Evaluation of the impact of variable system inertia on the performance of frequency based protection

Research output: Contribution to conferencePaper

Abstract

In addition to the anticipated gradual reduction of system inertia in the future, its variability due to more flexible system control and management over time will also be an issue in future power system operation. This paper focuses on the impact of inertia reduction and variation on existing frequency-based protection during loss of large infeed contingency, with the UK power system used as a basis for the studies conducted. Two protection issues are identified by evaluating the impact of variable system inertia under different system conditions: the 1Hz/s RoCoF setting proposed by the UK distribution code review panel cannot effectively stabilise anti-islanding protection in locations relatively closer to the disturbance in future networks with the planned increase of infrequent infeed loss; underfrequency load shedding (UFLS) (based on existing settings) in a relatively weak system where load is mainly supported by naturally low inertia renewables may mal-operate more often which results in more interruptions to customers. In order to maintain system stability and integrity against aforementioned protection issues, three alternative methods are discussed with a focus on regional based adaptive protection.

Conference

ConferenceDPSP 2014: The 12th International Conference on Developments in Power System Protection
CountryDenmark
CityCopenhagen
Period31/03/143/04/14

Fingerprint

System stability
Control systems

Keywords

  • low inertia power system
  • adaptive protection
  • frequency response
  • anti-islanding protection
  • underfrequency load shedding

Cite this

Cao, X., Abdulhadi, I. F., Emhemed, A., Burt, G., & Booth, C. (2014). Evaluation of the impact of variable system inertia on the performance of frequency based protection. Paper presented at DPSP 2014: The 12th International Conference on Developments in Power System Protection, Copenhagen, Denmark.
Cao, Xue ; Abdulhadi, Ibrahim Faiek ; Emhemed, Abdullah ; Burt, Graeme ; Booth, Campbell. / Evaluation of the impact of variable system inertia on the performance of frequency based protection. Paper presented at DPSP 2014: The 12th International Conference on Developments in Power System Protection, Copenhagen, Denmark.
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abstract = "In addition to the anticipated gradual reduction of system inertia in the future, its variability due to more flexible system control and management over time will also be an issue in future power system operation. This paper focuses on the impact of inertia reduction and variation on existing frequency-based protection during loss of large infeed contingency, with the UK power system used as a basis for the studies conducted. Two protection issues are identified by evaluating the impact of variable system inertia under different system conditions: the 1Hz/s RoCoF setting proposed by the UK distribution code review panel cannot effectively stabilise anti-islanding protection in locations relatively closer to the disturbance in future networks with the planned increase of infrequent infeed loss; underfrequency load shedding (UFLS) (based on existing settings) in a relatively weak system where load is mainly supported by naturally low inertia renewables may mal-operate more often which results in more interruptions to customers. In order to maintain system stability and integrity against aforementioned protection issues, three alternative methods are discussed with a focus on regional based adaptive protection.",
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Cao, X, Abdulhadi, IF, Emhemed, A, Burt, G & Booth, C 2014, 'Evaluation of the impact of variable system inertia on the performance of frequency based protection' Paper presented at DPSP 2014: The 12th International Conference on Developments in Power System Protection, Copenhagen, Denmark, 31/03/14 - 3/04/14, .

Evaluation of the impact of variable system inertia on the performance of frequency based protection. / Cao, Xue; Abdulhadi, Ibrahim Faiek; Emhemed, Abdullah; Burt, Graeme; Booth, Campbell.

2014. Paper presented at DPSP 2014: The 12th International Conference on Developments in Power System Protection, Copenhagen, Denmark.

Research output: Contribution to conferencePaper

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AU - Abdulhadi, Ibrahim Faiek

AU - Emhemed, Abdullah

AU - Burt, Graeme

AU - Booth, Campbell

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AB - In addition to the anticipated gradual reduction of system inertia in the future, its variability due to more flexible system control and management over time will also be an issue in future power system operation. This paper focuses on the impact of inertia reduction and variation on existing frequency-based protection during loss of large infeed contingency, with the UK power system used as a basis for the studies conducted. Two protection issues are identified by evaluating the impact of variable system inertia under different system conditions: the 1Hz/s RoCoF setting proposed by the UK distribution code review panel cannot effectively stabilise anti-islanding protection in locations relatively closer to the disturbance in future networks with the planned increase of infrequent infeed loss; underfrequency load shedding (UFLS) (based on existing settings) in a relatively weak system where load is mainly supported by naturally low inertia renewables may mal-operate more often which results in more interruptions to customers. In order to maintain system stability and integrity against aforementioned protection issues, three alternative methods are discussed with a focus on regional based adaptive protection.

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KW - adaptive protection

KW - frequency response

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Cao X, Abdulhadi IF, Emhemed A, Burt G, Booth C. Evaluation of the impact of variable system inertia on the performance of frequency based protection. 2014. Paper presented at DPSP 2014: The 12th International Conference on Developments in Power System Protection, Copenhagen, Denmark.