KR20080011979A - On-line monitoring system and method for solar cell module - Google Patents

Abstract

A system and a method for monitoring/diagnosing solar cell modules of a large scale solar power facility in the network are provided to facilitate maintenance of a solar power generation system by monitoring/diagnosing electricity generated from a plurality of solar cell modules at a remote place and storing monitoring details to a database. A plurality of solar cell modules(10) converts light energy into electric energy and outputs the electric energy. A DAQ(Data Acquisition) module(30) collects digital signals by including a sensor(20) measuring the electric energy and an ADC(Analog/Digital Converter)(30a) converting a measured analog data into a digital data wherein the sensor is connected to an output terminal of the solar cell modules. A wireless transmitting module(41) transmits the digital signal of the DAQ module to a wireless receiving module(42). A CPU(70a) compares the digital signal with optimal data optimized by a weather condition, a solar cell module replacement condition, and a solar cell module abnormality determination condition. A computer(70) stores the data to the database when the compared data satisfies the conditions and informs a manager of a diagnosis result by displaying the digital signal when the conditions are not satisfied.

Description

On-line Monitoring System and method for Solar Cell Module}

1 is a schematic configuration diagram of a solar cell module online monitoring diagnostic system of a large-scale photovoltaic power generation facility according to an embodiment of the present invention;

2 is a view showing the flow of a solar cell module online monitoring diagnostic method of a large-scale photovoltaic power generation facility according to another embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: storage battery,

200: power controller,

300: inverter,

10: solar cell module,

20: sensing means,

30: DAQ module,

30a: A / D converter,

41: wireless transmission module,

42: wireless receiving module,

70: computer,

70a: central processing unit.

The present invention relates to a method and system for monitoring and monitoring a solar cell module online in a large-scale photovoltaic power generation facility. It is easy to maintain and repair the photovoltaic power generation system by monitoring and diagnosing on-line, and it is a database of the solar cell module of a large-scale photovoltaic facility designed to contribute to the development of technology in related fields The present invention relates to a monitoring diagnostic method and a system thereof.

Recently, in accordance with the Climate Change Convention (Kyoto Protocol), it is urgent to secure eco-friendly alternative energy due to the burden of GHG reduction, and the government has provided 3% of alternative energy supply in 2006 and 5 in 2010. By setting the target at%, we are promoting various technology development and distribution projects.

Among such alternative energy is the photovoltaic power generation system, which is an infinitely clean and clean energy that converts into electrical energy by using the photoelectric effect of solar energy. Photovoltaic power generation system is a distributed power system that has a variety of arrays, which makes it easy to select the size of power generation, has less space for installation, and can be installed in a dense load area. .

In addition, solar power generation systems are being actively researched by leading universities and research institutes in Korea, and as a result, key element technologies such as solar cell modules, capacitors, and power converters have been secured.

However, despite the mass production of solar power system technology, the technology of using such a system is very insufficient. In particular, it is very urgent to secure maintenance and repair technologies in accordance with the expansion of solar power generation systems.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to provide the amount of electrical energy produced by a plurality of solar cell modules used in the field where a large-scale photovoltaic power generation system is built, even at a distance online. Online monitoring of solar cell modules in large-scale photovoltaic power generation facilities designed to contribute to the development of technology in related fields by facilitating the maintenance and maintenance of the photovoltaic power generation system by monitoring and diagnosing them. The present invention provides a diagnostic method and system.

An object of the present invention as described above in the conventional photovoltaic power generation system configured to convert light energy incident from the sun into electrical energy to supply to each load,

A plurality of solar cell modules for converting and outputting light energy into electrical energy;

DAQ module connected to the output side of the plurality of solar cell module having a sensing means for precisely measuring electrical energy and an A / D converter for converting the analog signal measured by the sensing means into a digital signal to collect the digital signal ;

A wireless transmission module converting the digital signal of the DAQ module into a wireless signal and wirelessly transmitting the wireless signal to a wireless reception module described later;

A wireless receiving module for receiving the wireless signal and converting the digital signal into a digital signal; And

The optimized data is stored in advance in climatic conditions, reasonable replacement timing conditions of the solar cell module, and diagnostic conditions of the solar cell module. Thus, the central processing unit performing comparative operation with the digital signal and the comparison calculated data value This is achieved by a solar cell module on-line monitoring diagnostic system of a large-scale photovoltaic power generation facility, comprising: a computer that informs the diagnosis result by storing and storing a database if the content is satisfied and displaying the result if the condition is not satisfied.

An object of the present invention as described above is another category, a solar cell module energy conversion step of converting the light energy into electrical energy and outputting;

A signal collection step of precisely measuring the converted electrical energy as the energy conversion step and converting and measuring the measured analog signal into a digital signal;

A radio transmission step of converting the collected digital signal into a radio signal and transmitting the radio signal to the outside;

A radio signal reception step and a signal conversion step of receiving the radio signal transmitted as the radio transmission step and converting the radio signal into a digital signal;

Comparing with the digital signal based on the data optimized by climatic conditions, rational replacement timing conditions of the solar cell module, diagnostic conditions of the solar cell module, and if the comparison operation data value satisfies the conditions to make a database It can also be achieved by a solar cell module online monitoring diagnostic method of a large-scale photovoltaic power generation facility, characterized in that the storage is stored, if the dissatisfaction with the above conditions is displayed by the diagnostic result notification step of informing the diagnostic result.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic configuration diagram of a solar cell module online monitoring diagnostic system of a large-scale photovoltaic power generation facility according to an embodiment of the present invention, the configuration of the present invention largely converts the light energy incident from the sun into electrical energy In a conventional photovoltaic power generation system configured to supply a load, the solar cell module 10 outputs a DC current according to the amount of sunshine, the sensing means 20 for precisely measuring the output current, and the measured current as a digital signal. DAQ module 30 having an A / D converter 30a to collect and then convert the collected data into a wireless signal to wirelessly transmit the radio signal to the outside and convert it into a digital signal. The wireless reception module 42 and the digital signal are stored in an algorithm optimized for climatic conditions, reasonable replacement timing conditions for solar cell modules, and diagnostic conditions for solar cell modules. A calculation processing by a central processing unit (70a), and then comprises a computer 70 which stores the databased.

The photovoltaic power generation system includes a solar cell module 10 that produces light energy incident from the sun as electrical energy and a power controller 200 according to the degree of production of the produced electrical energy in the inverter 300 or the storage battery 100. The electric energy is applied, and the electric energy (direct current) applied to the inverter 300 is converted into an alternating current by a current converter provided in the inverter 300 and is connected to an output side of the refrigerator (A) or TV (B). The current is supplied to the VTR (C), the computer (D), and the fluorescent lamp (E).

The sensing means 20 is connected to the output side of the solar cell module 10 to measure the amount of electrical energy produced by the solar cell module 10. The sensing means 20 may be a current sensor and includes an overcurrent protection circuit equipped with a fuse for the purpose of protecting components connected thereafter from overcurrent generated when the amount of power generation of the solar cell module 10 is large.

The A / D converter 30a converts the analog signal value measured by the sensing means 20 into a digital signal.

The DAQ module 30 includes the sensing means 20 and the A / D converter 30a and collects the digital signals measured by the sensing means 20 and signal-converted by the A / D converter 30a. The DAQ module 30 stands for Data Acquisition, and collects data by measuring physical phenomena such as light, temperature, pressure, sound, and current.

The wireless transmission module 41 is provided for converting the digital signal into a wireless signal and transmitting the signal to the outside.

The radio receiving module 42 is provided to receive a radio signal from the radio transmission module 41 and convert the radio signal back into a digital signal. The digital signal is applied to the central processing unit 70a described later.

The computer 70 may be a web server and a database server, and the inside of the computer 70 may be a central storing algorithm optimized for climatic conditions, reasonable replacement timing conditions of solar cell modules, and diagnostic conditions for solar cell modules. The processing apparatus 70a is provided.

Therefore, the digital signal from the wireless reception module 42 is calculated in the algorithm, and the resultant value is stored in a database. The calculation method is performed as follows.

First, the climatic conditions are premised on the condition that the upper, middle, lower or more subdivided the luminance of the light source absorbed by the solar cell module 10, the rational replacement timing conditions of the solar cell module, respectively, under the premise that the climatic conditions are the same If the amount of power generation of any one of the solar cell modules 11, ..., 17, 18, 19 of the solar cell module 11 is low or insufficient, it is considered to be a replacement time, and the diagnostic condition of the solar cell module Determining that both the climatic conditions and the rational replacement timing conditions of the solar cell module is satisfied, in order to make such a determination, the present invention diagnoses the climatic conditions, the rational replacement timing conditions of the solar cell module, the abnormality of the solar cell module. A statistical database is constructed by aggregating the average amount of power generated by the solar cell module 10 according to the conditions.

Then, an algorithm can be implemented based on such a database, and thus, the digital signal can be applied to the algorithm to perform online monitoring and diagnosis of the solar cell module 10 at a remote location.

An embodiment of the algorithm is as follows.

First, it should be noted that the amount of electricity that the solar cell module 10 can generate according to climatic conditions and the reasonable replacement timing condition of the solar cell module are already databased, and the digital signal is input based on the database. Compare and compare as follows.

What is the current climate condition? If it is sunny during (Sunny, Cloudy, Rain), it is input as sunny from the outside, and if the digital signal is a data value corresponding to sunny, the compared solar cell module determines that there is no abnormality and stores the data value in the database server. However, if the digital signal falls short of the data value corresponding to the clarity, it is determined that there is an abnormality, and the solar cell module corresponding to the digital signal is found, which is also stored in the database server. The algorithm that built the comparison operation can diagnose the solar cell module 10, to find out the solar cell module 10 that has an abnormality, to determine the degree of failure, and to repair and replace as necessary. . On the other hand, such an algorithm is not only limited to help to understand the present invention.

2 is a view showing the flow of the solar cell module online monitoring diagnostic method of a large-scale photovoltaic power generation facility according to another embodiment of the present invention, the ease of maintenance and replacement of the ideal replacement time of the solar cell module 10 and online Online monitoring and diagnosis of solar cell modules in large-scale photovoltaic power generation facilities for data collection and systematic management of data is sufficiently derived by the above description, and supplemented with the above-described computer 70 may be a computer built as a server. In addition, it is possible to monitor the photovoltaic facilities through the network already established by IP sharing function to the connected peripherals and provide such data to the users using each network. On the other hand, the computer 70 may be composed of a database server and a web server. The database server collects data representing the amount of electrical energy produced by the solar cell module 10 using the DAQ module 30 to provide statistical data, abnormal diagnosis data, and real-time data. In addition, the power generation status of the solar cell module 10, the maximum power generation status of each solar cell module 10, etc. are provided as a graph or a table.

As described above, by using the online monitoring and diagnostic method for a solar cell module of a large-scale photovoltaic power generation facility according to an embodiment of the present invention, the abnormality diagnosis algorithm of the module is synthesized by combining the data measured in each solar cell module. It can be derived, thereby determining whether the solar cell module is diagnosed abnormally, and can calculate the economic replacement time of the solar cell module.

In addition, by establishing a database for the systematic management of data, there is an effect to promote the development of related technologies.

Although the invention has been described in connection with the preferred embodiments mentioned above, it will be readily apparent to those skilled in the art that various other modifications and variations can be made without departing from the spirit and scope of the invention. It is obvious that all modifications fall within the scope of the appended claims.

Claims (2)

In a typical photovoltaic system configured to convert light energy incident from the sun into electrical energy and supply it to each load, A plurality of solar cell modules 10 converting and outputting light energy into electrical energy; A / D converter 30a connected to the output side of the plurality of solar cell modules 10 for converting the analog signal measured by the sensing means 20 and the sensing means 20 into a digital signal precisely measuring the electrical energy A DAQ module 30 for collecting the digital signal; A wireless transmission module 41 for converting a digital signal of the DAQ module 30 into a wireless signal and wirelessly transmitting the wireless signal to a wireless reception module 42 to be described later; A radio receiving module 42 for receiving the radio signal and converting the radio signal into a digital signal; And Optimized data are stored in advance in climatic conditions, reasonable replacement timing conditions of the solar cell module, and diagnostic conditions of the solar cell module. Thus, the CPU 70a compares the digital signal with the data value of the comparative operation. And a computer (70) for informing a diagnosis result by displaying a database when the conditions are satisfied and displaying the data when the conditions are not satisfied, and displaying the diagnosis result by displaying the data when the conditions are not satisfied. An energy conversion step of converting light energy into electrical energy and outputting the solar cell module 10 (S100); A signal collection step (S200) of precisely measuring the electrical energy converted as the energy conversion step and converting and collecting the measured analog signal into a digital signal; A wireless transmission step (S300) for converting the collected digital signal into a wireless signal and transmitting it to the outside; A wireless signal reception step and a signal conversion step (S400) for receiving the radio signal transmitted as the radio transmission step and converting the radio signal into a digital signal; Comparing with the digital signal based on the data optimized by climatic conditions, rational replacement timing conditions of the solar cell module, diagnostic conditions of the solar cell module, and if the comparison operation data value satisfies the conditions to make a database The method of monitoring and monitoring the solar cell module of a large-scale photovoltaic power generation facility, comprising: storing and displaying a diagnosis result by informing the diagnosis result by displaying the result of dissatisfaction.

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