Hierarchical Cooperative Control Study of Multi-Storage Converters

doi:10.3969/j.issn.1008-0198.2024.02.008

Abstract

Abstract: The output voltage and frequency of energy storage inverters in microgrids are unstable and the active and reactive power are unbalanced under islanded operation.The traditional droop control of inverters cannot adjust the voltage and frequency of microgrid islanded operation without static error,and can not meet the active and reactive power balance of microgrid islanded operation. Based on this,a hierarchical collaborative control method for multiple energy storage inverters is proposed.Based on the comprehensive consideration of the operational control objectives of energy storage inverters and the information exchange between adjacent energy storage inverters in microgrids,a hierarchical interconnected distributed collaborative control structure for microgrids is designed,and the distributed control method for multiple systems is improved.The simulation experiments results on multiple energy storage inverters in microgrids show that,the proposed control strategies have the effectiveness and collaborative control ability.

Key words: energy storage converter, islanding operation, hierarchical control, distributed cooperative control

CLC Number:

TM46

WANG Can, DENG Wenhua, ZHANG Kan, CHEN Gang, XIA Xiangyang, SONG Hongtao. Hierarchical Cooperative Control Study of Multi-Storage Converters[J]. Hunan Electric Power, 2024, 44(2): 60-67.

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