KR102194384B1 - Photovoltaic power generation having ground voltage and leakage current function and method performing the same - Google Patents

Abstract

The present invention relates to an IoT-based photovoltaic power generation structure having a ground fault and leakage detection function to quickly detect a leakage current and a ground fault during photovoltaic power generation. The IoT-based photovoltaic power generation structure having a ground fault and leakage detection function comprises: a solar cell array in which a plurality of solar cell modules are connected in series, and which provides a direct current generated from the plurality of solar cell modules to an inverter through a direct current wire path; a support structure installed so that the inclination angle can be selectively adjusted while supporting the solar cell array from the ground; a solar cell array angle control device for controlling the inclination angle of the solar cell array to be changed according to external environment information when the solar cell array is tilted to change the inclination angle thereof; an input current detection sensor formed at an output terminal of the plurality of solar cell modules to sense a first current generated from each of the plurality of solar cell modules and applied to the direct current wire path; an output current detection sensor formed at an input terminal of the inverter to sense a second current applied to the inverter; and a control unit for determining whether a leakage has occurred using the first current and the second current, generating an operation signal for controlling the operation of the inverter according to the determination result, and providing the operation signal to the inverter.

Description

IoT-based solar power generation structure with ground fault and leakage detection function and its ground fault and leakage detection method {PHOTOVOLTAIC POWER GENERATION HAVING GROUND VOLTAGE AND LEAKAGE CURRENT FUNCTION AND METHOD PERFORMING THE SAME}

The present invention relates to an IoT-based solar power generation structure having a ground fault and leakage detection function, and a ground fault and leakage detection method thereof, and in more detail, a ground fault and a ground fault capable of quickly detecting a leakage current and a ground fault during solar power generation. It relates to an IoT-based solar power generation structure having a leak detection function and a ground fault and leakage detection method thereof.

Solar power generation is a power generation method that directly converts light energy incident on a solar panel into electrical energy without using fossil energy. The photovoltaic power generation system has the disadvantage that the initial investment cost and power generation cost are high, but it is a semi-permanent life and a pollution-free natural energy source, and its use is gradually increasing as a solution to environmental pollution such as global warming caused by the use of fossil fuels.

These solar power generation systems are independent power generation systems that store generated power in a storage battery and supply power at the required time according to the method of using the generated power, and grid-connected power generation systems that supply generated power to the load and surplus power to the grid. It is divided into. Among them, the grid-connected power generation system is in the spotlight as a distributed power source that replaces the existing power plant.

The grid-connected power generation system includes a photovoltaic array unit including a plurality of photovoltaic panels connected in series with a plurality of photovoltaic modules, an output unit and an output unit that combines and outputs DC power output from the photovoltaic panels. It includes an inverter that converts the DC power output from the DC power into AC power and supplies it to the load or the use system.

The commercial power system is provided with a detection circuit device for detecting a ground fault of a DC line connecting the solar cell and the commercial power system. Failure to properly respond in the event of a ground fault may cause the system connected to the commercial power system to be stopped, and damage to the booster circuit and inverter configured for power conversion may occur, as well as solar power generation and transmission due to the normal operation of the transmission system facilities. This interruption can lead to economic loss and of course a risk due to failure of the transmission equipment.

An object of the present invention is to provide an IoT-based solar power generation structure having a ground fault and leakage detection function that enables rapid detection of leakage current and ground fault during solar power generation, and a ground fault and leakage detection method thereof.

In addition, the present invention is IoT-based solar power generation with a ground fault and leakage detection function that enables rapid detection of leakage current and ground fault through a current sense for detecting the difference in the amount of current flowing through the DC line during solar power generation. It is an object of the present invention to provide a structure and a method for detecting ground faults and leakage thereof.

In addition, the present invention automatically shuts off by using a circuit breaker when a ground fault or leakage is detected during solar power generation, thereby minimizing the occurrence of equipment problems, electric shock and fire due to ground faults and short circuits, and preventing electrical accidents in advance. An object of the present invention is to provide an IoT-based solar power generation structure having a ground fault and leakage detection function and a ground fault and leakage detection method thereof.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention that are not mentioned can be understood by the following description, and will be more clearly understood by examples of the present invention. In addition, it will be easily understood that the objects and advantages of the present invention can be realized by the means shown in the claims and combinations thereof.

In the IoT-based solar power generation structure equipped with a ground fault and leakage detection function to achieve this purpose, a plurality of solar cell modules are connected in series, and the DC current generated from the plurality of solar cell modules is transferred to an inverter through a DC line. Provided solar cell array, a support structure that is installed so that the inclination angle can be selectively adjusted while supporting the solar cell array from the ground, and when the solar cell array is tilted so that the inclination angle of the solar cell array is changed, the solar cell array according to external environment information A solar cell array angle control device for controlling the inclination angle of the solar cell to be changed, an input current detection sensor formed at the output terminal of the plurality of solar cell modules to sense a first current generated from each of the plurality of solar cell modules and applied to a DC line , Using an output current detection sensor formed at the input terminal of the inverter to sense a second current applied to the inverter, and the first current and the second current, determine whether leakage has occurred, and according to the determination result And a control unit generating an operation signal for controlling the operation of the inverter and providing it to the inverter.

In addition, the ground fault and leakage detection method of IoT-based solar power generation structures to achieve this purpose is composed of a plurality of solar cell modules connected in series, supported from the ground through a support structure, and the inclination angle is selective according to external environment information. A solar cell array installed so as to be adjusted to provide DC current generated from the plurality of solar cell modules to an inverter through a DC line, and an input current detection sensor formed at the output terminal of the plurality of solar cell modules Sensing and providing a first current applied to a DC line by DC current generated from each of the battery modules, an output current detection sensor formed at an input terminal of the inverter senses and provides a second current applied to the inverter, the And determining whether a leakage has occurred using the first current and the second current, and generating an operation signal for controlling an operation of the inverter according to the determination result and providing it to the inverter.

In addition, according to the present invention as described above, it provides an IoT-based solar power generation structure having a ground fault and leakage detection function that enables rapid detection of leakage current and ground fault during solar power generation, and a ground fault and leakage detection method thereof. It is aimed at.

In addition, according to the present invention, there is an advantage of being able to quickly detect a leakage current and a ground fault through a current sense for detecting a difference in the current amount of the DC current flowing through the DC line during solar power generation.

In addition, according to the present invention, when a ground fault or leakage is detected during solar power generation, it is automatically cut off using a circuit breaker to minimize the occurrence of equipment problems, electric shock and fire due to ground fault and leakage current, and prevent electric accidents. There is an advantage that it can be prevented.

1 is a network configuration diagram illustrating a monitoring system for an IoT-based solar power generation structure having a ground fault and leakage detection function according to an embodiment of the present invention.
2 is a view for explaining an IoT-based solar power generation structure having a ground fault and leakage detection function according to an embodiment of the present invention.
3 is a block diagram illustrating an internal structure of an IoT-based solar power generation structure having a ground fault and leakage detection function according to an embodiment of the present invention.
4 is a flowchart illustrating a method of detecting ground faults and leakages of an IoT-based solar power generation structure according to the present invention.
5 is a view for explaining a support structure of an IoT-based solar power generation structure having a ground fault and leakage detection function according to an embodiment of the present invention.

The above-described objects, features, and advantages will be described later in detail with reference to the accompanying drawings, and accordingly, one of ordinary skill in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar elements.

In terms of the terms used in the present specification, "inclination angle" refers to an angle between the solar cell array and the ground.

1 is a network configuration diagram illustrating a monitoring system for an IoT-based solar power generation structure having a ground fault and leakage detection function according to an embodiment of the present invention.

Referring to FIG. 1, a monitoring system for an IoT-based solar power generation structure having a ground fault and leakage detection function includes an IoT-based solar power generation structure 100 and a monitoring server 200 having a ground fault and leakage detection function. Done.

IoT-based solar power generation structure 100 equipped with a ground fault and leakage detection function is installed in a general type of basic solar power generation structure installed in a house or building, and on a site or a site building such as a field or rice field, depending on the purpose. It can be divided into a farming type solar power generation structure and an aquatic solar power generation structure installed on water such as a river, lake, or sea.

In the present invention, a safety diagnosis device is installed in such a basic type, farming type, and floating type solar power generation structure, and after measuring the state of each solar power generation structure, it is transmitted to the monitoring server 200 located remotely.

The monitoring server 200 requests, collects, and manages the data measured by the IoT-based solar power generation structure 100 having a ground fault and leakage detection function, and analyzes the state information of the collected solar power generation structure. The current status is diagnosed and displayed.

In addition, the current state of each solar power generation structure diagnosed by the monitoring server 200 is visualized through a web service and provided to an administrator terminal and a user terminal through a communication network such as the Internet.

Accordingly, the administrator and the user can remotely check the status of the solar power generation structure in real time after accessing the monitoring server 200 using a terminal such as a PC, tablet PC, or smartphone in their possession. If diagnosed, you can move to the solar power generation structure and take action quickly.

2 is a view for explaining an IoT-based solar power generation structure having a ground fault and leakage detection function according to an embodiment of the present invention. 3 is a block diagram illustrating an internal structure of an IoT-based solar power generation structure having a ground fault and leakage detection function according to an embodiment of the present invention.

Referring to FIG. 2, the IoT-based solar power generation structure 100 having a ground fault and leakage detection function includes a solar cell array 110, a support structure 120_1 to 120_N, a solar cell array angle control device 130, and an input Current detection sensors 140_1 to 140_N, output current detection sensors 150_1 to 150_N, inverters 160_1 to 160_N, and a controller 170.

The solar cell array 110 may be installed so that the inclination angle can be selectively adjusted while being supported from the ground by providing support structures 120_1 to 120_N.

At this time, the solar cell array 110 and the support structures 120_1 to 120_N are hinged to automatically change the inclination angle of the solar cell array 110 according to the control of the solar cell array angle control device 130 or the support structure 120_1 The height of ~120_N) is changed so that the height of the support structures 120_1 ~ 120_N is changed according to the control of the solar cell array angle control device 130, so that the inclination angle of the solar cell array 110 can be automatically changed. .

The solar cell array 110 is a circuit in which a plurality of solar cell modules are connected in series and combined into one in order to satisfy a predetermined output voltage. In addition, each solar cell module has a plurality of solar cell modules connected in series.

The solar cell array 110 may be fixed and tilted at a specific tilt angle or may be tilted so that the tilt angle is changed according to the control of the solar cell array angle control device 130.

In one embodiment, when the solar cell array 110 is installed so that the inclination angle is changed according to the control of the solar cell array angle control device 130, the solar cell array 110 and the support structures 120_1 to 120_N are hinged Combined so that the solar cell array 110 can automatically change the tilt angle according to the amount of insolation.

In another embodiment, when the solar cell array 110 is installed so that the inclination angle is changed according to the control of the solar cell array angle control device 130, the support structure is supported under the control of the solar cell array angle control device 130 As the height of (120_1 to 120_N) is changed, the inclination angle of the solar cell array 110 may be automatically changed.

In this solar cell array 110, a plurality of solar cell modules 111_1 to 111_N are connected in series so that the DC current generated from each of the plurality of solar cell modules is transferred to the inverters 160_1 to 160_N through the DC cable paths 170_1 to 170_N. ).

The solar cell array 110 includes a plurality of solar cell modules (1, junction box) connected in series and parallel and a power converter that converts DC power generated from the plurality of solar cell modules 111_1 to 111_N according to the characteristics of the consumer. DC wire paths 170_1 to 170_N exist to connect them.

The DC line (170_1~170_N) should connect a plurality of solar cell modules (111_1~111_N) in series to match the input voltage range of the power converter, and also connect the series connected solar cell modules in parallel to increase the current capacity. Should be.

These multiple parallel groups are installed so as to be gathered in a plurality of solar cell modules 111_1 to 111_N, and are fed into the input of the power converter through a single DC wire path 170_1 to 170_N.

Of these direct current wires 170_1 to 170_N, input current detection sensors 140_1 to 140_N are formed at the output terminals of the solar cell modules 111_1 to 111_N, and output current detection sensors 150_1 at the input terminals of the inverters 160_1 to 160_N. ~150_N) is formed.

The input current detection sensors 140_1 to 140_N formed at the output terminals of the solar cell modules 111_1 to 111_N are output from each of the plurality of solar cell modules 111_1 to 111_N and applied to the DC cable paths 170_1 to 170_N. The first current is sensed and provided to the controller 170.

The output current detection sensors 150_1 to 150_N formed at the input terminals of the inverters 160_1 to 160_N are output from each of the plurality of solar cell modules 111_1 to 111_N and pass through the DC cable paths 170_1 to 170_N, and the inverter () The second current applied to is sensed and provided to the control unit 170.

If the difference value between the first current output from the solar cell modules 111_1 to 111_N and applied to the DC cables 170_1 to 170_N and the second current output from the DC cables 170_1 to 170_N is more than a specific value If the back side is a leakage current, the first current output from the solar cell modules 111_1 to 111_N and applied to the DC cable paths 170_1 to 170_N and the second current output from the DC cable paths 170_1 to 170_N If the difference value is less than a certain value, a leakage current has occurred.

Therefore, each of the input current detection sensors 140_1 to 140_N and the output current detection sensors 150_1 to 150_N senses the current and provides it to the control unit 170 so that the control unit 170 provides the input current detection sensors 140_1 to 140_N and the output. By comparing the currents of each of the current detection sensors 150_1 to 150_N, it is possible to check whether a leakage current has occurred.

The control unit 170 is a first current output from each of the plurality of solar cell modules 111_1 to 111_N and applied to the DC cable paths 170_1 to 170_N and a second current measured by the detection current sensors 140_1 to 140_N. Leakage current and ground fault are detected using the difference of.

In one embodiment, the control unit 170 calculates a difference current value between the first current applied to the DC cable paths 170_1 to 170_N and the second current flowing through the DC cable paths 170_1 to 170_N, and the difference current If the value is greater than or equal to a specific value, it is determined that a leakage current has occurred, and an operation stop signal instructing the operation of the inverters 160_1 to 160_N to stop is generated and provided to the inverters 160_1 to 160_N.

In another embodiment, the control unit 170 calculates a difference current value between the first current applied to the DC wire paths 170_1 to 170_N and the second current flowing through the DC wire paths 170_1 to 170_N, and the difference If the current value is less than a specific value, it is determined that no leakage current has occurred, and an operation stop signal instructing the operation of the inverters 160_1 to 160_N to be maintained is generated and provided to the inverters 160_1 to 160_N.

On the other hand, the control unit 170 calculates a difference current value between the first current applied to the DC cable paths 170_1 to 170_N and the second current flowing through the DC cable paths 170_1 to 170_N, and the difference current value is the leakage current It is determined whether it corresponds to a section on the judgment graph. At this time, in the leakage current determination graph, a point corresponding to the normal current is indicated through an indicator bar.

Accordingly, the control unit 170 compares the position of the indicator bar corresponding to the difference current value and the position of the indicator bar corresponding to the normal current to calculate the difference distance even if it is determined that no leakage current has occurred, and then calculates the difference distance according to the difference distance. Increase the number of possible occurrences of leakage current.

In one embodiment, the control unit 170 increases the number of possible occurrence of leakage current when the difference distance calculated by comparing the position of the indicator bar corresponding to the difference current value and the position of the indicator bar corresponding to the normal current is greater than a specific distance. Let it.

In another embodiment, if the difference distance calculated by comparing the position of the indicator bar corresponding to the difference current value and the position of the indicator bar corresponding to the normal current is less than a specific distance, the control unit 170 determines the number of possible occurrence of leakage current. Decrease.

Thereafter, the control unit 170 compares the position of the indication bar corresponding to the difference current value and the position of the indication bar corresponding to the normal current, and if it is determined that no leakage current has occurred, the number of possible occurrence of leakage current is more than a certain number of times. When it is determined that a leakage current has occurred, an operation stop signal instructing the operation of the inverters 160_1 to 160_N to stop is generated and provided to the inverters 160_1 to 160_N.

The support structures 120_1 to 120_N are structures that support the solar cell array 110 and may be fixed to the solar cell array 110, are hinged to each other, or may be implemented to change their height.

That is, when the solar cell array 110 is fixed and tilted at a specific tilt angle, the support structures 120_1 to 120_N may simply be structures supporting the solar cell array 110. However, when the solar cell array 110 is installed to be changed to an inclination angle, the height of the support structures 120_1 to 120_N may be changed.

Tilt sensors 150_1 to 150_N are formed in the solar cell array 110. The tilt for each position of the solar cell array 110 sensed by the tilt sensors 150_1 to 150_N is installed so that the tilt angle of the solar cell array 110 is changed according to the control of the solar cell array angle control device 130. In this case, the changed tilt angle is sensed to sense the tilt for each location.

If the support structures 120_1 to 120_N are implemented such that the height is changed, the first member and the second member may be formed, and the thickness of the first member is implemented to be thinner than the thickness of the second member. Some are inserted into the second member and further enter or exit the second member according to the control of the solar cell array angle control device 130 so that the height of the support structures 120_1 to 120_N is changed. I can. These support structures 120_1 to 120_N will be described in more detail with reference to FIG. 5 below.

When the solar cell array angle control device 130 is installed at an inclined angle such that the inclination angle of the solar cell array 110 is changed, the height of the support structures 120_1 to 120_N so that the inclination angle of the solar cell array is changed according to external environment information. Change.

The solar cell array angle control device 130 determines the inclination angle of the solar cell array 110 according to season information, temperature information, time information, and location information received from an external device, and then the inclination angle of the solar cell array according to the inclination angle. Control the height of the support structure (120_1 ~ 120_N) so that this change.

At this time, the solar cell array angle control apparatus 130 controls the height of the support structures 120_1 to 120_N by extracting a height corresponding to the inclination angle based on the height database for each inclination angle.

In addition, the solar cell array angle control device 130 provides the changed tilt angle to the safety diagnosis device 160 so that the safety diagnosis device 160 compares the tilt angle received from the tilt sensors 150_1 to 150_N to the solar cell array ( 110) to check whether the inclination angle has changed normally.

4 is a flowchart illustrating a method of detecting ground faults and leakages of an IoT-based solar power generation structure according to the present invention.

Referring to FIG. 4, a plurality of solar cell modules are connected in series, and the solar cell array is installed so that the inclination angle can be selectively adjusted according to external environment information while being supported from the ground through a support structure. The DC current generated in the module is provided to the inverter through a DC line (step S410).

The input current detection sensor formed at the output terminals of the plurality of solar cell modules senses and provides a first current applied to the DC line by the DC current generated from each of the plurality of solar cell modules (step S420).

The output current detection sensor formed at the input terminal of the inverter senses and provides the second current applied to the inverter (step S430).

The control unit determines whether or not leakage has occurred using the first current and the second current (step S440).

The controller generates an operation signal for controlling the operation of the inverter according to the determination result and provides it to the inverter (step S450).

In an embodiment of step S450, the control unit calculates a difference current value between the first current applied to the DC line and the second current flowing through the DC line, and if the difference current value is greater than or equal to a specific value, a leakage current has occurred. It determines and generates an operation stop signal instructing to stop the operation of the inverter and provides it to the inverter.

In another embodiment of step S450, the controller calculates a difference current value between the first current applied to the DC line and the second current flowing through the DC line, and when the difference current value is less than a specific value, a leakage current is generated. When it is determined that it has not been performed, an operation stop signal instructing the operation of the inverter to be maintained is generated and provided to the inverter.

Meanwhile, the controller calculates a difference current value between the first current applied to the DC line and the second current flowing through the DC line, and determines whether the difference current value corresponds to a section on the leakage current determination graph. At this time, in the leakage current determination graph, a point corresponding to the normal current is indicated through an indicator bar.

Therefore, the control unit calculates the difference distance even if it is determined that no leakage current has occurred by comparing the position of the indicator bar corresponding to the difference current value and the position of the indicator bar corresponding to the normal current, and then generates a leakage current according to the difference distance. Increase the number of times possible.

In an embodiment, the controller increases the number of possible occurrences of leakage current when the difference distance calculated by comparing the position of the indicator bar corresponding to the difference current value and the position of the indicator bar corresponding to the normal current is greater than a specific distance.

In another embodiment, the controller reduces the number of possible occurrences of leakage current when the difference distance calculated by comparing the position of the indicator bar corresponding to the difference current value and the position of the indicator bar corresponding to the normal current is less than a specific distance.

Thereafter, the control unit compares the position of the indicator bar corresponding to the difference current value and the position of the indicator bar corresponding to the normal current, and even if it is determined that leakage current has not occurred, if the number of possible occurrences of leakage current is more than a certain number, the leakage current is When it is determined that it has occurred, an operation stop signal instructing the operation of the inverter to stop is generated and provided to the inverter.

5 is a view for explaining a support structure of an IoT-based solar power generation structure having a ground fault and leakage detection function according to an embodiment of the present invention.

Referring to FIG. 5, the support structures 120_1 to 120_N are structures that support the solar cell array 110 and may be fixed to the solar cell array 110, are hinged to each other, or may be implemented to change their height.

If the support structures 120_1 to 120_N are implemented such that their height is changed, they may be formed of the first member 121 and the second member 122. The first member 121 and the second member 122 may be implemented as a cylinder or a hexahedron.

The thickness of the first member 121 is implemented to be thinner than the thickness of the second member 122, and a part of the first member 121 is inserted into the second member 122 to control the solar cell array angle According to the control of the device 130, the height of the support structures 120_1 to 120_N may be changed further into or out of the second member 122.

At this time, one side of the first member 121 is in contact with one side of the height adjustment member 123 inserted in the second member 122 and the other side is supporting the solar cell array 110. I can. That is, since the height adjustment member 123 is implemented in the form of a spring and the height is fixed by the height adjustment member fixing member 124, the height of the first member 121 may be changed by the height adjustment member 123. There is.

The lower part of the second member 122 is closed, the height adjusting member 123 is formed on the closed side, and the upper part is open so that the first member 121 can be inserted, and the height adjusting member outside A height adjustment member fixing member 124 that adjusts the height of 123 is formed.

As the height of the height adjustment member fixing member 124 is changed according to the control of the solar cell array angle control device 130, the height of the height adjustment member 123 may be changed. In this way, as the height of the height adjustment member 123 is changed, the height of the first member 121 is changed to further enter or exit the second member 122 to increase the height of the support structures 120_1 to 120_N. Can be changed.

Although described by the limited embodiments and drawings, the present invention is not limited to the above embodiments, which can be various modifications and variations from these descriptions by those of ordinary skill in the field to which the present invention pertains. Accordingly, the idea of the present invention should be grasped only by the scope of the claims set forth below, and all equivalent or equivalent modifications thereof will be said to belong to the scope of the idea of the present invention.

100: IoT-based solar power generation structure with ground fault and leakage detection function
110: solar cell array
120_1~120_N: Support structure
130: solar cell array angle control device
140_1~140_N: Input current detection sensor
150_1~150_N: Output current detection sensor
160_1~160_N: inverter
170: control unit

Claims (4)

A solar cell array in which the inclination angle is changed according to the amount of insolation and a plurality of solar cell modules are connected in series so that the DC current generated from each of the plurality of solar cell modules is supplied to the inverter through a DC line;
An input current detection sensor formed at an output terminal of each of the plurality of solar cell modules and configured to sense a first current output from each of the plurality of solar cell modules and applied to a DC line;
An output current detection sensor formed at an input terminal of the inverter, output from each of the plurality of solar cell modules, passes through a direct current line, and senses a second current applied to the inverter;
A difference current value between the first current sensed by the input current detection sensor and the second current sensed by the output current detection sensor is calculated, and the difference current value is displayed on the leakage current determination graph through an indicator bar. Then, if the difference distance calculated by comparing the position of the indicator bar corresponding to the difference current value and the position of the indicator bar corresponding to the normal current is more than a specific distance, the number of possible leakage currents is increased, and the calculated difference distance is a specific distance. If it is less than or equal to, the number of possible occurrences of the leakage current is reduced, and if the difference current value between the first current sensed by the input current detection sensor and the second current sensed by the output current detection sensor is more than a specific value, the leakage current is It is determined that it has occurred, generates an operation stop signal instructing the operation of the inverter to stop, and provides it to the inverter, and between the first current sensed by the input current detection sensor and the second current sensed by the output current detection sensor And a control unit configured to generate an operation stop signal instructing to stop the operation of the inverter by determining that a leakage current has occurred when the difference current value of is less than a specific value and the number of possible occurrences of the leakage current is more than a specific number of times.
IoT-based solar power generation structure with ground fault and leakage detection function.
delete A solar cell array is configured by connecting a plurality of solar cell modules in series, and is supported from the ground through a support structure, so that the inclination angle can be selectively adjusted according to external environment information. Providing to an inverter through a direct current line;
Sensing, by an input current detection sensor formed at an output terminal of the plurality of solar cell modules, a first current applied to a DC line by the DC current generated from each of the plurality of solar cell modules;
Sensing and providing a second current applied to the inverter by an output current detection sensor formed at the input terminal of the inverter;
Determining whether leakage has occurred using the first current and the second current; And
Generating an operation signal for controlling the operation of the inverter according to the determination result and providing it to the inverter,
The step of determining whether leakage has occurred using the first current and the second current
Calculating a difference current value between the first current and the second current;
If the difference distance calculated by comparing the position of the indicator bar corresponding to the difference current value and the position of the indicator bar corresponding to the normal current after displaying the difference current value through an indicator bar on the leakage current determination graph is greater than a specific distance, leakage Increasing the number of possible occurrences of current, and decreasing the number of possible occurrences of the leakage current when the calculated difference distance is less than or equal to a specific distance;
If the difference current value between the first current and the second current is greater than or equal to a specific value, determining that a leakage current has occurred, generating an operation stop signal instructing to stop the operation of the inverter, and providing it to the inverter; And
If the difference between the first current and the second current is less than a certain value, if it is determined that no leakage current occurs, if the number of possible occurrences of the leakage current is more than a certain number, it is determined that a leakage current has occurred, and the operation of the inverter is stopped. It characterized in that it comprises the step of generating the indicating stop signal
Ground fault and leakage detection method of IoT-based solar power generation structure. delete

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