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This paper presents a method for the tuning of a power system stabilizer (PSS) for damping inter-area low-frequency oscillations based on wide area phasor measurements and robust controller design with the linear matrix inequality (LMI) approach. The dynamics of a power system is identified as an approximate model based on voltage phasors obtained by the wide area measurement system (WAMS). Then,...
Some previous research based on Fast Fourier Transform (FFT) estimated the damping ratio and frequency oscillation from Eigen value of the matrix associated to a Single Machine Infinite Bus (SMIB) model. Damping constant can be calculated for every 20 minutes cycles. However, it failed to explain how to calculate the damping ratio without associating the system to a SMIB Model. Furthermore, there...
This paper presents a method for tuning power system stabilizer (PSS) parameters to control low-frequency oscillations. The dynamics of low-frequency oscillations can be identified by wide area phasor measurements. Hence, the theory builds a low-order model that reflects the dynamics of the full system, based on observation components that are included in system oscillations. Since the model reflects...
During past years, power systems are continuously expanding with increasing electric power supplies and distribution systems. Accordingly, such systems might be subjected to power system instability depending on their system conditions. Therefore, we have installed Phasor Measurement Unit (PMU) in Japanese universities and constructed analytical system for the power system characteristics. This paper...
Industrial electric power systems such as factories (steel, petro chemistry and paper pulp) which have customer's power generating plants have very complicated system structures. Most of loads in industrial electric power systems consist of induction motors and synchronous motors. In addition, these systems are usually interconnected with utilities. Therefore, voltage instability phenomena caused...
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