A Two-Stage Distributed Architecture for Voltage Control in Power Distribution Systems

In this paper, we propose an architecture for voltage regulation in distribution networks that relies on controlling reactive power injections provided by distributed energy resources (DERs). A local controller on each bus of the network monitors the bus voltage and, whenever there is a voltage viol...

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Bibliographic Details
Published in:IEEE transactions on power systems Vol. 28; no. 2; pp. 1470 - 1482
Main Authors: Robbins, Brett A., Hadjicostis, Christoforos N., Dominguez-Garcia, Alejandro D.
Format: Journal Article
Language:English
Published: New York IEEE 01.05.2013
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Algorithms
Architecture
Buses
Buses (vehicles)
Density estimation robust algorithm
Distributed algorithms
Distributed control
distributed power generation
Electric potential
Electric utilities
Electricity distribution
energy resources
Monitoring
Networks
Power distribution
power systems
Reactive power
reactive power control
Sensitivity
Voltage
Voltage control
ISSN:0885-8950, 1558-0679
Online Access:Get full text
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Summary:In this paper, we propose an architecture for voltage regulation in distribution networks that relies on controlling reactive power injections provided by distributed energy resources (DERs). A local controller on each bus of the network monitors the bus voltage and, whenever there is a voltage violation, it uses locally available information to estimate the amount of reactive power that needs to be injected into the bus in order to correct the violation. If the DERs connected to the bus can collectively provide the reactive power estimated by the local controller, they are instructed to do so. Otherwise, the local controller initiates a request for additional reactive power support from other controllers at neighboring buses through a distributed algorithm that relies on a local exchange of information among neighboring controllers. We show that the proposed architecture helps prevent voltage violations and shapes the voltage profile in radial distribution networks, even in the presence of considerable penetration of variable generation and loads. We present several case studies involving 8-, 13-, and 123-bus distribution systems to illustrate the operation of the architecture.
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ISSN:0885-8950
1558-0679
DOI:10.1109/TPWRS.2012.2211385