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Title: Primary frequency regulation in power networks with ancillary service from load-side participation
Authors: Kasis, Andreas 
Devane, Eoin 
Lestas, Ioannis 
Keywords: Subgradient methods;Power allocation
Category: Mechanical Engineering
Field: Engineering and Technology
Issue Date: Jul-2017
Publisher: Elsevier B.V.
Source: IFAC-PapersOnLine, 2017, vol. 50, no. 1, pp. 4394-4399
Journal: IFAC-PapersOnLine 
Abstract: We consider the problem of designing distributed generation and demand control schemes that provide ancillary service in primary frequency regulation in power networks such that stability and fairness in the power allocation can be guaranteed. It is desirable in such schemes that load side participation in frequency control is activated only when the frequency exceeds prescribed thresholds so as to avoid frequent intervention in the operation of loads. This, however, leads to nonlinear control schemes with vector fields with discontinuous derivatives. In this paper, we investigate how stability and optimality may be ensured when such dynamics are considered. We show that subgradient methods can be used to derive decentralised conditions that ensure optimality of the equilibrium points. Decentralised conditions for asymptotic stability that are valid in this context are also provided. We illustrate our results with simulations on the IEEE 68 bus system, where it is demonstrated that the inclusion of controllable loads offers improved transient behaviour and that an optimal power allocation among controllable loads is achieved.
ISSN: 2405-8963
DOI: 10.1016/j.ifacol.2017.08.888
Rights: © 2017 IFAC
Type: Article
Appears in Collections:Άρθρα/Articles

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