Design of an Advanced Static Synchronous Compensator to Improve Dynamic Excitation Performance of an Isolated Induction Generator System

The purpose of this project is to design an advanced static synchronous compensator (STATCOM) to improve dynamic excitation performance for an isolated induction generator (IG) system through the reactive power compensation under various loading conditions. With the developments of industry and commerce in Taiwan, the annual average load demand has recently experienced a rapid growth. The shortage of electricity generation and environmental damage caused by the fossil fuelled electricity generation act as a catalyst for the government to develop the necessary framework conditions for investment and development in renewable energy technologies. For the renewable energy conversion systems, induction generator is preferable due to its intrinsically rigid and simple structure. However, the voltage regulation for an IG is necessary since its rotor is short of field coils. In addition, for an IG connected with a power grid, the output frequency of the IG is always determined by grid frequency, but once the IG is disconnected from the power grid, causing islanding operation, the output frequency of the IG depends on generator parameters and loading conditions. To mitigate voltage fluctuation for an isolated induction generator under various loading conditions, the advanced STATCOM should be designed to be able to accommodate itself to the time-varying system frequency. In this project, theoretical derivation and computer dynamic models will be built first in order to simulate the effects of various loading disturbances on dynamic performance. Then, a scale-down advanced STATCOM and a primemover driven IG will be analyzed and be set up. Experiments will be conducted to verify the effectiveness and the performance of the advanced STATCOM when the isolated IG is subject to load variation disturbances. Finally, the experimental results will be analyzed and compared with the simulation results.

Project ID:PB9605-0159
External Project ID:NSC96-2218-E182-001