CN208638366U - A kind of parallel connection communication system - Google Patents
A kind of parallel connection communication system Download PDFInfo
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- CN208638366U CN208638366U CN201820930289.0U CN201820930289U CN208638366U CN 208638366 U CN208638366 U CN 208638366U CN 201820930289 U CN201820930289 U CN 201820930289U CN 208638366 U CN208638366 U CN 208638366U
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Abstract
The utility model embodiment discloses a kind of communication system in parallel, comprising: bidirectional connecting lines group, the bidirectional connecting lines group are used to meet the transmitted in both directions of signal；Multiple equipment, the multiple equipment are connected circlewise by the bidirectional connecting lines group, wherein any appliance sends identical communication signal to two connected equipment by the bidirectional connecting lines group, and receives the communication signal that two associated devices are sent.It solves the lower technical problem of the stability of the communication system in parallel of the prior art, has reached the technical effect for improving the stability of communication system in parallel.
Description
Technical field
The utility model embodiment is related to communication technique field more particularly to a kind of communication system in parallel.
Background technique
Due to increasingly fierce and photovoltaic electricity price subsidy the decline increasingly of new energy industry competition, each unit of operation
Finding the method for reducing communication system operating cost.In order to reduce the operating cost of communication system, unit of operation is generallyd use
Communication system in parallel, such as an isolating transformer generally connect more inverters.But in the communication system in parallel of existing power grid
In, if certain of some inverter communicates failure all the way, the problems such as parallel connection circulation and common-mode voltage will occur, lead to parallel connection
Equipment can not generate electricity by way of merging two or more grid systems.That is, the fault-tolerant ability and stability of existing parallel connection communication system are lower.
Utility model content
The utility model embodiment provides a kind of communication system in parallel, for solving the communication system in parallel of the prior art
The lower technical problem of stability.
In a first aspect, the utility model embodiment provides a kind of communication system in parallel, comprising:
Bidirectional connecting lines group, the bidirectional connecting lines group are used to meet the transmitted in both directions of signal；
Multiple equipment, the multiple equipment are connected circlewise by the bidirectional connecting lines group, wherein any appliance passes through
The bidirectional connecting lines group sends identical communication signal to two connected equipment, and receives the communication letter that two associated devices are sent
Number.
Further, the equipment includes two groups of connecting terminals, and the bidirectional connecting lines group includes two bars transmission lines；
Connecting terminal described in every group includes sending port and receiving port, and the sending port and the receiving port are distinguished
It is connect with two bars transmission lines of the bidirectional connecting lines group, and is respectively used to send communication signal and receives communication signal.
Further, the equipment is inverter.
Further, the output end of all equipment is connected in parallel isolating transformer.
Further, the equipment according to the logical operation knot of the level of communication signal that sends of received two associated devices
Fruit executes corresponding movement.
Further, the communication system in parallel includes at least 3 equipment.
Further, the multiple equipment includes a host equipment and multiple slave devices；
After the host equipment failure, the slave devices, which are based on preset order, becomes new host equipment.
Further, it is connected between the multiple equipment by wire communication mode or wireless communication mode.
The technical solution of parallel connection communication system provided by the embodiment of the utility model, including multiple equipment and for connecting
The bidirectional connecting lines group of multiple equipment, bidirectional connecting lines group are used to meet the transmitted in both directions of signal, and multiple equipment passes through two-way company
Wiring group connects circlewise；Any appliance sends identical communication signal to two connected equipment by bidirectional connecting lines group, and
The communication signal of two associated devices transmission is received, the redundancy communication system with the annular communication path of contrary two is formed
System；So that when event occurs to certain of a certain equipment failure of communication system in parallel or a certain equipment in communication line all the way
Barrier, which can work normally, when so as to prevent power grid grid-connected, because of the communication failure of some inverter
And there is the problems such as parallel connection circulation and common-mode voltage, improve the stability of communication system in parallel.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used does one and simply introduces, it should be apparent that, the accompanying drawings in the following description is some implementations of the utility model
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the block diagram representation of communication system in parallel provided by the embodiment of the utility model；
Fig. 2 is the block diagram representation of the communication system in parallel of communication fault provided by the embodiment of the utility model；
Fig. 3 is the block diagram signal of the communication system in parallel of another communication fault provided by the embodiment of the utility model
Figure；
Fig. 4 is the flow chart of the means of communication in parallel provided by the embodiment of the utility model.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, implement hereinafter with reference to the utility model
Attached drawing in example, clearly and completely describes the technical solution of the utility model by embodiment, it is clear that described implementation
Example is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, this field
Those of ordinary skill's every other embodiment obtained without making creative work, belongs to the utility model
The range of protection.
Embodiment
Fig. 1 is the block diagram representation of communication system in parallel provided by the embodiment of the utility model.The technical side of the present embodiment
The case where case is suitable for the case where communication in parallel, is particularly suitable for the communication in parallel of grid inverters, the present embodiment is with power grid
Inverter parallel communication is illustrated communication system in parallel.As shown in Figure 1, the parallel connection communication system includes bidirectional connecting lines group
And multiple equipment, bidirectional connecting lines group are used to meet the transmitted in both directions of signal；Multiple equipment is connected by bidirectional connecting lines group
It is cyclic annular, wherein any appliance sends identical communication signal to two connected equipment by bidirectional connecting lines group, and receives two-phase
The communication signal that attached device is sent.
In power supply system, in order to increase loaded electricity and improve the safety of operation of power networks, usually multichannel is supplied
The output end of the inverter of electric line and the input terminal of isolating transformer are connected in parallel, and are then connected again by isolating transformer negative
It carries, to improve the safety of operation of power networks.But the communication system in parallel that existing inverter is constituted, when wherein a certain equipment goes out
Certain of existing failure or a certain equipment is when communication line breaks down all the way, some or certain several inverters in system are by direct current
Becoming the communication signal that is based on of exchange can be abnormal, and then the problems such as parallel connection circulation and common-mode voltage occurs, be unfavorable for every
Normal operation from transformer and power grid.Therefore, the present embodiment is on the basis of the communication system in parallel of existing inverter, and increases
A communication loop is added, has made the annular of inverter communication system in parallel that there is the annular communication path of contrary two.Such as
Shown in Fig. 1, each inverter is provided with two groups of connecting terminals, and every group of connecting terminal includes sending port and receiving port.It sends
Port and receiving port are connect with two bars transmission lines of bidirectional connecting lines group respectively, and be respectively used to send communication signal and
Receive communication signal.
Wherein, bidirectional connecting lines group can be wired carrier of entity, such as cable, twisted pair or optical fiber, be also possible to
Wireless carrier, such as electromagnetic wave.
Wherein, any inverter receives two coupled inverters are sent respectively first by its two receiving port
Communication signal.It should be noted that the received communication signal of inverter institute is referred to as the first communication signal by the present embodiment, it will be inverse
Become communication signal transmitted by device as the second communication signal, from the point of view of entire communication system in parallel, transmitted by a certain inverter
The second communication signal, as its received first communication signal of inverter institute that is connected, the present embodiment is named in this way only for area
Point same inverter received communication signal and transmitted communication signal.Wherein, two first communication signals can be identical
It can be different.Moreover, the first communication signal and the second communication signal are the communication signal of the prior art, for example, level signal or
Carrier signal.By taking level signal as an example, after inverter receives the first communication signal that two coupled inverters are sent, root
According to logic of propositions operation, logical operation is carried out to two first communication signals, it is inverse to coupled two according to logic operation result
Become device and sends identical communication signal.
Wherein, logic of propositions operation can be set according to actual use scene.Such as two first communication signal it is upper
Rising the logic and operation on edge, perhaps logic or operation perhaps the logic and operation of the failing edge of two first communication signals or are patrolled
Volume or operation.
Under normal conditions, an inverter, the output end and isolating transformer of multiple inverters is arranged in every power supply line
Input terminal be connected in parallel, therefore the quantity of inverter is usually specified defeated with the quantity of power supply line and isolating transformer
It is related to enter electric current, nominal input voltage or rated input power.In other words, the number of devices in the present embodiment can be according to using field
Scape is configured.
In order to improve the stability of communication system in parallel, main inverter usually is set by one in multiple inverters,
Other inverters are set as from inverter.When main inverter break down after, therein one from inverter according to preset order at
For main inverter；Or in system it is multiple from inverter according to the default rules of competition compete main inverter.The present embodiment according to
The prior art carries out the setting of main inverter, and it will not be described here.Under normal conditions, main inverter is according to institute received the
One communication signal generates the logical operation of the second communication signal, generates the with from inverter according to received first communication signal of institute
The logical operation of two communication signals is different.In addition, when a certain inverter is only capable of receiving the first communication letter by a receiving port
Number when, then default received first communication signal of another port institute and be often low level or be often high level, in actual use, can root
It is set according to concrete condition.
Illustratively, when 2 port of transmission of #2 equipment is broken down or its 1 end of reception for sending 2 ports and #3 equipment
When communication line between mouthful breaks down, referring specifically to the communication line where the "×" in Fig. 2, #3 equipment can still lead to
2 communication connection of receiving port of its sending port 2 Yu #n equipment is crossed, #2 equipment still can connect #1 by its sending port 1
Then the receiving port 2 of equipment is connect by the sending port 1 of #1 equipment with the receiving port 2 of #n equipment, constitute one completely
Communication loop.At this point, #n equipment is main equipment when #2 equipment or #3 equipment are from equipment, it is any can be direct from equipment
Or communicated indirectly with main equipment, i.e., the parallel connection communication system can work normally；When #2 equipment is main equipment, and should
When communication system in parallel detects that communication line of the #2 equipment for sending communication signal to #3 equipment breaks down, it is preferably based on
Preset order using one of them from equipment as main equipment, for example using #n equipment as main equipment, each road of main equipment is logical at this time
Interrogate route it is normal, and it is any from equipment can with main equipment carry out communication connection.
Illustratively, when #2 equipment is main equipment, and the communication line of itself and associated devices all breaks down, specifically
Referring to the communication line where the "×" in Fig. 3, #1 equipment, #3 equipment and #n equipment can still be carried out by redundant path
Communication connection, be preferably based at this time preset order will wherein one from equipment as main equipment, such as using #n equipment as main equipment.
Equally be Fig. 3, when #2 be from equipment,, can also be by #n equipment in order to improve the stability of the system operation when #3 is main equipment
As main equipment.In conclusion the equipment exits when the communication line of the coupled equipment of a certain equipment all breaks down
The parallel connection communication system, but remaining equipment can carry out communication connection by redundant path, i.e., and the parallel connection communication system can be steady
Surely it runs.
The technical solution of parallel connection communication system provided by the embodiment of the utility model, including multiple equipment and for connecting
The bidirectional connecting lines group of multiple equipment, bidirectional connecting lines group are used to meet the transmitted in both directions of signal, and multiple equipment passes through two-way company
Wiring group connects circlewise；Any appliance sends identical communication signal to two connected equipment by bidirectional connecting lines group, and
The communication signal of two associated devices transmission is received, the redundancy communication system with the annular communication path of contrary two is formed
System；So that when event occurs to certain of a certain equipment failure of communication system in parallel or a certain equipment in communication line all the way
Barrier, which can work normally, when so as to prevent power grid grid-connected, because of the communication failure of some inverter
And there is the problems such as parallel connection circulation and common-mode voltage, improve the stability of communication system in parallel.
As the another embodiment of the utility model, Fig. 4 is the means of communication in parallel provided by the embodiment of the utility model
Flow chart, the technical solution of the means of communication in parallel described in the present embodiment are applicable in logical between communication system internal unit in parallel
News, the communication being particularly suitable between grid inverters.This method can be by communication in parallel provided by the embodiment of the utility model
System executes, and this method can realize by the way of software and/or hardware.This method specifically comprises the following steps:
S101, the first communication signal that two associated devices are sent is received.
Each inverter is set there are two receiving port, and receives the two inverters transmission that is connected respectively by two receiving ports
First communication signal；When the inverter does not receive in wherein the first communication signal of a connected inverter or preset time
When first communication signal transmitted by inverter that is connected occurs abnormal, then it will be unable to received first communication signal or exception
The first communication signal as preset failure signal, for example default first communication signal and be not present, or place it in always low
Level, or place it in high level always etc..
S102, according to received two first communication signal logic operation result, to two associated devices send it is identical
Second communication signal.
After inverter receives the first communication signal that two connected inverters are sent, according to logic of propositions operation, to two
First communication signal carries out logical operation, then generates the second communication signal according to the result of logical operation, and send by two
Port sends the second communication signal to two connected inverters respectively simultaneously, and direct current is become alternating current and is delivered to isolation transformation
Device, to guarantee that the alternating current phases that each inverter is exported meet default timing requirements.
Wherein, logic of propositions operation can be the logic and operation of two first communication signal rising edges, two first communication letters
The logic or operation of number rising edge, the logic and operation of two first communication signal failing edges or the decline of two first communication signals
The logic or operation on edge.
When a certain receiving port of inverter does not receive the first communication signal or the first communication signal detects abnormal,
As preset failure signal, then inverter carries out logic of propositions according to preset failure signal and another first communication signal
Operation, to generate the second communication signal.
The technical solution of the parallel connection means of communication provided by the embodiment of the utility model, receives two associated devices are sent first
Communication signal, according to received two first communication signal logic operation result, to two associated devices send identical second
Communication signal, to form two contrary communication lines in the cyclic annular cable architecture that multiple equipment is constituted, to make parallel connection
A certain equipment in communication system breaks down or certain of a certain equipment is when communication line breaks down all the way, which communicates
System remains to work normally, and when so as to prevent power grid grid-connected, parallel ring occurs because of the communication failure of some inverter
The problems such as stream and common-mode voltage, improve the stability of communication system in parallel.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright
Aobvious variation, readjustment and substitution is without departing from the protection scope of the utility model.Therefore, although passing through above embodiments
The utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from
It can also include more other equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Scope of the claims determine.
Claims (8)
1. a kind of parallel connection communication system characterized by comprising
Bidirectional connecting lines group, the bidirectional connecting lines group are used to meet the transmitted in both directions of signal；
Multiple equipment, the multiple equipment are connected circlewise by the bidirectional connecting lines group, wherein any appliance passes through described
Bidirectional connecting lines group sends identical communication signal to two connected equipment, and receives the communication signal that two associated devices are sent.
2. parallel connection communication system according to claim 1, which is characterized in that the equipment includes two groups of connecting terminals, institute
Stating bidirectional connecting lines group includes two bars transmission lines；
Connecting terminal described in every group includes sending port and receiving port, the sending port and the receiving port respectively with institute
The two bars transmission lines connection of bidirectional connecting lines group is stated, and is respectively used to send communication signal and receives communication signal.
3. parallel connection communication system according to claim 1, which is characterized in that the equipment is inverter.
4. parallel connection communication system according to claim 3, which is characterized in that the output end of all equipment is connected in parallel
Isolating transformer.
5. parallel connection communication system according to claim 1, which is characterized in that the equipment is connected according to institute received two
The logic operation result of the level for the communication signal that preparation is sent executes corresponding movement.
6. parallel connection communication system according to claim 1, which is characterized in that the parallel connection communication system includes at least 3
Equipment.
7. parallel connection communication system according to claim 6, which is characterized in that the multiple equipment includes a host equipment
With multiple slave devices；
After the host equipment failure, the slave devices, which are based on preset order, becomes new host equipment.
8. -7 any communication system in parallel according to claim 1, which is characterized in that by having between the multiple equipment
Line communication modes or wireless communication mode are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820930289.0U CN208638366U (en) | 2018-06-14 | 2018-06-14 | A kind of parallel connection communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820930289.0U CN208638366U (en) | 2018-06-14 | 2018-06-14 | A kind of parallel connection communication system |
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| Publication Number | Publication Date |
|---|---|
| CN208638366U true CN208638366U (en) | 2019-03-22 |
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| CN201820930289.0U Active CN208638366U (en) | 2018-06-14 | 2018-06-14 | A kind of parallel connection communication system |
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| CN (1) | CN208638366U (en) |
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