CN104953610A - Grid-side anti-islanding system used for distributed photovoltaic grid connected power generation and control method of said system - Google Patents
Grid-side anti-islanding system used for distributed photovoltaic grid connected power generation and control method of said system Download PDFInfo
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- CN104953610A CN104953610A CN201410115486.3A CN201410115486A CN104953610A CN 104953610 A CN104953610 A CN 104953610A CN 201410115486 A CN201410115486 A CN 201410115486A CN 104953610 A CN104953610 A CN 104953610A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention provides a grid-side anti-islanding system used for distributed photovoltaic grid connected power generation. The anti-islanding system includes a grid connected switch cabinet. A secondary circuit of the grid connected witch cabinet includes a closing coil HJ, an opening coil FJ, a remote control closing contact K1, a remote opening contact K2, a manual closing button AH, a manual opening button AF, a closing interlocking contact BS, a first normally-open contact HJ1, a second normally-open contact HJ2, a third normally-open contact FJ1, a first normally-closed contact FJ2 and a second normally-closed contact HJ3. According to the invention, a photovoltaic grid connected switch needs to be turned off in principle when power failure of the power grid occurs. A grid-side worker can interlock a closing control circuit remotely through a client terminal, so that the grid connected switch is prevented from closing again and the connection between a distributed photovoltaic power station and a power distribution network can be cut off. Current flowing back to a dead line is eliminated. Life security of a maintenance worker is guaranteed. Besides, damage to power failure equipment is also avoided.
Description
Technical field
The present invention relates to distributed power source access technology field, particularly relate to a kind of grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic and control method thereof.
Background technology
Distributed photovoltaic power generation refers in particular to employing photovoltaic module, solar energy is directly converted to the distributed generation system of electric energy.It is a kind of novel, tool generating with broad prospects for development and comprehensive utilization of energy mode, it is advocated and generates electricity nearby, grid-connected nearby, change nearby, the principle used nearby, effectively can not only improve the energy output of same size photovoltaic plant, also efficiently solve the loss problem of electric power in boosting and long-distance transport simultaneously.
Distributed photovoltaic power generation needs to become alternating current to deliver on electrical network DC power conversion by inverter again.Because grid-connected photovoltaic system directly feeds back to electrical network by after solar energy inversion, so need various perfect safeguard measure, except the protection of common electric current, voltage and frequency monitoring, also need to consider island effect.So-called isolated island refers to when electrical network is because of accident or power failure maintenance, self is not cut off grid-connected electrical network by user side distributed generation system, and form the system of a self-energizing of the load composition of distribution generating and surrounding, isolated island must after power distribution network has a power failure, stopping powers to the load, otherwise the voltage of the uncontrollable system of electrical network and frequency when distributed photovoltaic power generation system is in island operation state, not only may cause damage to the equipment of user, and bring contact dangerous may to the staff of line maintenance, reduce the fail safe of electrical network, visible, the generation preventing island effect must be taken effective measures.
Summary of the invention
The technical problem to be solved in the present invention is: in order to prevent the generation of island effect, avoid because island effect causes damage to subscriber equipment, bring contact dangerous to the staff of line maintenance, the invention provides a kind of grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic and control method thereof after power distribution network has a power failure, connection between distributed photovoltaic power station and power distribution network can be cut off in time, and carry out closing locking control, restart distributed photovoltaic power generation station to need power distribution network side directly to unlock or be issued to user side to carry out unblock to combined floodgate latch contact and solve the problems referred to above.
The technical solution adopted for the present invention to solve the technical problems is: a kind of grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic, comprise grid-connected switch cubicle, the secondary circuit of described grid-connected switch cubicle comprises closing coil HJ, switching winding FJ, remote control closing contact K1, remote control separating brake contact K2, closing by hand button AH, manual brake separating button AF, closing locking contact BS, first normally opened contact HJ1, second normally opened contact HJ2, 3rd normally opened contact FJ1, first normally-closed contact FJ2 and the second normally-closed contact HJ3, described closing coil HJ controls described first normally opened contact HJ1, second normally opened contact HJ2 and the second normally-closed contact HJ3, described switching winding FJ controls the 3rd normally opened contact FJ1 and the first normally-closed contact FJ2, closing locking contact BS is normally-closed contact,
It is in parallel with remote control closing contact K1 and closing by hand button AH respectively after described first normally opened contact HJ1 connects with the first normally-closed contact FJ2, and a termination first power end KM+, the two ends of the second normally opened contact HJ2 are connected in parallel on after described closing locking contact BS connects with the 3rd normally opened contact FJ1, and one end and the first normally-closed contact FJ2, closing by hand button AH is connected with other one end of remote control closing contact K1, the coil two ends of described closing coil HJ are connected with other one end of described second normally opened contact HJ2 and the 3rd normally opened contact FJ1 and second source end KM-respectively, thus form shutting-brake control loop,
A termination first power end KM+ after described second normally-closed contact HJ3 is in parallel with described remote control separating brake contact K2 and manual brake separating button AF respectively, one end is connected with coil one end of described switching winding FJ in addition, another termination second source end of the coil of described switching winding FJ KM-, thus form separating brake control loop.
Close a floodgate or gate-dividing state in order to more directly perceived the grasp more in time of user can be allowed, also comprise combined floodgate warning light HD, separating brake warning light LD, 4th normally opened contact HJ4 and the 5th normally opened contact FJ3, described closing coil HJ controls described 4th normally opened contact HJ4, described switching winding FJ controls described 5th normally opened contact FJ3, described first power end KM+, combined floodgate warning light HD, 4th normally opened contact HJ4 and second source end KM-connects successively and forms prompting loop of closing a floodgate, described first power end KM+, separating brake warning light LD, 5th normally opened contact FJ3 and second source end KM-connects successively and forms separating brake prompting loop.
Also comprise control cabinet, the microprocessor of built-in system program is provided with in described control cabinet, the closed procedure of combined floodgate latch contact BS is encrypted, control closing locking contact BS dead electricity when obtaining operation password and combined floodgate unlock command at the same time to close, the Closed control power of closing locking contact BS like this rests in power distribution network side completely, the unblock intention of user is restricted, further ensure that photo-voltaic power generation station is in gate-dividing state all the time when power distribution network has a power failure, stop to carry out feed motion because of the misoperation of user side or erroneous judgement, electric current is caused to deliver to maintenance circuit, the situation of the life security of serious threat maintainer, the form of operation password has a variety of, such as random cipher, utilize random cipher while increasing reliability, improve the flexibility controlling closing locking contact BS, as long as the random cipher of grasp is informed user when the staff of power distribution network side cannot carry out combined floodgate unlocking operation, authorized user carries out combined floodgate unlocking operation, described microprocessor and described shutting-brake control loop, separating brake control loop is connected with separating brake prompting loop, described have for microprocessor
Combined floodgate input, connects described remote control closing contact K1, and microprocessor receives reclosing command, controls described remote control closing contact K1 and closes;
Separating brake input, connects described remote control separating brake contact K2, and microprocessor receives separating brake instruction, controls described remote control separating brake contact K2 and closes;
Closing locking input, connects described closing locking contact BS, and microprocessor receives closing locking instruction or combined floodgate unlock command, controls closing locking contact BS and disconnects or close.
Conveniently user points out the grasp of the real-time status of loop and closing locking contact BS to combined floodgate control loop, separating brake control loop, separating brake and operates them, and described microprocessor is also connected with
Display module, display shutting-brake control loop, separating brake control loop, separating brake prompting loop and the real-time status of closing locking contact BS, display is closed a floodgate, the operation interface of separating brake and closing locking, when carrying out closing operation, display operation password entry interface;
Key circuit, for in shutting-brake control loop, separating brake control loop, separating brake prompting loop, closing locking contact BS real-time status display interface, combined floodgate, carry out handover operation between separating brake and the operation interface of closing locking, with by combined floodgate, separating brake, combined floodgate unlock and closing locking instruction be typed in microprocessor, when carrying out combined floodgate unlocking operation, for microprocessor input operation password.
Described display module comprises touch liquid crystal screen and the first drive circuit, described key circuit comprises button and the second drive circuit, described button is the set of described touch liquid crystal screen upper local touch point, described second drive circuit is integrated in the first drive circuit, display module and key circuit are integrated in one, not only to show and carrying out of keying in is convenient and coordinate, and reduce the volume of whole device, be convenient to install and implement.
The client also comprising server and network with described server, described server and described microprocessor telecommunication, the built-in control software design of described client, for combined floodgate, separating brake, combined floodgate being unlocked by access services device, closing locking instruction and operation password remote transmission are in described microprocessor and obtain "on" position, gate-dividing state and closing locking state and show.
Concrete, described microprocessor be also connected with for power not between power failure source.
Described microprocessor is also connected with USB communication module, and for typing in described microprocessor or renewal system program, according to concrete service condition, timely redjustment and modification system program, improves performance and the stability of device.
Described microprocessor is also connected with GPRS communication module, for Remote Acquisitioning combined floodgate, separating brake, combined floodgate unblock, closing locking instruction and operation password, and "on" position, gate-dividing state and closing locking state are sent, the GPSR wide network coverage, relevant corollary equipment technology maturation, utilization rate is high, transfer of data is reliable, also be convenient to implement and arrange, certainly also do not limit to and GPRS network, as long as the object of remote transmission can be reached, all can be used for this, such as, in WIFi wireless network or industry conventional WIA wireless network.
For a control method for the grid side anti-islanding system that distributed photovoltaic generates electricity by way of merging two or more grid systems, comprise the following steps:
A, when carrying out sub-switching operation in user side by described manual brake separating button:
A, unclamp after pressing described manual brake separating button, the coil of described switching winding FJ obtains and electricly carries out separating brake action, described first normally-closed contact FJ1 disconnects, thus shutting-brake control loop is disconnected, the coil losing electricity of described closing coil HJ, described first normally opened contact HJ1, second normally opened contact HJ2 all disconnects, the power-off of shutting-brake control loop, described second normally-closed contact HJ2 closes, the coil of described switching winding FJ continues electric, described 4th normally opened contact HJ4 disconnects, described combined floodgate warning light HD extinguishes, 5th normally opened contact FJ3 closes, described separating brake warning light LD lights,
Gate-dividing state and closing locking state show in real time by b, described microprocessor on display module, if described closing locking contact BS is still in closure state, then by the instruction of key circuit input closing locking, microprocessor controls closing locking contact BS and obtains electric disconnection after receiving closing locking instruction, during successful closing locking, key circuit cannot input closing locking instruction;
Gate-dividing state and closing locking status remote are transferred to server by GPRS communication module by c, described microprocessor, described client-access server obtains gate-dividing state and closing locking state, if described closing locking contact BS is still in closure state, closing locking instruction is transferred to microprocessor by Server remote by client, described Microprocessor S3C44B0X closing locking contact BS obtains electric disconnection, and during successful closing locking, client cannot input closing locking instruction;
B, when sub-switching operation is carried out by key circuit in user side:
D, when being in "on" position, reclosing command cannot be keyed in by key circuit, closing locking instruction and carry out combined floodgate unlocking operation, according to the operation interface of separating brake and closing locking, separating brake instruction is keyed in microprocessor by key circuit, the of short duration closed rear disconnection of remote control separating brake contact K2 described in described Microprocessor S3C44B0X, after success separating brake, key circuit inputs closing locking instruction again, Microprocessor S3C44B0X closing locking contact BS obtains electric disconnection, after success closing locking, key circuit cannot input closing locking instruction again, the coil of described switching winding FJ obtains and electricly carries out separating brake action, described first normally-closed contact FJ1 disconnects, thus shutting-brake control loop is disconnected, the coil losing electricity of described closing coil HJ, described first normally opened contact HJ1, second normally opened contact HJ2 all disconnects, the power-off of shutting-brake control loop, described second normally-closed contact HJ2 closes, the coil of described switching winding FJ continues electric, described 4th normally opened contact HJ4 disconnects, described combined floodgate warning light HD extinguishes, 5th normally opened contact FJ3 closes, described separating brake warning light LD lights,
Gate-dividing state and closing locking status remote are transferred to server by GPRS communication module by e, described microprocessor, described client-access server obtains gate-dividing state and closing locking state, if described closing locking contact BS is still in closure state, closing locking instruction is transferred to microprocessor by Server remote by client, described Microprocessor S3C44B0X closing locking contact BS obtains electric disconnection, and during successful closing locking, client cannot input closing locking instruction;
C, when carrying out long-range sub-switching operation:
F, when being in "on" position, client cannot input reclosing command, closing locking instruction and combined floodgate unlock command, separating brake instruction is transferred to microprocessor by Server remote by client, described microprocessor is received by GPRS communication module and controls the of short duration closed rear disconnection of described remote control separating brake contact K2, success separating brake after client again by closing locking command to microprocessor, closing locking contact BS obtains electric disconnection, after success closing locking, client cannot input closing locking instruction again, the coil of described switching winding FJ obtains and electricly carries out separating brake action, described first normally-closed contact FJ1 disconnects, thus make the power-off of shutting-brake control loop, the coil losing electricity of described closing coil HJ, described first normally opened contact HJ1, second normally opened contact HJ2 all disconnects, the power-off of shutting-brake control loop, described second normally-closed contact HJ2 closes, the coil of described switching winding FJ continues electric, described 4th normally opened contact HJ4 disconnects, described combined floodgate warning light HD extinguishes, 5th normally opened contact FJ3 closes, described separating brake warning light LD lights,
D, when closing operation is carried out in user side:
G, when being in gate-dividing state, separating brake instruction cannot be keyed in by key circuit, after user obtains operation password, display module ejection operation password entry interface, unlocked by key circuit input operation password according to operation password entry interface, described Microprocessor S3C44B0X closing locking contact BS dead electricity closes, and after successful unlock, key circuit cannot carry out combined floodgate unlocking operation again;
H, reclosing command is keyed in by key circuit, disconnect after Microprocessor S3C44B0X remote control closing contact K1 is closed, or unclamp after pressing closing by hand button AH, 3rd normally opened contact FJ1 is in closure state, the conducting of shutting-brake control loop, the coil of closing coil HJ obtains and electricly carries out feed motion, described second normally-closed contact HJ3 disconnects, the coil losing electricity of switching winding FJ, first normally-closed contact FJ2 closes, the closed also self-sustaining of first normally opened contact HJ1 and the second normally opened contact HJ2, make shutting-brake control loop constant conduction, and the warning light HD that closes a floodgate lights, separating brake warning light LD extinguishes,
E, carry out remote switching operation time:
I, when being in gate-dividing state, client cannot input separating brake instruction, ejection operation password input dialogue frame in client, user will operate password input client, client will operate password, combined floodgate unlock command and reclosing command are transferred to microprocessor by Server remote, described microprocessor receives and controls described closing locking contact BS dead electricity and closes and the of short duration closed rear disconnection of remote control closing contact K1, after successful unlock, client cannot carry out combined floodgate unlocking operation again, 3rd normally opened contact FJ1 is in closure state, the conducting of shutting-brake control loop, the coil of closing coil HJ obtains and electricly carries out feed motion, second normally-closed contact HJ3 disconnects, the coil losing electricity of switching winding FJ, first normally-closed contact FJ2 closes, the closed also self-sustaining of first normally opened contact HJ1 and the second normally opened contact HJ2, make shutting-brake control loop constant conduction, and the warning light HD that closes a floodgate lights, separating brake warning light LD extinguishes,
Between F, described server and microprocessor and/or client after communicating interrupt when this connects, "on" position, gate-dividing state and closing locking state are sent to server by described microprocessor immediately, described server in real time by "on" position, gate-dividing state and closing locking state synchronized to client.
The invention has the beneficial effects as follows, this grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic and control method thereof, utilize closing coil, switching winding, the conventional components and parts such as contact are designed to simply close a floodgate cleverly, separating brake control loop, reach the combined floodgate to distributed photovoltaic power generation station, separating brake reliably controls, after power distribution network has a power failure, grid-connected switch should pull open in principle, grid side staff can pass through client remote locking combined floodgate control loop in time, prevent the connection that grid-connected switch closes a floodgate between cut-out distributed photovoltaic power station and power distribution network again, guarantee that not having electric current delivers in dead line, ensure that the life security of maintainer, power failure equipments also can not cause damage, the more important thing is the existence due to closing locking contact, if user wants side to carry out to close a floodgate, the mandate that must obtain the staff of power distribution network side could unlock combined floodgate latch contact, make like this before power distribution network is powered again, shutting-brake control is controlled by the staff of power distribution network completely, prevent the misoperation of user side, gate-dividing state is reliably maintained, thus ensure that electric current can not deliver to maintenance circuit further.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the electric distribution map of the grid side anti-islanding system optimal embodiment that the present invention is generated electricity by way of merging two or more grid systems for distributed photovoltaic.
Fig. 2 is the frame diagram of the grid side anti-islanding system optimal embodiment that the present invention is generated electricity by way of merging two or more grid systems for distributed photovoltaic.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
As shown in Fig. 1 ~ 2, the invention provides a kind of grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic, comprise grid-connected switch cubicle, the secondary circuit of grid-connected switch cubicle comprises closing coil HJ, switching winding FJ, remote control closing contact K1, remote control separating brake contact K2, closing by hand button AH, manual brake separating button AF, closing locking contact BS, first normally opened contact HJ1, second normally opened contact HJ2, 3rd normally opened contact FJ1, first normally-closed contact FJ2 and the second normally-closed contact HJ3, closing coil HJ controls the first normally opened contact HJ1, second normally opened contact HJ2 and the second normally-closed contact HJ3, switching winding FJ controls the 3rd normally opened contact FJ1 and the first normally-closed contact FJ2, closing locking contact BS is normally-closed contact,
First normally opened contact HJ1 is in parallel with remote control closing contact K1 and closing by hand button AH respectively after connecting with the first normally-closed contact FJ2, and a termination first power end KM+, closing locking contact BS is connected in parallel on the two ends of the second normally opened contact HJ2 after connecting with the 3rd normally opened contact FJ1, and one end and the first normally-closed contact FJ2, closing by hand button AH is connected with other one end of remote control closing contact K1, the coil two ends of closing coil HJ are connected with other one end of the second normally opened contact HJ2 and the 3rd normally opened contact FJ1 and second source end KM-respectively, thus form shutting-brake control loop,
A termination first power end KM+ after second normally-closed contact HJ3 is in parallel with remote control separating brake contact K2 and manual brake separating button AF respectively, one end is connected with coil one end of switching winding FJ in addition, another termination second source end of the coil of switching winding FJ KM-, thus form separating brake control loop;
The grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic also comprises combined floodgate warning light HD, separating brake warning light LD, the 4th normally opened contact HJ4 and the 5th normally opened contact FJ3, closing coil HJ controls the 4th normally opened contact HJ4, switching winding FJ controls the 5th normally opened contact FJ3, first power end KM+, combined floodgate warning light HD, the 4th normally opened contact HJ4 and second source end KM-connect successively and form prompting loop of closing a floodgate, and the first power end KM+, separating brake warning light LD, the 5th normally opened contact FJ3 and second source end KM-connect successively and form separating brake prompting loop.
The grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic also comprises control cabinet, the microprocessor of built-in system program is provided with in control cabinet, the closed procedure of combined floodgate latch contact BS is encrypted, control closing locking contact BS dead electricity when obtaining operation password and combined floodgate unlock command at the same time to close, microprocessor points out loop to be connected with shutting-brake control loop, separating brake control loop and separating brake, for microprocessor has
Combined floodgate input, connect remote control closing contact K1, microprocessor receives reclosing command, controls remote control closing contact K1 and closes;
Separating brake input, connects remote control separating brake contact K2, and microprocessor receives separating brake instruction, controls remote control separating brake contact K2 and closes;
Closing locking input, connects closing locking contact BS, and microprocessor receives closing locking instruction or combined floodgate unlock command, controls closing locking contact BS and disconnects or close;
Microprocessor is also connected with
Display module, display shutting-brake control loop, separating brake control loop, separating brake prompting loop and the real-time status of closing locking contact BS, display is closed a floodgate, the operation interface of separating brake and closing locking, when carrying out closing operation, display operation password entry interface;
Key circuit, for in shutting-brake control loop, separating brake control loop, separating brake prompting loop, closing locking contact BS real-time status display interface, combined floodgate, carry out handover operation between separating brake and the operation interface of closing locking, with by combined floodgate, separating brake, combined floodgate unlock and closing locking instruction be typed in microprocessor, when carrying out combined floodgate unlocking operation, for microprocessor input operation password;
Display module comprises touch liquid crystal screen and the first drive circuit, and key circuit comprises button and the second drive circuit, and button is the set of touch liquid crystal screen upper local touch point, and the second drive circuit is integrated in the first drive circuit;
The client that the grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic also comprises server and networks with server, server and microprocessor telecommunication, the built-in control software design of client, for combined floodgate, separating brake, combined floodgate being unlocked by access services device, closing locking instruction and operation password remote transmission are in microprocessor and obtain "on" position, gate-dividing state and closing locking state and show;
Microprocessor be also connected with for power not between power failure source;
Microprocessor is also connected with USB communication module, for typing in the microprocessor or upgrade system program;
Microprocessor is also connected with GPRS communication module, for Remote Acquisitioning combined floodgate, separating brake, combined floodgate unblock, closing locking instruction and operation password, and "on" position, gate-dividing state and closing locking state is sent;
Display module, key circuit, not between power failure source, USB communication module and GPRS communication module be all arranged in control cabinet.
For a control method for the grid side anti-islanding system that distributed photovoltaic generates electricity by way of merging two or more grid systems, comprise the following steps:
A, when in user side, manually opening button carries out sub-switching operation:
A, press manual brake separating button after unclamp, the coil of switching winding FJ obtains and electricly carries out separating brake action, and the first normally-closed contact FJ1 disconnects, thus shutting-brake control loop is disconnected, the coil losing electricity of closing coil HJ, the first normally opened contact HJ1, the second normally opened contact HJ2 all disconnect, the power-off of shutting-brake control loop, second normally-closed contact HJ2 closes, the coil of switching winding FJ continues electric, and the 4th normally opened contact HJ4 disconnects, and combined floodgate warning light HD extinguishes, 5th normally opened contact FJ3 closes, and separating brake warning light LD lights;
Gate-dividing state and closing locking state show in real time by b, microprocessor on display module, if closing locking contact BS is still in closure state, then by the instruction of key circuit input closing locking, microprocessor controls closing locking contact BS and obtains electric disconnection after receiving closing locking instruction, during successful closing locking, key circuit cannot input closing locking instruction;
Gate-dividing state and closing locking status remote are transferred to server by GPRS communication module by c, microprocessor, client-access server obtains gate-dividing state and closing locking state, if closing locking contact BS is still in closure state, closing locking instruction is transferred to microprocessor by Server remote by client, Microprocessor S3C44B0X closing locking contact BS obtains electric disconnection, and during successful closing locking, client cannot input closing locking instruction;
B, when sub-switching operation is carried out by key circuit in user side:
D, when being in "on" position, reclosing command cannot be keyed in by key circuit, closing locking instruction and carry out combined floodgate unlocking operation, according to the operation interface of separating brake and closing locking, separating brake instruction is keyed in microprocessor by key circuit, the of short duration closed rear disconnection of Microprocessor S3C44B0X remote control separating brake contact K2, after success separating brake, key circuit inputs closing locking instruction again, Microprocessor S3C44B0X closing locking contact BS obtains electric disconnection, after success closing locking, key circuit cannot input closing locking instruction again, the coil of switching winding FJ obtains and electricly carries out separating brake action, first normally-closed contact FJ1 disconnects, thus shutting-brake control loop is disconnected, the coil losing electricity of closing coil HJ, first normally opened contact HJ1, second normally opened contact HJ2 all disconnects, the power-off of shutting-brake control loop, second normally-closed contact HJ2 closes, the coil of switching winding FJ continues electric, 4th normally opened contact HJ4 disconnects, combined floodgate warning light HD extinguishes, 5th normally opened contact FJ3 closes, separating brake warning light LD lights,
Gate-dividing state and closing locking status remote are transferred to server by GPRS communication module by e, microprocessor, client-access server obtains gate-dividing state and closing locking state, if closing locking contact BS is still in closure state, closing locking instruction is transferred to microprocessor by Server remote by client, Microprocessor S3C44B0X closing locking contact BS obtains electric disconnection, and during successful closing locking, client cannot input closing locking instruction;
C, when carrying out long-range sub-switching operation:
F, when being in "on" position, client cannot input reclosing command, closing locking instruction and combined floodgate unlock command, separating brake instruction is transferred to microprocessor by Server remote by client, microprocessor is received by GPRS communication module and controls the of short duration closed rear disconnection of remote control separating brake contact K2, success separating brake after client again by closing locking command to microprocessor, closing locking contact BS obtains electric disconnection, after success closing locking, client cannot input closing locking instruction again, the coil of switching winding FJ obtains and electricly carries out separating brake action, first normally-closed contact FJ1 disconnects, thus make the power-off of shutting-brake control loop, the coil losing electricity of closing coil HJ, first normally opened contact HJ1, second normally opened contact HJ2 all disconnects, the power-off of shutting-brake control loop, second normally-closed contact HJ2 closes, the coil of switching winding FJ continues electric, 4th normally opened contact HJ4 disconnects, combined floodgate warning light HD extinguishes, 5th normally opened contact FJ3 closes, separating brake warning light LD lights,
D, when closing operation is carried out in user side:
G, when being in gate-dividing state, separating brake instruction cannot be keyed in by key circuit, after user obtains operation password, display module ejection operation password entry interface, unlocked by key circuit input operation password according to operation password entry interface, Microprocessor S3C44B0X closing locking contact BS dead electricity closes, and after successful unlock, key circuit cannot carry out combined floodgate unlocking operation again;
H, key in reclosing command by key circuit, disconnect after Microprocessor S3C44B0X remote control closing contact K1 is closed, or unclamp after pressing closing by hand button AH, 3rd normally opened contact FJ1 is in closure state, the conducting of shutting-brake control loop, the coil of closing coil HJ obtains and electricly carries out feed motion, second normally-closed contact HJ3 disconnects, the coil losing electricity of switching winding FJ, first normally-closed contact FJ2 closes, and the closed also self-sustaining of the first normally opened contact HJ1 and the second normally opened contact HJ2, makes shutting-brake control loop constant conduction, and the warning light HD that closes a floodgate lights, separating brake warning light LD extinguishes;
E, carry out remote switching operation time:
I, when being in gate-dividing state, client cannot input separating brake instruction, ejection operation password input dialogue frame in client, user will operate password input client, client will operate password, combined floodgate unlock command and reclosing command are transferred to microprocessor by Server remote, microprocessor receives and controls closing locking contact BS dead electricity and closes and the of short duration closed rear disconnection of remote control closing contact K1, after successful unlock, client cannot carry out combined floodgate unlocking operation again, 3rd normally opened contact FJ1 is in closure state, the conducting of shutting-brake control loop, the coil of closing coil HJ obtains and electricly carries out feed motion, second normally-closed contact HJ3 disconnects, the coil losing electricity of switching winding FJ, first normally-closed contact FJ2 closes, the closed also self-sustaining of first normally opened contact HJ1 and the second normally opened contact HJ2, make shutting-brake control loop constant conduction, and the warning light HD that closes a floodgate lights, separating brake warning light LD extinguishes,
Between F, server and microprocessor and/or client after communicating interrupt when this connects, "on" position, gate-dividing state and closing locking state are sent to server by microprocessor immediately, server in real time by "on" position, gate-dividing state and closing locking state synchronized to client.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on specification, must determine its technical scope according to right.
Claims (10)
1. a grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic, it is characterized in that: comprise grid-connected switch cubicle, the secondary circuit of described grid-connected switch cubicle comprises closing coil HJ, switching winding FJ, remote control closing contact K1, remote control separating brake contact K2, closing by hand button AH, manual brake separating button AF, closing locking contact BS, first normally opened contact HJ1, second normally opened contact HJ2, 3rd normally opened contact FJ1, first normally-closed contact FJ2 and the second normally-closed contact HJ3, described closing coil HJ controls described first normally opened contact HJ1, second normally opened contact HJ2 and the second normally-closed contact HJ3, described switching winding FJ controls the 3rd normally opened contact FJ1 and the first normally-closed contact FJ2, described closing locking contact BS is normally-closed contact,
It is in parallel with remote control closing contact K1 and closing by hand button AH respectively after described first normally opened contact HJ1 connects with the first normally-closed contact FJ2, and a termination first power end KM+, the two ends of the second normally opened contact HJ2 are connected in parallel on after described closing locking contact BS connects with the 3rd normally opened contact FJ1, and one end and the first normally-closed contact FJ2, closing by hand button AH is connected with other one end of remote control closing contact K1, the coil two ends of described closing coil HJ are connected with other one end of described second normally opened contact HJ2 and the 3rd normally opened contact FJ1 and second source end KM-respectively, thus form shutting-brake control loop,
A termination first power end KM+ after described second normally-closed contact HJ3 is in parallel with described remote control separating brake contact K2 and manual brake separating button AF respectively, one end is connected with coil one end of described switching winding FJ in addition, another termination second source end of the coil of described switching winding FJ KM-, thus form separating brake control loop.
2. the grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic as claimed in claim 1, it is characterized in that: also comprise combined floodgate warning light HD, separating brake warning light LD, 4th normally opened contact HJ4 and the 5th normally opened contact FJ3, described closing coil HJ controls described 4th normally opened contact HJ4, described switching winding FJ controls described 5th normally opened contact FJ3, described first power end KM+, combined floodgate warning light HD, 4th normally opened contact HJ4 and second source end KM-connects successively and forms prompting loop of closing a floodgate, described first power end KM+, separating brake warning light LD, 5th normally opened contact FJ3 and second source end KM-connects successively and forms separating brake prompting loop.
3. the grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic as claimed in claim 2, it is characterized in that: also comprise control cabinet, the microprocessor of built-in system program is provided with in described control cabinet, the closed procedure of combined floodgate latch contact BS is encrypted, control closing locking contact BS dead electricity when obtaining operation password and combined floodgate unlock command at the same time to close, described microprocessor points out loop to be connected with described shutting-brake control loop, separating brake control loop and separating brake, and described have for microprocessor
Combined floodgate input, connects described remote control closing contact K1, and microprocessor receives reclosing command, controls described remote control closing contact K1 and closes;
Separating brake input, connects described remote control separating brake contact K2, and microprocessor receives separating brake instruction, controls described remote control separating brake contact K2 and closes;
Closing locking input, connects described closing locking contact BS, and microprocessor receives closing locking instruction or combined floodgate unlock command, controls closing locking contact BS and disconnects or close.
4. the grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic as claimed in claim 3, is characterized in that: described microprocessor is also connected with
Display module, display shutting-brake control loop, separating brake control loop, separating brake prompting loop and the real-time status of closing locking contact BS, display is closed a floodgate, the operation interface of separating brake and closing locking, when carrying out closing operation, display operation password entry interface;
Key circuit, for in shutting-brake control loop, separating brake control loop, separating brake prompting loop, closing locking contact BS real-time status display interface, combined floodgate, carry out handover operation between separating brake and the operation interface of closing locking, with by combined floodgate, separating brake, combined floodgate unlock and closing locking instruction be typed in microprocessor, when carrying out combined floodgate unlocking operation, for microprocessor input operation password.
5. the grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic as claimed in claim 4, it is characterized in that: described display module comprises touch liquid crystal screen and the first drive circuit, described key circuit comprises button and the second drive circuit, described button is the set of described touch liquid crystal screen upper local touch point, and described second drive circuit is integrated in the first drive circuit.
6. the grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic as claimed in claim 4, it is characterized in that: the client also comprising server and network with described server, described server and described microprocessor telecommunication, the built-in control software design of described client, for combined floodgate, separating brake, combined floodgate being unlocked by access services device, closing locking instruction and operation password remote transmission are in described microprocessor and obtain "on" position, gate-dividing state and closing locking state and show.
7. the grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic as claimed in claim 4, is characterized in that: described microprocessor be also connected with for power not between power failure source.
8. the grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic as claimed in claim 4, is characterized in that: described microprocessor is also connected with USB communication module, for typing in described microprocessor or renewal system program.
9. the grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic as claimed in claim 6, it is characterized in that: described microprocessor is also connected with GPRS communication module, for Remote Acquisitioning combined floodgate, separating brake, combined floodgate unblock, closing locking instruction and operation password, and "on" position, gate-dividing state and closing locking state are sent.
10. the control method of the grid side anti-islanding system of generating electricity by way of merging two or more grid systems for distributed photovoltaic according to any one of claim 1 ~ 9, is characterized in that: comprise the following steps:
A, when carrying out sub-switching operation in user side by described manual brake separating button:
A, unclamp after pressing described manual brake separating button, the coil of described switching winding FJ obtains and electricly carries out separating brake action, described first normally-closed contact FJ1 disconnects, thus shutting-brake control loop is disconnected, the coil losing electricity of described closing coil HJ, described first normally opened contact HJ1, second normally opened contact HJ2 all disconnects, the power-off of shutting-brake control loop, described second normally-closed contact HJ2 closes, the coil of described switching winding FJ continues electric, described 4th normally opened contact HJ4 disconnects, described combined floodgate warning light HD extinguishes, 5th normally opened contact FJ3 closes, described separating brake warning light LD lights,
Gate-dividing state and closing locking state show in real time by b, described microprocessor on display module, if described closing locking contact BS is still in closure state, then by the instruction of key circuit input closing locking, microprocessor controls closing locking contact BS and obtains electric disconnection after receiving closing locking instruction, during successful closing locking, key circuit cannot input closing locking instruction;
Gate-dividing state and closing locking status remote are transferred to server by GPRS communication module by c, described microprocessor, described client-access server obtains gate-dividing state and closing locking state, if described closing locking contact BS is still in closure state, closing locking instruction is transferred to microprocessor by Server remote by client, described Microprocessor S3C44B0X closing locking contact BS obtains electric disconnection, and during successful closing locking, client cannot input closing locking instruction;
B, when sub-switching operation is carried out by key circuit in user side:
D, when being in "on" position, reclosing command cannot be keyed in by key circuit, closing locking instruction and carry out combined floodgate unlocking operation, according to the operation interface of separating brake and closing locking, separating brake instruction is keyed in microprocessor by key circuit, the of short duration closed rear disconnection of remote control separating brake contact K2 described in described Microprocessor S3C44B0X, after success separating brake, key circuit inputs closing locking instruction again, Microprocessor S3C44B0X closing locking contact BS obtains electric disconnection, after success closing locking, key circuit cannot input closing locking instruction again, the coil of described switching winding FJ obtains and electricly carries out separating brake action, described first normally-closed contact FJ1 disconnects, thus shutting-brake control loop is disconnected, the coil losing electricity of described closing coil HJ, described first normally opened contact HJ1, second normally opened contact HJ2 all disconnects, the power-off of shutting-brake control loop, described second normally-closed contact HJ2 closes, the coil of described switching winding FJ continues electric, described 4th normally opened contact HJ4 disconnects, described combined floodgate warning light HD extinguishes, 5th normally opened contact FJ3 closes, described separating brake warning light LD lights,
Gate-dividing state and closing locking status remote are transferred to server by GPRS communication module by e, described microprocessor, described client-access server obtains gate-dividing state and closing locking state, if described closing locking contact BS is still in closure state, closing locking instruction is transferred to microprocessor by Server remote by client, described Microprocessor S3C44B0X closing locking contact BS obtains electric disconnection, and during successful closing locking, client cannot input closing locking instruction;
C, when carrying out long-range sub-switching operation:
F, when being in "on" position, client cannot input reclosing command, closing locking instruction and combined floodgate unlock command, separating brake instruction is transferred to microprocessor by Server remote by client, described microprocessor is received by GPRS communication module and controls the of short duration closed rear disconnection of described remote control separating brake contact K2, success separating brake after client again by closing locking command to microprocessor, closing locking contact BS obtains electric disconnection, after success closing locking, client cannot input closing locking instruction again, the coil of described switching winding FJ obtains and electricly carries out separating brake action, described first normally-closed contact FJ1 disconnects, thus make the power-off of shutting-brake control loop, the coil losing electricity of described closing coil HJ, described first normally opened contact HJ1, second normally opened contact HJ2 all disconnects, the power-off of shutting-brake control loop, described second normally-closed contact HJ2 closes, the coil of described switching winding FJ continues electric, described 4th normally opened contact HJ4 disconnects, described combined floodgate warning light HD extinguishes, 5th normally opened contact FJ3 closes, described separating brake warning light LD lights,
D, when closing operation is carried out in user side:
G, when being in gate-dividing state, separating brake instruction cannot be keyed in by key circuit, after user obtains operation password, display module ejection operation password entry interface, unlocked by key circuit input operation password according to operation password entry interface, described Microprocessor S3C44B0X closing locking contact BS dead electricity closes, and after successful unlock, key circuit cannot carry out combined floodgate unlocking operation again;
H, reclosing command is keyed in by key circuit, disconnect after Microprocessor S3C44B0X remote control closing contact K1 is closed, or unclamp after pressing closing by hand button AH, 3rd normally opened contact FJ1 is in closure state, the conducting of shutting-brake control loop, the coil of closing coil HJ obtains and electricly carries out feed motion, described second normally-closed contact HJ3 disconnects, the coil losing electricity of switching winding FJ, first normally-closed contact FJ2 closes, the closed also self-sustaining of first normally opened contact HJ1 and the second normally opened contact HJ2, make shutting-brake control loop constant conduction, and the warning light HD that closes a floodgate lights, separating brake warning light LD extinguishes,
E, carry out remote switching operation time:
I, when being in gate-dividing state, client cannot input separating brake instruction, ejection operation password input dialogue frame in client, user will operate password input client, client will operate password, combined floodgate unlock command and reclosing command are transferred to microprocessor by Server remote, described microprocessor receives and controls described closing locking contact BS dead electricity and closes and the of short duration closed rear disconnection of remote control closing contact K1, after successful unlock, client cannot carry out combined floodgate unlocking operation again, 3rd normally opened contact FJ1 is in closure state, the conducting of shutting-brake control loop, the coil of closing coil HJ obtains and electricly carries out feed motion, second normally-closed contact HJ3 disconnects, the coil losing electricity of switching winding FJ, first normally-closed contact FJ2 closes, the closed also self-sustaining of first normally opened contact HJ1 and the second normally opened contact HJ2, make shutting-brake control loop constant conduction, and the warning light HD that closes a floodgate lights, separating brake warning light LD extinguishes,
Between F, described server and microprocessor and/or client after communicating interrupt when this connects, "on" position, gate-dividing state and closing locking state are sent to server by described microprocessor immediately, described server in real time by "on" position, gate-dividing state and closing locking state synchronized to client.
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