Versatile PID-HVDC controlls for emhancement of power systems stability

Abstract

In this paper, the investigation is carried out on the improvement of power system stability by utilizing auxiliary controls for controlling power flow in HVDC link. Transient stability analysis is done on a multi-machine system, where, conventional controllers P, PI, PD and PID etc. are developed to improve the stability of the power system. Simulated results show for a multi machine system it is necessary to employ control signals derived from relative angle deviation, speed deviation and acceleration and different combinations of these signals. The performance of the system at different locations of HVDC link and fault locations is studied to optimize the location of HVDC link.