Renewable energy sources deliver environmentally friendly sustainable power. This power is initially not always generated as AC current at 50 or 60Hz, as is delivered by the grid and required by most electric consumers. DC current, as generated for example by photovoltaic panels, must be transformed by a process called power conversion before it can be fed into the grid, using PV inverters.

The currently used high-speed semiconductor switch-mode techniques, to achieve highest efficiency levels, unfortunately create a broad spectrum of interference, ranging from low frequency harmonics to conducted and radiated electromagnetic interference (EMI) emissions in the Megahertz range.

Such interferences must be eliminated for three reasons: Firstly, PV systems must meet Power Quality standards and adhere to local utility codes. Secondly, electric and electronic equipment in the vicinity or connected to the same branch of the grid must not be affected in their function and reliability. Thirdly, contractors need to be able to guarantee the quality and durability of the PV systems.

Schaffner has more than 45 years experience in tackling interference and compliance problems associated with many different power electronic devices used in renewable energy systems, particularly with PV inverters. And we are proud to support industry leaders in Europe, North America, and Asia/Pacific in developing highly reliable and compliant renewable energy systems.