With the rapid development of solar photovoltaic power generation, 1500V photovoltaic inverter has gradually become the mainstream. Compared with the traditional 1000V photovoltaic inverter, 1500V photovoltaic inverter has a higher voltage level, which can reduce current, reduce system loss, and improve system efficiency. However, due to the increase of voltage, the power devices of inverters face greater challenges. In this paper, we will discuss how to deal with the power devices in the 1500V photovoltaic inverter.
First, in the face of higher voltage level ADS7841E Power devices need to have higher withstand voltage capability. IGBT (Insulated Gate Bipolar Transistor) is the power device commonly used in 1500V photovoltaic inverter. In order to meet the higher voltage demand, the withstand voltage capability of IGBT needs to be improved. At present, high voltage IGBT products suitable for 1500V inverters have been launched in the market. These products adopt advanced packaging technology and materials, which can withstand higher voltage and provide more stable and reliable performance.
Secondly, power devices in the 1500V photovoltaic inverter also need to have lower switching loss and conduction loss. As the voltage increases, the switching speed of power devices needs to be faster to improve the response speed and dynamic performance of the system. In addition, the conduction loss of power devices also needs to be reduced to improve the efficiency of the system. In order to meet these challenges, power device manufacturers have adopted advanced materials and processes to optimize device structure and parameter design. For example, the design of low resistance materials and reduced current density is adopted to reduce the conduction loss; Low inductance packaging and optimized circuit layout are adopted to reduce switching loss.
In addition, due to the high power density of the 1500V photovoltaic inverter, the power devices also need to have better heat dissipation capacity. High power density will lead to increased temperature rise of devices, which will affect the reliability and life of devices. Therefore, the design of the cooling system needs to be considered in the inverter design to improve the cooling effect of devices. Common heat dissipation methods include using high thermal conductivity materials and structures, increasing heat dissipation surface area, optimizing heat dissipation channels, etc.
Finally, the power devices in the 1500V photovoltaic inverter need to have higher reliability and life. As the inverter is generally installed in the outdoor environment and faces various adverse weather conditions, the power device needs to be resistant to high temperature, humidity, corrosion and other characteristics. In addition, since inverters generally have a long service life, power devices also need to have a long life and stable and reliable performance. In order to meet these requirements, power device manufacturers usually use high-quality materials and processes for strict reliability testing and life assessment.
In conclusion, with the 1500V photovoltaic inverter becoming the mainstream, power devices need to cope with challenges such as higher voltage level, lower loss, better heat dissipation, and higher reliability and life. By adopting advanced materials, processes and design methods, power device manufacturers can meet these requirements, provide high-performance and reliable power devices, and promote the development of 1500V photovoltaic inverter.
