KR101647345B1 - Apparatus for generating electricity using sunlight with monitoring function - Google Patents

Abstract

The present invention relates to a photovoltaic apparatus having a monitoring function. The photovoltaic apparatus having a monitoring function includes: a solar battery module generating photovoltaic power; a voltage detection unit detecting a photovoltaic voltage of the solar battery module; an environment information collecting unit collecting environment factor information of a photovoltaic environment; a panel information collecting unit collecting panel factor information of a solar battery panel; and a control unit monitoring an operation state of the photovoltaic apparatus based on the photovoltaic voltage, the environment factor information, and the panel factor information. The photovoltaic apparatus having a monitoring function can improve operation quality of photovoltaic monitoring by reducing an inspection time and a load.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a solar-

What is disclosed herein relates to an apparatus for monitoring solar power generation.

Generally, the photovoltaic power generation equipment converts sunlight directly into electric energy. It is used for power supply of unmanned lighthouses or light buoys located on the island where commercial power can not be used by connecting in series or parallel according to the necessary unit capacity. This is a device that can extend the use time of the battery by supplying new energy in parallel with the battery in case the light can not be used. (Solar power generation device (e-museum, National Museum of Korea))

The structure of such a photovoltaic power generation device is described in the prior art document "10-2009-0020164, title of invention, solar photovoltaic module equipped with monitoring function"

The conventional photovoltaic power generation system includes a solar cell array in which solar cell modules for supplying predetermined DC power corresponding to received solar beams are connected in series, a storage battery in which electric power supplied from a solar cell array is charged or discharged A single inverter for converting DC power generated in the solar cell array into AC power, a charge controller for charging the power supplied from the solar cell array to the battery or supplying the power to the inverter, and a load for consuming power generated in the photovoltaic power generation system (Not shown)

On the other hand, another prior art document is a technology for calculating the daily power amount of a solar power generation system and checking the operation state of the solar light illumination based on this technology (domestic application no. 10-2010-0033637, entitled: Power generation modules and solar lights, etc.).

This technology provides a method for checking the normal operation of the solar power generation module and the solar lighting lamp when supplying the power generated through the solar power generation module to the solar lighting lamp, It not only visually confirms the changes easily but also provides the convenience to the user because it notifies the user in real time about the failure. "

In consideration of the environment of the photovoltaic power generation system, it is necessary to monitor the abnormal condition of the photovoltaic power generation due to the weather environment or the mechanical failure, Monitoring may be possible.

The disclosed contents are to improve the operation quality of PV monitoring by sequentially inspecting the abnormal power generation elements in the order of abnormal power generation in monitoring the PV power generation and reducing inspection time and load The present invention has been made in view of the above problems.

In the photovoltaic device according to the embodiment,

A solar panel, and a solar cell module element in accordance with a sequence of abnormal power generation during monitoring of solar photovoltaic power generation, and performs the sequential estimation inspection operation based on a predetermined factor And estimates the abnormal growth factor by estimating the factor that occurs until the reference value is over and the reference value is equal to or more than the reference value and the estimated value of the specific factor is an improved estimation of the autoregressive moving average model Is calculated based on [Expression 1].

[Formula 1]

Y _t = α ₁ Y _{t -1} + α ₂ Y _{t -2} + ... + α _p Y _{t -p} + ε _t - β ₁ ε _t-1 - ... - β _q ε _tq

(Where Y _t is the estimated value of the generated power of the current element, Y _{t -p} is the element factor of the current element (for example, the element factor is solar radiation, temperature, humidity, Ε is the power generation influence influence factor factor by element factor, and the difference between Y _{t -p} and δ is the solar power of ε, Power generation effect)

According to the embodiments, in monitoring the photovoltaic power generation, the abnormal power generation elements are sequentially inspected in the order of higher power generation efficiency, and the inspection time and load are reduced to improve the operation quality of the photovoltaic power monitoring.

In addition, by decreasing the sequential estimation operation time and performing an effective sequential estimation operation or the like, it is possible to increase the accuracy of the photovoltaic generation environment estimation value when the photovoltaic generation environment is a candidate element, or to increase the reliability of the estimated value of the solar panel candidate element, It further improves the operation quality of PV monitoring.

It is also possible to clarify whether the abnormality of the photovoltaic power value is due to what kind of cause, that is, due to a weather environment or a mechanical failure, and if it is caused by mechanical failure, , Thereby helping the manager to facilitate the action.

That is, it is possible to precisely monitor the failure of the photovoltaic power generation value, and to easily and efficiently cope with the failure.

1 is a view showing a configuration of a photovoltaic device according to an embodiment;
2 is a view showing the configuration of a voltage detecting unit according to an embodiment;
3 is a view showing a configuration of another photovoltaic device according to one embodiment

1 is a view showing a configuration of a photovoltaic generator according to an embodiment.

As shown in FIG. 1, the solar photovoltaic device according to one embodiment inputs solar photovoltaic power into an inverter that converts AC power into AC that can be used in real life, (100) for generating the solar photovoltaic power, a photovoltaic module (100) installed in an input line between the photovoltaic module (100) and the inverter, for generating photovoltaic power generation voltage of the photovoltaic module An environmental information collecting unit 400 for collecting environmental factor information of the solar power generation environment, a panel information collecting unit 500 for collecting panel factor information of the solar panel, Based on the photovoltaic power generation voltage detected by the photovoltaic power generation unit 500 and the environmental factor information and the panel factor information collected by the environment information collection unit and the panel information collection unit 500, (Not shown) for detecting the current degree of abrasion of the solar cell panel, and the control unit 300 controls the voltage detecting unit 200 to detect If the current photovoltaic power value based on the photovoltaic generation voltage detected by the voltage detection unit 200 is less than the set value, If the current solar power generation environment corresponds to the set normal environment as a result of the check, information indicating that there is an abnormality in the solar cell module 100 area is transmitted to the administrator terminal, When the photovoltaic environment corresponds to the set abnormal environment, the degree of the influence of the photovoltaic power generation environment, which is the present abnormal environment, on the generated power is calculated, Wu and sunlight to transmit information indicating that there is abnormality in the development environment to the administrator terminal, to send to the information indicating the set value is less than that over the solar cell module 100 to the administrator terminal region.

The solar cell module 100 produces photovoltaic power generation. The plurality of photovoltaic module groups are connected in parallel, and the direct current input from each group of the photovoltaic modules connected in parallel is output in a serial connection manner. The solar cell module group means that a plurality of solar cell modules converting solar energy into electric energy and outputting them are connected in series to form one group. A plurality of solar cell module groups are connected in parallel to supply power, thereby supplying DC power to the inverter more stably. The solar cell module 100 is composed of a solar cell module group, the solar cell module group is composed of a plurality of groups, the voltage detecting unit 200 is installed for each of the plurality of solar cell module groups, 300 monitors the operation state of each of the plurality of solar cell modules.

The voltage detector 200 is connected to the input line between the solar cell module 100 and the inverter and detects the solar power generation voltage of the solar cell module 100. This photovoltaic generation voltage is transmitted to the control unit 300, and this information is used in the case of calculating the photovoltaic power value required to determine the operating state of the photovoltaic device.

The environment information collecting unit 400 includes a temperature sensor (not shown) that senses the temperature of the solar ambient environment, a humidity sensor (not shown) that senses the humidity of the solar ambient environment, (Weather information such as season, weather, temperature, and the like) from a networked weather information providing information processing device (e.g., a weather server), and an illumination sensor (not shown) Humidity, and illuminance information corresponding to the current weather environment (in this case, the standard temperature, humidity, and illuminance information are registered for each weather environment) corresponding to the current weather environment, And determines whether the current solar power generation environment is a set normal environment or a set abnormal environment according to the comparison result.

The sensor detects the degree of dust or foreign matter adhering to the surface of the solar cell module 100. That is, it is a sensor that detects the degree of dust or foreign matter adhering to the solar cell panel. The controller 300 checks the cleanliness of the solar panel based on information sensed by the sensor.

Based on the solar power generation voltage detected by the voltage detection unit and the environmental factor information and the panel factor information collected by the environment information collection unit 400 and the panel information collection unit 500, To monitor the operating state of the battery. At this time, the controller 300 performs a normal process when the current photovoltaic power generation value based on the photovoltaic generation voltage detected by the voltage detection unit exceeds the set value, When the photovoltaic power value is less than the set value, an abnormal power generation element is estimated. For example, the abnormal power generation element may be a solar power generation environment, a solar cell panel, and a solar cell module, and may be a PV power generation environment preset based on the degree of abnormal power generation, Solar cell module, solar cell module, and solar cell module in order. For example, the sequential estimation operation first estimates whether the photovoltaic generation environment is an abnormal power generation element based on the following expression (2), and outputs the estimated value of the expression (2) X _t ) is equal to or larger than the set value, the solar power generation environment is determined to be an abnormal power generation causing element, and when the estimated value X _t of the first estimation result [Formula 2] (3), and if the estimated value (Z _t ) in the second estimation result (Equation 3) is equal to or larger than the set value, the solar cell panel is determined as an abnormal power generation causing element, If the estimated value Z _t of the second estimation result (Equation 3) is less than the set value, the solar cell itself is determined to be an abnormal power generation causing element and is estimated successively. [Expression _{2] X t = γ 1 X} t -1 + γ 2 X t -2 + ... + γ p X t -p + ζ t - δ t-1 ζ t-1 - ... - δ q ζ _tq where X _t is the estimated value of the generation power influence of the present solar power generation environment and X _{t -p} is the power generation power of the present solar power generation environment environmental factor (including the irradiation amount, temperature, humidity, wind speed, Ζ is the difference between the moving average value of the power generation influences by the environmental factors and the X _{t -p} , and δ is the solar power generation influence of the ζ described above. [Formula 3] Z _t -2 = η ₁ Z _{t -1} + η ₂ Z _{t -2} + ... + η _p Z _tp + ι _t - ι ₁ κ _{t -1} - ... - ι _q κ _tq , Z _t is an estimated value of the generated power of the solar cell panel at present, Z _{t -p} is a panel parameter of the solar cell panel (surface cleanliness (for example, the cleanliness of the panel surface including the degree of dust or foreign matter, And the surface condition of the panel itself including cracks), surface temperature, array Value included (including connection parts between the panel) conditions), the generated power is also affected by, η is a correlation between the generated power per panel factor, κ is a panel generated power is also affected by the moving average value and the factor Z _t between _-p error, ι Is the influence of the photovoltaic power of the above κ). Meanwhile, the moving average section according to an exemplary embodiment may be different for each part, that is, for each solar cell panel. For example, in case of a solar cell panel worn out quickly, the moving average section is set short, The moving average section is set to be long. For this, the controller 300 calculates the moving average of the solar cell panel in use based on the current wear rate of the solar panel provided from the sensor for detecting the current wear rate of the solar panel, If the wear rate is smaller than the set value, the moving average section value is subtracted from the setting moving average section value by the moving average section value calculated in accordance with the following formula 4, and if the current wear degree of the solar panel in use is larger than the set value, The reference moving average section value is added by the moving average section value calculated in accordance with the following [Equation 4], and the extension is set. (For example, setting the moving average section of the above-mentioned [Equation 3]), the moving average section = [{(current wear-setting wear amount) / setting unit wear amount difference value} If the current wear rate of the solar cell panel is less than the set value, if the wear level difference between the current wear level and the set value is '+1000', the wear level difference value divided by the set unit wear level difference value '100' A moving average section value obtained by multiplying the unit moving average section '1 day' by a moving average section value of 10 days is subtracted from a setting reference moving average section value of 21 days, a moving average section is shortened to 11 days which is a subtracted moving average section value, When the current wear rate of the solar panel is larger than the set value, when the wear level difference between the current wear level and the set value is '-300', the wear level difference value divided by the set level wear level value '100' unit The moving average section value is added to the set reference moving average section value 21 by the moving average section value obtained by multiplying the moving average section value " 1 day ", which is the average section, and the moving average section is set to be the added moving average section value. For example, if there is raw data for one month and the period is 7 days, the moving average value of the power generation influence of the 1st day solar cell panel of 1 day to 7 days is obtained, The moving average value of the generated power influence degree of the battery panel is obtained and the moving average value of the generated power influence degree of the third day solar panel of 3 to 9 days is obtained by the date or time zone. In order to reduce the sequential estimation operation time and to improve the operation quality of the photovoltaic power generation monitoring by, for example, an effective sequential estimation operation, the controller 300 according to an exemplary embodiment may perform the abnormal- The weather information providing apparatus 400 receives the current weather environment from the networked weather information providing information processing apparatus as follows and compares the surrounding environment information of the corresponding solar module collected by the environment information collecting unit 400 with the current weather environment If the environment information of the corresponding solar cell module collected by the environment information collecting unit 400 is the same as the predetermined reference environmental information corresponding to the provided current weather environment, If it is determined that the photovoltaic power generation environment is in a normal environment and the environment information of the corresponding solar cell module collected by the environment information collection unit 400 differs from the predetermined reference environment information in accordance with the provided current weather environment It is determined that the present solar power generation environment is an abnormal environment, and in accordance with the determination result, Wherein the abnormality generating element is composed of a solar panel and a solar cell module, and sequentially estimates the abnormality in the order of the solar cell panel and the solar cell module based on the degree of abnormal power generation, And when the present solar power generation environment is unstable, the abnormal power generation factor is constituted by a solar power generation environment, a solar cell panel, and a solar cell module, and a predetermined solar power generation environment , The solar cell panel, and the solar cell module in this order, and estimates the second generation cause element as the second estimation. The first autocorrelation coefficient according to an embodiment is set to have a higher value as the autocorrelation coefficient of the photovoltaic power generation factor having a high degree of influence on generation power. Specific settings are obtained through experiments (eg, autoregressive moving average model verification) or experience. Specifically, the first autocorrelation coefficient for each of the photovoltaic power generation environmental factors is set to be higher in order of solar radiation amount, temperature, humidity, wind speed, The first and second autocorrelation coefficients of the solar photovoltaic power generation factors are different from season to season, and the seasonality is set to be different for each solar power generation environmental factor in proportion to the degree of correlation between factors and seasons (specifically, For example, when the first autocorrelation factor having a high correlation with the summer season is high in the summer season, the first autocorrelation coefficient is a first autocorrelation coefficient higher than the reference autocorrelation coefficient of the insolation factor, The first autocorrelation coefficient corresponding to the current season is different for each of the photovoltaic power generation environmental factors Set beforehand. In addition, when the controller 300 estimates the abnormal generator element, the controller 300 transmits the estimated abnormal generator element information to the previously registered administrator terminal. That is, in the case where the estimated abnormal generator element information is a photovoltaic power generation environment, the information that the present photovoltaic power generation environment is an abnormal photovoltaic power generation environment is notified to the registered administrator terminal, In the case of a battery panel, the current solar panel notifies the information of the abnormal solar panel to the previously registered administrator terminal and transmits the information.

The operation of the photovoltaic apparatus having the monitoring according to the embodiment of FIG. 1 will be described.

First, the solar power generation apparatus having the monitoring according to an embodiment of the present invention first compares the current solar power generation value based on the solar power generation voltage detected by the voltage detection unit with a preset value.

Wherein when the current photovoltaic power generation value based on the photovoltaic generation voltage detected by the voltage detection unit exceeds a set value as a result of the comparison, If the power value is less than the set value, an abnormal power generation element is estimated.

That is, the abnormal power generation factor is composed of a solar power generation environment, a solar cell panel, and a solar cell module, and is sequentially estimated based on the solar power generation environment, the solar cell panel, , And estimates an abnormal power generation factor.

A specific operation will be described.

First, it is firstly estimated whether the photovoltaic generation environment is an abnormal power generation factor in the following expression (2), and when the estimated value (X _t ) in the first estimation result (Formula 2) The environment is identified as an abnormal development factor.

[Formula 2]

X _t = γ ₁ X _{t -1} + γ ₂ X _{t -2} + ... + γ _p X _{t -p} + ζ _t - δ _t-1 ζ _t-1 - ... - δ _q ζ _tq

(Where X _t is the estimated value of the generated power influence of the present solar power generation environment and X _{t -p} is the influence of the generated power according to the environmental factor (including the solar radiation amount, temperature, humidity, wind speed, and wind direction) , γ is the correlation between the generated power of each environmental factor, ζ is the difference between the moving average value of the generated power influences by the environmental factor and the X _{t -p} , and δ is the solar power generation influence of the ζ,

On the other hand, if the estimated value X _t of the formula (2) is less than the set value, the second estimation is performed using the following formula (3) to determine whether the solar cell panel is an abnormal power generation factor.

[Formula 3]

Z _t -2 = η ₁ Z _{t -1} + η ₂ Z _{t -2} + ... + η _p Z _tp + ι _t - ι ₁ κ _t-1 - ... - ι _q κ _tq

(Where Z _t is an estimated value of the generated power influence of the current solar cell panel, Z _{t -p} is the influence of generated power by the panel factor (including surface cleanliness, surface temperature, and array device status) of the present solar cell panel, Κ is an error between the moving average value and the Z _{t -p} , and ι is the solar power generation influence of the κ,

If the estimated value Z _t of the second estimation result in Equation 3 is equal to or larger than the set value, the solar cell panel is determined as an abnormal power generation causing element, and the estimated value Z _t ) is less than the set value, the solar cell itself is determined to be an abnormal power generation generating element and is estimated in sequence.

As a result, inspection time and load are reduced to improve the operation quality of PV monitoring.

As described above, according to the embodiment, in the monitoring of the photovoltaic power generation, the abnormal power generation elements are sequentially inspected in the order of higher power generation efficiency, and the inspection time and load are reduced, .

Meanwhile, in one embodiment, the moving average section of the solar panel candidate elements is set differently so as to improve the reliability of the estimated value of the solar panel candidate elements.

For example, in the case of a solar cell panel that is worn out quickly, the moving average section may be set to be short, and in the case of a solar cell panel that is worn out late, the moving average section may be moved Set the average section to be long.

To this end, in one embodiment, the moving average section of Equation (3) is a moving average calculated according to the following Equation 4 in the set reference moving average section value when the current wear rate of the solar cell panel in use is less than the set value The value is subtracted by the interval value and set to shorten.

[Formula 4]

Moving average section = [{(current wear-setting wear) / set wear difference value} × setting unit moving average section]

On the other hand, when the current wear rate of the solar panel in use is larger than the set value, the set reference moving average section value is added by the moving average section value calculated in accordance with the above-mentioned [Expression 4]

For example, when the current wear rate of the solar cell panel in use is less than the set value and the difference between the current wear rate and the set value is '+1000', the setting unit Is subtracted from the set reference moving average section value 21 days by the moving average section value obtained by multiplying '10' by '1 day', which is the set unit moving average section, by the wear difference value '100' The moving average section is shortened to 11 days which is the subtracted moving average section value.

When the current wear rate of the solar panel in use is larger than the set value, when the wear level difference between the current wear level and the set value is '-300', the wear level difference value divided by the set unit wear level difference value '100' 3 'to the set reference moving average section value 21 by the moving average section value 3, which is obtained by multiplying the set unit moving average section " 1 day ", and the moving average section is set to be the added moving average section value 24 days .

The moving average value is obtained by, for example, a moving average value of the power generation influence of the first day solar cell panel of one day to seven days when there is original data for one month and the period is seven days, And the moving average value of the influence of the generated power of the third day solar cell panel of 3 days to 9 days is obtained by the date or time zone.

As a result, the reliability of the estimated value of the solar panel candidate element is improved, thereby further improving the operation quality of the solar power generation monitoring.

One embodiment of the present invention can improve the operation quality of the photovoltaic power generation monitoring by reducing the sequential estimation operation time and performing an effective sequential estimation operation, and the specific operation will be described.

That is, the present weather environment is provided from the base networked weather information providing information processing apparatus (for example, a meteorological information processing apparatus (negotiation, "server")) And compares the environment information with predetermined reference environmental information corresponding to the provided current weather environment.

When the comparison result indicates that the environment information of the corresponding solar cell module collected by the environment information collecting unit is the same as the preset reference environment information corresponding to the provided current weather environment, it is determined that the present solar environment is a normal environment.

On the other hand, when the comparison result indicates that the environment information of the corresponding solar cell module collected by the environment information collecting unit is different from the predetermined reference environment information corresponding to the provided current weather environment, it is determined that the present solar environment is an abnormal environment.

If the present solar power generation environment is normal according to the result of the determination, the abnormal power generation element is composed of a solar panel and a solar cell module, and the predetermined solar cell panel, solar cell module And when the present solar power generation environment is unstable, the abnormality generation element is composed of a solar power generation environment, a solar cell panel, and a solar cell module, Estimates the solar power generation environment, the solar cell panel, and the solar cell module in sequence in order, and estimates the abnormal power generation factor by the second estimation.

As a result, the operation quality of the photovoltaic power generation monitoring is further improved by reducing the sequential estimation operation time and performing an effective sequential estimation operation or the like.

Alternatively, according to one embodiment, the accuracy of the photovoltaic environment estimation value can be improved, and a specific operation will be described.

The first autocorrelation coefficient according to one embodiment is set to have a higher value as the autocorrelation coefficient of the photovoltaic power generation factor having a high degree of influence on the generated power. Specific settings are obtained through experiments (eg, autoregressive moving average model verification) or experience.

Specifically, the first autocorrelation coefficient for each of the photovoltaic power generation environmental factors is set to be higher in order of solar radiation amount, temperature, humidity, wind speed, The first and second autocorrelation coefficients of the respective factors are different for each season, and the first autocorrelation coefficients corresponding to the current season are set for each of the photovoltaic power generation environmental factors.

For example, when the first autocorrelation coefficient of the insolation factor is summer season, the first autocorrelation coefficient is a first autocorrelation coefficient higher than the reference autocorrelation coefficient of the insolation factor, and the reference autocorrelation coefficient of the insolation factor And the first autocorrelation coefficient corresponding to the current season is set to the first autocorrelation coefficient of the irradiation dose factor.

Meanwhile, another configuration of the solar photovoltaic device according to one embodiment is another example as follows.

Another solar photovoltaic device according to an embodiment of the present invention is a solar photovoltaic power generating device for inputting solar photovoltaic power into an inverter for converting AC power into AC that can be used in real life, A voltage detection unit installed in an input line between the battery module and the inverter for detecting a solar photovoltaic voltage of the solar cell module, an environmental information collection unit for collecting environmental information of the solar cell module, And a control unit for monitoring an operation state of the solar power generation device based on a photovoltaic power generation voltage and surrounding environment information of the solar cell module collected by the environment information collecting unit, Standard power value corresponding to the current environment of the photovoltaic environment calculated based on the photovoltaic environment information An abnormality signal indicating that the operation state of the solar cell power generation apparatus is in an abnormal state when the difference value between the PV power generation value based on the solar power generation voltage detected by the voltage detection section is equal to or greater than the set value is transmitted to the display device or the administrator terminal If the difference between the standard power value corresponding to the current solar ambient environment and the PV power generation value based on the PV generation voltage detected by the voltage detection unit is less than the set value, To the display device or the administrator terminal.

In particular, the control unit may calculate the solar power generation environment based on the information collected from the environment information collection unit, calculate a standard power value corresponding to the calculated solar power generation environment, and a photovoltaic generation voltage based on the photovoltaic generation voltage An abnormality signal indicating that the present operating state of the solar power generation apparatus is in an abnormal state is transmitted to the display device or the administrator terminal when the difference from the present solar power generation value is equal to or greater than the set value, If the difference between the power value and the current solar power generation value is less than the set value, a normal signal indicating that the current operation state of the solar power generation apparatus is in a normal state is transmitted to the display device or the administrator terminal. Based on the ambient temperature, humidity, and illuminance information of the photovoltaic power generation collected from the environment information collecting department, the photovoltaic power generation environment calculates whether the present solar power generation environment is season, weather, daytime / nighttime, . For example, if the season is the first season, the weather is in the first weather condition, and in the daytime, the first solar power generation environment is obtained. If the season is the second season, the weather is in the second weather condition, and the night is in the second solar power generation environment. The standard power value has a value suitable for each PV environment. For example, a first standard power value is set in the first solar power generation environment, and a second standard power value is set in the second solar power generation environment. The photovoltaic power value is obtained based on the photovoltaic current generated by converting the current photovoltaic voltage generated by the photovoltaic module and the generated voltage (the photovoltaic power calculator is responsible for this). For example, the control unit may include a voltage-current conversion module for converting the solar power generation voltage into a solar power generation current, a solar power generation power calculation unit for calculating solar power generation power, a standard power value corresponding to the solar power generation environment An abnormal signal indicating that the operating state of the solar cell generator is in an abnormal state is outputted when the difference value of the current solar cell power value is equal to or greater than the set value, and the standard power value corresponding to the solar cell generation environment and the current solar cell power generation power And a communication interface for communicating with the display device or the administrator terminal when the difference value of the value is less than the set value, .

2 is a diagram illustrating a configuration of a voltage detector 200 according to an embodiment.

As shown in FIG. 2, the voltage detector 200 according to an exemplary embodiment may include a fuse, a Hall sensor, and a diode.

The fuse prevents the input of the overcurrent input from the solar cell module group. That is, when the overcurrent (overvoltage) is drawn, the fuse and the holder turn off the power of the input unit. Here, it is preferable that the holder is a structure that can be simply switched, and it is preferable that the holder is provided so as to be easy to check and replace the fuse. A fuse according to an embodiment may adopt a fuse having a DC 1000V, 20A standard, and a holder having a DC 690V standard may be adopted.

The Hall sensor detects the input current value input from the solar cell module group flowing through the input line and outputs the detected input current value to the detection unit. Hall sensor is a sensor that detects magnetic field and is a sensor device that detects magnetic field strength according to input current value using a Hall effect. The detector calculates the input current value using the intensity of the magnetic field according to the input current value input from the hall sensor.

The diode prevents the reverse current of the direct current inputted from the solar cell module group. In other words, it functions to prevent the inversion phenomenon of the input current. Preferably, the diode according to an exemplary embodiment employs a diode having a 1000V, 50A standard.

FIG. 3 is a view showing a configuration of another photovoltaic device according to one embodiment.

As shown in FIG. 3, another photovoltaic device according to one embodiment includes a plurality of solar cell modules connected in parallel, and a direct current input from each group of solar cell modules connected in parallel is connected in series . The solar cell module group means that a plurality of solar cell modules converting solar energy into electric energy and outputting them are connected in series to form one group. Since the solar cell module itself employs a known technique, a detailed description thereof will be omitted.

In this manner, a plurality of groups of solar cell modules are connected in parallel to supply power, so that the DC power can be supplied to the inverter more stably.

In the solar cell module group, the voltage detection units 201 to 204 of FIG. 2 are installed, respectively, and the hall sensor of the voltage detection unit applies the photovoltaic generation voltage to the control unit 300.

Description of the Related Art [0002]
100: solar cell module 200: voltage detector
300: control unit 400: environment information collecting unit
500: Panel information collecting unit

Claims (4)

A photovoltaic power generation apparatus for inputting photovoltaic power into an inverter that converts the photovoltaic power into an alternating current usable in real life,
A solar cell module including a solar cell panel and a solar cell, the solar cell module generating the solar photovoltaic power;
A voltage detecting unit installed on an input line between the solar cell module and the inverter and detecting a solar power generation voltage of the solar cell module;
An environmental information collecting unit for collecting environmental factor information of a photovoltaic power generation environment;
A panel information collecting unit for collecting panel factor information of the solar panel; And
A control unit for monitoring an operation state of the solar power generation device based on the solar power generation voltage detected by the voltage detection unit, the environmental factor information collected by the environment information collecting unit, and the panel factor information collected by the panel information collecting unit;
Lt; / RTI >

Wherein,
Wherein when the current photovoltaic power generation value based on the photovoltaic generation voltage detected by the voltage detection unit exceeds a set value, The abnormal power generation factor which substantially affects the abnormality of the present solar power generation value is detected by estimating the abnormality generation element,

Wherein the abnormal power generation factor is a solar power generation environment, a solar cell panel, and a solar cell module, and the abnormal power generation factor estimation is sequentially performed in the order of solar power generation environment, solar cell panel, ≪ / RTI &

The sequential estimation of the anomalous generator elements may include:
(1) is a first estimation of whether or not the photovoltaic generation environment is an abnormal power generation element in the following [Formula 2], and when the estimated value (X _t ) of the first estimation result [Formula 2] Is determined as an abnormal power generation generating element, and whether the solar cell panel is an abnormal power generation generating element when the estimated value (X _t ) in the first estimation result [Formula 2] is less than the set value is determined by the following [Formula 3] 2), and when the estimated value (Z _t ) in the second estimation result (Equation 3) is equal to or greater than the set value, the solar cell panel is determined as an abnormal power generation causing element, and the estimated value (Z _t ) is less than a set value, the solar cell itself is determined as an abnormal power generation element, and is estimated successively,
[Formula 2]
_{X t = γ 1 X t-} 1 + γ 2 X t-2 + ... + γ p X tp + ζ t - δ t-1 ζ t-1 - ... - δ q ζ tq
(Where X _t is the estimated value of the generated power influence of the present solar power generation environment, X _tp is the influence of the generated power by the environmental factor (including the solar radiation amount, temperature, humidity, wind speed, and wind direction) Is the correlation between generated power of each environmental factor, ζ is the difference between the moving average value and the X _tp , and δ is the influence of solar power generation power of the above ζ,
[Formula 3]
Z _t -2 = η ₁ Z _{t -1} + η ₂ Z _t-2 + ... + η _p Z _tp + ι _t - ι ₁ κ _t-1 - ... - ι _q κ _tq
(Where Z _t is an estimated value of current generation power influence of the solar cell panel, Z _tp is a power generation influence influence of the current solar panel panel factor (including surface cleanliness, surface temperature, and inter-panel array device status) Κ is the difference between the moving average value and the Z _tp , and ι is the solar power generation influence factor of κ,

The moving average section of Equation (3)
If the current wear rate of the solar panel in use is smaller than the set value, the moving average section value is subtracted from the setting moving average section value by the moving average section value calculated according to the following formula 4 and shortened, and the current abrasion degree Is larger than the set value, the moving average section value is added to the set reference moving average section value by the moving average section value calculated according to the following [Equation 4] to set the extension;
[Formula 4]
Moving average section = [{(current wear-setting wear) / set wear difference value} × setting unit moving average section]

The first autocorrelation coefficient for each of the photovoltaic power generation environmental factors is,
The temperature of the solar battery is set to be higher in the order of the solar radiation amount, the temperature, the humidity, the wind speed, and the wind direction in accordance with the solar power generation environmental factors, And a first autocorrelation coefficient corresponding to the current season is set for each of the photovoltaic power generation environmental factors,

The first autocorrelation coefficient of each solar photovoltaic power generation factor is set to be different for each solar photovoltaic power generation factor for each season in proportion to the degree of correlation between the solar photovoltaic power generation factor and the season,
The first and second correlation coefficients of the first correlation coefficient with the summer season are higher than those of the second correlation coefficient when the first correlation coefficient is higher than the reference correlation coefficient of the insolation factor in the summer season. To a first autocorrelation coefficient that is lower than the reference autocorrelation coefficient of the first set of autocorrelation coefficients;
Wherein the monitoring device is provided with a monitoring function. delete The method according to claim 1,
The control unit
And transmits the estimated abnormal power generation factor information to the previously registered administrator terminal when the abnormal power generation factor is estimated. The method according to claim 1,
In the solar cell module,
A solar cell module group, and a plurality of solar cell module groups,

The voltage detector may include:
A plurality of solar cell modules,

Wherein,
Monitoring an operation state of each of the plurality of solar cell module groups;
Wherein the monitoring device is provided with a monitoring function.

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