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Title: Power System Decomposition for Practical Implementation of Bulk-Grid Voltage Control Methods

Abstract

Power system algorithms such as AC optimal power flow and coordinated volt/var control of the bulk power system are computationally intensive and become difficult to solve in operational time frames. The computational time required to run these algorithms increases exponentially as the size of the power system increases. The solution time for multiple subsystems is less than that for solving the entire system simultaneously, and the local nature of the voltage problem lends itself to such decomposition. This paper describes an algorithm that can be used to perform power system decomposition from the point of view of the voltage control problem. Our approach takes advantage of the dominant localized effect of voltage control and is based on clustering buses according to the electrical distances between them. One of the contributions of the paper is to use multidimensional scaling to compute n-dimensional Euclidean coordinates for each bus based on electrical distance to perform algorithms like K-means clustering. A simple coordinated reactive power control of photovoltaic inverters for voltage regulation is used to demonstrate the effectiveness of the proposed decomposition algorithm and its components. The proposed decomposition method is demonstrated on the IEEE 118-bus system.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1411931
Report Number(s):
PNNL-SA-127147
SL0300000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: 19th International conference on Intelligent system Applications to Power Systems (ISAP 2017), September 17-20, 2017, San Antonio, Texas
Country of Publication:
United States
Language:
English
Subject:
power system decomposition; voltage control; optimal power flow; multidimensional scaling

Citation Formats

Vallem, Mallikarjuna R., Vyakaranam, Bharat GNVSR, Holzer, Jesse T., Elizondo, Marcelo A., and Samaan, Nader A. Power System Decomposition for Practical Implementation of Bulk-Grid Voltage Control Methods. United States: N. p., 2017. Web. doi:10.1109/ISAP.2017.8071378.
Vallem, Mallikarjuna R., Vyakaranam, Bharat GNVSR, Holzer, Jesse T., Elizondo, Marcelo A., & Samaan, Nader A. Power System Decomposition for Practical Implementation of Bulk-Grid Voltage Control Methods. United States. doi:10.1109/ISAP.2017.8071378.
Vallem, Mallikarjuna R., Vyakaranam, Bharat GNVSR, Holzer, Jesse T., Elizondo, Marcelo A., and Samaan, Nader A. Thu . "Power System Decomposition for Practical Implementation of Bulk-Grid Voltage Control Methods". United States. doi:10.1109/ISAP.2017.8071378.
@article{osti_1411931,
title = {Power System Decomposition for Practical Implementation of Bulk-Grid Voltage Control Methods},
author = {Vallem, Mallikarjuna R. and Vyakaranam, Bharat GNVSR and Holzer, Jesse T. and Elizondo, Marcelo A. and Samaan, Nader A.},
abstractNote = {Power system algorithms such as AC optimal power flow and coordinated volt/var control of the bulk power system are computationally intensive and become difficult to solve in operational time frames. The computational time required to run these algorithms increases exponentially as the size of the power system increases. The solution time for multiple subsystems is less than that for solving the entire system simultaneously, and the local nature of the voltage problem lends itself to such decomposition. This paper describes an algorithm that can be used to perform power system decomposition from the point of view of the voltage control problem. Our approach takes advantage of the dominant localized effect of voltage control and is based on clustering buses according to the electrical distances between them. One of the contributions of the paper is to use multidimensional scaling to compute n-dimensional Euclidean coordinates for each bus based on electrical distance to perform algorithms like K-means clustering. A simple coordinated reactive power control of photovoltaic inverters for voltage regulation is used to demonstrate the effectiveness of the proposed decomposition algorithm and its components. The proposed decomposition method is demonstrated on the IEEE 118-bus system.},
doi = {10.1109/ISAP.2017.8071378},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Oct 19 00:00:00 EDT 2017},
month = {Thu Oct 19 00:00:00 EDT 2017}
}

Conference:
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