A5082252730- Power System Optimization and Stability
- Optimal Power Flow Distribution
- Power Systems Fault Detection
- Power System Reliability and Maintenance
- Lightning and Electromagnetic Phenomena
- Smart Grid Security and Resilience
- Microgrid Control and Optimization
- HVDC Systems and Fault Protection
- Smart Grid Energy Management
- Electric Power System Optimization
- Real-time simulation and control systems
- Islanding Detection in Power Systems
- Power Quality and Harmonics
- Power Systems and Technologies
- Thermal Analysis in Power Transmission
- Electromagnetic Compatibility and Noise Suppression
- Multilevel Inverters and Converters
- Power Transformer Diagnostics and Insulation
- Electrical Fault Detection and Protection
- High-Voltage Power Transmission Systems
- Smart Grid and Power Systems
- Advanced Electrical Measurement Techniques
- Wind Turbine Control Systems
- HIV, Drug Use, Sexual Risk
- Frequency Control in Power Systems
Georgia Institute of Technology
2015-2024
Georgia Power (United States)
2017-2024
Institute of Electrical and Electronics Engineers
2007-2016
Faculty of 1000 (United States)
2013-2016
Gorgias Press (United States)
2013-2016
Kaken Pharmaceutical (Japan)
2016
King Abdulaziz University
2014
Quality and Reliability (Greece)
2005
Sigma Xi
2003
National Technical University of Athens
2003
This paper summarizes the technical activities of Task Force on Power System Dynamic State and Parameter Estimation. was established by IEEE Working Group Estimation Algorithms to investigate added benefits dynamic state parameter estimation for enhancement reliability, security, resilience electric power systems. The motivations engineering values (DSE) are discussed in detail. Then, a set potential applications that will rely DSE is presented discussed. Furthermore, unified framework...
An efficient, timely, and accurate state estimation is a prerequisite for most energy management system (EMS) applications in power control centers. The emerging wide-area measurement systems (WAMSs) offer new opportunities developing more effective methods to monitor dynamics online. Recently, alternative have caught much attention. Due the nonlinearity of transition observation equation, linearization Jacobian matrix calculation are indispensible existing estimation. This makes WAMS' high...
This paper presents a new smart grid infrastructure for active distribution systems that will allow continuous and accurate monitoring of system operations customer utilization electric power. The allows complete array applications. discusses four specific applications: a) protection against downed conductors; b) load levelization; c) loss minimization; d) reliability enhancement.
Power system dynamic state estimation (DSE) remains an active research area. This is driven by the absence of accurate models, increasing availability fast-sampled, time-synchronized measurements, and advances in capability, scalability, affordability computing communications. paper discusses advantages DSE as compared to static estimation, implementation differences between two, including measurement configuration, modeling framework support software features. The important roles are...
Dynamic state estimation (DSE) accurately tracks the dynamics of a power system and provides evolution in real-time. This paper focuses on control protection applications DSE, comprehensively presenting different facets challenges arising modern systems. It is demonstrated how these are effectively addressed with DSE-enabled solutions. As precursors to solutions, reformulation DSE considering both synchrophasor sampled value measurements comprehensive comparisons observers have been...
This paper presents investigations into various aspects of how plug-in hybrid electric vehicles (PHEVs) could impact the power system. The investigation is focused on impacts system infrastructure and primary fuel utilizations due to PHEV charging. presented in terms examples typical systems. Methodologies are for computing loss life distribution transformers, which sets basis needed expansion or upgrades systems with penetration. In addition, a methodology evaluating source utilization...
The introduction of the microprocessor-based numerical relay in 1980s resulted multifunctional, multidimensional, communications-enabled complex protection systems for zone and system protection. increasing capabilities this technology created new unintended challenges: 1) complexity has increased selecting coordinated settings is a challenge leading to occasional miscoordination; 2) functions still rely on small number measurements (typically three voltages currents) limiting ability...
This paper proposes an advanced distribution management system (DMS) that a) monitors each component and performs protection functions using a dynamic state estimation, b) the estimated states are transmitted to DMS where real time model of entire feeder is synthesized, c) uses perform upper level optimization (operations planning) lower (real control) via hierarchical procedure; d) applies proper controls operate at optimal points. The proposed approach for protection, operations planning,...
Abstract This paper presents a roadmap to the application of AI techniques and big data (BD) for different modelling, design, monitoring, manufacturing operation purposes superconducting applications. To help superconductivity researchers, engineers, manufacturers understand viability using BD as future solutions challenges in superconductivity, series short articles are presented outline some potential applications solutions. These futuristic routes their materials/technologies considered...
Increased penetration of small modular generation technologies interconnected to distribution systems forms a new type power system, the micro-grid. Micro grids can provoke several technical problems in operation grid, or face challenges their and control, when operated as autonomous systems. In this paper main related issues are discussed together with DGs modelling requirements for analysis.
A power system state estimation based on (a) multiphase model, (b) voltage and current waveform measurements, (c) synchronized measurements (d) multifrequency model (i.e. the approach accounts for distortion or harmonics) is formulated. The paper focuses following: modeling, implementation, observability performance. Sensitivity analysis used to show how transmission line modeling measurement schemes affect performance of harmonic estimation. overall described in terms confidence level...
This paper addresses the problem of computing ground potential rise grounding systems during transients. Finite element analysis is employed to model constituent parts a system. Short lengths earth embedded electrodes are characterized as transmission lines with distributed inductance, capacitance and leakage resistance earth. Leakage accurately computed method moments. The other parameters finite element, namely inductance capacitance, from utilizing Maxwell's equations. modeling enables...
Control room operators are faced with frequent security-economy decision-making situations necessitated by stressed system operating conditions, and there is increased need for decision-support tools. Although probabilistic methods promising in this regard, they have been mainly used planning environments. This task force paper explores their use operational decision-making, comparing them to the more traditional deterministic approach. Two examples facilitate comparison via overload low...
A multiphase power flow model and state estimation for distribution systems are formulated solution methods presented. The is based on fully asymmetric modeling of the system. uses this in conjunction with synchronized measurements. method provides an estimate total electric load each circuit without requirement knowledge individual loads along circuit. paper addresses following issues: (a) modeling; (b) implementation; (c) observability; (d) performance. overall performance described terms...
A method for the simulation of composite power system is proposed purpose evaluating probability distribution function circuit flows and bus voltage magnitudes. The consists two steps. First, given probabilistic electric load model, total generation buses computed. Second, magnitudes are expressed as linear combinations injections at buses. This relationship allows computation functions incorporates major operating practices such economic dispatch nonlinearities resulting from flow...
This paper presents a linear programming based methodology for corrective controls computations. The computes adjustments of unit real power output, VAR source transformer tap settings, capacitor/reactor switching, branch switching or line sectionalization, and if necessary, load shedding. A previous publication presented the basic algorithm computing continuous such as generator power, setting, etc. addresses problem incorporating discrete switching/sectionalization into overall procedure....
Series compensated transmission lines challenge legacy protection schemes. In this paper, a dynamic state estimation based (EBP) method is proposed to address these challenges. The requires GPS synchronized measurements at both ends of the line and high-fidelity model zone. paper presents zone its impact on performance scheme. Numerical simulations show that can correctly identify faults, independently position type. also compares versus functions such as distance differential protection....
This paper proposes an effective scheme for real-time operation and protection of microgrids based on the distributed dynamic state estimation (DDSE) that is applied to a single renewable energy resource (DER) or other components. First, DDSE can be used setting-less component applies under with measurements models component. Based results, well-known chi-square test yields confidence level quantifies goodness fit measurements, indicating health status With this approach, DERs in protected...
Accurate fault locating minimises labour and outage time. Efforts to increase the accuracy of methods are on‐going. In this study, a dynamic state estimation‐based (EBFL) method is proposed. Best implementation requires GPS synchronised sample value measurements at both ends line. The estimator operates on sampled values using detailed model line, which includes location as state. Specifically, line represented multi‐section transmission model, inclusive phase conductor type size, shield...
This paper presents a methodology for simultaneous transfer capability analysis based on probabilistic approach. All areas in large scale power system are divided into three groups: (a) study area, (b) participating areas, and (c) external which have no direct transactions or they fixed with the area. A performance index contingency selection procedure is applied within to rank those contingencies will affect capability. The ranking order utilized by variation of Wind Chime diagram selected...
Several important research areas in electric power quality are described. Aspects of categorized as fundamental concepts, modeling and analysis, measurement instrumentation, sources, solutions, effects, educational issues. The goals to identify the high-priority stimulate interest this topic.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
This paper provides a methodology to extract the dynamic real time model of an electric power system using phasor measurement unit (PMU) data (GPS-synchronized) and other SCADA that are available in substations. In addition typical voltage current measurements, PMU include frequency rate change frequency. Such raw form, as time-stamped instantaneous values, or, case voltages currents, computed at fundamental A state estimator is conceptually presented filters all transient swings time. means...
This paper presents an investigation into aspect of how plug-in hybrid electric vehicles (PHEVs) could impact the power system. The is focused on additional electrical load PHEV charging will have primary energy source utilization and subsequent environmental air pollution (EAP) as emissions are transferred from vehicle tailpipes to powerplants. A methodology presented for evaluating utilization, considering all operating constraints system, well as, realistic operation PHEVs. Examples...
A novel predictive generator out-of-step protection and transient stability monitoring scheme is presented. It based on real-time dynamic of the system, enabled by a distributed state estimator (DSE). DSE utilizes local synchronized nonsynchronized measurements provides evolution system's at rates 60 times/s. The model then utilized to evaluate energy function Lyapunov's direct method, estimate barrier, characterize its stability. two major components are: calculation center oscillations...