Circulating Current control of a Modular Multilevel Converter (MMC) with State Feedback Controller and Harmonic Current Suppression

Abdu, Lawan; Almurib, Haider A. F.; Khor, J.G.; Babani, Sulaiman

doi:10.1109/esars-itec.2018.8607268

Cited by 4 publications

(4 citation statements)

References 23 publications

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“…) are the function of the measured average capacitor voltage. Since the measured capacitor voltages are obtained mostly using LPF or moving average filters (MAF) [34][35][36][37] the virtual capacitor current cvir i could be generated from the measured voltage variation shown in Figure 9, with minimal noise without the use of any additional filter, and given by:…”

Section: Lvir I This Is Possible As Both Currents ( Cvir I and Lvir Imentioning

confidence: 99%

Modular multilevel converter (MMC) based STATCOM with vector control and virtual impedance voltage compensations

Abdu¹,

Almurib²,

Khor³

2019

IJPEDS

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This paper presents modular multilevel converter (MMC) with circulating current control which provides an improved balanced capacitors voltages. The control is achieved by employing compensation techniques in the external and internal controls of the MMC based static compensator (STATCOM). Performance variations arise during STATCOM non-ideal operation with grid externally and during capacitors voltage transients due to charging and discharging within the MMC that result in the emergence of a voltage disturbance. The proportional integral (PI) controller is usually employed in the external and internal controls for a fast response and reactive current control. In this paper, the performance of the PI controller is improved using voltage compensation in the external control and virtual impedance in the capacitor voltage control within a five-level MMC. The proposed control minimizes the variations in the STATCOM operations with the grid and within the MMC to provide an enhanced overall system response.

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Section: Lvir I This Is Possible As Both Currents ( Cvir I and Lvir Imentioning

confidence: 99%

Modular multilevel converter (MMC) based STATCOM with vector control and virtual impedance voltage compensations

Abdu¹,

Almurib²,

Khor³

2019

IJPEDS

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“…In MMC voltage source inverters, the switching frequency is crucial and restricts how quick the VSI can respond to changes from one operating condition to another, therefore the optimal and achievable inner current control band which is also restricted by the employed switching frequency. That is, the controller bandwidth shows how accurate and fast a control signal could change in time, hence how accurate and fast the MMC system response could be [38]. The MMC based inverter based on the cascade control has the current vector control as the inner current control (ICC), and the outer control that comprises the active and reactive power control.…”

Section: Introductionmentioning

confidence: 99%

“…The PID and hysteresis are the most common [38]. The hysteresis current control is the fastest control in terms of dynamic response however gives more distortions due to the low order harmonics, variable switching frequency and effect of dead time [37][38]. In the other word, PI-current controllers have maintained switching frequency but that at the expense of a slower response.…”

Section: Introductionmentioning

confidence: 99%

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Power compensation for vector-based current control of a modular multilevel converter (MMC) based STATCOM

Abdu

Babani

Abdulkarim

et al. 2019

IJPEDS

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<p>This paper studies the suitability of a vector based current control which is mostly employed for its faster response in the reactive current applications of static compnesators (STATCOMs). The current control is mostly achieved using proportional-integral (PI) controllers because of the advantage of their good tracking and small variations. However, due to the dependency of PI controllers on the modular multilevel converter (MMC) system dynamics, performance variations arise during steady-state STATCOM non-ideal operations. This paper presents an improved MMC based STATCOM control with a d-q compensation algorithm added to the vector based current control. The algorithm is derived to tackle the effects of the dynamics of the MMC and the STATCOM ideal variations without the use of any additional controller. The control is achieved by providing a power compensation in the d,q-axis which injects currents at the input of the PI controllers in order to improve the steady-state performance of the STATCOM control.</p>

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Modular Multilevel Converter-Based Microgrid: A Critical Review

et al. 2023

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Circulating Current control of a Modular Multilevel Converter (MMC) with State Feedback Controller and Harmonic Current Suppression

Cited by 4 publications

References 23 publications

Modular multilevel converter (MMC) based STATCOM with vector control and virtual impedance voltage compensations

Modular multilevel converter (MMC) based STATCOM with vector control and virtual impedance voltage compensations

Power compensation for vector-based current control of a modular multilevel converter (MMC) based STATCOM

Modular Multilevel Converter-Based Microgrid: A Critical Review

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