DESIGN AND ANALYSIS OF STATIC REACTIVE POWER COMPENSATORS

Abstract

The modern reactive power management concerns not only with the regulation of system voltage, but also with co-ordinated operation of the reactive power sources within the system. Further, with the inclusion of D.C. and EI-IV A.C. transmission for long distance, the importance of reactive power control has increased. The reactive power is not required by the system only but it is also required by various types of system load. Economical view warrants reactive power to be generated at a point where it is required. The management of reactive power is essential for maintaining good quality of supply. The selection of suitable devices for reactive power injection and its location is very critical from the reactive power management point of view. A Generalized concept for the design of Thyristor Controlled Reactor is given. The generalization brings out a better range of designs having improved performance. The most attractive features of these designs are that they produce less harmonics and appear cost effective due to saving in filtering equipment. System voltage profile and currents are mostly depend on line parameters and load connected at receiving ends. Using line parameters a concept is developed for the selection of the most sensitive bus where reactive power source should be installed. a A method for the reactive power management is also presented. This method is based on Newton's optimization method. The developed algorithm is tested for various systems and results are reported.