Allocation and contribution of reactive power for the practical utility system

Continuing trend towards deregulation and unbundling of transmission services has resulted in the need to access what the impact of a particular generator to load is on the power system. This paper presents the three different methods namely, Equivalent Reactive compensation(ERC), Modified Ybus and Power flow tracing to determine or measure the reactive power output from a particular generator to particular load. It also presents the electricity tracing method in detail with an algorithm of apportioning the transmission loss to individual loads or generator. This Method can be useful in providing additional insight into power system operation and can be used to modify existing tariffs of charging for transmission loss, reactive power and transmission services. Simulation and comparisons results are shown by taking IEEE30 bus system as Test system.