Control technologies in distributed generation system based on renewable energy

Greats efforts have been done to distributed renewable energy (RE) power system in latest years. This paper summarizes the research achievements of New Energy Research Center (a research center in Electric Power College, South China University of Technology) in distributed RE power system. The paper is mainly divided into three parts, including wind energy generation, photovoltaic generation and energy management system. Firstly, the wind energy generation control technologies is presented in variable speed constant frequency, maximum wind power capture, power decoupled control, pitch control, low voltage ride through, and grid synchronization. Secondly, the photovoltaic generation control technologies is introduced including photovoltaic maximum power point tracing, configuration and optimization of photovoltaic array and grid-connected converter. Lastly, the energy management system is proposed as the super manage layer to hybrid REs, which including wind speed forecast, integrative evaluate to power quality, power quality analytical instrument and the construction of energy management system based on multi-agent technology.