Resilient decentralised control of inverter‐interfaced distributed energy sources in low‐voltage distribution grids. Issue 2 (11th February 2020)

• Record Type: Journal Article
• Authors: Nouri, Alireza; Soroudi, Alireza; Keane, Andrew
• Is Part Of: IET smart grid. Volume 3:Issue 2(2020)
• Page Start: 153
• Page End: 161
• Publication Date: 2020-02-11
• Subjects: decentralised control -- invertors -- voltage distribution -- power grids -- renewable energy sources -- reactive power control -- voltage control -- power distribution control; resilient decentralised control -- inverter‐interfaced distributed energy sources -- low‐voltage distribution grids -- RES -- optimal reactive power support -- volt–Var curve -- VVC -- active voltage management -- AVM technique -- active low‐voltage distribution systems -- inverters impedance identification capability -- real‐life suburban residential LVDS -- Dublin -- Ireland; B1210 Power electronics, supply and supervisory circuits -- B8110C Power system control -- B8120J Distribution networks -- C1340B Multivariable control systems -- C3110B Voltage control -- C3340H Control of electric power systems; Smart power grids -- Periodicals; Computer science -- Periodicals; Energy industries -- Periodicals; Broadcasting -- Periodicals; 333.79110285
• DOI: 10.1049/iet-stg.2019.0163
• Languages: English
• ISSNs: 2515-2947

Abstract

Abstract : This study shows that a relation can be found between the voltage at the terminals of an inverter‐interfaced renewable energy source (RES) and its optimal reactive power support. This relationship, known as volt–Var curve (VVC), enables the decentral operation of RES for active voltage management (AVM). Here the decentralised AVM technique is modified to consider the effects of the realistic operational constraints of RES. The AVM technique capitalises on the reactive power support capabilities of inverters to achieve the desired objective in unbalanced active low‐voltage distribution systems (LVDSs). However, as the results show, this AVM technique fails to satisfy the operator's objective when the network structure dynamically changes. By updating the VVCs according to the system configuration and components' availability, the objective functions will be significantly improved and the AVM method remains resilient against the network changes. To keep the decentralised structure, the impedance identification capability of inverters is used to locally find the system configuration. Adaptive VVCs enable the decentralised control of inverters in an online setting. A real‐life suburban residential LVDS in Dublin, Ireland, is used for showcasing the proposed method, and the effectiveness of the proposed resilient ACM technique is demonstrated.