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Investment analysis for optimal planning of electric vehicle charging station on a reconfigured unbalanced radial distribution system

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Abstract

The inclusion of electric vehicle charging stations (EVCS) on a practical radial distribution system (RDS) will increase the losses in the system. These losses can be minimized by introducing compensating devices like capacitors, distributed generators (DGs), or reconfiguring the RDS which increases the cost. This paper addresses an optimum placement of a DG on an optimally reconfigured unbalanced RDS (URDS) with reduced investments and losses. The objective function for optimizing the location and capacity of DG on a reconfigured URDS is chosen as the minimization of investments in DG installation and erection of tie-lines. The performance of the proposed strategy is validated for 19-bus and 25-bus URDS considering various scenarios. A comprehensive analysis of this study is provided under each scenario and is compared with the URDS having optimally placed EVCS and DG without reconfiguration.

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Abbreviations

DG:

Distributed generators

BIM:

Branch incidence matrix

kW:

Kilo Watts

EVCS:

Electric vehicle charging stations

URDS:

Unbalanced radial distribution systems

I br :

Branch current

I b :

Bus current

L br :

Branch loss

β xy :

New variable of branch ‘xy’

V x :

Voltage of bus ‘x’

S xy :

Complex power of branch ‘xy’

P xy :

Real power of branch ‘xy’

Q xy :

Reactive power of branch ‘xy’

S b :

Complex power of bus b

Z xy :

Impedance of branch ‘xy’

Y xy :

Admittance of branch ‘xy’

E c :

Erection cost coefficient

k L :

Loss cost coefficient

k g :

Generator installation coefficient

k M :

Maintenance cost coefficient

T l :

Tie-line logic

L T :

Length of tie-line in km

N t :

Number of tie-lines

N dg :

Number of DGs

P dg :

Real power rating of DG

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Authors and Affiliations

  1. Department of ECE, IIITDM Kancheepuram, Chennai, 600127, India

    M. Satish Kumar Reddy & K. Selvajyothi

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  1. M. Satish Kumar Reddy
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  2. K. Selvajyothi
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Correspondence to M. Satish Kumar Reddy.

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Kumar Reddy, M.S., Selvajyothi, K. Investment analysis for optimal planning of electric vehicle charging station on a reconfigured unbalanced radial distribution system. Electr Eng 104, 1725–1739 (2022). https://doi.org/10.1007/s00202-021-01404-4

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  • DOI: https://doi.org/10.1007/s00202-021-01404-4

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