Abstract
Widely used distribution generations (DGs) and energy storage systems (ESSs) enable a distribution system to have a more flexible fault reconfiguration capability. In order to enhance the service reliability and the benefit of distribution networks with DGs and ESSs, this paper proposes a novel distribution system reconfiguration (DSR) model including DGs and ESSs. Meanwhile, the impact of sectionalizing switches and tie switches on reliability is considered. The concept of “boundary switch” is introduced for quantifying the customer interruption duration. The DSR model is presented to minimize the sum of the customer interruption cost, the operation cost of switches, and the depreciation cost of DGs and ESSs. Furthermore, the proposed model is converted into a mixed-integer linear programming, which can be efficiently solved by commercial solvers. Finally, the validity and efficiency of the proposed DSR model are verified by a modified IEEE 33-bus system and a modified PG&E69-bus network. The obtained results indicate the advantages of DGs and ESSs in reducing outage time, and suggest that the types and locations of SSs have great effects on the resulting benefit of DGs and ESSs.
Highlights
Due to a shortage of resources and the pressure arising from environmental degradation, the government has increased its demands for energy savings and carbon emissions reductions.Distributed generations (DGs) [1,2], as flexible and usually environmentally friendly sources, have attracted the attention of electric utilities
The proposed distribution system reconfiguration (DSR) model is implemented in the Python 2.7 [26] environment and solved using the mixed-integer programming (MIP) solver CPLEX 12.7 [27] on a 3.4-GHz processor with 8 GB of random-access memory, and the optimality gap of CPLEX is set to 0%
This paper proposes a quantification method for the customer interruption duration based on the “boundary switch.”
Summary
Due to a shortage of resources and the pressure arising from environmental degradation, the government has increased its demands for energy savings and carbon emissions reductions. At the same time, sectionalizing switches (SSs) and tie switches (TSs) can change the structure of a distribution network during reconfiguration [5], which would have a direct impact on the reliability of the overall system In this regard, it is worthwhile to conduct a reliability-based method of DSR considering DGs, ESSs, and SSs, which is the focus of this paper. The model described in [20] presented a method for determining the minimum loss configuration in distribution networks with uncertain load and DGs. The authors of [21] proposed a multi-objective approach for network reconfiguration with optimal DG power factor.
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