The extensive usage of open communication networks in power system control causes inevitable time delays. This paper studies impacts such delays on the stability one-area and two-area load frequency (LFC) systems proposes an analytical method to determine delay margins, upper bound for stability. proposed first eliminates transcendental terms characteristic equation LFC without making any approximation transforms into a regular polynomial. key result elimination process is that real roots...

In this paper, a new type of static compensator (STATCOM) is proposed. This STATCOM constructed by cascading several identical full-bridge (H bridge) voltage-source inverters (VSIs). A so-called phase-shifted sinusoidal pulsewidth modulation (SPWM) unipolar voltage switching scheme applied to control the devices each VSI. The harmonics in current caused DC ripple rejected method developed paper. As result, size inductor and capacitors can be further reduced. very effective startup procedure...

This paper provides an of overview local bifurcation theory and its application to power system voltage stability analysis. The qualitative behavior dynamics as modeled by differential-algebraic equations is discussed, followed a summary the concepts tools for analysis from equilibria. Computational methods locating classifying points they have been applied in are reviewed. Several examples given.

A method of calculating available transfer capability and the exploration first order effects certain power system network variables are described. The Federal Energy Regulatory Commission has ordered that bulk electrical control areas must provide to market participants a "commercially viable" for import, export throughput energy. practical deriving this utilizing both linear nonlinear flow analysis methods is developed acknowledges thermal voltage limitations. incremental derived by...

This work describes MATLAB/Simulink implementation of three induction motor tests, namely dc, no-load, and blocked-rotor tests performed to identify equivalent circuit parameters. These simulation models are developed support enhance electric machinery education at the undergraduate level. The proposed have been successfully integrated into courses Drexel University, Philadelphia, PA, Nigde Nigde, Turkey.

In this paper, we present an efficient algorithm to compute singular points and singularity-induced bifurcation of differential-algebraic equations for a multimachine power-system model. Power systems are often modeled as set (DAE) whose algebraic part brings singularity issues into dynamic stability assessment power systems. Roughly speaking, the that satisfy equations, but at which vector field is not defined. terms dynamics, around points, generator angles (the natural states variables)...

This paper discusses a transmission-line modeling approach that incorporates available ambient temperature information. Several proposed line techniques are studied and include distributed lumped parameter models. In order to capture the nonuniformity of parameters caused by gradients, model with multiple nonuniform segments is also proposed. An automated tool has been developed obtain appropriate segmentation values each segment, given set measurements their locations along line.

A systematic approach to the construction of stochastic models electric power systems for small disturbance stability analysis is presented. In this study, cumulative effects small-magnitude random fluctuations electrical loads are considered as sources eventual loss stability, and a security measure derived determine small-disturbance limits system. The system were tested on 30-bus compared according relative load proposed measure.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML"...

This paper presents a summary of guidelines for modeling power electronics in various engineering applications. document is designed use by engineers who need to simulate electronic devices and sub-systems with digital computer programs. The guideline emphasizes the basic issues that are critical successfully interface between utility or industrial system. considerations addressed this generic all independent computational tool. However, purposes illustration, simulation examples presented...

In this paper, a new power line conditioning system is proposed. This constructed by flying capacitor multilevel VSC (voltage source converter) and two reactors. The phase-shift SPWM (sinusoidal pulse width modulation) switching scheme applied to control the devices of converter. Due converter, applicable distribution systems or industrial applications. reactive compensation, harmonic suppression load balancing functions conditioner are analyzed. A novel effective startup procedure proposed...

In this paper, a new power-line conditioning system is proposed. This constructed by flying-capacitor multilevel voltage-source converter (VSC) and two reactors. The phase-shift sinusoidal pulsewidth modulation switching scheme applied to control the devices of converter. Due VSC converter, applicable distribution systems or industrial applications. reactive power compensation, harmonic suppression load-balancing functions conditioner are analyzed. A novel effective startup procedure...

The Hybrid Power System Test-bed currently being constructed at NAVSEA Philadelphia is designed to serve as a developmental platform for the evaluation of hybrid power and propulsion options related unmanned surface vehicles (USVs). Prior component integration, Matlab/Simulink model test-bed was created simulate system interactions assist in detailed electrical design. A reduced order required before analysis individual components performed. This paper describes evolution work date...

Datacenters, being major consumers of power, can play an important role in the efficient operation electrical grids. This paper develops optimization framework to allow datacenters operate as controllable load resources within demand dispatch regime, a response (DR) program which incentives are designed induce lower electricity use not just during times high prices but also when reliability local grid is jeopardized or supply and unbalanced. Assuming availability geographically distributed...

An increasing presence of renewable energy forms, due to environmental and socio-economic reasons, in the electric power industry necessitates an assessment impact these sources, on a conventional utility. This incorporates stochastic theory investigate security stability wind conversion system (WECS) electrical utility quantify limits such system's operation. paper presents model that captures uncertainties load at generator bus, method approximates randomness experienced by system. Future...

This paper presents a unique facility capable of exhibiting the operation modern day power system energy management systems (EMS). The purpose is educational with possible research applications. We present design and construction laboratory facility. Key elements include real-life, flexible network, signal conditioning hardware, data acquisition (DAQ) equipment, client/server industry standard computer networking technology. designed EMS will allow students to get experience on realistic...

This paper presents a Matlab-based voltage stability toolbox (VST) designed to analyze bifurcation and problems in electric power systems. VST combines proven computational analytical capabilities of theory, symbolic implementation graphical representation Matlab its toolboxes. The motivation for developing the package is provide flexible simulation environment an ongoing research conducted at Center Electric Power Engineering (CEPE) Drexel University, Philadelphia, PA, enhance...

A new dynamic electrical load model for an HVAC chiller use in demand response applications is presented. The coupling of a building's and thermal characteristics not adequately captured using existing static models. Therefore proposed. This allows more accurate planning the dispatching side response. this paper derived from tests performed on actual system at Drexel University.

As modern equipment is more sensitive to power quality phenomena, transients introduced by capacitor switching become an increasing concern. The paper addresses the identification of switched position such that on-line or post-fault measures can be taken. given in terms proportional line impedance seen from load bus. Perturbation methods are used find asymptotic expression for as a function transient frequency. This presents analytical and simulation results standard radial distribution system.

The voltage collapse of a power system is analyzed as the result eventual push operating point beyond boundary security due to random fluctuations in load characteristics. effect different fluctuation intensity levels at buses on studied with help stochastic based indicator. It shown that this indicator, will provide further insights into system's vulnerability high degree uncertainty exists present day models.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML"...

This paper presents a power-converter model intended for balanced and unbalanced radial power-flow studies. A three-phase steady-state of power converter (AC/DC-DC/AC) composed diode rectifier, lossless DC link, pulse-width-modulated inverter is presented. Both the rectifier are modeled as three, equivalent, Y-connected single-phase rectifiers inverters, respectively. The implemented within solver with phase representation. Simulation results on an 15-bus system

A method of calculating Available Transfer Capability (ATC) and the exploration relative effects certain computational issues are described. Specifically, calculation ATC is laid out for purposes pointing various aspects that affect it, such as algorithmic tolerances source/sink composition among others. Test cases from Pennsylvania-Jersey-Maryland (PJM) Interconnection used to obtain results on this study. Among inferences obtained work necessity properly account uncertainties exist not...

A multiphase, radial power flow experiment has been developed at Drexel University to provide students with hands-on learning experience in the operation and analysis of unbalanced distribution systems. The is set up within Reconfigurable Distribution Automation Control laboratory (RDAC). Energy Management System (DMS) was a graphical user interface for experiment. DMS provides real-time data from RDAC's system, incorporates computer automated control network reconfiguration capabilities,...