Saeed Rahimpour - IEEE Xplore Author Profile

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Increasingly, dc microgrids are attracting attention because of their universality, high efficiency, and potential application market. To enhance the fault protection of dc systems, solid-state circuit breakers (SSCBs) have been developed to perform fast protection. However, there are still challenges including decoupling of the source and load during operation, using the switches of the main path...Show More
With the increase of domestic generation resources (mainly photovoltaic), and the use of storage systems in many buildings, the utilization of the dc system along with ac system is being developed. For this purpose, energy routers with multiple ac and dc ports are employed. By the way, there are not enough standards to integrate the dc systems into the ac grid and safety considerations are still a...Show More
The reliability of power electronic converters is a major concern in industrial applications because of using prone-to-failure elements such as high-power semiconductor devices and electronic capacitors. Hence, designing fault-tolerant inverters has been of great interest among researchers in both academia and industry over the last decade. Among the three stages of fault management, compensating ...Show More
A single-phase single-stage flying inductor based buck-boost inverter (S2FIB2I) is presented in this paper. Operation in buck, boost and buck-boost modes gives the proposed topology the ability to inject power into the grid at a wide range of input voltages. In other words, the proposed inverter has a dynamic voltage gain. The direct connection of the negative terminal of the input source with the...Show More
An expected lifetime of converters is of great importance for optimal decision-making in the planning of modern Power Electronic (PE) systems. Hence, the lifetime management of power electronic systems has attracted a lot of attention in academia and industry. This paper is a guideline for managing the lifetime of power converters. Analyzing the different kinds of failures, failure modes and their...Show More
Comparatively to an ac grid, it is easy to integrate distributed energy sources when implementing a dc microgrid. In addition, the efficiency and the reliability of the dc microgrid systems are higher than those of the ac system. However, the protection of the dc microgrid system including interruption and isolation of short-circuit fault currents remains an important concern. The traditional mech...Show More
In this study, a single-phase single-stage grid-connected structure without transformer is presented. The proposed structure has the ability to boost the input voltage level without adding an extra dc-dc stage. In addition, being transformer-less makes it cost-efficient and small. Since in positive and negative half cycles there is a route for the capacitor to get charged, the capacitor has less v...Show More
In this study, a new five-level common grounded grid-connected inverter is presented. In the proposed multilevel inverter, the charging and discharging process of the applied capacitors generate the output voltage waveform. Also, the proposed topology is based on neutral point clamped (NPC) topology. So, it can overcome the parasitic current issue in the photovoltaic (PV) system, which is the majo...Show More
High voltage gain DC-DC boost converters are widely used in grid-connected applications through integration with the Renewable Energy Sources (RESs). Photovoltaic (PV) arrays or Fuel Cells (FCs) generate a limited value of the DC voltages and then for high power and high voltage applications, at the first stage, these voltages should be increased. This study presents a high gain, single-switched, ...Show More
In this article, an optimal structure for a high step-up nonisolated dc–dc converter is proposed. In this topology, the required high voltage gain can be obtained with a low number of elements. Furthermore, by implementing an auxiliary circuit, zero-voltage switching condition for the switches is provided, input current ripple has been reduced to almost zero, and all of the power diodes turn off a...Show More
In this paper, the Model Predictive Control (MPC), of a transformer-less single-phase single-stage grid-tied current-source inverter is presented. The common-grounding feature of this converter increases its reliability and suppresses the leakage current. Moreover, current source inverters (CSIs) are considered as good options due to their higher reliability, fault tolerant capabilities, quasi sof...Show More
A new dual-coupled inductor (CI) single-switch high step-up dc–dc topology featuring high power density is proposed in this study. Various capacitive power transfer methods, as well as inductive power transfer techniques, are utilized to act as a more efficient power interface between the input and the load. Three ports in the output terminal are employed to distribute the overall output voltage, ...Show More
With the recent development in smart grid systems, there is now a growing interest in the development of on-line monitoring techniques. This is to reduce the maintenance costs as well as minimizing the probability of unexpected outages, or potentially to prevent catastrophic failures in the electrical network. Monitoring of power transformers is essential for utilities as they are a critical asset...Show More
This paper presents a novel impedance-source bidirectional dc-dc converter. The proposed converter has a wide regulation range of voltage when comparing to conventional bidirectional dc-dc converters. Moreover, it has higher reliability due to elimination of the dead time and use of the shoot through states. The main advantage of this novel topology is the ability to utilize supercapacitors with h...Show More