| Summary: | 碩士 === 國立成功大學 === 電機工程學系碩博士班 === 90 === This thesis presents the analyzed results of a combined PV/Wind generating system. A self-excited induction generator (SEIG) and a self-excited reluctance generator (SERG) are respectively utilized as a wind generator. To improve the variable frequency, variable voltage and loading effects of both generators under random wind speeds, a rectifier module and a battery system are employed to combine both PV and wind systems. The stored energy in the battery system is converted into constant voltage and constant frequency by means of an inverter module to supply isolated loads or connect to a utility grid.
A d-q axis equivalent-circuit machine model is employed to establish the SEIG, SERG, rectifier, inverter, PV and battery models in order to derive the complete dynamic equations of the studied system under three-phase balanced loading conditions. The derived system model is also employed to obtain system eigenvalues to determine both required minimum excitation capacitance and dynamic stability. Experimental results obtained from a laboratory 2.2 kW SEIG, a 0.37 kW SERG, a 1.5 kW PV system, a 24 V battery system and a 4.5 kW inverter module are compared with the simulated results to validate the feasibility of the proposed models.
|
|---|
