:thumbsup:But if there are more than one unknown you have at least n! (I believe) possible correct solutions. You need more information on phase/current or more boundary conditions that could fix one or more values.

imho we need load or line current phase information

or at least some way to derive it

we have neither

fea is still an iterative approximation method

without enough info no boundary, no convergence

it's funny we are talking about this, the course I may take next term addresses this crap :lol:

**ECE/ME 2646: Linear System Theory (3 Credits, Fall 2015)**

**Description:**

Linear spaces and operators, mathematical descriptions of linear systems, controllability and observability, irreducible realization of rational transfer-function matrices, canonical forms, state feedback and state estimators, and stability.

**Prerequisite:**

Knowledge of linear algebra, differential equations, and feedback control systems (e.g. ECE 1673).