Mohammad Rezanejad

University of Mazandaran | UMZ

Integrating Power Electronics Converters (PECs)‐based renewable energy sources can establish a weak grid due to the substantial inertia reduction leading to severe frequency fluctuations. In this paper, a control strategy based on the Virtual Synchronous Generator (VSG) concept is designed for a three‐phase Modular Multilevel Converter (MMC) connec...

This paper presents a power management strategy to control a multiport converter as an interface among a three‐phase power grid, a renewable energy source (RES), and two energy storage resources (ESRs). The ESRs include electric energy storage (EES) and electric vehicle (EV). With the expansion of the use of EVs, batteries from EVs can be used as e...

In this paper, a novel high step‐up direct current (DC)‐DC converter, using switched‐capacitor (SC) cells, is proposed. Upon turning a set of switches in this converter on/off, the capacitors are connected to each other in a circuit configuration, and charged through the source. Then, the capacitors are reconnected in a different configuration by t...

Recently, the demand for switched‐capacitor converters has increased due to the use of a low voltage input source. This article aims to improve some weak points of these inverters, such as the high number of elements by presenting a novel single‐source high step‐up multi‐level inverter topology. The proposed inverter consists of a switched‐capacito...

Common-mode current is one of the major challenges in transformerless grid-connected photovoltaic (PV) inverters. This current is affected when the PV arrays are exposed to different environmental conditions and its value increases. This paper attempts to investigate the effect of mismatched condition on voltage balance of PV arrays, which leads to...

This paper proposes a novel single-source high step-up asymmetrical multi-level inverter (MLI) topology based on Marx generator configuration with voltage multiplying capability. The operation principles of the proposed converter which is named Marxiplier are completely different with the presented MLIs in the literatures. Proposed converter uses a...

This paper presents a control strategy based on the input–output feedback linearization (IOFL) theory and a new control inputs-based Lyapunov function to reach the control aims for a back-to-back MMC structure in HVDC transmission applications. The initial schemes of proposed control inputs are firstly obtained by the use of proposed IOFL applied t...

This paper aims to present a novel switched-capacitor multi-level inverter. The presented structure generates a staircase near sinusoidal AC voltage by using a single DC source and a few capacitors to step-up the input voltage. The nearest level control (NLC) strategy is used to control the operation of the converter. These switching states are des...

This paper presents a novel high step-up Multi-Level Inverter (MLI) with a single DC source based on switched-capacitor modules in which it is suitable for the renewable energy applications with low voltage DC source. The proposed topology has the ability of the voltage self-balancing for the capacitors without any external or closed-loop circuits....

Maintaining the proper performance of inverters in various applications is crucial for preventing the detrimental consequences of systems' failure. This paper investigates the fault tolerance of a switched capacitor multilevel inverter (SCMLI), which has redundant switching states for each output voltage level, in both open-circuit and short circui...

Dielectric barrier discharge plasma actuators have attracted a lot of attention to use as new technologies for active flow control. In this paper, an experimental investigation of a single unsteady plasma actuator driven by two simultaneous sinusoidal high voltages is carried out. The aerodynamic performance of this plasma actuator is investigated...

This paper proposes a new control strategy for enforcing a AC‐DC hybrid microgrid to attain stable responses in both steady state and dynamic operating conditions. The proposed controller is designed based on combining direct Lyapunov method and small signal linearization (SSL). The dynamic parts of converter control functions are achieved through...

This paper presented a new structure for the grid-connected multi-level inverters (MLI) circuit with the ability of the cascaded connection. The proposed inverter is capable of transformer-less connection of distributed generation resources to the network. The control system manages the power injection to the grid by minimizing the output current h...

Multilevel inverters (MLIs) are being used in wide range of power electronics applications. These converters that are attracted a lot of attentions during recent years have different topologies with similar basic concept. This paper presents five main submodules (SMs) that are used as the basic structures of MLIs. The paper reviews the common multi...

This paper presents a transformerless step-up multilevel inverter based on a switched-capacitor structure. One of the main contributions of the proposed topology is replacing the separated DC voltage source with capacitors which are charged at predetermined time intervals. Therefore, a high-level staircase voltage waveform can be achieved by discha...

This paper proposes an improved passivity-based control (PBC) technique to provide accurate coordination between AC and DC sides of a grid-tied AC/DC hybrid microgrid. The proposed PBC is based on the passive properties of the system and the energy exchange between the subsystems. To this end, three mathematical formulations for the converters are...

In this paper, a modular topology is presented for generating high-voltage pulsed power. The proposed structure consists of Marx-type modules, which are based on the switched-capacitor (SC) concept. This module receives an input voltage and, depending on the requirement of the user, produces an output voltage either equal to the input or twice as m...

The paper presents a new transformer-less step-up multilevel inverter structure with a single DC source. The concept was based on cascaded connection of bipolar T-type 5-level modules. Proper charging and discharging of capacitors across the load in prearranged time durations would make a nearly sinusoidal staircase voltage. The output voltage ampl...

This paper concentrates on the issues with the aim of providing a constant dc‐link voltage and desired power sharing for a distributed energy storage system (DESS)‐based hybrid microgrid under load variations. The hybrid microgrid which is consisted of PV system, lithium battery‐based storage system and a grid‐connected dc/ac converter are controll...

This paper introduces a new structure for single-phase Active Power Harmonics Filter (APHF) with the simple and low-cost controller to eliminate harmonics and its side effects on low voltage grid. The proposed APHF includes an accurate harmonic detector circuit, amplifier circuit to trap tiny harmonics, switching driver circuit for precise synchron...

This paper proposes a new developed switched-capacitor converter to achieve high voltage pulses with adjustable voltage level and frequency. The proposed topology generates repetitive high voltage pulses by using low voltage power supply with reduced number of components including power semiconductors and capacitor. Therefore, a converter based on...

This study presents a new topology of switched-capacitor (SC) multilevel inverter, which is able to step-up input DC voltage to a multilevel AC waveform. This single source inverter is designed based on series connection of the capacitors that charged by input DC sources through a SC network. The proposed modular inverter uses famous T and cross-co...

This paper presents a switched-capacitor multilevel inverter (SCMLI) combined with multiple asymmetric dc sources. The main advantage of proposed inverter with similar cascaded MLIs is reducing the number of isolated dc sources and replacing them with capacitors. A self-balanced asymmetrical charging pattern is introduced in order to boost the volt...

In this paper, a DC to AC converter with the ability of voltage increasing is presented. This inverter is designed in a way that just one DC source is used. Also, by using power storage technique and with combining charged capacitors and DC source in series form, output voltage levels can be increased. This inverter is in a modular structure and ha...

A droop-Lyapunov based control technique using direct-quadrature (d-q) rotating frame dynamic model is presented in this paper for the frequency and voltage magnitude regulation of a stand-alone single-phase voltage-source inverter (SPVSI). Steady-state and dynamic performance of the controller are analyzed based on the d-q frame model and direct L...

This paper presents a power electronics converter to generate bipolar high-voltage pulses using low-voltage dc source. Converter is designed based on charging of different capacitors by a predetermined switching pattern and their discharging on the load for pulsed power applications. Low number of power electronics devices and bulky transformer eli...

Adapting power-electronic converters which are used in pulsed-power application attract a lot of attention during recent years. In this paper, a modular Bipolar High Voltage Pulse Generator (BHVPG) is proposed based on voltage multipliers and half-bridge converters concept by using power electronics switches. This circuit is capable to generate rep...

A comprehensive dynamic model based on Direct-Quadrature (DQ) rotating frame is proposed in this paper that is used along with a capability curve (CC) based on the active and reactive power to control a grid-connected single-phase voltage-source inverter (SPVSI). With the proposed dynamic model, a droop-passivity based controller can be designed fo...

This paper proposes a new topology of multilevel inverters with asymmetrical commutation cell that consists of three sources and six switches to synthesize asymmetrical output voltage level. This category of topologies is typically used in voltage AC generation. The structure provides multilevel waveform utilizing reduced number of components as co...

This article proposes a new structure of voltage multiplier for portable pulsed power applications. In this configuration, which is based on capacitor-diode voltage multiplier, the capacitors are charged by low AC input voltage and discharge through the load in series during pulse generation mode. The proposed topology is achieved by integrating of...

Utilization of power electronics converters in pulsed power applications introduced a new series of reliable, long life, and cost-effective pulse generators. However, these converters suffer from the limited power ratings of semiconductor switches, which necessitate introduction of a new family of modular topologies. This paper proposes a modular p...

Along with rapid advancement of power semiconductors, voltage multipliers have introduced new series of pulsed power generators. In this paper, based on conventional voltage multiplier and by using power electronics switches a new topology in high voltage pulsed power application is proposed. This topology is a modular circuit that can generate a h...

Matrix Converters (MCs) have many advantages over conventional inverters such as sinusoidal input and output waveforms, operation with close to unity input power factor and more compact size. Direct Torque Control (DTC) is known as one of the popular methods in controlling AC drives. This paper presents Indirect Space Vector Modulation (ISVM) model...

Along with rapid advancement of power semiconductors, voltage multipliers have introduced new series of pulsed power generators. In this paper, current topologies of capacitor-diode voltage multipliers (CDVM) are investigated. Alternative structures for voltage multiplier based on power electronics switches are presented in high voltage pulsed powe...

Dynamic Voltage Restorer (DVR) is used in power distribution system to protect sensitive loads in voltage disturbances. The performance of DVR is related to the adopted configuration and control strategy used for inverters. In this paper, an asymmetrical voltage-source inverter controlled with fuzzy logic method based on hysteresis controller, is u...

Considering limited ability of Direct Methanol Fuel cell (DMFC) systems to produce power and importance of optimum methanol consumption, it is necessary to provide conditions, in which, the maximum power of DMFC from present fuel flow can be utilized. But, in different conditions, maximum power point (MPP) of DMFC is a unique point. So, operating p...

Ability of fuel cell systems to produce power is limited. So it is necessary to force the system to operate in conditions which correspond to fuel cell maximum power point (MPP). Since fuel cell MPP is a unique and fixed point of operation, load power requirements are not taken into account and output voltage will vary with variations of load resis...

In this paper, DC-DC Sheppard-Taylor converter operating principles is reviewed. State space averaged model of this converter is calculated and its equivalent circuit is obtained. Then, simulated in MATLAB/Simulink and compared with actual model. Afterward, a state-feedback controller is designed based on the obtained model. Results are compared an...

In this paper, at first Sheppard-Taylor PFC converter is introduced, and operation principle of this converter is studied. Then a new switching method of this converter is proposed and simulated in Matlab/Simulink. Simulation results are compared with conventional switching method and the benefits of this method are investigated.

Ability of fuel cell systems to produce power is limited. So it is necessary to force the system to operate in conditions which match up with fuel cell maximum power point (MPP). A MPP Tracking (MPPT) controller which utilizes a MPPT algorithm can undertake this duty. When fuel cell operates in this condition, since MPP is a unique and fixed point...

Ability of fuel cell systems to produce power is limited. So it is necessary to force the system to operate in conditions which correspond to fuel cell maximum power point (MPP). Since fuel cell MIPP is a unique and fixed point of operation, load power requirements are not taken into account and output voltage will vary with variations of load resi...

In this paper, a modified power factor correction (PFC) converter based on Sheppard-Taylor PFC converter is proposed, and operation principle of this converter is studied. Compared with conventional Sheppard-Taylor converter, the proposed converter has many advantages such as less ripple of input current that can considerably improve Sheppard-Taylo...