Steady State Modeling of Salient Pole Synchronous Machine — Lesson 2

This lesson covers the steady state modeling of alternators, focusing on synchronous machines. It delves into the equations that govern the operation of these machines, explaining how variables like stator voltage, generator torque, and field current interact in the steady state. The lesson also discusses the use of phasor diagrams to analyze the steady state of synchronous machines. For instance, it explains how to represent sinusoidally varying terms as phasors and how to construct phasor diagrams for different modes of operation, such as over-excited and under-excited synchronous motors and generators.

Video Highlights

00:12 - Introduction
03:34 - Understanding of the phasor diagrams and their significance in analyzing the synchronous machine in steady state
05:34 - Detailed discussion on the DQ axis and its role in the representation of sinusoidally varying terms
09:06 - Explanation of the concept of space phasors and time phasors
18:07 - Discussion on the operation of synchronous machines as a motor or a generator
32:03 - Explanation of the phasor diagrams for various modes of operation of synchronous machines

Key Takeaways

- The steady state modeling of alternators involves understanding the interaction of variables like stator voltage, generator torque, and field current.
- Phasor diagrams are a crucial tool in analyzing the steady state of synchronous machines. They allow for the representation of sinusoidally varying terms as phasors.
- The operation mode of a synchronous machine (over-excited or under-excited, motor or generator) can be represented in a phasor diagram, providing insights into the machine's operation.
- Changing the field excitation in a synchronous machine impacts its operation, which can be analyzed using phasor diagrams.