access icon openaccess Two-stage restoration strategies for power systems considering coordinated dispatch between plug-in electric vehicles and wind power units

This is an open access article published by the IET under the Creative Commons Attribution -NonCommercial License (http://creativecommons.org/licenses/by-nc/3.0/)
Received 15/06/2019, Accepted 22/11/2019, Revised 08/11/2019, Published 04/12/2019

With increased penetration of wind power units and plug-in electric vehicles (PEVs), their control flexibility and quick response potentially provide an alternative way to fulfil the need for rapid restoration. A two-stage restoration strategy optimisation approach is presented with the coordination of PEVs and wind power units considered. The optimisation model is to maximise the restored generation capability and minimise the fluctuation of cranking power. In the first stage, the aim is to provide reliable cranking power remotely for black start generators through coordinated dispatch of PEVs and wind power units and quadratic programming (QP) models for dispatching electric vehicle aggregators (EVAs) subject to wind power fluctuations, and for dispatching numerous PEVs within each EVA are developed. To ensure close coordination between these two dispatching procedures, bi-level programming-based hierarchical decomposition approach is used to solve the QP models in an iterative way. In the second stage, an integer linear programming model is proposed to optimise the restoration schedules through an effective transformation of the original non-linear formulation, so as to reduce the computing time and effort significantly. Finally, a case study is presented to demonstrate the effectiveness and essential features of the developed models and methods.

Inspec keywords: scheduling; electric vehicles; power generation dispatch; quadratic programming; wind power plants; integer programming; power system restoration; optimisation; power generation economics; battery powered vehicles; linear programming

Other keywords: plug-in electric vehicles; reliable cranking power; coordinated dispatch; minimise; wind power units; restored generation capability; electric vehicle aggregators; stage restoration strategies; two-stage restoration strategy optimisation approach; power systems; power fluctuations

Subjects: Optimisation techniques; Wind power plants; Optimisation techniques; Power system management, operation and economics; Transportation

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