Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 53 for “"Load model"”.
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A RESIDENTIAL ELECTRICAL LOAD MODEL
… develops a time varying residential electric load model based on the philosophy that the availability of people to turn on electrical appliances and their tendency to do so at particular times are significant factors in determining the time varying nature of the residential load. Additional …
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A stochastic live load model for buildings.
Massachusetts Institute of Technology, Dept. of Civil Engineering. Thesis. 1972. Ph. D.
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Improvements to power system dynamic load model parameter estimation
… engineers and researchers. Accurate dynamic models are required, but aggregate load models are an area of weakness. Measurement-based system identification methods based on least-squares minimization have difficulty uniquely identifying the model parameters because the models exhibit …
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Parameter estimation of a composite load model using a hybrid approach
Accurate dynamic load models are needed to ensure meaningful transient simulation results. We investigate the use of a composite load (CLOD) model to represent an aggregate load. Two algorithms for the parameter estimation of the CLOD model are presented and analyzed. The first uses nonlinear …
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Validation of a Simplified Building Cooling Load Model Using a Complex Computer Simulation Model
… for predicting cooling, heating and electrical loads for facilities. Simulation models have been validated throughout the years by comparing simulation results to actual measured values. The simulations have become more accurate as approaches were changed to be more comprehensive in their …
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A nonlinear wave load model for extreme and fatigue responses of offshore floating wind turbines
… prediction of nonlinear hydrodynamic wave loads and the resulting nonlinear motion and tether tension is of crucial importance in the design of floating wind turbines. A new theoretical framework is presented for analyzing hydrodynamic forces on floating bodies which is potentially …
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Utilization of Genetic Algorithms and Constrained Multivariable Function Minimization to Estimate Load Model Parameters from Disturbance Data
… and planners must ensure that power system models are accurate and capable of replicating system disturbances. Traditionally, load models were represented as static ZIP models; however, NERC has recently required that planners model the transient dynamics of motor loads to study their effect …
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Voltage collapse prediction for interconnected power systems
… to voltage collapse based on reactive power load demand. The load characteristics are considered in this research. Different voltage dependent loads are proposed in order to be used instead of the constant load model. The effect of induction machine load is considered in this study. The load …
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Incorporating time and statistical variations in load modelling for reliability and customer interruption costs evaluations
… Firstly to investigate different types of load modelling in reliability or CIC [customer interruption costs] evaluations to obtain an understanding on how these evaluations are performed and identifying the benefits or limitations of existing models. Secondly to develop several load …
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Dynamic Load Modeling from PSSE-Simulated Disturbance Data using Machine Learning
Load models have evolved from simple ZIP model to composite model that incorporates the transient dynamics of motor loads. This research utilizes the latest trend on Machine Learning and builds reliable and accurate composite load model. A composite load model is a combination of static (ZIP) model …
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Analysis and comparison of the South African and Eurocode live load models for railway bridges
… Transport Services (SATS) and Eurocode (EC) live load models for railway bridges. The study is specifically concerned with the critical load effects of shear and bending moment. The load models are simulated as moving loads over the full length of simply supported and continuous railway systems …
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Composite load modeling for power systems: Model reduction, identification, and application to conservation voltage reduction
Load modeling is essential to power system stability analysis, optimization, and controller design as shown in many research. Although the importance of load modeling is recognized by power system researchers and engineers, obtaining an accurate load model remains challenging due to the large …
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Power quality impacts of the low carbon evolution within modern distribution networks
… investigations. From this a collection of static load models are composed, each specified in polynomial form. This process includes the development of a novel approach for characterising harmonic current phasors, expressed in cartesian form, as functions of a modulating parameter, either supply …
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Review of South African live load models for traffic loading on bridge and culvert structures using weigh-in-motion (WIM) data
… weigh-in-motion (WIM) sensors to calculate the load effects on single lane, simply supported structures spanning up to 30m. The main objective was to compare the load effects caused by the recorded vehicles with those calculated using TMH7 Part 2 and the alternative live load models proposed in …
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Shear Reliability Analysis of Reinforced Concrete Bridges Designed to TMH7
… bridges in South Africa. Its normal traffic load model (NA loading), based on the outdated BS5400 design code and 1972 traffic loads, has not been updated to account for the changes in traffic demands. Thereby, the validity of TMH7 in simulating the current traffic demands is in question. …
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Comparative Analysis of Machine Learning Models for ERCOT Short Term Load Forecasting
… machine learning (ML) and deep learning (DL) models for short-term load forecasting (STLF) in the Electric Reliability Council of Texas (ERCOT) grid. A dual comparative approach is employed, evaluating models based on temporal features alone as well as in combination with actual and forecasted …
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Load Modeling using Synchrophasor Data for Improved Contingency Analysis
… for energy and the growing complexity of the loads are two of the main challenges faced by the power grid. In order to prepare for contingencies and maintain a secure state, power engineers must perform simulations using steady state and dynamic models of the system. The results from the …
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Forced vibration and hygrothermal analysis of composite laminated beams under the action of moving loads
… glass/epoxy composite beams subjected to moving loads in a hygrothermal environment is carried out using the general purpose finite element program ANSYS. The moving load model and the hygrothermal incorporation are validated separately by reproducing results available in the literature. The …
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Daily experiences and psychobiological health in adolescents
… tear’ on the body, a process known as allostatic load. Allostatic load refers to the cumulative effects of experiences on health and has been measured in predominantly adult populations when the effects of experiences have manifested over time. However, adolescence is a sensitive and dynamic …
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STRUCTURAL ASSESSMENT OF MULTIPLE STORY STEEL BUILDINGS SUBJECTED TO BLAST LOADS
… Story Steel Buildings Subjected to Blast Loadsby: ANDREW APPELBAUMAbstract This research has been carried out in order to analyze the effects of blast loads on lateral force resisting systems in hardened multistory steel buildings. The results obtained are targeted towards improving the …
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