KR101631998B1 - Solar power generation system having Controlling Device for Leakage Current and Double Protection for Surge - Google Patents
Solar power generation system having Controlling Device for Leakage Current and Double Protection for Surge Download PDFInfo
- Publication number
- KR101631998B1 KR101631998B1 KR1020150133627A KR20150133627A KR101631998B1 KR 101631998 B1 KR101631998 B1 KR 101631998B1 KR 1020150133627 A KR1020150133627 A KR 1020150133627A KR 20150133627 A KR20150133627 A KR 20150133627A KR 101631998 B1 KR101631998 B1 KR 101631998B1
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- Prior art keywords
- surge protector
- leakage current
- surge
- inverter
- main
- Prior art date
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1236—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of surge arresters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inverter Devices (AREA)
- Photovoltaic Devices (AREA)
Abstract
The present invention relates to a solar power generation system equipped with a double surge protection function and a leakage current control device which are equipped with a double surge protection function to improve the efficiency of use of the system and to prevent the burnout of the apparatus and diagnose the aging of the surge protector The main surge protector can be replaced in the active state, thereby enabling the power generation to proceed without stopping the inverter, thereby securing the power generation time and preventing the burn-in of the inverter device.
Description
The present invention relates to a solar photovoltaic power generation system, and more particularly, to a solar power generation system, which improves the use efficiency of a device and improves the utilization efficiency of the system, and has a double surge protection function and a leakage current control And more particularly, to a solar power generation system having an apparatus.
In recent years, research on alternative energy has been actively conducted to cope with depletion of fossil fuels and solving environmental problems. Especially, researches on photovoltaic power generation are being actively studied among alternative energy related researches, and the solar power generation rate shows a rapid increase which is doubled every two years on average. The increase in solar power generation is one of the fastest growing sectors in energy technology, and it is one of the candidates to replace the current major development methods.
1 is a conceptual diagram showing a conventional solar power generation system.
1, a conventional photovoltaic power generation system is composed of a
That is, a plurality of
DC power is supplied to the
At this time, for the purpose of monitoring the power generation status of the solar power generation facilities and analyzing the abnormality, it is necessary to monitor the power generation status of a plurality of solar cell arrays or analyze the power generation status such as the generated voltage / current, the array temperature, the ambient temperature, It is necessary to constantly monitor the data necessary for the operation.
On the other hand, in the conventional photovoltaic power generation system, since the solar cell array strings are generally installed in the hills or the building roof, the surge voltage received by the
In addition, the solar power generation system according to the related art has a problem that various units installed in the
In addition, a surge protector (SPD) or a common ground to the earth can be provided at the output of the solar cell array to protect the equipment from surge voltage. However, leakage due to the minute leakage current due to the aging of the surge protector or common ground Power generation efficiency is reduced by forcibly tripping the inverter by detecting the current by the inverter and the device is burned down as the number of ON / OFF times of the inverter is increased.
In addition, since the leakage current sensitivity itself may affect the device or the human body, the control device and algorithm for preventing the leakage current may be applied to the device or the human body.
SUMMARY OF THE INVENTION The present invention provides a solar power generation system having a double surge protection function and a leakage current control device for preventing the burnout of equipment and improving the utilization efficiency of the system by installing a surge protection function It has its purpose.
Further, the present invention can diagnose the aging of the surge protector and enable the replacement of the main surge protector in the active state, thereby enabling the power generation to proceed without stopping the inverter, thereby securing the power generation time and preventing the burn- Another object of the present invention is to provide a solar power generation system having a protection function and a leakage current control device.
In addition, the present invention provides a solar power generation system having a double surge protection function and a leakage current control device for detecting a ground fault and detecting a leakage current in real time to prevent a human body from being sensed in advance, There is a purpose.
According to an aspect of the present invention, there is provided a solar power generation system including a double surge protection function and a leakage current control device. The solar power generation system includes at least one solar cell array receiving sunlight to produce DC power, A first main surge protector connected to an output terminal of the solar cell array for protecting the inverter from a surge voltage generated from the solar cell array; A first surge protector connected in parallel with the first main surge protector to protect the inverter from a surge voltage when the first main surge protector generates a leakage current equal to or greater than a reference value due to deterioration or aging of the first main surge protector; And a second main surge protector disposed between the main surge protector and the ground terminal, A first leakage current detector configured to detect a leakage current; a leakage current detector configured to receive a leakage current detected by the first leakage current detector and to compare the leakage current with a reference value, and to turn off the first main surge protector if the leakage current is greater than a reference value A first main surge protector and a first preliminary surge protector are respectively provided with first and second contact switches which are respectively turned on and off through the control of the control unit; A second main surge protector and a second surge protector having the same configuration as that of the output terminal of the solar cell array, and a second main surge protector and a second surge protector; OFF state of the first preliminary surge protector and a second end of the second preliminary surge protector; And, it characterized in that the configuration comprises a first monitor for displaying the leakage current, the first degraded condition and aging, and the replacement cycle of the protecting group the main surge detection in the leakage current detector.
The solar power generation system having the double surge protection function and the leakage current control device according to an embodiment of the present invention has the following effects.
First, with the double surge protection function, it is possible to prevent the equipment from being burned out and to improve the utilization efficiency of the system.
Second, by diagnosing the aging of the surge protector and enabling the main surge protector to be replaced in the active state, it is possible to proceed with solar power generation without stopping the inverter, thereby securing power generation time and preventing burning of the inverter device.
Third, by detecting leakage current in real time, human body detection can be prevented in advance, thereby reinforcing electric safety accidents.
1 is a conceptual diagram illustrating a conventional photovoltaic power generation system
2 is a conceptual diagram schematically showing a solar power generation system having a double surge protection function and a leakage current control device according to a first embodiment of the present invention.
3 is a conceptual diagram schematically showing a solar power generation system having a double surge protection function and a leakage current control device according to a second embodiment of the present invention.
4 is a conceptual diagram schematically showing a solar power generation system having a double surge protection function and a leakage current control device according to a third embodiment of the present invention.
5 and 6 are diagrams showing a screen for displaying the occurrence and surveillance status of surge through GUI based on the monitoring unit of FIG.
Hereinafter, the present invention will be described in detail with reference to the drawings. It is to be noted that the same elements among the drawings are denoted by the same reference numerals whenever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.
2 is a conceptual diagram schematically showing a solar power generation system having a double surge protection function and a leakage current control device according to a first embodiment of the present invention.
As shown in FIG. 2, a solar power generation system having a double surge protection function and a leakage current control device according to the first embodiment of the present invention includes a plurality of
Here, it is preferable that a plurality of the
At this time, a
The first
The first
A leakage
The first
When the first
The
The
The
The
In addition, the
The
The
The
That is, the
Here, the
The
An
The first
Meanwhile, the connection unit and the
3 is a conceptual diagram schematically showing a solar power generation system having a double surge protection function and a leakage current control device according to a second embodiment of the present invention.
As shown in FIG. 3, in the solar power generation system having the double surge protection function and the leakage current control device according to the second embodiment of the present invention, compared with the first embodiment, 3 and fourth contact switches 133 and 134, a second leakage
A second
On the other hand, in the second embodiment, detailed description of those having the same configurations and functions as those of the first embodiment will be omitted.
4 is a conceptual diagram schematically showing a solar power generation system having a double surge protection function and a leakage current control device according to a third embodiment of the present invention.
As shown in FIG. 4, the solar photovoltaic power generation system having the double surge protection function and the leakage current control apparatus according to the third embodiment of the present invention is different from the second embodiment in that the
Accordingly, the leakage current of the first
On the other hand, in the third embodiment, detailed description of those having the same configurations and functions as those of the first and second embodiments will be omitted.
The
The
The
The leakage current sensed by the first and second leakage
The
5 and 6 are views showing the occurrence and surveillance of surge through the GUI based on the monitoring unit of FIG.
As shown in Figs. 5 and 6, a ground fault occurs in the solar cell array portion and a surge is generated and applied to the inverter is previously cut off through the first main surge protector or the first surge protector, Can be prevented in advance.
Through the screen displayed on the
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments or constructions. Can be carried out within a limited range. Accordingly, such modifications are deemed to be within the scope of the present invention, and the scope of the present invention should be determined by the following claims.
110: solar cell array 121: first main surge protector
122: first surge protector 123: second main surge protector
124: second spare surge protector 131: first contact switch
132: second contact switch 140: first leakage current detector
141: second leakage current detector 150: inverter
151: control unit 152: DC / AC converter
160: monitoring unit 170:
181: DC breaker 182: AC breaker
Claims (10)
An inverter for converting the DC power produced by the solar cell array into an AC power and supplying the converted AC power to the grid power,
A first main surge protector connected to an output terminal of the solar cell array for protecting the inverter from a surge voltage generated from the solar cell array,
A first surge protector connected in parallel with the first main surge protector to protect the inverter from a surge voltage when the first main surge protector generates a leakage current equal to or higher than a reference value due to deterioration or aging of the first main surge protector;
A first leakage current detector disposed between the first main surge protector and the ground terminal for detecting a leakage current of the first main surge protector;
A first leakage current detector configured to detect a leakage current from the first leakage current detector and to compare the leakage current with a reference value to turn off the first main surge protector and turn on the first preliminary surge protector when the leakage current is greater than a reference value;
The first main surge protector and the first preliminary surge protector are respectively provided with first and second contact switches that are turned on or off through the control of the controller,
A second main surge protector and a second surge surge protector having the same configuration as an output terminal of the solar cell array are provided at an output terminal of the inverter, and the control of the control unit is applied to the front ends of the second main surge protector and the second surge protector, Third and fourth contact switches which are turned ON or OFF,
A second leakage current detector configured between the first preliminary surge protector and the ground;
And a monitoring unit for displaying a leakage current detected by the first leakage current detector, a deterioration and an aging state of the first main surge protector, and a replacement period,
Wherein the monitoring unit monitors in real time the operation status of the inverter and whether the first and second main surge arresters and the first and second surge arresters are in operation,
Wherein the control unit selectively controls the first and second main surge arresters and the first and second main surge arresters and the first and second reserve surge arresters when a leakage current of the first and second main surge arresters and the first and second surge arresters is generated, Control a surge protector,
The leakage current sensed by the first and second leakage current detectors is transmitted to the monitoring unit through the control unit. The monitoring unit analyzes the magnitude of the leakage current transmitted through the control unit, And controls the inverter to limit the trip function due to the self-ground fault detection of the inverter by transmitting a signal analyzed by the monitoring unit to the control unit. Photovoltaic system.
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KR1020150133627A KR101631998B1 (en) | 2015-09-22 | 2015-09-22 | Solar power generation system having Controlling Device for Leakage Current and Double Protection for Surge |
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KR1020150133627A KR101631998B1 (en) | 2015-09-22 | 2015-09-22 | Solar power generation system having Controlling Device for Leakage Current and Double Protection for Surge |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107482785A (en) * | 2017-09-30 | 2017-12-15 | 河北中渠光伏技术有限公司 | A kind of grid-connected case of Internet of Things |
CN109149406A (en) * | 2018-09-29 | 2019-01-04 | 湖州电力设备成套有限公司 | A kind of grid-connected cabinet |
CN111509659A (en) * | 2019-01-30 | 2020-08-07 | 施耐德电气工业公司 | Device for monitoring surge protector and assembly method thereof |
KR102286629B1 (en) * | 2020-09-01 | 2021-08-05 | (주)넥스트파워 | Solar power generation system with fire prediction algorithm and blocking function |
KR20220097315A (en) * | 2020-12-30 | 2022-07-07 | 유한회사 중앙강재 | Monitoring device for solar power generation inverter efficiency analysis and failure prediction |
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KR20080108657A (en) * | 2007-06-11 | 2008-12-16 | 조경준 | Device for defence surge of dual processing in telephon line |
KR20090041828A (en) * | 2007-10-25 | 2009-04-29 | 한국전기연구원 | Surge protector and wireless monitoring system therefor |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN107482785A (en) * | 2017-09-30 | 2017-12-15 | 河北中渠光伏技术有限公司 | A kind of grid-connected case of Internet of Things |
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CN111509659A (en) * | 2019-01-30 | 2020-08-07 | 施耐德电气工业公司 | Device for monitoring surge protector and assembly method thereof |
KR102286629B1 (en) * | 2020-09-01 | 2021-08-05 | (주)넥스트파워 | Solar power generation system with fire prediction algorithm and blocking function |
KR20220097315A (en) * | 2020-12-30 | 2022-07-07 | 유한회사 중앙강재 | Monitoring device for solar power generation inverter efficiency analysis and failure prediction |
KR102541385B1 (en) * | 2020-12-30 | 2023-06-13 | (유)중앙강재 | Monitoring device for solar power generation inverter efficiency analysis and failure prediction |
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