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A novel method for extending the output power back-off range of an asymmetrical Doherty power amplifier Research Article

Mingyu LI, Xiaobing CHENG, Zhijiang DAI, Kang ZHONG, Tianfu CAI, Chaoyi HUANG

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 3,   Pages 470-479 doi: 10.1631/FITEE.2200250

Abstract: This study reveals that the OPBO range of the DPA can be extended by tuning the of the peaking stageaway from infinity and changing the phase delay of the output matching network of the carrier powerBased on this theory, a large-OPBO-range high-efficiency asymmetrical DPA working band from 1.55 to 2.2The range of the measured efficiency is 42.2%–52.1% in the OPBO state and 47%–62.7% in the saturationThe OPBO range is 11.1–13.2 dB.

Keywords： Doherty power amplifier (DPA)     Output power back-off (OPBO)     Output impedance     Network phase    

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Simulation of grid connection and maximum power point tracking control of brushless doubly-fed generatorin wind power system

Hicham SERHOUD, Djilani BENATTOUS

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 380-387 doi: 10.1007/s11708-013-0252-z

Abstract: during cutting-in grid confirmed the good dynamic performance of grid synchronization and effective power

Keywords： brushless doubly-fed generator (BDFG)     modeling     grid connection control     back-to-back pulse-width modulation(PWM) converter     wind power generation    

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Investigation on the integral output power model of a large-scale wind farm

BAO Nengsheng, MA Xiuqian, NI Weidou

Frontiers in Energy 2007, Volume 1, Issue 1,   Pages 67-78 doi: 10.1007/s11708-007-0006-x

Abstract: The integral output power model of a large-scale wind farm is needed when estimating the wind farm soutput over a period of time in the future.The actual wind speed power model and calculation method of a wind farm made up of many wind turbineThe calculation algorithms and steps of the integral output power model of a large-scale wind farm areFinally, an actual power output of the wind farm is calculated and analyzed by using the practical measurement

Keywords： power model     actual     energy     large-scale     practical measurement    

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Optimization of power and efficiency for an irreversible Diesel heat engine

Shiyan ZHENG, Guoxing LIN

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 560-565 doi: 10.1007/s11708-010-0018-9

Abstract: using the thermodynamic analysis and optimal control theory methods, the analytical expressions of poweroutput and efficiency of the Diesel heat engine are derived.Moreover, the optimum criterion of some important parameters, such as the power output, efficiency, pressure

Keywords： Diesel heat engine     irreversibility     power output     efficiency     parameter optimization    

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Discussion on back-to-back two-stage centrifugal compressor compact design techniques

Lei HUO, Huoxing LIU

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4,   Pages 390-400 doi: 10.1007/s11465-013-0278-2

Abstract:

Design a small flow back-to-back two-stage centrifugal compressor in the aviation turbocharger, theTherefore, the stationary part of the back-to-back two-stage centrifugal compressor should pay full attention

Keywords： back-to-back     two-stage     centrifugal compressor     design     Internal flow    

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Choosing configurations of transmission line tower grounding by back flashover probability value

Dmitry KUKLIN

Frontiers in Energy 2016, Volume 10, Issue 2,   Pages 213-226 doi: 10.1007/s11708-016-0398-6

Abstract: The probability of back flashover, which provides both qualitative and quantitative estimate of the groundingDifferent approaches are examined for identifying the back flashover probability, as not only amplitudesIt is found that lightning current waveform can greatly influence calculated back flashover probability

Keywords： grounding     transmission line tower     back flashover probability     FDTD method    

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Unified cycle model of a class of internal combustion engines and their optimum performance characteristics

Shiyan ZHENG

Frontiers in Energy 2011, Volume 5, Issue 4,   Pages 367-375 doi: 10.1007/s11708-011-0170-x

Abstract: Based on the thermodynamic analysis method, the mathematical expressions of the power output and efficiencyThe optimum criteria of some important parameters such as the power output, efficiency and pressure ratio

Keywords： internal combustion engine     irreversibility     power output     efficiency     optimization    

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Optimization of the power, efficiency and ecological function for an air-standard irreversible Dual-Miller

Zhixiang WU, Lingen CHEN, Yanlin GE, Fengrui SUN

Frontiers in Energy 2019, Volume 13, Issue 3,   Pages 579-589 doi: 10.1007/s11708-018-0557-z

Abstract: To analyze the effects of the cut-off ratio ( ) and Miller cycle ratio ( ) on the power output ( ), thermalThe effects of and on , , , maximum power output ( ), maximum efficiency ( ) and maximum ecologicalThe results show that the irreversible DMC engine can reach a twice-maximum power, a twice-maximum efficiency

Keywords： finite-time thermodynamics     Dual-Miller cycle     power output     thermal efficiency     ecological function    

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A review on front end conversion in ocean wave energy converters

Nagulan SANTHOSH,Venkatesan BASKARAN,Arunachalam AMARKARTHIK

Frontiers in Energy 2015, Volume 9, Issue 3,   Pages 297-310 doi: 10.1007/s11708-015-0370-x

Abstract: detail which is positioned in the first stage of the wave energy converter among other stages such as powertake off (PTO) and electrical energy conversion.

Keywords： wave energy converter     point absorbers     power take off (PTO)     front end energy conversion    

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DFIG sliding mode control fed by back-to-back PWM converter with DC-link voltage control for variable

Youcef BEKAKRA,Djilani BEN ATTOUS

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 345-354 doi: 10.1007/s11708-014-0330-x

Abstract: This paper proposes an indirect power control of doubly fed induction generator (DFIG) with the rotorconnected to the electric grid through a back-to-back pulse width modulation (PWM) converter for variablespeed wind power generation.theory, also called sliding mode control, is applied to achieve the control of the active and reactive powerA proportional-integral-(PI) controller is used to keep the DC-link voltage constant for a back-to-back

Keywords： doubly fed induction generator (DFIG)     wind turbine     back-to-back pulse width modulation (PWM)     DC-link    

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Optimal Su-Do-Ku based interconnection scheme for increased power output from PV array under partial

P. SRINIVASA RAO,P. DINESH,G. SARAVANA ILANGO,C. NAGAMANI

Frontiers in Energy 2015, Volume 9, Issue 2,   Pages 199-210 doi: 10.1007/s11708-015-0350-1

Abstract: They drastically reduce the power output because of mismatch losses, which are reliant on the shape ofThe power output can be improved by distributing the shade over various rows to maximize the currentThe results prove that the power output is higher in the proposed improved Su-Do-Ku reconfiguration technique

Keywords： array configuration     mismatch losses     partial shading     line losses     Su-Do-Ku arrangement    

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Advanced purification and comprehensive utilization of yellow phosphorous off gas

Ping NING,Xiangyu WANG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 2,   Pages 181-189 doi: 10.1007/s11783-014-0698-1

Abstract: Without appropriate purification and removal, this off gas has potential to cause severe pollution problemsPurified yellow phosphorous off gas can be beneficially reused as a raw material in chemical productionIn this paper, the significance of purification and reutilization of yellow phosphorous off gas are exploredprocesses, and main characteristics of the technologies for purification and reuse of yellow phosphorus offcomprehensive reutilization can be an effective solution for heavy pollution resulting from yellow phosphorous off

Keywords： yellow phosphorous off gas     purification     comprehensive utilization    

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Renewable synthetic fuel: turning carbon dioxide back into fuel

Frontiers in Energy 2022, Volume 16, Issue 2,   Pages 145-149 doi: 10.1007/s11708-022-0828-6

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Typical off-design analytical performances of internal combustion engine cogeneration

Xiaohong HE, Ruixian CAI

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 184-192 doi: 10.1007/s11708-009-0007-z

Abstract: Based on experimental data, typical off-design characteristic curves with corresponding formulas of internalsingle-pressure heat recovery steam generator (HRSG) and influence of ambient pressure on combined heat and power(CHP) system, off-design operation regularities of ICE cogeneration are analyzed.Moreover, ICE power output and efficiency decrease with the decrease in ambient pressure.

Keywords： internal combustion engine (ICE)     cogeneration     heat recovery steam generator (HRSG)     off-design     superheated    

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Quantification of emission variability for off-road equipment in China based on real-world measurements

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 2, doi: 10.1007/s11783-021-1455-x

Abstract:

• Emissions from 53 in-use diesel-fueled off-road equipment were measured

Keywords： Off-road equipment     Portable emission measurement system (PEMS)     Real-world emissions     Diesel engine    

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Title Author Date Type Operation

A novel method for extending the output power back-off range of an asymmetrical Doherty power amplifier

Mingyu LI, Xiaobing CHENG, Zhijiang DAI, Kang ZHONG, Tianfu CAI, Chaoyi HUANG

Journal Article

Simulation of grid connection and maximum power point tracking control of brushless doubly-fed generatorin wind power system

Hicham SERHOUD, Djilani BENATTOUS

Journal Article

Investigation on the integral output power model of a large-scale wind farm

BAO Nengsheng, MA Xiuqian, NI Weidou

Journal Article

Optimization of power and efficiency for an irreversible Diesel heat engine

Shiyan ZHENG, Guoxing LIN

Journal Article

Discussion on back-to-back two-stage centrifugal compressor compact design techniques

Lei HUO, Huoxing LIU

Journal Article

Choosing configurations of transmission line tower grounding by back flashover probability value

Dmitry KUKLIN

Journal Article

Unified cycle model of a class of internal combustion engines and their optimum performance characteristics

Shiyan ZHENG

Journal Article

Optimization of the power, efficiency and ecological function for an air-standard irreversible Dual-Miller

Zhixiang WU, Lingen CHEN, Yanlin GE, Fengrui SUN

Journal Article

A review on front end conversion in ocean wave energy converters

Nagulan SANTHOSH,Venkatesan BASKARAN,Arunachalam AMARKARTHIK

Journal Article

DFIG sliding mode control fed by back-to-back PWM converter with DC-link voltage control for variable

Youcef BEKAKRA,Djilani BEN ATTOUS

Journal Article

Optimal Su-Do-Ku based interconnection scheme for increased power output from PV array under partial

P. SRINIVASA RAO,P. DINESH,G. SARAVANA ILANGO,C. NAGAMANI

Journal Article

Advanced purification and comprehensive utilization of yellow phosphorous off gas

Ping NING,Xiangyu WANG

Journal Article

Renewable synthetic fuel: turning carbon dioxide back into fuel

Journal Article

Typical off-design analytical performances of internal combustion engine cogeneration

Xiaohong HE, Ruixian CAI

Journal Article

Quantification of emission variability for off-road equipment in China based on real-world measurements

Journal Article