Modeling the Impact of Modified Inertia Coefficient (H) due to ESS in Power System Frequency Response Analysis

Energies

Muhammad Ahmad¹  Muhammad Irfan²  Chul-Hwan Kim³  Muhammad Saeed Uz Zaman³  Manuel Mazzara⁴ 

[1] Department of Computer Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan;Department of Electrical Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan;Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea;Institute of Software Development and Engineering, Innopolis University, Innopolis 420500, Russia;

关键词: energy storage system;    frequency profile;    load frequency control;    virtual inertia;    virtual synchronous machine;   

DOI  :  10.3390/en13040902

来源: DOAJ

【 摘 要 】

The advantages of increased penetration of distributed generation are also accompanied by several challenges, low inertia being one of them, which threatens the grid stability. An emerging approach to confront this problem is the introduction of so-called virtual inertia (VI) provided by energy storage systems (ESS). In contrast to the already available literature which considers a conventional load frequency control (LFC) model, this work concentrates on a modified LFC model as the integration of a large portion of ESS changes the inertia constant ( $H$ ) of a power system. A sensitivity function is derived that shows the effects of changes in $H$ on the power system’s frequency response. With the help of the developed mathematical model and simulation results, it is shown that a difference in the actual and calculated values of $H$ can deteriorate the system performance and economy. As one of the reasons for this difference is improper modeling of ESS in the LFC model, therefore, the study signifies the accurate calculation of $H$ in the power systems having enlarged penetration of ESS.

【 授权许可】

Unknown