Evaluation of Emerging Modular Multilevel Converters for BESS Applications

Soong, Theodore; Lehn, Peter W.

doi:10.1109/tpwrd.2014.2341181

Cited by 136 publications

(66 citation statements)

References 26 publications

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“…The published literature mainly relates to their applications to high-voltage DC (HVDC) transmission [16][17][18], MV electric drives [19][20][21], and STATCOMs [22,23]. MMCs used in BESSs for interfacing low-or medium-voltage batteries to mediumor high-voltage grids were reported in [24][25][26][27]. They enable a flexible scaling of power modules to integrate energy storage and power electronics to a wide range of operating voltages, output power and stored energy.…”

Section: Introductionmentioning

confidence: 99%

Reverse-blocking modular multilevel converter for battery energy storage systems

Yang

Xue

Chen

et al. 2017

J. Mod. Power Syst. Clean Energy

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Energy storage systems with multilevel converters play an important role in modern electric power systems with large-scale renewable energy integration. This paper proposes a reverse-blocking modular multilevel converter for a battery energy storage system (RB-MMC-BESS). Besides integrating distributed low-voltage batteries to medium or high voltage grids, with the inherited advantages of traditional MMCs, the RB-MMC-BESS also provides improved DC fault handling capability. This paper analyzes such a new converter configuration and its operating principles. Control algorithms are developed for AC side power control and the balancing of battery state of charge. The blocking mechanism to manage a DC pole-topole fault analyzed in depth. Comprehensive simulation results validate both the feasibility of the RB-MMC-BESS topology and the effectiveness of the control and fault handling strategies.

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Section: Introductionmentioning

confidence: 99%

Reverse-blocking modular multilevel converter for battery energy storage systems

Yang

Xue

Chen

et al. 2017

J. Mod. Power Syst. Clean Energy

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“…Secondly, the second-life battery cells could be assembled in isolated small modules, and they are integrated with load or into the grid through multi-level or multi-port converter [13,14]. According to [13], the authors proposed a modular boost-multilevel buck based converter topology and a module-based distributed control architecture.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Generic Energy Management Strategy for Controlling Second-Life Battery Systems in Stationary Applications

et al. 2016

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Abstract:Recently, second-life battery systems have received a growing interest as one of the most promising alternatives for decreasing the overall cost of the battery storage systems in stationary applications. The high-cost of batteries represents a prominent barrier for their use in traction and stationary applications. To make second-life batteries economically viable for stationary applications, an effective power-electronics converter should be selected as well. This converter should be supported by an energy management strategy (EMS), which is needed for controlling the power flow among the second-life battery modules based on their available capacity and performance. This article presents the design, analysis and implementation of a generic energy management strategy (GEMS). The proposed GEMS aims to control and distribute the load demand between battery storage systems under different load conditions and disturbances. This manuscript provides the experimental verification of the proposed management strategy. The results have demonstrated that the GEMS can robustly handle any level of performance inequality among the used-battery modules with the aim to integrate different levels (i.e., size, capacity, and chemistry type) of the second-life battery modules at the same time and in the same application.Keywords: second-life batteries; energy storage system (ESS); lithium-ion (Li-ion) batteries; stationary applications; self-consumption of photo-voltaic profile; energy/power management strategy; rule-based control strategy; battery management system (BMS); multi-port power converter

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“…Both of these topologies have attracted research interest over the last couple of years [7]. An evaluation between the two topologies [7][8][9][10][11][12][13][14][15][16][17][18][19] in terms of conversion efficiency shows that MMC-based solutions perform slightly better compared to the CHB counterparts [4].…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Modular Multilevel Converter with Partial Embedded Energy Storage

et al. 2016

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Modular and cascaded multilevel converters provide a functional solution for the integration of energy storage systems (ESSs). This paper develops a hybrid multilevel converter based on the modular multilevel converter (MMC) that can be functionally extended with partial embedded ESS as a fraction of the overall converter power rating. The configuration, which can operate as a typical DC-AC converter, enables multi-directional power flow between the DC-and AC-side of the converter, as well as the embedded energy storage elements. The use of a three-phase flying-capacitor submodule eliminates the second-order harmonic oscillations present in modular cascaded multilevel converters. Current, voltage and power control are discussed in the paper while simulation results illustrate the operation of the hybrid MMC as a DC-AC converter in a typical inverter application and the additional functions and control of the embedded ESS.

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Evaluation of Emerging Modular Multilevel Converters for BESS Applications

Cited by 136 publications

References 26 publications

Reverse-blocking modular multilevel converter for battery energy storage systems

Reverse-blocking modular multilevel converter for battery energy storage systems

Design and Analysis of Generic Energy Management Strategy for Controlling Second-Life Battery Systems in Stationary Applications

A Hybrid Modular Multilevel Converter with Partial Embedded Energy Storage

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