Development and testing of complex PLL algorithm using hardware in the loop system

Grid connected converters present a key element in modern systems for harvesting renewable energy sources. Each of these converters, non-dependent on the converter topology, requires a grid synchronization algorithm. This is not a new requirement for such converter types, but design and development of applicable algorithms requires a lot of time and resources. This is especially evident in high power converters on which grid codes are applied. This paper shows an accelerated development method applied on a complex PLL structure resulting with a code suitable for deployment on real-time control system.