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 PDF

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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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South Korea
Prior art keywords
surge protector
leakage current
surge
inverter
main
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KR1020150133627A
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Korean (ko)
Inventor
박기주
이광진
라경식
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주식회사 에너솔라
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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
    • 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
    • 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.

Figure R1020150133627

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar power generation system having a surge protection function and a leakage current control device,

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 solar cell array 10 and an inverter 20. The photovoltaic power generation system includes a solar cell 20 which receives solar light and generates electricity by a photoelectric effect, As shown in Fig.

That is, a plurality of solar cell arrays 10 are connected in series or in parallel, and the generation output voltage of the selected solar cell array string is input to the inverter 20 in consideration of the input voltage allowable range of the solar inverter, The output terminal of the solar cell array 10 is connected to the input terminal of the inverter 20 in a serial / parallel manner through the connection terminal of the connection board 40.

DC power is supplied to the inverter 20 via the connection board 40 so that DC power which is an input of the inverter 20 is converted into AC power and is output and the inverter 20 is connected to the system 30 And supplies a sinusoidal current to the load device and the system 30 while performing synchronous operation.

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 solar cell array 10, There is a problem that internal circuits are damaged due to the influence of lightning, lightning or induction noise caused by switching surge of the system.

In addition, the solar power generation system according to the related art has a problem that various units installed in the connection board 40 are damaged due to sudden surge voltage or current, lightning stroke, induced noise, etc., .

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 solar cell arrays 110, a first main surge protector 121 A first surge protector 122, first and second contact switches 131 and 132, a first leakage current detector 140, an inverter 150, a monitoring unit 160, and a management unit 170 .

Here, it is preferable that a plurality of the solar cell arrays 110 are connected in series and / or in parallel, and the DC generation power (voltage and current) generated from each solar cell array 110 is supplied to the solar cell array 110) units to the inverter 150, respectively.

At this time, a DC circuit breaker 181 is provided between the solar cell array 110 and the inverter 150.

The first main surge protector 121 and the first surge protector 122 are connected in parallel between the solar cell array 110 and the inverter 150, And protects the inverter 150 from being damaged when the overvoltage is generated through the first main surge protector 121. If a failure or other abnormality occurs in the first main surge protector 121, the device is protected from the overvoltage or the surge voltage through the first surge protector 122.

The first main surge protector 121 or the first surge protector 122 prevents the load from being damaged by surge voltage through voltage suppression against abnormal overvoltage such as surge voltage caused by lightning or the like.

A leakage current detector 140 is connected between the first main surge protector 121 and the ground terminal. When a leakage current occurs due to aging or failure of the first main surge protector 121, Detects the leakage current through the current detector (140), and transmits the leakage current to the controller (151) configured in the inverter (150). The controller 151 turns off the first contact switch 131 and turns on the second contact switch 132 when the leakage current detected from the first leakage current detector 140 is equal to or greater than the reference value, 1 spare surge protector 122 to operate.

The first main surge protector 121 may be damaged by damage to the electronic device due to the surge protection elements including varistors deteriorating due to the surge inflow of the surge protector. The first leakage current detector 140 may be attached to the first main surge protector 121 to detect the leakage current in real time so that the deterioration state of the first main surge protector 121 can be known.

When the first main surge protector 121 needs to be repaired due to a failure, the controller 151 turns off the first contact switch 131 and turns on the second contact switch 132, The operation of the photovoltaic power generation system can be continued without stopping the operation of the photovoltaic power generation system.

The inverter 150 includes a DC / AC converter 152 for converting DC power supplied from the solar cell array 110 into AC power and is connected to a GRID system 200, which is a commercial power source, While supplying a sinusoidal current to the grid (GRID) system 200. [ When the output of the inverter 150 is not connected to the system 200 but operates independently, the inverter 150 can supply AC power directly developed to the load device.

The inverter 150 includes a control unit 151. The control unit 151 receives the leakage current detected from the first leakage current detector 140 and compares the leakage current with a reference value, 131 or the second contact switch 132 is selectively turned on or off.

The controller 151 receives the leakage current input from the first leakage current detector 140 and estimates the life of the first main surge protector 121 according to the amount of the leakage current. If the leakage current does not flow, the lifetime of the first main surge protector 121 is determined to be 100% (steady state). If the leakage current is 2 mA, the leakage current is 75% 25%, and the leakage current is 8 mA, it is judged to be defective or immediately replaced. However, it is not necessarily limited to the leakage current value.

The monitoring unit 160 monitors the leakage current value detected from the first leakage current detector 140 and the deterioration or hardening state of the first main surge protector 121 and the first surge protector 122, Respectively.

In addition, the monitoring unit 160 may monitor the generated voltage or current signal information including various types of power generation environment information of the solar cell array 110, and may also monitor the power generation voltage or current signal information of the inverter 150 received from the inverter 150, It is possible to monitor the operation state and the amount of power generation of the inverter 150 based on the state information of the inverter 150.

The monitoring unit 160 may display the life (graph) of the first main surge protector 121 or the first surge protector 122, a leakage current amount display, a surge inflow frequency display, a surge inflow date display, a surge inflow path display , A surge inflow time display, a surge inflow size display, a surge input data display, an AC input voltage display, a product unique number display, and the like.

The monitoring unit 160 may display an alarm condition according to the leakage current detected from the first leakage current detector 140. [

The management unit 170 stores and manages various kinds of information transmitted through the wired or wireless communication from the monitoring unit 160.

That is, the management unit 170 stores the lifetime prediction data of the first main surge protector 121, the leakage current amount, the surge inflow frequency, the surge inflow date, the surge inflow path, the surge inflow time, the surge inflow size, Voltage, product unique number data, and the like.

Here, the management unit 170 may make management more useful by using a manager's smartphone. The smartphone is an example of a terminal that provides computing and networking functions, and may use a PDA, a notebook computer, or the like . Therefore, the user can easily check the operation state of the solar cell array 110, the inverter 150, the first main surge protector 121, and the first preliminary surge protector 122 at any time and anywhere without being limited to the time and place .

The monitoring unit 160 monitors the operation status of the solar cell array 110, the inverter 150, the first main surge protector 121, and the first surge protector 122. Graphical user interface User Interface (GUI) method. The graphical genetic interface method is a method of providing information by using a visual element such as an image or a symbol instead of a character.

An AC circuit breaker 182 is provided between the inverter 150 and the system 200.

The first main surge protector 121 and the first preliminary surge protector 122 are disposed inside a connection panel (not shown) for transmitting the direct current power generated from the solar cell array 110 to the inverter 150 .

Meanwhile, the connection unit and the inverter 150 may be integrally formed.

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 current detector 141, a second main surge protector 123 and a second preliminary surge protector 124 are additionally constituted.

A second main surge protector 123 and a second surge protector 123 are connected in parallel to the output terminal of the inverter 150 in order to prevent the equipment connected to the system 200 from overvoltage such as a surge voltage generated in the inverter 150, And a second leakage current detector 141 for detecting a leakage current at the output terminal of the second main surge protector 123. [ Accordingly, it is possible to effectively protect the electronic device with the surge voltage at the AC power terminal of the output of the inverter 150, and to detect the leakage current of the second main surge protector 123 in real time, The failure can be grasped.

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 first surge protector 122, And the third and fourth leakage current detectors 142 and 143 are additionally provided at the output terminals of the second preliminary surge protector 124, respectively.

Accordingly, the leakage current of the first preliminary surge protector 122 and the second preliminary surge protector 124 is detected through the third leakage current detector 142 and the fourth leakage current detector 143, 122 and the second preliminary surge protector 124 can be grasped.

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 control unit 151 determines whether or not the degree of aging is replaced with the surge counter of the first and second main surge protector 121 and 123 and the first and second surge protector 122 and 124.

The control unit 151 controls the first and second surge protector units 121 and 123 and the first and second surge protector units 122 and 124 to generate a leakage current And selectively controls the first and second main surge protector 121 and 123 and the first and second surge protector 122 and 124. [

The monitoring unit 160 may determine whether the degree of senescence is replaced with the degree of aging through the surge counter of the first and second main surge protector 121 and 123 and the first and second surge protector 122 and 124 have.

The leakage current sensed by the first and second leakage current detectors 131 and 132 is transmitted to the monitoring unit 160 through the control unit 151. The monitoring unit 160 monitors the leakage current from the control unit 151 And transmits a signal analyzed by the monitoring unit 160 to the control unit 151 so that the inverter 150 can detect the ground fault of the inverter 150, Limit functionality.

The control unit 151 is installed inside the inverter 150. However, the present invention is not limited to this, and the control unit 151 may be installed outside the inverter 150 or installed inside the monitoring unit 160 have.

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 monitoring unit 160, the manager can monitor the status of solar power generation in real time as well as surveillance.

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)

At least one solar cell array for receiving solar light and producing a DC power source,
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. The solar cell module according to claim 1, further comprising a DC circuit breaker and an AC circuit breaker, which are respectively provided between the solar cell array and the inverter, and between the inverter and the system, and having a double surge protection function and a leakage current control device Solar power system. The solar power generation system according to claim 1, further comprising a management unit for storing and managing various kinds of information transmitted from the monitoring unit. delete The solar surveillance system according to claim 1, wherein the first main surge protector and the first surge protector are constructed inside a connection panel for transmitting DC power generated from the solar cell array to the inverter. Solar power generation system with current control device. 6. The solar power generation system according to claim 5, wherein the inverter and the connection unit are integrally formed. The leakage surveillance device according to claim 1, wherein the controller determines whether the degree of aging is replaced with the first surge protector and the second surge protector through a first surge protector and a second surge protector, A photovoltaic power generation system comprising: delete The apparatus according to claim 1, wherein the monitoring unit determines whether or not the degree of aging is changed through the first and second main surge protector and the first and second surge protector. A photovoltaic power generation system comprising: delete
KR1020150133627A 2015-09-22 2015-09-22 Solar power generation system having Controlling Device for Leakage Current and Double Protection for Surge KR101631998B1 (en)

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
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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KR20090041828A (en) * 2007-10-25 2009-04-29 한국전기연구원 Surge protector and wireless monitoring system therefor
KR101340080B1 (en) * 2013-03-11 2013-12-11 삼도산업전기(주) Control apparatus for automatic switch to main information process module in train control system
JP2014525729A (en) * 2011-09-05 2014-09-29 デーン＋シェーネ ゲーエムベーハ＋ツェオー．カーゲー Method and arrangement for surge protection of an inverter for a photovoltaic system

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Publication number Priority date Publication date Assignee Title
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
JP2014525729A (en) * 2011-09-05 2014-09-29 デーン＋シェーネ ゲーエムベーハ＋ツェオー．カーゲー Method and arrangement for surge protection of an inverter for a photovoltaic system
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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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