Optimization of battery bank sizing for energy storage system and impacts during active filter operation mode

• Autor(a) principal: Rodrigo Cassio de Barros
• Data de Publicação: 2022
• Tipo de documento: Tese
• Idioma: eng
• Título da fonte: Repositório Institucional da UFMG
• Texto Completo: http://hdl.handle.net/1843/48324
• topic: Battery energy storage system; Battery selection; MCDM; Harmonic current compensation; BESS lifetime evaluation; Engenharia elétrica; Energia - Armazenamento; Baterias elétricas; Harmônicos (Ondas elétricas)

Due to the intermittent behavior during the energy generation by renewable energy (such as Photovoltaic (PV) and wind power generation), the Battery Energy Storage System (BESS) has been presented as an interesting application in the electrical power system. The BESS can be used for several operation, such as peak shaving, frequency regulation and power smoothing. In addition, the BESS can provide ancillary services, such as Harmonic Current Compensation (HCC) and reactive power injection. The choice of the battery employed in the BESS is not a straightforward task, since there are several criteria which should be taken into account. Thus, this work proposes a methodology to support the battery selection process. Six criteria are considered: system dc-link voltage, battery lifetime, battery bank volume, battery bank power losses, battery bank price and storage capacity index. The Multiple Criteria Decision Making (MCDM) is used to choose the best battery based on the relative importance between the Operational Expenditure (OPEX) and Capital Expenditure (CAPEX) concepts. The methodology proposed in this work is applied to 27 batteries composed by lead-acid and Li-ion (Lithium - ion) batteries aiming to select the best solution for a photovoltaic system based on the peak shaving operation mode. In this work, the BESS working with peak shaving and HCC operation are explored. Thus, the lifetime evaluation of the dc/ac stage of the BESS is analyzed based on a mission profile operation. In this context, the lifetime evaluation of the semiconductor devices and the dc-link capacitors are performed. The BESS dc/ac stage lifetime working only with peak shaving operation is considered the base case and it is compared to the lifetime consumption when the BESS compensates 5th and 7th harmonic current components. As results, it is observed an increasing in the lifetime consumption in the analyzed components due to HCC process. In addition, experiment results of the proposed system (BESS with HCC operation) is presented in this work. The bench test with the main components are described and results of conditioning, control and thermal are presented.