CN205544606U - Many stations photovoltaic power generation system prevents island protection device - Google Patents
Many stations photovoltaic power generation system prevents island protection device Download PDFInfo
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- CN205544606U CN205544606U CN201620257828.XU CN201620257828U CN205544606U CN 205544606 U CN205544606 U CN 205544606U CN 201620257828 U CN201620257828 U CN 201620257828U CN 205544606 U CN205544606 U CN 205544606U
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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
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
Abstract
The utility model belongs to the technical field of photovoltaic power plant prevents island protection, especially, relate to a many stations photovoltaic power generation system prevents island protection device. The utility model provides a many stations photovoltaic power generation system prevents island protection device includes main website and at least one slave station, this main website is including protection action module and the communication module of main website, every slave station includes electric energy parameter module, line control module and slave station communication module, this electric energy parameter module is connected with this slave station communication module respectively with this line control module, this slave station communication module and the communication module of this main website are connected, the communication module of this main website and this protection action module are connected. The utility model provides a many stations photovoltaic power generation system prevents island protection device carries out integrated management by the main website to the little electrical power generating system's of photovoltaic isolated island state protection action everywhere to carry out isolated island state protection action by the slave station, consequently can avoid the public power grid's of system frequency and voltage great fluctuation to appear.
Description
Technical field
This utility model belongs to photovoltaic plant anti-isolated island resist technology field, particularly relates to a kind of many stations anti-orphan of photovoltaic generating system
Island protection device.
Background technology
Follow the principle of " generating power for their own use, surplus is surfed the Net ", generally multiple distributed photovoltaic power stations are passed through with system public electric wire net
Electric wiring couples together, and forms many stations photovoltaic generating system.Each distributed photovoltaic power station is in this system public electric wire net
A photovoltaic small power supply system, both for and site within the customer charge of local side powered, also be the system also outside site
The user load of grid side is powered.When system public electric wire net breaks down, system public electric wire net side would generally put into protection act,
Tripping is connected with some distributed photovoltaic power station and site switchs.Now these distributed photovoltaic power stations become the light that off-network is run
Volt small power supply system, is in island state.
During island state, the photovoltaic small power supply system that off-network is run produces bigger disturbance, local side user load is caused danger
Evil, damages as may result in user's electrical equipment, it could even be possible to local photovoltaic small power supply system crash can be directly resulted in.Separately
Outward, island state also makes and circuit between site and distributed photovoltaic station service transformer is charged, for system public electric wire net fault
Upkeep operation causes danger.Accordingly, it would be desirable to arrange anti-isolated island protection device, once detect that island state occurs, then provide anti-
Isolated island protective measure.
There is the multiple anti-isolated island protection device that may be provided in photovoltaic small power supply system at present, be in isolated island in photovoltaic small power supply system
During state, it is provided that anti-isolated island protective measure.But, the anti-isolated island protection in these scattering devices photovoltaic small power supply system throughout
Device takes isolated island protection act independently, and therefore, locally the impact of island state can be crossed and site to be diffused into system public
In common-battery net, system public electric wire net is impacted, cause the frequency of system public electric wire net and voltage that larger fluctuation occurs.
Utility model content
In view of in the photovoltaic generating system of many stations everywhere the anti-isolated island protection device in photovoltaic small power supply system take isolated island independently
The protection act phenomenon to impacting system public electric wire net, the utility model proposes a kind of many stations anti-orphan of photovoltaic generating system
Island protection device, including main website and at least one slave station, by the main website island state protection act to photovoltaic small power supply system everywhere
Carry out integrated management, and performed island state protection act by slave station, therefore, it is possible to avoid frequency and the voltage of system public electric wire net
Larger fluctuation occurs.
Many stations photovoltaic generating system in the many stations photovoltaic generating system anti-isolated island protection device that the utility model proposes includes
At least one photovoltaic small power supply system and system public electric wire net, this at least one photovoltaic small power supply system is connected to this system common electrical
In net；This many stations photovoltaic generating system anti-isolated island protection device includes main website and at least one slave station；This main website includes that protection is dynamic
Make module and Master station communication module；Each slave station is arranged in photovoltaic small power supply system；Each slave station include electrical energy parameter module,
LCM line control module and slave station communication module；This electrical energy parameter module and this LCM line control module are respectively with this slave station communication module even
Connect；This slave station communication module is connected with this Master station communication module；This Master station communication module is connected with this protection act module.
Further, the photovoltaic small power supply system of the many stations photovoltaic generating system anti-isolated island protection device that the utility model proposes sets
It is equipped with voltage transformer summation current transformer；This electrical energy parameter module is connected with this voltage transformer and this current transformer respectively.
Further, the photovoltaic small power supply system of the many stations photovoltaic generating system anti-isolated island protection device that the utility model proposes sets
It is equipped with grid-connected chopper or on-load switch；This LCM line control module is connected with this grid-connected chopper or this on-load switch respectively.
Further, the protection act module of the many stations photovoltaic generating system anti-isolated island protection device that the utility model proposes includes
Electric voltage exception protection submodule；This electric voltage exception protection submodule includes that voltage slippage protects switch, overvoltage protection switch, voltage
Comparison circuit group, voltage slippage comparison circuit group, voltage slippage the first logic sum gate circuit, voltage slippage the second logic sum gate electricity
Road, voltage logic OR circuit, voltage protection logical AND gate circuit and the electric voltage exception time relay；This voltage comparator circuit group
It is connected with this voltage logic OR circuit；This voltage slippage comparison circuit group is connected with this voltage slippage the first logic sum gate circuit；
This voltage slippage protection switch and this voltage slippage the first logic sum gate circuit respectively with this voltage slippage the second logic sum gate circuit
Connect；This overvoltage protection switch, this voltage logic OR circuit and this voltage slippage the second logic sum gate circuit respectively with this voltage
Relay protective scheme AND circuit connects；This voltage protection logical AND gate circuit is also connected with this electric voltage exception time relay；This voltage
Comparison circuit group includes the first voltage comparator circuit, the second voltage comparator circuit and tertiary voltage comparison circuit；This voltage slippage ratio
Relatively circuit group includes the first voltage slippage comparison circuit, the second voltage slippage comparison circuit and tertiary voltage slippage comparison circuit.
Further, the protection act module of the many stations photovoltaic generating system anti-isolated island protection device that the utility model proposes includes
Zero sequence overvoltage protection submodule；This zero sequence overvoltage protection submodule include zero sequence overvoltage protection switch, residual voltage comparison circuit,
Zero sequence overvoltage protection logical AND gate circuit and the zero sequence overvoltage time relay；This zero sequence overvoltage protection switch and this residual voltage compare
Circuit is connected with this zero sequence overvoltage protection logical AND gate circuit respectively；This zero sequence overvoltage protection logical AND gate circuit also with this zero sequence mistake
The pressure time relay connects.
Further, the protection act module of the many stations photovoltaic generating system anti-isolated island protection device that the utility model proposes includes
Frequency anomaly protection submodule；This frequency anomaly protection submodule includes over frequency protection switch, frequency comparison circuit, frequency slip frequency
Protection switch, frequency slip frequency comparison circuit, low-voltage dead lock protection switch, low pressure comparison circuit group, current detection switch, electric current
Comparison circuit group, frequency slip frequency logic sum gate circuit, low-voltage dead lock relay protective scheme OR circuit, current protection the first logic sum gate
Circuit, current protection the second logic sum gate circuit, frequency anomaly relay protective scheme AND circuit and the frequency anomaly time relay.Should
Low-voltage dead lock protection switch and this low-pressure ratio relatively electric circuit component are not connected with this low-voltage dead lock relay protective scheme OR circuit；This frequency is sliding
Difference protection switch and this frequency slip frequency comparison circuit are connected with this frequency slip frequency logic sum gate circuit respectively；This current comparison circuit group
It is connected with this current protection the first logic sum gate circuit；This current detection switch and this current protection the first logic sum gate circuit are respectively
It is connected with this current protection the second logic sum gate circuit；This over frequency protection switch, this frequency comparison circuit, this frequency slip frequency logic
OR circuit, this low-voltage dead lock relay protective scheme OR circuit, this current protection the second logic sum gate circuit respectively with this frequency anomaly
Relay protective scheme AND circuit connects；This frequency anomaly relay protective scheme AND circuit is also connected with this frequency anomaly time relay；Should
Current comparison circuit group is for comparing the size of three-phase alternating current and current setting.
Further, the slave station of the many stations photovoltaic generating system anti-isolated island protection device that the utility model proposes also includes that hardware is certainly
Inspection module；This hardware check module is connected with this electrical energy parameter module；This hardware check module is provided with status indicator lamp or buzzing
Device.
Further, the slave station of the many stations photovoltaic generating system anti-isolated island protection device that the utility model proposes also includes that slave station is patrolled
Collect module and off-grid configuration module；This slave station logic module is connected with this electrical energy parameter module and this LCM line control module respectively；Should
Off-grid configuration module is connected with this slave station logic module.
Further, the slave station logic module of the many stations photovoltaic generating system anti-isolated island protection device that the utility model proposes also with
This slave station communication module connects.
Further, the slave station communication module of the many stations photovoltaic generating system anti-isolated island protection device that the utility model proposes or master
Communication module of standing includes fiber optical transceiver.
Compared with prior art, the many stations photovoltaic generating system anti-isolated island protection device that the utility model proposes, including main website and
At least one slave station, is carried out integrated management by main website to the island state protection act of photovoltaic small power supply system everywhere, and by slave station
Perform island state protection act, therefore, it is possible to avoid the frequency of system public electric wire net and voltage that larger fluctuation occurs.
Accompanying drawing explanation
Accompanying drawing herein is merged in description and constitutes the part of this specification, it is shown that meet enforcement of the present utility model
Example, and be used for explaining principle of the present utility model together with description.
Fig. 1 is the composition schematic diagram of this utility model embodiment many stations photovoltaic generating system anti-isolated island protection device；
Fig. 2 be this utility model embodiment many stations photovoltaic generating system anti-isolated island protection device form schematic diagram in detail；
Fig. 3 is the electric voltage exception protection submodule of this utility model embodiment many stations photovoltaic generating system anti-isolated island protection device main website
The circuit diagram of block；
Fig. 4 is the zero sequence overvoltage protection submodule of this utility model embodiment many stations photovoltaic generating system anti-isolated island protection device main website
The circuit diagram of block；
Fig. 5 is the frequency anomaly protection submodule of this utility model embodiment many stations photovoltaic generating system anti-isolated island protection device main website
The circuit diagram of block；
Fig. 6 be this utility model embodiment many stations photovoltaic generating system anti-isolated island protection device slave station form schematic diagram in detail；
Wherein,
10 main websites；
11 protection act modules；
12 Master station communication modules；
20 slave stations；
21 electrical energy parameter modules；
22 LCM line control modules；
23 slave station communication modules；
24 slave station logic modules；
25 off-grid configuration modules；
26 hardware check modules；
30 electric voltage exception protection submodules；
31 overvoltage protection switchs；
32 voltage comparator circuit groups；
321 first voltage comparator circuits；
322 second voltage comparator circuits；
323 tertiary voltage comparison circuits；
33 voltage slippage protection switches；
34 voltage slippage comparison circuit groups；
341 first voltage slippage comparison circuits；
342 first voltage slippage comparison circuits；
343 first voltage slippage comparison circuits；
35 voltage slippage the first logic sum gate circuit；
36 voltage slippage the second logic sum gate circuit；
37 voltage logic OR circuits；
38 voltage protection logical AND gate circuit；
The 39 electric voltage exception time relays；
40 zero sequence overvoltage protection submodules；
41 zero sequence overvoltage protection switchs；
42 residual voltage comparison circuits；
43 zero sequence overvoltage protection logical AND gate circuit；
The 44 zero sequence overvoltage time relays；
50 frequency anomaly protection submodules；
51 over frequency protection switches；
52 frequency comparison circuits；
53 frequency slip frequency protection switches；
54 frequency slip frequency comparison circuits；
55 low-voltage dead lock protection switches；
56 low pressure comparison circuits；
57 current detection switches；
58 current comparison circuit groups；
59 frequency slip frequency logic sum gate circuit；
61 low-voltage dead lock relay protective scheme OR circuits；
62 current protection the first logic sum gate circuit；
63 current protection the first logic sum gate circuit；
64 frequency anomaly relay protective scheme AND circuits；
The 65 frequency anomaly time relays；
71 voltage transformers；
72 current transformers；
81 grid-connected choppers；
82 on-load switches.
Detailed description of the invention
For making the purpose of the application, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in embodiment, to embodiment
In technical scheme be clearly and completely described, it is clear that described embodiment is only some embodiments of the present application, and
It is not all of embodiment.Based on the embodiment be given, those of ordinary skill in the art are institute under not making creative work premise
The every other embodiment obtained, broadly falls into the scope of the application protection.
It should be noted that in the art, the grid-connected open circuit in current transformer, voltage transformer, circuit and circuit
The switching device such as device and load switch etc. is common component in power system, is not also the improvements place of the application, so
The most no longer elaborate the switching device in current transformer, voltage transformer, circuit and the concrete structure of circuit and
Operation principle.Meanwhile, in this application, its 26S Proteasome Structure and Function is not typically described in detail by other conventional devices of employing.
It addition, all of comprising modules is all the hardware module being independently arranged in following embodiment.It addition, in some applications, grid-connected
Point switch refers to same physical hardware with grid-connected chopper.
As it is shown in figure 1, the many stations photovoltaic generating system bag in the present embodiment many stations photovoltaic generating system anti-isolated island protection device
Including at least one photovoltaic small power supply system and system public electric wire net, at least one photovoltaic small power supply system is connected to system public electric wire net
In.Photovoltaic generating system anti-isolated island protection device in the present embodiment many stations includes main website 10 and at least one slave station 20；Main website 10
Including protection act module 11 and Master station communication module 12；Each slave station 10 is arranged in a photovoltaic small power supply system；Each
Slave station 10 includes electrical energy parameter module 21, LCM line control module 22 and slave station communication module 23；Electrical energy parameter module 21 and line
Road control module 22 is connected with slave station communication module 23 respectively；Slave station communication module 23 is connected with Master station communication module 12；Main
Communication module of standing 12 is connected with protection act module 11.
When specifically applying, electrical energy parameter module 21 generates electrical energy parameter and is sent to slave station communication module；Master station communication module
12 receive slave station communication module sends the electrical energy parameter of coming, and is sent to protection act module 11；Protection act module 11 then root
According to predetermined anti-isolated island Preservation tactics, generate the protection instruction of anti-isolated island, and by Master station communication module 12 by this anti-isolated island
Protection instruction is sent to the first slave station and the slave station communication module of the second slave station of correspondence；The slave station communication module of this first slave station will
The protection instruction of this anti-isolated island is sent to the LCM line control module of the first slave station, by the LCM line control module of the first slave station to the first photovoltaic
The circuit of small power supply system puts into anti-isolated island protection act；The slave station communication module of this second slave station is by the protection instruction of this anti-isolated island
It is sent to the LCM line control module of the second slave station, by the LCM line control module of the second slave station in the second photovoltaic small power supply system line
Put into anti-isolated island protection act.
Wherein, protection act module is according to the priority of each slave station, user's load condition of each slave station, the topological structure of each slave station
Instruct Deng generating the protection of anti-isolated island.
The present embodiment many stations photovoltaic generating system anti-isolated island protection device, including main website and at least one slave station, by main website to respectively
The island state protection act of place's photovoltaic small power supply system carries out integrated management, and is performed island state protection act by slave station, because of
This is it can be avoided that larger fluctuation occur in the frequency of system public electric wire net and voltage.
As in figure 2 it is shown, the photovoltaic small power supply system of the present embodiment many stations photovoltaic generating system anti-isolated island protection device can also set
It is equipped with voltage transformer 71 summation current transformer 72；Electrical energy parameter module 21 the most respectively with voltage transformer 71 and Current Mutual Inductance
Device 72 connects.
When specifically applying, electrical energy parameter module 21 is connected with voltage transformer 71 summation current transformer 72 respectively, is used for receiving
Three-phase voltage on the photovoltaic small power supply system test line of voltage transformer 71 summation current transformer 72 perception, electric current are also carried out
Various electrical energy parameters calculate, such as harmonic data.
As in figure 2 it is shown, the photovoltaic small power supply system of the present embodiment many stations photovoltaic generating system anti-isolated island protection device also can be arranged
There are grid-connected chopper 81 or on-load switch 82；LCM line control module 22 the most respectively with grid-connected chopper 81 or on-load switch 82
Connect.
When specifically applying, LCM line control module 22 is connected with grid-connected chopper 81 or on-load switch 82 the most respectively, to grid-connected disconnected
Road device 81 or on-load switch 82 send combined floodgate or separating brake control instruction so that grid-connected chopper 81 or on-load switch 82 close
Or cut off.
As it is shown on figure 3, the protection act module 11 of the present embodiment many stations photovoltaic generating system anti-isolated island protection device can also be wrapped
Include electric voltage exception protection submodule 30；Electric voltage exception protection submodule 30 includes that voltage slippage protection switch 33, overvoltage protection are opened
Pass 31, voltage comparator circuit group 32, voltage slippage comparison circuit group 34, voltage slippage the first logic sum gate circuit 35, voltage
When slippage the second logic sum gate circuit 36, voltage logic OR circuit 37, voltage protection logical AND gate circuit 38 and electric voltage exception
Between relay 39.Voltage comparator circuit group 32 is connected with voltage logic OR circuit 37；Voltage slippage comparison circuit group 34 with
Voltage slippage the first logic sum gate circuit 35 connects；Voltage slippage protection switch 33 and voltage slippage the first logic sum gate circuit 35
It is connected with voltage slippage the second logic sum gate circuit 36 respectively；Overvoltage protection switch 31, voltage logic OR circuit 37 and voltage
Slippage the second logic sum gate circuit 36 is connected with voltage protection logical AND gate circuit 38 respectively；Voltage protection logical AND gate circuit 38
Also it is connected with the electric voltage exception time relay 39；Voltage comparator circuit group 32 includes first voltage comparator circuit the 321, second electricity
Pressure comparison circuit 322 and tertiary voltage comparison circuit 323；Voltage slippage comparison circuit group 34 includes that the first voltage slippage is more electric
Road the 341, second voltage slippage comparison circuit 342 and tertiary voltage slippage comparison circuit 343.
First voltage comparator circuit the 321, second voltage comparator circuit 322 when specifically applying, in voltage comparator circuit group 32
It is respectively used to compare voltage Uab, Ubc, Uca with overvoltage setting valve with tertiary voltage comparison circuit 323.When Uab,
When Ubc or Uca is more than and is equal to overvoltage setting valve, first voltage comparator circuit the 321, second voltage comparator circuit 322 or the
Three voltage comparator circuits 323 export logic 1；When Uab, Ubc or Uca are less than overvoltage setting valve, the first voltage comparator circuit
321, the second voltage comparator circuit 322 or tertiary voltage comparison circuit 323 export logical zero.
First voltage slippage comparison circuit the 341, second voltage slippage when specifically applying, in voltage slippage comparison circuit group 34
Comparison circuit 342 and tertiary voltage slippage comparison circuit 343 are respectively used to voltage slippage dUab/dt, dUbc/dt, or
DUca/dt compares with voltage slippage setting valve.Work as dUab/dt, dUbc/dt or dUca/dt to be more than and sliding equal to voltage
During difference setting valve, first voltage slippage comparison circuit the 341, second voltage slippage comparison circuit 342 or tertiary voltage slippage compare
Circuit 343 exports logic 1；When working as dUab/dt, dUbc/dt or dUca/dt less than voltage slippage setting valve, the first voltage
Slippage comparison circuit the 341, second voltage slippage comparison circuit 342 or tertiary voltage slippage comparison circuit 343 export logical zero.
When specifically applying, the logic of voltage slippage protection switch is set as: during voltage slippage protection switch Guan Bi, be defined as patrolling
Collect 0；When the protection of voltage slippage switches off, it is defined as logic 1.
When specifically applying, the logic of overvoltage protection switch is set as: during overvoltage protection switch Guan Bi, be defined as logical zero；Overvoltage
When protection switches off, it is defined as logic 1.
When specifically applying, when being more than overvoltage setting valve any one of three-phase voltage, and overvoltage protection switch Guan Bi；And voltage is sliding
Difference protection switch Guan Bi, and more than voltage slippage definite value any one of three-phase voltage slippery difference, the most now can determine that as electric voltage exception
State；If electric voltage exception state continue, and reach the electric voltage exception time relay 39 set setting time after, output electricity
Pressure abnormal protection action.
The electric voltage exception protection submodule of the protection act module of the present embodiment many stations photovoltaic generating system anti-isolated island protection device
For the hardware module being independently arranged, electric voltage exception defencive function can be realized.
As shown in Figure 4, the protection act module of the present embodiment many stations photovoltaic generating system anti-isolated island protection device can also include
Zero sequence overvoltage protection submodule 40；Zero sequence overvoltage protection submodule 40 includes that zero sequence overvoltage protection switch 41, residual voltage compare
Circuit 42, zero sequence overvoltage protection logical AND gate circuit 43 and the zero sequence overvoltage time relay 44；Zero sequence overvoltage protection switch 41
It is connected with zero sequence overvoltage protection logical AND gate circuit 43 respectively with residual voltage comparison circuit 42；Zero sequence overvoltage protection logical AND gate
Circuit 43 is also connected with the zero sequence overvoltage time relay 44.
When specifically applying, residual voltage comparison circuit 42 is used for the self-produced residual voltage after relatively more current conversion and residual voltage
The size of setting valve.
When specifically applying, when self-produced zero sequence is equal to or more than 5V, residual voltage comparison circuit 42 exports logic 1；When certainly
When producing zero sequence less than 5V, residual voltage comparison circuit 42 exports logical zero.
Preferably, the logic of zero sequence overvoltage protection switch is set as: during zero sequence overvoltage protection switch Guan Bi, be defined as logic 1；Zero
During sequence overvoltage protection switch Guan Bi, it is defined as logical zero.
When zero sequence overvoltage protection switch closes, and residual voltage is more than 5V, the most now can determine that as zero sequence overvoltage condition；If zero sequence
Overvoltage condition continue, and reach the zero sequence overvoltage time relay 44 set setting time after, export zero sequence overvoltage protection action.
The zero sequence overvoltage protection submodule of the protection act module of the present embodiment many stations photovoltaic generating system anti-isolated island protection device
For the hardware module being independently arranged, zero sequence over-voltage protecting function can be realized.
As it is shown in figure 5, the protection act module of the present embodiment many stations photovoltaic generating system anti-isolated island protection device can also include
Frequency anomaly protection submodule 50；Frequency anomaly protection submodule 50 include over frequency protection switch 51, frequency comparison circuit 52,
Frequency slip frequency protection switch 53, frequency slip frequency comparison circuit 54, low-voltage dead lock protection switch 55, low pressure comparison circuit 56, electricity
Stream detection switch 57, current comparison circuit group 58, frequency slip frequency logic sum gate circuit 59, low-voltage dead lock relay protective scheme or door electricity
Road 61, current protection the first logic sum gate circuit 62, current protection the second logical AND gate circuit 63, frequency anomaly relay protective scheme
AND circuit 64 and the frequency anomaly time relay 65.Low-voltage dead lock protection switch 55 and low pressure comparison circuit 56 are respectively with low
Press off lock relay protective scheme OR circuit 61 to connect；Frequency slip frequency protection switch 53 and frequency slip frequency comparison circuit 54 are respectively with frequently
Rate slippage logic sum gate circuit 59 connects；Current comparison circuit group 58 is connected with current protection the first logic sum gate circuit 62；
Current detection switch 57 and current protection the first logic sum gate circuit 62 are respectively with current protection the second logic sum gate circuit 63 even
Connect；Over frequency protection switch 51, frequency comparison circuit 52, frequency slip frequency logic sum gate circuit 59, low-voltage dead lock relay protective scheme or
Gate circuit 61 and current protection the second logic sum gate circuit 63 are connected with frequency anomaly relay protective scheme AND circuit 64 respectively；Frequently
Rate abnormal protection logical AND gate circuit 64 is also connected with the frequency anomaly time relay 65；Current comparison circuit group 58 for than
Relatively three-phase alternating current and the size of current setting.
When specifically applying, current comparison circuit group 58 can include three current comparison circuits, be respectively used to by electric current Ia, Ib,
Ic compares with current setting.When Ia, Ib or Ic are more than and are equal to current setting, current comparison circuit output is patrolled
Collect 1；When Ia, Ib or Ic are less than current setting, current comparison circuit output logical zero.
When specifically applying, low pressure comparison circuit 56 is for comparing line voltage Uab with low pressure setting valve.When Uab is big
In with during equal to low pressure setting valve, low pressure comparison circuit 56 exports logic 1；When Uab is less than low pressure setting valve, low-pressure ratio is relatively
Circuit 56 exports logical zero.
When specifically applying, the logic of over frequency protection switch is set as: during over frequency protection switch Guan Bi, be defined as logic 1；Overfrequency
When protection switches off, it is defined as logical zero.
When specifically applying, the logic of frequency slip frequency protection switch is set as: during frequency slip frequency protection switch Guan Bi, be defined as patrolling
Collect 0；When frequency slip frequency protection switches off, it is defined as logical zero.
When specifically applying, the logic of low-voltage dead lock protection switch is set as: during low-voltage dead lock protection switch Guan Bi, be defined as patrolling
Collect 0；When low-voltage dead lock protection switches off, it is defined as logic 1.
When specifically applying, the logic of current detection switch is set as: during current detection switch Guan Bi, be defined as logical zero；Electricity
During stream detection switch Guan Bi, it is defined as logic 1.
When specifically applying, work as frequency slip frequency, i.e. frequency changing value within the unit interval, overfrequency slippage setting valve, and
Frequency slip frequency protection switch Guan Bi；And current detection switch Guan Bi, and more than current setting any one of three-phase electricity flow valuve；And
Low-voltage dead lock protection switch Guan Bi, and line voltage Uab is more than or equal to low pressure setting valve；And over frequency protection switch Guan Bi, and currently
Frequency values overfrequency setting valve, the most now can determine that as frequency anomaly state；If frequency anomaly state continues, and reaches frequency
After the setting time that abnormal time relay 65 sets, output frequency abnormal protection action.
The frequency anomaly protection submodule of the protection act module of the present embodiment many stations photovoltaic generating system anti-isolated island protection device
For the hardware module for being independently arranged, frequency anomaly defencive function can be realized.
Preferably, the low pressure setting valve in above-described embodiment, overvoltage setting valve, current setting, voltage slippage setting valve, zero
The default setting valves such as sequence voltage setting valve, frequency setting value and frequency slip frequency setting valve can be arranged by interactive electronic device,
Such as setting button or setting panel.
Preferably, the protection of the electric voltage exception in above-described embodiment submodule, zero sequence overvoltage protection submodule and frequency anomaly protection
Module can use on-site programmable gate array FPGA (FPGA:Field-Programmable Gate Array) module or multiple
Miscellaneous programmable logic device (CPLD) (CPLD:Complex Programmable Logic Device) module and the periphery of necessity
Hardware circuit realizes.
As shown in Figure 6, the slave station of the present embodiment many stations photovoltaic generating system anti-isolated island protection device also includes hardware check module
26；Hardware check module 26 is connected with electrical energy parameter module 21；Hardware check module 26 is provided with status indicator lamp or buzzing
Device.
When specifically applying, the hardware check module of the slave station of the present embodiment many stations photovoltaic generating system anti-isolated island protection device is used
Slave station in isolated island protection device anti-to many stations photovoltaic generating system carries out hardware fault self-inspection, and when fault being detected, logical
Cross status indicator lamp or buzzer report faults itself.
As shown in Figure 6, the slave station of the present embodiment many stations photovoltaic generating system anti-isolated island protection device can also include slave station logic
Module 24 and off-grid configuration module 25；Slave station logic module 24 respectively with electrical energy parameter module 21 and LCM line control module 22
Connect；Off-grid configuration module 25 is connected with slave station logic module 24.
When specifically applying, the off-grid configuration module 24 of the slave station of the present embodiment many stations photovoltaic generating system anti-isolated island protection device
For carrying out off-grid configuration and the Back ground Informations such as the Protection parameters after configuration being sent to slave station logic module.
Preferably, first off-grid configuration carries out the operable purview certification of user, then carries out off-grid operational factor, Protection parameters
Arrange.
Preferably, off-grid configuration module 25 includes being manually entered keyboard.
Slave station logic module 24 is connected with off-grid configuration module 25 and LCM line control module 22 respectively.Electrical energy parameter module 21 is adopted
Three-phase voltage on collection test line and three-phase current also carry out various electrical energy parameter calculating and sending and deliver to slave station logic module 24, from
Logic module of standing 24 receives off-grid configuration module 25 and sends the Back ground Informations such as next Protection parameters, determines relay protective scheme and exports guarantor
Protect action to LCM line control module 22, and performed to close a floodgate or separating brake action by LCM line control module 22 so that grid-connected chopper
81 or on-load switch 82 close or cut off.
Preferably, slave station logic module 24 also includes electric voltage exception protection submodule, the zero sequence mistake of above-mentioned main website action protection module
Pressure protection submodule or frequency anomaly protection submodule, realize electric voltage exception defencive function, zero sequence over-voltage protecting function or frequency respectively
Rate abnormity protection function.
The slave station of the present embodiment many stations photovoltaic generating system anti-isolated island protection device adds slave station logic module and off-grid configuration mould
Block, it is achieved slave station departs from main website and independently carries out anti-island state protection, it is achieved the pattern of slave station active process island state on the spot.
As shown in Figure 6, the slave station logic module 24 of the present embodiment many stations photovoltaic generating system anti-isolated island protection device is gone back and slave station
Communication module 23 connects.
When specifically applying, the slave station logic module of the present embodiment many stations photovoltaic generating system anti-isolated island protection device also can be by this
The three-phase voltage of ground detection and three-phase current waveform and various electrical energy parameter are sent to master station communication mould by slave station communication module 23
Block 12, to report local runtime situation to main website.And the protection act module 11 of main website, then be additionally operable to preserve at least one from
The historgraphic data recording that station reports, it is simple to the maintenance in later stage and attendant carry out accident analysis use.
As shown in Figure 6, slave station communication module 23 or the main website of the present embodiment many stations photovoltaic generating system anti-isolated island protection device leads to
Letter module 12 includes fiber optical transceiver.
When specifically applying, the slave station of the present embodiment many stations photovoltaic generating system anti-isolated island protection device forms optical fiber office with main website
Territory net；Main website and slave station take master-slave topology structure, thus realize remote networking.
Preferably, main website can use Power PC Processor, and slave station can use arm processor, electrical energy parameter module can include AD7656
Bipolarity A/D chip.
Preferably, slave station can use ARM to combine dsp processor, and dsp processor can select the C674x series of TI company
C6748 industry rank；The data/address bus read-write mode using dual port RAM between slave station DSP and slave station ARM carries out data interaction.
In this application, unless otherwise clearly defined and limited, term " connects " and should be interpreted broadly, for example, it is possible to
It is fixing connection, it is also possible to be to removably connect, or integral；Can be to be mechanically connected, it is also possible to be electrical connection；Can be
It is joined directly together, it is also possible to be indirectly connected to by intermediary, can be connection or the phase interaction of two elements of two element internals
By relation.For the ordinary skill in the art, above-mentioned term tool in this application can be understood as the case may be
Body implication.
In the description of this specification, reference term " embodiment " and some embodiments " etc. description mean to combine this reality
Specific features, structure, material or the feature of executing example or example description are contained at least one embodiment of the application.At this
In description, the schematic representation of above-mentioned term is necessarily directed to identical embodiment.And, the specific features of description,
Structure, material or feature can be to combine in one or more embodiments in office in an appropriate manner.Additionally, the most conflicting
In the case of, the feature of the different embodiments described in this specification and different embodiment can be entered by those skilled in the art
Row combines and combination.
Although above it has been shown and described that embodiments herein, it is to be understood that above-described embodiment is exemplary,
It is not intended that the restriction to the application, above-described embodiment can be entered in scope of the present application by those of ordinary skill in the art
Row changes, revises, replaces and modification.
Being described above each embodiment of the present utility model, described explanation is exemplary, and non-exclusive, and also
It is not limited to disclosed each embodiment.In the case of the scope and spirit without departing from illustrated each embodiment, for this technology
For the those of ordinary skill in field, many modifications and changes will be apparent from.The selection of term used herein, it is intended to
Explain well the principle of each embodiment, actual application or the improvement to the technology in market, or make other of the art general
Logical technical staff is understood that each embodiment disclosed herein.
Those skilled in the art, after considering description and putting into practice disclosure disclosed herein, will readily occur to other enforcement of the disclosure
Scheme.The application is intended to any modification, purposes or the adaptations of the disclosure, these modification, purposes or adaptation
Property change follow the general principle of the disclosure and include the undocumented common knowledge in the art of the disclosure or usual skill
Art means.
Claims (10)
1. the photovoltaic generating system of station more than an anti-isolated island protection device, described many stations photovoltaic generating system includes at least one light
Volt small power supply system and system public electric wire net, at least one photovoltaic small power supply system described is connected in described system public electric wire net,
It is characterized in that, including main website and at least one slave station；
Described main website includes protection act module and Master station communication module；
Each described slave station is arranged in described photovoltaic small power supply system；
Each described slave station includes electrical energy parameter module, LCM line control module and slave station communication module；
Described electrical energy parameter module and described LCM line control module are connected with described slave station communication module respectively；
Described slave station communication module is connected with described Master station communication module；
Described Master station communication module is connected with described protection act module.
Many stations the most according to claim 1 photovoltaic generating system anti-isolated island protection device, it is characterised in that described photovoltaic
Small power supply system is provided with voltage transformer summation current transformer；
Described electrical energy parameter module is connected with described voltage transformer and described current transformer respectively.
Many stations the most according to claim 2 photovoltaic generating system anti-isolated island protection device, it is characterised in that described photovoltaic
Small power supply system is provided with grid-connected chopper or on-load switch；
Described LCM line control module is connected with described grid-connected chopper or described on-load switch respectively.
Many stations the most according to claim 3 photovoltaic generating system anti-isolated island protection device, it is characterised in that described protection
Action module includes that electric voltage exception protects submodule；
Described electric voltage exception protection submodule includes that voltage slippage protects switch, overvoltage protection switch, voltage comparator circuit group, electricity
Pressure slippage comparison circuit group, voltage slippage the first logic sum gate circuit, voltage slippage the second logic sum gate circuit, voltage logic or
Gate circuit, voltage protection logical AND gate circuit and the electric voltage exception time relay；
Described voltage comparator circuit group is connected with described voltage logic OR circuit；
Described voltage slippage comparison circuit group is connected with described voltage slippage the first logic sum gate circuit；
Described voltage slippage protection switch and described voltage slippage the first logic sum gate circuit are patrolled with described voltage slippage second respectively
Collect OR circuit to connect；
Described overvoltage protection switch, described voltage logic OR circuit and described voltage slippage the second logic sum gate circuit respectively with institute
State voltage protection logical AND gate circuit to connect；
Described voltage protection logical AND gate circuit is also connected with the described electric voltage exception time relay；
Described voltage comparator circuit group includes the first voltage comparator circuit, the second voltage comparator circuit and tertiary voltage comparison circuit；
Described voltage slippage comparison circuit group includes the first voltage slippage comparison circuit, the second voltage slippage comparison circuit and the 3rd electricity
Pressure slippage comparison circuit.
Many stations the most according to claim 3 photovoltaic generating system anti-isolated island protection device, it is characterised in that described protection
Action module includes zero sequence overvoltage protection submodule；
Described zero sequence overvoltage protection submodule includes that zero sequence overvoltage protection switch, residual voltage comparison circuit, zero sequence overvoltage protection are patrolled
Collect AND circuit and the zero sequence overvoltage time relay；
Described zero sequence overvoltage protection switch and described residual voltage comparison circuit respectively with described zero sequence overvoltage protection logical AND gate circuit
Connect；
Described zero sequence overvoltage protection logical AND gate circuit is also connected with the described zero sequence overvoltage time relay.
Many stations the most according to claim 3 photovoltaic generating system anti-isolated island protection device, it is characterised in that described protection
Action module includes that frequency anomaly protects submodule；
Described frequency anomaly protection submodule includes over frequency protection switch, frequency comparison circuit, frequency slip frequency protection switch, frequency
Slippage comparison circuit, low-voltage dead lock protection switch, low pressure comparison circuit, current detection switch, current comparison circuit group, frequency
Slippage logic sum gate circuit, low-voltage dead lock relay protective scheme OR circuit, current protection the first logic sum gate circuit, current protection
Two logic sum gate circuit, frequency anomaly relay protective scheme AND circuit and the frequency anomaly time relay；
Described low-voltage dead lock protection switch and described low pressure comparison circuit are respectively with described low-voltage dead lock relay protective scheme OR circuit even
Connect；
Described frequency slip frequency protection switch and described frequency slip frequency comparison circuit are respectively with described frequency slip frequency logic sum gate circuit even
Connect；
Described current comparison circuit group is connected with described current protection logic sum gate circuit；
Described current detection switch and described current protection the first logic sum gate circuit respectively with described current protection the second logic or
Gate circuit connects；
Described over frequency protection switch, described frequency comparison circuit, described frequency slip frequency logic sum gate circuit, described low-voltage dead lock are protected
Protect logic sum gate circuit, described current protection the second logic sum gate circuit respectively with described frequency anomaly relay protective scheme AND circuit even
Connect；
Described frequency anomaly relay protective scheme AND circuit is also connected with the described frequency anomaly time relay；
Described current comparison circuit group is for comparing the size of three-phase alternating current and current setting.
Many stations the most according to claim 1 photovoltaic generating system anti-isolated island protection device, it is characterised in that described slave station
Also include hardware check module；
Described hardware check module is connected with described electrical energy parameter module；
Described hardware check module is provided with status indicator lamp or buzzer.
Many stations the most according to any one of claim 1 to 7 photovoltaic generating system anti-isolated island protection device, its feature exists
In, described slave station also includes slave station logic module and off-grid configuration module；
Described slave station logic module is connected with described electrical energy parameter module and described LCM line control module respectively；
Described off-grid configuration module is connected with described slave station logic module.
Many stations the most according to claim 8 photovoltaic generating system anti-isolated island protection device, it is characterised in that described slave station
Logic module is also connected with described slave station communication module.
Many stations the most according to claim 1 photovoltaic generating system anti-isolated island protection device, it is characterised in that described from
Communication module of standing or described Master station communication module include fiber optical transceiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620257828.XU CN205544606U (en) | 2016-03-30 | 2016-03-30 | Many stations photovoltaic power generation system prevents island protection device |
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|---|---|---|---|
| CN201620257828.XU CN205544606U (en) | 2016-03-30 | 2016-03-30 | Many stations photovoltaic power generation system prevents island protection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107221917A (en) * | 2017-05-27 | 2017-09-29 | 中国能源建设集团甘肃省电力设计院有限公司 | A kind of centralized photovoltaic plant islet operation detecting method |
| CN107656149A (en) * | 2017-07-25 | 2018-02-02 | 许继电气股份有限公司 | A kind of open-delta injection type impedance detection isolated island method of discrimination |
-
2016
- 2016-03-30 CN CN201620257828.XU patent/CN205544606U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107221917A (en) * | 2017-05-27 | 2017-09-29 | 中国能源建设集团甘肃省电力设计院有限公司 | A kind of centralized photovoltaic plant islet operation detecting method |
| CN107656149A (en) * | 2017-07-25 | 2018-02-02 | 许继电气股份有限公司 | A kind of open-delta injection type impedance detection isolated island method of discrimination |
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