KR101212124B1 - Monitoring system for photovoltaic electric power station - Google Patents

Abstract

The photovoltaic power plant monitoring system according to the present invention comprises: image devices installed adjacent to each of the power generation components to obtain respective image information about power generation components of the photovoltaic power plant; A local monitoring device for transmitting image information obtained from the image devices through a network constructed in advance; And a central monitoring device for diagnosing each state of the power generation components based on the image information transmitted through the network. As a result, the present invention obtains not only monitoring information but also image information from a power plant located at a remote location by installing an image device in a power plant, so that remote diagnosis can be performed more accurately and quickly.

Description

Solar Power Plant Monitoring System {MONITORING SYSTEM FOR PHOTOVOLTAIC ELECTRIC POWER STATION}

The present invention relates to a photovoltaic power plant monitoring system, and more particularly, to a photovoltaic power plant monitoring system capable of diagnosing a state of a photovoltaic power plant at a remote location.

Recently, with the seriousness of global environmental problems and the growing interest in them, researches on energy saving methods to suppress CO2 emissions have been actively conducted, especially for electric energy such as solar power, tidal power and wind power. The necessity of renewable energy is emerging.

Generally, a solar power plant converts electricity (DC) generated by solar light in a solar cell module from an inverter to a direct current (AC), boosts it from an AC switchboard, and transmits it to a power system through a power distribution system.

On the other hand, recently, the supply of solar power generation plants has been rapidly increasing, and solar power generation plants have been actively installed not only in domestic but also overseas. Accordingly, conventional solar power plant monitoring systems that perform only monitoring and alarm generation functions have a limitation in efficiently managing and diagnosing solar power plants that are dispersed and installed at a remote location.

In particular, when the recovery of the photovoltaic plant installed overseas is delayed, the greater the damage is expected, the conventional photovoltaic power plant monitoring system has a problem that it is difficult to properly deal with the failure until the engineer arrives on site.

Therefore, an object of the present invention is to provide a photovoltaic power plant monitoring system capable of real-time monitoring and appropriate measures in the event of a failure when a photovoltaic power plant is installed in a foreign or mountain wallpaper.

In order to solve the above problems, the photovoltaic power plant monitoring system according to the first aspect of the present invention is provided with image devices installed adjacent to each of the power generation components to obtain respective image information about the power generation components of the photovoltaic power plant. ; A local monitoring device for transmitting image information obtained from the image devices through a network constructed in advance; And a central monitoring device for diagnosing each state of the power generation components based on the image information transmitted through the network.

In order to solve the above problems, the photovoltaic power plant monitoring system according to the second aspect of the present invention includes image devices installed adjacent to each of the power generation components to obtain respective image information about power generation components of the photovoltaic power plant. ; A local monitoring apparatus for monitoring an operating state of the photovoltaic power plant and transmitting the monitoring information together with image information obtained from the image apparatuses through a network previously established; And a central monitoring device for diagnosing each state of the power generation components based on the monitoring information and the image information transmitted through the network.

In the photovoltaic power plant monitoring system according to the first or second feature, the central monitoring apparatus includes a diagnostic information DB for storing diagnostic information corresponding to each of the power generation configurations, and the image information for each power generation configuration. And a central control unit for classifying and extracting diagnostic information corresponding to each of the classified power generation components from the diagnostic information DB and displaying the classified image information together with the classified image information. The central control unit of the central monitoring apparatus may transmit the diagnostic information through the network, and the local monitoring apparatus may display the diagnostic information transmitted through the network together with the image information.

In the photovoltaic power plant monitoring system according to the first or second aspect, the central monitoring apparatus includes the abnormal symptoms corresponding to each of the power generation components and the action information corresponding to each of the abnormal symptoms. And a central control unit for classifying the image information by the power generation components, extracting the action information corresponding to the power generation components from the action information DB, and displaying the image information together with the classified image information. Can be. The central control unit of the central monitoring apparatus may transmit the action information through the network, and the local monitoring apparatus may display the action information transmitted through the network together with the image information.

In the photovoltaic power plant monitoring system according to the first or second feature, the central monitoring apparatus includes a diagnostic pattern information DB for storing diagnostic pattern information corresponding to each of the abnormal symptoms, and the diagnostic pattern information DB from the diagnostic pattern information DB. The central control unit extracts diagnostic pattern information and compares the transmitted image information with the power generation configuration to determine whether there is an abnormality, and expresses abnormality information calculated by the abnormality determination result together with the transmitted image information. It may include. The central control unit of the central monitoring apparatus may transmit the abnormality information through the network, and the local monitoring apparatus may express the transmitted abnormality information together with the image information.

In the solar power plant monitoring system according to the second aspect, the central monitoring apparatus, the central monitoring apparatus may diagnose the state of the power generation components based on any one of the monitoring information and image information.

In the photovoltaic power plant monitoring system according to the first or second features, the local monitoring apparatus includes a diagnostic information DB for storing diagnostic information corresponding to each of the power generation components, and a corresponding power generation configuration. Action information DB for storing abnormal symptoms and action information corresponding to each of the abnormal symptoms, a diagnostic pattern information DB for storing diagnostic pattern information corresponding to each of the abnormal symptoms, and the diagnosis information DB and action information Extracting each of the diagnostic information and the action information for each of the power generation components from a DB, and extracting the diagnosis pattern information from a diagnosis pattern information DB to compare the obtained image information with each power generation configuration to calculate abnormality information. And a local control unit, wherein the central monitoring device comprises a diagnostic information DB and an action information DB provided in the local monitoring device. Only the pattern information DB can be updated through the network.

The photovoltaic power plant monitoring system according to the present invention can provide more accurate and rapid maintenance since the imaging device is installed in a power plant to obtain not only monitoring information but also image information from a remote power station and perform remote diagnosis.

In addition, the photovoltaic power plant monitoring system according to the present invention makes it possible to utilize previously prepared diagnostic information, action information, and diagnostic pattern information in a local monitoring apparatus installed in a power plant, and supports updating of these information through a central monitoring apparatus. Can improve the reliability.

1 is a block diagram of a solar power plant monitoring system according to the first and second embodiments of the present invention.
2 is a block diagram of a central monitoring apparatus according to a first embodiment of the present invention.
3 is a diagram illustrating an example of a screen implemented using monitoring information collected from power generation configurations according to the first embodiment of the present invention.
4 is a view for showing the setting criteria of the monitoring information according to the first embodiment of the present invention.
5 is a view for showing the setting criteria of the diagnostic pattern information according to the first embodiment of the present invention.
6 is a control flowchart of a photovoltaic power plant monitoring system according to a first embodiment of the present invention.
7 is a block diagram of a local monitoring apparatus according to a second embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail embodiments of the present invention. 1 is a block diagram of a photovoltaic power plant monitoring system according to the first and second embodiments of the present invention.

As illustrated in FIG. 1, the photovoltaic power plant monitoring system 100 according to the first embodiment of the present invention includes the image devices 110 disposed adjacent to each of the power generation components E of the power plant P. FIG. The central monitoring device 130 is connected to the local monitoring device 120 through the network N and the local monitoring device 120 for monitoring the state of the power generation configuration E.

In the case where the power plant P according to the present embodiment is assumed to be a photovoltaic power plant, the power generation configurations E may include a solar array E1, a connection panel E2, an inverter E3, and a low voltage as shown in FIG. Half (E4), transformer plate (E5), high pressure plate (E6), LBS (E7), the electric field system (E8) and the like. Each power generation component (E) is connected with the local monitoring device 120 in accordance with the cooperation agreement previously agreed. The local monitoring device 120 may be linked with a peripheral device in a local manner, or may be linked with the Internet through a web method, and may be connected wirelessly or by wire. Although not shown in FIG. 1, the local monitoring apparatus 120 may also be connected to meteorological sensor modules to obtain information related to the weather.

FIG. 2 is a block diagram showing, for example, a criterion for setting monitoring information corresponding to the power generation components E, which is an operation for each power generation component E before the power plant P is installed. This can be determined by reflecting the characteristics and knowledge and experience of operating the power generation system. These criteria can be changed in various ways.

The monitoring information will be described taking the solar array E1, which is one of the power generation configurations E, as an example. The setting criteria of the monitoring information for the solar array E1 is the output from the solar array E1 as shown in FIG. 2. The monitoring information under this criterion may include overvoltage monitoring information generated when the voltage output from the solar array E1 is greater than or equal to a predetermined value, and low voltage monitoring information generated when the output voltage is less than the prescribed. In addition, other monitoring information may be set in consideration of operating characteristics of the solar array E1.

The following table 1 shows the remote diagnosis of the photovoltaic power generation system, and is prepared in advance based on the experience and knowledge obtained through the operation of the photovoltaic power plant. The photovoltaic power plant monitoring system 100 according to the present embodiment may be implemented by reflecting such remote diagnosis details.

Monitoring signal Monitoring representation Remote diagnosis Action Solar cell overvoltage Solar Cell OV fault H / W occurs when the voltage of solar cell is over Restart after 5 minutes of normal operation Solar cell low voltage Solar Cell UV fault H / W generated when solar cell voltage is below specified Restart after 5 minutes of normal operation Solar cell overvoltage limit exceeded Solar Cell OV limit fault S / W generated when solar cell voltage is over Restart after 5 minutes of normal operation Solar cell low voltage exceeded Solar Cell UV limit fault S / W occurs when the voltage of solar cell is below specified Restart after 5 minutes of normal operation KEPCO system reverse Line phase sequence fault Occurs when the grid voltage is reversed Restart after normal operation Electric field R phase Line R phase fault Occurred when R phase missing Normal operation after checking R phase System S phase Line S phase fault Occurs when missing S phase Restart after normal operation after checking S phase System T phase Line T phase fault Occurs when T phase is missing Normal operation after T phase check KEPCO Input Power Utility line fault Occurred during power outage Restart after 5 minutes of normal operation KEPCO Overvoltage Line over voltage fault Occurs when the grid voltage is above the specified value Restart after 5 minutes of normal operation KEPCO Undervoltage Line under voltage fault Occurs when the grid voltage is below the specified value Restart after 5 minutes of normal operation KEPCO low frequency Line under frequency fault Occurs when the grid frequency is below the specified value Restart after 5 minutes of normal operation Electric field and frequency Line over frequency fault Occurs when the grid frequency is above the specified value Restart after 5 minutes of normal operation Inverter Overcurrent Inverter over current fault Occurs when the inverter current flows over the specified value Operation after repair of fault or system check after system stop Inverter over temperature Inverter over temperature Occurs when the inverter overheats Operation after checking inverter and fan Inverter MC Inverter M / C fault Electronic contactor breakdown Operation after replacement of magnetic contactor Inverter output voltage Inverter voltage fault Occurs when the inverter voltage is out of the specified voltage Operation after checking inverter and grid voltage Inverter fuse Inverter fuse fault Inverter fuse extinguished Operation after checking fuse replacement Phase: KEPCO Inverter Line Inverter async fault Occurs when the frequency of inverter and grid is out of sync Operation after inverter check or grid frequency check Leakage Inverter ground fault Occurs when a short circuit in the inverter occurs Operate after repairing the faulty part of inverter and load or checking ground resistance RTU communication system error Serial communication fault Occurs when there is no communication between the inverter and MMI Check the connection terminal (inverter operates normally)

The local monitoring apparatus 120 may implement the monitoring screen as shown in FIG. 3 by using the monitoring information collected from the power generation components (E). Although not shown in FIG. 1, the local monitoring apparatus 120 may include a display unit for displaying such a monitoring screen. In the monitoring means, the display unit is a general configuration as a means for transmitting information to the user, and thus a detailed description thereof will be omitted.

When the monitoring screen as shown in FIG. 3 is implemented in the touch panel, the user may obtain monitoring information on the desired configuration through the screen by touching the screen of the configuration to be monitored on the screen. The display unit (not shown) provided in the local monitoring apparatus 120 may implement a monitoring screen in the form of various tables and graphs.

The local monitoring apparatus 120 may implement a monitoring screen using the weather observation information collected from the weather observation sensor module as well as the monitoring information on the power generation configuration (E) as described above.

The image device 110 is disposed adjacent to the power generation configurations E, and acquires image information for each power generation configuration E based on a predetermined setting. The installation place and the number of the image device 110 may be provided in various ways.

In addition, the image apparatus 110 may change a setting for image acquisition under the control of the local monitoring apparatus 120. That is, the image device 110 may change its position or perform zoom up and zoom out operations under the control of the local monitoring device 120.

The imaging apparatus 110 may be provided as a CCD camera, and may be used in various kinds and various operation modes according to the use and installation environment of the photovoltaic power plant monitoring system 100. That is, an infrared filter may be applied to the CCD camera to obtain thermal image information, and still image and video information may be selectively acquired. Hereinafter, the central monitoring apparatus 130 will be described with reference to FIG. 4.

The central monitoring apparatus 130 may be generally disposed at a position away from the power plant P, and may be linked with the local monitoring apparatus 120 installed at the power plant P through a network N previously built. When using the Internet, the user can diagnose the operating state of the power plant (P) installed thousands of kilometers away through the central monitoring device (130).

As shown in FIG. 4, the central monitoring apparatus 130 includes a diagnosis information DB 132, an action information DB 134, a diagnosis pattern information DB 136, and a central control unit 138. It is possible to diagnose the state of the power generation configuration (E) based on the monitoring information and the image information transmitted through.

The diagnostic information DB 132 operates under the control of the central control unit 138 and stores diagnostic information corresponding to the power generation components E. FIG. The diagnostic information may be provided as text, voice, or shape information as a diagnostic guide corresponding to each of the power generation components (E).

The action information DB 134 stores abnormal symptoms corresponding to the power generation components E and action information corresponding to each of the abnormal symptoms. The abnormal symptoms may be provided as text, voice, or shape information as abnormal symptoms corresponding to the respective power generation components (E). In addition, action information may be provided as text, voice, or shape information as a maintenance guide corresponding to abnormal symptoms. Diagnostic information and action information may be determined by reflecting the operation characteristics of each power generation configuration (E) and the operation mode of the power generation system.

The diagnostic pattern information DB 136 stores diagnostic pattern information corresponding to abnormal symptoms. The diagnosis pattern information may be provided by a diagnosis point determined by reflecting an operation characteristic of each power generation configuration (E) and an operation mode of the power generation system.

Table 2 below shows an example of the remote diagnosis by the imaging apparatus, which can be prepared in advance based on the experience and knowledge obtained through the operation of the solar power plant. The photovoltaic power plant monitoring system 100 according to the present embodiment may be implemented by reflecting the contents of Table 2.

Symptom Diagnosis contents using image camera Action Reduced output due to external factors


-Check for shadows around the solar cell module
-Possibility of explosion and fire hazard around solar cell module Remove and move -Solar cell module surface damage inspection
-Inspection of the presence of impurities on the surface of solar cell module Module replacement removal and
Water cleaning -Inspection of external deformation of solar cell module
-Check the status of derailment on the connection of solar cell module Module replacement calibration and
substitute -Inspection of gap between solar cell module and structure
-Corrosion inspection inside and outside the solar cell module Tightening and Calibration Module Replacement Power loss due to lightning -External inspection when plant stops due to weather Remove and replace Power degradation due to poor solar cell -Inspection of array output degradation due to microcracks
-Diagnosis of output degradation caused by using defective cell in manufacturing
-Status of output reduction due to aging of solar cell
Remove and replace

Figure 5 defines the diagnostic point for the solar array, can be determined by the diagnostic information and action information in Table 2. In the case of other power generation components E, such a diagnostic point can be defined in advance.

The central control unit 138 controls the overall operation of the central monitoring device 130, and diagnoses the status of each power generation configuration (E) based on the monitoring information and image information transmitted through the network (N) and informs the user. It mainly performs a function.

The central controller 138 may be operated in a first diagnosis mode using only image information, a second diagnosis mode using only monitoring information, and a third mode using both image information and monitoring information at the user's selection. Hereinafter, a description will be given of a first mode utilizing only image information, with reference to FIG. 6.

When the first mode is selected by the user, the central controller 138 classifies the image information received through the network N by the power generation configuration E (S510). In addition, when the user is selected to display the diagnostic information and the action information, the central control unit 138 extracts the diagnostic pattern information corresponding to each of the power generation components (E) from the diagnostic pattern information DB 136 to classify the image classified in step S510. Compared with the information to determine the abnormality by the power generation configuration (E) and calculates the abnormality information based on the abnormality determination result (S520).

The central controller 138 extracts diagnostic information corresponding to the power generation components E from the diagnostic information DB 132, and extracts action information from the action information DB 134 (S530). In addition, the central controller 138 displays the abnormality information calculated in step S520, the diagnostic information and the action information extracted in step S530 together with the corresponding image information (S540).

In addition, the operation of the central controller 138 may be variously operated according to the user. For example, the user may normally operate in the second diagnostic mode using only the monitoring information, and if necessary, change to the third diagnostic mode in which the image information and the monitoring information can be simultaneously used.

Hereinafter, a solar power plant monitoring system 200 according to a second embodiment of the present invention will be described. The photovoltaic power plant monitoring system 200 according to the present embodiment has the same components as the first embodiment in appearance, as shown in FIG. 1. In other words, the present photovoltaic power plant monitoring system 200 is a local monitoring device 220 for monitoring the status of the image device 210, the power generation configuration (E) disposed adjacent to each of the power generation configuration (E) of the power plant (P) And the central monitoring device 230 is connected to the local monitoring device 220 and the network (N).

However, the photovoltaic power plant monitoring system 200 according to the present embodiment has the functions of the central monitoring apparatus 230 according to the above-described embodiment as shown in FIG. 7. Perform.

The local monitoring apparatus 220 includes a diagnostic information DB 222, an action information DB 224, a diagnostic pattern information DB 226, and a local control unit 228. Herein, the local controller 228 generates each of the diagnostic information and the action information from the diagnosis information DB 222 and the action information DB 224 based on the image information acquired by the image devices 210 (E). ) And the diagnostic information and the action information together with the extracted image information can be expressed by the power generation configuration (E).

In addition, the local controller 228 extracts the diagnostic pattern information from the diagnostic pattern information DB 226, compares the image information with each of the power generation configurations (E), and calculates abnormality information, and calculates the calculated information with the obtained image information. Can be expressed together.

In addition, the DBs 222, 224, 226 of the local monitoring apparatus 220 according to the present embodiment may be updated by the support of the central monitoring apparatus 230 connected through the network N.

As such, the diagnostic performance of the local monitoring apparatus 220 installed in the power plant P is improved by the photovoltaic power plant monitoring system 200 according to the present embodiment, and the environment and the power generation components E of the power plant P after installation are improved. In response to the change, the local monitoring apparatus 220 may be updated.

On the other hand, the network (N) used in the present embodiment may be established by wired or wireless Internet. That is, the network N may be implemented by VHF / UHF, dedicated line, CDMA, VSAT, xDSL, telephone line, and the like, and may use various protocols such as PPP, Telnet, TCP / IP, ICMP, HTTP, and the like. In this case, the user can access the network N according to the present embodiment through the portable terminal.

100,200: photovoltaic power plant monitoring system 110,210: imaging device
120,220: local monitoring device 130,230: central monitoring device
132,222: Diagnostic information DB 134,224: Action information DB
136,226: diagnostic pattern information DB 138: central control unit
228: local control unit

Claims (10)

Image devices installed adjacent to each of the power generation components of the solar power plant to obtain image information on the power generation components;
A local monitoring apparatus which transmits image information obtained by the image apparatuses through a network and compares the image information with information of respective DBs to calculate abnormality information of each of the power generation components; And
A central monitoring device for diagnosing a state of each of the power generation components by analyzing image information transmitted from the local monitoring device;
The local monitoring device,
A diagnostic information DB for storing diagnostic information corresponding to each of the power generation components;
An action information DB for storing abnormal symptoms corresponding to each of the power generation components and action information corresponding to each of the abnormal symptoms;
A diagnostic pattern information DB for storing diagnostic pattern information corresponding to each of the abnormal symptoms; And
The diagnostic information and the action information for each of the power generation components are extracted from the diagnosis information DB and the action information DB, and the diagnostic pattern information is extracted from the diagnosis pattern information DB to compare the obtained image information with the power generation configuration. Local control unit to calculate the presence information
Photovoltaic power plant monitoring system, characterized in that consisting of. Image devices installed adjacent to each of the power generation components of the solar power plant to obtain image information on the power generation components;
Monitor the operation status of the photovoltaic power plant and transmit the monitoring information together with the image information obtained from the image apparatuses through a network and compare and analyze the image information with the information of respective DBs to determine the abnormality of the respective power generation components. A local monitoring device for calculating presence information; And
A central monitoring device for diagnosing a state of each of the power generation components by analyzing image information transmitted from the local monitoring device;
The local monitoring device,
A diagnostic information DB for storing diagnostic information corresponding to each of the power generation components;
An action information DB for storing abnormal symptoms corresponding to each of the power generation components and action information corresponding to each of the abnormal symptoms;
A diagnostic pattern information DB for storing diagnostic pattern information corresponding to each of the abnormal symptoms; And
The diagnostic information and the action information for each of the power generation components are extracted from the diagnosis information DB and the action information DB, and the diagnostic pattern information is extracted from the diagnosis pattern information DB to compare the obtained image information with the power generation configuration. Local control unit to calculate the presence information
Photovoltaic power plant monitoring system, characterized in that consisting of. delete delete delete delete The method according to claim 1 or 2,
The central monitoring device,
A diagnostic pattern information DB for storing diagnostic pattern information corresponding to each of the abnormal symptoms; And
Extracting diagnostic pattern information from the diagnostic pattern information DB and comparing the transmitted image information with the power generation configuration to determine whether there is an abnormality and the abnormality information calculated by the abnormality determination result and the transmitted image information. Central control unit expressing together
Photovoltaic power plant monitoring system, characterized in that consisting of. The method of claim 7, wherein
The central control unit of the central monitoring device transmits the abnormality information through the network,
The local monitoring device is a photovoltaic power plant monitoring system, characterized in that for displaying the transmitted abnormality information with the image information. delete The method according to claim 1 or 2,
The central monitoring device is a photovoltaic power plant monitoring system, characterized in that for updating the diagnostic information DB, the action information DB and the diagnostic pattern information DB provided in the local monitoring device through the network.

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