3. Unbalanced three-phase sinusoidal regimes
3.1 Description and origin of imbalances
The establishment of an equivalent single-phase diagram is based on the assumption that the three-phase network under study is balanced. This means, on the one hand, that all sources constitute an ideal three-phase system (same amplitude on each phase and phase shifts of 0˚, 120˚ and 240˚), and on the other that all electrical elements of the network are perfectly symmetrical (no phase can be distinguished from the other two).
In reality, things can be different. Imbalances may originate in the sources (mainly synchronous machines) or in the network itself.
For example, a real three-column transformer has a structure that is never quite balanced;...
The Ultimate Scientific and Technical Reference
This article is included in
Conversion of electrical energy
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Unbalanced three-phase sinusoidal regimes
References
In Techniques de l'Ingénieur, Electrical Engineering section
The Ultimate Scientific and Technical Reference
