Recently, a growing interest on multienergy Microgrids has been observed. This kind of grids involves different energy vectors and treat them on a whole. The most typical cases contemplate electrical, natural gas and hydrogen subsystems. Multiple efforts have been conducted on modelling this kind of grids for energy management problems. However, it is observed that most of references studied do not faithfully modelling this kind of grids or directly omit some of the mentioned subsystems, which difficults the accurately representation of these grids. This paper aims at developing a comprehensive but tractable yet multienergy MG model, which allows to accurately represent the interaction between electrical, natural gas and hydrogen subsystems. To that end, the developed framework includes detailed models of the different elements which are typically encountered in this kind of grids such as Gas-to-Power or Power-to-Gas facilities. Also, charging stations for electrical, natural gas and hydrogen vehicles are considered. Different tariffs and vehicle charging modes can be easily incorporated within the developed framework. The proposed model is validated with a case study in typical winter and summer scenarios based on real data. Results show that the developed model is able to accurately represent the operational behavior of multienergy Microgrids, which may be valuable for multiple research and educational tools.