Formulating requirements for a universally applicable power theory as control algorithm in power compensators

Different power theories are examined, with regard to their applicability in controlling dynamic filters for non‐active power. Frequency‐domain approaches and a range of time‐domain approaches are considered, the latter being inherently more suitable for real‐time control of dynamic filters. Finally, some detailed attention is devoted to a combination of the approaches by Fryze, Buchholz and Depenbrock. This FBD‐approach leads to a general time‐domain resolution of power components in a generalized m‐wire system that can be used effectively in deriving control algorithms for dynamic filters of non‐active power.