Power Research

Javeed Kittur ¹, H. V. Saikumar ², S. V. Sharath Raj ²

Affiliations
1 B.V. Bhoomaraddi College of Engineering and Technology, Hubli – 580 031, IN
2 The National Institute of Engineering, Mysore – 570 008, IN

Abstract

The power system stability improvement by a robust Power System Stabilizer (PSS) using accelerating power and speed as inputs is investigated independently in this paper. The objective of the work presented in this paper is to design an accelerating power input robust PSS and a speed input robust PSS to damp low frequency oscillations arising out of small and large disturbances. The robustness of the PSS is ensured by placing all the eigen values within a specified contour in the s-plane. A nonlinear constrained optimization technique has been applied for tuning the PSS parameters with the objective of damping oscillations over a wide range of operating conditions to make the PSS robust. The design of PSS is validated by performing nonlinear simulations for small and large disturbances.

Keywords

D-stability, parameter optimization, power system satbilier, robust controller, supplementary modulation controller

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Sachin Angadi ¹, B. Satyanarayana Kumari ², H. V. Saikumar ¹

Affiliations
1 The National Institute of Engineering, Mysore - 570008, Karnataka, IN
2 Indian Space Research Organization, Bangalore - 560 017, Karnataka, IN

Abstract

This paper describes the design of a control system for a micro step driving method of stepper motor using VHDL. The control system so designed is employed in the application of Solar Array Drive Assembly (SADA) in terrestrial solar plant and in satellites. This solution uses a digital controller with Sine-Cosine variation to control the currents of the two phases of the motor, making them change according to the orthogonal sinusoidal scalar form curve, fulfilling the micro step driving of stepper motor and improving its position control precision by hundreds of times. At the same time, this driving method solves problems such as large noise, resonance and non-even step angle and so on. The work presented in this paper implements the control system in Xilinx ISE.

Keywords

Micro-step, Sine-cosine variation, Satellites, Terrestrial solar plant, VHDL and Xilinx ISE

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