Informatics Publishing Limited

G. Chitrakala ¹, G. Ganesan ², P. I. D. T. Baladuraikannan ³, T. Parameswaran ⁴

Affiliations
1 Department of EEE, E. G. S. Pillay Engineering College, Nagapattinam, IN
2 Department of EEE, Bharathiyar College of Engineering & Technology, Karaikal, IN
3 Dept. of EEE, Bharathiyar College of Engg & Tech, Karaikal, IN
4 Bharathiyar College of Engg & Tech, Karaikal, IN

Abstract

This paper proposes the control of reactive power is to be done with the help of FACTS (Flexible AC Transmission System) device such as SVC (Static Variable Compensator) & TCPAR (Thyristor Control Phase Angle Reactor). These are the compensators which give a suitable and fast response to control the reactive power for the load which is changing rapidly. Here the tap changer has been designed specially in order to improve the voltage level and there by the smoothening of the reactive power can be achieved. By controlling and varying the firing angle and duty cycle of the thyristor for R, RL and RLE load the varying of reactive power can be done. Simulation results are going to be achieved for the control of reactive power using tap changing system. The main advantage in this system is to control the reactive power and to improve the power quality in the grid to stabilize the voltage by various compensation methods. The validity of the proposed Thyristoroid Control of Tap Changer (TCTC) system is verified by the computer simulation results.

Keywords

FACTS, SVC, TCPAR, TCTC.

Full Text

     

K. Sangeetha ¹, T. Parameswaran ¹, V. Krishna Kumar ¹, K. Kalai Selvi ¹, T. Shanmuga Priya ¹

Affiliations
1 Anna University of Technology, Coimbatore, IN

Abstract

Cooperative proxy caching method have been proposed for reduce the burden produced by P2P traffic on Internet Service Providers (ISPs).In this paper, we propose two models for cooperative proxy caching of P2P traffic. The first model enables cooperation among caches in different autonomous systems (ASs), second model enables cooperation among caches within the same autonomous system. Then we propose simple object replacement polices for web caching in peer-to-peer network. Then we analyse different angles of cooperative caching schemes, our results are: 1) significant improvement in byte hit rate, 2) the simple object replacement polices are sufficient to attain maximum gain.3) the overhead produced by cooperative caching is negligible.4) the P2P traffic imposed on ISPs are reduced significantly. Our model confirms substantial gains from cooperative caching are attainable under wide range of traffic and network characteristics.

Keywords

Peer-to-Peer Systems, Web Caching, Cooperative Caching, Traffic Modelling, Object Replacement Policies.

Full Text