Unit Commitment With Wind Power Generation

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Unit Commitment With Wind Power Generation

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Author :
language : en
Publisher:
Release Date : 2009

Unit Commitment With Wind Power Generation written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

We present a computational framework for integrating the state-of-the-art Weather Research and Forecasting (WRF) model in stochastic unit commitment/energy dispatch formulations that account for wind power uncertainty. We first enhance the WRF model with adjoint sensitivity analysis capabilities and a sampling technique implemented in a distributed-memory parallel computing architecture. We use these capabilities through an ensemble approach to model the uncertainty of the forecast errors. The wind power realizations are exploited through a closed-loop stochastic unit commitment/energy dispatch formulation. We discuss computational issues arising in the implementation of the framework. In addition, we validate the framework using real wind speed data obtained from a set of meteorological stations. We also build a simulated power system to demonstrate the developments.

Study Of Unit Commitment And Generation Flexibility Planning For Taiwan Power System With A High Wind Power Penetration

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Author : 張立佐
language : en
Publisher:
Release Date : 2017

Study Of Unit Commitment And Generation Flexibility Planning For Taiwan Power System With A High Wind Power Penetration written by 張立佐 and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.

A Unit Commitment Model With Demand Response And Wind Energy Integration

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Author : Abhishek Shivakumar
language : en
Publisher:
Release Date : 2012

A Unit Commitment Model With Demand Response And Wind Energy Integration written by Abhishek Shivakumar and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.

The output of renewable energy fluctuates significantly depending on weather conditions. In this work, unit commitment model is developed using the forward dynamic programming approach, to analyze the effect of integrating wind energy on the power generation system operation. The model obtains the time series for the operational state of generators that would maximize the profits of an electric power utility by taking into account both the forecast of output for the wind energy as well as the demand response of consumers. In this work, the case study of the island of Corvo in the Portuguese archipelago Azores is considered. This system consists of diesel generators with a plan to integrate wind energy into the system as well implement a Demand Response strategy to utilise the wind energy during hours of excess. The study suggests a power generation schedule for the existing power system on the island in order to lower the cost of operation. The viability of integrating wind energy was also confirmed and a generation schedule was produced. A demand response strategy was integrated into the model, using the water heating demand as a shiftable load. The water heater load-shifting was carried out using a real-time-pricing strategy to incentivize the utilization of electricity during hours of excess wind production. Several scenarios were studied and the impact of the demand response strategy was found to be significant. Finally, the effect of limiting the instantaneous wind penetration was studied. It was found that the total wind penetration is affected significantly by the restrictions on the instantaneous wind penetration only during days of high average wind speeds.

Electrical Power Unit Commitment

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Author : Yuping Huang
language : en
Publisher: Springer
Release Date : 2017-01-13

Electrical Power Unit Commitment written by Yuping Huang and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-01-13 with Business & Economics categories.

This volume in the SpringerBriefs in Energy series offers a systematic review of unit commitment (UC) problems in electrical power generation. It updates texts written in the late 1990s and early 2000s by including the fundamentals of both UC and state-of-the-art modeling as well as solution algorithms and highlighting stochastic models and mixed-integer programming techniques. The UC problems are mostly formulated as mixed-integer linear programs, although there are many variants. A number of algorithms have been developed for, or applied to, UC problems, including dynamic programming, Lagrangian relaxation, general mixed-integer programming algorithms, and Benders decomposition. In addition the book discusses the recent trends in solving UC problems, especially stochastic programming models, and advanced techniques to handle large numbers of integer- decision variables due to scenario propagation

Unit Commitment Methods To Accommodate High Levels Of Wind Generation

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Author : Alexander Charles Melhorn
language : en
Publisher:
Release Date : 2011

Unit Commitment Methods To Accommodate High Levels Of Wind Generation written by Alexander Charles Melhorn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.

The United State's renewable portfolio standards call for a large increase of renewable energy and improved conservation efforts over today's current system. Wind will play a major role in meeting the renewable portfolio standards. As a result, the amount of wind capacity and generation has been growing exponentially over the past 10 to 15 years. The proposed unit commitment method integrates wind energy into a scheduable resource while keeping the formulation simple using mixed integer programming. A reserve constraint is developed and added to unit commitment giving the forecasted wind energy an effective cost. The reserve constraint can be scaled based on the needs of the system: cost, reliability, or the penetration of wind energy. The results show that approximately 24% of the load can be met in the given test system, while keeping a constant reliability before and after wind is introduced. This amount of wind will alone meet many of the renewable portfolio standards in the United States.

Reliability And Risk Evaluation Of Wind Integrated Power Systems

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Author : Roy Billinton
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-15

Reliability And Risk Evaluation Of Wind Integrated Power Systems written by Roy Billinton and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-15 with Business & Economics categories.

The world is witnessing a rapid growth in wind and other renewable based electricity generation due to environmental concerns associated with electricity generation from the conventional sources. Wind power behaves quite differently than conventional electric power generating units due to its intermittent and diffuse nature. System planners and operators face the variability and uncertainty of wind power availability, and therefore, encounter considerable challenges in making decisions to maintain the adequacy and security of wind integrated power systems. This volume intends to bring out the original research work of researchers from academia and industry in understanding, quantifying and managing the risks associated with the uncertainty in wind variability in order to plan and operate a modern power system integrated with a significant proportion of wind power generation with an acceptable level of reliability. Accurate modeling of wind power variability and proper incorporation of the models in reliability and risk evaluation is very important for the planning and operation of electric power systems, and will play a crucial role in defining the requirement of various types of resources and services, such as storage and ancillary services in power systems.

Wind Power Integration

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Author : Brendan Fox
language : en
Publisher: IET
Release Date : 2007-06-20

Wind Power Integration written by Brendan Fox and has been published by IET this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-06-20 with Science categories.

This essential book examines the main problems of wind power integration and guides the reader through a number of the most recent solutions based on current research and operational experience of wind power integration.

Unit Commitment With Sub Hourly Generation And Ramp Constraints For Systems With Significant Renewables

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Author : Md Nazir
language : en
Publisher:
Release Date : 2015

Unit Commitment With Sub Hourly Generation And Ramp Constraints For Systems With Significant Renewables written by Md Nazir and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

"With significant growth in wind generation in the recent years, addressing the challenges related to integration of wind into power systems has become an important area of research. In power systems, generation and demand must always balance. There must also be enough reserve generation capacity to meet fluctuations in load and renewable sources. Based on the 24 hour demand and wind forecasts, system operators schedule the generation and reserve by solving a day ahead Unit Commitment (UC). During operations, the generators must respect the trajectory limits set by UC. While having too much reserve is expensive, having less of it is risky since increased load shedding or wind curtailment may occur. Moreover, due to high penetration levels of renewables, thermal generators (Natural gas/ coal/ combined cycle plants) experience frequent 'cycling' (ramp up or down of their power outputs) rather than operating at stable levels. The increased cycling has detrimental effects on the long term operational costs (order of millions) due to thermal stress and fatigue. While several recent studies address the above mentioned challenges, the focus has mainly been on hourly to daily operations, primarily since the UC traditionally deals with hourly time steps. However, at high penetration of renewables, several issues may arise in the sub-hourly time frame, mostly due to large wind ramps and increased sub-hourly ramping needs from thermal generators. Therefore, the thesis deals with the sub-hourly issues by addressing three main areas: (1) A detailed characterization of intra-hour wind behavior, (2) revisiting the sub-hourly ramp behavior and associated costs of the thermal generators, and (3) Incorporating the sub-hourly wind and thermal generator ramp behavior in the mixed integer linear formulation of the UC.To characterize wind variability in the intra-hour time frame, a general methodology is presented and its use is demonstrated on 5-minute interval wind power datasets from utilities. We noticed how wind distributions vary depending on generation levels and find the best fit distributions. Since balancing wind could call for significant cycling operations from thermal generators, we also consider the sub-hourly ramping characteristics of generators. To analyze the cost of cycling, a detailed review of findings from operational experiences and research studies has been presented.Finally, the thesis presents how the sub-hourly ramp characteristics of wind and thermal generators should be incorporated into power systems scheduling applications so that enough flexible capacity is allocated to deal with wind variability. Several implications of these sub-hourly modeling inside UC, such as avoiding dependence on stochastic programming and having access to intra-hour flexible capacity limits, are demonstrated through case studies." --

Electric Power Systems

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Author : João P. S. Catalão
language : en
Publisher: CRC Press
Release Date : 2017-12-19

Electric Power Systems written by João P. S. Catalão and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-12-19 with Science categories.

Electric Power Systems: Advanced Forecasting Techniques and Optimal Generation Scheduling helps readers develop their skills in modeling, simulating, and optimizing electric power systems. Carefully balancing theory and practice, it presents novel, cutting-edge developments in forecasting and scheduling. The focus is on understanding and solving pivotal problems in the management of electric power generation systems. Methods for Coping with Uncertainty and Risk in Electric Power Generation Outlining real-world problems, the book begins with an overview of electric power generation systems. Since the ability to cope with uncertainty and risk is crucial for power generating companies, the second part of the book examines the latest methods and models for self-scheduling, load forecasting, short-term electricity price forecasting, and wind power forecasting. Toward Optimal Coordination between Hydro, Thermal, and Wind Power Using case studies, the third part of the book investigates how to achieve the most favorable use of available energy sources. Chapters in this section discuss price-based scheduling for generating companies, optimal scheduling of a hydro producer, hydro-thermal coordination, unit commitment with wind generators, and optimal optimization of multigeneration systems. Written in a pedagogical style that will appeal to graduate students, the book also expands on research results that are useful for engineers and researchers. It presents the latest techniques in increasingly important areas of power system operations and planning.

Reliability Assessment Of Power Systems With Wind Power Generation

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Author : Shu Wang
language : en
Publisher:
Release Date : 2008

Reliability Assessment Of Power Systems With Wind Power Generation written by Shu Wang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.

Keywords: auto-regressive moving average, capacity value, Monte Carlo simulation, unit commitment, wind power generation, power system reliability.