CN105939022B - A kind of grid-connected off-network compatible switching system for photovoltaic generating system - Google Patents
A kind of grid-connected off-network compatible switching system for photovoltaic generating system Download PDFInfo
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- CN105939022B CN105939022B CN201610049721.0A CN201610049721A CN105939022B CN 105939022 B CN105939022 B CN 105939022B CN 201610049721 A CN201610049721 A CN 201610049721A CN 105939022 B CN105939022 B CN 105939022B
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- H02J3/383—
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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 present invention provides a kind of grid-connected off-network compatible switching system for photovoltaic generating system, which is made of photovoltaic module, gird-connected inverter, off-network inverter, DC/DC controllers, battery management unit, accumulator group, contactor, contactor auxiliary contact, intermediate relay, intermediate relay auxiliary contact, delay attracting electric relay, delay attracting electric relay auxiliary contact, miniature sinewave inverter, data acquisition transmission board, GPRS communication modules, miniature circuit breaker etc.；The present invention is when city is electrically accessed normal, automatically cascade photovoltaic module is converted into being suitable for pattern of generating electricity by way of merging two or more grid systems, after mains failure, automatically it converts thereof into suitable for off-network power generation mode, by introducing contactor dynamic circuit breaker auxiliary contact, time-delay relay etc., it ensure that provided net system switching process is smooth and reliable, which introduces data acquisition transmission board and GPRS communication modules, realizes the complete monitoring of system operating mode and working condition.
Description
Technical field
The present invention relates to a kind of grid-connected off-network compatible switching systems for photovoltaic generating system, belong to new energy and distribution
Formula photovoltaic generation application field.
Background technology
Environmental problem increasingly becomes an important factor for restricting social economy, life development, improves generation of electricity by new energy ratio
Have become social consensus to solve environmental problem, electricity generation system is built in user demand side, greatly kept away by distributed photovoltaic
Exempted from centralized photovoltaic generation power transmission and distribution it is difficult, it is with high costs caused by abandon optical issue.Distributed photovoltaic power generation system from from
Transmission losses is preferably minimized with, remaining electricity online pattern, improves photovoltaic energy utilization ratio, however, since social economy is sent out
Exhibition level differs, and the stability of some areas distributed photovoltaic power generation system grid connection point voltage is difficult to effective guarantee, necessarily causes
The significant wastage of distributed photovoltaic electric energy.
Unstable vast outlying district alternating current is objective truth, however these requirements of area to city's electrical stability are equally compeled
It cuts, for being in backwoodsman service provider, the unstable puzzlement brought of alternating current then becomes apparent,
Distributed photovoltaic power generation system is installed in above-mentioned outlying district, grid-connected off-network is taken into account as objective demand.Common solution
It is the grid-connected integrated inverter of off-network compatibility, but compares gird-connected inverter, the demand of general DC/DC controllers and industrialization
Level, the demand and industrialization level of the grid-connected integrated inverter of off-network compatibility are very little, it is caused to hold at high price,
Customer investment recycling is not within the foreseeable future.In addition to this, the integrated accumulator charging control of the grid-connected integrated inverter internal of off-network compatibility
The photovoltaic input voltage of device processed is far above accumulator battery voltage, caused switching component switching loss, fever, radiator volume
The problems such as increase, causes the rated output capacity of its storage battery charge controller being internally integrated to be far smaller than light under simultaneously net state
Lie prostrate component rated capacity, the 50% of photovoltaic module rated capacity under often insufficient and net state, photovoltaic waste of energy when leading to off-network
Seriously.
In order to improve photovoltaic generation utilization rate to greatest extent under off-network grid-connected conditions, while ensureing that system is stablized
Operation shortens customer investment payoff period, it is proposed that a kind of grid-connected off-network compatible switching system for photovoltaic generating system.This is
For system in normal be incorporated into the power networks, photovoltaic module is combined into series model to meet gird-connected inverter input voltage requirement, city automatically
After electricity power-off, photovoltaic module is combined into multigroup paralleling model automatically, to ensure that general DC/DC controllers input voltage is no more than most
Big limit value.In practical applications, user can arrange the basic configuration of the switching system according to actual demand, such as in communication base station
In power supply system, DC load is most important load, then in the power supply system of the type, can not have to configuration off-network inversion
Device can further save the construction cost of user.
Invention content
The present invention is directed to the problem of distributed photovoltaic power generation system, it is proposed that one kind being applied to photovoltaic generating system
Grid-connected off-network compatible switching system, main purpose is：It is generated electricity by general gird-connected inverter when alternating current is normal, improves user's power generation
Income；It is accumulator electric energy supplement by general DC/DC controllers when mains failure, user can flexibly select according to actual demand
It selects using direct current supply or realizes Alternating Current Power Supply by configuring off-network inverter.The present invention significance be by it is general simultaneously
Demands are larger, industrialization level is higher for net inverter, general DC/DC controllers, off-network inverter etc., scale cost is relatively low
Reference power supply equipment as accessory, by grid-connected off-network compatible switching unit organic assembling at grid-connected off-network compatible switching system
System can greatly reduce user's construction cost according to scale effect and minimum user demand equipping rules.Compared to grid-connected
The integrated inverter of off-network compatibility, is not only in that scale reduces construction cost, and substantially increases the off-network work time
The utilization rate for lying prostrate electric energy can further improve user's income, shorten the investment payback time.Grid-connected off-network compatibility involved in invention is cut
It changes system and uses modular arrangement scheme, and all working pattern being related to automatically switches, construction is simple, easy to maintain.
Specifically, the purpose of the present invention is achieved through the following technical solutions：
The present invention opens two by photovoltaic module, triple pole contactor, quadrupole contactor, two and closes quadrupole contactor, triple pole contactor
Coil, quadrupole contactor coil, two open two and close quadrupole contactor coil, delay attracting electric relay coil, delay attracting electric relay
Moving together contact, intermediate relay, intermediate relay moving together contact, intermediate relay break contact, quadrupole contactor dynamic circuit breaker auxiliary
Contact, triple pole contactor dynamic circuit breaker auxiliary contact, miniature sinewave inverter, miniature circuit breaker, GPRS communication modules, the contact of three poles
Device dynamic circuit connector auxiliary contact, quadrupole contactor dynamic circuit connector auxiliary contact, data acquisition transmission board, gird-connected inverter, accumulator group, off-network
Inverter, battery management unit, DC/DC controllers composition.In four groups of photovoltaic modulies the anode of each group of photovoltaic module with
An optional quadrupole contactor dynamic circuit connector main contacts is suitable for reading to be separately connected, and DC/ is linked into after the lower mouth short circuit of the quadrupole contactor
The electrode input end of DC controllers, the cathode of each group of photovoltaic module is dynamic with another quadrupole contactor in four groups of photovoltaic modulies
It closes that main contacts is suitable for reading is separately connected, the negative input of DC/DC controllers is linked into after the lower mouth short circuit of the quadrupole contactor.The
One dynamic circuit connector main contacts of an optional triple pole contactor of cathode series connection for one group of photovoltaic module is followed by second group of photovoltaic group
The anode of part, the cathode of second group of photovoltaic module connect the triple pole contactor another dynamic circuit connector main contacts after be linked into third group
The anode of photovoltaic module, the cathode of third group photovoltaic module connect the triple pole contactor the last one dynamic circuit connector main contacts after access
To the anode of the 4th group of photovoltaic module, the anode of first group of photovoltaic module is connected a dynamic circuit connector master of another triple pole contactor
Be linked into the positive input terminal of gird-connected inverter behind contact, the cathode of the 4th group of photovoltaic module connect the triple pole contactor other two
The negative input end of gird-connected inverter is linked into after dynamic circuit connector main contacts.
Under working condition, all dynamic circuit connector main contacts of triple pole contactor, which synchronize, to be attracted or disconnects, all dynamic circuit connectors of quadrupole contactor
Main contacts, which synchronizes, to be attracted or disconnects, and the dynamic circuit connector main contacts of triple pole contactor and quadrupole contactor cannot be inhaled simultaneously in synchronization
It closing, after triple pole contactor dynamic circuit connector main contacts disconnects a period of time, quadrupole contactor dynamic circuit connector main contacts could be normally attracted, similarly,
After quadrupole contactor dynamic circuit connector main contacts disconnects a period of time, triple pole contactor dynamic circuit connector main contacts could be normally attracted, the same time
On node, triple pole contactor dynamic circuit connector main contacts and all possible state of quadrupole contactor dynamic circuit connector main contacts include：Three poles contact
Device dynamic circuit connector main contacts disconnects, quadrupole contactor dynamic circuit connector main contacts disconnects；The disconnection of triple pole contactor dynamic circuit connector main contacts, quadrupole contactor
Dynamic circuit connector main contacts is closed；Quadrupole contactor dynamic circuit connector main contacts disconnects, triple pole contactor dynamic circuit connector main contacts is closed.
For ensure triple pole contactor, quadrupole contactor as specified above in rule be attracted or disconnect, triple pole contactor
Coil obtains electric or dead electricity simultaneously, and quadrupole contactor coil obtains electric or dead electricity simultaneously, but triple pole contactor coil and quadrupole contact
Device coil cannot simultaneously it is electric, on same timing node, triple pole contactor coil and quadrupole contactor coil are all possible
Electricity condition includes：Triple pole contactor coil losing electricity, quadrupole contactor coil dead electricity；Triple pole contactor coil losing electricity, quadrupole contact
Device coil obtains electric；Quadrupole contactor coil dead electricity, triple pole contactor coil obtain electric.
Electric or dead electricity, two triple pole contactor coils are obtained for the rule in ensureing triple pole contactor coil as specified above
Shorted on one end and being connected with one end of a delay attracting electric relay coil be connected afterwards with alternating current side miniature circuit breaker one end, two
After the other end short circuit of a triple pole contactor coil, touched successively with delay attracting electric relay moving together contact, intermediate relay dynamic circuit connector
Point, the series connection of two quadrupole contactor dynamic circuit breaker auxiliary contact are followed by the other end of alternating current side miniature circuit breaker, the delay be attracted after
The other end of electric apparatus coil is connected to intermediate relay moving together contact, delay attracting electric relay moving together contact series connection midpoint.
Electric or dead electricity, two quadrupole contactor coils are obtained for the rule in ensureing quadrupole contactor coil as specified above
Shorted on one end and the rear one end with the output of miniature sinewave inverter that is connected with one end of another delay attracting electric relay coil
It is connected, it is dynamic with the delay attracting electric relay moving together contact, intermediate relay successively after the other end short circuit of quadrupole contactor coil
The other end of miniature sinewave inverter output is connected to after disconnected contact, two triple pole contactor dynamic circuit breaker auxiliary contact series connection, it should
The other end of delay attracting electric relay coil is connected to intermediate relay moving together contact, delay attracting electric relay moving together contact series connection
Midpoint.
A kind of grid-connected off-network compatible switching system for photovoltaic generating system：When alternating current powers off, it is intermediate after
Electric appliance KA coil losing electricities, intermediate relay KA moving together contact disconnect, and intermediate relay KA break contacts are closed, intermediate relay KA
Moving together contact disconnection causes triple pole contactor KM1, KM2 coil, delay attracting electric relay KT2 coil power supplies circuit to disconnect, and lead
Delay attracting electric relay KT2 moving together contact, triple pole contactor KM1, KM2 dynamic circuit connector main contacts is caused to disconnect, related triple pole contactor
KM1, KM2 dynamic circuit breaker auxiliary contact are closed, and the connection of photovoltaic module and gird-connected inverter at this time is fully disconnected, simultaneously because it is intermediate after
Electric appliance KA break contacts, triple pole contactor KM1, KM2 dynamic circuit breaker auxiliary contact are closed so that delay attracting electric relay KT1 coils obtain
Electricity, delay attracting electric relay KT1 coils obtain after the electric time reaches preset time, and delay attracting electric relay KT1 moving together contact is closed
So that quadrupole contactor KM3, KM4 coil obtain it is electric so that quadrupole contactor KM3, KM4 is closed, photovoltaic module and be unified into four groups at this time and connect
Enter to DC/DC controllers；When city power recovery, intermediate relay KA coils obtain electric, intermediate relay KA break contacts disconnection, intermediate
Relay KA moving together contact is closed, and the disconnection of intermediate relay KA break contacts causes quadrupole contactor KM3, KM4 coil, delay to be inhaled
It closes relay KT1 coil power supplies circuit to disconnect, and makes delay attracting electric relay KT1 moving together contact, quadrupole contactor KM3, KM4
Dynamic circuit connector main contacts disconnects, and related quadrupole contactor KM3, KM4 dynamic circuit breaker auxiliary contact are closed, and photovoltaic module is controlled with DC/DC at this time
The connection of device is fully disconnected, simultaneously because the moving together contact of intermediate relay KA, quadrupole contactor KM3, KM4 dynamic circuit breaker auxiliary contact
It is closed so that delay attracting electric relay KT2 coils obtain electric, and delay attracting electric relay KT2 coils obtain the electric time and reach preset time
Afterwards, delay attracting electric relay KT2 moving together contact be closed so that triple pole contactor KM1, KM2 coil obtain it is electric make triple pole contactor KM1,
KM2 is closed, and photovoltaic module is connected into a group of access to gird-connected inverter at this time.
A kind of grid-connected off-network compatible switching system for photovoltaic generating system, data acquisition transmission board pass through
RS485 buses acquire the operation data information of gird-connected inverter, DC/DC controllers etc., and data acquire transmission board and pass through detection three
The operating mode of pole contactor dynamic circuit connector auxiliary contact, the quadrupole contactor dynamic circuit connector auxiliary contact state information acquisition switching system,
Data acquire transmission board with GPRS module by RS232 bus communications, by collected data information and the work of the switching system
Operation mode uploads to far-end server by GPRS communication modes and is inquired for user, and battery management unit provides accumulator group and fills
The basic management function of electric discharge, the output of the input connection DC/DC controllers of battery management unit, battery management unit
The power supply as direct current user is exported, and according to the difference of electricity consumption priority, it is inverse to be separately connected off-network inverter, miniature sine wave
The input for becoming device, while being connected to accumulator group, and the output of off-network inverter, which is connected to two, opens two and close quadrupole contactor
Dynamic circuit breaker main contacts is suitable for reading, and two open the two two dynamic circuit connector main contacts alternating current side miniature circuit breakers suitable for reading of being connected to for closing quadrupole contactor
Outlet side, two, which open two, closes quadrupole contactor coil also by the power supply of alternating current side miniature circuit breaker outlet side, and two, which open two, closes quadrupole contact
The lower mouth of device dynamic circuit connector main contacts is parallel to mouth under dynamic circuit breaker main contacts respectively, and when alternating current is normal, two, which open two, closes quadrupole contactor dynamic circuit connector
Main contacts is closed, and is exchange customer power supply by alternating current, and when mains failure, two, which open two, closes quadrupole contactor dynamic circuit breaker main contacts closure,
It is exchange customer power supply by off-network inverter.
Technical solution in invention is had the following advantages that compared with prior art and effect：
The present invention an effect be, demand is larger, the higher gird-connected inverter of industrialization, off-network inverter,
The power-supply devices such as DC/DC controllers greatly reduce photovoltaic as apolegamy part by the technical solution organic assembling in invention
The cost of electricity generation grid-connecting off-network compatible system.
Another effect of the present invention is, breaks through and commonly uses the integrated accumulator of grid-connected off-network integration inverter internal
The limitation of charge controller capacity so that when off-network works, the utilization rate of photovoltaic module capacity can reach 100%.
Another effect of the present invention is that user can select the minimal configuration of meet demand according to actual needs,
Configuration is flexible, and the degree of freedom of selection is high, is conducive to further decrease application cost.
Another effect of the present invention is, for accessories such as gird-connected inverter, DC/DC controllers in system, no
Mandatory requirement input, output isolation, increase the optional range of power-supply device accessory.
Description of the drawings
Fig. 1 is the grid-connected off-network compatible switching system block diagram for photovoltaic generating system；
Fig. 2 is main circuit contactor break-make sequence diagram；
Fig. 3 is that main circuit contactor coil obtains electric, dead electricity sequence diagram；
Fig. 4 stops the on off operating mode of intermediate, time relay contact and contactor auxiliary contact during telegram in reply；
Fig. 5 meets the grid-connected off-network compatible switching system minimal configuration block diagram of communication base station DC load；
Specific implementation mode
Embodiment one：
A kind of grid-connected off-network applied to photovoltaic generating system is compatible with electricity generation system：Photovoltaic module（100、101、
102、103）, triple pole contactor（104、105）, quadrupole contactor（106、107）, two open two close quadrupole contactor 136, three poles connect
Tentaculum coil（108、109）, quadrupole contactor coil（118、119）, two open two close quadrupole contactor coil 135, delay be attracted
Relay coil（115、125）, delay attracting electric relay moving together contact（110、120）, intermediate relay 117, intermediate relay
Moving together contact 111, intermediate relay break contact 121, quadrupole contactor dynamic circuit breaker auxiliary contact（112、114）, triple pole contactor
Dynamic circuit breaker auxiliary contact（122、124）, miniature sinewave inverter 116, miniature circuit breaker（126、131）, GPRS communication modules
127, triple pole contactor dynamic circuit connector auxiliary contact 128, quadrupole contactor dynamic circuit connector auxiliary contact 129, data acquisition transmission board 130, simultaneously
Net inverter 132, accumulator group 133, off-network inverter 113, battery management unit 123, DC/DC controllers 134.
The main circuit part connection type being connected with photovoltaic module is as shown in Figure 1, specific connection type is as follows：Photovoltaic module
100 anodes with 106 one of dynamic circuit connector main contacts of quadrupole contactor is suitable for reading is connected, 100 cathode of photovoltaic module and quadrupole contactor
107 one of dynamic circuit connector main contacts are suitable for reading to be connected, 101 anode of photovoltaic module and another dynamic circuit connector main contacts of quadrupole contactor 106
It is suitable for reading to be connected, 101 cathode of photovoltaic module and quadrupole contactor 107 another dynamic circuit connector main contacts is suitable for reading is connected, photovoltaic module（102、
103）Anode, cathode and level Four contactor（106、107）Remaining dynamic circuit connector main contacts connection suitable for reading, quadrupole contact
134 electrode input end of DC/DC controllers, 107 4, quadrupole contactor are connected under 106 4 dynamic circuit connector main contacts of device after mouth short circuit
134 negative input of DC/DC controllers is connected under dynamic circuit connector main contacts after mouth short circuit；100 anode of photovoltaic module is contacted with three poles
The series connection of 104 one of dynamic circuit connector main contacts of device is followed by 132 positive input terminal of gird-connected inverter, 103 cathode of photovoltaic module and three poles
Other two dynamic circuit connector main contacts of contactor 104, which is sequentially connected in series, is followed by 132 negative input end of gird-connected inverter.
Fig. 2 is the main circuit contact device break-make sequence diagram being connected with photovoltaic module, t in figured1For contactor coil KM1, KM2
After dead electricity, coil KM3, KM4 obtain electric preceding delay time, td2After being disconnected for contactor KM3, KM4, prolonging before KM1, KM2 closure
When the time, high level indicates that corresponding contactor is closed in figure, and low level indicates that corresponding contactor disconnects.Wherein three poles contact
Device（104、105）All dynamic circuit connector main contacts, which synchronize, to be attracted or disconnects, quadrupole contactor（106、107）All dynamic circuit connector main contacts synchronize
It is attracted or disconnects, and triple pole contactor（104、105）With quadrupole contactor（106、107）Dynamic circuit connector main contacts synchronization not
It can be attracted simultaneously, triple pole contactor（104、105）After dynamic circuit connector main contacts disconnects a period of time, quadrupole contactor（106、107）It is dynamic
Closing main contacts could normally be attracted, similarly, quadrupole contactor（106、107）After dynamic circuit connector main contacts disconnects a period of time, three poles connect
Tentaculum（104、105）Dynamic circuit connector main contacts could be normally attracted, on same timing node, triple pole contactor（104、105）Dynamic circuit connector master
Contact and quadrupole contactor（106、107）The all possible state of dynamic circuit connector main contacts includes：Triple pole contactor（104、105）Dynamic circuit connector
Main contacts disconnection, quadrupole contactor（106、107）Dynamic circuit connector main contacts disconnects；Triple pole contactor（104、105）Dynamic circuit connector main contacts is disconnected
It opens, quadrupole contactor（106、107）Dynamic circuit connector main contacts is closed；Quadrupole contactor（106、107）Dynamic circuit connector main contacts disconnects, three poles connect
Tentaculum（104、105）Dynamic circuit connector main contacts is closed.
Embodiment two：
To realize the break-make rule of main circuit contact device in embodiment 1, triple pole contactor, quadrupole contactor in the present embodiment
Coil obtains electric, dead electricity sequence diagram as shown in figure 3, t in figured3After contactor coil KM1, KM2 dead electricity, coil KM3, KM4 are obtained
Delay time before electricity, td4After contactor coil KM3, KM4 dead electricity, coil KM1, KM2 obtain it is electric before delay time, it is high in figure
It is electric that level indicates that corresponding contactor coil obtains, and low level indicates corresponding contactor coil dead electricity.Triple pole contactor coil
（108、109）Electric or dead electricity, quadrupole contactor coil are obtained simultaneously（118、119）While electric or dead electricity is obtained, but triple pole contactor
Coil（108、109）With quadrupole contactor coil（118、119）Cannot simultaneously it is electric, on same timing node, triple pole contactor
Coil（108、109）With quadrupole contactor coil（118、119）It is all possible that electricity condition includes：Triple pole contactor coil
（108、109）Dead electricity, quadrupole contactor coil（118、119）Dead electricity；Triple pole contactor coil（108、109）Dead electricity, quadrupole connect
Tentaculum coil（118、119）It obtains electric；Quadrupole contactor coil（118、119）Dead electricity, triple pole contactor coil（108、109）
Electricity.
To make the sequential rule of triple pole contactor in the embodiment, quadrupole contactor coil as shown in Figure 3 obtain electric and dead electricity,
Triple pole contactor, quadrupole contactor control loop connection type as shown in Figure 1, specific connection type is as follows：Triple pole contactor
Coil（108、109）Shorted on one end and with delay attracting electric relay coil 115 one end be connected afterwards and the miniature open circuit in alternating current side
126 one end of device is connected, triple pole contactor coil（108、109）Other end short circuit after, successively with delay attracting electric relay dynamic circuit connector
Contact 110, intermediate relay moving together contact 111, quadrupole contactor dynamic circuit breaker auxiliary contact（112、114）Series connection is followed by alternating current side
The other end of the other end of miniature circuit breaker 126, delay attracting electric relay coil 115 is connected to intermediate relay moving together contact
111,110 series connection midpoint of delay attracting electric relay moving together contact.Quadrupole contactor coil（118、119）Shorted on one end and with
One end that one end of delay attracting electric relay coil 125 exports after being connected with miniature sinewave inverter 116 is connected, quadrupole contact
Device coil（118、119）Other end short circuit after, successively with delay attracting electric relay moving together contact 120, intermediate relay dynamic circuit breaker
Contact 121, triple pole contactor dynamic circuit breaker auxiliary contact（122、124）The output of miniature sinewave inverter 116 is connected to after series connection
The other end, the other end of delay attracting electric relay coil 125 is connected to intermediate relay moving together contact 121, delay is attracted relay
The series connection midpoint of device moving together contact 120.
The specific explanations and function of the above-mentioned connection method of the present embodiment control loop are as follows：
Fig. 4 is the break-make of intermediate relay, time relay contact and contactor auxiliary contact during alternating current stops sending a telegram in reply
State, in figure, td5After being powered off for alternating current, time mechanical delay of overturning, t are completed in the contact that state is overturnd6It is inhaled for delay
It closes relay coil 125 and obtains the electric delay time being closed to delay attracting electric relay moving together contact 120, td7For quadrupole contactor line
Circle 118,119 obtains electric time mechanical delay being fully disconnected to quadrupole contactor dynamic circuit breaker auxiliary contact 112,114, td8For centre after
Electric apparatus coil 117 obtains electric time mechanical delay being closed completely to intermediate relay moving together contact 111, td9For quadrupole contactor line
Time mechanical delay that 118,119 dead electricity of circle are closed completely to quadrupole contactor dynamic circuit breaker auxiliary contact 112,114, td10For delay
Attracting electric relay coil 115 obtains the electric delay time being closed to delay attracting electric relay moving together contact 110, td11It is contacted for three poles
Device coil 108,109 electric time mechanical delay being fully disconnected to triple pole contactor dynamic circuit breaker auxiliary contact 122,124, it is high in figure
Level indicates that corresponding contact is in closed state, and low level indicates that corresponding contact is off.Intermediate shown in compares figure 4,
Known to the on off operating mode of time relay contact and contactor auxiliary contact：When alternating current powers off, intermediate relay coil 117
Dead electricity, intermediate relay moving together contact 111 disconnect, and intermediate relay break contact 121 is closed, intermediate relay moving together contact
111 disconnections lead to triple pole contactor coil（108、109）, 115 current supply circuit of delay attracting electric relay coil disconnects, and causes to prolong
When attracting electric relay moving together contact 110, triple pole contactor（104、105）Dynamic circuit connector main contacts disconnects, related triple pole contactor dynamic circuit breaker
Auxiliary contact（122、124）It is closed, at this time photovoltaic module（100、101、102、103）It is complete with the connection of gird-connected inverter 132
It disconnects, simultaneously because intermediate relay break contact 121, triple pole contactor dynamic circuit breaker auxiliary contact（122、124）It is closed so that prolong
When attracting electric relay coil 125 it is electric, delay attracting electric relay coil 125 after the electric time reaches preset time, delay is attracted
Relay moving together contact 120 is closed so that quadrupole contactor coil（118、119）Electric it must make quadrupole contactor（106、107）It closes
It closes, at this time photovoltaic module（100、101、102、103）By and be unified into four groups and be linked into DC/DC controllers 134；When city power recovery,
Intermediate relay coil 117 must be electric, and intermediate relay break contact 121 disconnects, and intermediate relay moving together contact 111 is closed, in
Between the disconnection of relay break contact 121 cause quadrupole contactor coil 118,119, delay attracting electric relay coil 125 to be powered back
Road disconnects, and leads to be delayed attracting electric relay moving together contact 120, quadrupole contactor（106、107）Dynamic circuit connector main contacts disconnects, related
Quadrupole contactor dynamic circuit breaker auxiliary contact（112、114）It is closed, at this time photovoltaic module（100、101、102、103）It is controlled with DC/DC
The connection of device 134 is fully disconnected, simultaneously because the moving together contact 111 of intermediate relay, quadrupole contactor dynamic circuit breaker auxiliary contact
（112、114）Be closed so that delay attracting electric relay coil 115 it is electric, delay attracting electric relay coil 115 the electric time reaches
After preset time, delay attracting electric relay moving together contact 110 is closed so that triple pole contactor coil（108、109）Electric it must make three poles
Contactor（104、105）It is closed, at this time photovoltaic module（100、101、102、103）A group of access is connected into gird-connected inverter
132。
Embodiment three：
A kind of grid-connected off-network compatible switching system for photovoltaic generating system, be configurable to it is as described in Figure 1 more
Complete system, wherein data acquire transmission board 130 and acquire gird-connected inverter 132, DC/DC controllers 134 by RS485 buses
Deng operation data information, data acquire transmission board 130 pass through detect triple pole contactor dynamic circuit connector auxiliary contact 128, quadrupole contact
The operating mode of the 129 state information acquisition switching system of device dynamic circuit connector auxiliary contact, data acquire transmission board 130 and GPRS module
127 pass through GPRS communication modes by RS232 bus communications, by collected data information and the operating mode of the switching system
It uploads to far-end server to inquire for user, battery management unit 123 provides the basic management work(of 133 charge and discharge of accumulator group
Can, the output of the input connection DC/DC controllers 134 of battery management unit 123, the output of battery management unit 123 is made
For the power supply of direct current user, and according to the difference of electricity consumption priority, it is separately connected off-network inverter 113, miniature sine wave inverter
The input of device 116, while being connected to accumulator group 133, the output of off-network inverter 113, which is connected to two, opens two and closes quadrupole and connect
The dynamic circuit breaker main contacts of tentaculum 136 is suitable for reading, and two, which open two dynamic circuit connector main contacts that two close quadrupole contactor 136, suitable for reading is connected to alternating current side
The outlet side of miniature circuit breaker 126, two, which open two, closes quadrupole contactor coil 135 also by 126 outlet side of alternating current side miniature circuit breaker
Power supply, two open the lower mouth that two close 136 dynamic circuit connector main contacts of quadrupole contactor is parallel to mouth under dynamic circuit breaker main contacts respectively, and alternating current is normal
When, two, which open two, closes 136 dynamic circuit connector main contacts of quadrupole contactor closure, is exchange customer power supply by alternating current, when mains failure, two open two
136 dynamic circuit breaker main contacts of quadrupole contactor closure is closed, is exchange customer power supply by off-network inverter 113.
Other than more complete system configuration described in Fig. 1, the present invention can also be only configured to meet user's minimum essential requirement
Simplify configuration, such as Fig. 5 show the system minimal configuration for meeting communication base station DC load electricity consumption.
It should be noted that design and implementation method of the examples detailed above just for the sake of the elaboration present invention, it is therefore an objective to make this
Technical staff in field understands the particular content of the present invention, and can implement the invention like this, can not limit this with this
The protection domain of invention.Therefore, all according to changes or modifications made by the principle of the invention, design, shape, it should all cover in this hair
In bright protection domain.
Claims (7)
1. a kind of grid-connected off-network compatible switching system for photovoltaic generating system, it is characterised in that：It is by the first photovoltaic module
(100), the second photovoltaic module (101), third photovoltaic module (102) and the 4th photovoltaic module (103), the first triple pole contactor
(104) and the second triple pole contactor (105), the first quadrupole contactor (106) and the second quadrupole contactor (107), two, which open two, closes
Quadrupole contactor (136), the first triple pole contactor coil (108) and the second triple pole contactor coil (109), the contact of the first quadrupole
Device coil (118) and the second quadrupole contactor coil (119), two, which open two, closes quadrupole contactor coil (135), and the first delay is attracted
Relay coil (115) and the second delay attracting electric relay coil (125), the first delay attracting electric relay moving together contact (110)
With second delay attracting electric relay moving together contact (120), intermediate relay (117), intermediate relay moving together contact (111), in
Between relay break contact (121), the first quadrupole contactor dynamic circuit breaker auxiliary contact (112) and the second quadrupole contactor dynamic circuit breaker are auxiliary
Help contact (114), the first triple pole contactor dynamic circuit breaker auxiliary contact (122) and the second triple pole contactor dynamic circuit breaker auxiliary contact
(124), miniature sinewave inverter (116), the first miniature circuit breaker (126) and the second miniature circuit breaker (131), GPRS communications
Module (127), triple pole contactor dynamic circuit connector auxiliary contact (128), quadrupole contactor dynamic circuit connector auxiliary contact (129), data acquisition pass
Input board (130), gird-connected inverter (132), accumulator group (133), off-network inverter (113), battery management unit (123),
DC/DC controllers (134) form；First photovoltaic module (100) anode and the first dynamic circuit connector master of the first quadrupole contactor (106) touch
Point is suitable for reading to be connected, the first dynamic circuit connector main contacts phase suitable for reading of the first photovoltaic module (100) cathode and the second quadrupole contactor (107)
Even, the second photovoltaic module (101) anode with the second dynamic circuit connector main contacts of the first quadrupole contactor (106) is suitable for reading is connected, the second light
Volt component (101) cathode with the second dynamic circuit connector main contacts of the second quadrupole contactor (107) is suitable for reading is connected, third photovoltaic module
(102) and the anode of the 4th photovoltaic module (103) is upper with the third dynamic circuit connector main contacts of the first quadrupole contactor (106) respectively
Mouthful be connected with the 4th the suitable for reading of dynamic circuit connector main contacts, the cathode of third photovoltaic module (102) and the 4th photovoltaic module (103) respectively with
The suitable for reading of third dynamic circuit connector main contacts of second quadrupole contactor (107) is connected with the 4th the suitable for reading of dynamic circuit connector main contacts, the first quadrupole
Under (106) four dynamic circuit connector main contacts of contactor DC/DC controllers (134) electrode input end, the second quadrupole are connected to after mouth short circuit
Under (107) four dynamic circuit connector main contacts of contactor DC/DC controllers (134) negative input is connected to after mouth short circuit；First photovoltaic
The cathode of component (100) is connected with the first dynamic circuit connector main contacts of the second triple pole contactor (105) and is followed by the second photovoltaic module
(101) anode, the cathode of the second photovoltaic module (101) are connected with the second dynamic circuit connector main contacts of the second triple pole contactor (105)
It is followed by the anode of third photovoltaic module (102), the cathode of third photovoltaic module (102) and the second triple pole contactor (105)
The series connection of third dynamic circuit connector main contacts is followed by the anode to the 4th photovoltaic module (103), the first photovoltaic module (100) anode and the one or three
The first dynamic circuit connector main contacts series connection of pole contactor (104) is followed by gird-connected inverter (132) positive input terminal, the 4th photovoltaic module
(103) the second dynamic circuit connector main contacts and third dynamic circuit connector main contacts of cathode and the first triple pole contactor (104) are sequentially connected in series and are followed by
To gird-connected inverter (132) negative input end.
2. a kind of grid-connected off-network compatible switching system for photovoltaic generating system as described in claim 1, it is characterised in that：
First triple pole contactor (104) actuation synchronous with all dynamic circuit connector main contacts of the second triple pole contactor (105) or disconnection, first
Quadrupole contactor (106) actuation synchronous with all dynamic circuit connector main contacts of the second quadrupole contactor (107) or disconnection, and the one or three pole
The dynamic circuit connector main contacts of contactor (104) and the second triple pole contactor (105) connects with the first quadrupole contactor (106) and the second quadrupole
The dynamic circuit connector main contacts of tentaculum (107) cannot be attracted simultaneously in synchronization, and the first triple pole contactor (104) and the two or three pole connect
After the dynamic circuit connector main contacts of tentaculum (105) disconnects a period of time, the first quadrupole contactor (106) and the second quadrupole contactor (107)
Dynamic circuit connector main contacts could normally be attracted, similarly, the dynamic circuit connector of the first quadrupole contactor (106) and the second quadrupole contactor (107)
After main contacts disconnects a period of time, the dynamic circuit connector main contacts of the first triple pole contactor (104) and the second triple pole contactor (105) is
It can normally be attracted, on same timing node, the dynamic circuit connector master of the first triple pole contactor (104) and the second triple pole contactor (105) touches
It puts and all possible state of dynamic circuit connector main contacts of the first quadrupole contactor (106) and the second quadrupole contactor (107) includes：
The dynamic circuit connector main contacts of first triple pole contactor (104) and the second triple pole contactor (105) disconnects, the first quadrupole contactor
(106) it is disconnected with the dynamic circuit connector main contacts of the second quadrupole contactor (107)；
The dynamic circuit connector main contacts of first triple pole contactor (104) and the second triple pole contactor (105) disconnects, the first quadrupole contactor
(106) it is closed with the dynamic circuit connector main contacts of the second quadrupole contactor (107)；
The dynamic circuit connector main contacts of first quadrupole contactor (106) and the second quadrupole contactor (107) disconnects, the first triple pole contactor
(104) it is closed with the dynamic circuit connector main contacts of the second triple pole contactor (105).
3. a kind of grid-connected off-network compatible switching system for photovoltaic generating system as claimed in claim 2, it is characterised in that：
First triple pole contactor coil (108) and the second triple pole contactor coil (109) at the same electric or dead electricity, the first quadrupole contactor
Coil (118) and the second quadrupole contactor coil (119) at the same electric or dead electricity, but the first triple pole contactor coil (108)
No with the second triple pole contactor coil (109) and the first quadrupole contactor coil (118) and the second quadrupole contactor coil (119)
Can simultaneously it is electric, on same timing node, the first triple pole contactor coil (108) and the second triple pole contactor coil (109) with
First quadrupole contactor coil (118) and the second quadrupole contactor coil (119) are all possible that electricity condition includes：
First triple pole contactor coil (108) and second triple pole contactor coil (109) dead electricity, the first quadrupole contactor coil
(118) and second quadrupole contactor coil (119) dead electricity；
First triple pole contactor coil (108) and second triple pole contactor coil (109) dead electricity, the first quadrupole contactor coil
(118) and the second quadrupole contactor coil (119) must be electric；
First quadrupole contactor coil (118) and second quadrupole contactor coil (119) dead electricity, the first triple pole contactor coil
(108) and the second triple pole contactor coil (109) must be electric.
4. a kind of grid-connected off-network compatible switching system for photovoltaic generating system as claimed in claim 3, it is characterised in that：
The first end short circuit of first triple pole contactor coil (108) and the second triple pole contactor coil (109) is simultaneously attracted with the first delay
The first end of relay coil (115) is connected after being connected with the first end of the first miniature circuit breaker of alternating current side (126), the one or three pole
After the second end short circuit of contactor coil (108) and the second triple pole contactor coil (109), relay is attracted with the first delay successively
Device moving together contact (110), intermediate relay moving together contact (111), the first quadrupole contactor dynamic circuit breaker auxiliary contact (112) and second
Quadrupole contactor dynamic circuit breaker auxiliary contact (114), which are connected, is followed by the second end of the first miniature circuit breaker of alternating current side (126), and first prolongs
When attracting electric relay coil (115) second end be connected to intermediate relay moving together contact (111) and first delay be attracted relay
The midpoint that device moving together contact (110) is in series.
5. a kind of grid-connected off-network compatible switching system for photovoltaic generating system as claimed in claim 3, it is characterised in that：
The first end short circuit of first quadrupole contactor coil (118) and the second quadrupole contactor coil (119) is simultaneously attracted with the second delay
The first end of relay coil (125) is connected after being connected with the first end of miniature sinewave inverter (116) output, the first quadrupole
It is dynamic with the second delay attracting electric relay successively after the second end short circuit of contactor coil (118) and the second quadrupole contactor (119)
Conjunction contact (120), intermediate relay break contact (121), the first triple pole contactor dynamic circuit breaker auxiliary contact (122) and the two or three pole
The second end of miniature sinewave inverter (116) output, the second delay are connected to after contactor dynamic circuit breaker auxiliary contact (124) series connection
The second end of attracting electric relay coil (125) is connected to intermediate relay break contact (121) and the second delay attracting electric relay
The midpoint that moving together contact (120) is in series.
6. a kind of grid-connected off-network compatible switching system for photovoltaic generating system as described in claim 4 or 5, feature exist
In：When alternating current powers off, intermediate relay coil (117) dead electricity cause intermediate relay moving together contact (111) disconnect and it is intermediate after
Electric appliance break contact (121) be closed, intermediate relay moving together contact (111) disconnection cause the first triple pole contactor coil (108),
The current supply circuit of second triple pole contactor coil (109) and the first delay attracting electric relay coil (115) disconnects, and leads to first
The attracting electric relay moving together contact that is delayed (110), the moving together contact and the second triple pole contactor of the first triple pole contactor (104)
(105) dynamic circuit connector main contacts disconnects, related first triple pole contactor dynamic circuit breaker auxiliary contact (122) and the second triple pole contactor dynamic circuit breaker
Auxiliary contact (124) be closed, at this time the first photovoltaic module (100), the second photovoltaic module (101), third photovoltaic module (102) and
Connection of 4th photovoltaic module (103) respectively with gird-connected inverter (132) is fully disconnected, simultaneously because intermediate relay dynamic circuit breaker is touched
Point (121), the first triple pole contactor dynamic circuit breaker auxiliary contact (122) and the second triple pole contactor dynamic circuit breaker auxiliary contact (124) are closed,
So that second delay attracting electric relay coil (125) it is electric, second delay attracting electric relay coil (125) the electric time reach pre-
If after the time, the second delay attracting electric relay moving together contact (120) is closed so that the first quadrupole contactor coil (118) and second
Quadrupole contactor coil (119) it is electric make the first quadrupole contactor (106) and the second quadrupole contactor (107) closure, at this time the
One photovoltaic module (100), the second photovoltaic module (101), third photovoltaic module (102) and the 4th photovoltaic module (103) are in parallel
It is linked into DC/DC controllers (134) at four groups；When city power recovery, intermediate relay coil (117) obtains conductance and causes intermediate relay
Break contact (121) disconnects and intermediate relay moving together contact (111) is closed, and intermediate relay break contact (121) disconnection is led
Cause the first quadrupole contactor coil (118), the second quadrupole contactor coil (119) and the second delay attracting electric relay coil
(125) current supply circuit disconnects, and leads to the second delay attracting electric relay moving together contact (120), the first quadrupole contactor (106)
Dynamic circuit connector main contacts and the moving together contact of the second quadrupole contactor (107) disconnect, related first quadrupole contactor dynamic circuit breaker auxiliary is touched
Point (112) and the second quadrupole contactor dynamic circuit breaker auxiliary contact (114) are closed, at this time the first photovoltaic module (100), the second photovoltaic group
Part (101), third photovoltaic module (102) and the 4th photovoltaic module (103) are complete with the connection of DC/DC controllers (134) respectively
It disconnects, simultaneously because the moving together contact (111) of intermediate relay, the first quadrupole contactor dynamic circuit breaker auxiliary contact (112) and second
Quadrupole contactor dynamic circuit breaker auxiliary contact (114) are closed so that the first delay attracting electric relay coil (115) obtains electric, the first delay
After attracting electric relay coil (115) the electric time must reach preset time, the first delay attracting electric relay moving together contact (110) is closed
So that the first triple pole contactor coil (108) and the second triple pole contactor (109) electric must make the first triple pole contactor (104) and the
Two triple pole contactors (105) are closed, at this time the first photovoltaic module (100), the second photovoltaic module (101), third photovoltaic module
(102) and third photovoltaic module (103) is connected into a group of access to gird-connected inverter (132).
7. a kind of grid-connected off-network compatible switching system for photovoltaic generating system as described in claim 1, it is characterised in that：
Data acquire transmission board (130) and acquire gird-connected inverter (132) or DC/DC controllers (134) or grid-connected inverse by RS485 buses
Become the operation data information of device (132) and DC/DC controllers (134), data acquire transmission board (130) by detecting the contact of three poles
The work of device dynamic circuit connector auxiliary contact (128) and the state information acquisition of quadrupole contactor dynamic circuit connector auxiliary contact (129) switching system
Operation mode, data acquire transmission board (130) with GPRS module (127) by RS232 bus communications, by collected data information
And the operating mode of the switching system uploads to far-end server by GPRS communication modes and is inquired for user, battery management list
First (123) provide the basic management function of accumulator group (133) charge and discharge, and the input of battery management unit (123) connects DC/
The output of DC controllers (134), the power supply of battery management unit (123) exported as direct current user, and it is excellent according to electricity consumption
The difference of first grade is separately connected the input of off-network inverter (113) and miniature sinewave inverter (116), connects simultaneously
To accumulator group (133), the output of off-network inverter (113) be connected to two open that two close quadrupole contactor (136) first and
Two dynamic circuit breaker main contacts are suitable for reading, and two, which open the first and second dynamic circuit connector main contacts that two close quadrupole contactor (136), suitable for reading is connected to alternating current
The outlet side of the first miniature circuit breaker of side (126), two open two, and to close quadrupole contactor coil (135) also miniature disconnected by alternating current side first
Road device (126) outlet side is powered, two open the lower mouths of the first and second dynamic circuit connector main contacts that two close quadrupole contactor (136) respectively with
Two, which open mouth under the first and second dynamic circuit breaker main contacts that two close quadrupole contactor (136), is connected, and when alternating current is normal, two, which open two, closes quadrupole
First and second dynamic circuit connector main contacts of contactor (136) are closed, and are exchange customer power supply by alternating current, and when mains failure, two open two
The the first and second dynamic circuit breaker main contacts for closing quadrupole contactor (136) are closed, and are exchange customer power supply by off-network inverter (113).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610049721.0A CN105939022B (en) | 2016-01-26 | 2016-01-26 | A kind of grid-connected off-network compatible switching system for photovoltaic generating system |
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| CN201610049721.0A CN105939022B (en) | 2016-01-26 | 2016-01-26 | A kind of grid-connected off-network compatible switching system for photovoltaic generating system |
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| CN105939022B true CN105939022B (en) | 2018-08-24 |
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| CN106655255B (en) * | 2016-10-28 | 2018-11-06 | 阳光电源股份有限公司 | Photovoltaic energy storage inverter and/off-network, off-grid grid-connected switching method and circuit |
| CN109245214B (en) * | 2018-09-27 | 2023-08-29 | 北京凯华网联新能源技术有限公司 | Multi-channel mixed battery manager of communication base station based on competition mechanism |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800498A (en) * | 2010-04-01 | 2010-08-11 | 华为技术有限公司 | Solar energy power generation system, control device and control method |
| WO2013007494A2 (en) * | 2011-07-08 | 2013-01-17 | Sma Solar Technology Ag | Dc/ac converter, power generation plant and operating method for a dc/ac converter |
| CN103227588A (en) * | 2012-01-30 | 2013-07-31 | 太阳能安吉科技有限公司 | Photovoltaic panel circuitry |
| CN205583710U (en) * | 2016-01-26 | 2016-09-14 | 姜宪明 | A be incorporated into power networks from compatible switched systems of net for photovoltaic power generation system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2923653B1 (en) * | 2007-11-08 | 2009-11-27 | Harald Hauf | OPERATING METHOD AND DEVICE FOR CONTROLLING AN ENERGY PLANT WITH PHOTOVOLTAIC MODULES. |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800498A (en) * | 2010-04-01 | 2010-08-11 | 华为技术有限公司 | Solar energy power generation system, control device and control method |
| WO2013007494A2 (en) * | 2011-07-08 | 2013-01-17 | Sma Solar Technology Ag | Dc/ac converter, power generation plant and operating method for a dc/ac converter |
| CN103227588A (en) * | 2012-01-30 | 2013-07-31 | 太阳能安吉科技有限公司 | Photovoltaic panel circuitry |
| CN205583710U (en) * | 2016-01-26 | 2016-09-14 | 姜宪明 | A be incorporated into power networks from compatible switched systems of net for photovoltaic power generation system |
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