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access icon openaccess Practical distributed voltage control method for efficient and equitable intervention of distributed devices

This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Received 02/09/2018, Accepted 03/05/2019, Revised 08/04/2019, Published 13/05/2019

Growing penetrations of distributed photovoltaic (PV) generation in low-voltage electrical networks are raising new challenges for electricity industry operation. Voltage rise is a particular concern and new distributed voltage management techniques have been proposed in the literature. In this study, a novel distributed voltage control method is presented. The method is designed to be used by both PV systems and controllable loads and uses both a voltage and a power set point to manage control. These set points, along with a voltage sensitivity measure, are then used to control PV system generation and load-shedding. The objective of the control is to keep voltage levels within operational limits with reasonable accuracy. The method is practical; local measurements of net-power and voltage are used with no additional communication infrastructure required. The proposed method is compared to a power set point only and a voltage set point only control method. Results show the proposed method improves on both methods in terms of both voltage accuracy and the equity of intervention.

Inspec keywords: load shedding; photovoltaic power systems; distributed control; distributed power generation; load regulation; voltage control; electricity supply industry

Other keywords: voltage sensitivity measure; PV systems; voltage rise; voltage accuracy; distributed devices; voltage set point; distributed voltage control method; low-voltage electrical networks; electricity industry operation; power set point; distributed voltage management techniques; distributed photovoltaic generation

Subjects: Power system management, operation and economics; Solar power stations and photovoltaic power systems; Power system control; Control of electric power systems; Distributed power generation; Voltage control; Multivariable control systems

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