Capacity Configuration of Inter-Linking Converters in AC/DC Hybrid Micro-grid Considering Energy Storage Scheduling

doi:10.3969/j.issn.1000-7229.2019.10.010

Abstract

Abstract: Inter-linking converter is the key equipment for power exchange between AC and DC sides in AC/DC hybrid micro-grid. It can coordinate the power distribution between AC and DC sides and improve the power quality of the system. In the design stage of the micro-grid， determining the configuration capacity of inter-linking converter is the key step of engineering construction. Aiming at the state of distributed power generation， energy storage and load on both sides of AC and DC at the sampling time， the power flow of inter-linking converters is analyzed on the basis of flexible scheduling of energy storage on both sides， and the theoretical transmission power constraints of inter-linking converters at sampling time are obtained. The dual-objective capacity allocation model of inter-linking converters in AC/DC hybrid micro-grid is established from two aspects of economy and voltage deviation. The optimal capacity of inter-linking converters is obtained by using multi-objective particle swarm optimization algorithm. Finally， the validity of the proposed model and solution method is verified in a simulation example.

Key words: AC / DC hybrid microgrid, interlinked converters, energy storage dispatching, capacity configuration

CLC Number:

TM 46

ZHU Yongqiang， LIU Kang， ZHANG Quan， TIAN Yuan， CAI Bingqian， XIA Ruihua. Capacity Configuration of Inter-Linking Converters in AC/DC Hybrid Micro-grid Considering Energy Storage Scheduling[J]. Electric Power Construction, 2019, 40(10): 84-93.

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