CN102842881A - Grounding protection device and thin film battery generating device based on grounding protection device - Google Patents
Grounding protection device and thin film battery generating device based on grounding protection device Download PDFInfo
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- CN102842881A CN102842881A CN201210252533XA CN201210252533A CN102842881A CN 102842881 A CN102842881 A CN 102842881A CN 201210252533X A CN201210252533X A CN 201210252533XA CN 201210252533 A CN201210252533 A CN 201210252533A CN 102842881 A CN102842881 A CN 102842881A
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- leakage current
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- ground connection
- master cpu
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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
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The invention relates to a grounding protection device comprising a photovoltaic fuse protector (16), a main control CPU (Central Processing Unit) (12), a leakage current sensor (15), a leakage current sampling conditioning circuit (13) and a grounding disconnection switch (14), wherein the grounding disconnection switch (14), the leakage current sensor (15) and the photovoltaic fuse protector (16) are connected in series, and the photovoltaic fuse protector (16) is grounded; the leakage current sensor (15) is connected with the main control CPU (12) by the leakage current sampling conditioning circuit (13), and is used for acquiring leakage current signals and transmitting the leakage current signals to the leakage current sampling conditioning circuit (13) to be processed; and the main control CPU (12) is connected with a switch and is used for receiving the leakage current signals processed by the leakage current sampling conditioning circuit and controlling the switching on and off of the switch in an intelligent manner. The invention provides the grounding protection device with the combination of the photovoltaic fuse protector and an electricity leakage protection device, and has the advantages of double insurance, high safety and the like.
Description
Technical field
the present invention relates to a kind of earth protective device and based on its hull cell TRT, especially are the DC earthing protective device of hull cell TRT in the grid-connected photovoltaic system.
Background technology
because hull cell self can receive influences such as polarity effect and transparent conductive oxide (TCO) erosion, and this influence will directly cause the cell panel generating efficiency to decline to a great extent, even makes the cell panel permanent damages.In order to address this problem, need prevent the above-described problem from occurring anode or minus earth.
The technical scheme of
available technology adopting is generally two kinds, and a kind of is through the direct ground connection of fuse, with reference to figure 1; When direct earth fault takes place; Fault current triggers fuse 1 and effectively breaks off much larger than fuse 1 rated current, protects successfully; But as shown in Figure 2 is non-indirect earthed; But impedance 2 earth faults (like the connection in series-parallel cell panel indirectly) are taking place, and fault current maybe be less than fuse 1 amount electric current, effectively trigger protection.Another kind method be through measure direct current leak electricity break off the DC input with play with before the identical effect of a kind of method.But in this kind method,, lost efficacy, then can't reach the effect of protection if measure the earth leakage protector device 3 of direct current electric leakage with reference to figure 3.
Two kinds of schemes before sum up
all can't occur guaranteeing the validity of this kind protection under the prerequisite of single components and parts fault in system.
Summary of the invention
The technical problem that
the present invention will solve provides the earth protective device that a kind of photovoltaic fuse combines with earth leakage protective device, and this device has more advantages of higher of dual fail-safe, fail safe.
For addressing the above problem, the technical scheme that the present invention adopts is; A kind of earth protective device comprises the photovoltaic fuse, also comprises master cpu, leakage current sensor, leakage current sampling modulate circuit, ground connection cut-off switch;
Said ground connection cut-off switch, said electricity leakage sensor and the photovoltaic fuse ground connection that is in series;
Said ground connection cut-off switch is connected with said master cpu through leakage current sampling modulate circuit with said leakage current sensor, is used to gather the leakage current signal and passes to leakage current sampling modulate circuit handle;
described master cpu is connected with said ground connection cut-off switch, is used to receive the leakage current signal after the leakage current sample circuit is handled and controls the folding of ground connection cut-off switch.
first preferred version of the present invention is that it also comprises is located at the dc switch that receives master cpu control on the direct current signal line.
second preferred version of the present invention is that it also comprises is located at the alternating-current switch that receives master cpu control on the AC signal line.
the present invention proposes a kind of hull cell TRT based on earth protective device; It comprises film battery assembly, inversion unit, earth protective device; Said earth protective device comprises the photovoltaic fuse that is arranged between film battery assembly and the inversion unit, master cpu, leakage current sensor, leakage current sampling modulate circuit, ground connection cut-off switch, said ground connection cut-off switch, said electricity leakage sensor and the said photovoltaic fuse ground connection that is in series; Said ground connection cut-off switch is connected with said master cpu through leakage current sampling modulate circuit with said leakage current sensor, is used to gather the leakage current signal and passes to leakage current sampling modulate circuit handle; Described master cpu is connected with said ground connection cut-off switch, is used to receive the leakage current signal after the leakage current sample circuit is handled and controls the folding of ground connection cut-off switch.
preferably, said earth protective device comprises that also one is arranged on the dc switch that receives master cpu control between film battery assembly and the inversion unit (11).
preferably, said earth protective device comprises that also one is arranged on the output of inversion unit and receives the dc switch of master cpu control.
technical advantage of the present invention is: it can effectively break off ground connection by two devices.When indirect earthed fault took place, leakage current sensor triggered the ground connection cut-off switch to the leakage data that master cpu provides.Effectively protection system is avoided the direct current shock injury.When direct earth fault takes place when; Except the ground connection cut-off switch can be accomplished effectively disconnection; Guarantee electrical safety under the situation that the ground connection cut-off switch defencive function that the photovoltaic fuse also can have component failure to cause can't normally be accomplished in the electronic system loop, in case the possibility that fire takes place.
Description of drawings
Fig. 1 is the directly grounded structural representation of available technology adopting fuse.
The structural representation of the risk that
Fig. 2 may bring for the direct ground connection of available technology adopting fuse.
Fig. 3 breaks off the structural representation of DC input for available technology adopting measurement direct current leaks electricity.
Fig. 4 is that the present embodiment earth protective device is connected sketch map with protected device.
In
accompanying drawing: 11, inversion unit; 12, master cpu; 13, leakage current sampling modulate circuit; 14, ground connection cut-off switch; 15, leakage current sensor; 16, photovoltaic fuse; 17, film battery assembly; 18, electrical network; 20, dc switch; 21, alternating-current switch.
Embodiment
Set forth preferred embodiment of the present invention below in conjunction with accompanying drawing in detail
, thereby so that advantage of the present invention and characteristic can be easier to it will be appreciated by those skilled in the art that protection scope of the present invention is made more explicit defining.
With reference to figure 4, a kind of earth protective device comprises photovoltaic fuse 16, master cpu 12, leakage current sensor 15, leakage current sampling modulate circuit 13, ground connection cut-off switch 14;
ground connection cut-off switch 14, electricity leakage sensor 15,16 series connection of photovoltaic fuse, photovoltaic fuse 16 ground connection; The ground connection cut-off switch is electrically connected film battery assembly 17.
Leakage current sensor 15 is connected with master cpu 12 through leakage current sampling modulate circuit 13, is used to gather the leakage current signal and passes to leakage current sampling modulate circuit 13 handle;
master cpu 12 is connected with ground connection cut-off switch 14, is used to receive leakage current signal and 14 foldings of Based Intelligent Control ground connection cut-off switch after the leakage current sample circuit is handled.Earth protective device also comprises the dc switch of being located on the direct current signal line 20 and is located at the alternating-current switch 21 on the AC signal line.
In
course of work; Leak electricity indirectly or directly if take place; Leakage current sensor 15 detects electric leakage signals and after leakage current sampling modulate circuit 13 carries out signal condition, sends to master cpu 12 at this moment, but master cpu 12 Intelligence Selection are broken off ground connection cut-off switch 14, dc switch 20, alternating-current switch 21.
Break down when components and parts such as direct electric leakage and ground connection cut-off switch 14, dc switch 20, alternating-current switch 21, master cpu 12, leakage current sensor 15, leakage current sampling modulate circuits 13
; When causing switch to break off; 16 fusing of photovoltaic fuse are accomplished and are broken off defencive function.
a kind of hull cell TRT based on earth protective device; It comprises film battery assembly 17, inversion unit 11, earth protective device; Said earth protective device comprises the photovoltaic fuse 16 that is arranged between film battery assembly 17 and the inversion unit 11, master cpu 12, leakage current sensor 15, leakage current sampling modulate circuit 13, ground connection cut-off switch 14, said ground connection cut-off switch 14, said electricity leakage sensor 15 and said photovoltaic fuse 16 ground connection that is in series; Said ground connection cut-off switch 14 is connected with said master cpu 12 through leakage current sampling modulate circuit 13 with said leakage current sensor 15, is used to gather the leakage current signal and passes to leakage current sampling modulate circuit 13 handle; Described master cpu 12 is connected with said ground connection cut-off switch 14, is used to receive the leakage current signal after leakage current sample circuit 13 is handled and controls 14 foldings of ground connection cut-off switch.
earth protective device comprises that also one is arranged on the dc switch 20 that receives master cpu 12 controls between film battery assembly 17 and the inversion unit 11.Earth protective device comprises that also one is arranged on the output of inversion unit 11 and receives the dc switch 21 of master cpu 12 control.
are above to combine diagram to be illustrated to specific embodiment of the present invention, clearly on the basis of not leaving scope of the present invention and spirit, can much revise prior art and technology.In the technical field, the common knowledge of a GPRS just can be carried out diversified change in technological main idea scope of the present invention under of the present invention.
Claims (6)
1. earth protective device,, it is characterized in that: it comprises photovoltaic fuse (16), master cpu (12), leakage current sensor (15), leakage current sampling modulate circuit (13), ground connection cut-off switch (14);
Said ground connection cut-off switch (14), said electricity leakage sensor (15) and said photovoltaic fuse (16) ground connection that is in series;
Said ground connection cut-off switch (14) is connected with said master cpu (12) through leakage current sampling modulate circuit (13) with said leakage current sensor (15), is used to gather the leakage current signal and passes to leakage current sampling modulate circuit (13) handle;
Described master cpu (12) is connected with said ground connection cut-off switch (14), is used to receive the leakage current signal after leakage current sample circuit (13) is handled and controls ground connection cut-off switch (14) folding.
2. earth protective device according to claim 1 is characterized in that: it also comprises is located at the dc switch (20) that receives master cpu (12) control on the direct current signal line.
3. earth protective device according to claim 1 is characterized in that: it also comprises is located at the alternating-current switch (21) that receives master cpu (12) control on the AC signal line.
4. hull cell TRT based on the said earth protective device of claim 1; It is characterized in that: it comprises film battery assembly (17), inversion unit (11), earth protective device; Said earth protective device comprises the photovoltaic fuse (16) that is arranged between film battery assembly (17) and the inversion unit (11), master cpu (12), leakage current sensor (15), leakage current sampling modulate circuit (13), ground connection cut-off switch (14), said ground connection cut-off switch (14), said electricity leakage sensor (15) and said photovoltaic fuse (16) ground connection that is in series; Said ground connection cut-off switch (14) is connected with said master cpu (12) through leakage current sampling modulate circuit (13) with said leakage current sensor (15), is used to gather the leakage current signal and passes to leakage current sampling modulate circuit (13) handle; Described master cpu (12) is connected with said ground connection cut-off switch (14), is used to receive the leakage current signal after leakage current sample circuit (13) is handled and controls ground connection cut-off switch (14) folding.
5. hull cell TRT according to claim 4 is characterized in that: said earth protective device comprises that also one is arranged on the dc switch (20) that receives master cpu (12) control between film battery assembly (17) and the inversion unit (11).
6. hull cell TRT according to claim 4 is characterized in that: said earth protective device comprises that also one is arranged on the output of inversion unit (11) and receives the dc switch (21) of master cpu (12) control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210252533XA CN102842881A (en) | 2012-07-20 | 2012-07-20 | Grounding protection device and thin film battery generating device based on grounding protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210252533XA CN102842881A (en) | 2012-07-20 | 2012-07-20 | Grounding protection device and thin film battery generating device based on grounding protection device |
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| CN102842881A true CN102842881A (en) | 2012-12-26 |
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| CN201210252533XA Pending CN102842881A (en) | 2012-07-20 | 2012-07-20 | Grounding protection device and thin film battery generating device based on grounding protection device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474969A (en) * | 2013-09-18 | 2013-12-25 | 江苏兆伏新能源有限公司 | Ground fault detecting protective circuit of photovoltaic module |
| CN103490402A (en) * | 2013-09-05 | 2014-01-01 | 南京南瑞继保电气有限公司 | Photovoltaic module grounding device, photovoltaic module grounding monitoring device and monitoring method |
| CN103558496A (en) * | 2013-11-14 | 2014-02-05 | 阳光电源股份有限公司 | Single pole grounding system and fault detection device and method thereof |
| WO2015180623A1 (en) * | 2014-05-28 | 2015-12-03 | 阳光电源股份有限公司 | Non-isolated photovoltaic grid-connected inverter and photovoltaic grid-connected power generation system |
| CN106575858A (en) * | 2014-06-30 | 2017-04-19 | 洛克威尔自动控制技术股份有限公司 | Motor control center with an automatic fused grounding of the load terminals |
| CN109188167A (en) * | 2018-08-28 | 2019-01-11 | 厦门科华恒盛股份有限公司 | Ground fault detection device and method |
| CN109188166A (en) * | 2018-08-28 | 2019-01-11 | 厦门科华恒盛股份有限公司 | Ground fault detection device and method |
| CN110187222A (en) * | 2019-05-28 | 2019-08-30 | 科华恒盛股份有限公司 | Bus wiring faults detection circuit and failure judgment method |
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| US20080123226A1 (en) * | 2006-11-24 | 2008-05-29 | Mcginn Patrick | Ground Fault Detector Interrupter |
| US20090190275A1 (en) * | 2008-01-29 | 2009-07-30 | Gilmore Jack A | System and method for ground fault detection and interruption |
| CN202218006U (en) * | 2011-05-24 | 2012-05-09 | 上海正泰电源系统有限公司 | Grounding fault detecting and protecting device of solar photovoltaic inverter |
| CN202840461U (en) * | 2012-07-20 | 2013-03-27 | 江苏兆伏新能源有限公司 | Ground protection apparatus and thin film battery power generation apparatus based on the same |
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2012
- 2012-07-20 CN CN201210252533XA patent/CN102842881A/en active Pending
Patent Citations (4)
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| US20080123226A1 (en) * | 2006-11-24 | 2008-05-29 | Mcginn Patrick | Ground Fault Detector Interrupter |
| US20090190275A1 (en) * | 2008-01-29 | 2009-07-30 | Gilmore Jack A | System and method for ground fault detection and interruption |
| CN202218006U (en) * | 2011-05-24 | 2012-05-09 | 上海正泰电源系统有限公司 | Grounding fault detecting and protecting device of solar photovoltaic inverter |
| CN202840461U (en) * | 2012-07-20 | 2013-03-27 | 江苏兆伏新能源有限公司 | Ground protection apparatus and thin film battery power generation apparatus based on the same |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490402A (en) * | 2013-09-05 | 2014-01-01 | 南京南瑞继保电气有限公司 | Photovoltaic module grounding device, photovoltaic module grounding monitoring device and monitoring method |
| CN103474969A (en) * | 2013-09-18 | 2013-12-25 | 江苏兆伏新能源有限公司 | Ground fault detecting protective circuit of photovoltaic module |
| CN103558496A (en) * | 2013-11-14 | 2014-02-05 | 阳光电源股份有限公司 | Single pole grounding system and fault detection device and method thereof |
| CN103558496B (en) * | 2013-11-14 | 2016-08-17 | 阳光电源股份有限公司 | A kind of one pole earthed system and failure detector, method |
| WO2015180623A1 (en) * | 2014-05-28 | 2015-12-03 | 阳光电源股份有限公司 | Non-isolated photovoltaic grid-connected inverter and photovoltaic grid-connected power generation system |
| CN106575858A (en) * | 2014-06-30 | 2017-04-19 | 洛克威尔自动控制技术股份有限公司 | Motor control center with an automatic fused grounding of the load terminals |
| CN106575858B (en) * | 2014-06-30 | 2018-12-04 | 罗克韦尔自动化技术公司 | The motor control center of automatic fuse protection ground connection with face terminals |
| CN109188167A (en) * | 2018-08-28 | 2019-01-11 | 厦门科华恒盛股份有限公司 | Ground fault detection device and method |
| CN109188166A (en) * | 2018-08-28 | 2019-01-11 | 厦门科华恒盛股份有限公司 | Ground fault detection device and method |
| CN110187222A (en) * | 2019-05-28 | 2019-08-30 | 科华恒盛股份有限公司 | Bus wiring faults detection circuit and failure judgment method |
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Application publication date: 20121226 |