CN202586499U - Intelligent arc detection device used for photovoltaic-power-station direct current side - Google Patents
Intelligent arc detection device used for photovoltaic-power-station direct current side Download PDFInfo
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- CN202586499U CN202586499U CN201220137888XU CN201220137888U CN202586499U CN 202586499 U CN202586499 U CN 202586499U CN 201220137888X U CN201220137888X U CN 201220137888XU CN 201220137888 U CN201220137888 U CN 201220137888U CN 202586499 U CN202586499 U CN 202586499U
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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
Abstract
The utility model relates to an intelligent arc detection device used for a photovoltaic-power-station direct current side. The arc detection apparatus comprises a current acquisition module, a multipath switching module, an alternating current component amplification module, a direct current component amplification module, a four-stage filter, an arc detection module, a voltage signal acquisition module, a voltage signal conditioning module, a voltage and current acquisition module, a CPU module, an input and output module and a 485 communication module. The current acquisition module is connected with the multipath switching module. The multipath switching module is connected with the alternating current component amplification module and the direct current component amplification module respectively. An output terminal of the alternating current component amplification module is connected to the four-stage filter. The four-stage filter is connected to the arc detection module. The voltage signal acquisition module is connected to the voltage signal conditioning module. The voltage signal acquisition module and the direct current component amplification module are connected to the voltage and current acquisition module. The CPU module is connected with the arc detection module, the input and output module, the 485 communication module and the voltage and current acquisition module respectively. By using the integrated arc detection module of the utility model, generation of a fire of a photovoltaic system can be effectively prevented.
Description
Technical field
The utility model relates to a kind of photovoltaic technology, is specifically related to a kind of device that is used to detect photovoltaic plant DC side electric arc.
Background technology
Whole world oil crisis and climate warming cause the fast development of various novel green regenerative resource.But, make to be very easy to take place electrical fire between photovoltaic cell, photovoltaic DC cable, photovoltaic cell and photovoltaic cable owing to install or the assembly quality problem.This its main cause is owing to the arc discharge fault causes.
Because original photovoltaic protection assembly can not effectively be judged arc discharge, has very easily caused the property loss of photovoltaic system.
Therefore, how realizing arc discharge fault in the photovoltaic system is effectively detected is the problem that this area is needed solution badly.
The utility model content
The utility model can not effectively be judged the arc discharge fault to photovoltaic protection assembly in the existing photovoltaic system, has very easily caused the problem of photovoltaic system property loss, and a kind of device of the Intelligent Measurement that can carry out photovoltaic plant DC side electric arc is provided.This installs integrated arc-detection module, can effectively prevent the generation of the fire of photovoltaic system.
In order to achieve the above object, the utility model adopts following technical scheme:
The intelligent electric arc detecting device that is used for the photovoltaic plant DC side, said electric arc detecting device comprise current acquisition module, multichannel handover module, alternating current component amplification module, DC component amplification module, level Four filter, arc-detection module, voltage signal acquisition module, voltage signal conditioning module, electric current and voltage acquisition module, CPU module, input/output module and 485 communication modules;
Said current acquisition module links to each other with the multichannel handover module, and said multichannel handover module links to each other respectively with the DC component amplification module with the alternating current component amplification module respectively;
The output of said alternating current component amplification module is connected to the level Four filter, and said level Four filter links to each other with the arc-detection module;
Said voltage signal acquisition module is connected to the voltage signal conditioning module, and said DC component amplification module is connected to the electric current and voltage acquisition module with the voltage signal conditioning module;
Said CPU module links to each other with arc-detection module, input/output module, 485 communication modules and electric current and voltage acquisition module respectively.
In an instance of the utility model; Said level Four filter is made up of secondary high pass filter and secondary low pass filter; The input of said secondary high pass filter links to each other with the output of alternating current component amplification module; The input of output and secondary low pass filter is joined, and the output of said secondary low pass filter links to each other with the arc-detection module.
The utility model that forms according to such scheme adopts multidiameter option switch, and the electric current of each photovoltaic cell string of poll has reduced the cost of system.
Simultaneously, adopt each road current signal of algorithm real-time analysis of intelligence, can just detect fault at the initial stage that arc fault produces, and when detecting the fault generation, cut off contactor automatically, blocking-up electric arc can effectively prevent the generation of the fire of photovoltaic system.
Description of drawings
Further specify the utility model below in conjunction with accompanying drawing and embodiment.
Fig. 1 is the theory diagram of the utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 1; The intelligent electric arc detecting device 100 that is used for the photovoltaic plant DC side is realized function corresponding through integrated corresponding functional modules, specifically comprises current acquisition module 102, multichannel handover module 103, alternating current component amplification module 104, DC component amplification module 107, level Four filter 105, arc-detection module 106, voltage signal acquisition module 109, voltage signal conditioning module 110, electric current and voltage acquisition module 108, CPU module 101, input/output module 111 and 485 communication modules 112.
Wherein, current acquisition module 102 comprises some resistance or current transformer, utilizes current sampling resistor or current transformer to gather the size of current in the photovoltaic cell string.
Alternating current component amplification module 104 is specially corresponding alternating current component amplifying circuit, and it takes out AC portion with the current signal of gathering in the multichannel handover module 103, is connected to level Four filter 105 after the amplification.
Level Four filter 105 comprises secondary high pass filter 105a and secondary low pass filter 105b.Because the switching frequency of inverter is 10～30KHz; Can produce a lot of low-frequency disturbance, and the structure of solar cell string and reception antenna are closely similar, can receive high frequency radio signal; And in the photovoltaic cell string, produce High-frequency Interference, therefore disturb through these low-and high-frequency of 4 grades of filter eliminations.The input of secondary high pass filter 105a links to each other with the output of alternating current component amplification module 104 in the utility model, thereby the AC signal after amplifying through alternating current component amplification module 104 is carried out high-pass filtering, reaches secondary low pass filter 105b afterwards; Secondary low pass filter 105b carries out reaching arc-detection module 106 behind the LPF to the AC signal that imports into again.
Arc-detection module 106, owing to when in the photovoltaic cell string arc fault taking place, can in the current in wire of battery strings, produce current noise at random, the current noise of electric arc itself can be detected in the Gaussian distribution of a few megahertz frequency spectrums 0.Therefore, the arc-detection module 106 in the utility model is carried out analog-to-digital conversion with filtered current signal, and the conversion back becomes amplitude component and frequency component carrying out FFT with signal decomposition, then the amplitude amplitude under the different frequency is analyzed.
DC component amplification module 107 is specially corresponding DC component amplifying circuit, and it takes out direct current component with the current signal of gathering in the multichannel handover module 103, reaches electric current and voltage acquisition module 108 after the amplification.
Voltage signal acquisition module 109 is specially the correspondent voltage signal acquisition circuit, and it gathers the voltage signal of photovoltaic cell from photovoltaic cell string two ends, and reaches voltage signal conditioning module 110.
Voltage signal conditioning module 110 is used for the voltage signal that voltage signal acquisition module 109 is gathered is decayed and amplitude limiting processing, and reaches electric current and voltage acquisition module 108.Because the voltage of photovoltaic cell string so will decay and amplitude limit to it, prevents to damage internal circuit up to 700～800V.
Electric current and voltage acquisition module 108 carries out analog-to-digital conversion with the voltage and current signal that collects, and delivers to CPU module 101.
Input/output module 111 is used to gather outside digital quantity and output switching value.
485 communication modules 112 are specially 485 communicating circuits, its just the level conversion of CPU module 101 become 485 level, make the CPU module 101 can be through 485 and upper machine communication.
By the integrated arc-detection module of intelligent electric arc detecting device that such scheme forms, can effectively prevent the generation of the fire of photovoltaic system.
More than show and described the advantage of basic principle, principal character and the utility model of the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection range to be defined by appending claims and equivalent thereof.
Claims (2)
1. the intelligent electric arc detecting device that is used for the photovoltaic plant DC side; It is characterized in that said electric arc detecting device comprises current acquisition module, multichannel handover module, alternating current component amplification module, DC component amplification module, level Four filter, arc-detection module, voltage signal acquisition module, voltage signal conditioning module, electric current and voltage acquisition module, CPU module, input/output module and 485 communication modules;
Said current acquisition module links to each other with the multichannel handover module, and said multichannel handover module links to each other respectively with the DC component amplification module with the alternating current component amplification module respectively;
The output of said alternating current component amplification module is connected to the level Four filter, and said level Four filter links to each other with the arc-detection module;
Said voltage signal acquisition module is connected to the voltage signal conditioning module, and said DC component amplification module is connected to the electric current and voltage acquisition module with the voltage signal conditioning module;
Said CPU module links to each other with arc-detection module, input/output module, 485 communication modules and electric current and voltage acquisition module respectively.
2. the intelligent electric arc detecting device that is used for the photovoltaic plant DC side according to claim 1; It is characterized in that; Said level Four filter is made up of secondary high pass filter and secondary low pass filter; The input of said secondary high pass filter links to each other with the output of alternating current component amplification module, and the input of output and secondary low pass filter is joined, and the output of said secondary low pass filter links to each other with the arc-detection module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220137888XU CN202586499U (en) | 2012-04-01 | 2012-04-01 | Intelligent arc detection device used for photovoltaic-power-station direct current side |
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| CN201220137888XU CN202586499U (en) | 2012-04-01 | 2012-04-01 | Intelligent arc detection device used for photovoltaic-power-station direct current side |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215826A (en) * | 2014-06-05 | 2014-12-17 | 张天福 | Faulted arc type electrical fire monitoring detector and faulted arc recognition and alarm method |
| CN104410360A (en) * | 2014-10-17 | 2015-03-11 | 广东易事特电源股份有限公司 | Safe operation method of photovoltaic power generation system, training method for artificial neural network and real-time detection method in safe operation method, and real-time detection device |
| CN105403816A (en) * | 2015-10-30 | 2016-03-16 | 国家电网公司 | Identification method of DC fault electric arc of photovoltaic system |
| CN105452879A (en) * | 2013-07-30 | 2016-03-30 | 艾思玛太阳能技术股份公司 | Apparatus for detecting ac components in a dc circuit and use of the apparatus |
| CN106990282A (en) * | 2017-04-19 | 2017-07-28 | 宁波中车时代传感技术有限公司 | Multi channel currents sensor is used in direct-current arc detection |
| CN107064673A (en) * | 2017-03-30 | 2017-08-18 | 上海理工大学 | Electric arc detecting device and double-fed wind power generator electric brush slip ring protection system |
| CN109975669A (en) * | 2019-04-04 | 2019-07-05 | 苏州易启康电子科技有限公司 | Arc current intelligent detection module and its working method |
| WO2024001817A1 (en) * | 2022-06-27 | 2024-01-04 | 华为数字能源技术有限公司 | Photovoltaic converter and photovoltaic power generation system |
-
2012
- 2012-04-01 CN CN201220137888XU patent/CN202586499U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105452879A (en) * | 2013-07-30 | 2016-03-30 | 艾思玛太阳能技术股份公司 | Apparatus for detecting ac components in a dc circuit and use of the apparatus |
| CN105452879B (en) * | 2013-07-30 | 2019-02-05 | 艾思玛太阳能技术股份公司 | For measuring the device and application thereof of the exchange electric component in direct current electrical circuit |
| CN104215826A (en) * | 2014-06-05 | 2014-12-17 | 张天福 | Faulted arc type electrical fire monitoring detector and faulted arc recognition and alarm method |
| CN104410360A (en) * | 2014-10-17 | 2015-03-11 | 广东易事特电源股份有限公司 | Safe operation method of photovoltaic power generation system, training method for artificial neural network and real-time detection method in safe operation method, and real-time detection device |
| CN105403816A (en) * | 2015-10-30 | 2016-03-16 | 国家电网公司 | Identification method of DC fault electric arc of photovoltaic system |
| CN107064673A (en) * | 2017-03-30 | 2017-08-18 | 上海理工大学 | Electric arc detecting device and double-fed wind power generator electric brush slip ring protection system |
| CN106990282A (en) * | 2017-04-19 | 2017-07-28 | 宁波中车时代传感技术有限公司 | Multi channel currents sensor is used in direct-current arc detection |
| CN109975669A (en) * | 2019-04-04 | 2019-07-05 | 苏州易启康电子科技有限公司 | Arc current intelligent detection module and its working method |
| WO2024001817A1 (en) * | 2022-06-27 | 2024-01-04 | 华为数字能源技术有限公司 | Photovoltaic converter and photovoltaic power generation system |
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| C14 | Grant of patent or utility model | ||
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Owner name: TIANDI TDENERGY (BEIJING) TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: TDENERGY INTELLIGENT TECHNOLOGY (SHANGHAI) CO., LTD. Effective date: 20130319 |
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Owner name: TDENERGY INTELLIGENT TECHNOLOGY (SHANGHAI) CO., LT Free format text: FORMER NAME: SHANGHAI TD ENERGY INTERNATIONAL LIMITED |
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Free format text: CORRECT: ADDRESS; FROM: 201612 SONGJIANG, SHANGHAI TO: 100083 HAIDIAN, BEIJING |
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Address after: 201612, No. 255, Lane 37, Si brick road, Xinqiao Town, Shanghai, Songjiang District Patentee after: HUIBAO INTELLIGENT TECHNOLOGY (SHANGHAI) Co.,Ltd. Address before: 201612, No. 255, Lane 37, Si brick road, Xinqiao Town, Shanghai, Songjiang District Patentee before: TD ENERGY SHANGHAI Co.,Ltd. |
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Effective date of registration: 20130319 Address after: 100083 No. 9 West Fourth Ring Road, Beijing, Haidian District 2106-118 Patentee after: Tiandi Huibao (Beijing) Technology Co.,Ltd. Address before: 201612, No. 255, Lane 37, Si brick road, Xinqiao Town, Shanghai, Songjiang District Patentee before: HUIBAO INTELLIGENT TECHNOLOGY (SHANGHAI) Co.,Ltd. |
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Effective date of registration: 20150916 Address after: 201612 Shanghai City, Songjiang Caohejing Songjiang District hi tech park Xinzhuan Highway No. 518 building 23 room 502-1 Patentee after: HUIBAO INTELLIGENT TECHNOLOGY (SHANGHAI) Co.,Ltd. Address before: 100083 No. 9 West Fourth Ring Road, Beijing, Haidian District 2106-118 Patentee before: Tiandi Huibao (Beijing) Technology Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20190401 |