Optimal decentralized primary frequency control in power networks

We augment existing generator-side primary frequency control with load-side control that are local, ubiquitous, and continuous. The mechanisms on both the generator and the load sides are decentralized in that their control decisions are functions of locally measurable frequency deviations. These lo...

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Bibliographic Details
Published in:53rd IEEE Conference on Decision and Control pp. 2467 - 2473
Main Authors: Changhong Zhao, Low, Steven
Format: Conference Proceeding
Language:English
Published: IEEE 01.12.2014
Subjects:
Asymptotic stability
Closed loop systems
Frequency control
Frequency measurement
Generators
Lyapunov methods
Stability analysis
ISBN:9781479977468, 1479977462
ISSN:0191-2216
Online Access:Get full text
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Summary:We augment existing generator-side primary frequency control with load-side control that are local, ubiquitous, and continuous. The mechanisms on both the generator and the load sides are decentralized in that their control decisions are functions of locally measurable frequency deviations. These local algorithms interact over the network through nonlinear power flows. We design the local frequency feedback control so that any equilibrium point of the closed-loop system is the solution to an optimization problem that minimizes the total generation cost and user disutility subject to power balance across entire network. With Lyapunov method we derive a sufficient condition for any equilibrium point of the closed-loop system to be asymptotically stable. A simulation demonstrates improvement in both the transient and steady-state performance over the traditional control only on generators, even when the total control capacity remains the same.
ISBN:9781479977468
1479977462
ISSN:0191-2216
DOI:10.1109/CDC.2014.7039765