This is the Soulwolf Class Advanced Heavy Cruiser.
The design isn't my own, this model is based on skecthes by Chris Reyes (AKA 'Atolm'), who was playing with ideas for a future Enterprise F.
I fleshed his scetches out a bit and created this low-poly 3D model based on his design back in 2002.
Folks who play Star Trek Online might notice a few coincidental similarities between this ship and Adam Ilhe's Odyssey Class design selected to represent the Enterprise F in the game, especially where the interconnecting dorsal between the primary and secondary hulls is concerned. But the Soulwolf class predates the Odyssey class by almost 10 years.