Damping of Electro-Mechanical Oscillations in a Multimachine System by Direct Load Control

Summary, in English

Utility controlled customer loads as actuators

present new possibilities for power system control. The use of

active loads controlled by local bus frequency is proposed for

damping of electro-mechanical oscillations. The viability of

the idea is studied for one load in a three machine system

with a meshed network. Active power mode controllability

and phase angle mode observability are determined from the

eigenvectors of a differential algebraic description of the

uncontrolled system. The geographical variations in the entire

network of controllability and observability are shown to be

identical. It is presented graphically on a 3D-view of the

network topology and is used as a generalization of the term

mass scaled electrical distance. System zeroes limit the

maximum damping. An electro-mechanical mode pendulum

analog is introduced that explains this. Time simulations

verify the final controller design

• Author: Olof Samuelsson; B. Eliasson
• Department/s: Industrial Electrical Engineering and Automation
• Publishing year: 1997
• Language: English
• Pages: 1604-1609
• Publication/Series: IEEE Transactions on Power Systems
• Volume: 12
• Issue: 4
• Links: http://dx.doi.org/10.1109/59.627865
• Document type: Journal article
• Publisher: IEEE - Institute of Electrical and Electronics Engineers Inc.
• Topic: Other Electrical Engineering, Electronic Engineering, Information Engineering
• Status: Published
• ISBN/ISSN/Other: ISSN: 0885-8950