CN103166240A - Grid-connected solar photovoltaic power station monitoring system - Google Patents
Grid-connected solar photovoltaic power station monitoring system Download PDFInfo
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Abstract
The invention provides a grid-connected solar photovoltaic power station monitoring system which can monitor the temperature of a photovoltaic array group string, an output current voltage and direct current (DC) combiner box, a DC combiner box, a DC power distribution cabinet, an inverter, an alternating current (AC) power distribution cabinet, in-out current voltages of a boosting transformer, input current voltages of a grid-connected point, and the environment temperature, the light irradiance and the wind speed and direction of the solar photovoltaic array group string. Measured data of all the components are gathered comprehensively, essential information of a power station, test data of monitored components and environment meteorological data are displayed and stored in real time, information such as the running conditions of the monitored components and the performance ratio of the power station is calculated out, and an actual measurement operational data base of the power station is established. The components of the photovoltaic power station and the performance and the reliability of the system are estimated comprehensively, the optimization design of photovoltaic components and the system is promoted, and real and reliable data support is provided for the research and development and the improvement of photovoltaic power generating technology.
Description
Technical field
The present invention relates to the solar energy power generating field, the solar energy power generating monitoring system is specifically related to be incorporated into the power networks.
Background technology
In recent years, theCourse of PV Industry is rapid, and the photovoltaic generation project is because it has energy cleaning, environmental friendliness, the advantage such as renewable obtains the approval of society and the support energetically of country.In the photovoltaic plant Large scale construction, the development of the detection platform that to expose a serious problem be photovoltaic generating system is relatively backward, and the photovoltaic generating system of needing Erecting and improving badly detects.
As shown in Figure 1, grid-connected photovoltaic power station is comprised of photovoltaic array group string, header box, DC power distribution cabinet, inverter, AC power distribution cabinet/AC distribution panel, step-up transformer etc., by the photovoltaic array assembly, solar irradiation can be converted into direct current, boosting after inverter is converted into alternating current is connected to the grid.The power generation performance in parallel networking type photovoltaic power station is one of important technological parameters of photovoltaic plant, can only adopt at present monolithic photovoltaic module (solar irradiance 1000W/m under standard test condition
2, 25 ℃ of photovoltaic module internal cell temperature, air quality AM1.5) and the summation of peak power tests.But in actual application environment, the parameters such as solar irradiance, battery temperature, air quality are all constantly to change, therefore the generated output of photovoltaic plant constantly changes, and adopt the test data of photovoltaic module under standard test condition can not represent the actual efficiency of photovoltaic plant, can not carry out objective evaluation to the performance of photovoltaic plant.
Especially domestic, photovoltaic generation build and Power Plant Design aspect experience less, the monitoring equipment of most of photovoltaic plant is all just to begin every data are carried out record analysis from the input of inverter direct current, the test of shortage to the data of photovoltaic array group string, header box, DC power distribution cabinet, the complete detection in whole power station can't be realized, generating efficiency, equipment failure rate, operational reliability and maintenance cost that each assembly, parts and system in rear operation lifecycle are built up in the power station can't be assessed.Also have a problem to be, the checkout equipment in power station is all that inverter itself carries or be arranged at header box self at present, can only test this power station.Still do not have a kind of transportablely, be applicable to the monitoring device in multiple power station.
Summary of the invention
The purpose of this invention is to provide the solar photovoltaic power plant monitoring device that is incorporated into the power networks, can realize the service data of each assembly of grid-connected photovoltaic power station and the environmental data in power station are monitored.
Another object of the present invention is to provide a kind of solar photovoltaic power plant monitoring device that is incorporated into the power networks with autgmentability, and the user can select suitable test mode according to different power stations and different testing requirements.
A further object of the invention is to provide a kind ofly can dismantle mobile monitoring device.
In order to realize the foregoing invention purpose, the technical solution used in the present invention is that the solar photovoltaic power plant monitoring system that is incorporated into the power networks comprises data monitoring device, data acquisition unit and data analysis set-up.Wherein data monitoring device is divided into again outdoor-monitoring part, indoor monitoring part and meteorological test platform.Outdoor-monitoring partly is used for output current, the output voltage of output current, output voltage and direct current conflux case of temperature, the group string of monitoring photovoltaic array group string; Indoor monitoring partly be used for monitoring DC power distribution cabinet, inverter, AC power distribution cabinet/AC distribution panel, step-up transformer input current, input voltage, output current, output voltage and and the quality of power supply of site; The Climate measurement platform is used for the residing ambient temperature of monitoring photovoltaic array group string, light irradiance, wind speed and direction.
Described outdoor-monitoring partly has current sensor, voltage sensor and temperature sensor, at the output of photovoltaic array group string and the input of direct current conflux case, current sensor and voltage sensor are set, the back side mounting temperature sensor of being close to photovoltaic panel, be used for measuring the temperature of photovoltaic panel, respectively current data, voltage data and the temperature data of measuring be transferred to data acquisition unit with upper sensor.
Described data acquisition unit mainly is comprised of many interface boards, multi-interface card groove, data collecting card, PAC automation controller able to programme, insert in the multi-interface card groove according to the dissimilar data collecting card of testing requirement different choice, wherein the data such as electric current, voltage, temperature are transferred to data collecting card by many interface boards, and data collecting card sends the data that collect to PAC automation controller able to programme and carries out integrated processing.
Described indoor monitoring part is divided into again direct current monitoring part and exchanges the monitoring part, and wherein direct current monitoring part adopts current sensor and voltage sensor that the output of direct current conflux case, the input of DC power distribution cabinet and current data and the voltage data of output are monitored; Exchange the monitoring part adopt current transformer and the direct-connected mode of voltage to the input of the output of inverter, AC power distribution cabinet/AC distribution panel, step-up transformer and output and and current data and the voltage data of the input of site measure, above-mentioned measurement data is transferred to data collecting card by many interface boards, and data collecting card sends the data that collect to PAC automation controller able to programme and carries out integrated processing.
Further, the data acquisition unit of indoor monitoring part also comprises a plurality of intelligent electric meters, and the number of ammeter is consistent with the number of measured assembly.
Further, the output of many interface boards of described data acquisition unit divides two, a connection data capture card, and one connects intelligent electric meter.The data such as the electric current that intelligent electric meter transmits many interface boards, voltage, frequency intuitively show.
Further, the input described and site also is connected with the electric energy quality test instrument, is used for the input quality of power supply of monitoring analysis and site.
Described Climate measurement platform is arranged near photovoltaic array, formed by temperature sensor, total irradiation table, wind speed and direction tester, wherein temperature sensor is used for the residing ambient temperature of test light photovoltaic array, total irradiation table is used for test and the light irradiance of recovering on the array component same plane, the wind speed and direction tester is used for the wind speed and direction of the residing environment of test light photovoltaic array, and above-mentioned test data all is transferred to data collecting card and sends PAC automation controller able to programme to carries out integrated processing.
Further, the device of described measurement light irradiance can also be direct projection table or standard photovoltaic cell.
Described data analysis set-up comprises central processing module, the data of PAC automation controller able to programme after with integrated processing send to data analysis set-up, the measurement data of each assembly of data analysis set-up synthesis, the test data, the environment weather data that in real time show and preserve the essential information in power station, monitored assembly, calculate the information such as ruuning situation, power station Performance Ratio of monitored parts, set up power station actual measurement runtime database.
Further, in described data acquisition unit, wireless signal transmitter is installed, the data that PAC automation controller able to programme can be processed send to by the mode of wireless transmission the data analysis set-up that wireless signal receiver is installed.
Beneficial effect of the present invention is, by the monitoring to the environmental data in the monitoring of each assembly of photovoltaic plant and power station, set up power station actual measurement runtime database, the Performance And Reliability of each assembly of comprehensive assessment photovoltaic plant and system, promote the optimal design of photovoltaic module and system, for the research and development progress of photovoltaic power generation technology provides true and reliable Data support.
Description of drawings
Fig. 1 is the grid-connected photovoltaic power station schematic diagram.
Fig. 2 is the data collection point schematic diagram of grid-connected photovoltaic power station provided by the invention.
Fig. 3 is grid-connected photovoltaic power station monitoring system structure chart provided by the invention.
Fig. 4 is the power station essential information display interface of the data analysis set-up of grid-connected photovoltaic power station monitoring system provided by the invention.
Fig. 5 is the monitored module information display interface of the data analysis set-up of grid-connected photovoltaic power station monitoring system provided by the invention.
Embodiment
The below's set the drawings and specific embodiments are done further clear, complete description to technical scheme of the present invention, and the present invention meets novelty, creativeness and the practicality that Patent Law requires fully with explanation.What should be noted that embodiment describes is a part of execution mode of the present invention, can not be used for restriction protection scope of the present invention.
The solar photovoltaic power plant monitoring system that is incorporated into the power networks comprises data monitoring device, data acquisition unit and data analysis set-up.Wherein data monitoring device is divided into again outdoor-monitoring part, indoor monitoring part and meteorological test platform.Outdoor-monitoring partly is used for output current, the output voltage of output current, output voltage and direct current conflux case of temperature, the group string of monitoring photovoltaic array group string; Indoor monitoring partly be used for monitoring DC power distribution cabinet, inverter, AC power distribution cabinet/AC distribution panel, step-up transformer input current, input voltage, output current, output voltage and and the quality of power supply of site; The Climate measurement platform is used for the residing ambient temperature of monitoring photovoltaic array group string, light irradiance, wind speed and direction.
Described outdoor-monitoring partly has current sensor, voltage sensor, temperature sensor and data acquisition unit, at the output of photovoltaic array group string and the input of direct current conflux case, current sensor and voltage sensor are set, the back side mounting temperature sensor of being close to photovoltaic panel, be used for measuring the temperature of photovoltaic panel, respectively current data, voltage data and the temperature data of measuring be transferred to data acquisition unit with upper sensor.
Described data acquisition unit mainly is comprised of many interface boards, multi-interface card groove, data collecting card, PAC automation controller able to programme, insert in the multi-interface card groove according to the dissimilar data collecting card of testing requirement different choice, the interface quantity of multi-interface card groove can be according to required capture card number expansion, wherein the data such as electric current, voltage, temperature are transferred to data collecting card by many interface boards, and data collecting card sends the data that collect to PAC automation controller able to programme and carries out integrated processing.For example, the data collecting card of indoor section can adopt 4 or the 16 bit data capture cards such as NI9073, NI9205; Outdoor section can adopt 4,16 or the 32 bit data capture cards such as NI9017, NI9205.
Described indoor monitoring part is divided into again direct current monitoring part and exchanges the monitoring part, and wherein direct current monitoring part adopts current sensor and voltage sensor that the output of direct current conflux case, the input of DC power distribution cabinet and current data and the voltage data of output are monitored; Exchange the monitoring part adopt current transformer and the direct-connected mode of voltage to the input of the output of inverter, AC power distribution cabinet/AC distribution panel, step-up transformer and output and and current data and the voltage data of the input of site measure, above-mentioned measurement data is transferred to data collecting card by many interface boards, and data collecting card sends the data that collect to PAC automation controller able to programme and carries out integrated processing.
Further, the data acquisition unit of indoor monitoring part also comprises a plurality of intelligent electric meters, and the number of ammeter is consistent with the number of measured assembly.
Further, the output of many interface boards of described data acquisition unit divides two, a connection data capture card, and one connects intelligent electric meter.The data such as the electric current that intelligent electric meter will transmit by many interface boards, voltage, frequency intuitively show.
Further, the input described and site also is connected with the electric energy quality test instrument, is used for the input quality of power supply of monitoring analysis and site.
Described Climate measurement platform is arranged near photovoltaic array, formed by temperature sensor, total irradiation table, wind speed and direction tester, wherein temperature sensor is used for the residing ambient temperature of test light photovoltaic array, total irradiation table is used for test and the light irradiance of recovering on the array component same plane, the wind speed and direction tester is used for the wind speed and direction of the residing environment of test light photovoltaic array, and above-mentioned test data all is transferred to data collecting card and sends PAC automation controller able to programme to carries out integrated processing.
Further, the device of described measurement light irradiance can also be direct projection table or standard photovoltaic cell.
The data of PAC automation controller able to programme after with integrated processing send to data analysis set-up, the measurement data of each assembly of data analysis set-up synthesis is analyzed, the test data, the environment weather data that in real time show and preserve the essential information in power station, monitored assembly, calculate the information such as ruuning situation, power station Performance Ratio of monitored parts, set up power station actual measurement runtime database.
Further, in described data acquisition unit, wireless signal transmitter is installed, the data that PAC automation controller able to programme can be processed send to by the mode of wireless transmission the data analysis set-up that wireless signal receiver is installed.
Through repetition test, the transfer of data of the data acquisition unit of outdoor section preferably adopts the mode of wire transmission, the data loss problem that causes wireless transmission with the electromagnetic interference of avoiding the power station generating to produce, the transfer of data of other data acquisition unit adopt wired or wireless transmission method all can.
Claims (5)
1. the solar photovoltaic power plant monitoring system that is incorporated into the power networks comprises data monitoring device, data acquisition unit and data analysis set-up,
wherein said data monitoring device is divided into again the outdoor-monitoring part, indoor monitoring part and meteorological test platform, comprise current sensor, voltage sensor, temperature sensor, current transformer, temperature sensor, total irradiation table, the wind speed and direction tester, the temperature that is used for monitoring photovoltaic array group string, output current voltage and direct current conflux case, direct current conflux case, DC power distribution cabinet, inverter, AC power distribution cabinet/AC distribution panel, the input and output current/voltage of step-up transformer reaches also input current voltage and the residing ambient temperature of photovoltaic array group string of site, light irradiance, wind speed and direction,
Described data acquisition unit comprises many interface boards, multi-interface card groove, data collecting card, PAC automation controller able to programme, is used for gathering electric current, voltage, group string temperature, ambient temperature, light irradiance, wind speed and direction Monitoring Data;
Described data analysis set-up comprises central processing module, and the measurement data that is used for each assembly of synthesis is carried out computational analysis.
2. the solar photovoltaic power plant monitoring system that is incorporated into the power networks according to claim 1, it is characterized in that, the data acquisition unit of described indoor monitoring part also comprises a plurality of intelligent electric meters, the number of ammeter is consistent with the number of measured assembly, and the data such as the electric current that intelligent electric meter transmits many interface boards, voltage, frequency intuitively show.
3. the solar photovoltaic power plant monitoring system that is incorporated into the power networks according to claim 1, is characterized in that, the input described and site also is connected with the electric energy quality test instrument, is used for the input quality of power supply of monitoring analysis and site.
4. the solar photovoltaic power plant monitoring system that is incorporated into the power networks according to claim 1, is characterized in that, the device of described measurement light irradiance is total irradiation table or direct projection table or standard photovoltaic cell.
5. be incorporated into the power networks solar photovoltaic power plant monitoring system described according to any one of above claim, is characterized in that, in described data acquisition unit, wireless signal transmitter is installed, and wireless signal receiver is installed in data analysis set-up.
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