Seyed Majid Hashemzadeh

University of Tabriz · Faculty of Electrical and Computer Engineering

This paper presents a new model-based method to extract the global maximum power point (GMPP) of photovoltaic (PV) arrays under partial shading conditions (PSCs). In the proposed method, it is shown that independent of the pattern and intensity of the solar radiation, the position of the PV array GMPP voltage is always in the neighboring of one of...

In this paper, a new triple-switch triple-mode (TS-TM) high step-up DC-DC converter has been proposed. The proposed converter consists of three switches, four diodes, two magnetically coupled inductors, and three capacitors. This converter can provide a high voltage conversion ratio with high power efficiency and low voltage stress across the power...

This paper introduces a new coupled inductor based dual-input ultra-high step-up DC-DC converter with a high voltage conversion ratio, low voltage stress across semiconductor components, and high efficiency features. The coupled inductor and voltage multiplier circuit (VMC) techniques have been utilized to enhance the voltage gain. The blocking vol...

Based on the coupled inductor and voltage multiplier cells (VMCs), a nonisolated ultrahigh step-up dc–dc converter topology is presented in this article. The secondary side of the coupled inductor is paired with VMC in order to raise the output voltage. Therefore, a higher voltage gain with lower duty cycles is achieved by combining the coupled ind...

Non-uniform solar irradiance on the photovoltaic arrays decreases the output power due to the partial shading conditions. In this paper, the distribution of shade in the photovoltaic array rows is done by reconfiguring the shaded modules related to the photovoltaic array. The method proposed in this paper is a static approach based on prime numbers...

In this article a novel topology of DC-DC converter based on voltage multiplier cell and coupled inductor with higher efficiency and low blocking voltage across semiconductor is proposed for renewable energy application. The recommended topology obtains a high voltage gain using voltage multiplier cell and one coupled inductor. Only one power switc...

This article proposes an interleaved high step‐up DC–DC converter topology designed for renewable energy applications, featuring an ultra‐high voltage conversion ratio. The converter employs an interleaved structure, resulting in a low peak‐to‐peak ripple in the input source current, which is particularly advantageous for solar PV sources. To enhan...

In this paper a new topology of non-isolated high step-up DC-DC is proposed for renewable applications like photovoltaic (PV) power generation. This converter is designed based on coupled inductor and VMC techniques. The main benefits of the presented topology are: 1) Continues input current with low ripple, 2) Low voltage stress across semiconduct...

This article introduces a novel non-isolated single-switch high step-up DC-DC converter using a tri-winding coupled inductor (TWCL) for renewable energy applications such as PV systems. Also, the voltage multiplier cell (VMC) is used to attain a high voltage gain. The used VMC acts as a passive clamp circuit and reduces the voltage stress across th...

This paper proposes a new topology of non-isolated interleaved high step-up DC-DC converter, which is proper for renewable energy applications such as photovoltaic (PV) and fuel cell (FC) systems. The combination of coupled inductor and voltage multiplier cell (VMC) techniques leads to a further increase of the output voltage with lower duty cycle...

This paper proposes a new three winding coupled inductor (TWCI) based DC-DC converter with high voltage gain capability. Continuous input current with low ripple, low number of components, simple structure, high efficiency, and common ground between input and output ports make it suitable for renewable energy applications such as photovoltaic (PV)...

In this research work, a Maximum Power Point Tracking (MPPT) algorithm is proposed that improves the tracking accuracy and efficiency of the conventional Perturb and Observe (P&O) algorithm. Due to steady-state oscillations and passive dynamics, the efficiency of conventional P&O algorithm is significantly affected in varying climatic conditions. T...

This paper presents a new high step-up converter based on the voltage multiplier cell and coupled inductor for renewable energy applications such as fuel cell and photovoltaic power systems. This converter achieves a high voltage conversion ratio using a coupled inductor and voltage multiplier cell (VMC). The voltage multiplier cell acts as a passi...

Partial shading conditions decrease the photovoltaic string's output power because of the bypass diodes operation. Also, the extraction of maximum available power from photovoltaic systems has become important and challenging. To overcome partial shading conditions and improve power prediction, intelligent maximum power point tracking techniques ca...

In this paper, a novel structure of non-isolated dual-input ultra-high step-up DC-DC converter with low voltage stress across semiconductor elements and low input current ripple is suggested. In the presented converter, when the power switches are turned-OFF, two inputs inductors become series and the input current ripple will be reduced. This topo...

This paper introduces a novel bidirectional multi-port DC-DC converter recommended for electric vehicle applications. The proposed structure has three ports with bidirectional features which can be operated in both step-up and step-down modes. This converter can supply the load from two independent voltage sources and can obtain a high voltage conv...

This paper introduces a new DC-DC structure with a high voltage gain. The proposed structure can achieve higher voltage gain by using magnetic coupling and voltage multiplier circuit (VMC). The VMC is also used as a clamp circuit to suppress the voltage spike through the switch which leads to increase the overall system efficiency. Moreover, the pe...

This paper introduces a new non-isolated high gain dc-dc topology with magnetic coupling and voltage multiplier technique (VM). The high voltage conversion ratio can be achieved by selecting the suitable turn’s relation of the magnetic coupling. The VM circuit has been utilized for further extending the voltage rate. Also, the voltage spike through...

This work proposes a kind of DC–DC topology with a higher voltage conversion ratio. The suggested converter utilizes a coupled inductor and a voltage multiplier cell to enhance the voltage conversion ratio. The voltage multiplier cell has the feature of the clamping circuit, which can decrease the maximum voltage of the semiconductors elements. In...

Partial shading condition is an unavoidable issue for photovoltaic systems. This condition affects the performance of the photovoltaic systems. An important effect of the partial shading condition is causing power losses and reducing power efficiency. In this paper, different array structures with different types of connections between the photovol...

In this paper, an interleaved high voltage-gain DC-DC converter is proposed and analyzed. Low voltage-stress on semiconductors and low input current-ripple are the main features of this converter. Due to the mentioned features, this converter can be a suitable choice for renewable energy applications. In this structure, a voltage multiplier cell an...

In this paper, direct control of predictive power for three-phase rectifier using pulse width modulation is presented. For this purpose, direct power control is based on strategy of predictive control to achieve simultaneous control of active & reactive power of converter. To achieve this goal at the beginning of each period the switching average v...

In this paper, an improved Perturb & Observe algorithm proposed to maximum power point tracking in a photovoltaic array. In this work, the interleaved boost converter used, which can extract more power than a single converter structure. In the suggested approach, to improve performance of Perturb & Observe algorithm versus tracking accuracy, the re...

In this paper, a high step-up non-isolated DC-DC converter is proposed to provide high voltage-gain with low voltage-stress on semiconductors. The main feature of the proposed structure is its flexibility in providing constant output voltages with a reasonable range of voltage stress. This flexibility of the voltage-gain is achieved by different co...

Recently, renewable and sustainable energy sources such as PV are utilized as clean energy sources. However, these energy sources have a low output voltage, and in high voltage applications, high gain DC-DC converters are applied to enhance the output voltage of these types of energy sources. In this article, a non-isolated step-up DC-DC converter...

This paper presents a model-based approach for the global maximum power point (GMPP) tracking of solar strings under partial shading conditions. In the proposed method, the GMPP voltage is estimated without any need to solve numerically the implicit and nonlinear equations of the photovoltaic (PV) string model. In contrast to the existing methods i...

In this paper, a new method for extracting the global maximum power point (GMPP) of a PV array under partial shading conditions (PSCs) is presented. In the proposed method, it is shown that, independent of the pattern and intensity of the radiation, the GMPP position is always in the neighboring of the global peaks of one of the photovoltaic (PV) s...