Showing 1-25 of 2,022 resultsfor "Index Terms":Time-varying Load
"Index Terms":Time-varying Load
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Research on adaptive synthesis dynamic load model based on multiple model ideology
2015 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)
Year: 2015 | Conference Paper |
Cited by: Papers (3)
Power load is an important element in power system. While, the traditional load model is fixed. So, when the load components change, the load model will be inappropriate. Based on the Multiple Model Theory, this paper proposes the Adaptive Synthesis Dynamic Load Model (ASDLM). In load modeling, the load model set is established, and every model in the model set has a weight. The time-varying class...Show More
Time-Varying Conservation Voltage Reduction Evaluation with Ground Truth Validation
2024 IEEE Power & Energy Society General Meeting (PESGM)
Year: 2024 | Conference Paper |
Accurate evaluation of the conservation voltage reduction (CVR) effect is paramount in achieving peak load reduction, conserving energy, and optimizing various power system control strategies related to CVR. Given the dynamic nature of loading conditions, it becomes crucial to develop a precise method for computing the time-varying CVR factor. Existing methods are solely validated on field measure...Show More
Time-Varying ADN Load Modeling Considering the Suppression of the Plateau Phenomenon and Continuous Low-Quality Data
Peng Wang;Zhenyuan Zhang;Chenxu Chen;Qi Huang;Ningyi Dai;Wei-Jen Lee
The time-varying parameter identification of load models has attracted broad attention when large amounts of intermittent distributed generations (DGs) and stochastic loads are integrated into the active distribution network (ADN). However, traditional time-varying load modeling approaches usually develop the load model with the composite load model (CLM) or the synthesis load model (SLM), which a...Show More
Medium and long term load forecasting method for distribution network with high penetration DGs
Mingxin Zhao;Wei Liu;Jian Su;Lijun Zhao;Xiaojing Dong;Wei Liu
2014 China International Conference on Electricity Distribution (CICED)
Year: 2014 | Conference Paper |
Cited by: Papers (10)
Middle and long term load forecasting is the essential basis for planning of distribution network. With high penetration DGs (distributed generation) integrated into network, the net load demand of HV/MV network become more complicated, load forecasting encounters greater challenge than ever. Volatility and intermittency of wind and solar power has greatly influenced the load characteristics. A ne...Show More
Short-term Load Forecasting Based on Time-Varying Feature Autoencoders
2024 4th International Conference on Smart Grid and Energy Internet (SGEI)
Year: 2024 | Conference Paper |
To improve the accuracy of short-term power load forecasting, a method based on time-varying feature autoencoders for power systems is proposed. This method optimizes the extraction and fusion of time-varying features from load time series data. Based on Fourier transform and inverse Fourier transform, the method performs autoencoding and decoding of periodic and trend components of load time seri...Show More
An investigation into defect induced excitations in rolling element bearings under dynamic radial load
2015 International Conference on Industrial Instrumentation and Control (ICIC)
Year: 2015 | Conference Paper |
Cited by: Papers (2)
External load on a bearing which supports the shaft is, normally, composed of static and time-varying components and are essentially dynamic in nature. The external load on a bearing is transferred to the housing in which the bearing is fixed through the elements of bearing viz., inner race, rolling elements and outer race. In the present work an investigation has been made to estimate the excitat...Show More
In order to illustrate daily variation of dynamic characteristics of the load for different types of load, time-varying aggregate load responses are derived in this paper. Hourly participation of different load categories and dynamic responses of individual load categories are necessary information for the derivation of time-varying aggregate load responses. The load participations of individual l...Show More
Review and Prospect of Research on Optimization Methods for Load Model Parameters
2024 8th International Conference on Smart Grid and Smart Cities (ICSGSC)
Year: 2024 | Conference Paper |
This study provides an overview of the field of power grid safety analysis and simulation technology, focusing on the load model and parameters of the Central China Power Grid. With the help of big data analysis, the study analyzes the patterns of load changes with seasons, regions, and other factors, and conducts precise load modeling and parameter optimization analysis. This study introduces the...Show More
Load forecasting techniques for networks with distributed generation (DG) sources
2016 Chinese Control and Decision Conference (CCDC)
Year: 2016 | Conference Paper |
Cited by: Papers (1)
This research discusses the medium and long term load forecasting techniques that are an essential basis for planning of such a distribution network taking into account the high penetration of DGs into network. The net load demand of HV/MV network has become more complicated, load forecasting encounters greater challenges than ever. Volatility and intermittency of DG sources such as wind and solar...Show More
Delay-dependent stability analysis for load frequency control systems with two delay components
2018 Chinese Control And Decision Conference (CCDC)
Year: 2018 | Conference Paper |
Cited by: Papers (3)
This paper investigates the delay-dependent stability of the LFC scheme considering two time-varying delays, a new less conservative delay-dependent stability criterion is proposed to study the delay margin of LFC system with PI controller based on Lyapunov-Krasovskii (LK) functional method and linear matrix inequality (LMI) technique. In the presented stability analysis procedure, the time deriva...Show More
Efficiency and cost evaluation of distribution systems based on multiple time points
2015 Modern Electric Power Systems (MEPS)
Year: 2015 | Conference Paper |
Phase balancing can offer planning engineers a low-cost means of reducing operating costs, improving efficiency in electric power systems. In general, utilities make phase balancing based on peak load by thinking that is the worst case scenario, but every time is not the case. In this paper, time varying phase balancing algorithm is proposed to investigate the effect of hourly phase balancing for ...Show More
Performance Realization for Gas Turbine System: Adaptive Constraint Regulation Framework
Peihao Du;Weimin Zhong;Hongyi Li;Linlin Li;Xin Peng;Kaixun He
2024 6th International Conference on Electronic Engineering and Informatics (EEI)
Year: 2024 | Conference Paper |
With the excessive consumption of fossil energy and the growing environmental pollution caused by its combustion, the gas turbine system (GTS) plays a key role in distributed renewable energy fields due to its versatility, efficiency and controllability. This paper focuses on the adaptive constraint regulation problem for the GTS with time-varying load disturbance, thereby facilitating exact speed...Show More
Integration of PV Distributed Renewable Energy Generation into Distribution System using Time-Varying Weather and Load Data
2021 IEEE 19th Student Conference on Research and Development (SCOReD)
Year: 2021 | Conference Paper |
Cited by: Papers (2)
The integration of distributed renewable energy generation (DREG) has attracted great attention due to its technical and economic benefits to both consumer and utilities sides. This paper presents the impact of integrating renewable Photovoltaic (PV) based DREG using time-varying weather and time-varying load model in IEEE 33-bus and IEEE 69-bus systems. 13-years historical solar irradiance data a...Show More
A time-variant load model based on smart meter data mining
2014 IEEE PES General Meeting | Conference & Exposition
Year: 2014 | Conference Paper |
Cited by: Papers (15)
This paper proposes a novel time-variant load model based on data-mining of a historical smart meter database. As part of the ongoing smart grid transformation, smart meters have been widely installed producing massive amount of data and information yet unexplored. One of the critical needs for distribution system operations and planning applications is enhanced modeling of the load, in particular...Show More
Deep Learning-Based Time-Varying Parameter Identification for System-Wide Load Modeling
Mingjian Cui;Mahdi Khodayar;Chen Chen;Xinan Wang;Ying Zhang;Mohammad E. Khodayar
IEEE Transactions on Smart Grid
Cited by: Papers (84)
The integration of uncertain power resources is causing more challenges for traditional load modeling research. Parameter identification of load modeling is impacted by a variety of load components with time-varying characteristics. This paper develops a deep learning-based time-varying parameter identification model for composite load modeling (CLM) with ZIP load and induction motor. A multi-moda...Show More
Determining PV Penetration for Distribution Systems With Time-Varying Load Models
A constant or voltage-dependent load model is usually assumed in most distributed generation (DG) planning studies. However, this paper proposes several different types of time-varying voltage-dependent load models to determine the penetration level of photovoltaic (PV) units in a distribution network. Here, a new analytical expression is first proposed to size a PV unit, which can supply active a...Show More
Robust Time-Varying Synthesis Load Modeling in Distribution Networks Considering Voltage Disturbances
Uncertain power sources are increasingly integrated into distribution networks and causes more challenges for the traditional load modeling. A variety of distributed load components present dynamic characteristics with time-varying parameters. Toward the end, this paper proposes a robust time-varying parameter identification (TVPI) method for synthesis load modeling in distribution networks, inclu...Show More
Reactive power optimization with time-varying fuzzy load demand for distribution systems
Proceedings. International Conference on Power System Technology
Year: 2002 | Conference Paper |
Cited by: Papers (3)
In this paper, an algorithm for reactive power optimization with time-varying fuzzy load model (RPOTF) for medium-high voltage distribution networks is presented. This algorithm simplifies the mathematical model of unknown control variables, determines the assumed switching time of control devices and then converts the time-varying optimization model into the same one as static optimization. This ...Show More
A Multiobjective Voltage Unbalance Factor for PV Hosting Capacity with Probabilistic ZIP Load Models
2018 IEEE Power & Energy Society General Meeting (PESGM)
Year: 2018 | Conference Paper |
Cited by: Papers (2)
This paper proposes a multiobjective voltage unbalance factor to estimate single-phase photovoltaic (PV) hosting capacity in 3-phase residential networks. This factor is derived from a combination of various components, including zero and negative-sequence voltage unbalance factors associated with the inherent variability and uncertainty of both loads and PV generation. A time-varying probabilisti...Show More
Dynamic synthesis load modeling approach based on load survey and load curves analysis
2008 Third International Conference on Electric Utility Deregulation and Restructuring and Power Technologies
Year: 2008 | Conference Paper |
Cited by: Papers (6)
A novel approach to build load model utilizing load curve analysis technique is presented in this paper. Load model has been widely used in power system simulation currently, and its precision directly decides the reliability of simulation result. Through developing load survey and load curves analysis, dynamic synthesis load model can be created and the problem of time-varying characters of load ...Show More
An analytical method to optimal allocation of wind based-DG considering time-varying load model in radial distribution systems
2015 2nd International Conference on Knowledge-Based Engineering and Innovation (KBEI)
Year: 2015 | Conference Paper |
Cited by: Papers (2)
This paper introduces an analytical expression for identify optimal size and location of wind-based distributed generation (DG) units so as to achieve the highest loss reduction in a distribution system. This paper considers a time-varying load model to find the penetration level of wind-based DG (wind DG) units in a distribution system. This recommended analytical method first size wind DG unit o...Show More
Composite generation and transmission system adequacy assessment with time varying loads using a contingency enumeration approach
IEEE WESCANEX 97 Communications, Power and Computing. Conference Proceedings
Year: 1997 | Conference Paper |
Cited by: Papers (5)
Adequacy evaluation of composite generation and transmission system can be performed in a variety of ways. In general, these techniques can be categorized as being either a Monte Carlo simulation approach or based on a contingency selection/evaluation procedure. This paper illustrates the development of an annual chronological load curve for each load bus in a composite generation and transmission...Show More
Research on Power Load Forecasting Model Based on Adaptive Feedback Loop Network
2023 IEEE 3rd International Conference on Electronic Technology, Communication and Information (ICETCI)
Year: 2023 | Conference Paper |
Cited by: Papers (1)
With the development of the power industry and the increasing use of distributed energy, short-term power load forecasting has become very important as a fundamental task of power system operation and planning. However, power loads are influenced by many factors and have complex nonlinear, and time-varying characteristics. It is challenging to capture dynamic changes using traditional forecasting ...Show More
Study on power systems transient stability considering traction power supply system measurement-based load model
JinXin Li;XinRan Li;Wei Deng;ZhenHua Xu;QianYong Liu;YongWang Zhang
2011 International Conference on Advanced Power System Automation and Protection
Year: 2011 | Conference Paper |
Cited by: Papers (7)
Owing to the characteristics of nonlinearity, asymmetry and stochastic volatility, electrified railway traction loads have arose some hazardous effects to security and stability, reactive power compensation and voltage control, power supply quality of power system. It has practical significance to research on the influence of traction loads to power system for ensuring security and stability of po...Show More
Reliability Evaluation of Distribution System Considering Composite Uncertainty Factors
2009 Asia-Pacific Power and Energy Engineering Conference
Year: 2009 | Conference Paper |
Cited by: Papers (2)
Uncertainty factors such as unavoidable weather conditions and aging of components with time-varying process are compositely considered in the paper in reliability evaluation of distribution system. A method of distribution system reliability evaluation is introduced by considering uncertainty factors combined with sequential Monte-Carlo simulation method. Reliability and economic indices of load ...Show More
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