WorldCat Identities

Hodge, Bri-Mathias

Overview
Works: 29 works in 30 publications in 1 language and 4,135 library holdings
Genres: Conference papers and proceedings 
Roles: Author
Publication Timeline
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Most widely held works by Bri-Mathias Hodge
Wind power forecasting error frequency analyses for operational power system studies : preprint by Anthony R Florita( )

1 edition published in 2012 in English and held by 260 WorldCat member libraries worldwide

The examination of wind power forecasting errors is crucial for optimal unit commitment and economic dispatch of power systems with significant wind power penetrations. This scheduling process includes both renewable and nonrenewable generators, and the incorporation of wind power forecasts will become increasingly important as wind fleets constitute a larger portion of generation portfolios. This research considers the Western Wind and Solar Integration Study database of wind power forecasts and numerical actualizations. This database comprises more than 30,000 locations spread over the western United States, with a total wind power capacity of 960 GW. Error analyses for individual sites and for specific balancing areas are performed using the database, quantifying the fit to theoretical distributions through goodness-of-fit metrics. Insights into wind-power forecasting error distributions are established for various levels of temporal and spatial resolution, contrasts made among the frequency distribution alternatives, and recommendations put forth for harnessing the results. Empirical data are used to produce more realistic site-level forecasts than previously employed, such that higher resolution operational studies are possible. This research feeds into a larger work of renewable integration through the links wind power forecasting has with various operational issues, such as stochastic unit commitment and flexible reserve level determination
Identifying wind and solar ramping events : preprint by Anthony R Florita( )

1 edition published in 2013 in English and held by 257 WorldCat member libraries worldwide

The impact of high wind power penetrations on hydroelectric unit operations in the WWSIS by Bri-Mathias Hodge( )

1 edition published in 2011 in English and held by 257 WorldCat member libraries worldwide

The Western Wind and Solar Integration Study (WWSIS) investigated the operational impacts of very high levels of variable generation penetration rates (up to 35% by energy) in the western United States. This report examines the impact of this large amount of wind penetration on hydroelectric unit operations. Changes in hydroelectric unit operating patterns are examined both for an aggregation of all hydro generators and for select individual plants. The cost impacts of maintaining hydro unit flexibility are assessed and compared for a number of different modes of system operation
The impact of high wind power penetration on hydroelectric unit operations : preprint by Bri-Mathias Hodge( )

1 edition published in 2011 in English and held by 255 WorldCat member libraries worldwide

The Western Wind and Solar Integration Study (WWSIS) investigated the operational impacts of very high levels of variable generation penetration rates (up to 35% by energy) in the western United States. This work examines the impact of this large amount of wind penetration on hydroelectric unit operations. Changes in hydroelectric unit operating unit patterns are examined for an aggregation of all hydro generators. The cost impacts of maintaining hydro unit flexibility are assessed and compared for a number of different modes of system operation
Wind power forecasting error distributions : an international comparison : preprint( )

1 edition published in 2012 in English and held by 255 WorldCat member libraries worldwide

Wind power forecasting is expected to be an important enabler for greater penetration of wind power into electricity systems. Because no wind forecasting system is perfect, a thorough understanding of the errors that do occur can be critical to system operation functions, such as the setting of operating reserve levels. This paper provides an international comparison of the distribution of wind power forecasting errors from operational systems, based on real forecast data. The paper concludes with an assessment of similarities and differences between the errors observed in different locations
Forecastability as a design criterion in wind resource assessment : preprint by Jie Zhang( )

1 edition published in 2014 in English and held by 249 WorldCat member libraries worldwide

Solar ramping distributions over multiple timescales and weather patterns by Bri-Mathias Hodge( )

1 edition published in 2011 in English and held by 248 WorldCat member libraries worldwide

Impact of distribution-connected large-scale wind turbines on transmission system stability during large disturbances : preprint by Y. C Zhang( )

1 edition published in 2014 in English and held by 247 WorldCat member libraries worldwide

This work examines the dynamic impacts of distributed utility-scale wind power during contingency events on both the distribution system and the transmission system. It is the first step toward investigating high penetrations of distribution-connected wind power's impact on both distribution and transmission stability
The distribution of wind power forecasting errors from operations systems by Bri-Mathias Hodge( )

1 edition published in 2011 in English and held by 247 WorldCat member libraries worldwide

The value of improved short-term wind power forecasting by Bri-Mathias Hodge( )

1 edition published in 2015 in English and held by 247 WorldCat member libraries worldwide

Short-term load forecasting error distributions and implications for renewable integration studies : preprint by Bri-Mathias Hodge( )

1 edition published in 2013 in English and held by 247 WorldCat member libraries worldwide

Load forecasting in the day-ahead timescale is a critical aspect of power system operations that is used in the unit commitment process. It is also an important factor in renewable energy integration studies, where the combination of load and wind or solar forecasting techniques create the net load uncertainty that must be managed by the economic dispatch process or with suitable reserves. An understanding of that load forecasting errors that may be expected in this process can lead to better decisions about the amount of reserves necessary to compensate errors. In this work, we performed a statistical analysis of the day-ahead (and two-day-ahead) load forecasting errors observed in two independent system operators for a one-year period. Comparisons were made with the normal distribution commonly assumed in power system operation simulations used for renewable power integration studies. Further analysis identified time periods when the load is more likely to be under- or overforecast
Wind power forecasting error distributions over multiple timescales by Bri-Mathias Hodge( )

1 edition published in 2011 in English and held by 246 WorldCat member libraries worldwide

The impact of improved solar forecasts on bulk power system operations in ISO-NE : 4th Solar Integration Workshop by Carlo Brancucci Martinez-Anido( )

1 edition published in 2014 in English and held by 246 WorldCat member libraries worldwide

Analyzing effects of turbulence on power generation using wind plant monitoring data : preprint by Jie Zhang( )

1 edition published in 2014 in English and held by 245 WorldCat member libraries worldwide

In this paper, a methodology is developed to analyze how ambient and wake turbulence affects the power generation of a single wind turbine within an array of turbines. Using monitoring data from a wind power plant, we selected two sets of wind and power data for turbines on the edge of the wind plant that resemble (i) an out-of-wake scenario (i.e., when the turbine directly faces incoming winds) and (ii) an in-wake scenario (i.e., when the turbine is under the wake of other turbines). For each set of data, two surrogate models were then developed to represent the turbine power generation (i) as a function of the wind speed; and (ii) as a function of the wind speed and turbulence intensity. Support vector regression was adopted for the development of the surrogate models. Three types of uncertainties in the turbine power generation were also investigated: (i) the uncertainty in power generation with respect to the published/reported power curve, (ii) the uncertainty in power generation with respect to the estimated power response that accounts for only mean wind speed; and (iii) the uncertainty in power generation with respect to the estimated power response that accounts for both mean wind speed and turbulence intensity
Wind power forecasting error distributions over multiple timescales : preprint by Bri-Mathias Hodge( )

1 edition published in 2011 in English and held by 243 WorldCat member libraries worldwide

Wind forecasting is an important consideration in integrating large amounts of wind power into the electricity grid. The wind power forecast error distribution assumed can have a large impact on the confidence intervals produced in wind power forecasting. In this work we examine the shape of the persistence model error distribution for ten different wind plants in the Electric Reliability Council of Texas (ERCOT) system over multiple timescales. Comparisons are made between the experimental distribution shape and that of the normal distribution. The shape of the distribution is found to change significantly with the length of the forecasting timescale. The Cauchy distribution is proposed as a model distribution for the forecast errors and model parameters are fitted. Finally, the differences in confidence intervals obtained using the Cauchy distribution and the normal distribution are compared
Impact of increasing distributed wind power and wind turbine siting on rural distribution feeder voltage profiles : preprint by A Allen( )

2 editions published in 2013 in English and held by 237 WorldCat member libraries worldwide

Analyzing the impacts of variable renewable resources on California net-load ramp events by Bing Huang( )

1 edition published in 2018 in English and held by 134 WorldCat member libraries worldwide

Examining the variability of wind power output in the regulation time frame : preprint by Bri-Mathias Hodge( )

1 edition published in 2012 in English and held by 2 WorldCat member libraries worldwide

This work examines the distribution of changes in wind power for different time scales in the regulation time frame as well as the correlation of changes in power output for individual wind turbines in a wind plant
A comparison of wind power and load forecasting error distributions : preprint( )

1 edition published in 2012 in English and held by 2 WorldCat member libraries worldwide

The introduction of large amounts of variable and uncertain power sources, such as wind power, into the electricity grid presents a number of challenges for system operations. One issue involves the uncertainty associated with scheduling power that wind will supply in future timeframes. However, this is not an entirely new challenge; load is also variable and uncertain, and is strongly influenced by weather patterns. In this work we make a comparison between the day-ahead forecasting errors encountered in wind power forecasting and load forecasting. The study examines the distribution of errors from operational forecasting systems in two different Independent System Operator (ISO) regions for both wind power and load forecasts at the day-ahead timeframe. The day-ahead timescale is critical in power system operations because it serves the unit commitment function for slow-starting conventional generators
Integration costs: Are they unique to wind and solar energy? : preprint( )

1 edition published in 2012 in English and held by 2 WorldCat member libraries worldwide

Over the past several years, there has been considerable interest in assessing wind integration costs. This is understandable because wind energy does increase the variability and uncertainty that must be managed on a power system. However, there are other sources of variability and uncertainty that also must be managed in the power system. This paper describes some of these sources and shows that even the introduction of base-load generation can cause additional ramping and cycling. The paper concludes by demonstrating that integration costs are not unique to wind and solar, and should perhaps instead be assessed by power plant and load performance instead of technology type
 
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Languages
English (21)