access icon free Stochastic analysis of electric transportation charging impacts on power quality of distribution systems

© The Institution of Engineering and Technology
Received 26/01/2018, Accepted 15/03/2018, Published 16/03/2018

This work studies the power quality impacts of electric transportation charging including electric buses (EBs) and electric vehicles (EVs) on distribution systems. The stochastic harmonic models for EBs and EVs and the stochastic models for their usage scenarios are built utilising the measured charging data. Based on these models, a power quality analysis method considering the charging uncertainties of EBs and EVs is proposed in this study and then their impacts on distribution systems are investigated. The Monte Carlo simulation is integrated into the proposed method to study the under voltage, overcurrent, voltage unbalance, transformer overload, harmonic current, voltage etc. caused by the stochastic charging of EBs and EVs. An actual distribution system acquired from Taiwan Power Company is taken as an example to validate the practicability of the proposed method. The test results of the proposed stochastic model are compared with those of the conservative model.

Inspec keywords: power supply quality; harmonic analysis; stochastic processes; electric vehicle charging; distribution networks; power transformers; power system harmonics; transportation; Monte Carlo methods

Other keywords: electric bus; Taiwan Power Company; stochastic harmonic model; power quality analysis method; electric vehicle; EV; electric transportation charging; EB; distribution system; harmonic current; Monte Carlo simulation; transformer overload

Subjects: Transformers and reactors; Transportation; Monte Carlo methods; Distribution networks; Power supply quality and harmonics

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