Estimation of power imbalance size with consideration of impact of emulated inertia

Qiteng Hong, Campbell Booth, Bin Wang, Xinzhou Dong, Liang Ji

Research output: Contribution to conferencePaper

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Abstract

Accurate estimation of power imbalance (e.g. loss of generation size) during frequency disturbance events is of vital importance for effective power system monitoring and control. Conventional methods for power imbalance estimation are mainly based on the swing equation, where the size of power imbalance is calculated using the measured Rate of Change of Frequency (RoCoF) and the inertia level of the system. With the increasing penetration of renewable generation, the system inertia has decreased significantly. Inertia emulation is considered as a promising solution for enhancing frequency stability in future power systems. However, the emulated inertia, acting in a similar manner of true inertia, could have an impact on the measured RoCoF, which will subsequently affect the accuracy of the power imbalance estimation using conventional methods. Therefore, this paper presents a comprehensive evaluation of the impact of such emulated inertial response on the RoCoF behaviour during frequency disturbances, thus the impact on the accuracy of power imbalance estimation. A new power imbalance estimation method that takes into account of the impact of emulated inertia is proposed. Case studies using both an analytical model and a microgrid model simulated in a real-time simulator are presented, which demonstrate that the proposed power imbalance estimation method could achieve significantly higher estimation accuracy compared to conventional methods, thus offering an effective solution for estimating frequency disturbance sizes in systems with emulated inertia.
Original languageEnglish
Number of pages5
Publication statusPublished - 21 Oct 2019
Event8th International Conference on Advanced Power System Automation and Protection - Xi’an Jiaotong University, Xi'an, China
Duration: 21 Oct 201924 Oct 2019
http://www.apap2019.org/callforpaper.html

Conference

Conference8th International Conference on Advanced Power System Automation and Protection
Abbreviated titleAPAP2019
CountryChina
CityXi'an
Period21/10/1924/10/19
Internet address

Fingerprint

Electric power system measurement
Frequency stability
Analytical models
Simulators

Keywords

  • power imbalance
  • frequency disturbance events
  • power system monitoring
  • inertia emulation

Cite this

Hong, Q., Booth, C., Wang, B., Dong, X., & Ji, L. (2019). Estimation of power imbalance size with consideration of impact of emulated inertia. Paper presented at 8th International Conference on Advanced Power System Automation and Protection, Xi'an, China.
Hong, Qiteng ; Booth, Campbell ; Wang, Bin ; Dong, Xinzhou ; Ji, Liang. / Estimation of power imbalance size with consideration of impact of emulated inertia. Paper presented at 8th International Conference on Advanced Power System Automation and Protection, Xi'an, China.5 p.
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author = "Qiteng Hong and Campbell Booth and Bin Wang and Xinzhou Dong and Liang Ji",
note = "{\circledC} 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.; 8th International Conference on Advanced Power System Automation and Protection, APAP2019 ; Conference date: 21-10-2019 Through 24-10-2019",
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Hong, Q, Booth, C, Wang, B, Dong, X & Ji, L 2019, 'Estimation of power imbalance size with consideration of impact of emulated inertia' Paper presented at 8th International Conference on Advanced Power System Automation and Protection, Xi'an, China, 21/10/19 - 24/10/19, .

Estimation of power imbalance size with consideration of impact of emulated inertia. / Hong, Qiteng; Booth, Campbell; Wang, Bin; Dong, Xinzhou ; Ji, Liang.

2019. Paper presented at 8th International Conference on Advanced Power System Automation and Protection, Xi'an, China.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Estimation of power imbalance size with consideration of impact of emulated inertia

AU - Hong, Qiteng

AU - Booth, Campbell

AU - Wang, Bin

AU - Dong, Xinzhou

AU - Ji, Liang

N1 - © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

PY - 2019/10/21

Y1 - 2019/10/21

N2 - Accurate estimation of power imbalance (e.g. loss of generation size) during frequency disturbance events is of vital importance for effective power system monitoring and control. Conventional methods for power imbalance estimation are mainly based on the swing equation, where the size of power imbalance is calculated using the measured Rate of Change of Frequency (RoCoF) and the inertia level of the system. With the increasing penetration of renewable generation, the system inertia has decreased significantly. Inertia emulation is considered as a promising solution for enhancing frequency stability in future power systems. However, the emulated inertia, acting in a similar manner of true inertia, could have an impact on the measured RoCoF, which will subsequently affect the accuracy of the power imbalance estimation using conventional methods. Therefore, this paper presents a comprehensive evaluation of the impact of such emulated inertial response on the RoCoF behaviour during frequency disturbances, thus the impact on the accuracy of power imbalance estimation. A new power imbalance estimation method that takes into account of the impact of emulated inertia is proposed. Case studies using both an analytical model and a microgrid model simulated in a real-time simulator are presented, which demonstrate that the proposed power imbalance estimation method could achieve significantly higher estimation accuracy compared to conventional methods, thus offering an effective solution for estimating frequency disturbance sizes in systems with emulated inertia.

AB - Accurate estimation of power imbalance (e.g. loss of generation size) during frequency disturbance events is of vital importance for effective power system monitoring and control. Conventional methods for power imbalance estimation are mainly based on the swing equation, where the size of power imbalance is calculated using the measured Rate of Change of Frequency (RoCoF) and the inertia level of the system. With the increasing penetration of renewable generation, the system inertia has decreased significantly. Inertia emulation is considered as a promising solution for enhancing frequency stability in future power systems. However, the emulated inertia, acting in a similar manner of true inertia, could have an impact on the measured RoCoF, which will subsequently affect the accuracy of the power imbalance estimation using conventional methods. Therefore, this paper presents a comprehensive evaluation of the impact of such emulated inertial response on the RoCoF behaviour during frequency disturbances, thus the impact on the accuracy of power imbalance estimation. A new power imbalance estimation method that takes into account of the impact of emulated inertia is proposed. Case studies using both an analytical model and a microgrid model simulated in a real-time simulator are presented, which demonstrate that the proposed power imbalance estimation method could achieve significantly higher estimation accuracy compared to conventional methods, thus offering an effective solution for estimating frequency disturbance sizes in systems with emulated inertia.

KW - power imbalance

KW - frequency disturbance events

KW - power system monitoring

KW - inertia emulation

M3 - Paper

ER -

Hong Q, Booth C, Wang B, Dong X, Ji L. Estimation of power imbalance size with consideration of impact of emulated inertia. 2019. Paper presented at 8th International Conference on Advanced Power System Automation and Protection, Xi'an, China.