Ebadollah Amouzad Mahdiraji - Department of Engineering, Sari Branch, Islamic Azad University, Sari, Iran
Amir Yousefi Talouki - Department of Engineering, Sari Branch, Islamic Azad University, Sari, Iran

Reactive power and voltage control is one of the most important ancillary service that is a very important role innetwork stability and optimum utilization of market. If the independent power system operators, uncertainties in levelsof generation, transmission and distribution in order not to be considered reactive power market clearing, events maylead to drastic changes in the reactive power system voltage instability and even resulting network will be off. In thispaper, the objective function that are used in the process of reactive power market clearing optimization constraint thatthey have been reviewed and modified scenarios. Finally to settle right to enter the market despite the lack of definitivereactive activities, NSGA algorithm is presented that the purpose of this algorithm, creating of a compromise betweenthe technical and economic objectives and targets system. This structure introduced by more realistic and reactivepower distribution is done in such a way that in case of contingency, interest independent system operator will be betterprepared to overcome them, and they were sustain less expenses due Change contracts with market participants.

reactive power, uncertainty, NSGA algorithm, market clearing, system reliability