CN115348331A - Protocol conversion device and method for power grid communication - Google Patents
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Abstract
The invention provides a protocol conversion device and a method for power grid communication, which relate to the technical field of power supply or power distribution switching devices, wherein the protocol conversion device comprises: the service interface unit is used for receiving service data and identifying and processing the service data; the service data comprises IP data and TDM time division multiplexing time slot data; the bus is used for transmitting the service data; the protocol container is in communication connection with the service interface unit through the bus, and protocol conversion between the same service data or between different service data is realized; and the cross connection unit is in communication connection with the protocol container, and is used for performing cross and exchange and clock synchronization processing on the converted service data. Compared with the prior art, the method and the system realize the mutual conversion and transmission among multiple channels or multiple protocol channels, and ensure the reliable operation of the intelligent power grid.
Description
Technical Field
The invention relates to the technical field of power supply or power distribution switching devices, in particular to a protocol conversion device and method for power grid communication.
Background
The safety of the power grid system is related to aspects of production and life, the stable operation of the intelligent power grid is independent of the stable operation of the communication system, especially services such as dispatching communication, relay protection signals, unattended systems and the like, especially the stable and uninterrupted operation of the power grid communication is depended on, and related interface types comprise a 2M optical interface, a 2M electric interface, a telephone interface, an Ethernet interface and the like. However, due to the limitations of objective conditions and technical levels, the transmission channel is relatively single, for example, a wide E1 interface is generally used for transmission in an SDH channel, but mutual conversion and transmission between multiple channels or multiple protocol channels cannot be realized, which brings a certain hidden trouble to the stable and uninterrupted operation of the smart grid.
Disclosure of Invention
The invention solves the problem of how to realize the mutual conversion and transmission among multiple channels or multiple protocol channels and ensure the reliable operation of the intelligent power grid.
In order to solve the above problem, the present invention provides a protocol conversion apparatus for grid communication, the protocol conversion apparatus comprising:
the service interface unit is used for receiving service data and identifying and processing the service data; the service data comprises IP data and TDM time division multiplexing time slot data;
the bus is used for transmitting the service data;
the protocol container is in communication connection with the service interface unit through the bus and is used for realizing protocol conversion between the same service data or between different service data;
and the cross connection unit is in communication connection with the protocol container and is used for performing cross, exchange and clock synchronization processing on the converted service data.
Optionally, the protocol container comprises a first protocol container and a second protocol container; the first protocol container is used for realizing protocol conversion between the IP data and the TDM time division multiplexing time slot data; the second protocol container is used for realizing the protocol conversion between the non-standard TDM time division multiplexing time slot data.
Optionally, the first protocol container is provided with a first protocol conversion rule, and the second protocol container is provided with a second protocol conversion rule;
the first protocol conversion rule is used for realizing protocol conversion between the IP data and the standard TDM time division multiplexing time slot data;
the second protocol conversion rule is used for realizing the protocol conversion between the non-standard TDM time division multiplexing time slot data.
Optionally, the protocol conversion apparatus further includes: the system management unit is respectively in communication connection with the service interface unit, the protocol container and the cross connection unit, and is used for monitoring the current network traffic load of a port at a switching node in the cross connection unit and switching a link according to the current network traffic load;
the storage unit is respectively in communication connection with the service interface unit and the cross connection unit and is used for realizing storage of operation data and caching and forwarding of partial data;
and the transmission unit is in communication connection with the cross connection unit and is used for transmitting the service data after crossing through a plurality of transmission channels.
Optionally, switching the link according to the network traffic load of the port specifically includes:
the port is provided with a specific threshold value, and when the network traffic load of the port exceeds the specific threshold value, the system management unit switches the link to a new light-load link.
Optionally, the service interface unit is provided with different transmission interfaces, the transmission interfaces are configured to be redundant backup with each other, and backup data is stored in the storage unit.
Compared with the prior art, the protocol conversion device for power grid communication has the advantages that: the invention provides a protocol conversion device for power grid communication, which receives different service data through a service interface unit, enters a protocol container through different buses after processing to perform protocol conversion, can realize different types of service access while realizing protocol conversion, and performs cross, exchange and clock synchronization processing on the converted service data through entering a cross connection unit to obtain cross data, thereby realizing mutual conversion and transmission among multiple channels or multiple protocol channels and ensuring the reliable operation of an intelligent power grid.
In order to solve the above technical problem, the present invention further provides a protocol conversion method for grid communication, where based on the protocol conversion apparatus for grid communication, the protocol conversion method for grid communication includes:
acquiring service data;
obtaining conversion data by performing protocol conversion on the service data;
and obtaining cross data by crossing or exchanging the conversion data.
Optionally, the service data includes real-time service data and non-real-time service data, and performing protocol conversion on the service data to obtain conversion data specifically includes:
when the service data is real-time service data, transmitting the real-time service data to a first protocol converter through a corresponding bus to perform protocol conversion to obtain conversion data;
and when the service data is non-real-time service data, transmitting the non-real-time service data to a second protocol converter through the corresponding bus to perform protocol conversion, thereby obtaining the conversion data.
Optionally, the protocol conversion method for grid communication further includes: and transmitting the crossed data through a plurality of transmission channels.
Optionally, the transmission channels include an IP packet transport network channel, a TDM transport network channel, and a fast ethernet channel, and the transmitting the cross data through the multiple transmission channels specifically includes:
transmitting the exchanged non-real-time service data through the IP packet transmission network channel;
and transmitting the crossed real-time service data through the TDM transmission network channel or the fast Ethernet channel.
The advantages of the protocol conversion method for power grid communication and the protocol conversion device for power grid communication in comparison with the prior art are the same, and are not described herein again.
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Fig. 1 is one of the structural diagrams of a protocol conversion device for grid communication according to an embodiment of the present invention;
fig. 2 is a second structure diagram of a protocol conversion device for power grid communication according to an embodiment of the present invention;
fig. 3 is a flowchart of a protocol conversion method for grid communication according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and exhaustively described below with reference to the accompanying drawings.
In the description of the embodiments herein, the description of the term "some embodiments" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Throughout this specification, the schematic representations of the terms used above do not necessarily refer to the same implementation or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed. The embodiments 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. For the structures, products and the like disclosed by the embodiments, the description is relatively simple because the structures, the products and the like correspond to the parts disclosed by the embodiments, and the relevant parts can be just described by referring to the method part.
As shown in fig. 1, in one embodiment, a protocol conversion device for grid communication is provided. The protocol conversion device specifically comprises:
the service interface unit is used for receiving service data and identifying and processing the service data; the service data comprises IP data and TDM time division multiplexing time slot data;
the bus is used for transmitting the service data;
the protocol container is in communication connection with the service interface unit through the bus and is used for realizing protocol conversion between the same service data or between different service data;
and the cross connection unit is in communication connection with the protocol container and is used for performing cross, exchange and clock synchronization processing on the converted service data.
In some embodiments, the service interface unit includes various interface types, and the service interface unit identifies service data received through various interfaces, performs signaling and coding processing on the service data, and is connected to the protocol container through the system bus to perform protocol conversion. For example: the service interface type can be selected from SDH optical interface, IP optical interface/electric interface, E1 interface, C37.94 interface and other interface types, and the IP interface is divided into common IP interface and TDMoIP interface based on TDM bus;
wherein, IP (Internet Protocol) refers to Internet interconnection Protocol, which is a network layer Protocol in TCP/IP system; TDM (time-division multiplexing) is a time division multiplexing technique, in which different signals are interleaved in different time periods and transmitted along the same channel; a communication technology of extracting and restoring signals in each time period into original signals by using a certain method at a receiving end; an SDH (Synchronous Digital Hierarchy) is a technical system which provides information structures of corresponding levels for transmission of Digital signals of different speeds according to the recommendation definition of ITU-T, and comprises a multiplexing method, a mapping method and a related synchronization method; e1 is European 30-way PCM abbreviation.
In some embodiments, because the types of the service data accessed by the service interface unit are different, the bus includes a TCP/IP bus or a TDM bus, the service data is connected to the protocol container through the bus, and the protocol conversion between the same service data or different service data is realized in the protocol container to form a bandwidth granule in a standard TDM time division multiplexing system;
the difference of the buses is the difference of the bandwidth, wherein the service capacity is not specified, the bus bandwidth can be designed according to the requirement of the service capacity, or a parallel bus or a serial bus can be selected.
The cross connection unit is the core unit of the protocol conversion device and is responsible for the crossing of TDM time division multiplexing time slot data, the time slot data entering the cross connection unit passes the protocol conversion of the protocol container in advance, the rule of the crossing is that the time slot data between the same bandwidth particles are crossed, such as the crossing between VC12 and VC12, thereby realizing different service routes;
for example, if a substation has a plurality of E1 s to be transmitted to different other sites, each E1 time slot of the substation needs to be in a different time slot crossed to a transmission interface, otherwise, each E1 cannot be transmitted according to a specified site required, and the service is different or chaotic.
The present embodiment provides a protocol conversion apparatus for power grid communication, which receives and processes different service data through a service interface unit, performs protocol conversion processing on the processed data in a protocol container through a corresponding bus, and enters a cross connection unit to perform cross, exchange and clock synchronization processing after standard time slot particles are formed, so as to obtain cross service data, thereby implementing mutual conversion and transmission between multiple channels or multiple protocol channels, and ensuring reliable operation of an intelligent power grid.
In some embodiments, the protocol container comprises a first protocol container and a second protocol container; the first protocol container is used for realizing protocol conversion between the IP data and the standard TDM time division multiplexing time slot data; the second protocol container is used for realizing the protocol conversion between the non-standard TDM time division multiplexing time slot data.
In some embodiments, the first protocol container is provided with a first protocol conversion rule, and the second protocol container is provided with a second protocol conversion rule;
the first protocol conversion rule is used for realizing protocol conversion between the IP data and the standard TDM time division multiplexing time slot data;
the second protocol conversion rule is used for realizing the protocol conversion between the non-standard TDM time division multiplexing time slot data.
In some preferred embodiments, the first protocol container is a protocol container a, and protocol conversion between IP data transmitted through a TCP/IP bus and TDM time division multiplexing timeslot data is completed, and the converted data can enter a cross connection unit for data crossing, where the TDM time division multiplexing timeslot data is divided into VC12, VC3, VC4, N × 64Kbit/s; the second protocol container is a protocol container B, and the protocol conversion between nonstandard TDM time division multiplexing time slot data is completed;
wherein, the protocol container is preset with protocol conversion rules; a protocol conversion rule between IP data and TDM time division multiplexing time slot data is preset in the protocol container A;
various protocol conversion rules (without IP access) of TDM time division multiplexing time slot data are preset in the protocol container B.
As shown in fig. 2, in some embodiments, the protocol conversion apparatus further includes: the system management unit is respectively in communication connection with the service interface unit, the protocol container and the cross connection unit, and is used for monitoring a port at a switching node and switching a link according to the network traffic load of the port;
the storage unit is respectively in communication connection with the service interface unit and the cross connection unit and is used for realizing storage of operation data and caching and forwarding of partial data;
and the transmission unit is in communication connection with the cross connection unit and is used for transmitting the service data after crossing through a plurality of transmission channels.
In a specific embodiment, the protocol conversion device receives different service data through the service interface unit, and transmits the different service data to the protocol container through the TCP/IP bus or the TDM bus after processing, the protocol container includes a first protocol container and a second protocol container, the first protocol container completes protocol conversion between IP data in the service data and standard TDM time division multiplexing time slot data through the TCP/IP bus, the second protocol container completes protocol conversion between nonstandard TDM time division multiplexing time slot data in the service data through the TDM bus, and the converted service data enters the cross connection unit to perform cross, exchange and clock synchronization processing to obtain cross data; in the operation process of the protocol conversion device, the storage unit realizes the storage of operation data and the caching and forwarding of partial data, and the system management unit monitors the port at the switching node in real time in the transmission and switching process of service data and switches the link according to the network flow load of the port.
In some preferred embodiments, the system management unit controls each unit of the device to work cooperatively, and implements monitoring of the working state of the protocol conversion device and processing of the alarm.
The working state of the protocol conversion device generally refers to: the connection state of each functional module or unit and interface and line, for example: when one path of service communication is interrupted, the service interface related to the path of service communication can show different states, such as indication lamp display abnormity, data error code or terminal, and the phenomena can be fed back to a network management system of the communication equipment through the system management unit, so that maintenance personnel can conveniently inquire and analyze the fault reason.
In some embodiments, switching the link according to the network traffic load of the port specifically includes: the port is provided with a specific threshold value, and when the network traffic load of the port exceeds the specific threshold value, the system management unit switches the link to a new light-load link.
In some preferred embodiments, the prior art proposes that the queuing delay is a key for solving the data transmission delay, so that the data transmission delay is solved by a delay-insensitive data stream Scheduling Algorithm LBFS (delay-Based Flow Scheduling Algorithm) Based on the VL-EDF Scheduling Algorithm in the cross-connect unit according to the VL-EDF queue Scheduling Algorithm. The delay insensitive data flow scheduling algorithm monitors the ports at the exchange nodes, and switches the delay insensitive data flow on the corresponding link to a new light-load link when the network flow load of the ports exceeds a preset flow load value, so that the delay performance of the delay sensitive data flow is improved, and the reliability of the intelligent power grid communication network is ensured;
the VL-EDF (virtual latency earliestdeiadlinefirst task) queue scheduling algorithm determines the priority of the task according to the starting deadline of the task.
In some embodiments, the service interface unit is provided with different transmission interfaces, the transmission interfaces are configured to be redundant with each other, and the backup data is stored in the storage unit.
In some preferred embodiments, the service transmission interfaces are configured to be mutually backed up for redundancy, where redundancy backup does not refer to redundancy backup between devices, but refers to redundancy backup between different service interfaces of the service interface unit, and this function ensures reliability of service transmission, and when one of the mutually redundant transmission interfaces is damaged or a fault occurs in a transmission line connected to the mutually redundant transmission line, normal transmission of the service is not affected.
In some preferred embodiments, the signal is damaged in transmission to generate bit errors because the voltage of the signal is changed by decay in the signal transmission; noise, pulses from alternating current or lightning, transmission equipment failure, and other factors can cause bit errors (e.g., a 1 is transmitted and a 0 is received; or vice versa). For various reasons, errors are inevitably generated in the transmission process of digital signals, and in order to reduce the generation of errors, measures are taken to improve the indexes of an optical interface, enhance the electromagnetic compatibility and increase the stability.
Therefore, the present embodiment provides a protocol conversion apparatus for power grid communication, which receives different service data through a service interface unit, enters a protocol container through different buses after processing to perform protocol conversion, and can implement different types of service access while implementing protocol conversion, where the converted service data enters a cross connection unit to perform cross, exchange, and clock synchronization processing, so as to obtain cross data, implement mutual conversion and transmission between multiple channels or multiple protocol channels, and ensure reliable operation of an intelligent power grid.
Important services of the existing power grid need to ensure smooth communication all the time, high requirements are put forward on the real-time performance and communication effectiveness of the services, and realization of backup and multi-routing transmission of the important communication services is one of the essential means for realizing the communication effectiveness, for example, in a 35kV voltage class transformer substation, an SDH dispatching network does not realize backup of networks A and B, and now the same service interface can realize transmission backup between the SDH network and an IP network through a protocol conversion device for power grid communication in the embodiment, so that the normal operation of key services of the power grid is ensured.
As shown in fig. 3, in one embodiment, there is provided a protocol conversion method for grid communication, including:
step S1, acquiring service data;
s2, performing protocol conversion on the service data to obtain conversion data;
and S3, performing cross or exchange on the conversion data to obtain cross data.
The embodiment provides a protocol conversion method for power grid communication, which obtains different service data, performs corresponding protocol conversion on the different service data to obtain converted service data, and performs cross or exchange processing on the converted service data to obtain cross service data, so as to realize mutual conversion and transmission among multiple channels or multiple protocol channels and ensure reliable operation of an intelligent power grid.
In some embodiments, in step S2, the service data includes real-time service data and non-real-time service data, and performing protocol conversion on the service data to obtain conversion data specifically includes:
step S21, when the service data is real-time service data, transmitting the real-time service data to a first protocol converter through a corresponding bus to perform protocol conversion, and obtaining the conversion data;
and step S22, when the service data is non-real-time service data, transmitting the non-real-time service data to a second protocol converter through the corresponding bus to perform protocol conversion, and obtaining the conversion data.
In some preferred embodiments, according to the end communication service characteristics of private networks in the power grid industry and other industries, the interface rate requirement is not very high, generally below giga, and its applications can be mainly divided into two categories: real-time services such as telephony, conferencing, grid control, etc.; non-real-time services such as environmental data, video storage, device network management, etc.; the real-time service refers to the TDM time division multiplexing time slot data and the IP service guaranteed by QOS, the TDM time division multiplexing time slot data is directly communicated with the time slot, and the TDM time division multiplexing time slot data is naturally an independent channel and is transmitted in real time.
When the service data is switched between different transmission channels, the TDM and IP transmission channels are allowed to be switched, but the delay and the loss of the transmission channels of two different protocols are different, and the service transmission switching needs to solve the synchronization problem, and the data and the line clock are correspondingly adjusted by adopting a cache technology or a multi-level cache technology to realize the synchronous switching of the service;
the QOS (Quality of Service) is a security mechanism of a network, and is a technique for solving problems such as network delay and congestion, in which a network can provide better Service capability for specified network communication by using various basic technologies.
In some preferred embodiments, the protocol conversion method for power grid communication further includes:
and S4, transmitting the crossed data through a plurality of transmission channels.
In some embodiments, in step S4, the transmission channels include an IP packet transmission network channel, a TDM transmission network channel, and a fast ethernet channel, and the transmitting the cross data through the multiple transmission channels specifically includes:
step S41, the exchanged non-real-time service data is transmitted through the IP packet transmission network channel;
step S42, transmitting the crossed real-time service data through the TDM transmission network channel or the fast ethernet channel.
In some preferred embodiments, the transmission channel is switched to be between TDM and TDM channels, between TDM and IP channels, and between IP and IP channels, considering that there are both real-time services and non-real-time services in the power grid communication services, after the non-real-time services access the system, the TCP/IP bus access protocol container a performs protocol conversion, and then the converted data is sent to the IP packet transmission network channel through the switching processing of the cross connection unit, and similarly, the real-time services access the protocol container B from the TDM bus, and then the converted data is sent to the TDM transmission network channel or the fast ethernet channel through the cross processing of the cross connection unit.
Therefore, this embodiment provides a protocol conversion method for power grid communication, which obtains different service data, performs corresponding protocol conversion on the different service data to obtain converted service data, performs cross or exchange processing on the converted service data to obtain cross service data, and transmits the cross data through multiple transmission channels, so as to implement mutual conversion and transmission between multiple channels or multiple protocol channels, and ensure reliable operation of an intelligent power grid.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. A protocol conversion device for grid communication, the protocol conversion device comprising:
the service interface unit is used for receiving service data and identifying and processing the service data; the service data comprises IP data and TDM time division multiplexing time slot data;
the bus is used for transmitting the service data;
the protocol container is in communication connection with the service interface unit through the bus, and protocol conversion between the same service data or between different service data is realized;
and the cross connection unit is in communication connection with the protocol container and is used for carrying out cross and exchange and clock synchronization processing on the converted service data.
2. The protocol conversion apparatus according to claim 1, wherein the protocol container includes a first protocol container and a second protocol container; the first protocol container is used for realizing protocol conversion between the IP data and the standard TDM time division multiplexing time slot data; the second protocol container is used for realizing the protocol conversion between the non-standard TDM time division multiplexing time slot data.
3. The protocol conversion device according to claim 2, wherein the first protocol container is provided with a first protocol conversion rule, and the second protocol container is provided with a second protocol conversion rule;
the first protocol conversion rule is a protocol conversion rule between the IP data and the standard TDM time division multiplexing time slot data;
the second protocol conversion rule is a non-standard protocol conversion rule between the TDM time division multiplexing timeslot data.
4. The protocol conversion apparatus according to claim 1, further comprising:
the system management unit is respectively in communication connection with the service interface unit, the protocol container and the cross connection unit, and is used for monitoring a port at a switching node and switching a link according to the network traffic load of the port;
the storage unit is respectively in communication connection with the service interface unit and the cross connection unit and is used for realizing storage of operation data and caching and forwarding of partial data;
and the transmission unit is in communication connection with the cross connection unit and is used for transmitting the service data after crossing through a plurality of transmission channels.
5. The protocol conversion device according to claim 4, wherein switching links according to the network traffic load of the port specifically includes:
the port is provided with a specific threshold value, and when the network traffic load of the port exceeds the specific threshold value, the system management unit switches the link to a new light-load link.
6. The protocol conversion device according to claim 4, wherein the service interface unit is provided with different transmission interfaces, and the transmission interfaces are configured to be mutually redundant and backup data is stored in the storage unit.
7. A protocol conversion method for power grid communication, which is based on the protocol conversion device for power grid communication according to any one of claims 1 to 6, and comprises the following steps:
acquiring service data;
obtaining conversion data by performing protocol conversion on the service data;
and obtaining cross data by crossing or exchanging the conversion data.
8. The protocol conversion method for power grid communication according to claim 7, wherein the service data includes real-time service data and non-real-time service data, and the obtaining of the conversion data by performing protocol conversion on the service data specifically includes:
when the service data is real-time service data, transmitting the real-time service data to a first protocol converter through a corresponding bus to perform protocol conversion to obtain conversion data;
and when the service data is non-real-time service data, transmitting the non-real-time service data to a second protocol converter through the corresponding bus to perform protocol conversion, so as to obtain the conversion data.
9. The protocol conversion method for grid communication according to claim 8, further comprising:
and transmitting the crossed data through a plurality of transmission channels.
10. The protocol conversion method for grid communication according to claim 9, wherein the transmission channels include an IP packet transport network channel, a TDM transport network channel, and a fast ethernet channel, and the transmitting the cross data through a plurality of transmission channels specifically includes:
transmitting the exchanged non-real-time service data through the IP packet transmission network channel;
and transmitting the crossed real-time service data through the TDM transmission network channel or the fast Ethernet channel.
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