Application of modified power flow tracing method for reactive power pricing in practical utility system

Competitive trend towards restructuring and unbundling of transmission services has resulted in the need to discover the impact of a particular generator to load. this paper initially presents the analysis of three different reactive power valuation methods namely,modified ybus,virtual flow approach and modified power flow tracing to compute the reactive power output from a particular generator to particular load. among these methods,the modified power flow electricity tracing method is identified as the best method to trace the reactive power contribution from various reactive power sources to loads,transmission line,etc. also this proposed method breakdown the total reactive power loss in a transmission line into components to be allocated to individual loads. secondly,based on this method a novel allocation method for reactive power service for practical system is proposed. hence,this method can be useful in providing additional insight into power system operation and can be used to modify existing tariffs of charging for reactive power transmission loss and reactive power transmission services. simulation and comparison results are shown by taking wscc 9 and ieee 30 bus system as test system. © school of engineering,taylor’s university.