CN111614401A - Power unit communication expansion device - Google Patents
Power unit communication expansion device Download PDFInfo
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- CN111614401A CN111614401A CN202010430000.0A CN202010430000A CN111614401A CN 111614401 A CN111614401 A CN 111614401A CN 202010430000 A CN202010430000 A CN 202010430000A CN 111614401 A CN111614401 A CN 111614401A
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Abstract
The invention discloses a power unit communication expansion device, which comprises: the device comprises a pulse unit, an expansion unit and n power units, wherein n is a positive integer greater than or equal to 2; wherein: the pulse unit is connected with the expansion unit, and the expansion unit is connected with the n power units. The invention can meet the requirement of realizing the communication with a plurality of AC unit power units based on the limited optical communication interface of the controller.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a power unit communication extension apparatus.
Background
Along with the requirements of service life prediction and early warning and diagnosis of faults of the power unit, the requirement of data transmission bandwidth of the power unit is continuously improved, and the traditional state and signal transmission mode based on electric signals cannot meet the application requirements in cost, volume, data bandwidth and anti-interference capacity.
The optical interface technology is used as an excellent signal transmission and communication means, has strong anti-interference capability naturally, has high signal transmission bandwidth, and is suitable for data transmission of high-speed signals in a complex electromagnetic environment. However, due to the characteristics of the components of the optical interface, the interface density is difficult to improve, and the cost is high, for example, a single-to-single interface connection mode brings great trouble to the volume density of the controller interface.
Therefore, how to implement communication between a plurality of ac unit power units based on a limited optical communication interface of a controller is a problem to be solved.
Disclosure of Invention
In view of the above, the present invention provides a power unit communication extension apparatus, which can meet the requirement of implementing communication with multiple ac unit power units based on a limited optical communication interface of a controller.
The invention provides a power unit communication expansion device, which comprises: the device comprises a pulse unit, an expansion unit and n power units, wherein n is a positive integer greater than or equal to 2; wherein:
the pulse unit is connected with the expansion unit;
the expansion unit is connected with the n power units.
Preferably, the pulse unit includes: the device comprises a pulse generating unit, a communication state control unit, a communication configuration unit, a timing synchronization unit and a data transmitter; wherein:
the communication configuration unit is connected with the timing synchronization unit and is used for setting a communication period;
the pulse generating unit is connected with the communication state control unit and is used for generating unit pulses;
the timing synchronization unit is connected with the communication state control unit and used for starting communication based on the communication period set by the communication configuration unit;
the communication state control unit is connected with the data transmitter and used for receiving the unit pulse generated by the pulse generation unit and transmitting the formed data frame to the expansion unit through the data transmitter when the timing synchronization unit starts communication.
Preferably, the extension unit includes: a data receiver, a downlink channel buffer unit, a broadcasting unit including n broadcasting ports and n data transmitters; wherein:
the data receiver is connected with the data transmitter in the pulse unit and used for receiving the data frame sent by the pulse unit;
one end of the downlink channel buffer unit is connected with the data receiver, and the other end of the downlink channel buffer unit is connected with the broadcasting unit and used for buffering the data frame and sending the buffered data frame to the broadcasting unit;
the n broadcasting ports of the broadcasting unit are respectively connected with the n data transmitters and are used for multicasting the data frames to the n power units through the n data transmitters.
Preferably, each of the power units includes a data receiver for receiving the burst data from the burst unit, the broadcast number information from the broadcast unit of the spreading unit, and the synchronization tail from the burst unit.
Preferably, the communication configuration unit is further configured to set access timeslot allocation information.
Preferably, the pulse unit further includes: time division multiplexing time slot distribution unit, data interface, data buffer unit and a data receiver; wherein:
the time division multiplexing time slot allocation unit is connected with the communication configuration unit and is used for adding data receiver number information of an extension unit which is allowed to be accessed in a data frame by the communication state control unit according to cycle according to access time slot allocation information set by the communication configuration unit;
the data receiver is used for receiving data sent by the power unit through the extension unit;
the data buffer unit is respectively connected with the data receiver and the data interface and is used for buffering the data received by the data receiver and then sending the buffered data to the data interface.
Preferably, the extension unit further includes: the system comprises an uplink time division multiplexing time slot acquisition unit, n data receivers, n buffer units respectively connected with the n data receivers, an uplink channel switching unit and a data transmitter; wherein;
the uplink time division multiplexing time slot acquisition unit is respectively connected with the broadcasting unit and the uplink channel switching unit and is used for changing an access channel of the uplink channel switching unit according to the acquired time slot allocation information;
the n data receivers are respectively connected with the n power units and used for receiving data sent by the power units;
the n buffer units are respectively connected with the n data receivers and the uplink channel switching unit, and are used for respectively buffering the received data sent by the power unit and then sending the buffered data to the uplink channel switching unit;
and the uplink channel switching unit is connected with the data transmitter and is used for transmitting the data transmitted by the power unit to the data receiver of the pulse unit through the data transmitter according to the access channel of the uplink channel switching unit.
Preferably, each of the power units includes a data transmitter for transmitting data of the power unit to the n data receivers of the extension unit.
Preferably, the pulse unit is connected to the extension unit by a single pair of high speed optical fibers.
Preferably, the expansion unit is connected with n power units through n pairs of high-speed optical fibers.
To sum up, the present invention discloses a power unit communication extension apparatus, comprising: the device comprises a pulse unit, an expansion unit and n power units, wherein n is a positive integer greater than or equal to 2; wherein: the pulse unit is connected with the expansion unit, and the expansion unit is connected with the n power units. The invention meets the communication requirement of realizing the communication with a plurality of AC unit power units based on the limited optical communication interface of the controller by arranging the extension unit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment 1 of a power unit communication extension apparatus disclosed in the present invention;
fig. 2 is a schematic structural diagram of an embodiment 2 of a power unit communication extension apparatus disclosed in the present invention;
FIG. 3 is a schematic diagram of a structure of a pulse unit issuing data frames according to the present invention;
fig. 4 is a schematic structural diagram of a data frame issued by an extension unit according to the present invention;
fig. 5 is a schematic structural diagram of a data frame uploaded by a power unit according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, which is a schematic structural diagram of an embodiment 1 of a power unit communication expansion apparatus disclosed in the present invention, the apparatus includes: the device comprises a pulse unit, an expansion unit and n power units, wherein n is a positive integer greater than or equal to 2; wherein:
the pulse unit is connected with the expansion unit;
the expansion unit is connected with the n power units.
The power unit communication extension device disclosed in the above embodiment connects the pulse unit in the controller to the n power units through the extension unit, and realizes the physical channel expansion in the optical-electrical-optical form between the single pair of communication optical fibers and the plurality of power units based on the single pair of communication optical fibers on the controller side through the extension unit.
As shown in fig. 2, which is a schematic structural diagram of an embodiment 2 of a power unit communication extension apparatus disclosed in the present invention, the apparatus includes: the device comprises a pulse unit, an expansion unit and n power units, wherein n is a positive integer greater than or equal to 2; wherein:
the pulse unit includes: the device comprises a pulse generating unit, a communication state control unit, a communication configuration unit, a timing synchronization unit, a data transmitter M-TX, a time division multiplexing time slot allocation unit (TDM time slot allocation unit), a data interface, a data buffer unit and a data receiver M-RX;
the extension unit includes: the system comprises a data receiver U-RX, a downlink channel buffer unit, a broadcasting unit comprising n broadcasting ports, n data transmitters (S-TX1 … S-TXn), an uplink time division multiplexing time slot acquisition unit (uplink TDM time slot acquisition unit), n data receivers (S-RX1 … S-RXn), n buffer units (buffer unit 1 … buffer unit n) respectively connected with the n data receivers, an uplink channel switching unit and a data transmitter U-TX;
each of the n power cells (power cell 1, power cell 2 … power cell n) includes: a data receiver RX and a data transmitter TX;
the communication configuration unit is connected with the timing synchronization unit and used for setting a communication period;
the pulse generating unit is connected with the communication state control unit and used for generating unit pulses;
the timing synchronization unit is connected with the communication state control unit and used for starting communication based on the communication period set by the communication configuration unit;
the communication state control unit is connected with the data transmitter M-TX and used for receiving the unit pulse generated by the pulse generation unit and transmitting a formed data frame to the expansion unit through the data transmitter M-TX when the timing synchronization unit starts communication;
the data receiver U-RX is connected with the data transmitter M-TX in the pulse unit and used for receiving the data frame transmitted by the pulse unit;
one end of the downlink channel buffer unit is connected with the data receiver U-RX, and the other end of the downlink channel buffer unit is connected with the broadcasting unit and used for buffering the data frames and sending the buffered data frames to the broadcasting unit;
the n broadcasting ports (broadcasting port 1 … broadcasting port n) of the broadcasting unit are respectively connected with n data transmitters (S-TX1 … S-TXn) and are used for multicasting the data frames to n power units (power unit 1, power unit 2 … power unit n) through the n data transmitters (S-TX1 … S-TXn);
each power unit is used for receiving pulse data from the pulse unit, broadcasting number information from the broadcasting unit of the expansion unit and receiving a synchronous frame tail from the pulse unit;
the communication configuration unit is also used for setting access time slot distribution information;
the time division multiplexing time slot allocation unit (TDM time slot allocation unit) is connected with the communication configuration unit and is used for adding data receiver number information of an extension unit which is allowed to be accessed in a data frame by the communication state control unit according to the access time slot allocation information set by the communication configuration unit;
the data receiver M-RX is used for receiving the data transmitted by the power unit through the extension unit;
the data buffer unit is respectively connected with the data receiver M-RX and the data interface and is used for buffering data received by the data receiver M-RX and then sending the data to the data interface;
an uplink time division multiplexing time slot acquisition unit (uplink TDM time slot acquisition unit) is respectively connected with the broadcasting unit and the uplink channel switching unit and is used for changing an access channel of the uplink channel switching unit according to the acquired time slot allocation information;
the n data receivers (S-RX1 … S-RXn) are respectively connected with the n power units (power unit 1, power unit 2 … power unit n) and are used for receiving the data transmitted by the power units;
the n buffer units (buffer unit 1 …, buffer unit 2) are respectively connected with the n data receivers (S-RX1 … S-RXn) and the uplink channel switching unit, and are used for respectively buffering the received data sent by the power unit and then sending the buffered data to the uplink channel switching unit;
the uplink channel switching unit is connected with the data transmitter U-TX and used for transmitting the data transmitted by the power unit to the data receiver M-RX of the pulse unit through the data transmitter according to the access channel of the uplink channel switching unit;
each power cell comprises a data transmitter TX for transmitting the data of the power cell to the n data receivers (S-RX1 … S-RXn) of the spreading unit.
The working principle of the power unit communication expansion device disclosed by the embodiment is as follows: the pulse unit is connected with the expansion unit through a single pair of high-speed optical fibers (a downlink high-speed optical fiber and an uplink high-speed optical fiber), and the expansion unit is connected with a plurality of power units through a plurality of pairs of high-speed optical fibers, so that the expansion of a single-pair optical fiber interface at the side of the pulse unit to a plurality of pairs of power unit communication interfaces is realized.
In the process that the pulse unit sends data to a plurality of power units, the data of the pulse unit is sent in a fixed period communication mode, the timing synchronization unit starts communication according to a communication period set by the communication configuration unit at fixed intervals, the communication state control unit bears pulse of the pulse generation unit to form a data frame and sends the data frame to the expansion unit, the expansion unit receives pulse frame data from the pulse unit, the data is buffered by the downlink channel buffering unit, and meanwhile, the data is multicast to all expansion unit communication sending ports connected with receiving ports of the power units through the broadcasting unit. All power units will eventually receive burst data from the burst unit, port number information from the extension unit, and all frames will receive the sync trailer from the burst unit at the same time as shown in fig. 2.
The data uploading of the power unit adopts a TDM access token authorization mode, a TDM time slot distribution unit of the pulse unit adds an extension unit receiving port number S-RXn which allows access in a data frame through a communication state control unit according to access time slot distribution information set by communication configuration according to a period, the numbering information is broadcast unmodified to all power units by the broadcast unit, which will initiate data transmission upon determining that S-RXn matches the broadcast address received by the power unit, before the power unit receives the access time slot allocation information and starts data uploading, an uplink TDM time slot acquisition unit in the extension unit changes an access channel of an uplink channel switching unit according to the acquired time slot information, and the uploading data of the power unit allocated with the time slot is directly forwarded to the pulse unit through the uplink channel switching unit. Through the continuous circulation change of the token, the multi-power unit data uploading multiplexing access can be realized based on the same uplink channel.
Specifically, as shown in fig. 3, the data frame sent by the controller pulse unit includes a frame boundary start symbol 1, a blank field 2, a protocol version field 3, a power unit real-time issuing data field 4, a synchronization field 5, and a token field 6, and the controller will fill protocol version information, power unit issuing data segment information, and TDM token field authorization information in each sending.
Specifically, after receiving the data frame sent from the controller, the extension unit fills the transmission channel physical number in the position of the broadcast port number 2 in the frame structure shown in fig. 4 by the broadcast unit, and the rest remains unchanged. After receiving the data frame shown in fig. 4, the power unit firstly intercepts the data of the corresponding data segment in the data segment of the power unit according to the broadcast port number 2, and updates the output after receiving the synchronization field 5. The TDM token field contains the physical number authorized to upload data, and the sequence of the number is consistent with the port number 2, when the token field 6 is matched with the port number 2, the power unit receiving the frame confirms to acquire the TDM token, and can start to upload data.
Specifically, the structure of the upload data frame of the power unit is shown in fig. 5, and includes a frame boundary 1, a broadcast port number 2, a functional code 3, an upload data segment 4, a synchronization field 5, a check field 6, and a frame end boundary 7. The function code mainly provides attribute extension control for the data segment, and the synchronous domain is used for realizing synchronous sampling control.
In summary, the present invention can greatly reduce the number of interfaces of the optical connector at the controller end, and facilitate to quickly implement the number expansion of the power units connected to the controller. Meanwhile, compared with a ring network topology form, the full duplex data channel multiplexing mode of downlink multicast and uplink channel multiplexing is adopted, the independent uplink and downlink channels can provide a simple high-bandwidth data uploading mode for uplink data, and can also provide a smaller updating period for downlink real-time data and avoid performance degradation caused by the fact that the same channel is multiplexed by the uplink data.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A power cell communication extension apparatus, comprising: the device comprises a pulse unit, an expansion unit and n power units, wherein n is a positive integer greater than or equal to 2; wherein:
the pulse unit is connected with the expansion unit;
the expansion unit is connected with the n power units.
2. The apparatus of claim 1, wherein the pulse unit comprises: the device comprises a pulse generating unit, a communication state control unit, a communication configuration unit, a timing synchronization unit and a data transmitter; wherein:
the communication configuration unit is connected with the timing synchronization unit and is used for setting a communication period;
the pulse generating unit is connected with the communication state control unit and is used for generating unit pulses;
the timing synchronization unit is connected with the communication state control unit and used for starting communication based on the communication period set by the communication configuration unit;
the communication state control unit is connected with the data transmitter and used for receiving the unit pulse generated by the pulse generation unit and transmitting the formed data frame to the expansion unit through the data transmitter when the timing synchronization unit starts communication.
3. The apparatus of claim 2, wherein the extension unit comprises: a data receiver, a downlink channel buffer unit, a broadcasting unit including n broadcasting ports and n data transmitters; wherein:
the data receiver is connected with the data transmitter in the pulse unit and used for receiving the data frame sent by the pulse unit;
one end of the downlink channel buffer unit is connected with the data receiver, and the other end of the downlink channel buffer unit is connected with the broadcasting unit and used for buffering the data frame and sending the buffered data frame to the broadcasting unit;
the n broadcasting ports of the broadcasting unit are respectively connected with the n data transmitters and are used for multicasting the data frames to the n power units through the n data transmitters.
4. The apparatus of claim 3 wherein each of said power units includes a data receiver for receiving burst data from said burst unit, broadcast number information from a broadcast unit of said spreading unit, and a synchronization trailer from said burst unit.
5. The apparatus of claim 4, wherein the communication configuration unit is further configured to set access slot assignment information.
6. The apparatus of claim 5, wherein the pulse unit further comprises: time division multiplexing time slot distribution unit, data interface, data buffer unit and a data receiver; wherein:
the time division multiplexing time slot allocation unit is connected with the communication configuration unit and is used for adding data receiver number information of an extension unit which is allowed to be accessed in a data frame by the communication state control unit according to cycle according to access time slot allocation information set by the communication configuration unit;
the data receiver is used for receiving data sent by the power unit through the extension unit;
the data buffer unit is respectively connected with the data receiver and the data interface and is used for buffering the data received by the data receiver and then sending the buffered data to the data interface.
7. The apparatus of claim 6, wherein the extension unit further comprises: the system comprises an uplink time division multiplexing time slot acquisition unit, n data receivers, n buffer units respectively connected with the n data receivers, an uplink channel switching unit and a data transmitter; wherein;
the uplink time division multiplexing time slot acquisition unit is respectively connected with the broadcasting unit and the uplink channel switching unit and is used for changing an access channel of the uplink channel switching unit according to the acquired time slot allocation information;
the n data receivers are respectively connected with the n power units and used for receiving data sent by the power units;
the n buffer units are respectively connected with the n data receivers and the uplink channel switching unit, and are used for respectively buffering the received data sent by the power unit and then sending the buffered data to the uplink channel switching unit;
and the uplink channel switching unit is connected with the data transmitter and is used for transmitting the data transmitted by the power unit to the data receiver of the pulse unit through the data transmitter according to the access channel of the uplink channel switching unit.
8. The apparatus of claim 7, wherein each of the power units comprises a data transmitter for transmitting data of the power unit to the n data receivers of the spreading unit.
9. The apparatus of claim 1, wherein the pulse unit is connected to the expansion unit by a single pair of high speed optical fibers.
10. The apparatus of claim 1, wherein the expansion unit is connected to n of the power units by n pairs of high speed optical fibers.
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