KR20220145185A - Monitoring system for photovoltaic electric power station - Google Patents

Abstract

The present invention relates to a cleaning time monitoring system for a solar power station and, more specifically, to a monitoring system that notifies a cleaning time of a solar cell array installed in a whole solar cell array power plant if a difference between an amount of power generated by a first solar cell module equipped with a cleaning system and an amount of power generated by a second solar cell module without the cleaning system is equal to or more than a reference value. More particularly, provided is the cleaning time monitoring system for a solar power station, which compares an amount of power generated by a first solar cell panel (100a) equipped with a cleaning system periodically cleaning a surface of the first solar cell panel (100a) with an amount of power generated by a plurality of solar cell modules (100) installed in a solar power station, and if a difference between the amount of power generated in an area (100h) corresponding to a plane area of the first solar cell panel (100a) among the total area corresponding to a plane of the plurality of solar cell modules (100) and the amount of power generated by the first solar cell panel (100a) is equal to or more than the reference value, notifies a cleaning time to clean surfaces of the plurality of solar cell modules (100).

Description

A monitoring system that informs the cleaning time of a solar power plant {MONITORING SYSTEM FOR PHOTOVOLTAIC ELECTRIC POWER STATION}

The present invention relates to a cleaning timing monitoring system of a solar power plant, and more specifically, the difference in the amount of power generated by the first solar cell module equipped with the cleaning system compared to the amount of power generated by the second solar cell module without the cleaning system by more than a standard value If there is, it is a monitoring system that notifies the cleaning time of the solar cell array installed in the entire solar cell array power plant.

In more detail, the amount of power generated by the first solar cell panel 100a that periodically cleans the surface of the first solar cell panel 100a by mounting a cleaning system and a plurality of solar cell modules 100 installed in the solar power plant of the total area corresponding to the plane of the plurality of solar cell modules 100

If there is a difference between the amount of power generated in the area 100h corresponding to the planar area of the first solar cell panel 100a and the amount of power generated by the first solar cell panel 100a by more than a reference value, the plurality of solar cell modules (100) Provides a solar power plant cleaning time monitoring system that informs the cleaning time to clean the surface.

Recently, as environmental problems of the earth become serious, interest in new/renewable energies is increasing worldwide, and as carbon dioxide emission credits are commercialized internationally, it is urgent in each country to prepare measures to secure carbon dioxide emission rights. In Korea, regulations on carbon dioxide emissions and incentives for new and renewable energy facilities have been institutionalized and implemented. Accordingly, a power generation system using solar power has been recommended as a major power generation system in recent years, and many facilities have been developed and installed and operated in the field. As such a solar power generation system is installed outdoors where direct exposure to sunlight is secured due to the characteristics of the device, or installed in a secluded place where the right to sunlight can be secured, it is difficult for an operator to directly monitor or control the system.

In consideration of this, the configuration of the solar power generation monitoring system of the prior Korean Patent Office Registration No. 10-1032489 includes a plurality of solar cell modules for generating power from sunlight;

A first sensor module for measuring the amount of power generated through the solar cell module, a second sensor module for measuring at least one of a temperature and an amount of insolation at a location where the solar cell module is installed, and outputting it as weather data, the amount of power generated and the a photovoltaic power generation device having a control module that checks an operation state using at least one of weather data and determines whether to clean the solar cell module or whether to transmit data according to the checked operation state;

a connection terminal box equipped with a power output terminal of the solar cell module and a photovoltaic device; and a comprehensive management device for monitoring and remote control of the photovoltaic device by collecting and analyzing at least one of the power generation amount and weather data from the photovoltaic device as monitoring data,

The control module further acquires unique identification information from the first sensor module or the second sensor module, and the amount of power generated at the current time is different from the amount of power generated at the previous time by more than a reference value to the target solar cell module.

If there is a difference of more than a reference value in the amount of power generated at the current time from another adjacent solar cell module using the unique identification information, the operation state of the target solar cell module is recognized as an abnormal state and the solar cell module is cleaned or data transmitted is characterized by determining

It is a system that determines whether to clean the solar cell module by comparing the previous generation and the current generation.

As a result, when the weather continues to flow and the amount of sunlight is irregular, the information is irregular in the comparison of the previous generation and the current generation, so it is reliable information.

As devised in view of the above conventional problems,

In the present invention, if the amount of power generated by the first solar cell module equipped with the cleaning system differs by more than a reference value compared to the amount of power generated by the second solar cell module without the cleaning system, the cleaning time of the solar cell array installed in the entire solar cell array power plant A monitoring system that informs

In more detail, the amount of power generated by the first solar cell panel 100a that periodically cleans the surface of the first solar cell panel 100a by mounting a cleaning system and a plurality of solar cell modules 100 installed in the solar power plant of the total area corresponding to the plane of the plurality of solar cell modules 100

If there is a difference between the amount of power generated in the area 100h corresponding to the planar area of the first solar cell panel 100a and the amount of power generated by the first solar cell panel 100a by more than a reference value, the plurality of solar cell modules (100) Provides a solar power plant cleaning time monitoring system that informs the cleaning time to clean the surface.

According to one aspect of the present invention, the present invention is equipped with a cleaning system to periodically clean the surface of the first solar cell panel 100a, the amount of power generated by the first solar cell panel 100a and

The amount of power generated by the plurality of solar cell modules 100 installed in the photovoltaic power plant is compared with each other, but among the total area corresponding to the plane of the plurality of solar cell modules 100 (the cleaning system of the plurality of solar cell modules 100 ) The device is missing and has not been cleaned periodically)

When there is a difference of more than a reference value compared to an area corresponding to the planar area of the first solar cell panel 100a (corresponding to a portion 100h of the solar cell module), the cleaning time to clean the surfaces of the plurality of solar cell modules 100 Provides a solar power plant cleaning timing monitoring system that informs you of

As described above, in the present invention, if the amount of power generated by the first solar cell module equipped with a cleaning system differs by more than a reference value compared to the amount of power generated by the second solar cell module without the cleaning system, the solar cell array installed throughout the power plant The goal is to provide a technology that can maximize the amount of power generated by a solar cell power plant by providing a monitoring system that notifies the cleaning time of the battery array.

In more detail, the amount of power generated by the first solar cell panel 100a that periodically cleans the surface of the first solar cell panel 100a by mounting a cleaning system and a plurality of solar cell modules 100 installed in the solar power plant of the total area corresponding to the plane of the plurality of solar cell modules 100

If there is a difference between the amount of power generated in the area 100h corresponding to the planar area of the first solar cell panel 100a and the amount of power generated by the first solar cell panel 100a by more than a reference value, the plurality of solar cell modules By providing a solar power plant cleaning time monitoring system that informs the cleaning time to clean the surface of 100

Compared to the plurality of solar cell modules 100 without modification of the structure of the already installed plurality of solar cell modules 100, the cleaning time can be known, thereby reducing system construction cost.

1 is a schematic diagram of a photovoltaic system according to an embodiment of the present invention;
2 is a configuration diagram of a cleaning timing monitoring system system of a solar power plant according to an embodiment of the present invention;
3 and 4 are device diagrams of a cleaning time monitoring system cleaning system of a solar power plant according to an embodiment of the present invention.
5 is an understanding diagram of a cleaning timing monitoring system of a solar power plant according to an embodiment of the present invention;
6A) is the first and second solar cell modules of the present invention,
b) or a flowchart of an embodiment of the present invention.

An embodiment will be described in detail with reference to the accompanying drawings.

The following describes in detail the monitoring of the solar cell power plant (see FIGS. 1 and 2).

First, in the solar cell array 100 , a plurality of solar cell modules may be configured as an array to output a direct current to provide to the connection panel 200 . In the solar cell array (corresponding to the plurality of solar cell modules), a plurality of solar cell modules that convert solar energy into electrical energy and output are connected in series, and a plurality of solar cell arrays may be connected to one connection panel. .

A plurality of solar cell arrays 100 may be connected in parallel to the connection panel 200 . The connection panel 200 connects the solar cell array 100 and the inverter 300 to connect the DC power generated from the solar cell array 100 in series/parallel to be assembled, and there is a fuse and a reverse current prevention system inside. A diode may be installed. A plurality of connection panels may be connected to one inverter.

The inverter 300 may convert the generated power provided in a DC form from the connection panel 200 into an AC and supply it to a load terminal (not shown). The inverter 300 is installed inside the electrical room, and each inverter 300 is connected to a plurality of connection boards 200 and cables to receive DC power.

1 and 2 are diagrams of a solar power generation system monitoring apparatus according to an embodiment of the present invention.

The monitoring device of a solar power plant according to an embodiment of the present invention is mounted inside the current sensor unit 310 installed on the cable 301 leading into the inverter 300, the inverter box or the junction box to perform data communication. It may be configured to include a communication unit 320 and a monitoring unit 400 for receiving current data from the communication unit 320 to monitor the solar power plant.

First, the current sensor unit 310 may be installed for each cable 301 introduced from the solar power plant connection panel to the inverter 300 . The current sensor unit 310 may be, for example, a ring-shaped current transformer installed on each of the cables 301 introduced into the inverter 300 . The current sensor unit 310 may measure a current for each cable 301 introduced into the inverter 300 and transmit current data to the communication unit 320 . Unlike this, it is installed in each of the cables 301 introduced into the inverter 300 using a Hall element or a fuse element to measure the current.

The communication unit 320 may collect and transmit current data measured by the current sensor unit 310 . The communication unit 320 may be installed inside the housing accommodating the inverter 300 and the current sensor unit 310 installed in the cable 301 connecting the connection panel 200 and the inverter 300 leading into the housing. The current data measured by the may be collected and transmitted to the monitoring unit 400 .

The monitoring unit 400 classifies the current data received from the communication unit 320 according to the junction panel 200 that is received for each inverter 300, and compares the junction panel current data for each inverter with each other to connect the solar cell array, It can be determined whether at least one of the half and the inverter is abnormal.

In addition, the monitoring unit 400 may be configured to further include a display device that displays data classified according to the connection panel introduced for each inverter 300 .

The monitoring unit 400 may be installed inside an electrical room accommodating a plurality of inverters or implemented in a management room or a situation room outside the electrical room.

That is, the monitoring unit 400 may receive current data from a plurality of inverters or electrical rooms and use them to determine whether the entire solar power generation system is abnormal or whether individual abnormalities are present, and transmits the situation information to the outside through the display device. can be displayed

The monitoring unit 400 may determine whether any one of the solar cell array, the connection panel, and the inverter is abnormal by using the current data transmitted from the communication unit.

The monitoring unit 400 may determine that an abnormality has occurred in the solar cell array connected to the corresponding connection panel when the current data of the connection panel connected to the specific inverter is out of a preset ratio range compared to the current data of the other connection panel.

The monitoring unit 400 may determine that an abnormality has occurred in the connection panel when the current data of the connection panel connected to the specific inverter is out of a preset ratio range. That is, when the current data of the connection panel greatly deviates from the absolute value, the monitoring unit 400 may determine that an abnormality has occurred in the corresponding connection panel without comparison with the current data of the other connection panel. When an abnormality occurs in a connection panel, the current data of the entire solar cell array connected to the connection panel appears to be out of a normal value, so it is possible to determine whether there is an abnormality using the current data of the connection panel without comparing each other. For example, the monitoring unit 400 may determine that an abnormality has occurred in the corresponding connection panel when it is out of the range of 90% compared to the current value during normal operation, and the ratio range may be changed by setting.

Also, the monitoring unit 400 may determine that an abnormality has occurred in the corresponding inverter when all of the current data of the connection panel connected to the specific inverter is out of a preset ratio range. That is, the monitoring unit 400 may determine that an abnormality has occurred in the corresponding inverter when all the current data of the plurality of connection panels connected to the individual inverters are out of normal values.

Next, look at the configuration corresponding to the claim.

In the following description, the solar cell array 100 may be referred to as a plurality of solar cell modules 100 .

a current sensor unit 310 installed for each cable 301 introduced from the solar power plant connection panel 200 to the inverter 300; a communication unit 320 for collecting and transmitting the current data measured by the current sensor unit 310; and

The current data is classified according to the connection panel 200 that is drawn in for each inverter 300, and the current data of the connection panel 200 for each inverter is compared with each other to compare a plurality of solar cell modules 100 and the connection panel 200. and a monitoring unit 400 for determining whether at least one of the inverters 300 is abnormal;

The present invention is equipped with a cleaning system to periodically clean the surface of the first solar cell panel 100a, the amount of power generated by the first solar cell panel 100a and

The amount of power generated by the plurality of solar cell modules 100 installed in the photovoltaic power plant is compared with each other, but among the total area corresponding to the plane of the plurality of solar cell modules 100 (the cleaning system of the plurality of solar cell modules 100 ) The device is missing and has not been cleaned periodically)

When there is a difference of more than a reference value compared to an area corresponding to the planar area of the first solar cell panel 100a (corresponding to a portion 100h of the solar cell module), the cleaning time to clean the surfaces of the plurality of solar cell modules 100 Provides a solar power plant cleaning timing monitoring system that informs you of

In an embodiment, for example, the planar area of the first solar cell panel 100a is 30cm in width and 30cm in length, and the planar area (area capable of generating power) of a plurality of solar cell modules 100 connected in a plurality in series. For this example, it is 120 cm wide and 120 cm long.

In this state, power is produced under the same conditions (position, inclination angle, azimuth angle, solar irradiation state, etc.) of the solar cell panel, and then produced in the area (120 cm wide and 120 cm long) of a plurality of solar cell modules 100 Comparing the amount of electric power produced by the first solar cell panel 100a (width 30 cm, length 30 cm) and the amount of electric power (detected through a measuring device)

In the plan area (width 120 cm length 120 cm) of the plurality of solar cell modules 100

After subtracting the area corresponding to the area (30 cm in width and 30 cm in length) of the first solar cell panel 100a, the amount of power produced by the subtracted area and the amount of power produced by the first solar cell panel 100a are compared with each other will do

In the above, the planar area refers to an area capable of generating electric power from sunlight.

When comparing the power production in this way, at the beginning of the construction of the solar cell module power plant,

Since the plane of the plurality of solar cell modules 100 is clean, the first solar cell

Even if the power generated by the panel 100a is compared, the production is the same, but

When the plurality of solar cell modules 100 are used for a long period of time, cleaning of the plurality of solar cell modules 100 is not performed, so that the plurality of solar cell modules 100 are placed on a flat surface.

Contaminants accumulate and power production is reduced.

However, since the first solar cell panel 100a is cleaned periodically (the user can manually clean it as needed without mechanical assistance), the reduction in power production is comparable to that of the plurality of solar cell modules 100 . case is minimized.

The first solar cell panel 100a may be installed at a position adjacent to the plurality of solar cell modules 100 .

Even if the first solar cell panel 100a for measurement is cleaned only on a rainy day, it can be compared with a plurality of solar cell modules 100a.

That is, not every day, but sometimes quarterly.

The first solar cell panel 100a cleaned in this way and the plurality of solar cell modules 100b that are not cleaned in this way are different in power production.

In a state where the planes of the plurality of solar cell modules 100 and the first solar cell panel 100a are clean, the power production is measured through a measuring instrument, and then the amount of production produced by the plurality of solar cell modules 100 for a set time is For example, if it is 100 watts, and if the amount of output produced for a set time in the first solar cell panel 100a is, for example, 10 watts, subtracting 90% of the wattage value from 100 watts results in 10 watts It can be calculated in this way .

That is, comparing with each other after subtracting 90% of the amount of power produced by the plurality of solar cell modules 100 is compared. This calculation method requires the user to go to the site (solar power plant) and

This can be done manually with a measuring instrument.

The generation amount measurement as described above can be measured by a user directly at the site of the photovoltaic power plant site, if necessary, and can be measured by interlocking with a monitoring device installed inside the connection panel with a connection panel to be described later. .

In contrast, the Hall element or the fuse element may be used to measure the current by being installed on the cable leading from the solar cell panel to the connection panel and the inverter.

The communication unit may collect and transmit current data measured by the current measurement unit. The communication unit may be installed inside the housing housing the junction panel, and the current data measured by the current measurement unit installed on the junction panel and cable leading into the housing may be collected and transmitted to the monitoring unit.

Looking at another configuration,

a current sensor unit for detecting a cable entering the inverter from a plurality of solar cell modules 100, a communication unit 320 for collecting and transmitting current data measured by the current sensor unit 310;

In the solar power generation system monitoring device comprising a monitoring unit 400 for determining whether one of the solar cell array 100, the connection panel 200 and the inverter 300 is abnormal,

The solar cell array 100 outputs a DC current and provides it to the connection panel 200, but a brush ( 520) by installing

The amount of power generated by the first solar cell module 100a sensed through the brush 520 and the amount of power detected through the sensing unit h

By comparing the amount of power generated by the second solar cell module 100b that has not been cleaned with the amount of power detected through the sensing unit (h) with each other,

If there is a difference more than the reference value, the monitoring unit monitors the entire plane of the solar cell array 100, but (configuration)

The driving motor 500 is connected to the driving motor 500 and the battery 500a by a circuit 500b so as to receive power from the battery 500a.

The driving motor 500 is controlled according to a signal from the control unit 500d, and the control unit 500d is connected to the raindrop sensor 500e for detecting rain water.

When rain is detected through the rain drop sensor 500e and the control unit 500d, the control unit 500d supplies power from the battery 500a to the driving motor 500 through the circuit 500b to supply the driving motor 500 ), the first brush 520 in close contact with the surface of the first solar cell module 100a moves according to the operation of the first solar cell module 100a to monitor the configuration of cleaning the surface of the first solar cell module 100a. .

The driving part of the driving motor 500 and one side of the brush 520 are connected, and the other side of the brush 520 is in close contact with the surface of the first solar cell module 100a.

Therefore, when the forward and reverse rotations of the driving motor are repeated, the brush reciprocates left and right to clean the surface of the first solar cell module 100a.

When the driving motor 500 rotates, the brush 520 may also rotate while cleaning the surface of the first solar cell module 100a.

The surface of the first solar cell module may be cleaned by moving the brush in various ways with the rotational force of the driving motor 500 .

A driving motor 500 is installed on one side of the first solar cell module 100a.

and install the brush 520 on the driving part 510 of the driving motor 500,

The driving motor 500 is connected to the driving motor 500 and the battery 500a by a circuit 500b so as to receive power from the battery 500a.

The circuit 500b is connected to a switch 500c to turn on/off the power flowing through the circuit 500b, the switch 500c is controlled according to a signal from the controller 500d, and the controller 500d is the humidity. In a state equipped with a rain drop sensor (500e) for detecting and a temperature sensor (500f) for detecting the external temperature,

When rain is sensed through the rain drop sensor 500e, the control unit 500d supplies power from the battery 500a to the driving motor 500 through the circuit 500b to drive the brush according to the driving of the driving motor 500. 520 is moved to clean the surface of the first solar cell module 100a

When the external temperature is detected through the temperature sensor 500f and the control unit 500d and the detection result is above the preset temperature, the driving motor 500, the brush and the first solar cell module 100a are not frozen. and turn on/off the switch 500c so that the power of the battery 500a flows to the driving motor 500

When the external temperature is detected through the temperature sensor 500f and the control unit 500d and the detection result is below the preset temperature, it is determined that the brush of the driving motor 500 and the first solar cell module 100a are frozen. and to turn off/off the switch 500c so that the power of the battery 500a flows to the driving motor 500 .

As for the set temperature, the temperature at which the winter temperature freezes the surroundings is less than the set temperature

The ambient temperature without freezing is higher than the set temperature.

The reason for doing this is to prevent the driving motor from operating when the operating parts such as the driving motor are frozen when the temperature is lower than the set temperature in winter.

In particular, when heavy snow falls below the set temperature, snow accumulates and freezes on the surface of the first solar cell module 100a, but the brush cannot sweep away the frozen snow. When the driving motor 500 operates in that state, the driving motor may overheat and lead to a topic of discussion.

However, even if it snows in winter, if the temperature is higher than the set temperature, the falling snow continuously melts and flows down from the surface of the first solar cell module.

The drive motor is not loaded.

The raindrop sensor is a sensor that detects rain or snow, and the technology related to this raindrop sensor includes a stand-alone raindrop sensor of Registration No. 20-0370408, Publication No. 2003-0005887,

Please refer to Publication No. 10-2017-0070533.

100. Module 500. Drive Motor
510. Drive 520. Brush

Claims (2)

The amount of power generated by the first solar cell panel 100a that periodically cleans the surface of the first solar cell panel 100a by installing a cleaning system and the amount of power generated by a plurality of solar cell modules 100 installed in the solar power plant Compared with each other, among the total area corresponding to the plane of the plurality of solar cell modules (100)

If there is a difference by more than a reference value compared to the amount of power generated in the area 100h corresponding to the planar area of the first solar cell panel 100a and the amount of power generated by the first solar cell panel 100a
A monitoring system for informing the cleaning time of the solar power plant, characterized in that it informs the cleaning time to clean the surfaces of the plurality of solar cell modules (100).
The method of claim 1,
A driving motor 500 is installed on one side of the first solar cell module 100a.
and install the brush 520 on the driving part 510 of the driving motor 500,
The driving motor 500 is connected to the driving motor 500 and the battery 500a by a circuit 500b so as to receive power from the battery 500a.
The circuit 500b is connected to a switch 500c to turn on/off the power flowing through the circuit 500b, the switch 500c is controlled according to a signal from the controller 500d, and the controller 500d is the humidity. In a state equipped with a rain drop sensor (500e) for detecting and a temperature sensor (500f) for detecting the external temperature,

When rain is sensed through the rain drop sensor 500e, the control unit 500d supplies power from the battery 500a to the driving motor 500 through the circuit 500b and brushes according to the driving of the driving motor 500. 520 is moved to clean the surface of the first solar cell module 100a

When the external temperature is detected through the temperature sensor 500f and the control unit 500d and the detection result is above the preset temperature, the driving motor 500, the brush and the first solar cell module 100a are not frozen. and turn on/off the switch 500c so that the power of the battery 500a flows to the driving motor 500

When the external temperature is detected through the temperature sensor 500f and the control unit 500d and the detection result is below the preset temperature, it is determined that the brush of the driving motor 500 and the first solar cell module 100a are frozen. and a configuration for turning off/off the switch (500c) so that the electric power of the battery (500a) flows to the driving motor (500).

Images