A5072947959- Microgrid Control and Optimization
- HVDC Systems and Fault Protection
- Multilevel Inverters and Converters
- Smart Grid Energy Management
- Lightning and Electromagnetic Phenomena
- Smart Grid Security and Resilience
- Optimal Power Flow Distribution
- Electric Power System Optimization
- Electricity Theft Detection Techniques
- Power Quality and Harmonics
- Power System Optimization and Stability
- Real-time simulation and control systems
- Electromagnetic Compatibility and Noise Suppression
- Energy Load and Power Forecasting
- Magnetic Properties and Applications
- Photovoltaic System Optimization Techniques
- Electric Motor Design and Analysis
- Sensorless Control of Electric Motors
- Wind Turbine Control Systems
- Network Security and Intrusion Detection
- Power Systems and Renewable Energy
- High-Voltage Power Transmission Systems
- Power Systems Fault Detection
- Power Line Communications and Noise
- Islanding Detection in Power Systems
Southern Illinois University Carbondale
2010-2023
United States Department of the Army
2004
Harmonic Drive (Germany)
2003
West Virginia University
1987-1988
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Some of the most remarkable issues related to interharmonic theory and modeling are presented. Starting from basic definitions concepts, attention is first devoted sources. Then, assessment considered with particular problem frequency resolution computational burden associated analysis periodic steady-state waveforms. Finally, different kinds sources extension classical models developed for power...
This paper describes a reduced-order dynamic model for grid-connected fuel-cell power plant that is suitable preliminary stability assessment. Generic voltage and control loops are included. The applied to distributed utility uses fuel cells gas turbines investigate the nature magnitude of their interaction. studies presented in show effect mix between cell turbine generation on system stability. developed model, being simple, could provide useful tool planning generation.
Modern resolver-to-digital converters (RDCs) are typically implemented using DSP techniques to reduce hardware footprint and enhance system accuracy. However, in such implementations, both resolver sensor ADC channel unbalances introduce significant errors, particularly the speed output of tracking loop. The frequency spectrum error is variable depending on mechanical velocity. This paper presents design an autotuning filter based interpolation precomputed filters for a DSP-based RDC with...
This paper proposes a collaborative machine learning-based framework to detect cyber-attacks in power system, leading deviation the state variable behavior. Based on proposed architecture, three different methods, i.e., visualization, classification, and clustering, are employed compared find best one FDIA detection process. To this end, pre-processing is first stage. In second stage, patterns of vectors transferred into features. Hence, 24 statistical features, including measures central...
This article describes a reduced-order dynamic model for grid-connected fuel-cell power plant that is suitable preliminary stability assessment. Generic voltage and control loops are included. The applied to distributed utility uses fuel cells gas turbines investigate the nature magnitude of their interaction. studies presented in paper show effect mix between cell turbine generation on system stability. developed model, being simple, could provide useful tool planning generation.
This paper reviews the common practice and analytical models for representation of aggregate linear load in harmonic propagation distortion studies. Simulation results this demonstrate high sensitivity to model type used represent load. Comparison several literature shows a significant difference on system impedance around dominant resonance. The recommends comprehensive modeling approach that accounts all major components modern including electronic background distortion.
This paper documents the modeling of harmonic sources with nonlinear voltage-current characteristics such as transformers, iron-core reactors, rotating machines, arc furnaces, energy efficient lightings, and some household electronic appliances. The generating these apparatus are reviewed. Different techniques summarized suggestions for use different models also provided whenever possible.
This letter derives a closed-form analytical approximation of the output harmonic spectrum single-phase two-level inverter under action hysteresis current control. The approach consists first describing error as triangular signal variable duty cycle and frequency, subsequently, deriving Fourier transform complex envelope modulated signal. is given in terms Bessel functions kind. MATLAB/Simulink results on half-bridge are presented this to demonstrate validity accuracy proposed model.
Electrical load forecasting is one of the critical tasks that helps power utility companies in planning and operation as well energy managementsystem (EMS) controlling optimizing grid's performance. It guarantees system adequacy reliability by reducing gap between supply demand, it bolsters cybersecurity enabling false data detection security predicting peak load. This article aims to build an accurate long-term model based on deep learning (DL) algorithms. Initially, big-data analytics...
This paper describes the fundamental design of a novel power conditioner for medium size photovoltaic generators. The proposed employs several poles 3-level inverter, which, configured through current sharing reactors, can provide multi-level voltage. provides maximum point tracking and factor correction by direct control instantaneous value inverter output current. A PWM-gate is derived which utilizes multilevel form voltage effectively increases switching frequency without increasing its...
This paper presents a novel approach for treating the harmonic torque in permanent magnet motors at selected orders. The method is based on online estimation of motor flux. For this purpose, minimal parameter flux estimator (MPHFE) developed. MPHFE formulated such that inductance, resistance, and stator current its derivative are not necessary was achieved by forcing to zero through combined action field-oriented controller (FOC) feedforward controller. Subsequently, can be obtained directly...
A two-level optimization method is presented to find the optimal number and location of conventional protective devices be upgraded remote-controlled switches (RCSs) for an existing distribution network (DN). The effect distributed generation (DG) on this problem considered. In first level, a nonlinear binary program proposed maximize restored customers subject technical topological constraints. All feasible interchanges between ties involved in restoration, when fault occurs at all possible...
This article proposes a real-time multistage data-driven method to detect false data injected by an intruder. The proposed is based on accurate load model constructed deep neural networks (long short-term memory and gated recurrent unit) where historical demand along with extra weather features are employed formulate the problem as sequence of predictions build appropriate DNN model. A distinct feature that dramatically improves accuracy hyperparameter optimization (e.g., dropout rate, batch...
In this paper, a sliding control (SC) algorithm design is considered for damping local power oscillations in multiple area transmission system. The utilizes static Var compensators (SVC) to supply reactive the system stabilize event of faults. controller capable achieving full utilization SVC and insensitive parameter variations modeling errors. general, more than one needed effectively damp modes oscillation simulation results show effectiveness proposed interarea oscillations, enhancing...
To insure reliability in electrical networks, loads are supplied by more than one source. In this paper a transfer scheme using two Static Transfer Switches (STS) located remotely is presented for transferring the feeder load to an alternate source that out of phase from primary (preferred source). The objective have minimum disruption voltage terms dead time appearing as notches waveform. new proposed method requires only communication between STS units order achieve synchronization....
This paper describes an integrated control and protection scheme for the power conditioner used by medium rating grid-connected distributed generators storage devices. The proposed consists of two loops: a steady-state loop that achieves optimum harmonic output selective elimination low-order harmonics transient based on space vector methods enhances response generator provides overcurrent fault rejection. presents simulation studies device equipped with controller scheme. results these...
In this paper we consider the Libyan power system and its two interconnected areas. The interest in is because one of areas expected, near future, to host a significant quantity wind turbines bolster local conventional generation. A dynamic model presented for two-area including detailed aggregate generation controls. Simulation results show that certain disturbances velocity changes can potentially give rise undamped tie line oscillations. Subsequently, control method proposed deal with...
Monitoring of abnormal events in a distribution feeder by using single technique is challenging task. A number can cause unsafe operation, including high impedance fault (HIF), partial breakdown to cable insulation, and circuit breaker (CB) malfunction due capacitor bank de-energization. These are not detectable conventional protection schemes. In this paper, new identify proposed based on the complex Morlet wavelet (CMW) decision tree (DT) classifier. First, event detected CMW....
Medium-Voltage capacitor banks are widely used in distribution network applications such as power-factor correction, reducing energy consumption and power losses. However, using a switched bank can generate excessive transients to the electrical system. In this paper, following energization de-energization of obtained frequency dependent models network. Furthermore, detailed breaker model is employed enhance accuracy results since effects restrikes or prestrikes wear contacts leading...
The integration of Information and Communication Technologies (ICT) into the modern power system makes it a complicated cyber-physical (CPS). In this case, an adversary may find some loopholes, penetrate to CPS layer, compromise data, consequently result in security stability issues. paper, we proposed laboratory set up emulate attacker's behavior then detect injected false data. To end, RTU hardware software are used simulate typical SCADA system. A protocol analyzer is also employed...
This paper addresses the problem of controlling and modulating power flow long transmission lines using a series-connected solid-state synchronous voltage source (SVS). The design various control functions SVS is presented along with EMTP simulation studies. results from these studies demonstrate effectiveness proposed approach in regulating line and, also, providing modulation that can enhance dynamic transient performance line.