Method for Measuring Power Flow in a Distribution Network?
So, I've found a method that seems like it will work - it's called Power Flow Tracing. Basically, it's an application of KCL that works on the idea that the proportion of power flowing into a node from a particular generator is equal to the proportion of power leaving the node on all other circuits/branches.

I've found two papers that help explain it:


Broad overview: Power flow tracing in NZ
Technical paper: Tracing the flow of electricity or here


I'd still be interested to hear of any more practical use cases of this method either in the context of a simulation type study or something more real world, or any software that already implements power flow tracing as part of its load flow.