Efficiency analysis and comparative study of hard and soft switching DC-DC converters in a wind farm

Prabhakar, A.; Bollinger, J.D.; Tao, Hong; Ferdowsi, Mehdi; Corzine, Keith

doi:10.1109/iecon.2008.4758290

Cited by 11 publications

(5 citation statements)

References 7 publications

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“…In a paralleling converter system, total losses are mostly related to conversion losses which mainly include switching loss of semiconductor components and conduction loss of parasitic resistive elements [25]- [27]. Since these losses are related with conversion current, even if constant input and output voltages are assumed, converter efficiency changes with its load current as shown in Fig.…”

Section: Optimization Problem Formulationmentioning

confidence: 99%

“…Since these losses are related with conversion current, even if constant input and output voltages are assumed, converter efficiency changes with its load current as shown in Fig. 3 [17], [25]- [29]. The highest efficiency is usually reached between 30% and 60% load (the power losses change with conversion current nonlinearly), there exists a room for optimization, which is to find the power sharing proportion where the losses of the system are minimum.…”

Section: Optimization Problem Formulationmentioning

confidence: 99%

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Tertiary and Secondary Control Levels for Efficiency Optimization and System Damping in Droop Controlled DC–DC Converters

Meng

Dragičević

Vasquez

et al. 2015

IEEE Trans. Smart Grid

127

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Droop control by means of virtual resistance (VR) control loops can be applied to paralleled dc-dc converters for achieving autonomous equal power sharing. However, equal power sharing does not guarantee an efficient operation of the whole system. In order to achieve higher efficiency and lower energy losses, this paper proposes a tertiary control level including an optimization method for achieving efficient operation. As the efficiency of each converter changes with the output power, VR values are set as decision variables for modifying the power sharing ratio among converters. A genetic algorithm is used in searching for a global efficiency optimum. In addition, a secondary control level is added to regulate the output voltage drooped by the VRs. However, system dynamics is affected when shifting up/down the VR references. Therefore, a secondary control for system damping is proposed and applied for maintaining system stability. Hardware-in-the-loop simulations are conducted to validate the effectiveness of this method. The results show that the system efficiency is improved by using tertiary optimization control and the desired transient response is ensured with system damping secondary control.Index Terms-DC-DC converters, droop method, efficiency optimization, hierarchical control, secondary control, system damping, tertiary control.1949-3053 c 2015 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.See http://www.ieee.org/publications_standards/publications/rights/index.html for more information.Lexuan Meng (S'13) received the B.S. degree in electrical engineering, and the M.S. degree in electric machines and electric apparatus from the

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Section: Optimization Problem Formulationmentioning

confidence: 99%

Section: Optimization Problem Formulationmentioning

confidence: 99%

Tertiary and Secondary Control Levels for Efficiency Optimization and System Damping in Droop Controlled DC–DC Converters

Meng

Dragičević

Vasquez

et al. 2015

IEEE Trans. Smart Grid

127

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“…But, it could not operate with a wide input voltage range and non-isolation. [3,4] In this paper is development of the flyback converter with zero voltage switched. This converter called flyback resonant converter.…”

Section: Introductionmentioning

confidence: 99%

Wide Input Voltage Range 2kW Flyback Resonant Converter Design for Wind Turbine

Thitayanuwat

Neammanee

2011

AMM

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This paper presents a design of wide input voltage range 2 kW flyback resonant converter for the wind turbine system. The propose converter design for operated under zero voltage switch, it could increase the efficiency of system by reducing the turn on switching loss. The advantages of this converter can be operated in a wide input voltage range, isolation and used a few devices. From the simulation result with PSpice software and experimentation results are conform together which shows the designed circuit can be operated under zero voltage with high efficiency and wide input voltage range (90-240V), by the simulation results can be used for the specified rate of power semi-conductor devices.

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“…The converter topologies that create this are more complicated, and the control is often more difficult. Despite the complications, these converters are used in high-efficiency designs since they drastically reduce switching losses associated with hard-switching [7].…”

Section: Soft Switchingmentioning

confidence: 99%

“…Noting: (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) indicates this converter operates in a boost configuration, and output cannot be reduced below a certain point. gate timing were chosen within the suggested criteria from [21].…”

mentioning

confidence: 99%

High Voltage Resonant Self-Tracking Current-Fed Converter

McClusky¹

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Efficiency analysis and comparative study of hard and soft switching DC-DC converters in a wind farm

Cited by 11 publications

References 7 publications

Tertiary and Secondary Control Levels for Efficiency Optimization and System Damping in Droop Controlled DC–DC Converters

Tertiary and Secondary Control Levels for Efficiency Optimization and System Damping in Droop Controlled DC–DC Converters

Wide Input Voltage Range 2kW Flyback Resonant Converter Design for Wind Turbine

High Voltage Resonant Self-Tracking Current-Fed Converter

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