KR100909978B1 - Output calibration and performance verification device for photovoltaic power generation system and method - Google Patents

Abstract

The present invention relates to an apparatus for correcting output and verifying performance of a photovoltaic system and a method thereof, and more particularly, to temperature and solar radiation characteristics suggested by a solar cell manufacturer at an output measured under natural conditions at an installation site of a photovoltaic system. Apparatus and method for output calibration and performance verification of photovoltaic power generation system which can easily determine whether the corrected output meets the specifications suggested by the manufacturer by calculating the correction output by applying the correction coefficient extracted from the curve. .

PV system, temperature, solar radiation, calibration, performance verification

Description

Device for Power Compensation and Performance Verification of Photovoltaic System and its Method {Device For Power Compensation And Performance Verification Of Photovoltaic Generation System And Methode Thereof}

The present invention relates to an apparatus for correcting output and verifying performance of a photovoltaic system and a method thereof, and more particularly, to temperature and solar radiation characteristics suggested by a solar cell manufacturer at an output measured under natural conditions at an installation site of a photovoltaic system. Apparatus and method for output calibration and performance verification of photovoltaic power generation system which can easily determine whether the corrected output meets the specifications suggested by the manufacturer by calculating the correction output by applying the correction coefficient extracted from the curve. .

In the existing power generation system, such as thermal power and nuclear power, the output varies according to the amount of fuel supplied, so the system is configured to control the power artificially, so there is no need to verify the output of the power generation system.

However, in the case of the photovoltaic power generation system, since power is generated according to the amount of insolation, the power generation of the photovoltaic power generation system varies from time to time according to sunlight, insolation conditions (insolation, temperature).

The output specification suggested by the manufacturer for the solar cell shows the output value obtained under standard test conditions at the time of manufacture (for example, STC, Air Mass 1.5, solar radiation amount 1000 [W / ㎡], surface temperature 25 ℃), Due to the characteristics of the photovoltaic power generation system, the characteristics of the actual operating conditions of the site where the solar cell is installed have a problem that it is difficult to accurately verify the output because the output changes from time to time because the solar conditions change every moment.

According to the characteristics of the photovoltaic power generation system as described above, it is a method for confirming whether the solar power generation system is installed and output according to the specification suggested by the manufacturer. Whether the system is satisfied by measuring the total output at the final connection point between the photovoltaic system and the KEPCO system installed between 12 and 2 pm during the good daytime and judging whether it is satisfied with the system's total output by the average value. The method of determining the power consumption and the average power at the final connection point between the photovoltaic system and the KEPCO system during the first year after installation are used.

However, the output checking method as described above not only takes a considerable amount of time, but also has a problem in that the accuracy of output verification is inferior because the output cannot be accurately confirmed by fully reflecting the solar radiation condition that changes in real time.

Therefore, it is very urgent to develop an output verification system capable of real-time checking whether a photovoltaic power generation system has a rated output under solar radiation conditions changing in real time.

In order to solve the above problems, an object of the present invention is to correct the value according to the solar conditions in the actual operating conditions of the field in which the output value of the solar cell obtained in the standard test conditions at the time of manufacture and the real-time solar conditions fluctuate An apparatus and method for verifying output of a photovoltaic power generation system capable of verifying the output of a photovoltaic power generation system by comparing the calculated output values are provided.

In order to achieve the above object, an output correction and performance verification apparatus of a photovoltaic power generation system according to the present invention includes a temperature sensor formed on a solar cell module and a temperature sensor configured to measure temperature, and an solar radiation sensor formed on the solar cell module to measure solar radiation. And an output verification device that verifies the performance of the photovoltaic power generation system corrected according to the temperature and the solar radiation value measured by the temperature sensor and the solar radiation sensor and confirms whether or not the standard output is met.

Here, the solar radiation sensor is a solar radiation meter for measuring the solar radiation of the solar cell module and the solar radiation meter is measured by accumulating the solar radiation meter at a predetermined time and the solar radiation measurement unit and Joule (J) unit to measure the solar radiation value in watts ( W) unit conversion unit characterized in that it comprises.

The solar radiation sensor is attached and fixed at the same angle as the solar cell module surface to measure the solar radiation incident on the solar cell module surface perpendicularly.

In addition, the output verification device is an interface module for receiving the measured value of the temperature sensor and the solar radiation sensor for calculating the corrected output, the output value of the rear end of the inverter of the photovoltaic system and display the output verification result and the solar radiation sensor and the temperature sensor A correction output calculation module for calculating a corrected output value using a voltage current characteristic curve according to a change in insolation amount and a value input from the solar radiation, and a correction output calculated from the correction output calculation module and actually measured And a memory for storing information necessary for calculating a corrected output of the corrected output calculating module and comparing the output value to determine whether the standard output is satisfied.

Here, the correction output calculation module is corrected from the following equation derived using the solar radiation value measured from the solar radiation sensor, the temperature value measured from the temperature sensor and the voltage current characteristic curve according to the change of the solar radiation and the voltage current characteristic curve according to the temperature change. It is characterized by calculating the output.

, T : 측정된 온도, T_ref : 기준온도(=298 K), I_SCO :기준온도에서의 단락전류[A], S : 일사량[W/㎡], J : 단락전류 온도계수 [A/K], n은 다이오드 이상정수, N_S : 모듈의 직렬 연결수, N_P : 모듈의 병렬 연결수, R_SA는 어레이 직렬저항{=(N_S/N_P)R, R:모듈저항}, I_O : 다이오드 포화전류, V_T : 열 전위차[V], I_SCA=N_PI_SC이다.Where I _A is the output current of the solar array, V _A is the output voltage of the solar array, and I _SC is

, T: measured temperature, T _ref : reference temperature (= 298 K), I _SCO : short-circuit current at reference temperature [A], S: insolation amount [W / ㎡], J: short-circuit current temperature coefficient [A / K ], n is diode abnormal constant, N _S : module's series connection, N _P : module's parallel connection, R _SA is array series resistance {= (N _S / N _P ) R, R: module resistance}, I _O : diode saturation current, V _T : thermal potential difference [V], I _SCA = N _P I _SC .

In addition, the performance verification module verifies pass if the actual output value of the solar cell array is equal to or greater than the corrected output value calculated from the corrected output calculation module, and if it is below, verifies that the output of the solar cell is verified.

In addition, the performance verification module calculates the total system loss, and if the system comprehensive output considering the system loss in the correction output calculated from the correction output calculation module is greater than or equal to the reference value of the rated output, it is determined to pass, and if it is less than, it is determined as It is characterized by verifying the performance of the photovoltaic system.

The system loss is calculated by multiplying the efficiency according to the loss generated in the inverter, the water substation facility, and the wiring.

In addition, the memory stores voltage and current characteristic curves according to temperature changes of solar cell modules extracted under standard test conditions during solar cell manufacturing, voltage and current characteristic curves according to changes in insolation, and efficiency information according to system loss. It features.

On the other hand, the output correction and performance verification method of the photovoltaic power generation system according to the present invention includes the step of inputting the measured value from the solar radiation sensor and the temperature sensor to the output verification device, and the voltage and current characteristic curve according to the input measured value and solar radiation change and Computing the corrected output value using the voltage-current characteristic curve according to the temperature change through the correction output calculating module and comparing the corrected output calculated from the correction output calculating module with the actual measured output value to determine whether the standard output is satisfied. Determining and verifying performance.

Here, in the calculating of the corrected output value, the correction output calculation module calculates a voltage current characteristic curve according to the solar radiation value measured by the solar radiation sensor, a temperature value measured by the temperature sensor, and the change of the solar radiation, and a voltage current characteristic curve according to the temperature change. It is characterized by calculating the correction output from the following formula derived.

, T : 측정된 온도, T_ref : 기준온도(=298 K), I_SCO :기준온도에서의 단락전류[A], S : 일사량[W/㎡], J : 단락전류 온도계수 [A/K], n은 다이오드 이상정수, N_S : 모듈의 직렬 연결수, N_P : 모듈의 병렬 연결수, R_SA는 어레이 직렬저항{=(N_S/N_P)R, R:모듈저항}, I_O : 다이오드 포화전류, V_T : 열 전위차[V], I_SCA=N_PI_SC이다.Where I _A is the output current of the solar array, V _A is the output voltage of the solar array, and I _SC is

, T: measured temperature, T _ref : reference temperature (= 298 K), I _SCO : short-circuit current at reference temperature [A], S: insolation amount [W / ㎡], J: short-circuit current temperature coefficient [A / K ], n is diode abnormal constant, N _S : module's series connection, N _P : module's parallel connection, R _SA is array series resistance {= (N _S / N _P ) R, R: module resistance}, I _O : diode saturation current, V _T : thermal potential difference [V], I _SCA = N _P I _SC .

In the verifying of the performance, when the actual output value of the solar cell array is equal to or greater than the corrected output value calculated from the correction output calculation module, it is determined as a pass, and when it is below, it is determined that the output of the solar cell is verified.

In the verifying of the performance, the total system loss is calculated, and if the system comprehensive output considering the system loss is greater than or equal to the reference value of the rated output, the system output is determined to be passed. It is characterized by verifying the performance of the photovoltaic system.

As described above, the apparatus for correcting output and verifying performance of the photovoltaic power generation system according to the present invention and the method thereof are easy and accurate by calculating the corrected output according to the changing solar conditions (insolation amount, temperature) in real time. An excellent effect is possible with performance verification.

Although the detailed description of the present invention described above has been described with reference to the preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above embodiment, and those skilled in the art will appreciate It will be understood that various modifications and changes can be made in the present invention without departing from the spirit and scope of the invention.

Hereinafter, with reference to the drawings and embodiments with respect to the specific configuration and operation of the present invention will be described in detail.

1 is a system configuration diagram of an output verification system of a photovoltaic system according to a preferred embodiment of the present invention. FIG. 2 is a block diagram of the output verifying apparatus of FIG. 1.

1 and 2, the system of the output verification system of the photovoltaic power generation system according to the present invention is a temperature sensor 10 for measuring the temperature of the solar cell module and the solar radiation sensor 20 for measuring the amount of solar radiation and the temperature sensor And an output verification device 30 which verifies the performance of the solar cell by calculating the output value of the photovoltaic power generation corrected according to the temperature and the solar radiation value measured from the solar radiation sensor.

Here, the temperature sensor 10 may be mounted to the rear of the module in order to measure the temperature of the solar cell module, and measure the surface temperature of the solar cell in the field, if the solar cell module is installed as an inclined surface and measures the inclined surface temperature If the plane is installed, measure the plane temperature. In other words, the temperature can be measured on the side where sunlight is most direct in the form of solar cells.

In addition, the solar radiation sensor 20 converts the solar radiation measurement unit for sampling the solar radiation meter every predetermined time and accumulates the solar radiation value and the solar radiation value measured in Joule (J) unit in watt (W) unit. It may be configured to include a part.

More specifically, the solar radiation measuring unit accumulates and accumulates every 10 seconds from the solar radiation meter, regards the cumulative value as the total solar radiation amount every 1 minute, and accumulates the cumulative value for 1 minute for another hour to measure the time solar radiation amount.

The unit converter converts the solar radiation measured in joules [W] into watts [W] because the solar cell standard test condition is expressed in watts [W].

Here, the unit conversion is converted using the relation 1W = 1J / Sec of [J] and [W], and, for example, if the sum of the solar radiation measured for one hour is 3MJ / m 2, the instantaneous power per second (m 2) W / m 2) is 3,000,000 J / 3600 Sec = 833 W / m 2.

Since the solar radiation sensor 20 needs to measure the solar radiation incident on the solar cell module surface perpendicularly, the solar radiation sensor 20 may be installed by attaching the solar radiation sensor at the same angle as the slope of the module.

On the other hand, the output verifying device 30 receives an input of various factors for calculating the corrected output and displays the output verification result and the value input from the solar radiation sensor and the temperature sensor and the voltage according to the change in solar radiation Compensation output calculation module 320 that calculates a corrected output value using the current characteristic curve and the voltage current characteristic curve according to the temperature change, compares the corrected output calculated from the correction output calculation module with the actual measured output value to a standard output. It may include a performance verification module 330 for determining whether or not to satisfy and a memory 340 for storing information necessary for calculating the correction output of the correction output calculation module.

The interface module 310 serves to provide a user interface by inputting various factors necessary for calculating the output corrected according to the solar radiation conditions (temperature, solar radiation amount) installed in the photovoltaic power generation system, and outputting a verification result. In charge. Here, the various factors may be measured values of the temperature sensor and the solar radiation sensor, an output value of the rear end of the inverter of the photovoltaic system, and may include a display device such as an LED and an LCD for displaying the input and output values. .

In addition, the correction output calculation module 320 is derived using the voltage measured by the temperature sensor 10 and the solar radiation sensor 20 and the voltage current characteristic curve according to the temperature change and the voltage current characteristic curve according to the change in the solar radiation amount. The corrected output value is calculated from the equation.

3A is a voltage current characteristic curve according to a change in solar radiation amount of a solar cell according to a preferred embodiment of the present invention, and FIG. 3B is a voltage current characteristic curve according to a temperature change of a solar cell.

Referring to FIGS. 3A and 3B, the short circuit current I _SC of the direct current generating solar cell is a physical quantity proportional to the amount of insolation incident on the module, and the short circuit current increases in proportion to the temperature rise, and the open voltage V _OC. ) Is exponentially proportional to the amount of insolation, whereas it tends to decrease rapidly with respect to the short-circuit current as the temperature rises.

It is possible to estimate the voltage, current, and integer values under constant environmental conditions from the relationship between the temperature and insolation of the short-circuit current and the open-circuit voltage having the above characteristics.

More specifically, look at the correction output calculation method as follows.

In general, a solar cell is classified into a cell, a module, and an array as a source of generating power in a photovoltaic power generation system. Since the cell has a small terminal voltage and output, the cells are connected in series to make a module, and the modules are used in series or parallel connection to form the array based on the system to be designed.

As described above, although the solar cell is a semiconductor device, the characteristics of the solar cell are slightly different in design and fabrication. However, the basic characteristics of the solar cell are increased as the solar cell output current increases when the solar radiation increases according to the solar radiation amount and the surface temperature as shown in FIG. 3. It shows the relationship that the voltage increases when temperature decreases. Accordingly, it can be seen that the characteristics of the output voltage and the current are different according to the change in temperature and the amount of solar radiation, which can be interpreted using an equivalent circuit.

4 is an equivalent circuit diagram of a solar cell according to a preferred embodiment of the present invention.

Referring to FIG. 4, the output current I of the solar cell in the equivalent circuit may be obtained through Equation 1 below.

Where V: solar cell output voltage, I _SC : solar cell short-circuit current [A], I _D : diode current [A], I _SH : parallel resistance current [A], I _O : diode saturation current [A], R _S : Series resistance [Ω], R _SH : Parallel resistance [Ω], n: Diode abnormal constant (1 ~ 2 applied), V _T : Thermal potential difference [V] where V _T = (kT / q) m, k : Boltzmann constant (1.38e ^-23 J / K), T: absolute temperature [K], q: coulomb constant (1.6 x 10 ^-19 C), m: number of cells in the solar cell module.

In addition, it may be expressed by Equation 2 as follows.

Where Iph is the generated photocurrent and I _S is the reverse saturation current of the diode.

However, since the parallel resistance R _SH has a relatively large value of about several hundred ohms (Ω) to several thousand kiloohms (KΩ), the corresponding line can be regarded as an open state as shown in FIG. 5 by ignoring the parallel resistance.

Therefore, when the equation for the parallel resistance in Equation 1 is equalized and obtained again, Equation 3 is obtained.

When Equation 3 is expressed with respect to V, the following Equation 4 is obtained.

In addition, the detailed relational expression for each item of Equation 3 is summarized as in Equation 5, Equation 6, and Equation 7 below.

Where T _ref : reference temperature (= 298 K), I _SCO : short-circuit current [A] at reference temperature, S: insolation amount [W / ㎡], J: short-circuit current temperature coefficient [A / K]

Where V _OC : solar cell open voltage [V], A: saturation current temperature coefficient [A / K], Y: temperature dependence factor (typically 3), Eg: band energy gap [eV], 1eV = 1.6 × 10 ^-19 J

Equation 5 represents a solar cell short-circuit current relation with solar radiation and temperature, Equation 6 is a diode saturation current relation derived from Equation 3, and Equation 7 is a saturation current. It is a relationship to temperature.

In general, the basic data presented by the solar cell module specifications provided by the manufacturer is limited as shown in Table 1 below, where the temperature coefficient is obtained based on FIG. 5 as a design parameter, and the information and basic data in this standard. We can infer the value by using the appropriate relation with.

<Equation 3> to <Equation 5> is a relation of the battery module based on the data of the solar cell module, in order to implement the characteristics in the solar cell array connected in parallel with the number of serial connection (N _S ) of the module Reconstruct including the number N _P.

Therefore, the variables and data of the solar cell array can be obtained by Equation 8 below.

Array output current: I _A = N _P I

Array short circuit current: I _SCA = N _P I _SC

Array terminal voltage: V _A = N _S V

Array Open Voltage: V _OCA = N _S V _OC

Array series resistance: R _SA = (N _S / N _P ) R, where R: module resistance

Substituting Equation (8) into Equation (5) is the same as Equation (9) below. In summary, the equation of the solar cell array as in Equation (10) can be obtained.

Equation 1 through Equation 10, as described above, derives a theoretical equation for obtaining a corrected DC output value for a cell, a module, and an array to be actually applied.

Equation (10) is a formula for calculating the terminal voltage and current using the surface temperature and the solar radiation as variables, and solving the simultaneous equation with two variables of temperature and solar radiation measured in the field, and solving the voltage and current of the solar cell array. Since multiplying this, the DC output of the solar cell array is calculated to obtain the corrected output value according to the change of solar condition (surface temperature and solar radiation).

The corrected output value is a theoretical output value to be obtained at the solar radiation and temperature conditions measured in the field. More specifically, since the calculated value is calculated by correcting the difference between the solar radiation amount and the temperature in the actual field based on the standard test condition of the solar cell (for example, the solar radiation amount of 1000 [W / ㎡], the surface temperature of 25 ℃), the actual measurement If the output value is larger than the corrected output value, the standard output is satisfied.

When the correction output is calculated as described above, the performance verification module verifies the performance of the output of the solar cell by comparing the actual output value (W _M ) of the solar cell with the correction output value (W _A ).

In this case, the performance verification module 330 determines that the solar cell satisfies the standard output when the actual output value W _M is larger than the corrected output value W _A , and thus the pass rate is determined, and the actual output value W _M is the corrected output value. If it is smaller than (W _A ), the solar cell does not meet the standard output, so it is judged as failed and the performance of the solar cell is verified.

For example, suppose the solar cell is 175W (6880 sheets, 16 series, 430 parallel, open voltage 35.7V, short circuit current 4.78A), and the total capacity is 1204kWp (175 × 6880). M 2, temperature 25 ° C.) and the actual output value measured at the site condition different from that of 1185 kWp, and the correction output value calculated by the correction output calculation module is 1180 kWp, the performance verification module 330 passes because the actual output value is higher than the correction output value. Will be judged.

On the other hand, the performance verification module 330 may verify the performance of the overall system efficiency of the photovoltaic system.

6 is a configuration diagram schematically showing a photovoltaic power generation system according to the present invention.

Referring to FIG. 6, it can be seen that the output of the solar cell is lost due to the inverter, the water substation facility, and the wiring.

Table 2 below shows the system performance requirements according to the preferred embodiment of the present invention. Here, the system performance requirements may be provided in various standards according to the capacity and structure of the photovoltaic power generation system.

Warranty items Exam conditions Guarantee Solar Array Maximum Power Warranty Output (100%) 1,200 kWp or more  System efficiency guarantee Power Generation Inverter Efficiency More than 95% Water substation facility efficiency 97% or more Wiring efficiency 92% or more System overall efficiency 84.7% or more

As can be seen from Table 2, it can be seen that a loss occurs due to an inverter, a water substation facility, and a wiring. When the total efficiency is higher than the reference value (84.7%) due to the loss, the performance verification module determines that it is a pass. If it is less than the standard value, it is determined to fail.

Here, the water substation facility is a concept including a peripheral equipment that can cause a loss, such as a boost transformer, a circuit breaker, a switchboard, the wiring is a concept including a direct current AC distribution line that can cause a loss from power generation to the KEPCO distribution line.

Since the calculation of the inverter efficiency, the water substation facility efficiency, and the wiring efficiency are obvious to those skilled in the art, specific calculation methods will be omitted.

The system loss due to the inverter, the water substation facility, and the wiring may be calculated in advance and stored in the memory 340. The performance verification module 330 extracts the system loss stored in the memory to verify the system efficiency of the photovoltaic system. Can be used for

More specifically, the performance verification module 330 guarantees that the value obtained by multiplying the correction output value calculated by the correction output calculation module by the efficiency (inverter efficiency x water substation facility efficiency x wiring efficiency) according to the total system loss as shown in the following determination formula. In the case of more than 84.7% of the rated power of the grid-connected point of the photovoltaic power generation system (1200kWp), the system output is determined to be pass.

Rated output (1200kWp) × (84.7 / 100) ≤ correction output × (inverter efficiency / 100 × water-station equipment efficiency / 100 × wiring efficiency / 100)

1 is a system configuration diagram of an output verification system of a photovoltaic system according to a preferred embodiment of the present invention.

FIG. 2 is a block diagram of the output verifying apparatus of FIG. 1.

3A is a voltage current characteristic curve according to a change in solar radiation amount of a solar cell according to a preferred embodiment of the present invention, and FIG. 3B is a voltage current characteristic curve according to a temperature change of a solar cell.

4 is an equivalent circuit diagram of a solar cell according to a preferred embodiment of the present invention.

FIG. 5 is an equivalent circuit diagram of the simplified solar cell of FIG. 4.

6 is a configuration diagram schematically showing a photovoltaic power generation system according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: temperature sensor 20: solar radiation sensor

30: performance verification device 310: interface module

320: correction output calculation module 330: performance verification module

340: memory

Claims (13)

A temperature sensor formed on the solar cell module and measuring temperature; An solar radiation sensor formed on the solar cell module to measure solar radiation; It includes an output verification device for verifying the performance of the standard output by calculating the output value of the photovoltaic power generation system corrected according to the temperature and the solar radiation value measured from the temperature sensor and the solar radiation sensor, The output verification device An interface module for inputting the measured values of the temperature sensor and the solar radiation sensor for calculating the corrected output and the output values of the rear end of the inverter of the solar power generation system and displaying the output verification result; Corrected output for calculating the output value corrected from the following equation derived from the solar radiation value measured from the solar radiation sensor, the temperature value measured from the temperature sensor, the voltage current characteristic curve according to the change in the solar radiation amount, and the voltage current characteristic curve according to the temperature change. A calculation module; A performance verification module which compares the correction output calculated from the correction output calculating module with the actually measured output value and determines whether the standard output is satisfied; And a memory for storing information necessary for calculating the corrected output of the corrected output calculating module.

Where I _A is the output current of the solar array, V _A is the output voltage of the solar array, and I _SC is

, T: measured temperature, T _ref : reference temperature (= 298 K), I _SCO : short-circuit current at reference temperature [A], S: insolation amount [W / ㎡], J: short-circuit current temperature coefficient [A / K ], n is diode abnormal constant, N _S : module's series connection, N _P : module's parallel connection, R _SA is array series resistance {= (N _S / N _P ) R, R: module resistance}, I _O : diode saturation current, V _T : thermal potential difference [V], I _SCA = N _P I _SC . The method of claim 1, The solar radiation sensor is A solar radiation meter for measuring the solar radiation amount of the solar cell module; An insolation measurement unit configured to sample and accumulate the insolation meter at a predetermined time and measure an amount of time insolation; An apparatus for output correction and performance verification of a photovoltaic power generation system, characterized in that it comprises a unit conversion unit for converting the solar radiation value measured in joules (J) unit in watts (W) unit. The method according to claim 1 or 2, The solar radiation sensor is Output calibration and performance verification device for a photovoltaic power generation system, characterized in that attached to be fixed at the same angle as the solar cell module surface to measure the amount of radiation incident on the solar cell module vertically. delete delete The method of claim 1, The performance verification module When the actual output value of the solar cell array is equal to or greater than the corrected output value calculated from the corrected output calculation module, it is determined as a pass, and when it is below, it is determined as a failure to verify the output of the photovoltaic power generation system. Verification device. The method of claim 1, The performance verification module The total system loss is calculated, and the corrected output calculated from the corrected output calculating module determines that the total system output considering the system loss is equal to or greater than the reference value of the rated output. Output correction and performance verification device for a photovoltaic system, characterized in that. The method of claim 7, wherein The system loss Output calibration and performance verification device of the photovoltaic system, characterized in that it is calculated by multiplying the efficiency according to the losses occurring in the inverter, water substation equipment and wiring. The method of claim 1, The memory is Voltage and current characteristic curves according to temperature changes of solar cell modules extracted under standard test conditions during solar cell manufacturing, voltage and current characteristic curves according to changes in solar radiation, and efficiency information according to system losses Output calibration and performance verification device of power generation system. Inputting the measured values from the solar radiation sensor and the temperature sensor to the output verification device; Calculating a corrected output value using a correction output calculating module by using the inputted measured value and the voltage current characteristic curve according to the change in insolation amount and the voltage current characteristic curve according to the temperature change; Comparing the correction output calculated from the correction output calculating module with an actual measured output value to determine whether the standard output is satisfied, and verifying performance. The calculating of the corrected output value The correction output calculation module calculates the correction output from the following equation derived using the solar radiation value measured from the solar radiation sensor, the temperature value measured from the temperature sensor, the voltage current characteristic curve according to the change in the solar radiation amount, and the voltage current characteristic curve according to the temperature change. Output calibration and performance verification method of a photovoltaic system, characterized in that the calculation.

Where I _A is the output current of the solar array, V _A is the output voltage of the solar array, and I _SC is

, T: measured temperature, T _ref : reference temperature (= 298 K), I _SCO : short-circuit current at reference temperature [A], S: insolation amount [W / ㎡], J: short-circuit current temperature coefficient [A / K ], n is diode abnormal constant, N _S : module's series connection, N _P : module's parallel connection, R _SA is array series resistance {= (N _S / N _P ) R, R: module resistance}, I _O : diode saturation current, V _T : thermal potential difference [V], I _SCA = N _P I _SC . delete The method of claim 10, Verifying the performance When the actual output value of the solar cell array is equal to or greater than the corrected output value calculated from the corrected output calculation module, it is determined to pass and if it is less than, the output of the solar cell system is characterized by verifying the output of the solar power system. Way. The method of claim 10, Verifying the performance The total system loss is calculated, and the corrected output calculated from the corrected output calculating module determines that the total system output considering the system loss is equal to or greater than the reference value of the rated output. Output calibration and performance verification method of a photovoltaic system, characterized in that.

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