Sensorless vector control scheme for an induction motor fed by MMC

Khosravi, Mahyar; Khaburi, Davood Arab

doi:10.1080/00207217.2022.2068670

Cited by 4 publications

(5 citation statements)

References 21 publications

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“…On the other hand, the reference speed reversal test has been also conducted and the corresponding results are presented. Moreover, in order to compare the performance of the proposed strategy with a well‐known traditional method that is used for controlling the MMC‐fed induction motors, the vector control scheme with circulating current control strategy [31] is also experimentally implemented and the steady‐state and dynamic responses of this technique are also provided in the paper. Finally, the execution times for one iteration of the conventional and the proposed PTC methods are determined and compared.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, it is not possible to compare the performance of the developed strategy with a similar previously proposed predictive method. However, in order to compare different aspects of the proposed method with a well‐known traditional control strategy that is used for MMC‐based drives, the vector control scheme with circulating current control capability [31] has been also experimentally implemented on the MMC setup. The same dynamic and steady‐state tests are conducted once more for the vector controller; and the corresponding results and indexes are presented in Figures 16–20 and Tables 7 and 8.…”

Section: Resultsmentioning

confidence: 99%

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Two‐stage deadbeat‐based predictive torque control strategy for modular multilevel converter‐fed three‐phase induction motors

Khosravi,

Arab Khaburi,

Alikhani

et al. 2023

IET Electric Power Appl

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Recently, Modular Multilevel Converters (MMC) are considered to be extensively used in medium‐voltage AC drives A two‐stage deadbeat‐based strategy is developed by the authors to make the implementation of Predictive Torque Control (PTC) technique for an induction motor that is fed by a three‐phase MMC possible . Despite various benefits of PTC strategy, it has not been widely employed for multilevel topologies due to the huge number of switching states of these converters, and the complex internal dynamics of topologies such as MMC. The proposed control scheme results in significant reduction of the computational burden, using an initial reference voltage that is determined at the first stage of the strategy by the deadbeat technique. Next, the predictive evaluation process is conducted at the second stage to simultaneously control the stator flux, electromagnetic torque and circulating current. The number of admissible vectors that should be evaluated in the cost function is effectively limited by only considering some adjacent vectors of the reference voltage in the first stage. Moreover, the circulating current control capability, which is necessary for effective operation of MMC, is also considered in the developed scheme. Finally, the satisfactory performance of the proposed strategy is validated through various experimental tests.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Two‐stage deadbeat‐based predictive torque control strategy for modular multilevel converter‐fed three‐phase induction motors

Khosravi,

Arab Khaburi,

Alikhani

et al. 2023

IET Electric Power Appl

Self Cite

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“…However, their other important features are evaluated and compared, such as estimation error inherent control, circulating current suppression, usage of force algorithm, and open-circuit fault detection in the arms. Table 4 shows that in other works, 12,13,19,20,31,32,38 all voltage sensors are installed in the arms, even though some eliminate current sensors, and others apply circulating current suppression methods. Furthermore, in experimental work, their switching frequency ranges from 2 to 20 kHz.…”

Section: Different Methods Comparisonmentioning

confidence: 99%

“…One of the many applications where MMC is often employed is induction motor control, and a variety of methods, such as sensorless vector control schemes, have been used in combination with MMC to control the motor. [29][30][31][32] Although these studies assist in controlling the motors with fewer sensors, they need many voltage and current sensors to control the MMC. The other method described in Parida and Das 33 replaces one of the MMC's arm Subs with large LC filters.…”

Section: Introductionmentioning

confidence: 99%

“…However, despite using a current sensor per arm, each processing cycle employs the current derivative formula rather than many voltage sensors in the algorithm, which amplifies sensor noise and reduces computational accuracy. One of the many applications where MMC is often employed is induction motor control, and a variety of methods, such as sensorless vector control schemes, have been used in combination with MMC to control the motor 29–32 . Although these studies assist in controlling the motors with fewer sensors, they need many voltage and current sensors to control the MMC.…”

Section: Introductionmentioning

confidence: 99%

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An improved method to sub‐module voltage balancing in modular multilevel converters with two voltage sensors

Hashkavayi

Barakati

Torabi

et al. 2023

Circuit Theory & Apps

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Summary The modular multilevel converter (MMC) is an innovative structure that has expanded the usage of multilevel converters (MLCs) in the electrical industry. Since the MMC initially required a large number of sensors to manage the capacitor voltages, various studies have been done to reduce their number to improve the converter's reliability and reduce construction costs. In this paper's proposed method, merely two voltage sensors are used to balance the converter's capacitor voltages, and voltages are estimated using the exponentially weighted recursive least square (RLS) method in each sampling time. Also, the estimated voltages are sorted according to the capacitor current sign determined by the voltage sensors, and the current sensors are entirely eliminated. Furthermore, three cases for compensating the capacitor estimated voltages are presented, and the last case proposes the sub‐module force algorithm (SFA) for system protection. The efficacy of the proposed method has been assessed via simulation and experimental implementations.

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