This paper proposes a generalized averaging 1 st harmonic state space model for Dual Active Bridge (DAB) converters fitting any triple phase-shift (TPS) modulation as well as classical modulation schemes. The model provides an analysis about steady state and AC behavior and about operating characteristics like RMS current and conducted emissions. Comparison of results with a full order SPICE simulation show a good agreement as well as with regard to the dynamic behavior prediction. With TPS modulation being the most effective means for optimizing the DAB's efficiency, the proposed approach avoids classical implementations' typical drawbacks such as the need for multiple models corresponding to the mapping of different operating space regions with respect to modulations or the need to pre-constrain control variables to specific switching modes. It can also help reduce the impact of large signal transients on the output filter or of the converter performance degradation with aging. The proposed model is suitable for designing a non-linear control scheme allowing better converter performances in relation to a classical one. The interest and accuracy of the proposed approach are shown through a 150W, 28V to 12V DAB design used for a flight computer power supply where the versatility in controller design and the converter efficiency optimization are required.