An Improved Submodule Capacitor Voltage Measuring Algorithm for MMC With Reduced Sensors

He, Ruizhi; Liu, Dong; Teodorescu, Remus; Zhang, Qi; Hou, Weiyang; Chen, Zhe

doi:10.1109/jsen.2021.3095721

Cited by 7 publications

(3 citation statements)

References 24 publications

(64 reference statements)

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“…The divide-and-conquer method is used to optimize the algorithm and reduce the number of comparisons required by the algorithm in the process of sorting operation [3,5,7].…”

Section: Improved Quicksort Pressure Balancing Optimization Strategymentioning

confidence: 99%

Optimized Voltage Equalization Algorithm for Modular Multilevel Converters

2023

J. Phys.: Conf. Ser.

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The switching frequency of modular multilevel converters increases with the number of bridge arm submodules. Therefore, an improved voltage equalization technology based on fast sorting algorithm is proposed, which introduces the maximum voltage deviation between sub-modules and reduces the unnecessary switching operations caused by small changes in the capacitor voltage of factor modules. With the help of Matlab/Simulink, a modular multilevel converter with optimized control was simulated to verify the downscaling effect of the voltage-sharing optimization method.

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“…The divide-and-conquer method is used to optimize the algorithm and reduce the number of comparisons required by the algorithm in the process of sorting operation [3,5,7].…”

Section: Improved Quicksort Pressure Balancing Optimization Strategymentioning

confidence: 99%

Optimized Voltage Equalization Algorithm for Modular Multilevel Converters

2023

J. Phys.: Conf. Ser.

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“…Compares the investigative uses of over-modulation techniques in modular multilevel cascaded converters for harmonic elimination in three-phase two-level voltage source inverters [15], [16]. A modular multilevel converter with a simplified nearest-level control (NLC) strategy was proposed for voltage balancing [17]. Describes the evaluation and control perceptions of a VSM-based multilevel PV-STATCOM for a distributed energy system for harmonic reduction [18].…”

Section: Introductionmentioning

confidence: 99%

Pulse charging based intelligent battery management system for electric vehicle

Kadlag

Tapre²,

Mapari

et al. 2023

Bulletin EEI

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Electric vehicles (EVs) are now an important part of the automotive industry for two main reasons: decreased reliance on oil and reduced air pollution, which helps us contribute to the development of an environmentally friendly environment. EV buyers examine overall vehicle mileage, recharge time, vehicle mileage after every charge, batteries charging/discharging security, lifespan, charged rate, capability, and temperature increase. A new improved pulse charging technique is proposed, in which the battery is charged using proportional integral derivative (PID) control action and a neural network. A PID controller is used to develop the charging unit in this design. The feed forward neural network was used to determine the values of the PID control parameters. The battery management system (BMS) ensures that this designed battery charging system takes less time to charge the battery efficiently. The system is built with MATLAB/Simulink.

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“…The key problem with MMC is that the structure of multiple submodules in series leads to the need for numbers of sensors in the control, increasing the amount of information to be collected [8] . In order to solve this problem, most of the existing solutions have been studied from the point of view of reducing the voltage and current sensors.…”

Section: Introductionmentioning

confidence: 99%

An MMC control strategy without bridge arm current sensors

Chen,

Zhao,

Zhang

et al. 2023

J. Phys.: Conf. Ser.

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Each bridge arm of a modular multilevel converter (MMC) is connected in series with multiple submodules. This structure increases the amount of current detection, making it necessary to have a number of current sensors in operation, which increases the system cost. For this reason, this paper proposes an MMC control strategy that does not require bridge arm current sensors. Firstly, the nearest level modulation (NLM) strategy requires the bridge arm current to be used to determine the submodule entry direction. In this case, this article proposes a method for determining the input direction of the submodule based on the capacitive voltage of the submodule, which calculates the input method of the submodule by analyzing the state quantities in the bridge arm voltage switching function, omitting the bridge arm current sensor and reducing the cost. Secondly, the traditional MMC circulation suppression method needs to detect the bridge arm current to calculate the circulation. However, this paper proposes an indirect circulation suppression method by suppressing the unbalanced voltage based on the analysis of the circulation generation mechanism. Finally, simulations and experiments validate the effectiveness of this method and lay the foundation for the next engineering application.

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An Improved Submodule Capacitor Voltage Measuring Algorithm for MMC With Reduced Sensors

Cited by 7 publications

References 24 publications

Optimized Voltage Equalization Algorithm for Modular Multilevel Converters

Optimized Voltage Equalization Algorithm for Modular Multilevel Converters

Pulse charging based intelligent battery management system for electric vehicle

An MMC control strategy without bridge arm current sensors

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