Analysis and Trajectory Tracking Control of a Modular Multilevel Converter

Fehr, Hendrik; Gensior, Albrecht; Müller, Marcus

doi:10.1109/tpel.2014.2301560

Cited by 24 publications

(6 citation statements)

References 15 publications

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Section: Introductionmentioning

confidence: 99%

“…In addition to proposing a continuous equivalent model [8], a corresponding single-phase circuit and a load model consisting of current sources [9], and a dynamic model with four independent dynamical components of the arm currents with the effect of AC and DC systems [10]. Others include a discrete-time mathematical model with a predictive model [11], a linearised analytical models with droop control [12] for MMCs under balanced conditions, and other literatures that present more dynamic models and respective controllers for assessment of the MMC operation under other operating conditions [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Function‐based modulation control for modular multilevel converters under varying loading and parameters conditions

Mehrasa

Pouresmaeil

Akorede

et al. 2017

IET Generation, Transmission & Distribution

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This paper presents a new function-based modulation control technique for modular multilevel converters (MMC). The main contribution of the study is the formulation of two new modulation functions for the required switching signals of the MMC's upper and lower submodules respectively. The output and circulating current equations of the converter are employed to attain the arm's currents which are utilized for the proposed modulation functions, which have two important features: i) it is much less complex compared to the existing control methods of MMC; and ii) the proposed controller can be regulated properly to deal with parameter variations in a bid to ensure stable and accurate performance. In this controller, the MMC output current magnitude and phase angle required for special active and reactive power sharing can be easily applied to the modulation functions. Also, the equivalent capacitors of upper and lower sub-modules are discussed based on the proposed modulation functions. Finally, simulations are performed in Matlab/Simulink environment to evaluate the performance of the proposed control technique in both the dynamic conditions of load as well as varying parameters.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Function‐based modulation control for modular multilevel converters under varying loading and parameters conditions

Mehrasa

Pouresmaeil

Akorede

et al. 2017

IET Generation, Transmission & Distribution

View full text Add to dashboard Cite

show abstract

“…In [100], researchers analyzed this technique with modular multilevel converters (M2Cs) where they exploited the properties of the converter with the differential flatness of the model of the load. This is done by assuming the subsystem of a load connected to the converter as a current source.…”

Section: 2 3 Trajectory Tracking Controlmentioning

confidence: 99%

Review on Current Control Techniques of Grid Connected PWM-VSI Based Distributed Generation

2019

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Nowadays, new trends in the industry of electricity generation are to enhance the power generation by employing distributed generation (DG) system which is mostly based on renewable generation sources such as wind, solar, etc. However, many power quality problems could arise on existing grid when DG is connected or the operation of distributed energy resources (DER) is not controlled properly. That's why, while integrating DG with the power grid, a seamless attention should be given to power generation and safe running of system. Several methods, having a diverse concept, have been divided into two main sets: linear and nonlinear controllers. The first group comes with PI controller and parameter feedback controller, and control by means of constant frequency with predictive techniques. The second group includes hysteresis current control and on-line optimization for predictive controllers. Additionally, new current control techniques with neural networks and fuzzy based controllers are also discussed. Selected methods associate the arrangement for the sake to demonstrate the described groups of the controller.

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“…It has many advantages over other multilevel inverters such as diode clamp multilevel, flying capacitors and cascaded H bridges. According to References [14][15][16][17], it can be summarized as follows:…”

Section: Introductionmentioning

confidence: 99%

Research on an Auto-Optimized Capacitor Voltage Balancing Control Strategy of MMC SM for Renewable Energy HVDC Transmission System

et al. 2019

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The Modular Multilevel Converter (MMC) is one of the most attractive converter topologies in the High Voltage Direct Current (HVDC) transmission field. The latest widely used sorting method has a low algorithm complexity. It can effectively balance the sub-module (SM) capacitor voltages, but it would cause relatively high switching frequency and power loss. Aiming at the problem that the sub-module (SM) capacitor voltage sorting algorithm has a large switching loss due to the high switching frequency of the device, this paper proposes an auto-optimized capacitor voltage balancing control strategy. Firstly, the topology and operation principle of MMC are analyzed. Secondly, a SM capacitor voltage control method based on the dynamic deviation threshold is proposed. Considering the switch switching state of the SM and the difference between the voltages of each SM, the algorithm can obtain the dynamic deviation valve using the closed-loop control. The method can avoid the unnecessary repeated switching of the Insulated Gate Bipolar Transistor (IGBT) under the premise of ensuring that the capacitance voltages of the SMs are basically the same, which effectively result in reducing the switching frequency of the MMC SM and reducing the switching loss, thereby improving the operating efficiency of the system. Finally aiming at the proposed control strategy, the simulation and experimental verification are carried out which shows that the proposed algorithm can better control the system voltage deviation, reduce the switching loss of the system and improve the stability of the system.

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Analysis and Trajectory Tracking Control of a Modular Multilevel Converter

Cited by 24 publications

References 15 publications

Function‐based modulation control for modular multilevel converters under varying loading and parameters conditions

Function‐based modulation control for modular multilevel converters under varying loading and parameters conditions

Review on Current Control Techniques of Grid Connected PWM-VSI Based Distributed Generation

Research on an Auto-Optimized Capacitor Voltage Balancing Control Strategy of MMC SM for Renewable Energy HVDC Transmission System

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