CN104009544A - Photovoltaic power generation remote control and communication system and method - Google Patents
Photovoltaic power generation remote control and communication system and method Download PDFInfo
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- CN104009544A CN104009544A CN201410195450.0A CN201410195450A CN104009544A CN 104009544 A CN104009544 A CN 104009544A CN 201410195450 A CN201410195450 A CN 201410195450A CN 104009544 A CN104009544 A CN 104009544A
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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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 relates to a photovoltaic power generation remote control and communication system and method. The communication system comprises a collector, a communication module, a centralized control center and a data interaction module. A collecting module is connected with corresponding photovoltaic devices in a power station, a DSP chip is used for performing processing in the collecting module, and an SIM chip is arranged in the collecting module. The collector is communicated with the centralized control center through the communication module, and the centralized control center is connected with an outer client side through the data interaction module. The centralized control center analyzes the received data and transmits the analyzed data to a real-time database, the client side has access to the database, the data are processed, stored and displayed based on the B/S and C/S technology, a control signal is issued while the state of production equipment of the photovoltaic power station is monitored, and remote control is achieved. Wireless flow can be saved to a great extent and wireless communication cost can be reduced by means of the active uploading data transmission method adopted under the ordinary situation and the requesting-responding type data transmission method adopted under the specific situation.
Description
Technical field
The system and method that the present invention relates to a kind of photovoltaic generation Long-distance Control and communication, belongs to field of photovoltaic power generation.
Background technology
Current Chinese solar energy power generating industry development is swift and violent, the subordinate of Sunpower Corp. power station numerous and distribute comparatively disperse, information gathering point is many, adds the Rapid Expansion of beginning a project, on-site maintenance is undermanned, management work difficulty increase.Sunpower Corp. wants to understand the concrete production status in each power station and can only realize by photovoltaic generation remote control administrative system.Communication be well ensure supervisory control system upload assign, the key link of efficient quick, communication network system determines the topological structure of supervisory control system to a great extent.
At present, photovoltaic power station monitoring system is realized and is mainly divided into wired and wireless two kinds of modes from communication modes.Wired monitoring carries out transfer of data by entity circuit, and which exists many deficiencies, as high in cost, difficult in maintenance, means of communication is single, network management is backward, is difficult to carry ever-increasing business demand.Therefore current mainstream development trend is to adopt GPRS radio mobile communication technology, carries out communication by the relay transmission technology of microwave station or artificial satellite.
The existing means of communication that are applicable to solar energy remote centralized control management system, mainly based on traditional MODBUS-TCP agreement, adopt GPRS communication to carry out transfer of data.The communication system of Modbus TCP/IP comprises dissimilar equipment, as is connected to Modbus TCP/IP client-server equipment and the interconnect equipment etc. of TCP/IP network.This communication means adopts " main website-slave station " pattern, in the time that data are transmitted, initiatively slave station is sent to request, and slave station responds main website.In photovoltaic remote monitoring communication system, the each photovoltaic plant of subordinate is slave station, and remote data center is main website, and data center sends request of data to photovoltaic plant, and photovoltaic plant carries out data upload to request response.
Wireless GPRS utilizes communication signal frequency range special on mobile communication base station to transmit, communication fee is to calculate with the data volume of its transmission, the shortcoming of existing communication protocol is the waste that the data transfer mode of request-response type has caused GPRS wireless flow, has increased the cost of transfer of data.Especially, when photovoltaic generation scale is large, when subordinate's photovoltaic plant One's name is legion, the wireless flow expense of every month is all a no small spending.
Summary of the invention
The invention discloses a kind of means of communication that are applicable to photovoltaic remote control administrative system, improve MODBUS-TCP agreement, a kind of new stipulations that are applicable to photovoltaic remote monitoring are formulated, adopt the mode of data active upload to save GPRS wireless flow, improve data transmission efficiency, realize preferably photovoltaic plant creation data real-time Transmission, return under the operating mode of control at needs simultaneously, communications protocol allows to realize the passback of control command to descending photovoltaic plant, has finally realized photovoltaic plant remote monitoring and administration.
The invention discloses a kind of means of communication that are applicable to photovoltaic remote control administrative system, the MODBUS-TCP agreement of these means of communication based on traditional, under common situation, adopt the mode of GPRS data active upload to carry out transfer of data, while the photovoltaic plant of monitoring being returned to control under particular case, adopt request-response type communication mode to carry out transfer of data.Communication system comprises acquisition module, communication module, service module and data interaction module.In the present invention, between collector and centralized control center, adopt GPRS wireless data active upload mode to carry out communication, centralized control center is inner adopts mobile private-line mode to carry out communication while receiving data, under by GPRS wireless mode, long-range time control carried out in power station while beaming back control signal.
Wherein, acquisition module is connected with each photovoltaic apparatus corresponding in power station, place, uses dsp chip to process in acquisition module, includes SIM chip.In communication module, comprise GPRS wireless network and Internet network.In centralized control center, will after the Data Analysis receiving, import in real-time data base, the technology that client-access database combines by B/S and C/S is processed, stores and show data, when photovoltaic plant production equipment state is monitored, issue control signal, realize Long-distance Control.
The beneficial effect that technical solution of the present invention is brought:
1, the means of communication of the present invention, adopt GPRS wireless communication technique, can realize the photovoltaic power generation equipment of the multiple distributed locations of the online long-distance monitor and control of control centre, realize team control function.
2, the means of communication of the present invention, do not affect timing verification order and return control order descending in, adopt the communication modes of active upload data by GPRS wireless network, saved flow, reduced operating cost.
3, in communications protocol, in the frame structure of uploading data, be provided with dynamic check password, ensured fail safe and the confidentiality of data.
Brief description of the drawings
By describing in more detail exemplary embodiment of the present invention with reference to accompanying drawing, above and other aspect of the present invention and advantage will become more and be readily clear of, in the accompanying drawings:
Fig. 1 is the systematic schematic diagram of a kind of photovoltaic generation Long-distance Control of the present invention and communication;
Fig. 2 is the flow chart of the communication protocol that adopts of the present invention;
Fig. 3 is power station image data structure chart;
Fig. 4 is the workflow diagram of DSP;
The Principle of Communication figure of Fig. 5 photovoltaic plant and centralized control center;
Fig. 6 is the control center topology diagram of a kind of photovoltaic generation Long-distance Control of the present invention and communication.
Embodiment
Hereinafter, now with reference to accompanying drawing, the present invention is described more fully, various embodiment shown in the drawings.But the present invention can implement in many different forms, and should not be interpreted as being confined to embodiment set forth herein.On the contrary, it will be thorough with completely providing these embodiment to make the disclosure, and scope of the present invention is conveyed to those skilled in the art fully.
Hereinafter, exemplary embodiment of the present invention is described with reference to the accompanying drawings in more detail.
With reference to accompanying drawing 1, operation principle of the present invention is: collector gathers the parameter of each equipment of photovoltaic plant and surrounding enviroment, after data are processed, utilizes SIM card that the packet of encapsulation is passed through to GPRS wireless mode active upload to centralized control center.Centralized control center utilizes INTERNET to receive after packet, packet is resolved, data after resolving are deposited in edna real-time data base, client is by the historical data in visit data library call real-time data base, to data analysis and displaying, photovoltaic plant transmitting order to lower levels is returned to when control, and data center sends control command, and subordinate power station SIM card receives after signal and responds and operate and return feedback content according to command content.Under this common situation, adopt the data transfer mode of active upload, under particular case, adopt the method for request-response type transfer of data, can save to a great extent wireless flow, reduce the cost of wireless telecommunications aspect.
Utilize the means of communication of the present invention, the data length of uploading frame one frame is 251 bytes, within one hour, is 15060 bytes, 30 seconds frames of heartbeat frame, frame 10 bytes, one minute 20 byte, one hour 120 byte, 15180 byte/1024=15kb.15*24 is the byte 360kb of a day, passes down 14 bytes of a frame, one hour frame, and one day 14*24=336kb, adds that the number of times calculating that disconnection links again can not exceed 2kb for one day, be 62kb January.A statistics day calculated flow rate is 360+62=422kb (calculating by 24 hours) thus, and a month flow is only 12.37Mb.
As shown in Figure 2, the communication protocol that the present invention adopts allows to carry out information exchange and data transmission between acquisition station and dsp system.This agreement is sent mode on adopting initiatively, and DSP station number can not repeat, by sending switching value and analog quantity in DSP timing initiatively; Return prosecutor face, sent and control message with the form of note by acquisition station to DSP, DSP carries out, and returns to execution result by uploading TCP link.
Dsp system completes data acquisition, Data Analysis, the data sending function to each photovoltaic apparatus.Between DSP and photovoltaic apparatus, be connected all-transparent design by RJ45 netting twine.After completing, Data Analysis is sent to data center based on Modbus-TCP agreement via GPRS network by SIM; transfer of data adopts active upload mode; SIM per minute sends a packet from trend data center; save to a certain extent data traffic; in the time that network communication is not smooth or data center is not online; DSP deposits data in buffer memory in; in the time that network recovery is normal or data center is normal online; DSP sends the historical data of buffer memory automatically according to time sequencing, send in real time until normal.The structure chart of power station image data as shown in Figure 3.
As shown in Figure 4, be the workflow diagram of DSP.
DSP is in the time of open state, and when data center can connect when upper, DSP is uploaded to data center by SIM by the information collecting; In the time that network disconnects, DSP obtains, after feedback that network disconnects, the data that collect being deposited in buffer memory, when obtaining after the feedback of network successful connection, by the data forward in buffer memory to data center, until normal real-time working.
The Principle of Communication figure of photovoltaic plant and centralized control center as shown in Figure 5.
Control centre is the core of whole system, is responsible for receiving the device data from GPRS, and the request of simultaneously monitoring online client, as shown in Figure 6, is the system block diagram of Data Control Center, mainly comprises following service:
1. data acquisition service.This service is responsible for monitoring a port, the photovoltaic apparatus data retransmission that GPRS network is uploaded DSP is so far on port, after having data received, data are resolved, utilize interface routine that the data after resolving are deposited in edna database, online monitor client can be from database reading out data.
2. monitoring and time control command service.The responsible processing of this service monitor client sends to the order of data service system, system determines whether device data to upload by judging that whether control centre is online, whether network is unimpeded, simultaneously according to actual production situation, also need the control command that monitor client is sent to be issued to photovoltaic apparatus, reach with this object that control appliance moves.
3. statistics and inquiry service.This service is responsible for monitoring the inquiry request of client for database data, by this service, allows the access of client to database.By the data in client-access edna database, by the ruuning situation real-time exhibition of the each photovoltaic plant of subordinate out.
Stability during for the operation of guarantee native system, system core equipment adopts the mode of two-node cluster hot backup, and disk adopts Raid pattern.
Main database server two power PC servers of employing and a disk array are combined into Windows Cluster and troop, and improve database operation stability, and it is fault-tolerant that all memory devices all adopt Raid pattern simultaneously, ensure hard disk stable and safe in operation.
In view of data acquisition and storage demand high, data acquisition server adopts power PC server instead of traditional industrial computer, has taken into account high-performance, high stability, the high disaster tolerance sexual demand of equipment.
Because each photovoltaic plant (school) distributes extensively, therefore in data acquisition link, using carrier network is relatively reliable and the comparatively cheap mode of cost.For ensureing the maximum security of transfer of data, system has adopted the 20M of China Mobile business data private line service, has taken into account stability and the confidentiality of transmission simultaneously.
Because data are to transmit by Internet public network, in theory, just there is the possibility of contamination in data communication, simultaneity factor and public network interconnect at physical layer, so in theory also there is the possibility of suffering network attack in system, so on the network boundary of system, disposed successively high-performance physics fire compartment wall and professional physics PAA, farthest ensured the network security of system Intranet.
Because system is divided into, B/S issues side and C/S issues side, wherein B/S issue side only has function for monitoring to the each photovoltaic plant of bottom, and C/S issue side also has control function to the each photovoltaic plant of bottom, so the safety zone that data are different is answered in the inside and outside both sides of system, specify according to electric power system correlative protection, in system, outside has adopted the unidirectional spacer assembly of physics to carry out the Network Isolation of physical layer, ensures that C/S issues being perfectly safe of side data and system.
Core network adopts three layers of modular switch of two high-performance enterprise-levels, and configuration preference level is seized hot standby pattern, and two-shipper is on-line operation simultaneously, and a master one is standby, Millisecond failover.Configured port prioritised transmission pattern, ensures that Internet resources make full use of simultaneously.
Stability during for the operation of guarantee native system, system core equipment adopts the mode of two-node cluster hot backup, and disk adopts Raid pattern.
Main database server two power PC servers of employing and a disk array are combined into Windows Cluster and troop, and improve database operation stability, and it is fault-tolerant that all memory devices all adopt Raid pattern simultaneously, ensure hard disk stable and safe in operation.
In view of data acquisition and storage demand high, data acquisition server adopts power PC server instead of traditional industrial computer, has taken into account high-performance, high stability, the high disaster tolerance sexual demand of equipment.
The foregoing is only embodiments of the invention, be not limited to the present invention.The present invention can have various suitable changes and variation.All any amendments of doing within the spirit and principles in the present invention, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in.
Claims (3)
1. a system for photovoltaic generation Long-distance Control and communication, is characterized in that:
Described communication system comprises collector, communication module, centralized control center and data interaction module; Wherein, acquisition module is connected with each photovoltaic apparatus corresponding in power station, place, uses dsp chip to process in acquisition module, includes SIM chip; Collector communicates by communication module and centralized control center; Centralized control center connects external client by data interaction module.
2. the system of a kind of photovoltaic generation Long-distance Control as claimed in claim 1 and communication, is characterized in that:
In described communication module, comprise GPRS wireless network and Internet network.
3. right to use requires the method that the system described in 1 or 2 is carried out photovoltaic generation Long-distance Control and communication, it is characterized in that:
Collector gathers the parameter of each equipment of photovoltaic plant and surrounding enviroment, after data are processed, utilizes SIM card that the packet of encapsulation is passed through to GPRS wireless mode active upload to centralized control center; Centralized control center utilizes INTERNET to receive after packet, packet is resolved, data after resolving are deposited in real-time data base, client is by the historical data in visit data library call real-time data base, to data analysis and displaying, photovoltaic plant transmitting order to lower levels is returned to when control, and data center sends control command, and subordinate power station SIM card receives after signal and responds and operate and return feedback content according to command content.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104615094A (en) * | 2014-11-24 | 2015-05-13 | 国网辽宁省电力有限公司锦州供电公司 | City-class high-density multipoint distributed photovoltaic cluster monitoring method |
| CN104704702A (en) * | 2015-01-29 | 2015-06-10 | 湖北民族学院 | Photovoltaic power generation system and fault detection method therefor |
| CN106849349A (en) * | 2016-12-13 | 2017-06-13 | 航天东方红卫星有限公司 | A kind of sun square formation simulator developing Of Remote Control Power frame system |
| CN107995250A (en) * | 2016-10-26 | 2018-05-04 | 成都长城开发科技有限公司 | Automatic meter reading system and method |
| CN111049264A (en) * | 2019-12-02 | 2020-04-21 | 苏州协鑫新能源运营科技有限公司 | Energy management system based on cloud platform |
| CN113110185A (en) * | 2021-04-19 | 2021-07-13 | 深圳市车百路科技有限公司 | Intelligent monitoring equipment system for new energy operation and maintenance management |
| CN114697323A (en) * | 2022-03-03 | 2022-07-01 | 固德威技术股份有限公司 | Intelligent management system, photovoltaic digital energy system and communication management method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104615094A (en) * | 2014-11-24 | 2015-05-13 | 国网辽宁省电力有限公司锦州供电公司 | City-class high-density multipoint distributed photovoltaic cluster monitoring method |
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| CN107995250A (en) * | 2016-10-26 | 2018-05-04 | 成都长城开发科技有限公司 | Automatic meter reading system and method |
| CN106849349A (en) * | 2016-12-13 | 2017-06-13 | 航天东方红卫星有限公司 | A kind of sun square formation simulator developing Of Remote Control Power frame system |
| CN111049264A (en) * | 2019-12-02 | 2020-04-21 | 苏州协鑫新能源运营科技有限公司 | Energy management system based on cloud platform |
| CN113110185A (en) * | 2021-04-19 | 2021-07-13 | 深圳市车百路科技有限公司 | Intelligent monitoring equipment system for new energy operation and maintenance management |
| CN114697323A (en) * | 2022-03-03 | 2022-07-01 | 固德威技术股份有限公司 | Intelligent management system, photovoltaic digital energy system and communication management method |
| CN114697323B (en) * | 2022-03-03 | 2024-04-16 | 固德威技术股份有限公司 | Intelligent management system, photovoltaic digital energy system and communication management method |
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