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Optimal Power-Down Strategies

John Augustine, Sandy Irani, Chaitanya Swamy
2008 SIAM journal on computing (Print)  
We give an algorithm that, given a system, produces a deterministic strategy whose competitive ratio is arbitrarily close to optimal.  ...  We also give an algorithm to produce the optimal online strategy given a system and a probability distribution that generates the length of the idle period.  ...  We give an algorithm that takes as input a description of a system and a probability distribution generating the idle period length and produces the optimal power-down strategy.  ... 
doi:10.1137/05063787x fatcat:7xayjyh5ffak5ljdgireyzgp5a

Optimal Power-Down Strategies

J. Augustine, S. Irani, C. Swamy
45th Annual IEEE Symposium on Foundations of Computer Science  
We give an algorithm that, given a system, produces a deterministic strategy whose competitive ratio is arbitrarily close to optimal.  ...  We also give an algorithm to produce the optimal online strategy given a system and a probability distribution that generates the length of the idle period.  ...  We give an algorithm that takes as input a description of a system and a probability distribution generating the idle period length and produces the optimal power-down strategy.  ... 
doi:10.1109/focs.2004.50 dblp:conf/focs/AugustineIS04 fatcat:jdltxkmajjhpblynbrlwi72hgy

Comparison of loads for wind turbine down-regulation strategies

Jiangsheng Zhu, Kuichao Ma, Mohsen Soltani, Amin Hajizadeh, Zhe Chen
2017 2017 11th Asian Control Conference (ASCC)  
For wind farm active power setpoint tracking, both farm level and turbine level down-regulation strategies should to be optimized considering turbine health condition.  ...  In this paper we suggest appropriate down-regulation strategy to control wind turbine for active power reference tracking. we compare four different down-regulation strategies, namely Const-Ω, Const-λ  ...  This strategy can decrease the frequency and amplitude of the pitch system. The author compares the optimization results of these three down-regulation strategies in wind farm power in [5] ,.  ... 
doi:10.1109/ascc.2017.8287618 dblp:conf/ascc/ZhuMSHC17 fatcat:xrips332y5dl3gtbded33tg6ie

Wind turbine down-regulation strategy for minimum wake deficit

Kuichao Ma, Jiangsheng Zhu, Mohsen Soltani, Amin Hajizadeh, Zhe Chen
2017 2017 11th Asian Control Conference (ASCC)  
Down-regulation mode of wind turbine is commonly used no matter for the reserve power for supporting ancillary service to the grid, power optimization in wind farm or reducing power loss in the fault condition  ...  A down-regulation strategy based on minimum wake deficit is proposed in this paper, for the power improvement of the downwind turbine in low and medium wind speed region.  ...  In [3] , the authors analyse and compare the simulation results of these three down-regulation strategies on the power optimization of wind farm.  ... 
doi:10.1109/ascc.2017.8287595 dblp:conf/ascc/MaZSHC17 fatcat:lizju4rabbe67ew6sgen6gjw2q

Energy Efficiency and Renewable Energy Management with Multi-State Power-Down Systems

James Andro-Vasko, Wolfgang Bein, Hiro Ito
2019 Information  
For the continuous case, the authors develop various strategies, namely linear, optimal-following, progressive and exponential.  ...  The authors analyze power-down problems in the framework of online competitive analysis as to obtain performance guarantees in the absence of reliable forecasting.  ...  In Section 5, the authors present the continuous model, and focus on five online power-down strategies: linear, optimal-following, progressive, logarithmic and exponential.  ... 
doi:10.3390/info10020044 fatcat:pa3acabmunahrccefcw2oksdry

Optimal Power Dispatch of an Offshore Wind Farm under Generator Fault

Kuichao Ma, Jiangsheng Zhu, Mohsen Soltani, Amin Hajizadeh, Zhe Chen
2019 Applied Sciences  
The proposed optimal power dispatch strategy was compared with the two generally-used fault-handling methods and the proportional dispatch strategy in simulation.  ...  In this paper, the Particle Swarm Optimization (PSO) algorithm is used to optimize the active power dispatch of wind farms under generator cooling system faults.  ...  Because power dispatch and power optimization are involved in this paper, the down-regulation strategy of WTs has to be mentioned.  ... 
doi:10.3390/app9061184 fatcat:gkkqsjxc3jfjddj4hjzm6prby4

Combined hydro-wind generation bids in a pool-based electricity market

Jorge L. Angarita, Julio Usaola, Jorge Martínez-Crespo
2009 Electric power systems research  
This paper presents a stochastic optimization technique that maximizes the joint profit of hydro and wind generators in a pool-based electricity market, taking into account the uncertainty of wind power  ...  However, wind resources are uncertain, and the final power delivered usually differs from the initial power committed.  ...  Period Optimal hydro bid [MW] Using EWPV [MW] Using HPWPV [MW] Optimal combined power bid [MW] t,up = t,down 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Hour 1 1667.8 1874.8 1867.8  ... 
doi:10.1016/j.epsr.2009.01.002 fatcat:h5r5yv63tfgf7mslrcrdf73stq

Stochastic Optimization of Microgrid Participating Day-Ahead Market Operation Strategy with Consideration of Energy Storage System and Demand Response

Huiru Zhao, Hao Lu, Bingkang Li, Xuejie Wang, Shiying Zhang, Yuwei Wang
2020 Energies  
In this article, an optimization strategy of a microgrid participating in day-ahead market operations considering demand responses is proposed, where the uncertainties of distributed renewable energy generation  ...  Microgrids with flexible regulation abilities provide an effective way to solve the problem of renewable energy connected to power grids.  ...  Results of the stochastic optimization will be scene-based; that is, show the optimal strategy in facing each scene.  ... 
doi:10.3390/en13051255 fatcat:k2eh744mbngvpf4ub76rqnllmu

Price-Taker Bidding Strategy under Price Uncertainty

Antonio J. Conejo, Francisco J. Nogales, Jose M. Arroyo
2002 IEEE Power Engineering Review  
This paper provides a framework to obtain the optimal bidding strategy of a price-taker producer.  ...  Index Terms-Bidding strategy, forecasting, MILP, pool-based electricity market, price-taker producer, self-scheduling.  ...  Other methods such as ordinal optimization [23] , Lagrangian relaxation [24] , stochastic optimization [25] , and Markov decision process [26] have also been applied to solve the optimal bidding strategy  ... 
doi:10.1109/mper.2002.4312581 fatcat:gqgqhtm4lfdz5dvzuaa2442rri

Price-taker bidding strategy under price uncertainty

A.J. Conejo, F.J. Nogales, J.M. Arroyo
2002 IEEE Transactions on Power Systems  
This paper provides a framework to obtain the optimal bidding strategy of a price-taker producer.  ...  Index Terms-Bidding strategy, forecasting, MILP, pool-based electricity market, price-taker producer, self-scheduling.  ...  Other methods such as ordinal optimization [23] , Lagrangian relaxation [24] , stochastic optimization [25] , and Markov decision process [26] have also been applied to solve the optimal bidding strategy  ... 
doi:10.1109/tpwrs.2002.804948 fatcat:rodywmsi3nd2nivl7ea6v2zgve

Capacity and control strategy design of isolated micro-grid with high renewable penetration

Aobo Zhou, Ruifeng Yan, Tapan K. Saha
2019 IEEE Transactions on Sustainable Energy  
As a result, the critical problem is to find an optimized PV-storage control strategy and capacity considering the techno-economic aspects, cost and reliability.  ...  Therefore, to reduce cost and CO2 emissions, renewable energy such as photovoltaic (PV) power is widely used.  ...  , while HOGA does not give due attention to start-up and shut-down processes of the dispatchable generators in the control strategy optimization.  ... 
doi:10.1109/tste.2019.2920274 fatcat:ofssr53dsfe2ndapmagu46bef4

Condition-Based Operational Optimization Of Industrial Combined Heat And Power Plants Under Time-Sensitive Electricity Prices

Egidio Leo, Sebastian Engell
2017 Zenodo  
This paper presents an approach to the inclusion of the degradation of the equipment due to ramp-up and shut-down in the optimization of the response of chemical and power plants to the variation of the  ...  operating strategy.  ...  Eng. [2] Mitra et al, Optimal scheduling of industrial combined heat and power plants under time-sensitive electricity prices. Energy 2013  ... 
doi:10.5281/zenodo.1004696 fatcat:ejsotcwssrh4hdurvxekfhqbyi

An Optimal Rejuvenation Strategy for Increasing Service Reliability of a VOIP System with Multiple Components

Vandana Gupta, Rahul Kumar
2017 International journal of mathematical, engineering and management sciences  
And an optimal software rejuvenation strategy is proposed which leads to increased system reliability. Numerical results are presented for the quantitative examination of the suggested model.  ...  In this paper, we extend our previous work by proposing an optimal software rejuvenation strategy which further contributes to improved system reliability.  ...  The aim of this example is to present the optimal rejuvenation strategy consisting of the value of the rejuvenation rate µRj, which maximizes the MTTF.  ... 
doi:10.33889/ijmems.2017.2.4-018 fatcat:jargxxmginefzjdq6vxrflda34

System level online power management algorithms

Dinesh Ramanathan, Rajesh Gupta
2000 Proceedings of the conference on Design, automation and test in Europe - DATE '00  
We propose an optimal online algorithm for power management.  ...  Next, we explore adaptive algorithms that try to shut down the system based on historical data. We provide a lower bound for any algorithm that uses adaptive methods to manage power.  ...  Now, the shut o strategy is simple: wait for k , 1 idle time units and then shut down the system.  ... 
doi:10.1145/343647.343867 fatcat:m745km2fjngwlpkghnfd3gc4ke

Stochastic optimal regulation service strategy for a wind farm participating in the electricity market

Baohua Zhang, Weihao Hu, Zhe Chen
2015 2015 IEEE Innovative Smart Grid Technologies - Asia (ISGT ASIA)  
In this paper, an optimal regulation service strategy for a wind farm to participate in the regulating market is proposed.  ...  Simulation results show the proposed strategy can increase the revenue of wind farms by leaving a certain amount of wind power for regulation service.  ...  Reference [6] proposes an optimal bidding strategy for trading wind power in the shortterm electricity market.  ... 
doi:10.1109/isgt-asia.2015.7387083 fatcat:raxxxhqgv5cctdzyynj2fonwym
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