Brief Talk about Efficiency Improvement of PV Inverters
1.Importance of Inverter Efficiency Improving conversion efficiency is of great importance to PV inverters’ performance. If we assume a 500KW inverter generating for an average of 4 hours per day, when its efficiency rises by 1%, nearly 20 KWH more energy will be produced daily and 7,300 KWH more annually. Therefore, in order to maximize the benefit of customers, it's critical to increase inverter efficiency as much as possible. 2.Factors Affecting the Efficiency of PV Inverters The only measure to improve PV inverter efficiency is to reduce losses that mainly come from power switching tubes such as IGBT and MOSFET, as well as magnetic devices like transformers and inductors. Energy losses caused by IGBT mainly include conducting loss and switching loss, among which the first one is related to the internal resistance of its components and the current that passes through it, while the switching loss is more relevant to the switching frequency of power devices and the DC...