A Load-Forecasting-Based Adaptive Parameter Optimization Strategy of STATCOM Using ANNs for Enhancement of LFOD in Power Systems

Tat Kei Chau, Samson Shenglong Yu, Tyrone Fernando, Herbert Ho-Ching Iu, Michael Small

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7 Citations (Scopus)

Abstract

This paper proposes a load-oriented control parameter optimization strategy for STATCOM to enhance low-frequency oscillation damping (LFOD) and improve stability of overall complex power systems. Frequency deviations of generators of interest are employed as the input signals of the designed supplementary damping controller of STATCOM. In order to obtain the optimal load-oriented control parameters, a day-ahead load-forecasting scheme is devised, using artificial neural network (ANN) learning techniques. The ANN is trained by a set of data over a 4-year period, and then the control parameters are optimized using Particle Swarm Optimization (PSO) technique by minimizing the critical damping index (CDI). The proposed control strategy is implemented in an IEEE standard complex power system, and the numerical results demonstrate that the low-frequency oscillations (LFOs) of the power system can be effectively mitigated using the proposed controller. Compared to conventional robust controller with universal parameters, this novel load-oriented optimal control strategy shows its superiority in alleviating LFOs and enhancing the overall stability of the power system. Since the proposed control scheme aims to adaptively adjust the controller parameters in correspondence to load variations, this study is envisaged to have practical utilizations in industrial applications.

Original languageEnglish
Pages (from-to)2463-2472
JournalIEEE Transactions on Industrial Informatics
Volume14
Issue number6
Early online date27 Oct 2017
DOIs
Publication statusPublished - Jun 2018

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Damping
Controllers
Neural networks
Particle swarm optimization (PSO)
Industrial applications
Static synchronous compensators

Cite this

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title = "A Load-Forecasting-Based Adaptive Parameter Optimization Strategy of STATCOM Using ANNs for Enhancement of LFOD in Power Systems",
abstract = "This paper proposes a load-oriented control parameter optimization strategy for STATCOM to enhance low-frequency oscillation damping (LFOD) and improve stability of overall complex power systems. Frequency deviations of generators of interest are employed as the input signals of the designed supplementary damping controller of STATCOM. In order to obtain the optimal load-oriented control parameters, a day-ahead load-forecasting scheme is devised, using artificial neural network (ANN) learning techniques. The ANN is trained by a set of data over a 4-year period, and then the control parameters are optimized using Particle Swarm Optimization (PSO) technique by minimizing the critical damping index (CDI). The proposed control strategy is implemented in an IEEE standard complex power system, and the numerical results demonstrate that the low-frequency oscillations (LFOs) of the power system can be effectively mitigated using the proposed controller. Compared to conventional robust controller with universal parameters, this novel load-oriented optimal control strategy shows its superiority in alleviating LFOs and enhancing the overall stability of the power system. Since the proposed control scheme aims to adaptively adjust the controller parameters in correspondence to load variations, this study is envisaged to have practical utilizations in industrial applications.",
keywords = "Artificial neural networks, Automatic voltage control, Damping, Generators, Load forecasting, Load modeling, Low-frequency oscillation damping control, Mathematical model, Power system stability, PSO, STATCOM",
author = "Chau, {Tat Kei} and Yu, {Samson Shenglong} and Tyrone Fernando and {Ho-Ching Iu}, Herbert and Michael Small",
year = "2018",
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language = "English",
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T1 - A Load-Forecasting-Based Adaptive Parameter Optimization Strategy of STATCOM Using ANNs for Enhancement of LFOD in Power Systems

AU - Chau, Tat Kei

AU - Yu, Samson Shenglong

AU - Fernando, Tyrone

AU - Ho-Ching Iu, Herbert

AU - Small, Michael

PY - 2018/6

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N2 - This paper proposes a load-oriented control parameter optimization strategy for STATCOM to enhance low-frequency oscillation damping (LFOD) and improve stability of overall complex power systems. Frequency deviations of generators of interest are employed as the input signals of the designed supplementary damping controller of STATCOM. In order to obtain the optimal load-oriented control parameters, a day-ahead load-forecasting scheme is devised, using artificial neural network (ANN) learning techniques. The ANN is trained by a set of data over a 4-year period, and then the control parameters are optimized using Particle Swarm Optimization (PSO) technique by minimizing the critical damping index (CDI). The proposed control strategy is implemented in an IEEE standard complex power system, and the numerical results demonstrate that the low-frequency oscillations (LFOs) of the power system can be effectively mitigated using the proposed controller. Compared to conventional robust controller with universal parameters, this novel load-oriented optimal control strategy shows its superiority in alleviating LFOs and enhancing the overall stability of the power system. Since the proposed control scheme aims to adaptively adjust the controller parameters in correspondence to load variations, this study is envisaged to have practical utilizations in industrial applications.

AB - This paper proposes a load-oriented control parameter optimization strategy for STATCOM to enhance low-frequency oscillation damping (LFOD) and improve stability of overall complex power systems. Frequency deviations of generators of interest are employed as the input signals of the designed supplementary damping controller of STATCOM. In order to obtain the optimal load-oriented control parameters, a day-ahead load-forecasting scheme is devised, using artificial neural network (ANN) learning techniques. The ANN is trained by a set of data over a 4-year period, and then the control parameters are optimized using Particle Swarm Optimization (PSO) technique by minimizing the critical damping index (CDI). The proposed control strategy is implemented in an IEEE standard complex power system, and the numerical results demonstrate that the low-frequency oscillations (LFOs) of the power system can be effectively mitigated using the proposed controller. Compared to conventional robust controller with universal parameters, this novel load-oriented optimal control strategy shows its superiority in alleviating LFOs and enhancing the overall stability of the power system. Since the proposed control scheme aims to adaptively adjust the controller parameters in correspondence to load variations, this study is envisaged to have practical utilizations in industrial applications.

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KW - Low-frequency oscillation damping control

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KW - PSO

KW - STATCOM

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