Continuous Under-Frequency Load Shedding Scheme for Power System Adaptive Frequency Control

Li, Changgang; Wu, Yue; Sun, Yanli; Zhang, Hengxu; Liu, Yutian; Liu, Yilu; Terzija, Vladimir

doi:10.1109/tpwrs.2019.2943150

Title: Continuous Under-Frequency Load Shedding Scheme for Power System Adaptive Frequency Control

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Abstract

Frequency drop due to loss of massive generation is a threat to power system frequency stability. Under-frequency load shedding (UFLS) is the principal measure to prevent successive frequency declination and blackouts. Based on traditional stage-by-stage UFLS scheme, a new continuous UFLS scheme is proposed in this paper to shed loads proportional to frequency deviation. The characteristic of the proposed scheme is analyzed with a closed-form solution of frequency dynamics. Frequency threshold and time delay are added to make the proposed scheme practical. A line-by-line scheme based on precise load control is introduced to implement the continuous scheme for systems without enough continuously controllable loads. The load shedding scale factor of the proposed scheme is tuned with an analytical method to achieve adaptability to different operating conditions. Furthermore, the adaptability of the proposed scheme is validated with 39-bus New England model and simplified Shandong Power Grid of China.

Authors:

^[1]; Wu, Yue ^[1]; Sun, Yanli ^[1];

^[1];

^[2];

^[3]

Shandong Univ., Jinan (China)
Univ. of Tennessee, Knoxville, TN (United States)
Univ. of Manchester (United Kingdom)

Publication Date:: Thu Sep 26 00:00:00 EDT 2019

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1823370

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Transactions on Power Systems

Additional Journal Information:: Journal Volume: 35; Journal Issue: 2; Journal ID: ISSN 0885-8950

Publisher:: IEEE

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; Power systems; frequency stability; under-frequency load shedding (UFLS); continuous control; precise load control

Citation Formats


                    Li, Changgang, Wu, Yue, Sun, Yanli, Zhang, Hengxu, Liu, Yutian, Liu, Yilu, and Terzija, Vladimir. Continuous Under-Frequency Load Shedding Scheme for Power System Adaptive Frequency Control.  United States: N. p., 2019. 
Web.  doi:10.1109/tpwrs.2019.2943150.

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                    Li, Changgang, Wu, Yue, Sun, Yanli, Zhang, Hengxu, Liu, Yutian, Liu, Yilu, & Terzija, Vladimir. Continuous Under-Frequency Load Shedding Scheme for Power System Adaptive Frequency Control.  United States.  https://doi.org/10.1109/tpwrs.2019.2943150

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                    Li, Changgang, Wu, Yue, Sun, Yanli, Zhang, Hengxu, Liu, Yutian, Liu, Yilu, and Terzija, Vladimir. Thu .  
"Continuous Under-Frequency Load Shedding Scheme for Power System Adaptive Frequency Control".  United States.  https://doi.org/10.1109/tpwrs.2019.2943150.  https://www.osti.gov/servlets/purl/1823370.

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@article{osti_1823370,

  title        = {Continuous Under-Frequency Load Shedding Scheme for Power System Adaptive Frequency Control},

  author       = {Li, Changgang and Wu, Yue and Sun, Yanli and Zhang, Hengxu and Liu, Yutian and Liu, Yilu and Terzija, Vladimir},

  abstractNote = {Frequency drop due to loss of massive generation is a threat to power system frequency stability. Under-frequency load shedding (UFLS) is the principal measure to prevent successive frequency declination and blackouts. Based on traditional stage-by-stage UFLS scheme, a new continuous UFLS scheme is proposed in this paper to shed loads proportional to frequency deviation. The characteristic of the proposed scheme is analyzed with a closed-form solution of frequency dynamics. Frequency threshold and time delay are added to make the proposed scheme practical. A line-by-line scheme based on precise load control is introduced to implement the continuous scheme for systems without enough continuously controllable loads. The load shedding scale factor of the proposed scheme is tuned with an analytical method to achieve adaptability to different operating conditions. Furthermore, the adaptability of the proposed scheme is validated with 39-bus New England model and simplified Shandong Power Grid of China.},

  doi          = {10.1109/tpwrs.2019.2943150},

  journal      = {IEEE Transactions on Power Systems},

  number       = 2,

  volume       = 35,

  place        = {United States},

  year         = {Thu Sep 26 00:00:00 EDT 2019},

  month        = {Thu Sep 26 00:00:00 EDT 2019}

}

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