KR101541488B1 - Efficiency analysis system for solar photovoltaic power facilities - Google Patents

Abstract

One embodiment of the present invention provides a meteorological station-provided weather information collecting unit for collecting meteorological information including a solar radiation value and a maximum temperature at one or more meteorological observation points provided by a weather station. A weather station information calculation unit for calculating weather information including a solar radiation value and a maximum temperature of a specific solar power plant based on the weather information collected by the meteorological station-provided weather information collection unit; A solar power plant maximum power generation amount calculation unit for calculating a maximum power generation amount of the solar power generation plant based on the solar radiation value and the maximum temperature of the specific solar power plant calculated by the solar power plant meteorological information calculation unit; And a power generation efficiency calculator for calculating a power generation efficiency of the solar power generation plant from the maximum power generation amount of the solar power generation plant calculated by the maximum power generation amount calculation unit of the solar power generation plant and the actual power generation amount received by the solar power generation plant, Efficiency analysis system.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an efficiency analysis system for a solar power plant,

The present invention relates to a system and method for analyzing power generation efficiency of a solar power plant using design information of a weather station database and a solar power plant without installing a separate weather observation equipment.

Generally, the method of using solar energy is divided into a method using solar heat and a method using sunlight. The method of using solar heat is a method of heating and generating electricity by using water heated by the sun, and a method of using sunlight is a method of generating electricity by using sunlight, It is called solar power generation.

Among the above-mentioned methods, photovoltaic power generation is a photovoltaic effect in which a photovoltaic panel having n-type doping on a silicon crystal and pn-junction is irradiated with sunlight to generate an electromotive force due to the photovoltaic energy, To generate electricity.

For this purpose, a solar cell for collecting sunlight, a photovoltaic module as an aggregate of solar cells, and a solar array for uniformly arranging solar cells are required.

For example, when light enters the solar module from the outside, the electrons in the conduction band of the p-type semiconductor are excited into the valance band by the incident light energy, One electron-hole pair (EHP) is formed in the p-type semiconductor. The electrons in the electron-hole pair are generated by an electron field existing between the p- And the current is supplied to the outside.

Unlike existing energy sources such as fossil raw materials, sunlight is a clean energy source that does not have the danger of global warming, such as greenhouse gas emissions, noise, environmental destruction, etc., and there is no fear of depletion. Unlike other types of wind and seawater, solar power generation facilities are free from installation and maintenance costs.

The above-described background technology is technical information that the inventor holds for the derivation of the present invention or acquired in the process of deriving the present invention, and can not necessarily be a known technology disclosed to the general public prior to the filing of the present invention.

Embodiments of the present invention aim to provide a system and method for analyzing power generation efficiency of a solar power plant utilizing design information of a weather station database and a solar power plant without installing a separate weather observation equipment.

One embodiment of the present invention provides a meteorological station-provided weather information collecting unit for collecting meteorological information including a solar radiation value and a maximum temperature at one or more meteorological observation points provided by a weather station. A weather station information calculation unit for calculating weather information including a solar radiation value and a maximum temperature of a specific solar power plant based on the weather information collected by the meteorological station-provided weather information collection unit; A solar power plant maximum power generation amount calculation unit for calculating a maximum power generation amount of the solar power generation plant based on the solar radiation value and the maximum temperature of the specific solar power plant calculated by the solar power plant meteorological information calculation unit; And a power generation efficiency calculator for calculating a power generation efficiency of the solar power generation plant from the maximum power generation amount of the solar power generation plant calculated by the maximum power generation amount calculation unit of the solar power generation plant and the actual power generation amount received by the solar power generation plant, Efficiency analysis system.

In this embodiment, the solar-power-unit's weather-information calculation unit calculates the solar-radiation value and the maximum temperature of a specific solar power plant from the solar radiation value and the maximum temperature measured at one or more weather observation points around the specific solar power plant .

In the present embodiment, the solar power plant weather information calculation unit can calculate the solar radiation value and the maximum temperature of a specific solar power generation plant based on the weights of distances from the respective weather observation points to the specific solar power generation plant .

In the present embodiment, the maximum power generation amount computing unit of the solar power generation plant calculates, based on at least one of the total area of the solar cell module of the solar power generation plant, the module efficiency, the temperature coefficient of the module, the system efficiency, The maximum power generation amount of the solar power generation plant can be calculated.

Another embodiment of the present invention provides a method for monitoring weather information, comprising: collecting, by an application server, meteorological information including a solar radiation value and a maximum temperature at one or more meteorological observation points provided by a weather station; Calculating, by the application server, weather information including a solar radiation value and a maximum temperature of a specific solar power plant based on the collected weather information; Calculating, by an application server, a maximum power generation amount of the corresponding photovoltaic power generation station based on the solar radiation value and the maximum temperature of the calculated specific solar power generation plant; Calculating a power generation efficiency of the solar power generation plant by the application server from the calculated maximum power generation amount of the corresponding solar power generation plant and the actual power generation amount received by the solar power generation plant; .

In the present embodiment, the step of calculating the weather information of the solar power plant may include calculating a solar heat value of the solar power plant from the solar heat value measured at one or more weather observing points around the specific solar power plant, The temperature can be calculated.

In the present embodiment, the step of calculating the weather information of the solar power plant may include calculating the solar heat value and the maximum temperature of the specific solar power plant based on the weight of the distance from the respective weather observation point to the specific solar power plant Lt; / RTI >

In the present embodiment, the step of calculating the maximum power generation amount of the solar power generation plant is based on at least one of the total area of the solar cell module, the module efficiency, the temperature coefficient of the module, the system efficiency, And the maximum power generation amount of the solar power generation plant can be calculated.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

According to the embodiments of the present invention, it is possible to analyze power generation efficiency without installing expensive meteorological observation equipment in a solar power plant, thereby reducing installation cost. In addition, a new evaluation index can be provided on the problem that the solar power plant could not be evaluated as to the optimal generation of electricity per day, because the power generation is variable according to the weather. Furthermore, by calculating the appropriate generation amount using the solar radiation value, which is the energy source of the photovoltaic power generation, and comparing it with the actual generation amount, it is possible to predict the failure not found in the solar power generation plant, Effect can be obtained.

FIG. 1 is a diagram showing a configuration of a solar power plant efficiency analysis system according to an embodiment of the present invention.
2 is a block diagram showing the internal configuration of the application server of FIG.
3 is a diagram showing a data combination for power generation efficiency calculation.
FIG. 4 is a view showing a weather observation point providing a solar radiation (MJ / m 2) value at the present weather station.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods of achieving them will be apparent with reference to the embodiments described in detail below with reference to the drawings. However, the present invention is not limited to the embodiments described below, but may be implemented in various forms. In the following embodiments, the terms first, second, and the like are used for the purpose of distinguishing one element from another element, not the limitative meaning. Also, the singular expressions include plural expressions unless the context clearly dictates otherwise. Also, the terms include, including, etc. mean that there is a feature, or element, recited in the specification and does not preclude the possibility that one or more other features or components may be added. Also, in the drawings, for convenience of explanation, the components may be exaggerated or reduced in size. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to those shown in the drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or corresponding components throughout the drawings, and a duplicate description thereof will be omitted .

FIG. 1 is a diagram showing a configuration of a solar power plant efficiency analysis system according to an embodiment of the present invention.

Referring to FIG. 1, a solar power plant efficiency analysis system 1 according to an embodiment of the present invention includes a plurality of user terminals 400, a plurality of user terminals 400, A meteorology server 200 for providing meteorological information to the application server 100, the meteorology information including at least one solar radiation value at a meteorological observation point and a maximum temperature, A power plant server 300, a plurality of user terminals 400, an application server 100, a weather station server 200, and a power plant server 300 that provide power plant information of a solar power plant and generation amount of the solar power plant, And a communication network 500 for connection.

A plurality of user terminals 400 means a communication terminal that can use a web service in a wired / wireless communication environment. Here, the user terminal 400 may be the user's personal computer 401 or the user's portable terminal 402. Although the portable terminal 402 is shown as a smart phone in FIG. 1, the present invention is not limited thereto, and a terminal equipped with an application capable of web browsing as described above can be borrowed without limitation.

On the other hand, the weather station server 200 means a server that provides weather information including a solar radiation value and a maximum temperature at one or more weather observation stations. The power plant server 300 refers to a server that provides power plant information of a solar power plant and an amount of power generated by the solar power plant.

On the other hand, the application server 100 collects meteorological information including a solar radiation value and a maximum temperature at one or more meteorological observing points provided by the meteorological office, and based on this information, the meteorological information including a solar radiation value and a maximum temperature And calculates the maximum power generation amount of the solar power generation plant based on the solar radiation value and the maximum temperature of the specific solar power plant calculated. Based on the calculated maximum power generation amount of the solar power generation plant and the actual power generation amount received from the solar power generation plant , And calculates the power generation efficiency of the solar power plant.

The communication network 500 connects the user terminals 400 with the application server 100, the weather station server 200, and the power plant server 300. That is, the communication network 500 refers to a communication network that provides a connection path so that the application server 100 can connect to the weather station server 200 and the power plant server 300 and then transmit and receive packet data.

Hereinafter, this will be described in more detail.

2 is a block diagram showing the internal configuration of the application server of FIG.

2, the application server 100 of the solar power plant efficiency analysis system 1 according to an embodiment of the present invention includes an interface unit 110, a meteorological office-provided weather information collecting unit 120, An information calculation unit 130, a solar power generation site maximum power generation amount calculation unit 140, a power generation efficiency calculation unit 150, and a database 160.

The interface unit 110 is connected to the communication network 500 to provide the transmission and reception signals between the application server 100, the weather station server 200, the power plant server 300, and the user terminals 400 in the form of packet data Communication interface.

The meteorological station-provided weather information collection unit 120 collects meteorological information including a solar radiation value and a maximum temperature at one or more meteorological observation points provided by the meteorological office.

The solar power plant weather information calculation unit 130 calculates weather information including a solar radiation value and a maximum temperature of a specific solar power plant on the basis of the weather information collected by the weather information providing apparatus 120.

The solar power plant maximum power generation amount calculation unit 140 calculates the maximum power generation amount of the solar power generation plant based on the solar energy value and the maximum temperature of the specific solar power plant calculated by the solar power plant weather information calculation unit 130 .

The power generation efficiency calculation unit 150 calculates the power generation efficiency of the solar power generation plant from the maximum power generation amount of the corresponding solar power generation plant calculated by the maximum power generation amount calculation unit 140 of the solar power generation plant and the actual power generation amount received from the corresponding solar power generation plant .

The database 160 stores meteorological information and solar power plant information. Referring to FIG. 3, which shows a data combination for power generation efficiency calculation, meteorological information stored in the database 160 may include a solar radiation value at a weather observation point, a maximum temperature, and GPS information of a weather observation point. Meanwhile, the solar power plant information stored in the database 160 may include the GPS information of the power plant, the total area of the module, the module efficiency, the temperature coefficient of the module, the system efficiency, and the solar tracking method.

Here, the solar power plant efficiency analysis system 1 according to an embodiment of the present invention is a system for analyzing the efficiency of a solar power plant, including design information of a solar power plant, weather information (solar radiation value, maximum temperature) The present invention is characterized by analyzing the power generation efficiency of a solar power plant without installing a separate meteorological observation device in the solar power plant. In other words, for the power generation efficiency evaluation, it is possible to utilize the weather information provided by the Korea Meteorological Administration without installing expensive meteorological observation equipment in the solar power plant, and utilize the GPS coordinates of the solar power plant and the GPS coordinates of the weather observation point providing information And estimates the weather information.

Hereinafter, this will be described in more detail.

The solar power plant efficiency analysis system 1 according to an embodiment of the present invention performs functions in the order of collecting meteorological information provided by the meteorological office, estimating the meteorological information of the photovoltaic power station based on the location information, calculating the maximum power generation amount, and calculating the power generation efficiency . Each function should be performed sequentially. The first Meteorological Agency information collection function can be performed after information is released on the Meteorological Agency site. Generally, the Meteorological Agency releases the accumulated solar day (MJ / ㎡) value and the maximum daily temperature between 0:00 am and 1:00 am, so the time to analyze power generation efficiency is between 1:00 am and 5:00 am will be.

First, the meteorological station-provided weather information collecting unit 120 collects meteorological information including a solar radiation value and a maximum temperature at one or more meteorological observation points provided by the meteorological office. In detail, the meteorological information provided by the weather station includes the solar radiation value at the individual weather observation point, the maximum temperature and the GPS coordinate information of the weather observation point. Here, the solar radiation value (MJ / m 2) and the maximum temperature (캜) can be provided on a daily basis. Figure 4 shows a meteorological observation point providing the value of solar radiation (MJ / m2) at the present weather station. In addition, the Meteorological Agency can provide names and GPS coordinates information, names, and addresses of 35 meteorological stations that provide and measure solar radiation (MJ / ㎡).

Next, the solar power plant meteorological information calculation unit 130 calculates the meteorological information including the solar heat value and the maximum temperature of the specific solar power plant based on the meteorological information collected by the meteorological station-provided meteorological information collection unit 120 . For this purpose, the solar radiation value and the maximum temperature of the solar power plant are calculated using the location information of the weather observation point and the location information of the solar power plant.

In detail, to utilize the meteorological information provided by the Korea Meteorological Agency, the GPS coordinates of the solar power plant are compared with the GPS coordinates of the meteorological observation point, and the distance and direction are calculated to select one to four weather observation points around the solar power plant. The meteorological observation point selected at this time is the meteorological observation point in the upper left, lower left, upper right, and lower right around the solar power plant. At this time, the distance between GPS signals can be generally calculated using a Haversine formula.

Next we calculate the weights of the four selected weather observation points. The method of calculating the weight is as follows.

X = (distance total / distance from upper left) + (distance from total / upper right) +

    (Distance from total / bottom left) + (distance from total / distance from bottom)

Weight of upper left = (distance sum / distance from upper left) / X

Weight of bottom left = (distance sum / distance from right top) / X

Weight of the upper right corner = (distance total / distance from left lower) / X

Weight of lower right = (distance / distance from right / X) / X

Solar radiation value of solar power plant = solar radiation value of upper left point * weight of upper left point +

                          Lower left solar value * lower left weight +

                          The value of the idol of the idol * the weight of the idol +

                          Lower value of the lower right * Weight of the lower right

In the same way, you can calculate the maximum temperature of a solar power plant.

The solar power plant maximum power generation amount calculation unit 140 calculates the maximum power generation amount of the solar power generation plant based on the solar energy value and the maximum temperature of the specific solar power plant calculated by the solar power plant weather information calculation unit 130 .

First, the factors affecting solar power generation are as follows.

Table 1 below shows the factors affecting solar power generation.

division unit Remarks Solar cell
module area ㎡ The width and length of the module Module efficiency
(Maximum output) % Module efficiency = maximum output ÷ (area × 1000W) × 100 Thermometer number % / ℃ Generally 0.4% / ° C Solar tracking
Solar radiation weight % Fix: 100.0% Fixed variable: 104.9% Bilateral tracking: 125.6% Slope shortening: 122.1% Horizontal shortening: 111.8% Weather information Irradiation amount kW / ㎡ 1M / m2 = 0.27778kW / m2 Module temperature ℃ Generally, temperature + 20 ℃

The most important information for calculation of the maximum power generation amount of solar power generation system is the specification of solar cell module. The specifications of the solar cell module may include area, module efficiency, and temperature coefficient. Here, the module efficiency is the maximum amount of power that can be produced relative to the area of the module. If a module with an area of 1 square meter receives 1,000W / m2 of solar light and produces 150W, the efficiency of the module is 15%. On the other hand, the crystalline silicon solar cell, which is currently used most frequently, has a characteristic that the performance per 1 ° C drops by 0.4% when the module temperature rises. This is called the temperature coefficient of the module.

There is also a significant impact on power generation, depending on how the power system tracks the sun. The value of solar radiation (MJ / ㎡) provided by the Korea Meteorological Administration is a cumulative value of 1m2 on a fixed horizontal plane.

The information of each solar power plant may be stored in the database 160 in advance. Or the application server 100 may request and receive power station server 300 whenever necessary.

The process of calculating the maximum power generation amount of the solar power generation plant based on the information of the solar power plant stored in the database 160 and the solar radiation value and the maximum temperature of the solar power plant calculated by the solar power plant weather information calculation unit 130 As follows.

① Solar power generation (kW / ㎡) = solar power generation solar power (MJ / ㎡) x 0.27778

(2) Total solar irradiance received by the module (kW) = solar irradiance of the solar power plant (kW / ㎡) × total area of the module (㎡)

③ Maximum production power (kW) = Total solar radiation received by module (kW) × Module efficiency (%)

④ Module temperature (℃) = Maximum temperature of solar power plant (℃) + 20 (℃)

⑤ Module temperature effect (%) = (1- (Module temperature (℃) -25) × Module temperature coefficient (%)) × 100

⑥ Solar irradiation weight according to solar tracking method (%) =

   (Fixed capacity ÷ total capacity × fixed weight) +

   (Fixed variable capacity ÷ total capacity × fixed variable weight) +

   (Biaxial tracking capacity ÷ total capacity × biaxial tracking weight) +

   (Slope shortening capacity ÷ total capacity × slope shortening weight) +

   (Horizontal shortening capacity ÷ total capacity × horizontal shortening weight)

(Where fixed = 100.0%, fixed variable = 104.9%, biaxial tracking = 125.6%, slope shortening = 122.1%, horizontal shortening = 111.8%

⑦ System efficiency (%) = 100.0%

⑧ Maximum power generation (kW) = Maximum production power using module efficiency (kW) × Temperature effect of module (%) × Weight of solar irradiation according to solar tracking system × System efficiency (%)

Finally, the power generation efficiency calculation unit 150 calculates the power generation efficiency of the corresponding solar power generation plant from the maximum power generation amount of the corresponding solar power generation plant calculated by the maximum power generation operation unit 140 of the solar power generation plant and the actual power generation amount received by the corresponding solar power generation plant .

The power generation efficiency of a solar power plant can be calculated by the following formula.

Power generation efficiency (%) = Total power generation per day (kW) / Maximum power generation (kW) * 100

According to the embodiments of the present invention, it is possible to analyze power generation efficiency without installing expensive meteorological observation equipment in a solar power plant, thereby reducing installation cost. In addition, a new evaluation index can be provided on the problem that the solar power plant could not be evaluated as to the optimal generation of electricity per day, because the power generation is variable according to the weather. Furthermore, by calculating the appropriate generation amount using the solar radiation value, which is the energy source of the photovoltaic power generation, and comparing it with the actual generation amount, it is possible to predict the failure not found in the solar power generation plant, Effect can be obtained.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the exemplary embodiments, and that various changes and modifications may be made therein without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

1: Solar power plant efficiency analysis system
100: Application server
110:
120: Meteorological Agency-provided weather information collection unit
130: Solar power plant weather information computing unit
140: Solar power plant maximum power generation operating unit
150: Power generation efficiency calculating section
160: Database
200: weather station server
300: Power plant server
400: User terminal
500: Network

Claims (8)

A meteorological station-provided weather information collecting unit for collecting meteorological information including a solar radiation value and a maximum temperature at one or more meteorological observation points provided by the meteorological office;
A weather station information calculation unit for calculating weather information including a solar radiation value and a maximum temperature of a specific solar power plant based on the weather information collected by the meteorological station-provided weather information collection unit;
A solar power plant maximum power generation amount calculation unit for calculating a maximum power generation amount of the solar power generation plant based on the solar radiation value and the maximum temperature of the specific solar power plant calculated by the solar power plant meteorological information calculation unit;
And a power generation efficiency calculator for calculating a power generation efficiency of the solar power generation plant from the maximum power generation amount of the solar power generation plant calculated by the maximum power generation amount calculation unit of the solar power generation plant and the actual power generation amount received by the solar power generation plant,
The solar power plant meteorological information computing unit includes:
Wherein a solar radiation value and a maximum temperature of a specific photovoltaic power generation plant are calculated based on a weight of a distance from one or more meteorological observation points around the specific photovoltaic power generation plant to the specific photovoltaic power generation plant. The method according to claim 1,
The solar power plant meteorological information computing unit includes:
Wherein a solar radiation value and a maximum temperature of a specific solar power generation plant are calculated from the solar radiation value and the maximum temperature measured at the one or more weather observation points. delete The method according to claim 1,
The solar power plant maximum power generation amount calculation unit calculates,
Characterized in that the maximum power generation amount of the solar power generation plant is calculated based on at least one of the total area of the solar cell module of the solar power generation plant, the module efficiency, the temperature coefficient of the module, the system efficiency, Power Plant Efficiency Analysis System. The application server collecting meteorological information including a solar radiation value and a maximum temperature at one or more meteorological observation points provided by the weather station;
Calculating, by the application server, weather information including a solar radiation value and a maximum temperature of a specific solar power plant based on the collected weather information;
Calculating, by an application server, a maximum power generation amount of the corresponding photovoltaic power generation station based on the solar radiation value and the maximum temperature of the calculated specific solar power generation plant;
Calculating by the application server the power generation efficiency of the corresponding photovoltaic power generation plant from the calculated maximum power generation amount of the corresponding photovoltaic power generation plant and the actual power generation amount received by the photovoltaic power generation plant;
Wherein the step of calculating the weather information of the solar power plant comprises:
Wherein a solar radiation value and a maximum temperature of a specific photovoltaic power generation plant are calculated based on a weight of a distance from one or more meteorological observation points around the specific photovoltaic power generation plant to the specific photovoltaic power generation plant. 6. The method of claim 5,
Wherein the step of calculating the weather information of the solar power plant comprises:
Wherein the solar radiation value and the maximum temperature of the specific solar power plant are calculated from the solar radiation value and the maximum temperature measured at the one or more weather observation points. delete 6. The method of claim 5,
The step of calculating the maximum power generation amount of the photovoltaic power generation plant includes:
Characterized in that the maximum power generation amount of the solar power generation plant is calculated based on at least one of the total area of the solar cell module of the solar power generation plant, the module efficiency, the temperature coefficient of the module, the system efficiency, Method of power plant efficiency analysis.

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