CN205017270U - Monitoring system for photovoltaic power plant operation conditions - Google Patents
Monitoring system for photovoltaic power plant operation conditions Download PDFInfo
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- CN205017270U CN205017270U CN201520628104.7U CN201520628104U CN205017270U CN 205017270 U CN205017270 U CN 205017270U CN 201520628104 U CN201520628104 U CN 201520628104U CN 205017270 U CN205017270 U CN 205017270U
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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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Abstract
The utility model discloses a monitoring system for photovoltaic power plant operation conditions, organize cluster, bus bar including a plurality of photovoltaics, still include signal generating device, signal processing device, photovoltaic group cluster is established ties by a plurality of subassemblies and is constituteed, the signal processing device includes manyly to the port, whenever includes S+, S - to the port, and every photovoltaic group polyphone connects between S+, S -, and a plurality of photovoltaics group cluster connects in parallel respectively many on to the port, and every photovoltaic group cluster is connected with female stream that converges behind signal processing device, the signal generating device connect in parallel on the subassembly, signal generating device is used for gathering subassembly voltage, subassembly electric capacity, subassembly temperature, sends the device for signal processing through the disturbance electric current, photovoltaic group crosstalk stream is gathered to the signal processing device, separates code signal generating device signal, and the subassembly electric current that gathers, subassembly voltage, subassembly electric capacity, subassembly temperature are sent for the host computer. The utility model discloses it is with low costs, longe -lived, need not not change photovoltaic power plant topological structure.
Description
Technical field
The utility model relates to a kind of supervisory control system of photovoltaic plant operation conditions, belongs to photovoltaic module monitoring technique field.
Background technology
Photovoltaic generation is a kind of technology utilizing the photovoltaic effect of interface and luminous energy is directly changed into electric energy.The key element of this technology is solar cell.Solar cell carries out packaging protection after series connection can form large-area photovoltaic module, then coordinates the parts such as upper power controller just to define photovoltaic power generation apparatus.The operating state of photovoltaic module and degree of aging have influence on operation conditions and the generating efficiency of whole photovoltaic power generation apparatus, carry out monitoring in real time seem particularly important to photovoltaic module running status.
In existing application, mostly can only monitor whole group of string, the parameter of single component cannot be obtained; Supervisory control system complex structure, needs Usage data collection unit, DC-DC converter, 2G or 3G communication module, PLC communication module etc., causes supervisory control system cost up, and useful life reduces, and further increases construction and the O&M cost of whole photovoltaic plant.
Utility model content
Object: in order to overcome the deficiencies in the prior art, the utility model provides a kind of supervisory control system of photovoltaic plant operation conditions.
Technical scheme: for solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A supervisory control system for photovoltaic plant operation conditions, comprises multiple photovoltaic group string, bus rod, also comprises signal generation apparatus, signal processing apparatus, and described photovoltaic group string is composed in series by multiple assembly; Signal processing apparatus comprises multipair port, and often pair of port comprises S+, S-, and each photovoltaic group series winding is connected between S+, S-, and multiple photovoltaic group string is connected in parallel on multipair port respectively, and each photovoltaic group string is connected with female stream that confluxes through signal processing device postpone; Described signal generation apparatus is connected in parallel on assembly; Described signal generation apparatus sends to signal processing apparatus for acquisition component voltage, assembly electric capacity, assembly temperature by current perturbation; Described signal processing apparatus is used for by decoding photovoltaic group crosstalk stream, gathers assembly electric current, component voltage, assembly electric capacity, assembly temperature send to host computer.
Described signal generation apparatus comprises signal detection module, signal generating module, voltage acquisition module, electric capacity acquisition module, temperature collect module, single-chip microcomputer, described signal detection module comprises capacitance, bandpass filtering modules block, voltage comparison module, signal contrast module, and described signal generating module comprises DC constant current power supply, switching tube, fundamental frequency generation module, duty cycle control module; Described capacitance, bandpass filtering modules block, voltage comparison module, signal contrast module are connected successively, and described single-chip microcomputer is connected with signal contrast module, and single-chip microcomputer is used for current perturbation in reception, transmission photovoltaic group string and there is situation; Described DC constant current power supply, switching tube, duty cycle control module, fundamental frequency generation module are connected, described duty cycle control module is connected with switching tube, described switching tube is used for control signal generation module and produces current perturbation, described duty cycle control module is connected with single-chip microcomputer, fundamental frequency generation module, realizes coding for changing fundamental frequency carrier duty cycle according to collection signal; Described voltage acquisition module, electric capacity acquisition module, temperature collect module are all connected with single-chip microcomputer, and voltage, electric capacity, temperature signal are encoded by described single-chip microcomputer.
Described signal processing apparatus comprises many group current acquisition modules, many group signal decoding modules, multi-group resistance filtration module, single-chip microcomputer, 485 buses, described photovoltaic group string of often organizing all accesses bus rod with current acquisition module, signal decoding module, bandreject filtering module after being in series, described often group current acquisition module, signal decoding module are all connected with single-chip microcomputer, and described single-chip microcomputer often organizes voltage, electric capacity, the temperature signal of photovoltaic group crosstalk stream and assembly for gathering; Described single-chip microcomputer is also connected with 485 buses.
Beneficial effect: the supervisory control system of a kind of photovoltaic plant operation conditions that the utility model provides, realize the monitoring to all component voltage, electric current, temperature, capacitance parameter by signal generation apparatus, signal processing apparatus, reach the object of component level monitoring and ageing state assessment.Adopt simple square wave carrier and duty cycle square wave modulation system, realize the signal communication function based on photovoltaic group crosstalk cable, the current disturbing applied transmits in the communication media of photovoltaic group crosstalk cable, effectively utilize photovoltaic plant field resources, reach circuit structure simple and reliable, the object of mass communication chip need not be used.Antijamming capability is strong, and the component parameter collected carries out digital code transmission, and transmitting procedure is confined within single photovoltaic group string, decreases the possibility by external interference.Power station generating efficiency loss is little, and scheme does not use communication, significantly reduces the energy consumption in communication process, does not directly measure the current parameters of single component, reduces the power loss introduced because measuring electric current.The design's cost is low, and the life-span is long, need not change photovoltaic plant topological structure.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of signal generation apparatus;
Fig. 3 is the structural representation of signal detection module;
Fig. 4 is the structural representation of signal generating module;
Fig. 5 is the structural representation of signal processing apparatus.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, a kind of supervisory control system of photovoltaic plant operation conditions, comprises multiple photovoltaic group string 1, bus rod 2, also comprises signal generation apparatus 3, signal processing apparatus 4, and described photovoltaic group string 1 is composed in series by multiple assembly 11; Signal processing apparatus 3 comprises multipair port, often pair of port comprises S+, S-, each photovoltaic group string 1 is connected between S+, S-, and multiple photovoltaic group string 1 is connected in parallel on multipair port respectively, and each photovoltaic group string 1 flows 2 with mother of confluxing and is connected after signal processing apparatus 3; Described signal generation apparatus 4 is connected in parallel on assembly 11; Described signal generation apparatus 3 sends to signal processing apparatus for acquisition component voltage, assembly electric capacity, assembly temperature by current perturbation; Described signal processing apparatus 4 for by decoding photovoltaic group crosstalk stream, gathers assembly electric current, component voltage, assembly electric capacity, assembly temperature sends to host computer.
As shown in Figure 2, described signal generation apparatus 3 comprises signal detection module 31, signal generating module 32, voltage acquisition module 33, electric capacity acquisition module 34, temperature collect module 35, single-chip microcomputer 36, and described signal detection module 31, signal generating module 32, voltage acquisition module 33, electric capacity acquisition module 34, temperature collect module 35 are all connected with single-chip microcomputer 36; As shown in Figure 3, described signal detection module 31 comprises capacitance 311, bandpass filtering modules block 312, voltage comparison module 313, signal contrast module 314, as shown in Figure 4, described signal generating module 32 comprises DC constant current power supply 321, switching tube 322, fundamental frequency generation module 323, duty cycle control module 324; Described capacitance 311, bandpass filtering modules block 312, voltage comparison module 313, signal contrast module 314 are connected successively, described single-chip microcomputer 36 is connected with signal contrast module 314, and single-chip microcomputer 36 exists situation for receiving, sending current perturbation in photovoltaic group string; Described DC constant current power supply 312, switching tube 322, duty cycle control module 324, fundamental frequency generation module 323 are connected, described duty cycle control module 324 is connected with switching tube 322, the current perturbation that described switching tube 322 produces for switching signal generation module 32, described duty cycle control module 324 is connected with single-chip microcomputer 36, fundamental frequency generation module 323, realizes coding for changing fundamental frequency carrier duty cycle according to collection signal; Described voltage acquisition module 33, electric capacity acquisition module 34, temperature collect module 35 are all connected with single-chip microcomputer 36, and voltage, electric capacity, temperature signal are encoded by described single-chip microcomputer 36.
As shown in Figure 5, described signal processing apparatus 4 comprises many group current acquisition modules 41, many group signal decoding modules 42, multi-group resistance filtration module 43, single-chip microcomputer 44,485 bus 45, described photovoltaic group string 1 of often organizing all accesses bus rod 2 with current acquisition module 41, signal decoding module 42, bandreject filtering module 43 after being in series, described often group current acquisition module 41, signal decoding module 42 are all connected with single-chip microcomputer 44, and described single-chip microcomputer 44 often organizes voltage, electric capacity, the temperature signal of photovoltaic group crosstalk stream and assembly for gathering; Described single-chip microcomputer 44 is also connected with 485 buses 45.
Concrete occupation mode is as follows: during enforcement, and each photovoltaic group series winding is connected between port S+, S-, and multiple photovoltaic group string is connected in parallel on the multipair port of signal processing apparatus respectively, and each photovoltaic group string is connected with female stream that confluxes through signal processing device postpone; Signal generation apparatus is connected in parallel on assembly.
During signal generation apparatus monitor component, voltage acquisition module, electric capacity acquisition module, temperature collect module, by after the information measurement of the voltage of assembly, electric capacity, temperature, send to single-chip microcomputer.Single-chip microcomputer is encoded to metrical information, and send to duty cycle control module, fundamental frequency generation module produces the carrier signal of square-wave signal as transmission of information of fixed frequency, the duty ratio that duty cycle control module changes carrier signal according to information coding generates current disturbing, realizes the transmission of information.
Due to, all signal generation apparatus in parallel in same photovoltaic group string, use identical fundamental frequency generation module, therefore when two signal generation apparatus apply current disturbing to photovoltaic group string simultaneously, can interfere with each other.Therefore, signal detection module will detect in current photovoltaic group string whether have other signal generation apparatus just at transmission signal, and single-chip microcomputer realizes the collision detection mechanism of information transmission by signal detection module.
When the electric current flow through in assembly exists the disturbance representing signal of communication, this current disturbing can cause assembly both end voltage generation respective change, and this is changed to voltage disturbance, and be a square-wave signal, frequency is identical with carrier signal.Voltage disturbance is superimposed upon on assembly output voltage, during detection, through capacitance isolated DC output voltage, need only pass through the disturbance voltage of high frequency.Disturbance voltage, again through bandpass filtering modules block, only retains the Frequency point of carrier signal.Because voltage disturbance frequency is identical with carrier frequency, only has efficient communication signal by bandpass filtering modules block.Filtered voltage signal average is 0, is again converted to square-wave signal through voltage comparison module.Signal contrast module judges whether the square-wave signal that voltage comparison module exports is efficient coding signal, as for having other signal generation apparatus just at transmission signal in efficient coding signal then photovoltaic group string, as in invalid code signal then photovoltaic group string without other signal generation apparatus just at transmission signal, and judged result is notified single-chip microcomputer.
When there being other signal generation apparatus just at transmission signal, switching tube disconnects, and signal generating module in parallel on this assembly does not work.When without other signal generation apparatus just at transmission signal time, switching tube conducting, assembly output current a part by DC constant current power supply and switching tube, no longer lead to next stage assembly.Because each assembly is in series in photovoltaic group string, when one of them assembly output current reduces, the electric current of whole photovoltaic group string will reduce simultaneously.Therefore other signal generation apparatus in parallel in photovoltaic group string, and signal processing apparatus all will detect that in cable, electric current changes.This electric current is under the control of switching tube, and according to the square wave frequency change of fundamental frequency generation module setting, and the duty ratio of square wave represents each parameter information according to the code signal that duty cycle control module provides.
Signal processing apparatus processes the information of photovoltaic group string simultaneously, and signal processing apparatus, by the current parameters of current acquisition module acquires each photovoltaic group string, realizes by signal decoding module dissection process signal generation apparatus on each assembly being produced to signal.For reducing interfering with each other between adjacent photovoltaic group string signal of communication, after signal decoding module, adding bandreject filtering module, be used on photovoltaic group string the carrier frequency filtering transmitting code signal.Component voltage, electric capacity, temperature parameter that the current parameters collected and signal decoding module restore, be aggregated in the single-chip microcomputer of signal processing apparatus, transmits further gather to host computer through modes such as radio communication or 485 bus communications.
The above is only preferred implementation of the present utility model; be noted that for those skilled in the art; under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (3)
1. a supervisory control system for photovoltaic plant operation conditions, comprises multiple photovoltaic group string, bus rod, it is characterized in that: also comprise signal generation apparatus, signal processing apparatus, and described photovoltaic group string is composed in series by multiple assembly; Signal processing apparatus comprises multipair port, and often pair of port comprises S+, S-, and each photovoltaic group series winding is connected between S+, S-, and multiple photovoltaic group string is connected in parallel on multipair port respectively, and each photovoltaic group string is connected with female stream that confluxes through signal processing device postpone; Described signal generation apparatus is connected in parallel on assembly; Described signal generation apparatus sends to signal processing apparatus for acquisition component voltage, assembly electric capacity, assembly temperature by current perturbation; Described signal processing apparatus is used for by decoding photovoltaic group crosstalk stream, gathers assembly electric current, component voltage, assembly electric capacity, assembly temperature send to host computer.
2. the supervisory control system of a kind of photovoltaic plant operation conditions according to claim 1, it is characterized in that: described signal generation apparatus comprises signal detection module, signal generating module, voltage acquisition module, electric capacity acquisition module, temperature collect module, single-chip microcomputer, described signal detection module comprises capacitance, bandpass filtering modules block, voltage comparison module, signal contrast module, and described signal generating module comprises DC constant current power supply, switching tube, fundamental frequency generation module, duty cycle control module; Described capacitance, bandpass filtering modules block, voltage comparison module, signal contrast module are connected successively, and described single-chip microcomputer is connected with signal contrast module, and single-chip microcomputer is used for current perturbation in reception, transmission photovoltaic group string and there is situation; Described DC constant current power supply, switching tube, duty cycle control module, fundamental frequency generation module are connected, described duty cycle control module is connected with switching tube, described switching tube is used for control signal generation module and produces current perturbation, described duty cycle control module is connected with single-chip microcomputer, fundamental frequency generation module, realizes coding for changing fundamental frequency carrier duty cycle according to collection signal; Described voltage acquisition module, electric capacity acquisition module, temperature collect module are all connected with single-chip microcomputer, and voltage, electric capacity, temperature signal are encoded by described single-chip microcomputer.
3. the supervisory control system of a kind of photovoltaic plant operation conditions according to claim 1, it is characterized in that: described signal processing apparatus comprises many group current acquisition modules, many groups signal decoding module, multi-group resistance filtration module, single-chip microcomputer, 485 buses, described often organize photovoltaic group string all with current acquisition module, signal decoding module, bus rod is accessed after bandreject filtering module is in series, described often group current acquisition module, signal decoding module is all connected with single-chip microcomputer, the voltage of photovoltaic group crosstalk stream and assembly often organized by described single-chip microcomputer for gathering, electric capacity, temperature signal, described single-chip microcomputer is also connected with 485 buses.
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| CN201520628104.7U CN205017270U (en) | 2015-08-19 | 2015-08-19 | Monitoring system for photovoltaic power plant operation conditions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071770A (en) * | 2015-08-19 | 2015-11-18 | 杨舟 | System for monitoring operation condition of photovoltaic power station |
| WO2023284290A1 (en) * | 2021-07-12 | 2023-01-19 | 中国华能集团清洁能源技术研究院有限公司 | Multi-dimensional tandem photovoltaic string data acquisition system and method |
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2015
- 2015-08-19 CN CN201520628104.7U patent/CN205017270U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071770A (en) * | 2015-08-19 | 2015-11-18 | 杨舟 | System for monitoring operation condition of photovoltaic power station |
| WO2023284290A1 (en) * | 2021-07-12 | 2023-01-19 | 中国华能集团清洁能源技术研究院有限公司 | Multi-dimensional tandem photovoltaic string data acquisition system and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Xinpan Inventor after: Wang Yanbing Inventor after: Yang Zhou Inventor before: Yang Zhou |
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| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160223 Address after: 100085, No. 2, building 2, information road, Haidian District, Beijing, 25C Patentee after: BEIJING TSING YUN ENERGY TECHNOLOGY CO., LTD. Address before: 210000 Jiangsu city of Nanjing province science and Technology Innovation Park kylin (eco technology city) Qi East Road No. 666 Patentee before: NANJING QINGYUN ENERGY TECHNOLOGY CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 100085, No. 2, building 2, information road, Haidian District, Beijing, 25C Patentee after: Beijing Qidi Qingyun Intelligent Energy Co., Ltd Address before: 100085, No. 2, building 2, information road, Haidian District, Beijing, 25C Patentee before: Being Tsingyun Solar Energy Tech Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder |