Predictive Voltage Control for LV Distribution Grids exploiting Flexibility from Domestic Customers

Abstract

In order to avoid voltage problems derived from the connection of large amounts of renewable-based energy generation to distribution networks, new advanced tools need to be developed that are able to exploit the presence of Distributed Energy Resources (DER). This paper describes the approach proposed for a predictive voltage control algorithm to be used in LV distribution networks in order to make use of available flexibilities from domestic consumers via their Home Energy Management System (HEMS) and more traditional Distribution System Operator's (DSO's) resources, such as transformers with On-Load Tap Changer (OLTC) and storage devices. The proposed algorithm for the Low Voltage Control (LVC) is detailed in this paper. The algorithm was then tested through simulation using a representative Portuguese Low Voltage (LV) network in order to assess its performance in several future scenarios with different operating conditions. The future prospects for field-trial validation in a Portuguese smart grids pilot are also discussed.

Predictive Voltage Control: Empowering Domestic Customers With a Key Role in the Active Management of LV Networks

“…Its aim is to identify a set of preventive control actions that can be implemented by the DSO in order to avoid foreseeable technical problems in the LV grid, such as voltage violations or branch/transformer overloads. Preliminary results, with a test LV network and typical load and generation profiles are presented in Reference [24]. In this work, the proposed LVC algorithm is described, and extensive results from simulations performed on real LV networks were obtained and partially presented in this paper.…”