Full data monitoring from photovoltaic power generation to grid connection
The customer is a manufacturer mainly providing electrical equipment for the energy sector. In the solar photovoltaic business division, they provide complete photovoltaic integrated solutions. They have several test benches to analyze the photovoltaic system, from the DC output of the solar panel to the grid connection of the photovoltaic inverter. They want to do a lot of analysis on the test bench, such as photovoltaic module efficiency test, photovoltaic inverter efficiency determination, harmonic analysis, energy generation, power generation profile, high and low voltage ride through, etc., under different environmental conditions and different operating conditions. In addition to voltage and current data acquisition, they also want to connect video and infrared cameras, temperature, humidity and pressure sensors to the measuring equipment. In total, more than 130 sensors are connected to different measuring devices in all five test benches. The data acquisition of all signals of all test benches can be fully synchronized with the full sampling rate. They need to calculate the power of different lines, such as single-phase, three-phase, DC, and the power of different frequencies in the measurement process. In addition, they also need to carry out a lot of mathematical operations (filtering, statistics, correlation, classification, arithmetic function and trigonometric function) in the measurement process.
Challenges and requirements
• Synchronization of all measuring equipment of all test benches (5 test benches, more than 130 sensors)
• High sampling rate
• High bandwidth throughout the measurement chain
• Synchronous data acquisition of voltage, current, temperature, humidity, pressure and video
• Calculation of synchronous power of different frequencies and lines
Photovoltaic measurement hardware:
DEWE3-PA8 power analyzer or DEWE2-PA7
Static sampling module CPAD2
Photovoltaic measurement software:
OXYGEN The software can realize the collection of electrical signals, data recording of high and low voltage ride through tests, and power quality data monitoring on the whole PV link from modules to grid connection.
Overview of photovoltaic measurement system
