Coordinative real‐time sub‐transmission volt–var control for reactive power regulation between transmission and distribution systems. Issue 11 (14th November 2018)

• Record Type: Journal Article
• Authors: Ke, Xinda; Samaan, Nader; Holzer, Jesse; Huang, Renke; Vyakaranam, Bharat; Vallem, Mallikarjuna; Elizondo, Marcelo; Lu, Ning; Zhu, Xiangqi; Werts, Brant; Nguyen, Quan; Huang, Alex; Makarov, Yuri V.
• Is Part Of: IET generation, transmission & distribution. Volume 13:Issue 11(2019)
• Page Start: 2006
• Page End: 2014
• Publication Date: 2018-11-14
• Subjects: load flow -- power distribution control -- voltage control -- load dispatching -- reactive power control -- demand side management -- power transmission control; sub‐transmission volt–var control -- reactive power regulation -- optimal reactive power dispatch -- distributed energy resources -- virtual power plants -- sub‐transmission level -- AC optimal power flow technique -- distribution VVC algorithm -- VPP reactive power control -- sub‐transmission service requirements -- reactive power capability -- sub‐transmission controller -- Duke Energy Carolina system -- DER -- VPP -- voltage deviations -- solar curtailment -- demand response usage -- coordinative real‐time sub‐transmission volt–var control -- load buses -- mechanical switching -- reactive power dispatching; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2018.5850
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : This study introduces a new approach for coordinating volt–var control (VVC) between sub‐transmission and distribution systems through optimal reactive power dispatch of distributed energy resources (DERs) that are aggregated as virtual power plants (VPPs). At the sub‐transmission level, shunt devices and the reactive power provided by the VPPs are coordinated and optimised using a VVC algorithm with weighted sum of multiple objects that include minimising voltage deviations from desirable levels at load buses, minimising loses, minimising solar curtailment, minimising demand response usage and minimising mechanical switching of shunt elements. The algorithm runs every 5 min and is solved using the AC optimal power flow technique. At the distribution level, each VPP runs a distribution VVC algorithm to dispatch reactive power from DERs. The goal of the VPP reactive power control is to meet sub‐transmission service requirements while satisfying all the constraints at the distribution side. Each VPP updates its reactive power capability every 5 min to allow the sub‐transmission controller to formulate the optimisation problem for the next dispatch interval. The proposed tool is simulated on a Duke Energy Carolina system to demonstrate the capability of providing voltage support by dispatching reactive power of DERs as a VPP.