POWER SYSTEM PERFORMANCE ENHANCEMENT USING SUPERCONDUCTING MAGNETIC ENERGY STORAGE UNIT AND PROPORTIONAL INTEGRAL DERIVATIVE CONTROL

• Main Author: Handayani, Luky
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/69576
• Institution: Institut Teknologi Bandung

Frequency oscillations in power systems may occur due to sudden load change or system disturbance. Such oscillations may result in unsynchronized and undamped signals. In a multi machine system where all generators must operate in synchronism, undamped oscillations may lead to instability. To overcome this issue, this paper proposes a damping control scheme consisting of superconducting magnetic energy storage (SMES) and proportional integral differential (PID) controller to effectively damp frequency oscillations in multi-machine systems. Control parameters of the proposed SMES-PID system are tuned using particle swarm optimization (PSO) algorithm. Simulation results reveal the effectiveness of the proposed controller in damping the frequency oscillations and maintain system dynamic and transient stability during various disturbance events. It is shown by simulation results that PID controller and SMES design can find better quality solution in minimizing overshoot at frequency variations up to 78 % and accelerating the settling time up to 67 %. The selection of SMES coil size must be carefully considered due to its high cost. From the simulation results, the SMES coil size of 0.2 H and 2 H are of similar damping effect on power system oscillations.