The inverter is the core hub of energy conversion in photovoltaic power plants. The DC power output by the components is converted into AC power and integrated into the grid through the inverter. The performance indicators such as inverter conversion efficiency, harmonics, and power factor directly determine the overall power generation revenue of the power plant. During long-term operation, factors such as component aging, high environmental temperatures, and power grid disturbances can cause inverter performance degradation, resulting in decreased conversion efficiency, harmonic exceedance, and power factor non-compliance. Most traditional detection methods require shutdown and power-off testing, which can directly cause power generation losses. At the same time, the wiring operation is cumbersome, making it difficult to fully evaluate the overall performance of the inverter in an online state. The LX-PE93 inverter comprehensive tester developed by LAILX in Suzhou adopts non-contact current clamp sampling to achieve online detection of power station grid connected operation without stopping, providing professional solutions for inverter performance evaluation and power station system efficiency diagnosis in Suzhou. On site efficiency analyzer for photovoltaic power plants

The LX-PE93 has an ultra wide testing range, with a DC voltage of 0-1500V, an AC line voltage of 0-1000V, and a current measurement of 0.5A-1500A, perfectly adapting to the current mainstream 1500V string and centralized photovoltaic inverter systems. The equipment is equipped with 4 DC channels and 3 AC channels. The electrical parameters of the DC and AC sides can be synchronously collected, and the accuracy of voltage measurement reaches ± 0.5% rdg ± 0.2V. It can accurately collect parameters such as voltage, current, active and reactive power, power factor, and grid frequency, complete 1-50 harmonic analysis, fully evaluate the grid connected power quality of the inverter, identify grid connected abnormal problems such as harmonic distortion and voltage flicker, and meet the requirements of relevant testing specifications for grid connected acceptance. The equipment is equipped with high-precision irradiance sensors and temperature sensors, which can synchronously collect solar radiation, environmental temperature, and component backplane temperature. Combined with power generation data, it automatically calculates the PR performance ratio of the power station, analyzes the inverter conversion efficiency and environmental conditions in linkage, distinguishes whether it is the performance degradation of the inverter itself or the data fluctuation caused by changes in lighting temperature, and accurately locates the source of system efficiency loss.

The biggest highlight of the equipment lies in the online non-stop detection mode, which relies on high-precision current clamps to achieve non-contact current collection without disconnecting the original cables. The voltage test leads can be connected on site, and the current clamp can clamp the cables to carry out testing. The power station maintains normal grid connected power generation without generating power loss, greatly improving on-site detection efficiency and avoiding safety risks caused by power outage wiring. The whole machine is equipped with a 6.5-inch high-definition display screen, which displays various parameters in real-time and intuitively. On site, the inverter conversion efficiency curve, harmonic bar chart, and power change trend can be viewed, and engineers can preliminarily complete fault diagnosis on site without relying solely on computer analysis in the later stage. The device supports both short-term on-site single point testing and long-term continuous online monitoring. It can be temporarily deployed at the inverter site to continuously track operational data for several days, capture intermittent and sporadic performance abnormalities, and is suitable for troubleshooting and reproducing difficult hidden faults.

Intelligent data processing and networking capabilities are another core advantage of the LX-PE93. The device has a large local storage capacity, which can store monitoring raw data for more than a year and support USB one click export of data files. The device supports multiple communication methods such as Ethernet and 4G, enabling remote access. Staff can remotely view real-time monitoring data, issue testing instructions, and reduce the labor cost of repeatedly rushing to the site. Multiple instruments can be networked to achieve centralized monitoring and management of multiple inverters in large photovoltaic power plant clusters. Equipped with upper computer analysis software, it can complete efficiency curve drawing, harmonic report, PR value statistics, automatically generate detection reports, and meet the needs of EPC completion acceptance, third-party testing and identification, power station operation and maintenance evaluation, and other work. The equipment has a wide range of application scenarios, and the grid connection acceptance of new power stations can verify whether the actual performance of the inverter meets the nameplate indicators; The operation and maintenance of existing power stations are used to investigate the problem of low power generation; The evaluation of the aging and attenuation degree of inverters in the renovation of old power stations can also be used for on-site comparison testing of inverter manufacturers' type tests.

The revenue management of photovoltaic power plants relies on a precise understanding of the actual operational performance of inverters. The LX-PE93 inverter comprehensive tester breaks the limitations of traditional testing that requires shutdown, integrating electrical parameter measurement, power quality analysis, meteorological synchronous collection, and remote monitoring to create a one-stop inverter comprehensive testing platform. Suzhou LAILX is deeply involved in the field of photovoltaic testing equipment, fully integrating hardware and algorithm optimization with domestic power plant site conditions, providing stable and reliable domestic testing equipment, supporting technical training, regular calibration and other complete services, helping the photovoltaic industry to do a good job in inverter performance control, ensuring the quality of power plant grid connection, and maximizing the release of photovoltaic project power generation revenue.

Photovoltaic power plant on-site efficiency analyzer, inverter comprehensive analyzer, inverter performance testing