CN104201781A - Small-power wireless private network system applied to smart grid - Google Patents
Small-power wireless private network system applied to smart grid Download PDFInfo
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- CN104201781A CN104201781A CN201410457995.4A CN201410457995A CN104201781A CN 104201781 A CN104201781 A CN 104201781A CN 201410457995 A CN201410457995 A CN 201410457995A CN 104201781 A CN104201781 A CN 104201781A
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- 239000013307 optical fiber Substances 0.000 claims abstract description 23
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- 239000000835 fiber Substances 0.000 claims 1
- 230000004927 fusion Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 25
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
The invention discloses a small-power wireless private network system applied to a smart grid. A deployment mode of the system can be fused with an optical fiber, carrier wave or GPRS (general packet radio service) mode. A specific system fusion mode includes that a distribution network automation DSCADA system is communicated with a GPRS network through a data acquisition and management front end via a VPN (virtual private network) private line, and the GPRS network is communicated with power distribution network terminals via wireless gateways; or the distribution network automation DSCADA system is communicated with the power distribution network terminals through the wireless gateways via optical-fiber network data communication terminals; or the distribution network automation DSCADA system is in data communication with the power distribution network terminals through the wireless gateways via an optical-fiber network data system.
Description
The technical field is as follows:
the invention relates to a small electric power wireless private network system applied to a smart power grid.
Background art:
along with the deep construction of the smart power grid, more and more intelligent devices need to be connected into a comprehensive dispatching system of the smart power grid, and the national power grid company has strong overall requirements on the construction of the smart power grid, so that the construction specification of the smart power grid is guaranteed to be orderly promoted, and the construction of a power consumption information acquisition system of a power consumer, namely 'full coverage, full acquisition and full prepayment', is realized. Particularly, with the deep construction of an integrated platform system of marketing, distribution network and scheduling systems of the smart power grid, higher requirements on speed, reliability, instantaneity and compatibility of terminals and communication systems in various systems of marketing, distribution network and scheduling are provided.
The smart grid communication system mainly comprises three communication modes, namely an optical fiber communication system, a carrier communication system and a wireless communication system at present, wherein the wireless communication mode mainly refers to a wireless communication mode consisting of GPRS, 3G and other wireless public networks, and the communication mode is applied to centralized reading of a marketing system and part of one-remote and two-remote power distribution terminal systems in a large scale at present.
The existing wireless public network communication system has the problems of higher charging cost, incomplete wireless signal coverage and the like. Similarly, in the optical fiber communication system, the construction and laying cost is high, and in some specific areas, the optical fiber communication system is not the most suitable communication system solution for large-scale laying networking. In addition, in a distribution network communication system, equipment is often laid on the side of a 10KV medium-voltage system, and low-voltage electricity taking of the equipment is a relatively troublesome system solution.
In the face of the above-mentioned troublesome technical problem in the smart grid, it is more appropriate to adopt the micropower wireless system as a communication solution for a specific area in the smart grid system, mainly solving the following problems in the smart grid system:
laying cost and difficulty problem: in an intelligent power grid communication system, the laying of a communication line is a difficult construction problem, a low-power wireless system adopts short-distance power amplification, the area coverage of the communication system can be realized, a wireless communication mode is adopted in one area, and the communication line does not need to be laid.
The wireless public network can not fully cover the problem: the wireless public network borrows the wireless public network of a telecom operator, and in a remote area, a part of closed space and the coverage of the wireless public network are not complete, so that a plurality of users and power distribution data cannot be uploaded in time. A micro-power wireless communication system is adopted to construct a regional wireless private network, and timely and effective transmission of wireless data in a region is guaranteed.
The problem that the reliability of wireless communication is not high: because the communication system of the wireless public network is adopted and the telecommunication data transmission network is shared, the wireless public network can be easily captured or interfered by a large number of irrelevant users, and great potential safety hazards exist. A micro-power wireless communication mode is adopted, and a safety encryption and safety redundancy system is integrated in the system, so that the safety and reliability of data communication can be guaranteed from a physical layer and a network layer.
The problem of low-voltage electricity taking in a distribution network system is as follows: in a remote 10KV distribution network area, the problem of power taking of communication equipment and terminal equipment is a great technical problem which troubles system popularization. By adopting a low-power-consumption wireless communication system and reducing power consumption and an active dormancy mode, the power consumption of the equipment can be in the mw level, and the equipment operation for a long time can be maintained by adopting a battery power supply mode on part of sites.
In summary, the regional power communication private network constructed by the low-power wireless communication mode can effectively solve the difficult system problem in the smart grid communication system, and provides a new communication mode for the construction of the smart grid communication system.
The invention content is as follows:
in order to overcome the defects of the prior art, the invention aims to provide a small-power wireless private network system applied to a smart grid, which is suitable for occasions with smaller data throughput, less network construction investment, higher network safety requirement and inconvenience for frequently replacing a power supply or charging.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the small wireless private network system applied to the intelligent power grid has the advantages that the deployment mode of the system can be fused with an optical fiber mode, a carrier wave mode or a GPRS mode, and the specific system fusion mode is as follows:
the distribution network automation DSCADA system is communicated with a GPRS network by a VPN special line through a data acquisition management front end, and the GPRS network is communicated with the power distribution network terminal through each wireless gateway; or,
the distribution network automation DSCADA system is communicated with the electricity utilization acquisition terminal through the optical network data communication terminal through each wireless concentrator and each wireless gateway; or,
the distribution network automation DSCADA system carries out data communication with the power distribution network terminal through the optical network data system through the main carrier communication machine, the auxiliary carrier communication machine and each wireless gateway.
In a communication management platform for low-voltage centralized meter reading, a micropower wireless communication system is combined with an existing optical fiber communication system to jointly establish an intelligent underlying network platform of the low-voltage centralized meter reading system, and the specific network topology architecture is as follows:
the power grid marketing management system is communicated with the power utilization acquisition terminal through the optical network data communication terminal through each wireless concentrator and each wireless gateway; or,
the power grid marketing management system adopts VPN special line to communicate with GPRS network through data acquisition management front end, and the GPRS network communicates with the power consumption acquisition terminal through each wireless gateway.
Compared with the prior art, the invention has the beneficial effects that:
the national grid company has strong overall requirements on intelligent grid construction, and guarantees that the intelligent grid construction is in order and advanced, and the construction of a power consumer electricity consumption information acquisition system is realized in a full-coverage, full-acquisition and full-prepayment mode. The reading coverage range of the low-voltage resident household meter is the widest, the user quantity is the largest, and the method is the key point for realizing the target.
The low-voltage meter reading system is divided into two types according to meter reading communication modes: wired and wireless. The wired meter reading mode mainly uses an RS-485 bus and a low-voltage carrier wave meter reading system; the wireless meter reading application is mainly a GPRS wireless public network communication module. In the current low-voltage meter reading system, a communication mode of combining a collector and a concentrator is adopted, and a communication model of mixing two communication modes is often adopted: a low-voltage carrier communication mode is adopted between the collector and the concentrator, and a GPRS communication mode is adopted between the concentrator and the meter reading server.
However, the current low-voltage meter reading system has a plurality of defects: the low-voltage distribution network has complex environment and large interference, and the low-voltage power line carrier wave is difficult to ensure the meter reading stability; for the power utilization environment of multiple variable power supplies, a carrier meter reading scheme is not suitable to be implemented due to carrier crosstalk; because the carrier transmission distance is limited, the meter reading coverage range needs to be ensured in a relay mode, the low-density houses such as rural areas, urban and rural junctions and the like cannot be fully covered, and the implementation difficulty is very high; the low-voltage power line narrow-band carrier has low speed and poor real-time performance, and cannot meet the requirements of remote prepayment and remote switching on and off.
The micro-power wireless communication technology can overcome the defects of other communication modes in certain meter reading application occasions, is convenient to construct, does not need to additionally lay cables, and can be conveniently installed by common workers; the communication is not limited by the characteristics of a power grid, and a meter reading scheme can be conveniently and rapidly implemented for cross-district and complex power utilization environments: the communication speed is fast, the real-time is high, and the applications such as remote prepayment, remote switching on and switching off are conveniently implemented.
In the communication management platform of low-voltage centralized meter reading, a micropower wireless communication system is combined with the existing optical fiber communication system and a wireless public network GPRS communication system to jointly establish an intelligent bottom layer network platform of the low-voltage centralized meter reading system.
The intelligent degree of the power grid is higher and higher, and the requirement of an intelligent substation system is higher and higher. The intelligent transformer substation adopts advanced, reliable, integrated and environment-friendly intelligent equipment, takes total station information digitization, communication platform networking and information sharing standardization as basic requirements, automatically completes basic functions of information acquisition, measurement, control, protection, metering, detection and the like, and simultaneously has advanced functions of supporting real-time automatic control, intelligent adjustment, on-line analysis decision, cooperative interaction and the like of a power grid.
A micro-power wireless network is adopted to cover the equipment management area of each intelligent substation, an equipment wireless local area network in the intelligent substation is built, the security and the detection equipment in the intelligent substation are interconnected and intercommunicated, and the information in the substation can be shared to the greatest extent.
The strong construction work of the smart power grid needs to be constructed, and an important construction work content is to realize distribution network automation. In a 10KV and 35KV medium-voltage power grid, the running state of the power grid is automatically detected, fault analysis, effective isolation and quick recovery are realized, and the reliability and safety of power utilization of users are guaranteed. However, with the development of the construction surface of the distribution network automation system, the communication system of the distribution network automation system faces the characteristics of complex field conditions, various equipment levels, high reliability requirements and the like, and accordingly, the construction scheme of the communication system of the distribution network automation system is also various and includes an optical fiber communication system, a wireless communication mode, a medium-voltage carrier communication mode and the like.
In the current construction scheme of the distribution network automatic communication system, the reliability and the safety performance price of the optical fiber communication mode are high, and the optical fiber communication mode is suitable for the construction scheme of the distribution network communication system in the urban core area and the new area, but the construction is complex, the use cost is high, and the optical fiber communication mode is not suitable for the construction of large-scale suburban distribution networks, old urban distribution networks and rural distribution network communication systems. The carrier communication mode is a relatively mature communication mode, and the construction is relatively convenient, but because the primary net rack is used as a communication transmission medium, the interference of the power cable environment is easy to occur, and certain limitation exists. At present, the GPRS or 3G wireless public network communication technology adopted in a large scale is also widely adopted in a distribution network automation system, but because the GPRS or the 3G wireless public network communication technology is easily interfered by public network signals and the safety and the reliability cannot meet the requirements of the distribution network system, the GPRS or the 3G wireless public network communication technology can only be applied to one-remote and two-remote communication sites at present to realize the monitoring of the state of field equipment.
A micropower wireless communication system is used as a communication mode for distribution network automation, a private network based on micropower wireless area coverage is constructed in a distribution network automation area field, and the modes of optical fiber communication, wireless public network communication and medium-voltage carrier communication can be effectively supplemented in scheme cost, reliability and safety. The micropower wireless communication system in the system adopts two data conversion models of network data exchange and application data capture and sending, and can meet the compatibility and interconnection with various communication modes such as optical fiber, wireless, carrier wave and the like; and the micropower wireless in the system designs a mutual backup system based on network routing and a mutual backup mode based on an uplink interface, so that single-point or multi-point failure of the micropower wireless network can be resisted, and the reliability and the safety of the system are ensured to the greatest extent. In addition, in a medium-voltage distribution network system, the low-voltage power taking mode does not always disturb the development of a distribution network automation system, and the micro-power wireless communication system is adopted, and the low-power consumption and triggering awakening mode of the micro-power wireless system is combined, so that the system power consumption can be kept for a long time by adopting dry batteries for power supply.
Description of the drawings:
FIG. 1 is a schematic diagram of a system framework of the present invention; FIG. 2 is a schematic diagram of a micropower wireless local area private network architecture of a fusion construction area with a GPRS system; FIG. 3 is a schematic diagram of a micropower wireless LAN architecture integrated with an optical fiber system to construct a domain; fig. 4 is a schematic diagram of a communication mode integrated with a carrier communication system; FIG. 5 is a schematic diagram of a low-voltage meter reading communication network composed of a micropower wireless + optical fiber communication system; fig. 6 is a schematic diagram of a low-voltage meter reading communication network composed of a micropower wireless + GPRS communication system.
The present invention will be further described with reference to the following detailed description and accompanying drawings.
The specific implementation mode is as follows:
example (b): the invention relates to a small electric power wireless private network system applied to a smart grid, wherein the deployment mode of the system can be fused with an optical fiber, a carrier wave or a GPRS mode, and the specific system fusion mode is as follows:
(and the micro-power wireless local area network of the area is constructed by fusing with the GPRS system): the distribution network automation DSCADA system is communicated with a GPRS network by a VPN special line through a data acquisition management front end, and the GPRS network is communicated with the power distribution network terminal through each wireless gateway; or,
(fusion with optical fiber system to construct regional micropower wireless private area network): the distribution network automation DSCADA system is communicated with the electricity utilization acquisition terminal through the optical network data communication terminal through each wireless concentrator and each wireless gateway; or,
(communication system integrated with carrier communication system): the distribution network automation DSCADA system carries out data communication with the power distribution network terminal through the optical network data system through the main carrier communication machine, the auxiliary carrier communication machine and each wireless gateway.
In a communication management platform for low-voltage centralized meter reading, a micropower wireless communication system is combined with an existing optical fiber communication system to jointly establish an intelligent underlying network platform of the low-voltage centralized meter reading system, and the specific network topology architecture is as follows:
the power grid marketing management system is communicated with the power utilization acquisition terminal through the optical network data communication terminal through each wireless concentrator and each wireless gateway; or,
the power grid marketing management system adopts VPN special line to communicate with GPRS network through data acquisition management front end, and the GPRS network communicates with the power consumption acquisition terminal through each wireless gateway.
The invention mainly describes a regional power communication private network constructed by adopting a low-power wireless communication mode, and a micro-power wireless communication system is a low-speed, low-cost and low-power-consumption wireless data transmission network constructed by a wireless communication module. In an effort to provide a low-speed wireless communication technology of low complexity, cost and power for use with inexpensive fixed, portable or mobile devices. The technology is suitable for occasions with low data throughput, low network construction investment, high network safety requirements and inconvenience in frequent power supply replacement or charging. For example: home automation, industrial automation, power automation, environmental monitoring systems, and the like.
With the development of network technology, micropower wireless communication systems have developed a point-to-point communication mode into star network construction and mesh network construction; multipath transmission, etc.
The method for constructing the micropower wireless area coverage private power network communication system is characterized in that a proper micropower wireless communication platform is adopted as a communication physical layer, and a communication model suitable for the wireless private power network is constructed on the basis of the communication platform so as to meet the requirement of an area coverage communication technology in a certain area. The specific system framework structure is shown in fig. 1.
A micropower wireless communication system is used as a communication mode for distribution network automation, a private network based on micropower wireless area coverage is constructed in a distribution network automation area field, and the modes of optical fiber communication, wireless public network communication and medium-voltage carrier communication can be effectively supplemented in scheme cost, reliability and safety. The micropower wireless communication system in the system adopts two data conversion models of network data exchange and application data capture and sending, and can meet the compatibility and interconnection with various communication modes such as optical fiber, wireless, carrier wave and the like; and the micropower wireless in the system designs a mutual backup system based on network routing and a mutual backup mode based on an uplink interface, so that single-point or multi-point failure of the micropower wireless network can be resisted, and the reliability and the safety of the system are ensured to the greatest extent. In addition, in a medium-voltage distribution network system, the low-voltage power taking mode does not always disturb the development of a distribution network automation system, and the micro-power wireless communication system is adopted, and the low-power consumption and triggering awakening mode of the micro-power wireless system is combined, so that the system power consumption can be kept for a long time by adopting dry batteries for power supply.
Claims (2)
1. Be applied to smart power grids's little wireless private network system of electric power, its characterized in that, the deployment mode of system can fuse with optic fibre, carrier wave or GPRS mode, and specific system fuses the mode and is:
the distribution network automation DSCADA system is communicated with a GPRS network by a VPN special line through a data acquisition management front end, and the GPRS network is communicated with the power distribution network terminal through each wireless gateway; or,
the distribution network automation DSCADA system is communicated with the electricity utilization acquisition terminal through the optical network data communication terminal through each wireless concentrator and each wireless gateway; or,
the distribution network automation DSCADA system carries out data communication with the power distribution network terminal through the optical network data system through the main carrier communication machine, the auxiliary carrier communication machine and each wireless gateway.
2. The small power wireless private network system applied to the smart grid according to claim 1, wherein in the communication management platform of the low voltage centralized meter reading, the micropower wireless communication system combines with the existing optical fiber communication system to jointly establish an underlying network platform of the intelligent low voltage centralized meter reading system, and the specific network topology architecture is as follows:
the power grid marketing management system is communicated with the power utilization acquisition terminal through the optical network data communication terminal through each wireless concentrator and each wireless gateway; or,
the power grid marketing management system adopts VPN special line to communicate with GPRS network through data acquisition management front end, and the GPRS network communicates with the power consumption acquisition terminal through each wireless gateway.
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Cited By (4)
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| CN105071999A (en) * | 2015-07-06 | 2015-11-18 | 国网天津市电力公司 | Micropower wireless area-coverage power communication private network |
| CN105208565A (en) * | 2015-07-06 | 2015-12-30 | 国网天津市电力公司 | Physical layer framework for micro-power wireless area coverage electric power communication private network |
| CN106781396A (en) * | 2016-12-30 | 2017-05-31 | 杭州朗缤科技有限公司 | A kind of meter-reading module based on lora wireless sense networks |
| CN111917638A (en) * | 2020-07-09 | 2020-11-10 | 首钢京唐钢铁联合有限责任公司 | Electric power monitoring communication system |
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