Open AccessNovel coordinated secondary voltage control strategy for efficient utilisation of distributed generations
Author(s) -
Alobeidli Khaled,
El Moursi Mohamed Shawky
Publication year - 2014
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
ISSN - 1752-1424
DOI - 10.1049/iet-rpg.2013.0135
Subject(s) - tap changer , ac power , voltage regulation , distributed generation , voltage optimisation , voltage , engineering , control theory (sociology) , power control , electric power system , computer science , control engineering , transformer , power (physics) , renewable energy , electrical engineering , control (management) , physics , quantum mechanics , artificial intelligence
This study presents a novel coordinated secondary voltage control (CSVC) and reactive power management scheme for efficient utilisation of distributed energy resources in a smart distribution network. The proposed controller is developed to achieve efficient voltage regulation and to maximise the dynamic reactive power reserve in a distribution network to react during system contingencies. The simulated distribution system, including an on‐load tap changer (OLTC) and distributed energy resources, is implemented using PSCAD/EMTDC. The CSVC is designed to provide slow and medium speed responses, using low‐pass filters for OLTC and diesel generators, respectively, and a fast response by utilising inverter‐based distributed energy resources. Therefore it applies a control strategy with different bandwidth dedicated by the decentralised voltage controllers and reactive power management scheme. The CSVC is used to enhance the bus voltage control by utilising the reactive power loading capabilities among distributed energy resources and on‐load tap changers of the substation transformer. A comprehensive simulation has verified the superior performance of the proposed coordinated secondary voltage control with the reactive power management scheme for enhancing the voltage profile and the fault ride‐through capability, ensuring higher dynamic reactive power reserves in a distribution network, and improving the transient stability margin.