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CN-224218360-U - Photovoltaic system detection module

CN224218360UCN 224218360 UCN224218360 UCN 224218360UCN-224218360-U

Abstract

The utility model relates to a photovoltaic system detection module, which specifically comprises an embedded computing unit, a temperature sensor, an illumination sensor, a current sensor, a voltage sensor and a wireless communication module, wherein the temperature sensor, the illumination sensor, the current sensor, the voltage sensor and the wireless communication module are connected with the embedded computing unit through signals, the temperature sensor comprises two paths of measurement terminals, the two paths of measurement terminals are respectively arranged on the surface of a photovoltaic module and the outer side of the photovoltaic module and respectively collect the surface and the ambient temperature signals of the photovoltaic module, and an ambient temperature signal output port of the temperature sensor is respectively connected to temperature signal inlet ends of temperature compensation loops in the illumination sensor and the current sensor. Compared with the prior art, the photovoltaic system detection module provided by the utility model can adapt to outdoor severe environments and ensure the detection precision of the sensor.

Inventors

  • XU XIAOYONG
  • CHEN GAOMING
  • XU ZEYUAN
  • WANG YILE
  • XIONG ZHENHUA
  • ZHANG XIWEI
  • XU HUAFENG

Assignees

  • 中交光伏科技有限公司

Dates

Publication Date
20260508
Application Date
20250428

Claims (10)

  1. 1. The photovoltaic system detection module is characterized by comprising an embedded computing unit (6), a temperature sensor (1), an illumination sensor (2), a current sensor (3), a voltage sensor (4) and a wireless communication module (5), wherein the temperature sensor (1), the illumination sensor (2), the current sensor (3), the voltage sensor (4) and the wireless communication module (5) are in signal connection with the embedded computing unit (6); The temperature sensor (1) comprises two paths of measurement terminals which are respectively arranged on the surface of the photovoltaic module and the outer side of the photovoltaic module and respectively collect the surface and the ambient temperature signals of the photovoltaic module, and an ambient temperature signal output port of the temperature sensor (1) is respectively connected to temperature signal inlet ends of temperature compensation loops in the illumination sensor (2) and the current sensor (3).
  2. 2. A photovoltaic system detection module according to claim 1, characterized in that the detection module is packaged in one piece, the sensor, the wireless communication module (5) and the embedded computing unit (6) being integrated in one sealed housing.
  3. 3. The photovoltaic system detection module according to claim 1, wherein an NTC thermistor or thermocouple is provided in the measurement terminal, and the measurement terminal is provided with a waterproof packaging case.
  4. 4. A photovoltaic system detection module according to claim 1, characterized in that the temperature sensor (1) is of the type MAX31875.
  5. 5. A photovoltaic system detection module according to claim 1, characterized in that the illumination sensor (2) comprises a silicon photodetector and a temperature compensation loop.
  6. 6. The photovoltaic system detection module according to claim 5, wherein the temperature compensation circuit comprises a first operational amplifier, the ambient temperature signal output port of the temperature sensor (1) is input to the positive input end of the first operational amplifier together with the output signal of the silicon photodetector after passing through a resistor, the negative input end of the first operational amplifier is grounded through a resistor, and the output end of the first operational amplifier is grounded through a resistor and fed back to the negative input end of the first operational amplifier through a pair of resistors and a potentiometer connected in series.
  7. 7. The photovoltaic system detection module of claim 5, wherein the silicon photodetector is an S1133-8BK silicon photodiode.
  8. 8. The photovoltaic system detection module according to claim 1, wherein the current sensor (3) is a hall effect current sensor, and is disposed outside the output cable of the inverter, and is configured to perform a non-contact measurement of the current.
  9. 9. The photovoltaic system detection module according to claim 8, wherein the hall effect current sensor is an MLX91208 integrated linear hall sensor, a temperature compensation module is integrated inside, and an ambient temperature signal output interface of the temperature sensor (1) is connected to a temperature signal input interface of the temperature compensation module.
  10. 10. The photovoltaic system detection module according to claim 1, wherein a voltage output port of the photovoltaic module is provided with a voltage division acquisition structure, two ends of a voltage division resistor are connected with a surge protection module, an output end of the surge protection module is connected to a voltage follower, an output end of the voltage follower is input into a low-pass filter circuit, and an acquired voltage signal is output to an embedded computing unit (6) after an output of the low-pass filter circuit passes through an analog-to-digital converter of an analog-to-digital converter; The voltage follower comprises a second operational amplifier, wherein the positive input end and the negative input end of the second operational amplifier are respectively connected with the negative end and the positive end of a voltage dividing resistor, the positive input end of the second operational amplifier is grounded through a resistor, the output end of the second operational amplifier is fed back to the negative input end through a resistor, the output end of the voltage follower and a reference voltage are respectively connected with the positive input end of a third operational amplifier after passing through a resistor, the positive input end and the negative input end of the third operational amplifier are respectively grounded through a resistor, and the output end of the third operational amplifier is fed back to the negative input end of the third operational amplifier through a group of resistors and capacitors which are connected in parallel.

Description

Photovoltaic system detection module Technical Field The utility model relates to the technical field of on-line monitoring of photovoltaic power generation systems, in particular to an integrated photovoltaic system standardized detection module. Background At present, the photovoltaic power generation system is widely applied to scenes such as expressway service areas, industrial and commercial roof power stations and the like. However, existing photovoltaic monitoring systems suffer from the following disadvantages: 1) The sensors and the monitoring equipment are distributed and distributed, interfaces are not uniform, namely, the sensors such as illumination, temperature, voltage and current in the existing photovoltaic system are usually installed separately, and the standards of the equipment interfaces are not uniform, so that the data acquisition and management are complex, the system integration level is low, and the maintenance cost is high. 2) The traditional photovoltaic monitoring equipment is dependent on timing manual inspection, cannot collect data in real time and conduct remote analysis and adjustment, so that fault discovery is delayed, and the system operation efficiency is affected. 3) The existing system generally uploads all data to a server directly, and the lack of a local data preprocessing function leads to a large burden on the server and high data transmission cost. Disclosure of utility model The utility model aims to overcome the defects of distributed arrangement of sensors and monitoring equipment, high detection error, limited data processing capacity and the like in the prior art and provide an integrated photovoltaic system standardized detection module. The aim of the utility model can be achieved by the following technical scheme: The photovoltaic system detection module comprises an embedded computing unit, a temperature sensor, an illumination sensor, a current sensor, a voltage sensor and a wireless communication module, wherein the temperature sensor, the illumination sensor, the current sensor and the voltage sensor are in signal connection with the embedded computing unit; The temperature sensor comprises two paths of measurement terminals, the two paths of measurement terminals are respectively arranged on the surface of the photovoltaic module and the outer side of the photovoltaic module and respectively collect the surface and the ambient temperature signals of the photovoltaic module, and the ambient temperature signal output ports of the temperature sensor are respectively connected to the temperature signal inlet ends of the temperature compensation loops in the illumination sensor and the current sensor. As a preferable technical scheme, the detection module adopts integrated encapsulation, and the sensor, the wireless communication module and the embedded computing unit are integrated in a sealed shell. As a preferable technical scheme, an NTC thermistor or thermocouple is arranged in the measurement terminal, and the measurement terminal is provided with a waterproof packaging shell. As a preferable technical scheme, the model of the temperature sensor is MAX31875. As a preferable technical scheme, the illumination sensor comprises a silicon photoelectric detector and a temperature compensation loop. The temperature compensation loop comprises a first operational amplifier, wherein an ambient temperature signal output port of the temperature sensor is input into a positive input end of the first operational amplifier together with an output signal of the silicon photoelectric detector after passing through a resistor, a negative input end of the first operational amplifier is grounded through a resistor, and an output end of the first operational amplifier is grounded through a resistor and is fed back to the negative input end of the first operational amplifier through a pair of resistors and a potentiometer which are connected in series. As a preferable technical scheme, the silicon photoelectric detector is an S1133-8BK silicon diode. As an optimal technical scheme, the current sensor adopts a Hall effect current sensor, is arranged on the outer side of an output cable of the inverter, and is used for carrying out non-contact measurement on current. As a preferable technical scheme, the Hall effect current sensor is an MLX91208 integrated linear Hall sensor, a temperature compensation module is integrated in the Hall effect current sensor, and an ambient temperature signal output interface of the temperature sensor is connected with a temperature signal input interface of the temperature compensation module. As a preferred technical scheme, a voltage output port of the photovoltaic module is provided with a voltage division acquisition structure, two ends of a voltage division resistor are connected with a surge protection module, an output end of the surge protection module is connected to a voltage follower, an output end of the voltage follower is