Mahdi Azimian - Kashan branch, Islamic Azad University, Kashan, Iran
Shapour Haddadipour - Isfahan Province electricity distribution company, Iran
Shahla Mohammad Hoseini Mirzaei - Isfahan Province electricity distribution company, Iran
Vahid Amir - Kashan branch, Islamic Azad University, Kashan, Iran

In this study, two main categories of energy source (Renewable and Fossil Energy sources) take into account for optimizing and improving the stability and reliability simultaneously with decreasing pollutant emission and total costs in a Microgrid system. The main innovation in this paper is using renewable gas sources and considering a new powerful reservation system. Imbalance between power generation and power demand is one of the main issues in a distribution network. Usually using batteries is the only way to save power for future uses. Here, using Power to Gas technology in a Microgrid as a supporting power reserve will cause higher power reservation and lower gas costs extracted from the main gas network. On the other hand, another renewable gas source is the Bio-Gas plant, which its produced gas will be injected into the main gas line. Using such a Bio-Gas plant will cause considerable reduction in pollutant emission. Power to Gas and Bio-Gas together will lead to energy cost reduction by producing Hydrogen and Methane respectively. Also Extracted Oxygen from Power to Gas is an independent product which can be sold separately. The thermal power plant in this Microgrid is a combined cycle turbo generator as combined heat and power (CHP) source which produces heat for domestic and industrial uses. This Microgrid by using renewable sources, including wind turbines, Solar Panels, Bio-Gas Plant and Power to Gas system is completely efficient, Reliable and more stable. Equations of each subcomponent of this Microgrid will be derived and optimizing procedure with their constraints will cause the best performance and functionality.