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Evaluation of new voltage operating strategies for integration of distributed generation into distribution networks

Plecas, Milana and Gill, Simon and Kockar, Ivana and Anderson, Ross (2017) Evaluation of new voltage operating strategies for integration of distributed generation into distribution networks. In: 2016 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe). IEEE, Piscataway, N.J.. ISBN 978-1-5090-3359-1

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With the increasing number of distributed generation connections to distribution networks, the need for better understanding of the distribution network constraints becomes crucial. As distribution networks have not been traditionally designed for two-way power flow, the reverse power flows due to the integration of distributed generation changes voltage profiles and can create significant network management issues related to both thermal and voltage limits. Whilst a large body of theory exists on the management of voltage profiles and the integration of distributed generation into voltage-constrained feeders, there has been limited real world application of these methods to date, in part because network operators are reluctant to undertake significant changes that may affect the reliability of their network. This paper provides a case study of three adjustments to existing management of an 11kV feeder that are simple and feasible to implement and evaluates their impact on connection capacity for distributed generation including the importance of location. These adjustments are: increased operational upper-voltage levels, simple demand-management, and non-firm connections to manage local voltage constraints.