CN110365061A - A kind of control signaling method, control equipment and photovoltaic control system - Google Patents
A kind of control signaling method, control equipment and photovoltaic control system Download PDFInfo
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- CN110365061A CN110365061A CN201910765802.4A CN201910765802A CN110365061A CN 110365061 A CN110365061 A CN 110365061A CN 201910765802 A CN201910765802 A CN 201910765802A CN 110365061 A CN110365061 A CN 110365061A
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- 239000003990 capacitor Substances 0.000 claims description 18
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- H02J13/0062—
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- H02J3/383—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
- 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
Abstract
The invention discloses a kind of control signaling method, control equipment and photovoltaic control system, control equipment receives and parses through the synchronous alignment request of signal of control switching off device in the technical solution, obtains signal output parameter；Wherein, PV circuit switch of the switching off device between photovoltaic module and inverter；Synchronous alignment control signal corresponding with signal output parameter is sent at least two coupled apparatuses using signal generator；Synchronous alignment control signal is coupled with corresponding PV bus using coupled apparatus, so that synchronous alignment control signal is transmitted to switching off device by PV bus.As it can be seen that the technical solution, can keep synchronous alignment by the control signal that will be transmitted in different PV buses, the case where can so avoiding the occurrence of signal interference and cause switching off device that can not detect accurately control signal.Further, when there is electric arc, switching off device is quickly controlled, so that photovoltaic module stops output outward, high-voltage electricity can be eliminated, it can safeguards system safety.
Description
Technical field
Generate electricity by way of merging two or more grid systems technical field the present invention relates to distributed photovoltaic, more particularly to a kind of control signaling method,
Control equipment and photovoltaic control system.
Background technique
Due to the reproducibility and spatter property of solar energy, parallel network power generation technology is grown rapidly.Common photovoltaic
System is that multiple photovoltaic modulies connect to form group string, then accesses inverter and realizes that direct current is converted to exchange and grid-connected.
Concatenated photovoltaic module forms high direct voltage, and this high pressure will lead to Personal Risk and fire incident.Therefore, live
Photovoltaic system requires inverter to have arc protection protection, that is, to turn off the fortune of inverter at once when detecting electric arc
Row.But even if inverter is out of service, photovoltaic module strings together later direct current cables still and will continue to output high pressure
Electricity has security risk.
In order to eliminate high direct voltage, switching off device is added in usual way behind component, and the output series connection of switching off device connects inverse
Become device, there is controller to can control switching off device, realization rapidly switches off, and keeps voltage on direct current cables very low.Controller needs to send
Signal is controlled to switching off device.Currently, transmitting signal using magnet ring and direct current cables coupling, pass through multiple magnet rings and many motors control
Device connects more direct current cables, meets the needs of system.
Since direct current cables may be coupled by the ground line and capacitor of component and inverter, multiple passes in photovoltaic system
Disconnected device control signal interferes with each other, and will cause signal and weakens to influence the shutdown control of photovoltaic module, can not ensure photovoltaic
Component is when electric arc occurs in inverter, wholly off outside output direct current, however it remains security risk.
In conclusion the problems such as how effectively eliminating the high direct voltage in photovoltaic system, is current those skilled in the art
Member's technical problem urgently to be solved.
Summary of the invention
The object of the present invention is to provide a kind of control signaling method, control equipment and photovoltaic control systems, can be effective
Eliminate the problems such as high direct voltage in photovoltaic system in ground.
In order to solve the above technical problems, the invention provides the following technical scheme:
A kind of control signaling method, comprising:
The synchronous alignment request of signal for receiving and parsing through control switching off device, obtains signal output parameter；Wherein, the shutdown
PV circuit switch of the device between photovoltaic module and inverter；
Using signal generator at least two coupled apparatuses send it is corresponding with the signal output parameter synchronize be aligned
Control signal；
The synchronous alignment control signal is coupled with corresponding PV bus using the coupled apparatus, so as to described
The synchronous alignment control signal is transmitted to the switching off device by PV bus.
Preferably, the synchronous alignment request of signal for receiving and parsing through control switching off device, comprising:
Receive and parse through the synchronous alignment request of the signal of synchronously control component transmission；
Or utilize the synchronous alignment request of the signal that network communication components receive and parse through network equipment transmission.
Preferably, the synchronous alignment request of the signal for receiving and parsing through the transmission of synchronously control component, comprising:
The signal alignment pin being connected with the synchronously control component is detected, obtain and parses the signal is same
Step alignment request.
Preferably, the synchronous alignment request of signal for receiving and parsing through control switching off device, comprising:
The zero crossing of AC network is detected, zero crossing information is obtained；
The zero crossing information is determined as the synchronous alignment request of the signal, and to the synchronous alignment of the signal request into
Row parsing.
Preferably, the coupled apparatus is magnet ring, capacitor, any one device in transformer.
A kind of control equipment, comprising:
Center processor, signal generator and at least two coupled apparatuses；
Wherein, the center processor is connected with the signal generator, and controls the signal generator output and synchronize
Alignment control signal；
The output end of the signal generator is connected with the coupled apparatus；
The coupled apparatus is coupled with signal transmssion line, so as to the signal transmssion line by the control signal be transmitted to by
Control device.
Preferably, the signal generator be two, and the coupled apparatus be two, the signal generator with it is described
Coupled apparatus corresponds.
Preferably, the coupled apparatus is any one in magnet ring, capacitor and transformer.
A kind of photovoltaic control system, comprising:
Photoelectric subassembly, switching off device, inverter and such as above-mentioned control equipment；
The photoelectric subassembly, the switching off device and the inverter are connected by PV bus；
The control equipment is coupled by coupled apparatus with the PV bus, and synchronous alignment control signal is sent to institute
State switching off device.
Preferably, when the control number of devices is greater than 1, further includes:
Signal synchronizes alignment control equipment, for sending the synchronous alignment request of signal to each control equipment, so as to
Each control equipment sends synchronous alignment control signal to the corresponding coupled apparatus；Wherein, the signal synchronizes pair
Neat control equipment is that AC network or independent communication control network.
Using method provided by the embodiment of the present invention, the synchronous alignment request of signal of control switching off device is received and parsed through,
Obtain signal output parameter；Wherein, PV circuit switch of the switching off device between photovoltaic module and inverter；It is sent out using signal
Raw device sends synchronous alignment control signal corresponding with signal output parameter at least two coupled apparatuses；It will using coupled apparatus
Synchronous alignment control signal is coupled with corresponding PV bus, so that synchronous alignment control signal is transmitted to shutdown by PV bus
Device.
Discovery is researched and analysed, when the control signal phase difference transmitted in different PV buses is larger, is controlled between signal
Serious interference, the amplitude that will lead to control signal reduces, so that switching off device is difficult to detect corresponding control signal, it is difficult to disappear
Except the high-voltage electricity of photovoltaic module.And when the control signal phase transmitted in different PV buses is same or similar, control signal
Between amplitude will increase.Based on this, proposes and a kind of the control signal transmitted in different PV buses is enabled to keep same
The method for walking alignment, this method keep synchronous alignment by the control signal that will be transmitted in different PV buses, can so keep away
Exempt from the case where signal interference occur and causing switching off device that can not detect accurately control signal.Further, this method can be
When there is electric arc, switching off device is quickly controlled, so that photovoltaic module stops output outward, high-voltage electricity can be eliminated, it can safeguards system peace
Entirely.
Correspondingly, the embodiment of the invention also provides control equipment corresponding with above-mentioned control signaling method and light
Control system is lied prostrate, is had above-mentioned technique effect, details are not described herein.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of existing photovoltaic control system；
Fig. 2 a is the control signal schematic representation transmitted in a kind of lower PV bus of noiseless perfect condition；
Fig. 2 b is the control signal schematic representation transmitted respectively in the noiseless ideally two PV buses of one kind；
Fig. 2 c is a kind of schematic diagram for controlling signal under signal interference；
Fig. 3 a is the control signal schematic representation transmitted in another noiseless lower PV bus of perfect condition；
Fig. 3 b is the control signal schematic representation transmitted respectively in another noiseless ideally two PV buses；
Fig. 3 c is schematic diagram of another control signal under signal interference；
Fig. 4 is a kind of implementation flow chart for controlling signaling method in the embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram for controlling equipment in the embodiment of the present invention；
Fig. 6 is a kind of concrete structure schematic diagram for controlling equipment in the embodiment of the present invention；
Fig. 7 is the corresponding logical flow diagram of control program a kind of in the embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of photovoltaic control system in the embodiment of the present invention；
Fig. 9 is a kind of specific connection schematic diagram of part of devices in photovoltaic control system in the embodiment of the present invention；
Figure 10 is the corresponding logical flow diagram of another kind control program in the embodiment of the present invention；
Figure 11 is the specific connection schematic diagram of another kind of part of devices in photovoltaic control system in the embodiment of the present invention；
Figure 12 is a kind of signal alignment schematic diagram in the embodiment of the present invention；
Figure 13 is the schematic diagram of the corresponding logic flow of another kind control flow in the embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Obviously, described embodiments are only a part of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment one:
For ease of understanding, the technical issues of technical solution is solved is provided for the embodiments of the invention below to carry out in detail
Explanation.
Referring to FIG. 1, two magnet rings (diagram Core1 and Core2) and PV (Photovoltaic, the sun of controller T1
Photoelectricity) bus (diagram PV1+, PV2+) coupling, to realize the switch control of each switching off device to the narrow and shallow transmission control signal of light.
It can be seen from figure 1 that there are two positions to exist to the coupled capacitor of the earth in photovoltaic control system: first, capacitor C1 in cell array,
Coupling parasitic capacitance of the photoelectric subassembly of the position capacitor C2 to the earth；Second, inverter input side capacitor C3, capacitor C4 and capacitor
There is the filter capacitor and parasitic capacitance of the earth in C5.
Since there are above situations, if the phase difference of the control signal of two magnet rings is 90 ° (certainly also folded including other
Add the phase of loss, such as 20 °, 50 °, 75 °, 90 °), it is possible to the superposition existed such as Fig. 2 a, Fig. 2 b, Fig. 2 c is possible, causes letter
The loss of number amplitude；Wherein, diagram f21 signal is the control signal transmitted in lower PV bus of noiseless perfect condition, diagram
F22 signal is the control signal transmitted in noiseless ideally another PV bus, and diagram f23 is to generate signal interference to fold
F21 signal after adding loss, A21, A22 and A23 are respectively the amplitude to induction signal.From Figure 2 it can be seen that after f21 and f22 superposition,
The amplitude A23 of signal is less than A21, can make switching off device that can not receive accurately control signal in this way, to influence the letter of communication
Number quality.In addition, interfering with each other in inverter internal when can also exist between PV1 bus and PV2 bus, cause to control signal
The case where amplitude reduces.
To sum up, the prior art will cause signal and weaken to influence the shutdown control of photovoltaic module, can not ensure photovoltaic
Component is when electric arc occurs in inverter, wholly off outside output direct current, however it remains security risk.
It has been investigated that being controlled dry between signal when the control signal phase difference transmitted in different PV buses is larger
The amplitude reduction that seriously will lead to control signal is disturbed, so that switching off device is difficult to detect corresponding control signal, it is difficult to eliminate light
Lie prostrate the high-voltage electricity of component.And when the control signal phase transmitted in different PV buses is same or similar, it controls between signal
Amplitude will increase.Specifically, reference can be made to Fig. 3 a, Fig. 3 b and Fig. 3 c, wherein diagram f31 signal be it is noiseless ideally
The control signal transmitted in one PV bus is illustrated and is transmitted in the noiseless ideally another PV bus of f32 signal
Signal is controlled, diagram f33 is the f31 signal generated after signal interference superposition loss, and A31, A32 and A33 are respectively to induction signal
Amplitude, not only the amplitude of f33 can not declined, enhanced instead.In this way, can ensure that control signal is turned off device standard
It really detects, realizes to switching off device effectively control, can quickly eliminate high-voltage electricity when electric arc occurs in inverter, ensure system
System safety.
Based on this, the embodiment of the present invention proposes a kind of control signaling method, referring to FIG. 4, Fig. 4 is that the present invention is implemented
A kind of flow chart controlling signaling method in example, this method can be applied in control equipment, method includes the following steps:
The synchronous alignment request of S101, the signal for receiving and parsing through control switching off device, obtains signal output parameter.
Wherein, PV circuit switch of the switching off device between photovoltaic module and inverter.
When the synchronous alignment request of the signal that control equipment receives control switching off device, alignment request can be synchronized to the signal
It is parsed, obtains signal output parameter.
Wherein, signal output parameter may include phase parameter, magnitude parameters and output time.For example, can be for phase
It 50 °, disconnects and closure respectively corresponds different amplitudes (being such as broken as a, be closed as b, and a ≠ b), the output time can be obtained for parsing
Output immediately controls signal after obtaining signal output parameter.
It, in practical applications can root in embodiments of the present invention there are many mode for receiving the synchronous alignment request of analytic signal
According to demand optionally first,
Mode one: the synchronous alignment of control signal is realized using synchronously control component, specifically, can receive and parse synchronous control
The synchronous alignment request of the signal that component processed is sent.The synchronously control component can be specially to connect multiple control the same of equipment to patrol
Volume or communication control, as logic level control or communication control.Specifically, being detected to signal alignment pin, obtain simultaneously
The synchronous alignment request of analytic signal.Specifically, when the level for detecting signal alignment pin is high level (or being low level),
Then it is considered as and receives the synchronous alignment request of signal, signal output parameter is then read from readable storage medium storing program for executing.
Mode two: the synchronous alignment of control signal is realized using the network equipment, specifically, receiving using network communication components
And the synchronous alignment request of signal for parsing network equipment transmission.Wherein, network communication components can be such as WiFi component, bluetooth group
The wireless communication components such as part can also be the wire communications components such as 485 serial ports, Ethernet interface.
Mode three: the synchronous alignment of control signal, the synchronous alignment request side of corresponding signal are realized based on AC network
Formula, comprising the following steps:
Step 1: the zero crossing of detection AC network, obtains zero crossing information；
Step 2: zero crossing information is determined as the synchronous alignment request of signal, and the synchronous alignment request of signal is solved
Analysis.
Due in embodiments of the present invention, main purpose be in order to realize that control signal alignment is synchronous, can also will be to friendship
Galvanic electricity net is detected, and using its zero crossing information as signal, it is same to be then considered as acquisition when there is zero crossing for synchronous alignment request
Step alignment request.
It should be noted that in embodiments of the present invention, it, can also be straight after the synchronous alignment request of above-mentioned signal can be selected
Setting timing cycle is connect, is considered as with to reach timing cycle and receives the synchronous alignment request of signal.
S102, using signal generator at least two coupled apparatuses send it is corresponding with signal output parameter synchronize be aligned
Control signal.
In embodiments of the present invention, after obtaining output signal parameter, signal generator can be utilized at least two couplings
Clutch part sends synchronous alignment control signal corresponding with the signal output parameter.
Specifically, then the control equipment can one into it when only having a control equipment in photovoltaic control system
Signal generator or two signal generators issue signal output order, include signal output parameter in the signal output order,
Such coupled apparatus acquisition synchronous alignment control corresponding with signal output parameter that can make and signal generator is connected
Signal.
Wherein, synchronous alignment control signal refers to the phase of the control signal transmitted on two or more coupled apparatuses
Position is identical.In practical applications, using the signal period is identical, phase is identical and signal that amplitude is different transmitting control signal.
S103, synchronous alignment control signal is coupled with corresponding PV bus using coupled apparatus, so as to PV bus
Synchronous alignment control signal is transmitted to switching off device.
Wherein, coupled apparatus can be any one device in magnet ring (or induction coil), capacitor, transformer.
When coupled apparatus is magnet ring, PV bus can be passed through to magnet ring, magnet ring under the action of synchronous alignment control signal,
Magnetic force changes, and the magnetic force change acts on PV bus, and PV bus generates and transmits alignment control signal pair synchronous with this
The control signal answered to switching off device switchs.
It, can be by capacitor and PV bus parallel connection, effect of the capacitor in synchronous alignment control signal when coupled apparatus is capacitor
Under, charging and discharging is constantly carried out, voltage constantly changes, so that PV bus generates and transmits alignment control synchronous with this
The corresponding control signal of signal to switching off device switchs.
, can be by the transformer and PV bus parallel connection when coupled apparatus is voltage device, voltage device is in synchronous alignment control letter
Under the action of number, constantly change voltage, so that PV bus generates and to export alignment control signal synchronous with this corresponding
Signal to switching off device is controlled to switch.
After switching off device switch receives synchronous aligned signal, the amplitude of the synchronization aligned signal can be detected, then
According to the corresponding control specification of pre-set amplitude, the switch state of current time switching off device is determined.For example, control specification
Are as follows: amplitude is then to disconnect more than or equal to A；Amplitude is then to connect less than or equal to B；Wherein A is greater than B；When detecting alignment control
When signal is C, the numerical values recited relationship of C Yu A, B are determined, if C is more than or equal to A, disconnected, i.e. the light of switching off device connection at this time
It lies prostrate to be formed between component and inverter and open a way；If C be less than or equal to B, connect, i.e., at this time the switching off device connection photovoltaic module with
It is access between inverter.
Using method provided by the embodiment of the present invention, the synchronous alignment request of signal of control switching off device is received and parsed through,
Obtain signal output parameter；Wherein, PV circuit switch of the switching off device between photovoltaic module and inverter；It is sent out using signal
Raw device sends synchronous alignment control signal corresponding with signal output parameter at least two coupled apparatuses；It will using coupled apparatus
Synchronous alignment control signal is coupled with corresponding PV bus, so that synchronous alignment control signal is transmitted to shutdown by PV bus
Device.
As it can be seen that proposing a kind of side for enabling to the control signal transmitted in different PV buses to keep synchronous alignment
Method, this method keep synchronous alignment by the control signal that will be transmitted in different PV buses, can so avoid the occurrence of signal
The case where interfering and causing switching off device that can not detect accurately control signal.Further, this method can when there is electric arc,
Quickly control switching off device can eliminate high-voltage electricity so that photovoltaic module stops output outward, can safeguards system safety.
Embodiment two:
Corresponding to above method embodiment, the embodiment of the invention also provides a kind of control equipment, described below one
Kind of control equipment can correspond to each other reference with a kind of above-described control signaling method.
Shown in Figure 5, which includes:
Center processor 100, signal generator 200 and at least two coupled apparatuses 300；
Wherein, center processor is connected with signal generator, and control signal generator exports synchronous alignment control signal；
The output end of signal generator is connected with coupled apparatus；
Coupled apparatus is coupled with signal transmssion line, so that signal transmssion line is transmitted to controlled device for signal is controlled.
Wherein, center processor can be specially MCU (Micro Control Unit, micro-control unit).
It should be noted that a control equipment can have one or more signal generator, when there is only one
When a signal generator, then the signal generator connects at least two coupled apparatuses；Signal generator is two, and coupled apparatus
It is two, signal generator and coupled apparatus correspond.
Wherein, coupled apparatus is any one in magnet ring, capacitor and transformer.It, can if coupled apparatus is magnet ring
Signal transmssion line is passed through into magnet ring, realizes signal transmitting；It, correspondingly, can be with signal transmssion line simultaneously when for capacitor and voltage device
Connection realizes signal transmitting.
Specifically, believing when with photovoltaic module corresponding switching off device in control equipment control photovoltaic control system
Number transmission line is PV bus, and controlled device is switching off device.
Referring to FIG. 6, the step in control signaling method as described above can be real by the structure of control equipment
It is existing, specifically, control program corresponding with above-mentioned control signaling method can be performed in center processor in control equipment, and
It cooperates with its signal generator, magnet ring, can realize the step in control signaling method.Wherein, program pair is controlled
The logic flow answered can be found in Fig. 7, wherein timing t sees the duration of specially Millisecond, and alignment output order is center processing
Device sends signal output parameter to two signal generators.As it can be seen that the control equipment has possessed by above method embodiment
Technical effect.
Embodiment three:
Corresponding to apparatus embodiments above, the embodiment of the invention also provides a kind of photovoltaic control systems, are described below
A kind of photovoltaic control system can correspond to each other reference with a kind of above-described control equipment.
Referring to FIG. 8, the system includes:
Photoelectric subassembly 801, switching off device 802, inverter 803 and such as above-mentioned control equipment 804；
Photoelectric subassembly, switching off device and inverter are connected by PV bus；
Control equipment is coupled by coupled apparatus with PV bus, and synchronous alignment control signal is sent to switching off device.Its
In, the quantity of switching off device matches one by one with broadcasting and TV component count, and diagram n can be determined and adjust according to actual deployment demand,
In the present embodiment without limitation to broadcasting and TV component count n.In addition, only depict the wherein PV1 bus of inverter in fig. 8
On device illustrate device, in addition a PV2 bus can refer to and PV1 bus.
Preferably, when controlling number of devices greater than 1, further includes:
Signal synchronizes alignment control equipment, for sending the synchronous alignment request of signal to each control equipment, so as to each
It controls equipment and sends synchronous alignment control signal to corresponding coupled apparatus；Wherein, the synchronous alignment control equipment of signal is exchange
Power grid or independent communication control network.
Due to there is control equipment in the system, which can realize that control signal accurately and reliably transmits, can
Efficiently control switching off device, i.e. this system the technical effect that similarly there is above method embodiment to have.
To more fully understand that the technology that system provided by the embodiment of the present invention has is imitated convenient for those skilled in the art
Fruit, below be described in detail for specific application scenarios.
Referring to FIG. 9, it is, there are when multiple control equipment, corresponding control signal alignment is same in photovoltaic control system
Walk a kind of part of devices connection schematic diagram realized.At this point, control flow as shown in Figure 10 can be performed in control equipment.
Please refer to Figure 11, Figure 11 is in photovoltaic control system there are when multiple control equipment, corresponding control signal pair
The neat synchronous another part of devices connection schematic diagram realized.It will say that a controller is powered using the same AC, power in AC
Upper transmitting synchronously control is instructed to each controller.
Signal is realized when there are when multiple control equipment, can also pass through the zero crossing in AC network in photovoltaic control system
Alignment.Many motors control device is connected to the same AC network.Specifically, its signal alignment schematic diagram is as shown in figure 12,
Wherein f41 is synchronous alignment control signal, and f42 is to exchange electrical schematic in AC network.It can be executed in control equipment at this time
Control flow as shown in fig. 13 that.I.e. using the zero crossing of alternating current as reference signal, at this moment controller sends control letter simultaneously
Number, just it is aligned.
It should be noted that the initialization hardware described in control flow is center processor start-up operation, and
Time sets 0.
Example IV:
Corresponding to above method embodiment, the embodiment of the invention also provides a kind of readable storage medium storing program for executing, are described below
A kind of readable storage medium storing program for executing can correspond to each other reference with a kind of above-described control signaling method.
A kind of readable storage medium storing program for executing is stored with computer program on readable storage medium storing program for executing, and computer program is held by processor
The step of control signaling method of above method embodiment is realized when row.
The readable storage medium storing program for executing be specifically as follows USB flash disk, mobile hard disk, read-only memory (Read-Only Memory,
ROM), the various program storage generations such as random access memory (Random Access Memory, RAM), magnetic or disk
The readable storage medium storing program for executing of code.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
Claims (10)
1. a kind of control signaling method characterized by comprising
The synchronous alignment request of signal for receiving and parsing through control switching off device, obtains signal output parameter；Wherein, the switching off device is
PV circuit switch between photovoltaic module and inverter；
Synchronous alignment control corresponding with the signal output parameter is sent at least two coupled apparatuses using signal generator
Signal；
The synchronous alignment control signal is coupled with corresponding PV bus using the coupled apparatus, so that the PV is total
The synchronous alignment control signal is transmitted to the switching off device by line.
2. control signaling method according to claim 1, which is characterized in that described to receive and parse through control switching off device
The synchronous alignment request of signal, comprising:
Receive and parse through the synchronous alignment request of the signal of synchronously control component transmission；
Or utilize the synchronous alignment request of the signal that network communication components receive and parse through network equipment transmission.
3. control signaling method according to claim 2, which is characterized in that described to receive and parse through synchronously control group
The synchronous alignment request of the signal that part is sent, comprising:
The signal alignment pin being connected with the synchronously control component is detected, obtains and parses the signal and synchronize pair
Neat request.
4. control signaling method according to claim 1, which is characterized in that described to receive and parse through control switching off device
The synchronous alignment request of signal, comprising:
The zero crossing of AC network is detected, zero crossing information is obtained；
The zero crossing information is determined as the synchronous alignment request of the signal, and the synchronous alignment request of the signal is solved
Analysis.
5. control signaling method according to any one of claims 1 to 4, which is characterized in that the coupled apparatus is
Magnet ring, capacitor, any one device in transformer.
6. a kind of control equipment characterized by comprising
Center processor, signal generator and at least two coupled apparatuses；
Wherein, the center processor is connected with the signal generator, and controls the synchronous alignment of the signal generator output
Control signal；
The output end of the signal generator is connected with the coupled apparatus；
The coupled apparatus is coupled with signal transmssion line, so that the control signal is transmitted to controlled device by the signal transmssion line
Part.
7. control equipment according to claim 6, which is characterized in that the signal generator is two, and the coupling
Device is two, and the signal generator and the coupled apparatus correspond.
8. control equipment according to claim 6, which is characterized in that the coupled apparatus is magnet ring, capacitor and transformer
In any one.
9. a kind of photovoltaic control system characterized by comprising
Photoelectric subassembly, switching off device, inverter and such as described in any item control equipment of claim 6 to 8；
The photoelectric subassembly, the switching off device and the inverter are connected by PV bus；
The control equipment is coupled by coupled apparatus with the PV bus, and synchronous alignment control signal is sent to the pass
Disconnected device.
10. photovoltaic control system according to claim 9, which is characterized in that when the control number of devices is greater than 1,
Further include:
Signal synchronizes alignment control equipment, for sending the synchronous alignment request of signal to each control equipment, so as to each
The control equipment sends synchronous alignment control signal to the corresponding coupled apparatus；Wherein, the synchronous alignment control of the signal
Control equipment is that AC network or independent communication control network.
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