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Techno-economic assessment of providing control energy reserves with a biogas plant

Ervin Saracevic, David Woess, Franz Theuretzbacher, Anton Friedl, Angela Miltner

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 763-771 doi: 10.1007/s11705-018-1776-x

Abstract: Power supply fluctuations must be compensated by energy system flexibility.In this study, the technical and economic effects of providing positive secondary control energy reservesThe findings show that the installed biogas storage capacity is sufficient to provide control energyreserves while simultaneously producing biomethane.Profitability of providing control energy reserves largely depends on the prices at the control energy

Keywords： biogas plant     process simulation     control energy reserves     economic assessment     gas storage    

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Theoretical and Technological Challenges of Deep Underground Energy Storage in China Review

Chunhe Yang, Tongtao Wang, Haisheng Chen

Engineering 2023, Volume 25, Issue 6,   Pages 168-181 doi: 10.1016/j.eng.2022.06.021

Abstract:

Deep underground energy storage is the use of deep underground spaces for large-scale energy storage, which is an important way to provide a stable supply of clean energy, enable a strategic petroleumRock salt formations are ideal geological media for large-scale energy storage, and China is rich insalt rock resources and has a major shortage of energy storage space.storage; and ⑤ ensuring the long-term function of deep underground energy storage spaces.

Keywords： Energy reserves     Deep underground energy storage     Bedded rock salt     Salt cavern     Rock mechanics    

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Outline of Strip Rolling Technological Control Theory

Zhang Jinzhi

Strategic Study of CAE 2001, Volume 3, Issue 4,   Pages 46-55

Abstract: This system reflects only the static law of rolling process,so it is necessary to control dynamic rollingmechanics took the lead before the establishment of spring equation, after that the rolling process controlIn this paper,the concept of technological control theory is put forward.A new theory system, which is based on fundamental rolling technology control theory, is set up.process;shape theory system, which resembles gauge control theory,by defining dual parameter,is established

Keywords： continuous rolling process control     tension in continuous rolling     gauge control     shape stiffness     springequation for rolling mill     comprehensive equal reserves for load distribution    

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A replenishment for resource reserves：functional reserves— Replacing 1/10~1/5 strategic oil reserve with

Jin Yong,Chen Bingzhen

Strategic Study of CAE 2008, Volume 10, Issue 11,   Pages 4-6

Abstract:

The strategic oil reserve is very important for every large country in the world. In order to meet the basic requirement of the state safety, 3 months strategic oil reserve in every large country was proposed by the different international organizations such as UN, EU, etc. For China, the total amount of strategic oil reserve must be up to about 30 to 90 millions. It is very difficult to achieve it without enormous capita in short time. Based on a new conception as "function reserve" to replenish the "resource reserve", this goal could be more easy to be accomplished.Namely, storing more methanols replaces some percentage of oil. Moreover, the state safety should be ensured. This topic is discussed in the article in detail.

Keywords： function store     strategical oil store     methanol    

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Optimal dynamic emergency reserve activation using spinning, hydro and demand-side reserves

S. Surender REDDY,P. R. BIJWE,A. R. ABHYANKAR

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 409-423 doi: 10.1007/s11708-016-0431-9

Abstract: An optimal plan is developed to handle the emergency, using the coordinated action of fast and slow reservesIt considers the reserves supplied by the conventional thermal generators (spinning reserves), hydropower units and load demands (demand-side reserves).The optimal backing down of costly/fast reserves and bringing up of slow reserves in each sub-interval

Keywords： demand-side reserves     dynamic reserve activation approach     hydro power units     post contingency     sequentialreserve activation approach     spinning reserves    

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Design and control optimization of energy systems of smart buildings today and in the near future

Shengwei WANG, Wenjie GANG

Frontiers of Engineering Management 2017, Volume 4, Issue 1,   Pages 58-66 doi: 10.15302/J-FEM-2017005

Abstract: Design and control optimization of building energy systems therefore plays a significant role to obtainThis paper introduces a general methodology for the design and control optimization of building energyTo improve the operation performance, the optimal control strategies that can be used by different systemsThe control strategies for chillers, pumps and fresh air systems are optimized.The energy saving and cost from the design and control optimization methods are analyzed.

Keywords： Design optimization     Optimal control     Smart building     Energy efficiency    

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QPSO-ILF-ANN-based optimization of TBM control parameters considering tunneling energy efficiency

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 25-36 doi: 10.1007/s11709-022-0908-z

Abstract: However, the TBM control parameters set based on operator experience may not necessarily be suitableHence, a method to optimize TBM control parameters using an improved loss function-based artificial neuralartificial neural network (ANN) loss function based on the penetration rate and rock-breaking specific energythe TBM penetration rate by 14.85% and 13.71%, respectively, and reduces the rock-breaking specific energy

Keywords： tunnel boring machine     control parameter optimization     quantum particle swarm optimization     artificialneural network     tunneling energy efficiency    

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Effect of repeated gonadotropin stimulation on ovarian reserves and proliferation of ovarian surface

Linlin LIANG, Bei XU, Guijin ZHU

Frontiers of Medicine 2009, Volume 3, Issue 2,   Pages 220-226 doi: 10.1007/s11684-009-0037-2

Abstract: for 5 cycles]; single ovarian stimulated group ( =25; receiving 5 IU PMSG and hCG for 1 cycle), and controlof the OSE in the single ovarian stimulated group (56.4%) was significantly higher than that in the control

Keywords： gonadotropin-releasing hormone     ovarian reserve     embryo developmental ability     ovarian surface epithelium    

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Dynamic contribution of variable-speed wind energy conversion system in system frequency regulation

Yajvender Pal VERMA, Ashwani KUMAR

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 184-192 doi: 10.1007/s11708-012-0185-y

Abstract: Thus, it is important that wind turbines also contribute to system frequency control.The frequency deviation is considered by the controller to provide the inertial control.An additional reference power output is used which helps the DFIG to release kinetic energy stored inThe optimal speed control parameters have been used for the DFIG to increases its participation in frequencycontrol.

Keywords： doubly fed induction generator (DFIG)     load frequency control     inertial control     wind energy conversion    

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Modeling and control of photovoltaic energy conversion connected to the grid

Rebei NAJET, Ben Ghanem BELGACEM, Hasnaoui OTHMAN

Frontiers in Energy 2012, Volume 6, Issue 1,   Pages 35-46 doi: 10.1007/s11708-012-0169-y

Abstract: This paper presents modeling and control of a photovoltaic generator (PVG) connected to the grid.The electrical energy from a PVG is transferred to the grid via two static converters (DC/DC and DC/ACThe objective of the proposed control strategy is to maximize energy captured from the PVG.To control the DC/AC inverter, an intelligent system based on two structures is constructed: a currentsource control structure and a voltage source control structure.

Keywords： photovoltaic generator (PVG)     maximum power point tracker     grid-connected     static converters    

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Modeling and control of a permanent magnet synchronous generator dedicated to standalone wind energy

Louar FATEH,Ouari AHMED,Omeiri AMAR,Djellad ABDELHAK,Bouras LAKHDAR

Frontiers in Energy 2016, Volume 10, Issue 2,   Pages 155-163 doi: 10.1007/s11708-016-0410-1

Abstract: Among renewable energies, wind energy is now widely used.The control of the permanent magnet synchronous generator (PMSG) can be affected with the implementationof various techniques of control.techniques, such as direct control of the torque (DTC) to control the load side converter (LSC), thecontrol of the speed of the turbine and the DC-bus voltage ensured by PI regulators.

Keywords： wind turbine     permanent magnet synchronous generator (PMSG)     converter     proportional-integral (PI)     control     direct control of the torque (DTC)     regulation    

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Motion control of multi-actuator hydraulic systems for mobile machineries: Recent advancements and future

Bing XU, Min CHENG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2,   Pages 151-166 doi: 10.1007/s11465-018-0470-5

Abstract:

This paper presents a survey of recent advancements and upcoming trends in motion control technologiesIn this study, an overview of the evolution of existing throttling control technologies is presented,Recent advancements in energy-saving hydraulic technologies, such as individual metering, displacementThe impact of energy-saving hydraulic technologies on dynamic performance and control solutions are alsoan overall consideration of energy efficiency, controllability, cost, reliability, and other aspects

Keywords： motion control     electrohydraulic control     energy efficiency     mobile machineries    

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Robust nonlinear control via feedback linearization and Lyapunov theory for permanent magnet synchronousgenerator-based wind energy conversion system

Ridha CHEIKH, Arezki MENACER, L. CHRIFI-ALAOUI, Said DRID

Frontiers in Energy 2020, Volume 14, Issue 1,   Pages 180-191 doi: 10.1007/s11708-018-0537-3

Abstract: In this paper, the method for the nonlinear control design of a permanent magnet synchronous generatorbased-wind energy conversion system (WECS) is proposed in order to obtain robustness against disturbancesovercomes both the problem of nonlinearity and the uncertainty of the parameter compared to such classical controldesigns based on traditional control techniques.

Keywords： permanent magnet synchronous generator     wind energy conversion system     stochastic     differential geometric     feedback linearization     maximum power point tracking     Lyapunov     robust control    

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Performance of PI controller for control of active and reactive power in DFIG operating in a grid-connectedvariable speed wind energy conversion system

Azzouz TAMAARAT,Abdelhamid BENAKCHA

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 371-378 doi: 10.1007/s11708-014-0318-6

Abstract: Due to several factors, wind energy becomes an essential type of electricity generation.The share of this type of energy in the network is becoming increasingly important.The objective of this work is to present the modeling and control strategy of a grid connected wind powerIt will introduce the vector control, which makes it possible to control independently the active andfor some optimization criteria (energy efficiency and the robustness of the control).

Keywords： wind power     doubly fed induction generator (DFIG)     vector control     active power     reactive power     maximum power    

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A smooth co-ordination control for a hybrid autonomous power system (HAPS) with battery energy storage

C. K. ARAVIND,G. SARAVANA ILANGO,C. NAGAMANI

Frontiers in Energy 2015, Volume 9, Issue 1,   Pages 31-42 doi: 10.1007/s11708-015-0347-9

Abstract: standalone hybrid power system constitutes a synchronous generator driven by a diesel engine, renewable energysource (wind) apart from a battery energy storage system.A coherent control strategy to regulate the voltage and frequency of the standalone grid is proposedon a laboratory prototype which involves a TMS320LF2407A DSP controller to digitally implement the controlThe control strategy is verified for step changes in load and variation in wind power.

Keywords： standalone hybrid power system     battery energy storage system (BESS)     power conversion    

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Title Author Date Type Operation

Techno-economic assessment of providing control energy reserves with a biogas plant

Ervin Saracevic, David Woess, Franz Theuretzbacher, Anton Friedl, Angela Miltner

Journal Article

Theoretical and Technological Challenges of Deep Underground Energy Storage in China

Chunhe Yang, Tongtao Wang, Haisheng Chen

Journal Article

Outline of Strip Rolling Technological Control Theory

Zhang Jinzhi

Journal Article

A replenishment for resource reserves：functional reserves— Replacing 1/10~1/5 strategic oil reserve with

Jin Yong,Chen Bingzhen

Journal Article

Optimal dynamic emergency reserve activation using spinning, hydro and demand-side reserves

S. Surender REDDY,P. R. BIJWE,A. R. ABHYANKAR

Journal Article

Design and control optimization of energy systems of smart buildings today and in the near future

Shengwei WANG, Wenjie GANG

Journal Article

QPSO-ILF-ANN-based optimization of TBM control parameters considering tunneling energy efficiency

Journal Article

Effect of repeated gonadotropin stimulation on ovarian reserves and proliferation of ovarian surface

Linlin LIANG, Bei XU, Guijin ZHU

Journal Article

Dynamic contribution of variable-speed wind energy conversion system in system frequency regulation

Yajvender Pal VERMA, Ashwani KUMAR

Journal Article

Modeling and control of photovoltaic energy conversion connected to the grid

Rebei NAJET, Ben Ghanem BELGACEM, Hasnaoui OTHMAN

Journal Article

Modeling and control of a permanent magnet synchronous generator dedicated to standalone wind energy

Louar FATEH,Ouari AHMED,Omeiri AMAR,Djellad ABDELHAK,Bouras LAKHDAR

Journal Article

Motion control of multi-actuator hydraulic systems for mobile machineries: Recent advancements and future

Bing XU, Min CHENG

Journal Article

Robust nonlinear control via feedback linearization and Lyapunov theory for permanent magnet synchronousgenerator-based wind energy conversion system

Ridha CHEIKH, Arezki MENACER, L. CHRIFI-ALAOUI, Said DRID

Journal Article

Performance of PI controller for control of active and reactive power in DFIG operating in a grid-connectedvariable speed wind energy conversion system

Azzouz TAMAARAT,Abdelhamid BENAKCHA

Journal Article

A smooth co-ordination control for a hybrid autonomous power system (HAPS) with battery energy storage

C. K. ARAVIND,G. SARAVANA ILANGO,C. NAGAMANI

Journal Article