Transformerless Photovoltaic Grid-Connected Inverters

Photovoltaic power generation (PVPG) is an important part of renewable energy and is considered as the most potential renewable energy around the world. Major countries have invested huge amounts of money to compete in research and industrialization activities. Until 2018, global-installed solar PV capacity hadreached 505 GW. PVPG started developing a bit late in China, but it is developing significantly fast. According to the statistics, between 2010 and 2015 years, a miracle was created that worldwide cumulative installation capacity increased 100 times in 5 years. As a result, China has taken the first place in total PVPG accumulative installed capacity since 2015, as well as the ratio of China’s PVPG installed capacity to total capacity had reached 7% at the end of 2018. It produced 4% of the total power generation amount during 2018. At the same time, China Electric Power Research Institute reported that the average cost of PVPG plants had been reduced by 45% in 2017 compared with 2012.