Research And Development On The Wind/Solar Hybrid Grid-Connected Generation System

The system of grid-connected wind/solar hybrid generation plays an important role in relieving the load of local power grid, shaving the peak of electric power system and saving traditional energy, therefore the research of grid-connected wind/solar hybrid generation is much valuable for economy and society. In this paper, for the system of undispatchable grid-connected wind/solar hybrid generation, a fit grid-connected running structure whose hardware and software have been designed, is developed on the basis of the research and analysis of the grid-connected system.Firstly complementary characteristics between wind energy and solar energy are discussed, and running structure of undispatchable grid-connected wind/solar hybrid generation, which contains wind turbine generator,photovoltaic array,inverter and electro-load, is analyzed detailedly, then the running principium and the working characteristics of each component contained in this system are specified; Secondly the whole grid-connected generation system is researched, analyzed and discussed detailedly while the developing process of the practical system is combined. In this section, the whole system is devided into inverting system,monitoring system and communicating system by their different functions. For each part, design elements are started with, then main control technics,achieving methods and hardware/software design are researched, and then a real instance is shown; At last, a practical project utilizing this grid-connected system is stated, and the issues of grid-connected wind/solar hybrid generation are listed up, and the evaluating methods of the practical running system are put forward.In this paper, the running structure of the undispatchable grid-connected wind/solar hybrid generation system which has been reseached and developed can guarantee the grid-connected system running efficiently and economically; Inverter technics which have been summed up and analyzed, can supply some useful suggestions for the people who are involved in the field of the grid-connected inverter; Besides, communication protocol which has been developed referring to SMA can ensure that each device of the system communicates with each other efficiently.