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A photovoltaic inverter is a device that converts direct current into alternating current. Because it is the reverse process of rectification, it is called inversion. Solar cells generate direct current under sunlight, but systems powered by direct current have significant limitations. The main function of an inverter is to convert the variable direct current voltage from the power source into an interference-free alternating sine wave output, which can be used by devices or fed back to the grid.
Requirements for Photovoltaic Inverters in Solar Power Generation
For engineers familiar with power management, what additional points should be noted when designing inverters for solar power generation systems? First of all, based on the current usage of existing photovoltaic system inverters, they generally only last for 5 to 10 years, while the lifespan of photovoltaic panels can reach 25 years. Inverters have become the least reliable component in photovoltaic systems, so designers must consider the lifespan of inverters. The solar inverter industry has high expectations for product lifespan, typically guaranteeing a lifespan of 20 to 25 years, and therefore pays special attention to the reliability of each component.
Key Factors in Improving the Lifespan of Photovoltaic Inverters
The lifespan of photovoltaic inverters is determined by the reliability of their components. Although semiconductor components usually achieve this level of reliability, it may be a challenge for passive components, especially electrolytic industrial capacitors. Improving the reliability of electrolytic capacitors is key to improving the reliability of photovoltaic inverters.
The Role of Electrolytic Industrial Capacitors in Photovoltaic Inverters
Photovoltaic inverters can be seen as special frequency converters powered by direct current sources, with an output frequency of 50Hz or synchronized with the grid's 50Hz. There is no rectification circuit-generated current pulse, so the function of industrial capacitors on the DC bus is to act as bus DC capacitor, absorbing the high-frequency harmonic current and three times the frequency current and high-frequency harmonic current generated by the inverter.
Anhui Safe Electronics has a team led by many senior engineers and doctors. The company owns multiple patents and software copyrights in the field of metallized film capacitors, film industrial capacitors, and related areas, including 47 authorized invention patents. The continuous research and innovation of the company's team ensure its leadership and advancement in the industry. Technological innovation is the cornerstone of the company's development. We adopt various paths of innovation, such as original innovation and integrated innovation, forming a strong R&D and innovation capability. We have established an Anhui Post-doctoral Research Workstation, Anhui Engineering Research Center, Tongling City Technology Center, and Tongling Engineering Technology Research Center, among other R&D platforms, with a relatively complete R&D system and strong R&D capabilities.
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