CN108663088A - Intelligent photovoltaic power station distribution cloud monitors system - Google Patents
Intelligent photovoltaic power station distribution cloud monitors system Download PDFInfo
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- CN108663088A CN108663088A CN201810478061.7A CN201810478061A CN108663088A CN 108663088 A CN108663088 A CN 108663088A CN 201810478061 A CN201810478061 A CN 201810478061A CN 108663088 A CN108663088 A CN 108663088A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- 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
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Abstract
The present invention relates to a kind of intelligent photovoltaic power station distribution clouds to monitor system, including data acquisition and monitoring modular, data transmission module, cloud platform module, data acquire and monitoring modular acquires the operation data in photovoltaic plant between two neighboring photovoltaic module and the operation data is packed into data packet and is sent to the cloud platform module by the data transmission module, cloud platform module receives the data packet and is parsed to the data packet, and the data after parsing are shown and stored；Wherein, the data transmission module includes wireless serial server.The data acquisition of the present invention and monitoring modular can monitor the operation information of two neighboring photovoltaic module in power station, and data packet stabilization is uploaded to high in the clouds using wireless serial server and is analyzed；Maintenance personnel can realize the intelligence functions such as on duty, big data analysis and fault pre-diagnosing, be effectively increased field device utilization rate, O＆M more accurately facilitates by cloud platform module monitors system.
Description
Technical field
The present invention relates to a kind of intelligent photovoltaic power station distribution clouds to monitor system.
Background technology
Due to the raising to power quality of increasingly depleted and today's society of traditional energy, solar photovoltaic technology
Using more and more extensive.But current solar photovoltaic power plant be mainly used in far from public electric wire net without electricity, power leakage area and one
A little Code in Hazardous Special Locations, and the website of areal photovoltaic plant is unevenly distributed, therefore how by these distributed energy systems
System carries out centralized dispatching management, achievees the purpose that effectively to use, and carrying out remote monitoring to photovoltaic plant just becomes more and more important.
Early stage, which is monitored photovoltaic power station system, to be typically found under proximity condition, i.e., closely monitors.Pass through liquid
Crystalline substance shows that the operating parameter and environmental parameter in various power stations, maintenance personnel keep the numerical value checked at the scene shown by supervision equipment,
And make corresponding processing.But as the natural environment of the expansion of photovoltaic plant scale and power station location compares evil
Bad, program maintenance personnel's labor intensity is big, and management level is not high, and needs to spend a large amount of human and material resources and financial resources, and
With the expansion of power plant scale, modernization expanding economy is not adapted to more and more.Later with IT technologies and communication skill
The fast development of art, the widely used remote control technology of photovoltaic plant.Existing middle-size and small-size photovoltaic power station monitoring system is generally sharp
LAN is formed with modes such as sensor combination bluetooth, Ethernet, radio communications to be monitored the operating parameter of photovoltaic plant.
But for monitoring the photovoltaic plant that quantity is more, range is wide, these technologies will there are problems that.Bluetooth, communication speed is low,
Its most transmission range reaches 100m, and there are certain safety issues, and for large-scale photovoltaic plant, obviously covering is not comprehensive；And with
Too net needs, by the wire medium including coaxial cable, twisted-pair feeder and optical fiber, to connect up large-scale photovoltaic plant, needs
Consume a large amount of man power and material, it is clear that increase the operating cost of photovoltaic plant.Gsm wireless communication is then tracking system control
Device processed is connect with monitoring computer, and monitoring computer passes through communication module, communication base station and mobile communication.Track power management person
Instruction short message is sent to the communication module of GSM modes by mobile phone, the monitoring software monitored in computer reads in short message, to short
Believe content analysis, then sends corresponding instruction to tracking system controller by 485 buses, tracking system controller receives finger
It enables, and executes instruction, and feedback is made to monitoring software, after monitoring software receives feedback, feedback information is passed through into communication module
It is sent to administrator's mobile phone.But its stability is poor, and power consumption is high, and networking capability is low, is not suitable for being used for transmitting accurate and important
Operating parameter.
Invention content
The operation information of two neighboring photovoltaic module in power station is monitored the purpose of the present invention is to provide a kind of, and is utilized
Data packet is stablized the intelligent photovoltaic power station distribution cloud for uploading to and analyzing in high in the clouds and monitors system by GPRS-DTU.
In order to achieve the above objectives, the present invention provides the following technical solutions：A kind of intelligent photovoltaic power station distribution cloud monitoring system
System, the intelligent photovoltaic power station distribution cloud monitoring system include data acquisition and monitoring modular, data transmission module, cloud platform
Operation data in module, data acquisition and monitoring modular acquisition photovoltaic plant between two neighboring photovoltaic module and by institute
It states operation data and is packed into data packet and the cloud platform module, the cloud platform mould are sent to by the data transmission module
Block receives the data packet and is parsed to the data packet, and the data after parsing are shown and stored；Wherein, institute
It includes wireless serial server to state data transmission module.
Further, the wireless serial server is GPRS-DTU.
Further, the data transmission module further include communication base station and with the communication base station, wireless serial service
The RS485 buses of device connection.
Further, data acquisition and monitoring modular include power circuit, light intensity and temperature measuring circuit, difference put and
Analog to digital conversion circuit, microprocessor, wherein：
Power circuit：Power supply is provided for the light intensity and temperature measuring circuit, A/D conversion circuits；
Light intensity and temperature measuring circuit：Irradiation and the temperature data of the sun are monitored, while being acquired when photovoltaic module is run
Voltage and current data are simultaneously transmitted to the difference and put and analog to digital conversion circuit；
Difference is put and analog to digital conversion circuit：The voltage and current data of the photovoltaic module are amplified and are monitored and transmitted
To the microprocessor；
Microprocessor：Receiving voltage and current data are simultaneously transmitted to the cloud platform module.
Further, the power circuit includes being depressured first order reduction voltage circuit, second level reduction voltage circuit and the third level
Circuit；The first order reduction voltage circuit is by voltage processing to export the first voltage value to the second level reduction voltage circuit and described the
Three-level reduction voltage circuit, the second level reduction voltage circuit export second voltage value to the microcontroller, the third level reduction voltage circuit
Output third voltage value is put to the difference and analog to digital conversion circuit.
Further, the first order reduction voltage circuit uses LM2596 chips, the second level reduction voltage circuit and described the
Three-level reduction voltage circuit uses SPX3819 chips.
Further, the first voltage value is 5.5V, and the second voltage value is 3.3V, and the third voltage value is
5V。
Further, the light intensity and temperature measuring circuit include for measuring the BH1750FVI chips of intensity of illumination, using
In the temperature sensor DS18B20 of measuring temperature.
Further, the difference is put and analog to digital conversion circuit includes the difference for being amplified small signal using AD620 chips
It puts amplifying circuit, carry out the analog to digital conversion circuit that the A/D of output signal is converted using MCP3421 chips.
Further, the microprocessor is ATmega128A microcontrollers.
The beneficial effects of the present invention are：The data acquisition of the present invention and monitoring modular can monitor two neighboring light in power station
The operation information of component is lied prostrate, and data packet stabilization is uploaded to high in the clouds using wireless serial server and is analyzed；Maintenance personnel
The intelligence functions such as on duty, big data analysis and fault pre-diagnosing can be realized by cloud platform module monitors system, be effectively increased existing
Field device utilization rate, O＆M more accurately facilitate.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, below with presently preferred embodiments of the present invention and after coordinating attached drawing to be described in detail such as.
Description of the drawings
Fig. 1 is that the intelligent photovoltaic power station distribution cloud of the present invention monitors the structural schematic diagram of system.
Fig. 2 is the principle schematic of the data acquisition and monitoring modular in Fig. 1.
Fig. 3 is the schematic diagram of the first order reduction voltage circuit in Fig. 2.
Fig. 4 is the schematic diagram of the second level and third level reduction voltage circuit in Fig. 2.
Fig. 5 is light exposure measurement circuit diagram.
Fig. 6 is temperature measuring circuit schematic diagram.
Fig. 7 is that difference puts circuit diagram.
Fig. 8 is A/D analog to digital conversion circuit schematic diagrams.
Fig. 9 is the monitoring of software flow chart that data acquire measuring terminals.
Figure 10 is measurement data stream topological diagram.
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.Implement below
Example is not limited to the scope of the present invention for illustrating the present invention.
Fig. 1 is referred to, the intelligent photovoltaic power station distribution cloud monitoring system in a preferred embodiment of the invention includes number
According to acquisition and monitoring modular 1, data transmission module 2, cloud platform module 3, the data acquisition and monitoring modular 1 acquire photovoltaic electric
The operation data is simultaneously packed into data packet and passes through the data by the operation data between two neighboring photovoltaic module of standing
Transmission module 2 is sent to the cloud platform module 3, the cloud platform module 3 receive the data packet and to the data packet into
Row parsing, and the data after parsing are shown and stored；Wherein, the data transmission module 2 includes wireless serial service
Device.In the present embodiment, the wireless serial server is GPRS-DTU.
Refer to Fig. 2, the data acquisition and monitoring modular 1 include power circuit 11, light intensity and temperature measuring circuit 12,
Difference put with analog to digital conversion circuit 13, microprocessor 14, wherein：
Power circuit 11：It is put and analog to digital conversion circuit 13, microprocessor 14 for the light intensity and temperature measuring circuit 12, difference
Power supply..In such a way that classification is depressured, i.e., the power circuit 11 includes by first order reduction voltage circuit, second level reduction voltage circuit
And third level reduction voltage circuit；Voltage processing is depressured by the first order reduction voltage circuit with exporting the first voltage value to the second level
Circuit and the third level reduction voltage circuit, the second level reduction voltage circuit export second voltage value to the microcontroller, and described the
Three-level reduction voltage circuit output third voltage value to the difference is put and analog to digital conversion circuit 13.In the present embodiment, the first order
Reduction voltage circuit uses LM2596 chips, the second level reduction voltage circuit and the third level reduction voltage circuit to use SPX3819 chips.
The first voltage value is 5.5V, and the second voltage value is 3.3V, and the third voltage value is 5V.Fig. 3 is referred to, Fig. 3 is
LM2596 chip voltage circuit diagrams.It is powered to chip LM2596 by photovoltaic module, is inputted from 1 pin, R1 and R2 are feedbacks
Resistance, for adjusting output voltage, D2 Schottky protects circuit, and circuit rear and front end capacitance is filter capacitor, and guarantee inputs, is defeated
Go out voltage stabilization.2 pins are output, and output voltage expression formula is：VOUT=VREF×(1+R2/R1)；In formula：VREFJoin for inside
Examine a reference source, VREF=1.23V.
Fig. 4 is referred to, SPX3819 chip 5V reduction voltage circuit schematic diagrams are as shown in the figure.5V type SPX3819 chips are as third
Grade reduction voltage circuit, using 5.5V voltages as input, and it is steady to realize to be down to 5V voltages supply chip AD620 and modulus conversion chip
Constant voltage inputs.1 foot of SPX3819 chips is power pins in figure, and the voltage that 5.5V is provided by LM2596 reduction voltage circuits supplies, 2
Foot is grounded, and 3 feet are Enable Pins, and 4 feet are low pressure difference linear voltage regulators, and for reducing line noise, the capacitance before output end is main
For filtering.Therefore, the intelligent photovoltaic power station distribution cloud monitoring system is powered by photovoltaic module, then is acquired and supervised through data
The classification decompression of power circuit 11 in module 1 is surveyed, microprocessor 14 and other chips can be supplied respectively to realize burning voltage
Input.
Light intensity and temperature measuring circuit 12：When monitoring irradiation and the temperature data of the sun, while acquiring photovoltaic module operation
Voltage and current data and be transmitted to the difference and put and analog to digital conversion circuit 13.The irradiation of the sun and the environment temperature of surrounding etc.
Factor affects the operation of photovoltaic plant, the irradiation of the wherein sun be cause photovoltaic cell generate volta effect directly affect because
Element；And temperature is important parameter the problems such as influencing solar energy conversion efficiency, photovoltaic battery panel working efficiency and service life,
Therefore it is essential for the irradiation of the sun and the monitoring of temperature.In the present embodiment, the light intensity and temperature measure electricity
Road 12 includes for measuring the BH1750FVI chips of intensity of illumination, for the temperature sensor DS18B20 of measuring temperature.
System measures the intensity of illumination using BH1750FVI chips, and Direct Digital output does not differentiate between environment light source, approaches
In the dichroism of visual sensitivity, the high-acruracy survey of 1 lux can be carried out to extensive brightness.Fig. 5 is referred to, in figure
VCC is power pins, and 3-5V power supplies, SCL is iic bus clock pins, and SDA is iic bus data pin, and A/DDR is
The device addresses BH1750FVI chip I IC pin.
Temperature, which measures, uses sensor DS18B20 measuring temperatures, and the temperature value detected in system is divided into the environment in power station
The temperature of temperature and solar panel.Fig. 6 is referred to, Vcc is power pins in figure, and 5V power supplies, GND is power ground, and DQ is 1-wire
Bus interface realizes the two-way communication of microprocessor 14 and DS18B20.Wherein DS18B20_1 measures the environment temperature around power station
Degree, DS18B20_2 measure the temperature of solar panel.
It, can by the measurement of the temperature to environment temperature and solar panel around Intensity of the sunlight, power station
Understanding in real time influences the factor of photovoltaic plant, it is ensured that works to photovoltaic plant normal table.
Difference is put and analog to digital conversion circuit 13：The voltage and current data of the photovoltaic module are amplified and are monitored and passed
Transport to the microprocessor 14；The difference is put puts amplifying circuit and A/D analog to digital conversion circuits with analog to digital conversion circuit 13 including difference.
In the present embodiment, the difference is put and analog to digital conversion circuit includes being put the difference that small signal is amplified using AD620 chips
The analog to digital conversion circuit that big circuit, the A/D that output signal is carried out using MCP3421 chips are converted.
Difference electric discharge road uses AD620 chips, and output voltage is sent to AD620 differences electric discharge road all the way by bleeder circuit, with 1:1
Follow amplification.Output current discharges road with 10 times by a 0.01 Ω resistance, the voltage at both ends by another way AD620 differences
Amplification gives A/D analog to digital conversion circuits and carries out analog-to-digital conversion.Refer to Fig. 7, the voltage of input and ground be separately connected AD_IN1 with
AD_IN2 is, it can be achieved that high-precision differential amplification.By adjusting inaG1 resistance, gain amplification is realized.
The A/D that A/D analog to digital conversion circuits carry out output signal using MCP3421 chips is converted.Amplifying circuit institute is put by difference
Obtained voltage signal carries out digital-to-analogue conversion by A/D conversion circuits, and two-way voltage is measured convenient for accurate.Fig. 8 is referred to, difference is put
The output voltage of amplifying circuit is by 1 foot of MCP3421 chips, it can be achieved that A/D is converted and exported to micro- by the ports SCL and SDA
Processor 14, measures small voltage.In the present embodiment, the communications protocol that the A/D analog to digital conversion circuits use is assisted for IIC
View.
It is put by difference and analog to digital conversion circuit, accurately measures voltage, the electric current of photovoltaic module, realized and photovoltaic module is transported
The measurement of row parameter, to ensure that photovoltaic plant output is stable, working properly.
Microprocessor 14：Receiving voltage and current data are simultaneously transmitted to the cloud platform module 3.In the present embodiment, institute
It is ATmega128A microcontrollers to state microprocessor 14.
Above-mentioned is the hardware design and data acquisition of data acquisition and monitoring modular 1, and data monitoring is as shown in Figure 9.
Photovoltaic power station needs to carry out the controls such as system initialization, data acquisition, analog-to-digital conversion, D/A outputs when monitoring terminal works
System operation.Microprocessor 14ATmega128A is to registers such as D/A chips, A/D translation registers, 0 interrupt registers of timer
Carry out initialization operation.On the one hand the two-way voltage of acquisition is micro- by being converted to after the A/D transfer functions in A/D conversion registers
The digital signal that processor 14ATmega128A can be handled directly.On the other hand, light intensity and temperature sensor carry out IIC with AVR
Communication, reads the light intensity and temperature of current environment.Last two-way voltage and temperature light intensity are transferred into D/A letters by appropriate
Number, exports corresponding voltage, then by data transmission module 2, by data transparent transmission to cloud platform module 3.
The data transmission module 2 further includes communication base station and the RS485 being connect with the communication base station, GPRS-DTU total
Line.After being acquired by the data and monitoring modular 1 acquires the operating parameter and environmental parameter of photovoltaic plant, then pass through
RS485 buses are by GPRS-DTU transparent transmissions to cloud platform module 3.GPRS-DTU can realize serial equipment and network server
Pass through GPRS network mutual data transmission.
The address and port of configuration cloud platform module 3 first, address are cloudata.usr.cn either some service
Then the device numbering of transparent transmission cloud and signal code are write into equipment by the address of device, port 15000 using TCP data agreement
In, after the parameter for having configured data transmission module 2, the data of acquisition are just transferred to Cloud Server according to corresponding agreement.It measures
Data flow topological diagram is as shown in Figure 10.A/D module Modbus RTU are connected with the RS485 serial ports of GPRS-DTU, RTU acquisitions
Then data are passed through after the packing of GPRS-DTU serial ports, by Socket A group organization datas with meeting complicated TCP/IP protocol suite
TCP/IP transportation levels reach the GPRS network layer of corresponding address.
The Default device that the cloud platform module 3 is added is mainly corresponding DTU, serial server, after the completion of addition, is
The automatic distribution ID of system, and by completing to access in software write device.Then select communications protocol Modbus, cloud server will
It is parsed according to the protocol format of setting, and database is stored according to the setting of data point, processing alarm, is pushed to front end.Addition
After complete equipment, turn RS485 adapters using USB, the A on adapter, B is coupled with to the A of GPRS-DTU, B interface will be another
End is inserted on the USB of computer, completes the setting for GPRS transmission module.
When LINKA lamps are bright, that is, illustrate that data transmission module 2 is connected to cloud platform module 3, energy normal communication, Xiang Yunping
3 transmission data of platform module.Below by interpolation data point, to read the data of Modbus slave registers, and in monitoring center
Display.Associate device refers to the equipment added in the first step, and Modbus slave addresses, mask register area are indicated from equipment id
When, it should be selected according to the register in Modbus RTU slaves where data, be to maintain register or input register, partially
Shifting amount is that read data actual address of register in Modbus slaves subtracts one.In addition, by the way that trigger is arranged, if measured
Range of the data not set by trigger, the information of exceptional data point will be sent to user by wechat or mail, make dimension
The personnel of repairing can timely and accurately repair photovoltaic apparatus.
After design by cloud platform module 3, the data of the parsing transmission of cloud platform module 3 show and carry out in monitoring center
Storage, user can be with historical query, and energy fault message notice is shown.
When monitoring system testing to intelligent photovoltaic power station distribution cloud, and the operating parameter of each photovoltaic module is carried out real
When acquire.Wherein, 0x01 nodes are photovoltaic module 1, and 0x02 addressed nodes are photovoltaic module 2.Test result such as Tables 1 and 2 institute
Show.
Table 1
Table 2
Measurement result shows that the voltage measurement and electric current, environment temperature, the sun that resolution ratio is 0.1V may be implemented in system
The measurement of energy battery plate temperature and light intensity.At the same node point of different moments, photovoltaic module at noon when operation irregularity, may
Since the shelters such as dust, fallen leaves are formed shade on solar module, make certain battery lists in solar module
Electric current, the voltage of piece are changed, and simultaneity factor monitors that event occurs for a certain photovoltaic module at synchronization difference node
Barrier.Intelligent photovoltaic power station distribution cloud monitoring system can realize data analysis for measurement, compare, to photovoltaic plant therefore
Barrier information is alarmed by wechat or mail.
In summary：The data acquisition of the present invention and monitoring modular 1 can monitor the fortune of two neighboring photovoltaic module in power station
Row information, and data packet stabilization is uploaded to high in the clouds using wireless serial server and is analyzed；Maintenance personnel can be flat by cloud
3 monitoring system of platform module realizes the intelligence functions such as on duty, big data analysis and fault pre-diagnosing, is effectively increased field device profit
With rate, O＆M more accurately facilitates.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of intelligent photovoltaic power station distribution cloud monitors system, which is characterized in that the intelligent photovoltaic power station distribution cloud prison
Examining system includes data acquisition and monitoring modular, data transmission module, cloud platform module, and the data acquisition and monitoring modular are adopted
Collect the operation data in photovoltaic plant between two neighboring photovoltaic module and the operation data is packed into data packet and passes through
The data transmission module is sent to the cloud platform module, and the cloud platform module receives the data packet and to the data
Packet is parsed, and the data after parsing are shown and stored；Wherein, the data transmission module includes wireless serial clothes
Business device.
2. intelligent photovoltaic power station distribution cloud as described in claim 1 monitors system, which is characterized in that the wireless serial clothes
Business device is GPRS-DTU.
3. intelligent photovoltaic power station distribution cloud as described in claim 1 monitors system, which is characterized in that the data transmission mould
Block further includes communication base station and the RS485 buses that are connect with the communication base station, wireless serial server.
4. intelligent photovoltaic power station distribution cloud as described in claim 1 monitors system, which is characterized in that the data acquisition and
Monitoring modular include power circuit, light intensity and temperature measuring circuit, difference put with analog to digital conversion circuit, microprocessor, wherein：
Power circuit：Power supply is provided for the light intensity and temperature measuring circuit, A/D conversion circuits；
Light intensity and temperature measuring circuit：Irradiation and the temperature data of the sun are monitored, while acquiring voltage when photovoltaic module operation
And it current data and is transmitted to the difference and puts and analog to digital conversion circuit；
Difference is put and analog to digital conversion circuit：The voltage and current data of the photovoltaic module are amplified and are monitored and are transmitted to institute
State microprocessor；
Microprocessor：Receiving voltage and current data are simultaneously transmitted to the cloud platform module.
5. intelligent photovoltaic power station distribution cloud as claimed in claim 4 monitors system, which is characterized in that the power circuit packet
It includes first order reduction voltage circuit, second level reduction voltage circuit and third level reduction voltage circuit；The first order reduction voltage circuit will be at voltage
Reason is to export the first voltage value to the second level reduction voltage circuit and the third level reduction voltage circuit, the second level reduction voltage circuit
Second voltage value is exported to the microcontroller, third level reduction voltage circuit output third voltage value to the difference is put to be turned with modulus
Change circuit.
6. intelligent photovoltaic power station distribution cloud as claimed in claim 5 monitors system, which is characterized in that the first order decompression
Circuit uses LM2596 chips, the second level reduction voltage circuit and the third level reduction voltage circuit to use SPX3819 chips.
7. intelligent photovoltaic power station distribution cloud as claimed in claim 5 monitors system, which is characterized in that the first voltage value
For 5.5V, the second voltage value is 3.3V, and the third voltage value is 5V.
8. intelligent photovoltaic power station distribution cloud as claimed in claim 4 monitors system, which is characterized in that the light intensity and temperature
Measuring circuit includes for measuring the BH1750FVI chips of intensity of illumination, for the temperature sensor DS18B20 of measuring temperature.
9. intelligent photovoltaic power station distribution cloud as claimed in claim 4 monitors system, which is characterized in that the difference is put and modulus
Conversion circuit include using AD620 chips by the difference that small signal is amplified put amplifying circuit, using MCP3421 chips carry out it is defeated
Go out the analog to digital conversion circuit of the A/D conversions of signal.
10. intelligent photovoltaic power station distribution cloud as claimed in claim 4 monitors system, which is characterized in that the microprocessor
For ATmega128A microcontrollers.
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| CN111176242A (en) * | 2020-01-20 | 2020-05-19 | 浙江中控技术股份有限公司 | Monitoring data transmission method and device of distributed control system |
| CN111487395A (en) * | 2020-04-28 | 2020-08-04 | 上海伍羿工业科技有限公司 | Online oil pollution monitoring system and method |
| CN112020126A (en) * | 2020-08-20 | 2020-12-01 | 广东源泉科技有限公司 | Data acquisition device and control method thereof |
| CN113517857A (en) * | 2021-04-29 | 2021-10-19 | 中国电建集团贵州工程有限公司 | Photovoltaic solar power station operation and maintenance monitoring system based on Internet of things control technology |
| US20230081392A1 (en) * | 2021-09-14 | 2023-03-16 | State Grid Jiangsu Electric Power Co., Ltd. Nanjing Power Supply Company | Intelligent power distribution device |
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