Distributed control of power networks: Passivity, optimality and energy functions

Trip, S. 2017 [Groningen]: Rijksuniversiteit Groningen. 212 p.

Research output: ScientificDoctoral Thesis

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  • Title and contents

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  • Chapter 1

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  • Chapter 2

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  • Chapter 3

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  • Chapter 6

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  • Chapter 7

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  • Chapter 8

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    Embargo ends: 06/10/2018

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  • Summary

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  • Samenvatting

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  • Complete thesis

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  • Samenvatting

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Social and technological developments resulted in an increase of electricity demand, generated by an ever increasing amount of renewable energy sources. Despite its potential benefits, a continuation of these developments poses significant challenges to the planning and operation of the existing power networks. An important operational aspect in power networks is the regulation of its frequency, which is the focus of this work.

In the presence of more and smaller generation units, careful coordination among the individual parts in the power network is needed, ensuring proper overall functioning. We design and analyse distributed controllers, that ensure that actions taken by local controllers are consistent with global optimality objectives, such as the minimization of generation costs. The total energy of the power network plays a major role in this process, enabling the derivation of useful system theoretic properties without detailed knowledge of all components. Particularly, this work shows that energy functions are suitable to derive passivity properties of various nonlinear power system models, that form an excellent staring point for the controller design. Proposed controllers are shown to regulate the frequency and to obtain an economic dispatch.

We show that it is, although challenging, of importance to incorporate the generation side and the communication network explicitly in the design phase of controllers and that neglecting these aspects can result in an unjustified belief that stability of the network is guaranteed by suggested solutions.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • De Persis, Claudio, Supervisor
  • Cao, Ming, Assessment committee
  • Dörfler, E., Assessment committee, External person
  • Tabuada, Paulo, Assessment committee, External person
Award date6-Oct-2017
Place of Publication[Groningen]
Print ISBNs978-94-034-0062-4
Electronic ISBNs978-94-034-0061-7
StatePublished - 2017

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