Fast Frequency Regulation Method Based on Unbalanced Power Index Using Energy Storage System

FAN Haifeng; LIU Wenlong; SU Dawei; YU Jing

doi:10.3969/j.issn.1000-7229.2018.10.013

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Electric Power Construction ›› 2018, Vol. 39 ›› Issue (10) : 106-112. DOI: 10.3969/j.issn.1000-7229.2018.10.013

Fast Frequency Regulation Method Based on Unbalanced Power Index Using Energy Storage System

FAN Haifeng1, LIU Wenlong2, SU Dawei3, YU Jing3

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Abstract

As most variable speed wind power generators scarcely respond to frequency variation actively, large-scale wind power integration brings challenge to the fast frequency regulation of power system. With the advantage of fast response, energy storage system （ESS） can be used to improve dynamic frequency response of power system. A fast frequency regulation method based on unbalanced power index using ESS is proposed in this paper. Firstly, unbalanced power indices in the stages of frequency fall and recovery are defined. Secondly, an adaptive fuzzy logic control strategy is designed to adjust power output of ESS in the stages of frequency fall and recovery according to unbalanced power index and frequency deviation. Finally, compared to proportional differential （PD） control, the proposed method can reduce capacity demand of ESS and be more flexible and adaptable to different operating conditions, which is verified by case studies.

Key words

fast frequency regulation / energy storage system （ESS） / fuzzy logic / unbalanced power index

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FAN Haifeng, LIU Wenlong, SU Dawei, YU Jing. Fast Frequency Regulation Method Based on Unbalanced Power Index Using Energy Storage System[J]. Electric Power Construction. 2018, 39(10): 106-112 https://doi.org/10.3969/j.issn.1000-7229.2018.10.013

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Funding

This work is supported by National Natural Science Funds for Distinguished Young Scholar（No. 51607092） and State Grid Corporation of China Research Program（No. J2017046）.