Boost power converters have been widely used for Power Factor Correction (PFC) in AC-DC conversions [1] and for power management in battery powered DC-DC conversions [2]. Moving beyond low-power applications, such as cellular phones, smart phones and other portable electronic products, boost converters are being used more and more in medium-power applications. For example, in computing and cons...

The photovoltaic (PV) systems exhibits nonlinear I-V characteristics and maximum power point varies with solar radiation or insolation and temperature. An intermediate pulse width modulation dc to dc converters can increase efficiency of the system by providing impedance matching between the PV system and the load and operating the PV cell arrays at their maximum power point using MPPT techniqu...

Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Matthew Turnquist Name of the doctoral dissertation Integrated DC-DC Converters for Adaptive Ultra-Low-Energy Processors Publisher School of Electrical Engineering Unit Department of Microand Nanosciences Series Aalto University publication series DOCTORAL DISSERTATIONS 216/2016 Field of research Electronic circuit design Manu...

In this paper, a new high efficiency, high step-up, non-isolated, interleaved DC-DC converter for renewable energy applications is presented. In the suggested topology, two modified step-up KY converters are interleaved to obtain a high conversion ratio without the use of coupled inductors. In comparison with the conventional interleaved DC-DC converters such as boost, buck-boost, SEPIC, ZETA a...

Power electronic converter systems for applications such as telecom, automotive, and space can have dc voltage buses that are backed up with batteries or super-capacitors. These batteries or super-capacitors are connected to the buses with bidirectional dc–dc converters which allow them to discharged or charged, depending on the operating conditions. Bidirectional dc–dc converters may be isolat...

This paper describes a DC isolated network which is fed with Distributed Generation (DG) from photovoltaic (PV) renewable sources for supplying unbalanced AC loads. The battery energy storage bank has been connected to the DC network via DC/DC converter to control the voltage of the network and optimize the operation of the PV generation units. The PV arrays are connected to the DC network ...

Load balancing is an important issue in distributed systems. In addition, using distributed generation sources such as photovoltaic is increasing. Power electronic converters are main interfaces between the sources and the grid. In this paper, a method has been proposed to reduce the load imbalancing in distribution networks using PV Grid Interface Converter. Two DC/DC and DC/AC converters have...

This paper proposes a three levels cascade control topology for the VSC and DC/DC converters used in DC grids. The inner control level regulates local current as in all VSC converters. The middle control level uses PI feedback control of local DC voltage on all terminals. At the highest level, each station reference DC voltage is set based on desired power transfer and observing DC voltage limi...

Switched-capacitor DC-DC converters are useful alternatives to inductor-based converters in many lowpower and medium-power applications. This work develops a straightforward analysis method to determine a switched-capacitor converter’s output impedance (a measure of performance and power loss). This resistive impedance is a function of frequency and has two asymptotic limits, one corresponding ...