Informatics Publishing Limited

P. K. Chandrashekhar ¹, S. G. Srivani ², S. Shyam Sundar ³, Rashmi ⁴

Affiliations
1 Senior Research Fellow, Power Systems Division, Central Power Research Institute, Bangalore – 560 080, Karnataka, IN
2 Associate Professor, Dept. of Electrical & Electronics Engg., R V College of Engineering, Bangalore – 560 059, Karnataka, IN
3 Engg. Officer. Gr.-4, Power Systems Division, Central Power Research Institute, Bangalore – 560 080, Karnataka, IN
4 Associate Professor, Dept. of Electrical & Electronics Engg.,Siddaganga Institute of Technology, Tumkur - 572 103, Karnataka, IN

Abstract

The power system is dynamic in nature and is constantly being subjected to disturbances. It enters into dynamic instability when there is an imbalance between generation and varying load demand which calls for use of Power System Stabilizer (PSS). PSS is a device which provides additional signal to the voltage regulator derived from speed deviation, excitation deviation and accelerating power for damping critical oscillations. The PSS used should be capable to produce appropriate stabilizing signals against a wide range of operating conditions and disturbances. For this purpose, a PSS based on fuzzy logic control under multi-operating conditions is proposed in this paper. The performance of Fuzzy Logic based PSS(FLPSS) applied to Single Machine Infinite Bus (SMIB) system is studied for three different operating conditions; nominal load, heavy load and fault condition in transmission line. For Fuzzy PSS, speed deviation and acceleration are taken as input. The system is simulated in SIMULINK platform and its dynamic response is analyzed for system without PSS and with PSS. The results are compared for system with Conventional PSS and Fuzzy Logic PSS.

Keywords

Automatic Voltage Regulator (AVR), Fuzzy Logic Controller (FLC), Power System Stabilizer (PSS), Single Machine Infinite Bus (SMIB)

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S. Shyam Sundar ¹, Shailesh Kapoor ¹

Affiliations
1 Central Power Research Institute, Bangalore - 560080, Karnataka, IN

Abstract

This paper presents the analysis of losses for conversion from low voltage distribution system to high voltage distribution system based on simulation of typical power distribution network in agriculture feeder. Conversion from LVDS to HVDS involves removal of existing distribution transformer (100kVA/63kVA) and installation of distribution transformer (25kVA) near to the consumer load and conversion of the existing low voltage (0.433 kV) line into high voltage (11kV) line.

Keywords

High Voltage Distribution System (HVDS), Irrigation Pump (IP), Low Voltage Distribution System (LVDS).

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