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It is well known that, electrical power distribution network (PDN) is a very complex dynamic system. In order to analyze instantaneous behavior of PDN, an efficient Electromagnetic Transient (EMT) simulation framework is required. In this paper a PDN model of substation of Guwahati city, India is presented for EMT analysis. The EMT problem formulation is based on trapezoidal integration for lumped...
Simulation is an extremely valuable tool for designing, operating and understanding complex systems in Power systems and Power Electronics. Broadly simulation can be of two types, Off-line and Real-time Simulation. Off-line simulation uses a digital computer and real time simulation uses a dedicated high speed digital processing hardware. Real time simulation allows analysis of a physical system in...
Load frequency control (LFC) is major issue in the field of power system engineering. The primary reason behind to do a study on LFC is to maintain the balance between generated power and demand of consumer without compromising any deviation in the nominal frequency and schedule tie-line power. This paper deals with application of classical controller like linear quadratic regulator (LQR) and differential...
Direct Torque Control (DTC) is a method to control the torque in variable frequency drives. This paper describes sensorless DTC of brushless dc (BLDC) motor drive operating in constant torque region under two phase conduction mode to get instantaneous torque control. Sliding Mode Observer (SMO) which is low sensitive to parameter variation is proposed to estimate the phase-to-phase trapezoidal back-EMF...
Managing the electrical reserves in a small, geographically elongated nation like New Zealand is a challenge. The Reserve Management Tool (RMT) developed over a decade ago optimally schedules the reserve load given the current and anticipated circumstances every half hour to ensure that the reserve requirement for electricity is always met. However with changes in the underlying computing platform,...
Power system oscillation mode identification and its characterization are very important in monitoring and control. In this paper, the phase and frequency information extraction procedure from Wide Area Measurements using two methods, viz Hilbert transform and S-transform methods are compared. Identification of inter area modes and their characterization is done. Synthetic as well as real time signals...
Previous efforts aimed at modeling solar cell bowing due to the aluminum back surface field (BSF) have focused on relatively simple two or three layer models. This paper will outline the effort to develop a more sophisticated finite element (FE) model approach. This approach is superior to previous modeling efforts since it allows a more accurate representation of the cell structure and can handle...
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