments of the present invention, MPPT controller 118 controls bi-directional inverter by the signal of one below
104 and/or inverter 108：Voltage signal, current signal, pulse-width signal.In addition, the MPPT controller 118 is to maximum work
The tracking of rate point can be combined with the control logic of writing controller chip to realize, for example pass through output voltage and/or electric current
Amplitude and/or the scanning of phase realize the dynamic of maximum power point tracked, etc..It should be appreciated that the present invention's is above-mentioned
Embodiment is regarded as within protection scope of the present invention.
Pass through the technical scheme described in above-described embodiment, it is possible to achieve photovoltaic power generation equipment 102 has to AC network 106
Imitate it is grid-connected, wherein, the framework that such scheme similarly to the prior art is provided may be summarized to be photovoltaic power generation equipment 102 to friendship
Stream power network 106 is powered, and then the AC network 106 after dilatation goes to connect each AC load 110 again.In traditional electricity generation system
In, this framework can reach ideal power supplying efficiency, but in the system of hair electricity one, because photovoltaic generation is set
Standby 102 load can not be approximately merely power network, it is also necessary to consider influence of the backend load to its power supplying efficiency, this just makes
Obtaining traditional MPPT designs can not meet have in the system of the increasingly complex hair electricity one of influence factor to transverter
Effect is controlled to reach the design requirement of more excellent power supplying efficiency.
For this problem, in embodiments of the present invention, a kind of new framework, specifically, above-mentioned photovoltaic first proposed
Grid-connected system can also include AC load 110, wherein, can be between above-mentioned photovoltaic power generation equipment 102 and AC load 110
Inverter 108 is connected with, so as to which photovoltaic power generation equipment 102 can be born in a lateral power network conveying electric energy in another lateral exchange
110 conveying electric energy are carried, which forms the system of a hair electricity one, and because photovoltaic power generation equipment 102 can be direct
To the energy regenerative of AC load 110, therefore the straight drive utilization rate of its caused electric energy can be improved.Further, of the invention real
Apply in example, the input end of MPPT controller 118 can also be set with the 3rd detection of the incoming end for being arranged on the AC load 110
Standby 116 connection, to gather the electrical parameters such as the voltage related to AC load 110, electric current, power, for reflecting AC load
110 with the match condition of photovoltaic power supply equipment and AC network 106, match parameter is designated as, so as to which the MPPT controller 118 can be with
According to the output of one or more of these detection devices, namely respectively in the side of photovoltaic power generation equipment 102, AC network
One or more of electrical parameter that 106 sides and the side of AC load 110 are gathered is realized to bi-directional inverter 104
And/or effective control of adverse current device, and then more excellent power supplying efficiency.
On the basis of above description, further to realize the more efficiently control of the system to hair electricity one,
Switching device is provided in the above-mentioned photovoltaic parallel in system provided according to embodiments of the present invention, and then can be cut by this
Changing device realizes switching of the system of hair electricity one between different application models, to reach in photovoltaic power generation equipment 102
Capacity, the purpose that is flexibly matched between the capacity of AC network 106 and the capacity of AC load 110, wherein, this is cut
Changing device can be connected between AC network 106, AC load 110 and photovoltaic power generation equipment 102, be in more in switching device
During any state in individual state, the annexation between AC network 106, AC load 110 and photovoltaic power generation equipment 102 can
To switch to annexation corresponding with any state.On the other hand, MPPT controller 118 can also coordinate switching device to hold
Row control strategy corresponding with application model, so as to reach more excellent power supplying efficiency, that is, in embodiments of the present invention,
Above-mentioned MPPT controller 118 can be also used for according between AC network 106, AC load 110 and photovoltaic power generation equipment 102
Annexation switches to control model corresponding with annexation in multiple control models.For example, as a kind of feasible implementation
Mode, in embodiments of the present invention, above-mentioned photovoltaic parallel in system can include：
1) switching device, it is connected between AC network 106, AC load 110 and photovoltaic power generation equipment 102；
Wherein,
When switching device is in the first state in multiple states, photovoltaic power generation equipment 102 disconnects and AC network 106
The idle mode that can be switched in multiple control models with the connection of AC load 110, MPPT controller 118；And/or
When switching device is in the second state in multiple states, AC load 110 disconnects and photovoltaic power generation equipment 102
And the connection of AC network 106, the power generation mode that MPPT controller 118 can be switched in multiple control models, for root
According to output parameter and synchronization parameter control bi-directional inverter 104；And/or
When switching device is in the third state in multiple states, AC network 106 disconnects and photovoltaic power generation equipment 102
And the connection of AC load 110, the load model that MPPT controller 118 can be switched in multiple control models, for root
According to output parameter and match parameter control inverter 108；And/or
When switching device is in four state in multiple states, photovoltaic power generation equipment 102 passes through bi-directional inverter 104
Connect AC network 106 and AC load 110 is connected by inverter 108, MPPT controller 118 can switch to multiple controls
Load power generation mode or load power mode in molding formula, wherein,
In the case where loading power generation mode, MPPT controller 118 is used to be controlled according to output parameter, synchronization parameter and match parameter
Bi-directional inverter 104 and/or inverter 108, and/or, under load power mode, MPPT controller 118 is used for according to output
Parameter and match parameter control bi-directional inverter 104 and/or inverter 108.
In embodiments of the present invention, when switching device is in first state, AC network 106 is logical with AC load 110
Cross bi-directional inverter 104 and inverter 108 connects, wherein, electric energy can first pass through the bi-directional inverter 104 and is converted to by exchange
Direct current, and then direct current is converted to by exchange by inverter 108, it is two-way to change under this scene to supply AC load 110
Device 104 is flowed to work as rectifier.Wherein, photovoltaic power generation equipment 102 disconnects with AC network 106 and AC load 110, hands over
Power supply of the burden to AC load 110 completely of power network 106 is flowed, photovoltaic power generation equipment 102 does not export electric energy, therefore only needs to consider
Matching between the characteristic of AC load 110 and AC network 106, without playing MPPT controller 118 to photovoltaic power generation equipment
The adjustment effect of 102 power supplying efficiency, MPPT controller 118 can be operated in holding state Light Condition in other words.
When switching device is in the second state, photovoltaic power generation equipment 102 connects AC network by bi-directional inverter 104
106, wherein, electric energy can be converted to exchange by the bi-directional inverter 104 by direct current, with realize photovoltaic power generation equipment 102 to
The energy regenerative of AC network 106, under this scene, bi-directional inverter 104 works as inverter 108.Wherein, AC load
110 are disconnected with photovoltaic power generation equipment 102 and AC network 106, and the not electricity consumption of AC load 110, photovoltaic power generation equipment 102 is produced
Raw electric energy is imported into AC network 106 completely, therefore only needs to consider that photovoltaic power generation equipment 102 is synchronous with AC network 106
And the maximization of power supplying efficiency, so as to which MPPT controller 118 can be operated in traditional mode power generation mode in other words, wherein,
MPPT control parameter is the output parameter and synchronized parameter of photovoltaic power generation equipment 102, namely the first detection device 112
With the output of the second detection device 114.
When switching device is in the second state, photovoltaic power generation equipment 102 connects AC network 106 by inverter 108,
Wherein, electric energy can be converted to exchange by the inverter 108 by direct current, to realize photovoltaic power generation equipment 102 to AC load
110 power supply.Wherein, AC network 106 disconnects with photovoltaic power generation equipment 102 and AC load 110, and AC network 106 was both
Electric energy is not imported from photovoltaic power generation equipment 102, also do not powered to AC load 110, electric energy caused by photovoltaic power generation equipment 102
It is entirely used for driving AC load 110, therefore only needs to consider photovoltaic power generation equipment 102 and the matching of AC load 110, so as to
MPPT controller 118 can be operated in load model, wherein, MPPT control parameter is joined for the output of photovoltaic power generation equipment 102
The match parameter of number and AC load, namely the output of the first detection device 112 and the 3rd detection device 116.
When switching device is in four states, photovoltaic power generation equipment 102 connects AC network by bi-directional inverter 104
106 and AC load 110 is connected by inverter 108, this annexation correspond to hair electricity one two kinds of system should
Use pattern：1) load power mode, the capacity of DC power generation system are less than the capacity of AC load 110, and AC network 106 also needs
To be powered to AC load 110, bi-directional inverter 104 works as rectifier；2) power generation mode is loaded, DC power generation system
Capacity is more than the capacity of AC load 110, and electric energy caused by the DC power generation system can part supply AC load
110, another part is imported into AC network 106, and bi-directional inverter 104 works as inverter 108.Accordingly, MPPT is controlled
The mode of operation of device 118 can also be corresponding with above two pattern：1) under load power mode, due to photovoltaic power generation equipment
102 not to the energy regenerative of AC network 106, therefore the output parameter of the photovoltaic power generation equipment 102 need not be synchronous with AC network 106,
But still need to ensure the matching of photovoltaic power generation equipment 102 and AC load 110, wherein, MPPT control parameter can be photovoltaic
The match parameter of output and the load of generating equipment 102, namely the first detection device 112 and the 3rd detection device 116 are defeated
Go out；2) in the case where loading power generation mode, because photovoltaic power generation equipment 102 is also needed to exchange while AC load 110 are supplied
The energy regenerative of power network 106, therefore the target of MPPT controls not only needs the matching of the photovoltaic power generation equipment 102 and AC network 106, gone back
The matching of the photovoltaic power generation equipment 102 and AC load 110 is needed, can be set so as to MPPT control parameter including photovoltaic generation
Standby 102 output, the relevant parameter of AC network 106 and the relevant parameter of AC load 110, namely the first to the 3rd inspection
The output of measurement equipment 116.
By the switching device in above-mentioned photovoltaic parallel in system, can cause hair electricity one system be operated in one or
Under multiple patterns.More specifically, in embodiments of the present invention, above-mentioned switching device can have a variety of implementations, wherein, most base
Local, the switching device can be realized by switching device, such as shown in Fig. 3, the switching device can include it is following at least
One of：
1) first switch device 302, it is connected between photovoltaic power generation equipment 102 and dc bus, dc bus is two-way
Transmission line between transverter 104 and inverter 108；
2) second switch device 304, it is connected between photovoltaic power generation equipment 102 and AC network 106, and second switch device
Part 304 is arranged on dc bus；
3) the 3rd switching device 306, it is connected between photovoltaic power generation equipment 102 and AC load 110, and the 3rd derailing switch
Part 306 is arranged on dc bus.
Wherein, first switch device 302, the switching device 306 of second switch device 304 and the 3rd correspond respectively to above-mentioned light
Photovoltaic power generation equipment 102, AC network 106 and the AC load 110 in grid-connected system are lied prostrate, so as in first switch device 302
During disconnection, photovoltaic power generation equipment 102 disconnects, and switching device can be to switch to above-mentioned first state, in second switch device
When part 304 disconnects, AC network 106 disconnects, and switching device can be to switch to the third state, in the 3rd switching device
306 when disconnecting, and AC load 110 disconnects, and switching device can be to switch to the second state.More specifically, these are switched
Device both can be the semiconductor switch such as the IGBT driven by push-pull amplifier, can also include by the high-power of chip controls
Such as relay, contactor are switched, the present invention is not limited in any way to this.
It is worth noting that, realize that above-mentioned switching device is not by one or more of above three switching device
It is the unique embodiment of the present invention, also should not be construed as constituting the present invention restriction, for example, in some implementation of the present invention
In example, above three switching device may be formed as one, for example be substituted by a selecting switch or selector, etc..Should
When understanding, the equivalent or obvious modification of such embodiment of the present invention is regarded as within protection scope of the present invention.
Further, to reduce the power consumption of the first to the 3rd detection device 116 and/or MPPT controller 118, in the present invention
In embodiment, above-mentioned photovoltaic parallel in system can also include at least one of：
1) the 4th switching device, one end connection input end, the other end are used to connect the first detection device 112；
2) the 5th switching device, one end connection input end, the other end are used to connect the second detection device 114；
3) the 6th switching device, one end connection input end, the other end are used to connect the 3rd detection device 116.
Wherein, can be under a certain state and pattern by corresponding detection device and MPPT by the 4th to the 6th switch
The input end connection of controller 118, this aspect can save energy consumption, on the other hand can also be by cutting off unnecessary letter
Number transmission line is to the electric one of hair so as to realize to reduce the interference of the signal transmssion line to the electrical parameter needed for transmitting
The further optimization of system.
Further, in embodiments of the present invention, above-mentioned photovoltaic parallel in system can also include：
1) mode controller, connection switching apparatus and MPPT controller 118, mode controller are used to control switching device to exist
Switch between multiple states, and control MPPT controller 118 to switch to and AC network 106, AC load 110 and photovoltaic generation
Control model corresponding to annexation between equipment 102.
In general, in embodiments of the present invention, mode controller can use setting for control loop combination power component
Meter, but this is not limited by the present invention, wherein, the mode controller both can be each independent with MPPT controller 118, also may be used
It is integrated with being formed, for example an integrated manipulator can be used as to occur, wherein, the integrated manipulator can also include two-stage control
Loop processed.Specifically, for previous embodiment, mode controller can be controlled to the first to the 3rd switching device,
Further, the mode controller can also control the 4th to the 6th switch in the lump, and this depends on the specific embodiment party of the present invention
To the requirement of control integrated level in formula, this is not limited by the present invention.More specifically, in embodiments of the present invention, Schema control
Device can be according to the appearance of the capacity of the photovoltaic power generation equipment 102 detected, the capacity of AC network 106 and AC load 110
Amount control switching device, for example, can be maximized the efficiency of photovoltaic power generation equipment 102 according to photovoltaic priority principle, but this
Invention is not construed as limiting to this.
On the basis of above description, it is connected in the framework for further considering to provide according to embodiments of the present invention double
DC link between transverter 104 and inverter 108, institute on the dc bus of shunting or effect of confluxing is played in other words
The stable electric power requirement of transmission, in embodiments of the present invention, above-mentioned photovoltaic parallel in system can also include：
1) the 4th detection device, be arranged on dc bus, dc bus be bi-directional inverter 104 and inverter 108 it
Between transmission line, the 4th detection device connection input end, wherein, MPPT controller 118 be used for according to output parameter, and/or
Synchronization parameter, and/or match parameter and the 4th detection device are in the voltage and/or electric current detected by corresponding test point
Control bi-directional inverter 104 and/or inverter 108.
In embodiments of the present invention, controlled as the electrical parameter on the dc bus of MPPT control targes and the MPPT
Other foregoing input parameters of device 118 can be simultaneously from one or more of first to fourth detection device, and it is controlled
Object processed can be still bi-directional inverter 104 and/or inverter 108, wherein, specific control strategy can generally use shape
The control mode of state space, but this is not limited by the present invention.
By above-described embodiment, technical solution of the present invention and its operation principle are set forth, however it is noticeable
It is that above-described embodiment is only used for the understanding to technical solution of the present invention, any unnecessary restriction can't be formed to the present invention,
For example, Fig. 3 gives a kind of feasible annexation of the first to the 3rd switching device, but in other implementations of the present invention
In example, the switching device 306 of second switch device 304 and the 3rd can also be separately positioned on input/output port and inverter 108
Outside, etc..
Need further exist for explanation, in embodiments of the present invention, connecting line in Fig. 1 and Fig. 3 only as each device it
Between annexation a kind of signal, be not meant in the embodiment of the present invention transmission corresponding to these connecting lines
Line is only limitted to one, specifically, in embodiments of the present invention, be connected between AC network 106 and bi-directional inverter 104, with
And the transmission line being connected between AC load 110 and inverter 108 can be three-phase power transmission line, and it is connected to two-way change
Between stream device 104 and adverse current device and to be connected to the two transmission line between photovoltaic power generation equipment 102 can be direct current transmission
Line.Certainly, this is a kind of example, in some embodiments of the invention, is connected to AC network 106 and bi-directional inverter
Between 104 and the transmission line that is connected between AC load 110 and inverter 108 can also be Monophase electric power transmission line etc.
The carrier of other AC power transmissions, this is not limited by the present invention.
In addition, in embodiments of the present invention, the concrete form of AC load 110 can have a variety of, and it can be considered as expression
The entirety for the load being connected in photovoltaic parallel in system, and a certain specific type is not limited to, wherein, in laod network
Multiple AC loads 110 or sub-network can be connected with, its specific topological structure can have a variety of, and this can be according to photovoltaic
Depending on the concrete application of grid-connected system, for example, for PV air-conditioner network, its load driven can include air-conditioning
Machine, such as centrifugal compressor of the power-equipment inside air conditioner etc. in other words, this has no effect on the implementation of technical solution of the present invention
And its realization of technique effect, the present invention are not also limited in any way to this.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
- A kind of 1. photovoltaic parallel in system, it is characterised in that including：Photovoltaic power generation equipment, for exporting direct current power；Bi-directional inverter, it is connected between the photovoltaic power generation equipment and AC network, wherein, the photovoltaic power generation equipment is corresponding The DC terminal of the bi-directional inverter, the AC network correspond to the exchange end of the bi-directional inverter；Inverter, it is connected between the photovoltaic power generation equipment and AC load, wherein, described in the photovoltaic power generation equipment correspondence The DC terminal of inverter, the AC load correspond to the exchange end of the inverter；First detection device, it is arranged between the photovoltaic power generation equipment and the bi-directional inverter, it is at least described for detecting The output parameter of photovoltaic power generation equipment；Second detection device, it is arranged between the AC network and the bi-directional inverter, is at least used to detect the exchange The synchronization parameter of power network；3rd detection device, it is arranged between the AC load and the inverter, is at least used to detect the AC load Match parameter；MPPT controller, the input end of the MPPT controller connect first detection device, second detection device, And the 3rd detection device, the output end of the MPPT controller connect the bi-directional inverter and the inverter, For bi-directional inverter described in the state modulator according at least one of and/or the inverter：It is the output parameter, described Synchronization parameter, the match parameter.
- 2. photovoltaic parallel in system according to claim 1, it is characterised in that the MPPT controller is used for according to the friendship Stream power network, the annexation between the AC load and the photovoltaic power generation equipment switch in multiple control models with it is described Control model corresponding to annexation.
- 3. photovoltaic parallel in system according to claim 2, it is characterised in that also include：Switching device, it is connected between the AC network, the AC load and the photovoltaic power generation equipment, in the switching When device is in any state in multiple states, the annexation switches to connection corresponding with any state and closed System.
- 4. photovoltaic parallel in system according to claim 3, it is characterised in thatWhen the switching device is in the first state in the multiple state, the photovoltaic power generation equipment disconnects and the friendship Flow the connection of power network and the AC load, the idle mode that the MPPT controller is switched in the multiple control model； And/orWhen the switching device is in the second state in the multiple state, the AC load disconnects to be sent out with the photovoltaic The connection of electric equipment and the AC network, the generating mould that the MPPT controller is switched in the multiple control model Formula, for controlling the bi-directional inverter according to the output parameter and the synchronization parameter；And/orWhen the switching device is in the third state in the multiple state, the AC network disconnects to be sent out with the photovoltaic The connection of electric equipment and the AC load, the load mould that the MPPT controller is switched in the multiple control model Formula, for controlling the inverter according to the output parameter and the match parameter；And/orWhen the switching device is in four state in the multiple state, the photovoltaic power generation equipment passes through described two-way Transverter connects the AC network and connects the AC load by the inverter, and the MPPT controller switches to Load power generation mode or load power mode in the multiple control model, wherein,Under the load power generation mode, the MPPT controller is used for according to the output parameter, the synchronization parameter and institute State match parameter and control the bi-directional inverter and/or the inverter, and/or, it is described under the load power mode MPPT controller is used to control the bi-directional inverter and/or the inversion according to the output parameter and the match parameter Device.
- 5. photovoltaic parallel in system according to claim 3, it is characterised in that the switching device include it is following at least it One：First switch device, it is connected between the photovoltaic power generation equipment and dc bus, the dc bus is described two-way Transmission line between transverter and the inverter；Second switch device, it is connected between the photovoltaic power generation equipment and the AC network, and the second switch device It is arranged on the dc bus；3rd switching device, it is connected between the photovoltaic power generation equipment and the AC load, and the 3rd switching device It is arranged on the dc bus.
- 6. photovoltaic parallel in system according to claim 3, it is characterised in that also include：Mode controller, connects the switching device and the MPPT controller, and the mode controller is used to control described cut Changing device switches between the multiple state, and controls the MPPT controller to switch to control corresponding with the annexation Molding formula.
- 7. photovoltaic parallel in system according to claim 6, it is characterised in that the mode controller is used for basis and detected The capacity of the photovoltaic power generation equipment, the capacity of the AC network and the AC load volume controlled described in cut Changing device.
- 8. photovoltaic parallel in system according to any one of claim 1 to 7, it is characterised in that also include：4th detection device, is arranged on dc bus, the dc bus be the bi-directional inverter and the inverter it Between transmission line, the 4th detection device connects the input end, wherein, the MPPT controller is used for according to described defeated Go out parameter, and/or the synchronization parameter, and/or the match parameter and the 4th detection device in corresponding test point Bi-directional inverter described in detected voltage and/or current control and/or the inverter.
- 9. photovoltaic parallel in system according to any one of claim 1 to 5, it is characterised in that the MPPT controller is used In the signal control bi-directional inverter by one below and/or the inverter：Voltage signal, current signal, pulsewidth Modulated signal.
- 10. photovoltaic parallel in system according to any one of claim 1 to 5, it is characterised in thatThe photovoltaic power generation equipment includes：Photovoltaic cell, joining unit and power supply unit；And/orThe AC load includes air conditioner；And/orThe transmission line being connected between the AC network and the bi-directional inverter is three-phase power transmission line or single-phase electricity Power transmission line；And/orThe transmission line being connected between the AC load and the inverter passes for three-phase power transmission line or Monophase electric power Defeated line.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281952A (en) * | 2018-02-10 | 2018-07-13 | 珠海格力电器股份有限公司 | Photovoltaic power supply system and its method for controlling power supply |
| CN115882516A (en) * | 2023-03-08 | 2023-03-31 | 杭州欣美成套电器制造有限公司 | Photovoltaic grid-connected control device and method for efficient photovoltaic charging control |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135225A (en) * | 2014-07-11 | 2014-11-05 | 珠海格力电器股份有限公司 | Photovoltaic inverter and air conditioner |
| CN106936156A (en) * | 2015-12-30 | 2017-07-07 | 中国科学院西安光学精密机械研究所 | A kind of photovoltaic power generation grid-connecting power supply control apparatus |
| CN108092316B (en) * | 2018-01-16 | 2020-05-08 | 博阳能源科技有限公司 | Modularized photovoltaic power generation system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841188A (en) * | 2010-02-08 | 2010-09-22 | 哈尔滨工业大学 | Hybrid power supply uninterruptible inverted power supply of power feedback type optical network |
| CN102088190A (en) * | 2009-12-03 | 2011-06-08 | 三星Sdi株式会社 | Grid-connected power storage system and method for controlling grid-connected power storage system |
| US20110140520A1 (en) * | 2009-12-16 | 2011-06-16 | Sung-Im Lee | Energy storage system and method of controlling the same |
| CN102931653A (en) * | 2012-11-02 | 2013-02-13 | 浙江工业大学 | Comprehensive coordination control method of wind-solar direct current micro-grid |
| CN203895990U (en) * | 2013-12-24 | 2014-10-22 | 珠海格力电器股份有限公司 | Photovoltaic grid-connected system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5081596B2 (en) * | 2007-12-04 | 2012-11-28 | シャープ株式会社 | Power supply system |
-
2013
- 2013-12-24 CN CN201710951923.9A patent/CN107658900B/en active Active
- 2013-12-24 CN CN201310728119.6A patent/CN104734181B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088190A (en) * | 2009-12-03 | 2011-06-08 | 三星Sdi株式会社 | Grid-connected power storage system and method for controlling grid-connected power storage system |
| US20110140520A1 (en) * | 2009-12-16 | 2011-06-16 | Sung-Im Lee | Energy storage system and method of controlling the same |
| CN101841188A (en) * | 2010-02-08 | 2010-09-22 | 哈尔滨工业大学 | Hybrid power supply uninterruptible inverted power supply of power feedback type optical network |
| CN102931653A (en) * | 2012-11-02 | 2013-02-13 | 浙江工业大学 | Comprehensive coordination control method of wind-solar direct current micro-grid |
| CN203895990U (en) * | 2013-12-24 | 2014-10-22 | 珠海格力电器股份有限公司 | Photovoltaic grid-connected system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281952A (en) * | 2018-02-10 | 2018-07-13 | 珠海格力电器股份有限公司 | Photovoltaic power supply system and its method for controlling power supply |
| CN108281952B (en) * | 2018-02-10 | 2024-04-16 | 珠海格力电器股份有限公司 | Photovoltaic power supply system and power supply control method thereof |
| CN115882516A (en) * | 2023-03-08 | 2023-03-31 | 杭州欣美成套电器制造有限公司 | Photovoltaic grid-connected control device and method for efficient photovoltaic charging control |
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| CN104734181A (en) | 2015-06-24 |
| CN107658900B (en) | 2020-12-22 |
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