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Analysis of integrated CVR control performance with high EV penetrations

Conservation voltage reduction (CVR) technique has been widely implemented by many utilities to provide energy savings and loss reductions. However, the integration of new low carbon technologies (LCTs) such as electric vehicles (EV) have interfered the control scheme and performance of CVR. It also made the distribution networks more vulnerable to the voltage variation. Various CVR control schemes have been investigated on passive distribution networks without the consideration of the new LCT loads and generators. This paper presents the study of integrated CVR control scheme on a typical distribution network with different EV penetrations and analyzes the impact of EV penetrations on CVR performance. High granularity load modelling is carried out to generate aggregated time-varying ZIP load models and coordinated vehicle-to-grid (V2G) EV models. The network and load models are implemented in OpenDSS and the time-series and CVR control algorithm are driven by Matlab. Results are analyzed which show limited voltage reductions and less CVR effectiveness on the networks with higher EV penetrations.