Regresar

Effect of line impedance on electric spring control

Abstract:

The study and development of technologies to facilitate efficient operation of microgrids has recently gained momentum. The Electric Spring is one of the new power electronics based device which can smoothen power and voltage fluctuations caused by load-generation mismatch in a microgrid. Microgrid is a subsystem of the existing power system with a decentralized control and distributed structure. Therefore, its line impedance varies over a wide range. While utilizing the ES as a reactive power compensation device for voltage regulation, the nature of line impedance (inductive or resistive) of the microgrid has not been taken into consideration in the existing control of the ES. This can result in a considerable deviation from the desired performance. This paper investigates the effects of line impedance on voltage regulation operation by the ES. It is proposed that the ES control needs to be altered according to the nature of the system line impedance. This hypothesis has been validated by simulating a small scale grid connected microgrid with resistive and inductive system line impedances.