Parviz Rastgoufard

Bio: Parviz Rastgoufard is an academic researcher from University of New Orleans. The author has contributed to research in topics: Electric power system & Fault (power engineering). The author has an hindex of 6, co-authored 24 publications receiving 104 citations.

Steady state voltage stability enhancement using shunt and series FACTS devices

Abstract: Power systems consist of generation, transmission, and distribution of power to customers. To meet the ever increasing population demand, the power industry has also grown by increasing the number of devices and incorporating highly complex as well as expensive components into the power system. It becomes specifically important to focus on voltage stability analysis of the power system to avoid worst-case scenarios, such as voltage collapse, which may result in huge losses. One of the main causes of voltage collapse is the insufficient availability of reactive power in the system. This can be overcome by adding reactive power sources such as FACTS devices into it. An attempt on enhancing the steady-state voltage stability using FACTS devices has been made in this work. An IEEE 39-bus test system is built using MATLAB and PSAT. FACTS devices such as Static VAR Compensator (SVC), Static Synchronous Compensator (STATCOM), and Thyristor Controlled Series Capacitor (TCSC), are included into the test system as three separate test cases. Continuation power flow analysis is performed on the system with no FACTS included in it and on the three test cases with different FACTS included in it. The output is displayed in the form of P-V curves, loading margin curves, and active and reactive power losses curves. The results obtained are all compared with each other to draw conclusions on the effectiveness of the each of the FACTS devices in improving the static voltage stability of the power system.

Toward Less Rare-Earth Permanent Magnet in Electric Machines: A Review

Abstract: Many electric traction drive systems (ETDSs) are driven by electric motors primarily composed of high-energy rare-earth (RE) permanent magnets (PMs), such as neodymium–iron–boron (NdFeB) and samarium–cobalt (SmCo). Given the high cost of RE materials, there is a great interest among various industry sectors in searching for breakthrough technologies that reduce the consumption of high-energy RE magnets in their electromechanical energy conversion systems. The reduction of the magnetic volume is typically realized either by replacing a portion of the high-energy RE magnet with the low-energy ferrite magnet (knows as hybrid structure) or by modifying the magnetic arrangement of the machine itself, where a portion of the physical RE magnets is removed and replaced by induced magnets (known as consequent-magnetic pole structure). For this purpose, this article presents a review of the current state-of-the-art motor typologies with less-RE PMs and their key design challenges, followed up by a series of recommended guidelines to overcome related design challenges.

A practical method for power systems transient stability and security analysis

Abstract: The purpose of this paper is to provide a summary of an investigation of transient stability analysis using a combination of step-by-step integration and direct methods. The proposed method is based on extension of equal area criterion to transient stability analysis of multi-machine power systems. The proposed method first calculates the potential and kinetic energies of all machines in a power system before and after occurrence of faults. It then calculates two numbers based on energies of two groups of generators. It finally compares the largest group of kinetic energy to the smallest group of potential energy to determine the system's transient stability. A decision on stability of the system is made when the smallest group of potential energy is larger than the largest group of kinetic energy. The proposed method is used in analysis of the New England IEEE 39-bus system and the accuracy of the result is performed by comparison to the results obtained by pure numerical methods. Determination of stability using the proposed method is conservative and may be appropriate for power system operation as well as planning purposes.

Design and Analysis of Line Start Synchronous Reluctance Motor with Dual Saliency

Abstract: This paper presents a design for a line start Synchronous Reluctance Motor (SynRM) capable of operating in two different synchronous speeds The proposed design is based on variable pole numbers for the stator and the rotor To accommodate the stator with variable pole numbers, the stator winding consists of two sets of independent windings to switch the operating pole number for low and high speed regions Likewise, the rotor is especially designed to create two different reluctance pole numbers to match with the operating stator pole numbers The proposed design enables the motor to operate as a SynRM at two different operating speeds without requiring a drive unit To verify the performance of the proposed design, the motor is analyzed in steady state and transient domain using 3-D Finite Element Analysis (FEA)

Forecasting Locational Marginal Pricing in deregulated power markets

Abstract: This investigation focuses on development of new methodologies for implementing power systems optimization for forecasting Location Marginal Prices (LMP) in deregulated electricity markets. The proposed approach uses the LMP method [1–3] to show relationships between generator bids, power system constraints, and electricity demand. The proposed approach uses Unit Commitment, Economic Dispatch, and Optimal Power Flow to perform load flow analysis that includes LMP calculation to determine price of electricity.

Energy function analysis for power system stability

Abstract: (1990). ENERGY FUNCTION ANALYSIS FOR POWER SYSTEM STABILITY. Electric Machines & Power Systems: Vol. 18, No. 2, pp. 209-210.

Voltage Stability Of Electric Power Systems

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A multiobjective hybrid bat algorithm for combined economic/emission dispatch

Abstract: In this paper, a multiobjective hybrid bat algorithm is proposed to solve the combined economic/emission dispatch problem with power flow constraints. In the proposed algorithm, an elitist nondominated sorting method and a modified crowding-distance sorting method are introduced to acquire an evenly distributed Pareto Optimal Front. A modified comprehensive learning strategy is used to enhance the learning ability of population. Through this way, each individual can learn not only from all individual best solutions but also from the global best solutions (nondominated solutions). A random black hole model is introduced to ensure that each dimension in current solution can be updated individually with a predefined probability. This is not only meaningful in enhancing the global search ability and accelerating convergence speed, but particularly key to deal with high dimensional systems, especially large-scale power systems. In addition, chaotic map is integrated to increase the diversity of population and avoid premature convergence. Finally, numerical examples on the IEEE 30-bus, 118-bus and 300-bus systems, are provided to demonstrate the superiority of the proposed algorithm.