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| Battery Energy Storage Control Strategy in Secondary Frequency Regulation Considering Its Action Moment and Depth |
| Li Xinran1, Huang Jiyuan2, Chen Yuanyang3, Li Shujuan1, Ouyang Lulu2 |
1. College of Electrical and Information Engineering Hunan University Changsha 410082 China;
2. Grid Hunan Electric Power Corporation Changsha Power Supply Company Changsha 410015 China;
3. State Grid Hunan Electric Power Corporation Changsha 410007 China |
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Abstract A control strategy of battery energy storage system (BESS) is proposed for secondary frequency regulation (SFR). This strategy integrates the advantages of the area control error (ACE) and traditional area regulation requirement (ARR) signal distribution modes. Regarding the two signal distribution modes, the frequency characteristics of regional grids involving BESS are analyzed in complex frequency domain by the sensitivity theory. Thereafter a method to determine the action moments and control modes of BESS is presented. Taken into account the energy limitation of BESS and the ramping constraints of conventional generators in the time domain, a method to determine the action depth of BESS is put forward based on the dynamic available AGC (DAA) indices. Finally, the control strategy of BESS considering its action moments and depth is proposed, and the corresponding implementation process is given. The simulations of step disturbance case from an actual power system are carried out. The results show that the proposed strategy can largely improve the performance of frequency regulation and BESS operation, and can take advantages.
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Received: 19 December 2015
Published: 30 June 2017
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2017, Vol. 32 
