A comprehensive power loss, efficiency, reliability and cost calculation of a 1 MW/500 kWh battery based energy storage system for frequency regulation application

Recent works have highlighted the growth of battery energy storage system (BESS) in the electrical system. In the scenario of high penetration level of renewable energy in the distributed generation, BESS plays a key role in the effort to combine a sustainable power supply with a reliable dispatched load. Several power converter topologies can be employed to connect BESS to the grid. There is no defined and standardized solution, especially for medium voltage applications. This work aims to carry out a literature review on the main converter topologies used in BESS and highlight the main advantages and disadvantages of each one. The topologies used for each conversion stage are presented and their combinations are analyzed. In addition, the different services that BESS can carry out when connected to the distribution system are analyzed in order to demonstrate all the main contributions to the electrical systems. Finally, a case study is performed to compare and analyze the converter topologies for BESS, considering some aspects such as efficiency, power quality and number of components.

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“…The three-level neutral-point clamped (NPC) converter is another topology widely used for BESS applications [23][24][25], as shown in Fig. 4.…”

Section: Converter Topologies With Transformersmentioning

confidence: 99%

Power converters for battery energy storage systems connected to medium voltage systems: a comprehensive review

et al. 2019

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“…In most cases, a relatively simple approach is followed where the reliability of the system under study is calculated as the sum of the respective failure rates of the system components, referred to as the 'parts count method' [32]. An example of this approach is the study of power loss, reliability and cost of a 1 MW/500 kWh BESS [33] in which the failure rate of each electrochemical cell is calculated based on the stress imposed on the internal cell resistance using MIL-HDBK-217F [34] and failure rate of the system is calculated as the sum of the local failure rates without considering inbuilt system redundancy. In [27] a methodology is presented for calculating system reliability using Markov-based models.…”

Section: Reliability Analysismentioning

confidence: 99%

A Comparison of Grid-Connected Battery Energy Storage System Designs

Chatzinikolaou

Rogers

2017

IEEE Trans. Power Electron.

100

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This paper presents a method for evaluating gridconnected Battery Energy Storage System (BESS) designs. The steady-state power losses of the grid interface converter, the battery pack and the balancing circuit are calculated. The reliability of each complete system is calculated using a Markovbased modelling approach that takes into account the built-in redundancy of the system as well as performance degradation caused by faults. Finally, a simple economic analysis based on capital cost and efficiency is used to provide a basis for direct comparison between competing system designs. Three design options for a 1 MW, 1 MWh BESS connected at 11 kV are compared: a conventional BESS using parallel low-voltage power blocks, a BESS using a high-voltage intelligent battery pack and a BESS using a cascaded H-bridge converter. The results of the analysis indicate that additional power electronics included in the battery pack as part of the intelligent battery pack and H-bridge designs can enhance the reliability of the BESS by an order of magnitude under typical conditions, without increasing the overall cost of the system.

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“…However, the use of too many solar panels can increase the cost of capital investment and make the power system is unstable due to the uncertainty associated with solar energy [12,13]. In addition, a wide range of studies [14][15][16][17][18][19] found that the use of energy storage systems (ESS) is one of the most effective solutions for quality, reliability and power of SPP and contributes to greater development of efficient energy distribution. Some studies [20,21] showed that the optimal control of ESS in SPP with multiple bus structures that are built using Flexible Alternative Current Transmission Systems (FACTS) and are the Western System Coordinating Council (WSCC) with the uneven impedance distribution will reduce the peak load, the cost of power supply renovation and compensate the negative impact on the environment.…”

Section: Literature Reviewmentioning

confidence: 99%