Distribution system nodal pricing analysis with realistic ZIP load and variable wind power source

Electric distribution system has undergone a lot of changes in the recent past due to the rapid deregulation of the power market. Consequently, the analysis of distribution system pricing has acquired a great deal of interest. Nodal pricing is a financially effective pricing methodology generally used in transmission systems. Under the present scheme of states, it is admissible to utilize nodal pricing in distribution systems as well. This paper presents a study on nodal pricing in distribution systems and the impacts of wind energy penetration on the nodal prices of radial distribution network on an hourly basis. The impacts of realistic ZIP loads on the nodal prices have also been studied. A comparison is carried out between the nodal prices for a) without wind integration b)with wind integration and c)with wind integration and realistic ZIP load. The nodal prices are obtained using marginal loss coefficients (MLCs). The entire study is conducted on an IEEE 33 bus radial distribution system.