As the core equipment for energy conversion in photovoltaic power plants, inverters undertake the function of DC to AC grid connected power generation. The decrease in inverter conversion efficiency and distortion of power quality will directly cause a decline in the overall power generation of the power plant. Excessive harmonics and abnormal voltage will also affect the stability of the power grid and bring the risk of grid connection. Traditional inverter detection equipment mostly requires shutdown and power-off testing, interrupting power generation in the power station, resulting in economic losses, complex operating procedures, and potential safety hazards in high-voltage operations. Shanghai LAILX has launched the LX-PE93 inverter comprehensive tester, which supports non-stop online detection, multi-channel synchronous collection of AC and DC parameters, synchronized linkage of meteorological and environmental data, accurate calculation of actual conversion efficiency and power quality indicators of inverters, and provides an integrated testing solution for inverter performance evaluation, fault diagnosis, and grid connection acceptance. On site efficiency analyzer for photovoltaic power plants

The LX-PE93 inverter comprehensive tester is equipped with 4 DC acquisition channels and 3 AC acquisition channels, relying on high-precision current clamps to achieve non-contact current acquisition. On site testing does not require disconnecting the original power cables, only voltage testing leads need to be connected and current clamps need to be clamped. Testing can be carried out in the normal grid connected power generation state of the power station without power outage, without causing loss of power generation, and avoiding the risk of electric shock caused by high-voltage disconnection. The accuracy of equipment voltage measurement reaches ± 0.5% rdg ± 0.2V, and can synchronously collect parameters such as DC side and AC side voltage, current, active power, reactive power, power factor, and grid frequency. It completes the analysis of harmonics from 1 to 50, fully evaluates the grid connected power quality of the inverter, identifies harmonic distortion, voltage flicker, three-phase imbalance and other grid connected abnormalities, and the detection results meet the requirements of the photovoltaic power station grid connected acceptance specifications.

The device integrates high-precision irradiance sensors and temperature sensing units to synchronously collect solar irradiance, ambient temperature, and component backplane temperature. It relies on built-in professional algorithms to automatically calculate the PR performance ratio of the power station, and analyzes the inverter conversion efficiency data in conjunction with on-site meteorological conditions to accurately distinguish whether the decrease in power generation is caused by environmental factors such as lighting temperature, or by the degradation of inverter performance or component array failures, greatly reducing the probability of misjudgment of faults. The whole machine is equipped with a 6.5-inch high-definition color touch display screen and a Chinese operation interface. During the testing process, the inverter conversion efficiency curve, harmonic bar chart, and power change trend are displayed in real time. Engineers can complete preliminary fault diagnosis on site without waiting for later computer analysis data.

LX-PE93 combines two working modes: mobile inspection and long-term fixed-point monitoring. The equipment comes with a large capacity lithium battery and can work continuously for 3 to 4 hours without external power supply. It is suitable for on-site inspection of outdoor power stations without power supply such as roofs and mountains; The device supports Ethernet and 4G network communication, and can be fixedly deployed on the power plant site to achieve 24-hour continuous monitoring. Management personnel can remotely issue testing instructions and retrieve monitoring data to achieve centralized control of remote power plants. The whole machine has complete overvoltage, overcurrent, and overheating protection functions, and a high-voltage isolation power supply design to ensure the safety of testing personnel and equipment. After the test is completed, the data is automatically stored and paired with PC analysis software. Batch test reports can be exported to compare the performance changes of inverters in different time periods and track the long-term attenuation trend of the equipment.

The product is widely used in scenarios such as grid connection acceptance of photovoltaic power plants, annual performance testing of inverters, troubleshooting of abnormal power generation, third-party performance evaluation, and factory inspection of inverters. Against the backdrop of the continuous expansion of photovoltaic power plant inventory, the problem of power generation losses caused by inverter aging and device performance degradation has been increasing year by year, and the demand for non-stop online detection continues to grow. The Shanghai LAILX LX-PE93 inverter comprehensive tester breaks the traditional shutdown detection mode, using multi-channel synchronous measurement, comprehensive analysis of power quality, PR value linkage calculation, remote network monitoring and other capabilities to help power station operation and maintenance personnel accurately evaluate the true operating efficiency of inverters, timely locate power quality hazards, and optimize power station generation revenue. LAILX continues to deepen its expertise in the field of photovoltaic electrical testing, continuously improving system level testing equipment for power plants, and assisting in the efficient, safe, and stable grid connected operation of photovoltaic power plants.

Photovoltaic power plant on-site efficiency analyzer, inverter comprehensive analyzer, inverter detection instrument