In this webinar, we are going to talk about new ideas in terms of flexibility provision by local energy hubs and their impacts on the transmission network. The concept of grid-side flexibility can be extended by multi-energy systems functionality, incorporating the network constraints of different energy systems. In this way, the combination of multiple energy systems introduces a massive quantity of nonlinear constraints, yielding a non-convex problem. In addition, the coordination of different time scales and dynamic processes should be considered, resulting in a complicated model with both algebraic and differential equations.