Online hierarchical and distributed method for voltage control in distribution smart grids

This study proposes a coordinated and distributed smart grid based method for optimal set points of distributed generators (DGs) as well as on-load tap changer (OLTC) transformer in the unbalanced power distribution grid. In this approach, energy efficiency is improved and voltage profile is kept in...

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Bibliographic Details
Published in:IET generation, transmission & distribution Vol. 11; no. 5; pp. 1223 - 1232
Main Authors: Fallahzadeh-Abarghouei, Hossein, Nayeripour, Majid, Hasanvand, Saeed, Waffenschmidt, Eberhard
Format: Journal Article
Language:English
Published: The Institution of Engineering and Technology 30.03.2017
Subjects:
coordinated smart grid based method
distributed control
distributed generator optimal set point
distributed gradient algorithm
distributed power generation
distributed smart grid based method
distribution smart grid
energy conservation
energy efficiency
gradient methods
hierarchical systems
OLTC transformer
on load tap changers
online hierarchical method
on‐load tap changer transformer
power distribution control
power generation control
renewable energy resource
renewable energy sources
Research Article
smart power grids
three distribution test system
unbalanced power distribution grid
voltage control
voltage profile
voltage violation elimination
power distribution control
power generation control
smart power grids
distributed power generation
distributed generator optimal set point
energy efficiency
voltage violation elimination
voltage profile
gradient methods
on load tap changers
renewable energy sources
distributed control
coordinated smart grid based method
distributed gradient algorithm
hierarchical systems
unbalanced power distribution grid
renewable energy resource
distribution smart grid
online hierarchical method
three distribution test system
distributed smart grid based method
energy conservation
OLTC transformer
on-load tap changer transformer
voltage control
ISSN:1751-8687, 1751-8695
Online Access:Get full text
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Summary:This study proposes a coordinated and distributed smart grid based method for optimal set points of distributed generators (DGs) as well as on-load tap changer (OLTC) transformer in the unbalanced power distribution grid. In this approach, energy efficiency is improved and voltage profile is kept in an acceptable range under different operating conditions of renewable energy resources and loads. In the first level of proposed hierarchical method, DGs are independently trying to keep voltage profile in an acceptable range in an optimal way. If the first level is not succeeding, at the second level, OLTC cooperates with the first level to eliminate the voltage violation in the system. The rules for updating control setting are derived based on distributed gradient algorithm. The proposed distributed solution presents analogous steady state results in comparison with centralised optimisation solution. Since the processing data is reduced, short-timed response to change operating conditions could be achieved. Simulation results on three distribution test systems with different sizes demonstrate the effectiveness of proposed control solution.
ISSN:1751-8687
1751-8695
DOI:10.1049/iet-gtd.2016.1096