CN102012693B - Distributed control system (DCS) of solar power station - Google Patents
Distributed control system (DCS) of solar power station Download PDFInfo
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- CN102012693B CN102012693B CN2009100921871A CN200910092187A CN102012693B CN 102012693 B CN102012693 B CN 102012693B CN 2009100921871 A CN2009100921871 A CN 2009100921871A CN 200910092187 A CN200910092187 A CN 200910092187A CN 102012693 B CN102012693 B CN 102012693B
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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
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The invention discloses a distributed control system (DCS) of a solar power station, which is named as the solar power station DCS in short. The solar power station DCS comprises a field control level, a centralized operation monitoring level and a comprehensive information supervisory level, wherein the field control level comprises a solar input system, a synchronization inverter system and a power output system; the centralized operation monitoring level comprises a data acquisition system, a data communication system, a data storage system, a data monitoring system, a large screen display, an engineer operation station and an operator operation station; and the comprehensive information supervisory level comprises a supervisory computer. The solar DCS can be used for controlling one or more solar power stations and adjusted according to actual situations, and has the advantages of reliable work, flexible configuration, convenience in maintenance and low price.
Description
Technical field
The invention belongs to solar power station, be specifically related to the method for designing of automation control system.
Background technology
The development of Along with computer technology, field bus technique, the network communications technology; And solar power station is to the real-time of control system, informationization, intellectuality, standardization, the open raising that requires, and requires that the solar-electricity station control system has that reliable operation, speed are fast, versatility, flexible configuration, characteristic such as easy to maintenance and cheap.
At present, after large-scale even huge solar power plant system set up, because system is made up of many unit solar cells plates, management and maintenance brought many inconvenience to managerial personnel, extremely bother when investigating fault.Can not investigate and prosecute the particular location of fault fast, also not have corresponding warning reminding device, thereby cause the life-span of total system to be reduced.On the basis that solves this difficult problem, researched and developed the solar power station Distributed Control System (DCS).
Summary of the invention
In order to solve solar power station is implemented robotization control, we have proposed the solar-electricity station control system.The solar power station Distributed Control System (DCS) is a kind of centralized management and scattered control system; Be that to have merged computer technology, field bus technique and the network communications technology be the advanced control system (ACS) of one, functions such as the management of system, control, data acquisition are dispersed in the various computing machine of system.
A kind of solar power station Distributed Control System (DCS) is made up of field control level, centralized operation supervision level and generalized information management level, and the field control level comprises: sun power input system, combining inverter system and electric power output system; Centralized operation is kept watch on level and is comprised: data acquisition system (DAS), data communication system, data-storage system, data monitoring system, data presentation system, active station; The generalized information management level comprises: managing computer system.
Further, described sun power input system comprises solar panel, tracker and header box, and the communication on each unit header box, the unit solar cells plate loop all has the address, and the relay in the header box is provided with sensor and is used for image data.
Further, described control signal is transmitted in total system through network.
Further, described computer installation administrative center concentrates on office or operation room.
Further, the data that described data acquisition system (DAS) collects to computing machine, and are showed what, solar power station whole system operation state of solar power plant generated energy through Network Transmission through real world devices.
Further; Header box in the described sun power input system is when sunshine is faint, through the series-parallel switching in the header box; Close the combining inverter of a part; The solar components number of series connection increases, and the voltage of unit block is raise, the input port ability operate as normal of inverter; And will arrive microprocessor through the data transmission that sensor acquisition arrives, on the display of computing machine, show.
Further, data presented is that the analysis and the control of process microprocessor obtains on computers, by collecting factor of environmental, controls the string and the number of solar components, and the number of inverter work also possesses the self-protection system simultaneously.
Further, SP is switched in the described header box, is specially: when one tunnel solar cell panel voltages during less than 0.25 * peak value WV Upm, four tunnel series connection in the header box, the one road always exports; When one tunnel solar cell panel voltages is (0.25-0.5) * peak value WV Upm, the two-way series connection, two-way is always exported; When one tunnel solar cell panel voltages is (0.5-1) * peak value WV Upm, do not connect four tunnel outputs.
Solar components square formation in the solar power station Distributed Control System (DCS) has all adopted solar automatic tracking system, and this system can improve the illumination utilization factor of solar power station 8%, remove itself beyond power consumption, can also increase by 3%.One-level in the control system automatic string shunting means that confluxes with secondary that confluxes improves 5% than the plant generator amount that does not adopt this system, because relay itself is a coil, and suitable little of power consumption.The result of statistics shows that the sun power Distributed Control System (DCS) can also improve the utilization factor in power station except the operate as normal in control power station, increased generated energy greatly.
Description of drawings
Fig. 1 solar power station Distributed Control System (DCS) theory diagram
Fig. 2 sun power input system theory diagram
The data read step that Fig. 3 one-level is confluxed and secondary confluxes
The controlled step that Fig. 4 one-level is confluxed and secondary confluxes
Fig. 5 solar energy tracking support
Fig. 6 tracker program run flow process
Fig. 7 header box relay principle of work circuit diagram
Embodiment
The solar power station Distributed Control System (DCS).See Fig. 1, it keeps watch on level by field control level, centralized operation and the generalized information management level constitutes.The field control level comprises: sun power input system 101, combining inverter system 102 and electric power output system 103; Centralized operation is kept watch on level and is comprised: data acquisition system (DAS) 104, data communication system 105, data-storage system 106, data monitoring system 111, large screen display 107, slip-stick artist's active station 108 and operator's active station 109; The generalized information management level comprises: supervisory computer 112.
Sun power input system 101 comprises solar panel or solar components square formation, tracker and the header box be made up of several solar panels; Controlling the input of whole solar power station; The solar components square formation absorbs sun power and converts electric energy into; These electric energy are direct currents; Need to be transferred to combining inverter system 102 through the sun power input system, handle the back with regard to the output AC electricity through the inversion of combining inverter system 102, these alternating currents are being transferred to electrical network 115 or are being transferred to load 116 through electric power output system 103.When a solar power station can give electrical network 115 power supplies; Again can be when electrical network 116 to have been bought electricity, this solar power station be the opposite tide system just, can not give electrical network 115 when a solar power station and supply power; And can only be when electrical network 116 has been bought electricity, this solar power station just is a non-opposite tide system; The data of sun power input system 101, combining inverter system 102 and electric power output system 103 are transferred to large screen display 107, slip-stick artist's active station 108 and operator's active station 109 through data communication system 105, data-storage system 106 and data monitoring system 111; And slip-stick artist's active station 108 is made Based Intelligent Control according to the data of receiving to solar power station with operator's active station 109; Supervisory computer 112 can be controlled all systems in whole power station, and it is the brain of solar power station Distributed Control System (DCS).
In addition, the solar power station Distributed Control System (DCS) can be given remote monitoring computing machine 113 and other LANs 114 information transmission in power station through gateway 110.
Specify the present invention below in conjunction with Fig. 1, Fig. 2, Fig. 3 and Fig. 4; Among the present invention; The data acquisition that can on market, buy and communication module all are installed on each unit solar cells plate; Each unit solar cells plate is linked to each other with computing machine, and the communication module on each unit solar cells plate has absolute address, makes the unit solar cells plate corresponding with the concrete data item in the computer software; So that to the inquiry and the maintenance of the system failure, the major function of data acquisition and communication module is to gather the output voltage of solar panels.
The direct current of solar components square formation 201 through one-level conflux 202, secondary conflux 203 and DC power distribution cabinet 204 be transferred to combining inverter system 102.Behind the solar components square formation series and parallel, conflux through one-level and 202 to carry out direct current and conflux, carry out secondary again and conflux 203.Current information is gathered at secondary 203 places of confluxing.And current information fed back to DC power distribution cabinet 204.DC power distribution cabinet 204 is received conflux 203 current information of secondary, carries out inside parallel connection, series connection adjustment.Like rainy day or morning, at dusk; The electric current of solar components square formation is very little; Then secondary is confluxed 203 outputs through adjustment parallelly connected, series connection, close the combining inverter of a part, the solar components number of series connection is increased; To improve electric current output, reach combining inverter system 102 WVs.
The data read step that one-level is confluxed and secondary confluxes is as shown in Figure 3: beginning 301, and the system of confluxing energising is started working; Start inquiry microprocessor 302 then, inquiry microprocessor 302 begins to detect the data of solar components square formation, and whether judgment data is normal 303, if data are undesired, returns inquiry microprocessor 302.If data are normal, data-switching is arrived communication port address 304; Send normal signal then to processor 305, return inquiry microprocessor 302 at last, continue the duty of inquiry and detection system.
The controlled step that one-level is confluxed and secondary confluxes is as shown in Figure 4: microprocessor is waited for the order 401 of microcomputer, and microprocessor reads the order 402 of microcomputer, and whether the microprocessor judges data switch 403; If judged result, is returned the order 401 that microprocessor is waited for microcomputer for not switching, if judged result is for switching; Then carry out voltage ratio and go to drive relay work 404; Continue query note data 405 then, patrol and examine end after, return step 401.
As shown in Figure 7, gather environmental data through microprocessor, and analyze the scope of data, for voltage comparator provides corresponding signal, come the position of transfer relay.Concrete switching mode is following in the present embodiment: adopt and often open for 18 normally closed 8 and 14 normally closed and 4 normally opened relays, must insert the first via earlier during installation, relay is adjusted the normally opened contact and the normally closed contact of relay according to voltage:
Fig. 5 and shown in Figure 6, tracker are arranged on the support of solar panel, comprising: be arranged on the stepper motor 501 on the base, be arranged on the stepper motor 502 above the support, photovoltaic cell 503, support 504, turret 505, main shaft 506 and base 507.Its concrete structure is seen Fig. 5.Stepper motor 1 is fixed on the base; Main shaft and spring bearing thereof are installed in above the base; Main shaft can rotate with respect to base, and turret and support are fixedly mounted on the main shaft, 502 rack-mount of photovoltaic cell 503, stepper motors; Photovoltaic cell can rotate with respect to support, and the output shaft of stepper motor 502 is connected on the photovoltaic cell.
When light squints; Control section sends control signal drive stepping motor 501 and drives turret 505 and be fixed on main shaft 506, support 504 and photovoltaic cell 503 rotations on the turret; Control signal drive stepping motor 502 drives the relative and support rotation of photovoltaic cell simultaneously; Co-operation through stepper motor 501, stepper motor 502 realizes the tracking to solar azimuth and elevation angle; Solar bracket can be changed according to the position of the sun is different in real time, vertical with sun direction of light all the time.
Claims (6)
1. a solar power station Distributed Control System (DCS) is made up of field control level, centralized operation supervision level and generalized information management level, and the field control level comprises: sun power input system, combining inverter system and electric power output system; Centralized operation is kept watch on level and is comprised: data acquisition system (DAS), data communication system, data-storage system, data monitoring system, data presentation system, active station; The generalized information management level comprises: managing computer system; Said sun power input system comprises solar panel, tracker and header box, and the communication on each header box, the solar panel loop all has the address, and the relay in the header box is provided with sensor and is used for image data; Header box in the described sun power input system is when sunshine is faint, through the series-parallel switching in the header box; Close the combining inverter of a part; The solar components number of series connection increases, and the voltage of unit block is raise, the input port ability operate as normal of inverter; And will arrive microprocessor through the data transmission that sensor acquisition arrives, on the display of computing machine, show.
2. solar power station Distributed Control System (DCS) according to claim 1, it is characterized by: control signal is transmitted in total system through network.
3. solar power station Distributed Control System (DCS) according to claim 1 is characterized by: the computer installation administrative center that is provided with said managing computer system concentrates on office or operation room.
4. solar power station Distributed Control System (DCS) according to claim 1; It is characterized by: the data that said data acquisition system (DAS) collects; To computing machine, and show what, solar power station whole system operation state of solar power station generated energy through display device through Network Transmission.
5. solar power station Distributed Control System (DCS) according to claim 1; It is characterized by: data presented on computers; The analysis and the control that are the process microprocessor obtain, by collecting factor of environmental, the string and the number of control solar components; The number of inverter work also possesses the self-protection system simultaneously.
6. solar power station Distributed Control System (DCS) according to claim 1; It is characterized by: SP is switched in the described header box; Be specially: when one tunnel solar cell panel voltages during less than 0.25 * peak value WV Upm, four tunnel series connection in the header box, the one road always exports; When one tunnel solar cell panel voltages is (0.25-0.5) * peak value WV Upm, the two-way series connection, two-way is always exported; When one tunnel solar cell panel voltages is (0.5-1) * peak value WV Upm, do not connect four tunnel outputs.
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| CN2009100921871A CN102012693B (en) | 2009-09-04 | 2009-09-04 | Distributed control system (DCS) of solar power station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102780268A (en) * | 2012-08-08 | 2012-11-14 | 中盛光电能源股份有限公司 | Large-scale distributed photovoltaic plant unit real-time remote intelligent operation control system |
| WO2014086121A1 (en) * | 2012-12-07 | 2014-06-12 | Gao Peng | Solar energy offline application system |
| CN107895994A (en) * | 2017-12-11 | 2018-04-10 | 湖北万润新能源科技发展有限公司 | Solar power system |
| CN108536178A (en) * | 2018-04-27 | 2018-09-14 | 南通欧贝黎新能源电力股份有限公司 | Wisdom solar cell electric power station system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101251561A (en) * | 2008-04-01 | 2008-08-27 | 济南新吉纳远程测控有限公司 | Monitoring system and monitoring method for solar energy power generation system |
| CN101291069A (en) * | 2008-05-30 | 2008-10-22 | 广东志成冠军集团有限公司 | A photovoltaic grid-connected power generation system capable of online expansion |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101251561A (en) * | 2008-04-01 | 2008-08-27 | 济南新吉纳远程测控有限公司 | Monitoring system and monitoring method for solar energy power generation system |
| CN101291069A (en) * | 2008-05-30 | 2008-10-22 | 广东志成冠军集团有限公司 | A photovoltaic grid-connected power generation system capable of online expansion |
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