Mission-Profile-Based Testing Scheme for Sub-Modules in Modular Multilevel Converter

Yang, Yi; Wang, Weiyao; Ma, Ke

doi:10.1541/ieejjia.9.219

Cited by 13 publications

(4 citation statements)

References 4 publications

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“…An array of random integer in [1,1000] is used to verify the rapidity of the improved quick sort algorithm compared to the bubble sort algorithm, the quick sort algorithm, the bidirectional bubble method, the improved merge sort algorithm, 23 and the running time of each sort algorithm by using the timing function are obtained in Figure 8.…”

Section: Execution Time Comparison Of Sort Algorithmsmentioning

confidence: 99%

“…In recent years, Modular Multilevel Converter (MMC) has been widely used in the field of medium and high voltage due to its advantages of modular design, good output waveform quality, low switching frequency and strong fault handling capability. 1 MMC mainly adopts Nearest Level Modulation (NLM) technology, which greatly reduces its switching loss. At the same time the modular design of MMC makes it good expandability and greatly reduces the manufacturing difficulty.…”

Section: Introductionmentioning

confidence: 99%

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A enhanced control strategy for capacitance voltage equalization in modular multilevel converter

Ding,

Zhang,

Cheng

et al. 2023

Measurement and Control

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In searching for the optimal control strategy of sub-module capacitance voltage equalization of Modular Multilevel Converter (MMC), the most important issue is how to address the significant increase in computing time of the controller, switching frequency of the sub-module, device switching loss and MMC fault rate led by the increase in the number of sub-modules of the upper/lower bridge arm of the MMC. Therefore, this paper proposes a control strategy based on the retaining factor method + improved quick sort, namely, an improved quick sort algorithm is used to sort the sub-module capacitance voltages to reduce the amount of computation of the MMC controller; at the same time, a retaining factor is introduced to participate in the improved quick sort to significantly reduce the switching frequency of the sub-module. MMC of large ship grid-connected photovoltaic power system is taken as a research object in this paper, a 31-level MMC model is built in Matlab/Simulink. Simulation results verify that the improved quick sort has a good rapidity compared to the algorithms of bubble sort, quick sort, bidirectional bubble sort, and improved merge sort, that the retention factor method has a good frequency reduction effect, and that the proposed retention factor + improved quick sort can provide a good performance compared to improved quick sort and retention factor + improved merge sort under conditions of the normal operation and introducing disturbance.

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Section: Execution Time Comparison Of Sort Algorithmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A enhanced control strategy for capacitance voltage equalization in modular multilevel converter

Ding,

Zhang,

Cheng

et al. 2023

Measurement and Control

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show abstract

“…This is especially important when the BESS application is taken into account. Therefore, mission profile emulators (MPE) play an important role in the simulation of SM, since the MPE can emulate similar voltage and current profiles [17], [18], with the advantage of a significant reduction of components for implementation [19], [20], [21].…”

Section: Introductionmentioning

confidence: 99%

“…Reference [14] proposes a model-assisted SM test scheme for evaluating the MMC operation in HVDC, STATCOM, among others applications with a full-bridge converter. Reference [22] employs a full-bridge converter to emulate the arm current profile with a circulating current suppression method. In this study, a circulating current suppression method is proposed and evaluated in the emulator operation of inverting and rectifying mode.…”

Section: Introductionmentioning

confidence: 99%

Mission Profile Emulator for MMC-based Battery Energy Storage Systems

Amorim¹,

França²,

Cupertino³

et al. 2022

Eletrônica de Potência

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In recent years, Modular Multilevel Converters (MMC) have been widely used in medium/high voltage applications, such as high-voltage direct current (HVDC) systems, and pointed out as a promising solution for battery energy storage systems (BESS) and static synchronous compensators (STATCOM), according to recent research. Especially, in BESS application, the current and voltage conditions in the battery bank are fundamental to evaluate thermal dynamic, reliability, and lifetime. However, depending on the voltage and power levels, MMC is based on hundreds of SMs. Thus, the full MMC system implementation can be costly and complex for operational and reliability tests. In this sense, the so-called mission profile emulators (MPE), have been developed to emulate the voltage and current in an SM and batteries. The MPE eliminates the need to implement the full converter and contributes to more agile tests of the MMC dynamics, resulting in the design of more reliable converters. In addition, the MPE can be used to obtain battery current and arm current spectrum similar to those obtained in MMC. This work presents a detailed design and implementation of the MPE for an MMC-based BESS. The MPE is validated in simulations and in a reduced-scale prototype.

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Hybrid Modulation Method for Nearest-Level-Control-Based MMC to Suppress DC Power Fluctuation When Enabling Circulating Current Suppression

Xin

et al. 2020

2020 IEEE Energy Conversion Congress and Exposition (ECCE)

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Mission-Profile-Based Testing Scheme for Sub-Modules in Modular Multilevel Converter

Cited by 13 publications

References 4 publications

A enhanced control strategy for capacitance voltage equalization in modular multilevel converter

A enhanced control strategy for capacitance voltage equalization in modular multilevel converter

Mission Profile Emulator for MMC-based Battery Energy Storage Systems

Hybrid Modulation Method for Nearest-Level-Control-Based MMC to Suppress DC Power Fluctuation When Enabling Circulating Current Suppression

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