KR20140112877A - Monitoring device - Google Patents

Monitoring device Download PDF

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Publication number
KR20140112877A
KR20140112877A KR1020130027519A KR20130027519A KR20140112877A KR 20140112877 A KR20140112877 A KR 20140112877A KR 1020130027519 A KR1020130027519 A KR 1020130027519A KR 20130027519 A KR20130027519 A KR 20130027519A KR 20140112877 A KR20140112877 A KR 20140112877A
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KR
South Korea
Prior art keywords
slave
solar
master
sensing data
current
Prior art date
Application number
KR1020130027519A
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Korean (ko)
Inventor
강미선
강현우
최은창
Original Assignee
한국전자통신연구원
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Application filed by 한국전자통신연구원 filed Critical 한국전자통신연구원
Priority to KR1020130027519A priority Critical patent/KR20140112877A/en
Publication of KR20140112877A publication Critical patent/KR20140112877A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G01R19/2513—Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C25/00—Arrangements for preventing or correcting errors; Monitoring arrangements

Abstract

A monitoring device according to an embodiment of the present invention includes a master device which generates first sensing data by detecting an output voltage or an output current of a first photovoltaic array; and at least one slave device which is connected to the master device by a serial expansion port, generates second sensing data by detecting an output current of a second photovoltaic array, and transmits the second sensing data to the master device. The master device transmits the first sensing data and the second sensing data to a wireless network.

Description

{MONITORING DEVICE}

The present invention relates to a monitoring apparatus, and more particularly to an apparatus for monitoring a solar array in a solar power generation system.

Research and development on many new and renewable energy fields such as solar power, wind power, small hydro power, and fuel conversion are being actively carried out in various countries around the world in order to utilize it as a measure to diversify the future of the future energy source. As the spread of solar power generation has expanded, research and development of solar power generation related products have been actively carried out in our country.

The photovoltaic power generation facility outputs the output of the photovoltaic array as DC power and supplies power to the grid line or AC load through the power inverter (inverter). However, in the case of solar power generation facilities, the major components of solar modules and power conversion devices (inverters) are tested after in-house testing by the manufacturer and after performance certification at the performance certification institute, the reliability of the product is ensured. However, there is no adequate monitoring method for photovoltaic arrays, which is the core of photovoltaic systems. Therefore, when a defect occurs in the solar array, it is not possible to properly cope with it, and the power generation efficiency may be greatly reduced.

In addition, the solar array has to be installed in a place where the sunlight can directly enter. Therefore, in order to check the solar array when the photovoltaic system is installed at a remote place or when a solar array is installed to enlarge the scale, the labor and effort of the operator must be accompanied.

A problem to be solved by the present invention is to provide a monitoring technique capable of measuring and checking the performance of a solar array according to the situation of a solar power generation system.

According to an embodiment of the present invention, a monitoring device is provided. The monitoring apparatus includes a master device for sensing an output voltage or an output current of the first solar array and generating first sensing data; And at least one slave device connected to the master device through a serial expansion port to generate second sensing data by sensing an output current of the second solar array and transmitting the second sensing data to the master device do. The master device transmits the first sensing data and the second sensing data to a wireless network.

According to the embodiment of the present invention, it is possible to monitor the performance of the solar array in the photovoltaic power generation system from a remote place, and to detect the failure of the solar array.

In addition, according to the embodiment of the present invention, when the solar array is added to the solar power generation system, the solar array can be easily monitored without problems of labor and time consumption. Thereby minimizing the construction cost of the PV system.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows an embodiment of a solar power generation system.
2 shows a monitoring network (or monitoring system) for monitoring a solar power generation system.
FIG. 3 illustrates an embodiment of the gateway 500 of FIG. 2; FIG.
4 is a diagram showing a configuration of a sensor monitoring apparatus according to an embodiment of the present invention.
5 is a front view of a sensor monitoring apparatus according to an embodiment of the present invention.
6 is a rear view of a sensor monitoring apparatus according to an embodiment of the present invention.
7 is a rear view of the master unit 710 shown in Fig. 6. Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

1 is a diagram showing an embodiment of a solar power generation system.

A plurality of solar panels (PV panels) 110_1 to 110_N, 120_1 to 120_N, and 130_1 to 130_N are connected in series to constitute one solar array 110, 120, and 130, respectively. The solar panels 110_1 to 110_N, 120_1 to 120_N, and 130_1 to 130_N collect the energy from the sunlight to produce electric power. In FIG. 1, three solar arrays 110, 120, and 130 are shown for convenience of explanation. A plurality of solar arrays 110, 120 and 130 are connected in parallel through a junction box 210 (more specifically through terminal boxes 211 and 212). The power (voltage and current) produced by each of the solar arrays 110, 120 and 130 is collected through the connection box 210 and transferred to the inverter 300. In FIG. 1, the solar array connected to the connection boxes 220, 230, and 240 is omitted for convenience of explanation.

The inverter 300 converts the power received from the connection boxes 210, 220, 230, and 240 into AC power. The AC power converted by the inverter 300 is supplied to a load connected to the solar power generation system.

Meanwhile, the sensor monitoring apparatus according to the embodiment of the present invention is installed inside the connection boxes 210, 220, 230, and 240. The sensor monitoring apparatus monitors the solar arrays 110, 120, and 130 by sensing output voltages or output currents of the solar arrays 110, 120, and 130.

2 is a diagram of a monitoring network (or monitoring system) for monitoring a solar power generation system.

The N sensor monitoring apparatuses 400_1 to 400_6 are wirelessly connected to the gateway 500. [ In FIG. 2, six sensor monitoring devices 400_1 to 400_6 are wirelessly connected to the gateway 500 for convenience of explanation. Each of the sensor monitoring devices 400_1 to 400_6 transmits the output voltage / current information of the sensed solar arrays 110, 120 and 130 to the gateway 500 through the internal wireless communication module.

The gateway 500 transmits the received voltage / current information to the host computer 600 connected to the Internet.

The host computer 600 determines whether there is a defective solar array (or a solar panel) among the plurality of solar arrays 110, 120, and 130 using the received voltage / current information. For example, if the voltage / current value of the solar array 110 received by the host computer 600 is significantly lower than the voltage / current value of the other solar arrays 120 and 130 received, the host computer 600 Recognizes that there is a problem with the solar array 110 or some of the panels of the solar array 110.

3 is a diagram illustrating an embodiment of the gateway 500 shown in FIG.

The gateway 500 includes a wireless communication module 510 for wireless communication with the sensor monitoring devices 400_1 to 400_6, a main CPU 520 for controlling operations, an Ethernet 530, and a USB 540.

4 is a diagram showing a configuration of a sensor monitoring apparatus 400_1 according to an embodiment of the present invention.

The sensor monitoring apparatus 400 _ 1 includes a master unit 410 and a slave unit 420.

The master unit 410 includes a master MCU 411, a plurality of slave MCUs 412_1 and 412_2, a plurality of current sensor modules 413_1 and 413_2, a voltage sensor 414, a temperature sensor 415, Communication module 416 and serial expansion port 417. [

The slave unit 420 includes a plurality of slave MCUs 421_1 and 421_2, a plurality of current sensor modules 422_1 and 422_2, and a serial expansion port 423. The master unit 410 and the slave unit 420 are connected through the serial expansion ports 417 and 423. 4, one slave unit 420 is connected to the master unit 410. However, the N slave units 420 may be connected to the master unit 410. For example, When a solar array is added to the PV system, the slave unit for monitoring the added solar array is connected to the master unit 410 via a serial expansion port (e.g., 417, 423). In this way, the sensor monitoring apparatus according to the embodiment of the present invention can expand and monitor 16 channels (solar array) to 32 channels, 48 channels, 64 channels, and the like.

The master MCU 411 and the slave MCUs 412_1 to 412_2 and 421_1 to 412_2 are connected to each other through a serial interface by serial expansion ports 417 and 423. The master MCU 411 serves as a master of the serial interface, and each of the slave MCUs 412_1 through 412_2 and 421_1 through 412_2 serves as a slave of the serial interface. When a power source (VCC / GND voltage) is supplied to the master unit 410, the power is transmitted to the slave unit 420 through the serial expansion ports 417 and 423. Meanwhile, the illuminance sensor unit may be designed to be connected to the master unit 410 via the serial expansion ports 417 and 423. [

Each of the master unit 410 and the slave unit 420 may include N slave units 412_1 to 412_2 and 421_1 to 421_2. In FIG. 4, a master unit 410 and a slave unit 420 ) Each include two slave MCUs 412_1 to 412_2, 421_1 to 421_2. In this case, each of the slave MCUs 412_1 to 412_2, 421_1 to 421_2 may be designed to monitor eight solar arrays.

Each of the current sensor modules 413_1 to 413_2 and 422_1 to 422_2 senses a current output from the solar array 110 connected to the solar array 110, 120, or 130 itself.

Each of the slave MCUs 412_1 to 412_2 and 421_1 to 421_2 controls the current sensor modules 413_1 to 413_2 and 422_1 to 422_2 connected thereto. Each of the slave MCUs 412_1 to 412_2 and 421_1 to 421_2 is always in a reception standby state, and when the master MCU 411 issues an instruction, the slave MCU 412_1 to 421_2 performs an operation according to the instruction. Specifically, when the master MCU 411 requests the measured value of the sensor, the slave MCUs 412_1 to 412_2 and 421_1 to 421_2 measure current values through the current sensor modules 413_1 to 413_2 and 422_1 to 422_2, Value to the master MCU 411. Each of the slave MCUs 412_1 to 412_2 and 421_1 to 421_2 transmits the measured current value to the master MCU 411 via the serial interface.

The master MCU 411 controls the overall operation of the sensor monitoring apparatus 400_1. Specifically, the master MCU 411 controls the voltage sensor 414 and the temperature sensor 415 connected thereto, and collects current values from the slave MCUs 412_1 to 412_2 and 421_1 to 421_2. The master MCU 411 transmits the collected information (e.g., current / voltage value, temperature) to the wireless communication module 416. That is, the master MCU 411 receives the voltage values output from the solar arrays 110, 120, and 130 and the temperature of the solar arrays 110, 120, and 130 through the voltage sensor 414 and the temperature sensor 415, And transmits the sensed voltage value and the temperature value to the gateway 500 together with the current value received from the slave MCUs 412_1 to 412_2 and 421_1 to 421_2. Meanwhile, the temperature sensor 415 and the master MCU 411 may be designed to communicate through a UART (Universal Asynchronous Receiver Transmitter).

The wireless communication module 416 transmits information (e.g., current value, voltage value, temperature information) to the gateway 500 over the wireless link. The main CPU 520 of the gateway 500 collects the transmitted information (e.g., current value, voltage value, and temperature information). The gateway 500 transmits the collected information to the host computer 600.

Meanwhile, each of the master MCU 411 and the slave MCUs 412_1 to 412_2, 421_1 to 421_2 is divided into a unique ID. This will be described with reference to FIG.

5 is a front view of a sensor monitoring apparatus according to an embodiment of the present invention. 5 is a front view of the master unit 410 of FIG.

The master unit 410 may further include a DC-DC converter 418 for maintaining the output voltage constant, a dual in-line package (DIP) switch 419 and a power module PW.

The power module PW receives power from the outside and manages the supplied power.

The dip switch 419 sets an ID for distinguishing the sensor monitoring devices 400_1 to 400_6 and an ID for distinguishing the master MCU 411 and the slave MCUs 412_1 to 412_2 and 421_1 to 421_2. The switch of the dip switch 419 may be designed to recognize the ON state as 1 and recognize the OFF state as OFF. For example, the IDs of the gateway 500 and the sensor monitoring devices 400_1 to 400_6 can be set using switches 2 to 7 of the dip switch 419 as shown in Table 1 below. Table 2 below shows IDs of the gateway 500 and the sensor monitoring devices 400_1 to 400_6, respectively.

A table for setting the IDs of the gateway 500 and the sensor monitoring devices 400_1 to 400_6 Bit7 (MSB) 6 5 4 3 2 One Bit0 (LSB) ID (0 to 255)

A table showing the IDs of the gateway 500 and the sensor monitoring devices 400_1 to 400_6 division Contents 0 to 62 Sensor monitoring device ID 63 Gateway ID 255 Broadcast ID from the gateway

On the other hand, the master MCU (for example, 411) and the slave MCU (for example, 412_1 to 412_2, 412_1 to 412_2) in the specific sensor monitoring apparatus (for example, 400_1) by using switches 0 to 1 of the dip switch 419, 421_1 to 421_2) can be set. Table 4 below is a table showing the IDs of the master MCU (e.g., 411) and the slave MCUs (e.g., 412_1 to 412_2, 421_1 to 421_2) in the specific sensor monitoring apparatus (e.g., 400_1). The first to third slave units in Table 4 refer to slave units (e.g., 420) connected to a master unit (e.g., 410) via a serial expansion port.

Table for setting the ID of the master MCU / slave MCU in the specific sensor monitoring device Bit7 (MSB) 6 5 4 3 2 One Bit0 (LSB) MCU ID

A table showing the IDs of master MCU / slave MCUs in a specific sensor monitoring device division Contents 0 to 1 Slave MCU ID in master unit 2 to 3 The slave MCU ID in the first slave unit 4 to 5 The slave MCU ID in the second slave unit 6 to 7 The slave MCU ID in the third slave unit 15 Master MCU ID 255 Broadcast ID from master MCU

6 is a rear view of a sensor monitoring apparatus according to an embodiment of the present invention. 6 illustrates a case where a sensor monitoring apparatus (e.g., 400_2) includes a master unit 710 and two slave units 720 and 730 for convenience of explanation. The master unit 710 and the slave units 720 and 730 are connected to each other through an extension communication line (a line connected to the serial expansion port). The master unit 710 is configured the same as the master unit 410 of FIG. 4, and each of the slave units 720 and 730 is configured in the same manner as the slave unit 420 of FIG. Power is supplied from the master unit 710 to the slave units 720 and 730 via the extended communication line when power is supplied from the outside to the master unit 710. [

The master unit 710 includes a voltage port to which the output voltage of the solar array connected to the master unit 710 is supplied and a current port to which the output current of the solar array connected to the master unit 710 is supplied.

Each of the slave units 720 and 730 includes a current port to which the output current of the solar array connected to the slave units 720 and 730 is supplied.

7 is a view showing a rear surface of the master unit 710 shown in FIG.

The master unit 710 includes a current port, a shunt for classifying current in the current measurement, and a voltage port. And collects the output voltage / current value of the solar array connected to the master unit 710 through the sixteen current port pairs and one voltage port pair of the master unit 710. [

Through the sensor monitoring apparatus according to the embodiment of the present invention, it is possible to monitor the power generation of the photovoltaic generation system from a remote place in real time by detecting the output voltage / current produced from the solar array (for example, 110, 120, 130) . That is, the sensor monitoring apparatus according to the embodiment of the present invention automatically detects a solar array that does not operate normally among a plurality of solar arrays, and performs replacement / repair of a defective solar array (specifically, a solar panel) The solar power generation system can be maintained.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

400_1 to 400_6: Sensor monitoring device 410: Master unit
420: Slave unit 411: Master MCU
412_1 to 412_2, 421_1 to 421_2: Slave MCU
413_1 to 413_2, 422_1 to 422_2: Current sensor module
414: voltage sensor 415: temperature sensor
416: Wireless communication module 417, 423: Serial expansion port

Claims (1)

A master device for sensing an output voltage or an output current of the first solar array and generating first sensing data; And
And at least one slave device connected to the master device through a serial expansion port to generate second sensing data by sensing the output current of the second solar array and transmitting the second sensing data to the master device ,
The master device transmits the first sensing data and the second sensing data to a wireless network
Monitoring device.
KR1020130027519A 2013-03-14 2013-03-14 Monitoring device KR20140112877A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101709519B1 (en) * 2016-07-11 2017-02-24 주식회사 이엔제이 Passive DAS monitoring systemf
WO2017177604A1 (en) * 2016-04-13 2017-10-19 苏州瑞得恩自动化设备科技有限公司 Fault detection and positioning system for cell panel in large-scale photovoltaic array

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017177604A1 (en) * 2016-04-13 2017-10-19 苏州瑞得恩自动化设备科技有限公司 Fault detection and positioning system for cell panel in large-scale photovoltaic array
US10418936B2 (en) 2016-04-13 2019-09-17 Suzhou Radiant Photovoltaic Technology Co., Ltd. Fault detection and positioning system for cell panel in large-scale photovoltaic array
KR101709519B1 (en) * 2016-07-11 2017-02-24 주식회사 이엔제이 Passive DAS monitoring systemf

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