2011 IEEE Power and Energy Society General Meeting最新文献_第5页

Payment cost minimization using Lagrangian relaxation and modified surrogate optimization approach 基于拉格朗日松弛和改进代理优化方法的支付成本最小化

2011 IEEE Power and Energy Society General Meeting Pub Date : 2011-07-24 DOI: 10.1109/PES.2011.6039191

Mikhail A. Bragin, Xu Han, P. Luh, Joseph H. Yan

{"title":"Payment cost minimization using Lagrangian relaxation and modified surrogate optimization approach","authors":"Mikhail A. Bragin, Xu Han, P. Luh, Joseph H. Yan","doi":"10.1109/PES.2011.6039191","DOIUrl":"https://doi.org/10.1109/PES.2011.6039191","url":null,"abstract":"In the Payment Cost Minimization (PCM) mechanism [4] payment costs are minimized directly, thus the payment costs that results from selected offers can be significantly reduced compared to the costs obtained by minimizing total bid costs. The PCM can be solved efficiently using standard LP software packages (e.g., CPLEX) only for a limited number of offers. Lagrangian relaxation (LR) has been a powerful technique to solve discrete and mixed-integer optimization problems. For complex problems, such as the PCM, the surrogate subgradient method is frequently used within Lagrangian relaxation approach to update multipliers (e.g., [6], [4]). In the surrogate subgradient approach a proper direction is obtained without fully minimizing the relaxed problem. This paper presents a modified Lagrangian relaxation and the surrogate optimization approach for obtaining a good feasible solution within a reasonable CPU time. The difficulty of the standard surrogate optimization method primarily arises due to the lack of prior knowledge about the optimal dual value, which is used in the definition of a step size. In order to overcome this difficulty, a new method is proposed. The main purpose of the modified surrogate subgradient approach is to obtain a “good” direction quickly and independently of the optimal dual value at each iteration. In this paper it is achieved by introducing a formula for updating the multipliers such that the exact minimization of the Lagrangian leads to a convergent result. Then an approximate formula for updating the multipliers is developed so that the exact optimization of the Lagrangian leads to a convergent result under certain optimality conditions. Lastly, the notion of the surrogate subgradient is used for ensuring the convergence within the reasonable CPU time. An analogue of the surrogate subgradient condition guarantees the convergence on the surrogate subgradient method. Numerical examples are provided to demonstrate the method's effectiveness.","PeriodicalId":159104,"journal":{"name":"2011 IEEE Power and Energy Society General Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129009899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Use of Common Information Model (CIM) in Electricity Market at California ISO 通用信息模型(CIM)在加州ISO电力市场中的应用

2011 IEEE Power and Energy Society General Meeting Pub Date : 2011-07-24 DOI: 10.1109/PES.2011.6039707

E. Haq, D. Haller, K. A. Rahman, B. Iverson

引用次数: 11

Improved coherency-based wide-band equivalents for real time digital simulators 改进的基于相干的宽带等效实时数字模拟器

2011 IEEE Power and Energy Society General Meeting Pub Date : 2011-07-24 DOI: 10.1109/PES.2011.6038933

Yuefeng Liang

引用次数: 10

Analysis of seasonal wind speed and wind power density distribution in Aimangala wind form at Chitradurga Karnataka using two parameter weibull distribution function 用双参数威布尔分布函数分析卡纳塔克邦Chitradurga Aimangala风场的季节风速和风力密度分布

2011 IEEE Power and Energy Society General Meeting Pub Date : 2011-07-24 DOI: 10.1109/PES.2011.6039587

B. G. Kumaraswamy, B. K. Keshavan, Y. Ravikiran

{"title":"Analysis of seasonal wind speed and wind power density distribution in Aimangala wind form at Chitradurga Karnataka using two parameter weibull distribution function","authors":"B. G. Kumaraswamy, B. K. Keshavan, Y. Ravikiran","doi":"10.1109/PES.2011.6039587","DOIUrl":"https://doi.org/10.1109/PES.2011.6039587","url":null,"abstract":"Modeling of wind speed variation is an essential requirement in the estimation of wind energy potential for a typical site. In this paper, the average wind from April 2007 to March 2008 in Aimangala at central dry zone part of Karnataka, India have been statistically analyzed to determine wind energy potential for electrical power generation by grouping the seasonal observations. We show that the wind speed distribution is represented by the typical two parameter weibull function for prediction of wind energy out put required for preliminary design and assessment of wind power plant. The shape and scale parameters of weibull function have been estimated seasonal basis to calculate the average wind speed and wind power density for the Aimangala station. The maximum power density was found to be 829.73 W/m2 in monsoon season and the minimum power density was found to be 186.15 W/m2 in winter season. The Weibull function using Weibull parameter estimated in this paper shown to provide more accurate prediction of average wind speed and average power density for the selected station. The seasonal variation of wind speed and wind density studied in this paper is useful to ensure optimum selection of wind turbine generator","PeriodicalId":159104,"journal":{"name":"2011 IEEE Power and Energy Society General Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130560766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 30

An open source platform for collaborating on smart grid research 一个用于智能电网研究合作的开源平台

2011 IEEE Power and Energy Society General Meeting Pub Date : 2011-07-24 DOI: 10.1109/PES.2011.6039829

R. Dugan, T. Mcdermott

引用次数: 386

Impact of demand response on distribution system reliability 需求响应对配电系统可靠性的影响

2011 IEEE Power and Energy Society General Meeting Pub Date : 2011-07-24 DOI: 10.1109/PES.2011.6039365

S. Mohagheghi, Fang Yang, B. Falahati

引用次数: 63

Supporting wind generation deployment with demand response 支持需求响应的风力发电部署

2011 IEEE Power and Energy Society General Meeting Pub Date : 2011-07-24 DOI: 10.1109/PES.2011.6039780

Anupama Kowli, Sean P. Meyn

{"title":"Supporting wind generation deployment with demand response","authors":"Anupama Kowli, Sean P. Meyn","doi":"10.1109/PES.2011.6039780","DOIUrl":"https://doi.org/10.1109/PES.2011.6039780","url":null,"abstract":"In this paper, we investigate how the demand-side of the electricity industry can provide a potential solution for the reliable integration of wind generation resources into power system operations. More specifically, we investigate how the consumers enrolled in demand response (DR) programs mechanisms which induce changes in load consumption through incentives or prices can provide a valuable demand-side reserve capacity which can help manage the unexpected deviations of actual wind generation from its forecast value. We also study how a levelized load profile can help accommodate wind generation on the system. Our analysis is based on a stochastic unit commitment model that explicitly represents the uncertainty in the day-ahead scheduling decisions using a two-stage stochastic program with recourse actions. We extend the standard formulation of this program to accommodate the outcomes the DR programs. Simulation results provide a proof of concept that DR-based reserve capacity is an effective mechanism to counter the volatility and uncertainty of wind resources. Also, studies indicate that load leveling can prove beneficial for systems with wind generation. Finally, our analysis raises some policy-related questions on the best possible ways to integrate wind generation into system operations and the risks that lie in wind integration without adequate backup from the demand-side.","PeriodicalId":159104,"journal":{"name":"2011 IEEE Power and Energy Society General Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130663260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 33

Smart distribution system research in EPRI's Smart Grid Demonstration Initiative EPRI智能电网示范计划中的智能配电系统研究

2011 IEEE Power and Energy Society General Meeting Pub Date : 2011-07-24 DOI: 10.1109/PES.2011.6039386

M. Wakefield

引用次数: 12

Analysis of a partially decentralized framework for operating future power systems 对未来电力系统部分分散运行框架的分析

2011 IEEE Power and Energy Society General Meeting Pub Date : 2011-07-24 DOI: 10.1109/PES.2011.6038971

Mingyang Li, P. Luh, E. Litvinov, Peng Zhang

{"title":"Analysis of a partially decentralized framework for operating future power systems","authors":"Mingyang Li, P. Luh, E. Litvinov, Peng Zhang","doi":"10.1109/PES.2011.6038971","DOIUrl":"https://doi.org/10.1109/PES.2011.6038971","url":null,"abstract":"In future power systems, the Smart Grid technologies will bring in a large number of new entities, which are different from those in the current systems in two major aspects: first, the entities are geographically distributed throughout the system with their detailed information not available to the system operator, and second, the entities tend to autonomously optimize their own benefits. In view of both aspects, it is difficult to use the current centralized framework to operate future systems. In this paper, we present and analyze a new partially decentralized framework and the corresponding mechanisms as one step from the current framework toward the future ones, and the focus is on the real time electricity markets with a dispatch cycle of five minutes. In each dispatch cycle, the system operator posts electricity price forecasts, and individual entities actively respond to the prices to dispatch themselves. The system-wide power imbalance is used as a correction term in the next dispatch cycle to iteratively update the price forecasts, so that system balance is maintained in the long term. The new framework can accommodate the large number of entities without knowing their detailed information, and enable the entities to achieve better economic benefits. Small examples are used to analyze our framework and to compare it with the current one.","PeriodicalId":159104,"journal":{"name":"2011 IEEE Power and Energy Society General Meeting","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123966855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Tradeoffs in planning renewable power generation entry to the electricity market 规划可再生能源发电进入电力市场的权衡

2011 IEEE Power and Energy Society General Meeting Pub Date : 2011-07-24 DOI: 10.1109/PES.2011.6039160

K. Hasan, T. Saha, M. Eghbal

引用次数: 7