KR20210115432A - Operation and management system of photovoltaic power plant and method thereof - Google Patents

Abstract

The present invention relates to an operation and management system of a solar power plant and a method thereof and, more specifically, to an operation and management system of a solar power plant and a method thereof for detecting overall power generation condition including geographic and natural environments of the solar power plant through a monitoring device, monitoring production power of each solar string through a string monitoring device, detecting a slope of a panel through a tilt detecting device, using a drone to quickly check for an abnormality in the solar power plant based on the power generation condition, the production power, and a value of the slope, and calculating scope of manpower and equipment for the checked abnormality.

Description

OPERATION AND MANAGEMENT SYSTEM OF PHOTOVOLTAIC POWER PLANT AND METHOD THEREOF

The present invention relates to an operation/management system and method for a solar power plant, and more particularly, comprehensively detects the power generation situation including the geographical and natural environment of the solar power plant through a monitoring device, and solar power through a string monitoring device Monitors the power produced by each string, detects the tilt state of the panel through the tilt detection device, and uses a drone to quickly check whether or not there is an abnormality in the solar power plant based on the power generation status, the generated power per string and the tilt value And, it relates to an operation/management system and method of a solar power plant that can calculate the range of manpower and equipment for the confirmed abnormality.

As the solar power plant has been recommended as a priority power generation system for major new and renewable energy in recent years, numerous power generation facilities and infrastructure facilities necessary for their operation have been developed.

The solar power plant is a part of the DC power that converts and transmits solar light into electrical energy from the photovoltaic module to the inverter, the part of AC power that converts DC power into AC power through the inverter and delivers it to the grid, and the power generation of the solar power plant. It is divided into the monitoring part that manages the amount of power generation, etc.

At this time, in order to maintain the amount of power output from the photovoltaic power plant, maintenance and management must be accompanied, and failures and abnormalities must be promptly removed.

A monitoring system that checks the amount of electrical energy generated in a photovoltaic power plant is to remotely detect the status of an inverter to check the status of a string or a solar module. A method and system for data analysis of a solar power plant are disclosed.

The technology includes the steps of calculating the theoretical expected power generation of the solar power plant, obtaining the measured power generation actually collected from the photovoltaic power plant, and comparing the difference between the expected power generation amount and the measured power generation amount according to the result of the solar power generation It is characterized in that it comprises the steps of determining whether the power generation loss of the power plant and, when it is determined that the power generation loss of the photovoltaic power plant has occurred, determining the cause of the loss based on the lost power generation amount.

However, the above technology has a problem in that it is not possible to grasp the state of the solar power generation facility, and it is insufficient to quickly respond to natural disasters such as rainfall, earthquake, heavy snow, or damage caused by malicious intent.

In addition, a method and system for inspecting a solar panel using a drone are disclosed in Korean Patent Registration No. 10-2032722.

The technology includes a central server that divides the solar panel group into a plurality of areas based on an image of the solar panel group photographed through a camera, and assigns an ID (identification) of the solar panel to each area; and a flying object that shoots an image of a solar panel included in the solar panel group, and transmits ID information of the photographed solar panel and an image obtained as a result of the photographing to a central server.

However, the technique is to inspect a solar panel based on an image taken during a relatively short flight time of the drone, and it is difficult to apply to a solar power plant of several tens to hundreds of MW or more, and there is a disadvantage that a detailed inspection cannot be made.

On the other hand, most solar power plants check the status only through information transmitted from the inverter. In other words, most solar power plants without permanent personnel have almost no way to check them unless they visit the site after a breakdown occurs.

Solar power plants with resident personnel are also often difficult to perform precise inspections because only routine visual inspections are possible. Although efforts are being made, most of them are limited to the initial technology, so it is difficult to use them for actual maintenance.

The application of the condition monitoring system of a solar power plant is a system that has been recently reviewed and applied. Before the condition monitoring system was applied, when an abnormality occurred in a solar power plant, the entire power plant had to be thoroughly inspected to determine the cause. At the same time as the increase, baseless rumors due to the deterioration of the profits of solar power plants were also being circulated.

Registered Patent Publication No. 10-2065443 (2020.02.07.) Registered Patent Publication No. 10-2032722 (2019. 10. 10.)

The present invention was created to solve the problems of the prior art, and the problem to be solved in the present invention is to continuously monitor the power generation status of a solar power plant through a monitoring device, and a string through a string monitoring device It monitors whether there is an abnormality in power production for each star and detects the inclination of the solar panel in real time through the inclination detection device. Including) to provide an operation/management system and method of a solar power plant that can specify the location of the solar power plant.

In addition, another problem to be solved in the present invention is based on the power generation situation, the power produced by each string, and the slope value, and when an abnormality occurs, a drone is used to closely photograph the region where the abnormality occurs, and maintenance based on the captured image To provide a solar power plant operation/management system and method that can quickly calculate the manpower and equipment required for

In order to solve the above problems, the operation/management system of a solar power plant according to the present invention is a solar array to which a plurality of solar strings are connected, and a connection for collecting DC power produced from the solar array by connecting in series or parallel. a monitoring device comprising an inverter converting DC power output from the connection panel into AC power and supplying it to a grid, and detecting a state of the inverter; String monitoring device for monitoring the state of the solar string; a tilt detection device for detecting a tilt of a structure in which a solar panel is installed; a drone device that transmits an image captured while flying over the upper part of the solar array; and a control device that determines whether the solar power plant is abnormal based on information transmitted from the monitoring device, string detection device, tilt detection device, and drone device, and calculates information on maintenance and management based on the determined information It is characterized in that it includes.

Here, the monitoring device includes: a power control unit for detecting and managing the amount of electricity generated by the solar array and the power status of the system; a power generation forecasting unit for calculating a predicted power generation amount based on the altitude of the sun, the amount of incident light of the sun, temperature, and humidity; a fault diagnosis unit for diagnosing whether the solar string, the connection panel and the inverter are faulty; a power generation status calculation unit for calculating statistical information on the amount of electricity produced by the connection panel; and a monitoring unit for displaying the result values output from the power control unit, the generation amount prediction unit, the fault diagnosis unit, and the generation status calculation unit.

In addition, the solar string monitoring device continuously monitors each power value for the incoming power line connected to the solar string, and accumulates or compares and analyzes the monitored power values to generate power from each solar string. characterized by monitoring.

In addition, the tilt detection device includes a plurality of tilt sensor modules installed on the structure supporting the solar panel; a gradient value collecting module for collecting gradient values output from the plurality of inclination sensor modules; And it characterized in that it comprises a transmission module that combines the identification number of the solar string or panel and the array corresponding to the slope value output from the slope value collecting module and transmits to the control device.

In addition, the solar panel includes a light source disposed inside the solar panel and outputting colored light by the applied power; and a transparent film disposed in front of the light source module and formed horizontally with the solar string, wherein the control device controls the color density and size of the light source output from the light source module in the image captured by the drone. It is characterized in that the surface contamination information of the solar panel is detected based on the

In order to solve the above problems, the method for operating/managing a photovoltaic power plant according to the present invention receives information from a monitoring device for detecting the state of an inverter and a string detecting device for detecting the state of the photovoltaic string. step; an abnormality determination step of determining whether the solar power plant is abnormal based on the information received in the information receiving step; If it is determined that an abnormality has occurred as a result of the determination of the abnormality determination step, a continuation determination step of determining whether a temporary phenomenon or a continuous phenomenon has occurred; When it is determined that the continuous phenomenon is a continuous phenomenon as a result of the determination of the continuity determination step, an image receiving step of photographing an image of a solar string in which abnormality is generated through a drone device, and receiving the photographed image; and an equipment/manpower calculation step of calculating equipment and manpower for maintenance/management based on the captured image received in the image receiving step.

According to the present invention, since it is possible to specify an area where an abnormality has occurred in a large-capacity solar power plant through monitoring and string monitoring, it is possible to minimize the time and manpower required for maintenance as the area required for inspection is limited. There is this.

In addition, as the abnormality occurrence area is specified, the time for checking whether there is an abnormality using the drone is shortened, and there is an advantage in that the abnormality occurrence region can be quickly detected.

In addition, there is an advantage in that it is possible to increase the precision of the abnormality by determining whether the error is a temporary error or a continuous error through the string monitoring device.

In addition, it is possible to determine whether there is an abnormality in the solar panel through the image taken by the drone, and based on the collected information and the image information photographed by the drone device, according to the abnormality, the recovery equipment and manpower are appropriately put in to perform the rapid restoration. It has the advantage of being able to carry out continuous solar power generation through

In addition, it is divided into a plurality of stages according to the degree and duration of the detected abnormality, and is configured to take appropriate measures for each divided stage, so there is an advantage that maintenance/management can be performed in consideration of the precedence of occurrence of abnormality. .

1 is a schematic configuration diagram of an operation / management system of a solar power plant according to the present invention;
2 and 3 are single-phase equivalent circuit diagrams for the operating state of the filter applied to the operation / management system of the solar power plant according to the present invention;
4 is a configuration diagram of a monitoring device applied to the operation / management system of a solar power plant according to the present invention;
5 is a connection configuration diagram of a string monitoring device applied to an operation / management system of a solar power plant according to the present invention;
6 and 7 are, respectively, a configuration diagram and an internal configuration diagram of a tilt sensor of a tilt detection device applied to the operation/management system of a solar power plant according to the present invention;
8 is a side cross-sectional view showing an embodiment for detecting pollution information of a solar panel applied to the operation/management system of a solar power plant according to the present invention;
9 is a flowchart of an operation/management method of a solar power plant according to the present invention.

Next, a preferred embodiment of a solar power plant operation / management system and method according to the present invention will be described in detail with reference to the drawings.

Hereinafter, the same reference numerals are used for technical elements having the same function, and repeated detailed descriptions are omitted to avoid overlapping descriptions.

In addition, the examples described below are illustratively shown in order to effectively show the preferred embodiments of the present invention, and should not be construed to limit the scope of the present invention.

1 is a schematic configuration diagram of an operation/management system of a solar power plant according to the present invention.

1 , the operation/management system of a solar power plant according to the present invention includes a solar array 10 , a connection panel 20 , an inverter 30 , a monitoring device 100 , and a string monitoring device 200 . ), a tilt detection device 300 , a drone 400 and a control device 500 .

The photovoltaic array 10 has a structure in which a plurality of photovoltaic strings 11 are connected, and the photovoltaic string 11 has a structure in which a plurality of panels are connected.

These solar strings (11, or panels) are installed at a predetermined distance from the ground in a structure including an H-beam, a square shape or an angle, etc. on a base plate, which is generally a concrete structure. Here, of course, the base plate may be omitted or buried in the ground depending on installation conditions.

The DC power produced by the solar array 10 collects voltages of the same polarity in the connection panel 20 as one connection point. In addition, although not shown in the drawing, a DC converter for maintaining the combined output power at a constant DC link voltage is configured at the rear end of the connection panel 20, and an energy storage device (ESS) for storing DC power produced according to design conditions , Energy Storage System), etc. may be further installed.

The inverter 30 converts the DC power output from the connection panel 20 (or, if the ESS is included, including the ESS) into AC power of the system and supplies it to the system.

In the above configuration, between the AC power output side of the inverter 30 and the grid, a transformer 40 for converting AC power to the voltage of the grid is installed, and the surge voltage of the grid or harmonics generated in the solar inverter 30 A filter 50 may be further installed between the inverter 30 and the transformer 40 to attenuate the .

2 and 3 show a single-phase equivalent circuit for the operating state of the filter applied to the operation / management system of the solar power plant according to the present invention.

2 and 3 , the filter 50 includes a series inductor 51 , a first switch 52 , a parallel inductor 53 , and a second switch 54 .

The series inductor 51 limits the magnitude of the short-circuit current of the system, and the first switch 52 is connected in parallel with the series inductor 51 to control whether the series inductor 51 is turned on or not.

The parallel inductor 53 determines the magnitude of the fault voltage, and the second switch 54 is connected in series with the parallel inductor 53 to control whether the parallel inductor 53 is turned on or not.

Here, a capacitor may be applied instead of the parallel inductor 53, but when a higher-order filter of the LC structure is applied, the harmonic attenuation rate is increased, but if the first-stage filter of the L structure is applied or the filter coefficient adjustment is inaccurate Since the risk of resonance occurs, the LL structure of the series inductor and parallel inductor type is applied in the present invention.

Let's look at the switching operation of the filter through the above configuration.

In the normal state of the grid voltage, the first switch 52 is maintained in a closed state and the second switch 54 is maintained in an open state, so that the power output from the inverter 30 does not pass through the series inductor 51 . It is bypassed by the first switch 52 without being supplied to the system (see FIG. 2).

If it is determined that the system voltage is lowered by more than a certain level, the first switch 52 is switched to an open state and the second switch 54 is switched to a closed state, and the series inductor 51 and the parallel inductor (53) is put into the system, whereby reactive power is supplied to the system (see FIG. 3).

When the system voltage returns to the normal state, the first switch 52 is switched to a closed state (close) and the second switch 54 is switched to an open state (see FIG. 2 ).

In the above process, a first delay time and a second delay time are respectively set between the operation of the first switch 52 and the operation of the second switch 54 . That is, when the first switch 52 is switched to the open state and the second switch 54 is simultaneously switched to the closed state, the series inductor 51 and the parallel inductor 53 are simultaneously connected to the system. input, and the system impedance changes rapidly. That is, a switching ripple is applied to the voltage due to a sudden change in impedance.

That is, the first delay time is a time from when the first switch 52 operates (open) and the series inductor 51 is put into the system until the second switch 54 operates (on), and the second delay time is the time until the first switch 52 operates (on) after the second switch 54 operates (open) and the parallel inductor 53 is disconnected from the system.

Accordingly, when the grid voltage is in a low voltage state by setting the delay time, the parallel inductor 53 is put into the grid after a predetermined time after the series inductor 51 is turned on, thereby supplying reactive power to the grid, and the grid voltage is In the case of returning to normal, the series inductor 51 is disconnected from the system after a predetermined time after the parallel inductor 53 is disconnected from the system to supply active power, thereby reducing the switching ripple.

The monitoring device 100 is remotely disposed to detect and display the power status of DC power input to the inverter 30 and AC power outputted to the inverter 30, and FIG. 4 shows the operation of the solar power plant according to the present invention. / It is a diagram showing the configuration of the monitoring device applied to the management system.

4 , the monitoring device 100 includes a power control unit 110 , a generation amount prediction unit 120 , a fault diagnosis unit 130 , a power generation status calculation unit 140 , and an output unit 150 . is composed by

The power control unit 110 detects the amount of electric energy produced by the solar array 10 and power information of the system to control the power of the inverter 30 with power that can be supplied to the system. That is, the power control unit 110 detects and manages the amount of power produced by the solar power plant and the amount of power supplied to the load from the system.

The generation amount prediction unit 120 performs a function of calculating the generation prediction amount based on the altitude of the sun, the amount of incident light of the sunlight, temperature, and humidity.

The amount of power produced by the solar power plant is affected by weather changes such as the amount of incident light and temperature of sunlight, and thus unstable power is generated. Accordingly, the requirement for stably maintaining system power through the calculation of the amount of power that can be output from the photovoltaic power generation facility can be predicted.

In order to predict the amount of solar power generation in a specific place in advance, it is necessary to identify meaningful trends or influences through time-series analysis based on data measured in the past. For this purpose, a statistical algorithm such as an exponential smoothing method or an autoregressive-moving average model may be used.

Therefore, the amount of power generation prediction unit 120 applied to the present invention for predicting the amount of power generated by the solar power plant, the amount of power generated based on the measured weather information of the meteorological state measured at the location where the solar array is installed, and the measured weather information It is configured to calculate and output the expected output power generation amount of the inverter based on the receiver weather information received from the meteorological information providing device based on the power generation amount at the time of measurement.

In other words, the power generation prediction unit 120 detects the amount of power generated at the measurement point based on the measured weather information detected at the location where the solar array is installed, the time and the date, and provides weather information provided through a communication network such as the Internet. Based on the receiver meteorological information provided from the device (eg, the Meteorological Agency server, etc.), the estimated power generation predicted amount is calculated and output.

In this case, the predicted power generation amount calculated by the power generation forecasting unit 120 may be configured to be calculated by dividing it into a short-term power generation predicted amount, a medium-term power generation predicted amount, and a long-term power generation predicted amount.

The short-term power generation predicted amount predicts the amount of power produced according to the reception cycle of the receiver weather information, and is a predicted amount that can be generated after 2-3 hours from the measurement point.

The medium-term power generation forecast is to predict the amount of electricity produced for one to two weeks, and the long-term power generation forecast is the forecast amount that can be generated monthly or quarterly.

The fault diagnosis unit 130 performs a function of diagnosing the failure of the solar array, the connection panel and the inverter, and the fault diagnosis of the connection panel and the inverter transmits a synchronization signal to the connection panel and the inverter, respectively, and the transmitted synchronization It is configured to determine whether a failure occurs according to whether or not a response signal to the signal is received.

The power generation status calculation unit 140 calculates statistical information on the amount of generated power output from the connection panel, and the statistical information calculated from the generation status calculation unit 140 includes real-time power output from the connection panel, today's generation amount, It includes hourly power generation, daily power generation, monthly power generation, cumulative power generation, and the like.

The output unit 150 visually displays the information calculated by the power control unit 110 , the generation amount prediction unit 120 , the failure diagnosis unit 130 , and the generation status calculation unit 140 .

The string monitoring device 200 performs a function of monitoring whether the solar string 11 is abnormal by detecting the power produced by the solar string of an individual unit.

5 is a diagram illustrating a connection configuration of a string monitoring device applied to an operation/management system of a solar power plant according to the present invention.

1, the string monitoring device 200 is connected to the connection panel 20 and is illustrated as monitoring the power produced by the solar string, but the string monitoring device 200 according to design conditions is As shown in FIG. 5 , it may be disposed inside the connection panel 20 .

The string monitoring device 200 monitors the power produced by each solar string, which monitors the power of the power line input to the connection panel 20 to monitor the production power status of the solar string.

For example, as shown in FIG. 5 , when n solar strings 11a to 11n are configured, the string monitoring device 200 provides respective voltages for n incoming power lines connected to the solar strings. / Continuously monitors the power value for current and monitors the power produced by each solar string by accumulating or comparing and analyzing each power value output from the individually monitored solar strings.

In other words, the string monitoring device 200 individually monitors the production power of the first solar string 11a, the production power of the second solar string 11b, and the production power in the n-th solar string 11n. will do

For example, when the generated power output from the photovoltaic string 11b is relatively lower than that of the neighboring photovoltaic strings 11a and 11c, it is determined that an abnormality has occurred in the photovoltaic string 11b. can

That is, when the string monitoring device 200 individually monitors the power generated from the solar string, when the generated power output from one solar string is relatively lower than the generated power of the neighboring solar string , a solar string with relatively low production power is judged as an abnormal string.

The power produced by the solar string may be temporarily reduced due to shading such as clouds, but the power reduction due to the temporary shading may be resolved with the lapse of a predetermined time. However, the continuous power reduction can be regarded as an abnormality.

Therefore, the string monitoring device 200 determines that an abnormality has occurred when the continuous decrease in the production power is maintained even after a predetermined time has elapsed in the solar string in which the abnormality has occurred, based on the generated power for each solar string. , will print it out.

In this way, as the string monitoring device 200 individually monitors the power produced by the solar string, it is possible to specify the solar string in which the abnormality has occurred, and to easily check the location of the specified solar string. do.

According to the string monitoring device 200, it is possible to not only specify an area where an abnormality has occurred in a large-capacity solar power plant through string monitoring, but also determine whether the abnormal power of the solar string is a temporary error or a continuous error. , it has the advantage of increasing the precision of whether there is an abnormality.

On the other hand, relatively large-scale photovoltaic power plants are installed in landfills or mountainous areas as a large site is required. However, such reclaimed land or mountainous areas have a soft ground, so the ground is frequently subsided or lost due to natural disasters such as the rainy season, earthquake, heavy snow, and strong wind.

In particular, in the case of a photovoltaic power plant installed on soft ground in a landfill or mountainous area, ground subsidence due to earthquakes and rainfall is high, and the solar string (or panel) is installed from the liquefaction and uplift of the ground. It is difficult to guarantee the safety of

6 and 7 are diagrams showing an arrangement diagram and an internal configuration diagram of a tilt sensor of a tilt detection device applied to an operation/management system of a solar power plant according to the present invention, respectively.

Referring to the attached FIG. 6 , the tilt detection device 300 applied to the present invention is configured to include a tilt sensor module 310 , a tilt value collecting module 320 , and a transmission module 330 .

The inclination sensor module 310 is installed in a structure (not shown) that supports a solar string (or a panel and an array) to perform a function of detecting the degree of inclination, and includes a base plate, a vertical frame, a horizontal frame, and sunlight. It is installed on a string frame, etc., and a plurality of them are installed to sense the inclination of up/down/left/right. At this time, the inclination sensor module 310 is configured to be operated in a set period (eg, 1 to 10 minutes), and the period is configured to be changeable in seconds or hours by a user's operation. do.

The inclination value collecting module 320 performs a function of collecting the inclination values output from the plurality of inclination sensor modules 310 .

The inclination value collecting module 320 collects the inclination values detected by the plurality of inclination sensor modules 310 and transmits the collected inclination values to the transmission module 330 .

The transmission module 330 combines the identification information of a structure (solar string or panel and array) corresponding to the slope value output from the slope value collection module 320 and transmits the combination to the control device 500 . .

Here, the identification information includes the ID and location information of the structure corresponding to the inclination value collecting module 320 .

Accordingly, the control device 500 stores and manages the inclination value of the structure corresponding to the identification information, and according to the difference value of the inclination value corresponding to the structure transmitted from the transmission module 330, caution, warning, and danger, etc. It is configured to output a step-by-step state through the monitoring device 100 .

In other words, the control device 500 compares the slope value transmitted from the transmission module 330 with the stored slope value in a state where the initial slope value for one solar string is stored, and the difference value is 1° or less. Caution when exceeding 1° and less than 2° Warning 1, when exceeding 2° and less than 3° Warning 2, when exceeding 3° and less than 4° Warning 3, when exceeding 4° It is determined by subdividing into dangerous situations, and configured to display each determined situation on the monitoring device 100 .

The slope detection device 300 may be uniformly disposed throughout the photovoltaic power plant to detect ground fluctuations in the entire area, but may be arranged by selecting a vulnerable area and focusing on the selected vulnerable area.

In addition, the tilt detection device 300 may be installed corresponding to each solar string 11, or a panel and an array, and when installed corresponding to the solar string 11, or a panel and a solar array) , The identification information may further include ID information for distinguishing a solar string (or panel and array) as well as ID and location information of the structure.

According to the inclination detection device 300, since it is possible to detect the degree of inclination of the structure, based on the output inclination value, the degree of variation of the solar string 11 or the panel and the array, the range of tectonic variation, etc. are quickly detected. There are advantages to doing.

The drone 400 transmits an image captured while flying over the upper part of the solar array 10 , and may include a main body, a driving unit, a position measuring unit, a camera unit, a communication unit, a storage unit, and a control unit.

The driving unit may include a motor, a propeller, etc. related to flight driving of the drone 400, and is driven under the control of the control unit to make the drone 400 fly in the direction and altitude intended by the control unit.

In addition, the position measuring unit may be configured as a Real Time Kinematic Global Positioning System (RTK GPS) module in addition to the general GPS module.

The RTK GPS module measures the current position of the drone 400 in real time, and provides very precise position information with a position error within 5 cm.

The camera unit may be installed (or mounted) on the outer part of the body, and may include a visible light camera generating a visible light image (general image) composed of RGB and a thermal imaging camera generating a thermal image.

In this case, the visible light camera may be installed in the drone to have a photographing angle perpendicular to the ground. In addition, in order to accurately photograph the surface of the solar string disposed obliquely with respect to the ground, the thermal imaging camera uses the drone at a predetermined photographing angle different from the photographing angle of the visible light camera to face the surface of the solar string. can be configured in

Also, the camera unit may perform a photographing function for a specific area under the control of the controller, and may provide a visible light image (general image) and a thermal image generated by photographing to the control device 500 .

The communication unit includes photographing information including a visible light image (general image) and a thermal image captured through the camera unit under the control of the control unit and location information, and an angle for each of the visible light camera and thermal imager constituting the camera unit. The information is transmitted to the control device 500 .

Here, the angle information includes a PTZ (PAN/TILT/ZOOM) value of at least one of a visible light camera and a thermal imaging camera included in the camera unit.

The storage unit stores and manages an application program (or application) for driving the drone, data for operation of the drone, and shooting information captured by the camera unit.

The control device 500 determines whether the solar power plant is abnormal based on information transmitted from the monitoring device 100 , the string monitoring device 200 , the tilt detection device 300 , and the drone 400 , and the determined information Based on this, it performs the function of calculating information on maintenance and management.

Here, as information on maintenance and management, the generated power for each string, the slope value, the failure degree of the connection board and the inverter, the predicted amount of power generation, the shooting information taken by the drone, the power status, the power generation status, etc. are included, and the control The device 500 collects the transmitted information to determine whether there is an abnormality in the photovoltaic power plant and monitors it, and when it is determined that an abnormality occurs, each equipment, parts, and manpower required for restoration based on information on maintenance and management, etc. is provided to calculate

In addition, rainfall and snowfall are the main causes of changes in the slope of the structure.

Accordingly, the control device 500 configures a rainfall sensor and a snow sensor adjacent to the solar array (or in a solar power plant), and based on the rainfall and snow values detected from the rainfall sensor and the snow sensor, the solar It may be configured to promote safety management of the optical power plant.

In addition, each rainfall value and snowfall value detected from the rainfall sensor and the snowfall sensor may be subdivided into steps.

For example, the control device 500 is normal when the rainfall value detected by the rainfall sensor is 10 mm or less per hour, caution when it exceeds 10 mm per hour and is 25 mm or less, When it exceeds 25 mm per hour and is 50 mm or less In case of exceeding the boundary of 50 mm per hour, it may be configured to be subdivided into danger.

In addition, if the snowfall value detected by the snow sensor exceeds 20cm of accumulated daily and is less than 30cm, it is cautioned, when the accumulated daily exceeds 30cm and is less than 50cm, it is a boundary, and if it exceeds 50cm of accumulated daily, it is classified as danger. can be displayed as

In this configuration, the control device 500 is configured to output a message or a guide to check the situation around the photovoltaic power plant with interest in the case where it is determined to be caution is output through the monitoring device.

In addition, when the control device 500 is determined to be a boundary, a message or a guide to confirm the movement of important goods in the solar power plant, equipment status check, inspection/repair of vulnerable areas, etc. is output through the monitoring device, and , for a case that is determined to be dangerous, a message or guidance requesting the overall inspection and repair of the solar power plant is configured to be output through the monitoring device.

As described above, the control device 500 according to the present invention monitors and records the state monitoring of the solar string through the string monitoring device 200 in real time, and when an abnormality is found, an abnormality notification and alarm are issued through real-time monitoring. It is provided by determining whether the abnormal occurrence is a temporary abnormality or a continuous abnormality.

In addition, when continuous confirmation is required, the control device 500 may be configured to analyze information with a margin of time, and if it is determined as a continuous abnormality as a result of monitoring, it may be configured to notify again that fault diagnosis is required. have.

In addition, when an abnormality occurs continuously, it is possible to check and determine whether there is an abnormality by first inspecting the abnormal string with the drone and then precisely inspecting only the abnormal module secondary.

Meanwhile, solar panels are exposed to adverse conditions such as rain, wind, dust, and snow.

Accordingly, the surface of the solar panel may be contaminated by dust (fine dust), foreign matter, pollen, pine pollen, etc., and there is a high possibility of being damaged by an object flying by the wind. A shading may occur in which the panel surface is obscured. It is natural that the power generation efficiency is lowered by these adverse conditions.

Among these, adhesive contamination, where dust is attached to the surface of the solar panel, varies in degree depending on the geographical location where the solar power plant is installed (eg, a pine cluster area) and the surrounding environment (eg, a factory), but the use time has elapsed. The more it becomes, the more severe it becomes.

Accordingly, in the present invention, a configuration for detecting surface contamination of a solar panel with a drone is further included.

8 is a side cross-sectional view illustrating an embodiment for detecting pollution information of a solar panel by being applied to the operation/management system of a solar power plant according to the present invention.

Referring to FIG. 8, the solar panel 15 includes a light source 12 disposed inside the solar panel 15 and outputting colored light by an applied power source, and disposed in front of the light source. It is configured to further include a transparent film 13 that is parallel to the solar string.

Here, the light source 12 may be made of red or green, and when the light source 12 is replaced with white light according to design conditions, the transparent film 13 may be replaced with a colored film.

In addition, the light source 12 is not always turned on, but is turned on according to the start of the flight of the drone 400 and is preferably configured to be turned off in accordance with the end of the flight of the drone, more preferably, the light source 12 is the sun It may be composed of an LED using power produced by a photovoltaic power plant.

The drone 400 takes a photo of the photovoltaic array while flying over the photovoltaic array 10 , and transmits the captured images (visible light image and thermal image) to the control device 500 .

Accordingly, the image transmitted from the drone 400 includes a colored dot image irradiated from the light source 12, and the control device 500 determines the surface of the solar panel based on the size and color density of the dot image. contamination can be detected.

For example, if the pollution degree of the sun and the surface of the panel is increased, the pollution degree of the surface of the transparent film is also increased, so the color density of the light source emitted through the transparent film is lowered, and the size of the dot image is caused by light scattering by the contaminants. will be increased

At this time, the density and size of the colored dot image in the image photographed by the drone 400 is affected by the distance between the drone and the solar panel, the photographing angle, the photographing location, and the surrounding illuminance during photographing.

Therefore, the size and color density of the basic dot image set as a comparison target is made based on the drone's altitude, orientation, shooting time, and illuminance in a state where the pollution level of the solar panel is low, and the image taken to detect the pollution level is also compared. It should be done under the same conditions as those for detecting the basic point image set as the target.

As such, with the above configuration, it is possible to detect contamination information on the surface of a solar panel through an image captured by a drone flight, and to establish a maintenance plan for maintenance and management according to the detected contamination information. have.

Next, a method for operating/managing a solar power plant according to an embodiment of the present invention will be described.

The present invention specifies a solar string in which an abnormality has occurred through a string monitoring device, and when it is determined that the specified solar string continuously generates an abnormal signal, a photovoltaic string in which an abnormality has occurred is photographed using a drone By doing so, it is related to a technology that allows a quick response through a quick inspection.

Accordingly, in the case of a small-scale solar power plant, real-time monitoring is performed in connection with a monitoring device, a string monitoring device, and a fault diagnosis system, and in the case of a large-scale solar power plant, hundreds of solar strings are monitored by a monitoring device, a string monitoring device and Real-time monitoring is performed in conjunction with the fault diagnosis system.

When an abnormal string is generated in a state in which real-time monitoring is performed, it is determined whether the phenomenon is a temporary phenomenon or a continuous phenomenon with a time margin.

If it is a temporary phenomenon, the abnormal signal returns to normal and the output of the abnormal signal is stopped. However, the continuous phenomenon may be classified into a string to be inspected and checked.

The first and second inspections are performed using a drone for the solar string in which the abnormal signal is generated.

The first inspection is a partial inspection of the solar string in which the abnormality has occurred, and a visual or physical inspection of the solar string is performed. For example, by using a drone to photograph the vicinity of the solar string whether there is an abnormality, the external appearance of the solar string is checked.

The second inspection consists of a detailed inspection. The drone will closely photograph the solar panel.

When the inspection using the drone is completed, it is decided whether to put manpower and equipment.

As such, the present invention can determine whether a failure exists while monitoring a solar string in connection with a monitoring device, a string monitoring device, and a fault diagnosis system as well as a slope detection device, so that an abnormal area can be quickly searched for in a large-scale solar power plant. It has the advantage of being able to easily check the solar string to be inspected with the naked eye.

That is, as in the present invention, when inspecting a solar power plant using a drone, it is possible to easily inspect a large site of a large-scale solar power plant and a photovoltaic power plant that is not easy to access, and the drone's driver light (general) shooting And it is possible to diagnose the presence or absence of abnormalities in the solar power plant more precisely than the conventional general visual diagnosis through the thermal imaging camera.

In addition, when using a drone-based thermal imaging camera, the inspection area is wider compared to a handheld thermal imaging camera, and it is possible to measure uniformly and uniformly, thereby reducing errors and errors relatively.

In addition, if the fault detection location is confirmed with string monitoring diagnosis, the drone can quickly and easily access the fault location location, thereby minimizing the input of manpower.

In addition, since the error in determining the presence or absence of a malfunction, which is a disadvantage of string monitoring diagnosis, can be compensated through drone shooting, the string monitoring device and the drone can exert a synergistic effect.

In addition, it is possible to quickly diagnose a fault, and it is easy to reduce errors and analyze the presence or absence of a fault through the drone.

9 is a flowchart showing a method for operating / managing a solar power plant according to the present invention.

9, the operation / management method of the photovoltaic power plant according to the present invention includes an information receiving step (S10), an abnormality determination step (S20), a continuation determination step (S30), an image receiving step (S40) and equipment/manpower calculation step (S50).

1. Information receiving step (S10)

The information receiving step (S10) is information detected from the monitoring device 100 for detecting the state of the inverter, the string monitoring device 200 for detecting the state of the solar string, and the tilt detecting device 300 for detecting the inclination of the structure. step to receive.

The monitoring device, the string monitoring device, and the inclination detection device may be operated periodically, aperiodically (operated by user manipulation) or in real time, and the control device 500 detects according to the operation of the monitoring device and the string detection device receive information

Here, the detection information includes the result value output from the power control unit, the generation amount prediction unit, the fault diagnosis unit and the generation status calculation unit, the production power of the solar string, the slope value of the structure, the rainfall value, the snowfall value, and the like.

2. Abnormality determination step (S20)

The abnormality determination step (S20) is a step of determining whether the solar power plant is abnormal based on the information received in the information receiving step (S10).

That is, the abnormality determination step (S20) is to determine whether there is an abnormality in the control device 500 based on the detection information transmitted from the monitoring device and the string detection device, and a step for abnormal factors (caution, warning). , risk) to determine whether there is an abnormality.

3. Continuation determination step (S30)

The continuation determination step (S30) is a step of determining whether a temporary phenomenon or a continuous phenomenon occurs when it is determined that an abnormality has occurred as a result of the determination of the abnormality determination step (S20).

At this time, the continuation determination step (S30) is related to time. That is, some abnormal operations may return to normal over time.

Accordingly, in the continuation determination step (S30), it is determined whether the abnormality is continued according to information values accumulated over a predetermined time.

4. Image receiving step (S40)

In the image receiving step (S40), if it is determined as a continuous phenomenon as a result of the determination of the continuation determination step (S30), the image (visible light image and heat image) and receiving the captured image.

5. Equipment / manpower calculation step (S50)

The equipment/manpower calculation step ( S50 ) is a step of calculating equipment and manpower for maintenance/management based on the captured image received in the image receiving step ( S40 ).

That is, the equipment / manpower calculation step (S50) is information input through the control device 500, for example, the degree of inclination of the structure, the number of inclined structures, the number of solar strings in which power is not produced or insufficient, etc. is input, calculates and provides equipment, parts, and manpower corresponding to the received information.

According to the present invention, it is possible to specify an area where an abnormality has occurred in a large-capacity photovoltaic power plant through monitoring and string monitoring, so the time and manpower required for maintenance can be minimized. There are advantages in that the time required to check whether there is an abnormality is shortened, and it is possible to quickly detect the abnormality occurring area.

In addition, it is possible to improve the precision of the abnormality by determining whether it is a temporary error or a continuous error through the string monitoring device, and there is an advantage in that the amount of power generation can be increased through maintenance and management.

In addition, it is divided into a plurality of stages according to the degree and duration of the detected abnormality, and is configured to take appropriate measures for each divided stage, so there is an advantage that maintenance/management can be performed in consideration of the precedence of occurrence of abnormality. .

In the above, a preferred embodiment of a solar power plant operation/management system and method according to the present invention has been described, but the present invention is not limited thereto, and various It is possible to carry out modification with the branch, and this also falls within the scope of the present invention.

10: solar array 11: solar string
20: connection panel 30: inverter
40: transformer 50: filter
100: monitoring device 110: power control unit
120: power generation forecasting unit 130: fault diagnosis unit
140: power generation status calculation unit 150: output unit
200: string monitoring device 300: tilt detection device
400: drone 500: control unit

Claims (6)

A photovoltaic array to which a plurality of photovoltaic strings are connected, a connecting panel for collecting DC power produced from the photovoltaic array by connecting them in series or in parallel, converting the DC power output from the connecting panel into AC power and supplying it to the grid In a solar power plant including an inverter,
a monitoring device for detecting the state of the inverter;
String monitoring device for monitoring the state of the solar string;
a tilt detection device for detecting a tilt of a structure in which a solar panel is installed;
a drone device that transmits an image captured while flying over the upper part of the solar array; and
a control device for determining whether the solar power plant is abnormal based on information transmitted from the monitoring device, the string detecting device, the inclination detecting device, and the drone device, and calculating information on maintenance and management based on the determined information;
Operation / management system of a solar power plant, characterized in that it comprises a.
The method according to claim 1,
The monitoring device is
a power control unit that detects and manages the amount of electricity generated by the solar array and the power situation of the system;
a power generation forecasting unit for calculating a predicted power generation amount based on the altitude of the sun, the amount of incident light of the sun, temperature, and humidity;
a fault diagnosis unit for diagnosing whether the solar string, the connection panel and the inverter are faulty;
a power generation status calculation unit for calculating statistical information on the amount of electricity produced by the connection panel; and
a monitoring unit for displaying the result values output from the power control unit, the generation amount prediction unit, the fault diagnosis unit, and the generation status calculation unit;
Operation / management system of a solar power plant, characterized in that it comprises a.
The method according to claim 1,
The solar string monitoring device,
A photovoltaic power plant, characterized in that continuously monitoring each power value for the incoming power line connected to the photovoltaic string, and accumulating or comparing and analyzing the monitored power value to monitor the power produced by each photovoltaic string 's operation/management system.
The method according to claim 1,
The tilt detection device,
a plurality of inclination sensor modules installed in a structure supporting the solar panel;
a gradient value collecting module for collecting gradient values output from the plurality of inclination sensor modules; and
a transmission module for combining identification numbers of solar strings or panels and arrays corresponding to the slope values output from the slope value collecting module and transmitting them to the control device;
Operation / management system of a solar power plant, characterized in that it comprises a.
The method according to claim 1,
In the solar panel,
a light source disposed inside the solar panel to output colored light by an applied power; and
a transparent film disposed in front of the light source module and formed horizontally with the solar string;
Consists of further comprising,
The control device is
The operation/management system of a solar power plant, characterized in that the surface contamination information of the solar panel is detected based on the color density and size of the light source output from the light source module in the image captured by the drone.
A photovoltaic array to which a plurality of photovoltaic strings are connected, a connecting panel for collecting DC power produced from the photovoltaic array by connecting them in series or in parallel, converting the DC power output from the connecting panel into AC power and supplying it to the grid In the operation / management method of a solar power plant including an inverter,
an information receiving step of receiving information detected from a monitoring device for detecting the state of the inverter and a string detecting device for detecting the state of the solar string;
an abnormality determination step of determining whether the solar power plant is abnormal based on the information received in the information receiving step;
If it is determined that an abnormality has occurred as a result of the determination of the abnormality determination step, a continuation determination step of determining whether a temporary phenomenon or a continuous phenomenon has occurred;
When it is determined that the continuous phenomenon is a continuous phenomenon as a result of the determination of the continuity determination step, an image receiving step of photographing an image of a solar string in which abnormality is generated through a drone device, and receiving the photographed image; and
an equipment/manpower calculation step of calculating equipment and manpower for maintenance/management based on the captured image received in the image receiving step;
Operation / management method of a solar power plant, characterized in that it comprises a.

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