Abstract Doubly fed induction generator (DFIG) is one of the important generators that is used in the wind turbines structure. In the previous years, DFIGs based wind turbine system that have installed in the onshore and offshore wind farms have more number than other generators. In this paper, a new method has been presented for design and optimization of a 500 kW DFIG. At first, equations of the

Abstract According to the new international grid codes, ancillary services from renewable energy sources are essential, especially when these sources are harnessed as distributed generators. Power oscillation damping (POD) is a supplemented feature needed from wind power plants. This paper investigates different control techniques that can support wind farms based on a doubly fed induction generator

Abstract This article presents an improved maximum power tracking and power sharing technique by using a self-recurrent wavelet neural network (SRWNN) controller. A power factor correction (PFC) rectifier as machine-side converter and proportional resonant (PR) controlled three-phase inverter as grid-side converter for wind energy conversion system (WECS) is presented. The modified PFC rectifier ensures

Abstract Due to the increase of load demand, the utility tends to utilize DG technology in recent years. The intentional islanding is an appropriate approach to enhance system performance such as reliability and operational flexibility. This research provides a new paradigm for intentional islanding to maximize the efficiency of the power system. The methodology is based on an advanced load shedding

Abstract In the double-circuit transmission line (DCTL), location of cross-country faults (CCFs) is more wearisome due to its intricate nature. The CCFs can occur at miscellaneous locations on dissimilar phases at the same fault inception time. Furthermore, the CCFs encompasses different fault locations which can mislead the line patrolling team and not only takes long hours to attend the fault location

Abstract The search for the Hopf bifurcation point in power systems can be made as the load is increased by small steps, and a power flow is solved for every load until a pair of purely imaginary eigenvectors has been found (zero real part). However, a search through successive power flows is time-consuming and does not guarantee that the Hopf bifurcation point will be found. This paper proposes a

Abstract— This paper analyses the stability issues of a multi-fed radial distribution network (RDN) by evaluating its states using a state-of-the-art technique under different operating condition. In its working principle, the entire RDN is visualized as a network comprising of N number of 2-bus sections cascaded sequentially. The required bus states are evaluated using the feed forward technique on

Abstract Recently, employing environmentally-friendly devices such as Energy Storage Systems (EESs) and Renewable Energy Resources (RERs) has been one of the remarkable ways to deal with the increasing trend of fossil fuel cost as well as environmental issues. Due to the stochastic nature of the RERs, especially wind farms and their effects on power system operation and planning, the ESS is used to

Abstract A separate reactive market is necessary due to the vital role of reactive power in the system security and reliability. In order to maintain the reliability of the system, reactive power-based indices should be utilized in the reactive power market-clearing model, in which the improvement of these indices depends on the amount of reactive power reserve availability in the system. Therefore

Abstract Faced with the problem of high wind power curtailment, it is necessary to allocate a certain amount of energy storage power to promote wind power accommodation and stabilize grid operation. A pumped storage power station capacity planning method based on the full life cycle cost is proposed. The method comprehensively considers the life cycle cost of the pumped storage power station, the benefit

Abstract This research paper presents stand-alone and grid-tied micro-inverters for Photo Voltaic (PV) applications. It also addresses several key technical control related issues in the domain of micro-inverter technology for PVs. One portion of this research deals with the digital control strategies for micro-inverters. One Sampling Ahead Preview (OSAP) control has been used to track sinusoidal ac

Abstract In the coming years, charging of electric vehicles (EVs) may impose significant power loads on the existing utility system. Alternatively, the integration of EVs with distributed generation units may cause several uncertainties in microgrids. In such situations, controlling the frequency of microgrids will be a challenging task. Consequently, this calls for the requirement of implementing

Abstract When a fault occurs at a grid-connected photovoltaic (PV) system, the grid voltage drops significantly, and this causes a spike in the DC link voltage. The high DC voltage, in turn, causes faults in the Power-Electronics inverters and choppers. In addition, PV plants form a significant portion of modern power systems and disconnecting them during faults (as conventional) is no longer an option

Abstract– In wind-integrated substations, the setting of the over current relays (OCRs) must be appropriately selected on line with the variations in fault levels, which in turn change with the wind-speed dynamics. An adaptive technique for the coordination of the OCRs is suggested as a solution for avoiding the mal-function of the relays. This paper proposes an algorithm in which wind speed is forecasted

Abstract The optimal protection coordination (OPC) problem of directional overcurrent relays (OcR) in power system networks is a complex, highly constrained nonconvex optimization problem because of the nonlinear inverse nature of the OcR characteristics. Finding the best OcR settings by solving OPC is a challenging task because of its nonconvex nature. Although various heuristic, hybrid heuristic

Abstract Nowadays, the attainment of flexibility in different loads for different electricity customers is an interesting topic. The assessment of flexibility is important because of the ultimate benefits to handle challenges for both electricity customers and utilities. At first, different loads that have significant contribution in energy consumption and may be potential candidates for the extraction

Abstract Aiming at the problem of optimal power flow in photovoltaic (PV) Inverters, this paper proposes a real-time algorithm for optimal power flow (OPF) in distributed PV inverters with sophisticated communication technologies and measurement. A higher accuracy and computation speed are obtained by proposing a linear, time-varying optimization method, and the objective function and constraints were

Abstract Protection performance is characterized by qualities that include selectivity, speed, sensitivity and stability. Generally, selectivity and speed present conflicting requirements on the protection design, as do sensitivity and stability requirements. The integration of distributed generation (DG), in particular at the distribution level, further compromises satisfactory achievement of these

Abstract Transmission system expansion leads to excessive short-circuit currents that exceed the capacity of circuit breakers. To avoid over short-circuit current; transmission system operators make various alterations in the transmission system by changing the topology of the system. The feeders can be distributed to different buses in substations through disconnecting coupling circuit breaker between

Abstract This research investigation was performed to seek the bio-based alternative for the liquid insulator in transformers. The current investigation aims to examine the effect of oil rancidity on the dielectric strength of bio-based oils along with the other preliminary examinations like fire point, flash point, and viscosity. Sunflower oil portrayed the notable performance under all the tests

Abstract Modular multilevel converter (MMC) is a promising highly modular converter. However, the problems of voltage balancing control strategies in the MMC should be studied in detail. In order to improve the effect of voltage balancing, reduce the amount of calculation, and simplify the switch control of the submodules (SMs), this paper proposes a method that using a matrix to control the switch

Abstract This paper presents an efficient technique for early diagnosis of simultaneous faults in different phases of stator winding of a three-phase induction motor due to turn-to-turn short circuit. A real-life motor has been designed and manufactured with fault emulation features in all the phases of stator winding. Phase currents are recorded by a data acquisition system for different fault conditions

Abstract This work presents the strategy for vector control of permanent magnet synchronous motor (PMSM) drive fed with a three-phase multi-level voltage source inverter for high performance. In the present work, the traditional 2-level inverter is replaced with a novel reduced switch 5-level inverter, and comparative analysis is done. The implementation of the five-level inverter improves the torque

Abstract This paper proposes a novel three-phase inverter based on buck converter and an efficient control method for the operation. The inverter circuit is comprised of moderate numbers of elements in terms of reducing design density and cost and improving operation capabilities. Unlike the similar studies in the literature, an efficient inverter control method that is feedforward supported closed-loop

Abstract This article presents a novel linear programming (LP) based two-stage stochastic approach for microgrids (MGs) under uncertainties. In this regard, the day-ahead programming of dispatchable resources in MG was modeled, considering the uncertainties in demand loads, and upstream network electricity price. Moreover, the inherent stochastic nature of wind and solar resources as well as the environmental

Abstract The paper addresses the simulation of a novel real-time implementation of a photovoltaic (PV) and fuel cell (FC) hybrid integration power system. The hybrid system has the potential of reducing the dependency on batteries, leading to reduced cost and increased life span of the whole system using the Proton Exchange Membrane (PEM) fuel cell. The interface structure of the hybrid system has

Abstract This paper deals with the simultaneous tuning of proportional integral controller of static synchronous compensator (STATCOM) associated with lead-lag controller (LL) in order to improve the stability performance of combined wind farm (CWF). This type of farms has been developed to summarize the main benefits of Squirrel-Cage Induction Generator (SCIG) and doubly fed induction generators (DFIG)

Abstract This paper describes the characteristic investigation of the Novel Dual-stator V-Shape Magnetic Pole Six-Phase Permanent Magnet Synchronous Generator (NDSVSMPSP-PMSG) for wind power application. The proposed generator has V-shaped embedded magnetic pole in the rotor and six-phase winding in both the stator. The proposed generator has high-power density and high efficiency. For emphasizing

Abstract In most of the automatic generation control (AGC) studies proposed so far, area control error (ACE) signal is derived considering fixed step size load disturbance which does not represent the real time operating condition of power system adequately and may cause sometimes the over regulation of the power system. Therefore, a very short-term load forecasting (STLF) using artificial neural network

Abstract Water desalination can offer a potential solution for water scarcity. Additionally, desalination technologies that mainly consume electric energy, such as reverse osmosis, can expand the market for electric utilities. Despite such benefits, the main question around desalination remains to be its economic competitiveness. To evaluate the cost-effectiveness of water desalination, this paper

Abstract Recently, integration of distributed generations (DGs) and shunt capacitors in radial distribution network are becoming popular to withstand the rapidly increasing in electricity demands. In this article, a hybrid method is proposed to obtain the best locations and sizes of capacitors and DGs in radial distribution network. This hybrid method is based on chaotic whale optimization algorithm

Abstract Energy management (EM) is the essential factors of a smart grid, among residential consumers. These also include the demand side response and cost analysis. The aim of this paper is to be ecological benefit analysis for better consumption and load management. By shifting the load demand, the housing electricity cost reduced by the house energy management system (HEMS)-based cost analysis technique

Abstract Building energy consumption accounts for a large fraction of the total global energy usage, and considerable energy savings are expected to be achieved in this respect through residential electrical load monitoring. Due to the limitations on the practical implementation of in-depth and expensive monitoring systems, non-intrusive load monitoring (NILM) is becoming a hot topic. In this paper

Abstract This article presents easy and robust Measurement Fault Detection and Isolation (MFDI) and Fault Tolerant Control (FTC) technique against grid voltage measurement failure, where scaling and dc-offset errors are considered. The proposed MFDI method is based on grid voltages orientation, which enables to generate two residuals. It does not require an extra hardware and is insensitive to system

Abstract Winding fault diagnosis and failure prognosis technique has been developed based on d-q model of brushless synchronous generator (BLSG) considering actual winding insulation degradation curve of machine in inter-turn fault, damper bar and field currents for various severities of inter-turn winding faults have been estimated using extended Kalman filter. For validation of damper bar currents

Abstract In this paper, a new non-isolated high voltage gain dc/dc converter with low input current ripple is proposed for renewable sources applications. The proposed converter combined SEPIC converter and voltage multiplier cells. In order to achieve high voltage gain, the proposed converter can increase the output voltage level using the voltage multiplier unit. The voltage stress across the semiconductors

Abstract— This article proposes a dual space vector control strategy for quasi Z-source direct matrix converter (QZSDMC) which is made up of quasi Z-source network coupled to a matrix converter (MC). It ensures effective regulation of voltage regulation range and overpowers the voltage transfer ratio restrictions of conventional matrix converter. The QZSDMC can afford buck boost operation by observing

Abstract In this article, a V/f control with two stabilizing loops and maximum torque per ampere (MTPA) control for spoke-PM synchronous motor drives is proposed, and experimentally compared against a sensorless field-oriented control (FOC) strategy based on active flux observer. To improve the drive dynamics, the standard V/f control is enhanced with two stabilizing loops, which provide corrections

Abstract This article proposes an isolated high step-up dual-flyback DC–DC converter with a resonant voltage multiplier. The proposed converter achieves galvanic isolation and high voltage gain by adopting dual-flyback structure and voltage multiplier. The energy of the leakage inductors is recycled and the maximum voltage of main switch is clamped to low voltage by the clamping diode. Also, the diodes

Abstract The objective of this research work is to develop an enhanced particle swarm optimization (PSO) and apply the same toward maximum power point tracking (MPPT) in photovoltaic (PV) systems under partial-shaded conditions. Toward this goal, detailed study is carried out in the flocking behavior of birds and it is observed that during the initial stages, birds do fly randomly, but as the flight

Abstract—Induction heating (IH) technology is increasingly implemented in domestic, industrial as well as medical applications in the modern era. Designing of modern IH system incorporates high frequency (HF) resonant converter that results in the generation of HF harmonics. The HF harmonics has an inherent tendency to back flow toward the supply side and deteriorates the power quality at the grid

ABSTRACT—Multiport converters (MPCs) have the tremendous performance over conventional solutions that employ multiple single converters in multi-input and multi-output applications. Further, it gives the economic operation and improves the performance of the system. Hence, in the recent past, a lot of development and research have been carried out for developing the single-input dual-output (SIDO)

Abstract—This paper introduces a novel method to achieve sensorless speed control of a Five-phase Permanent Magnet Synchronous Motor (PMSM) drive in case of a single-phase open-circuit fault regardless which phase is open. The motor performance when an open circuit fault occurs is as good as it is before the fault. The degradation in motor performance, when an open circuit fault occurs, is minimized

Abstract This paper presents the characteristics of permanent magnets in a synchronous reluctance machine by employing analytical and finite element methods. Four possible designs are studied and their characteristics are compared against a base synchronous reluctance machine with linear barriers to reveal machine characteristics. Then, the paper proposes a novel optimization topology to optimize permanent

Abstract One of the requirements for the electric machine designer is to provide an optimal back-EMF waveform in a high-performance application such as electric vehicles (EV) or hybrid EVs (HEV) systems. This paper presents a design technique for the shaping of back-EMF waveforms in brushless permanent magnet (PM) AC and DC machines. At first, back-EMF waveforms are calculated by an analytical model

Abstract This work presents an innovative approach for solving the problem of unbalance in three-phase induction motors (IM). The presented contribution is based on optimal controller operating with a quantized swarm-intelligence algorithm. The work starts by modeling and investigating the effects of unbalance factors on a three-phase IM operation. The mathematical model of the IM is based on steady

Abstract This paper presents a novel design of an energy optimization approach for Induction Motor (IM) drives. Differently from former optimal control studies, the proposed control strategy is based on a designed cost function given as a weighting sum of power and energy models. The problem to be considered is to achieve the loss minimization of IM drives for any possible constraints imposed by the

Abstract Direct torque control (DTC) is most popular technique used in industries for adjustable speed of drives. It has simple control algorithm without any pulse width modulation technique and vector transformations involvement. Two level voltage source inverter (VSI)-fed permanent magnet synchronous motor (PMSM) operated with DTC has higher torque and flux ripple problems due to the limited voltage

Abstract Due to increase in load demand the use of distributed generation has been increased in the distribution system. Voltage profile as well as voltage security state of the distribution system can be improved by incorporating Distributed Generator (DG) of particular sizes at specific locations. In this article, modified spider monkey optimization (MSMO) technique has been proposed for finding

Abstract An optimum maintenance plan for the protection systems of substations leads to improve the reliability while reducing the related costs. Reliability-centered maintenance (RCM) is one of the widely used strategies to obtain an optimal maintenance plan. An important issue in the protection systems is lack of a direct way between normal operation states of the pieces of equipment and their failure

ABSTRACT—Partial discharge (PD) diagnostic is an effective tool for condition monitoring of the high-voltage equipment that provides an updated status of the dielectric insulation of the components. Reliability of the diagnostics depends on the quality of the PD measurement techniques and the processing of the measured PD data. The online measured data suffer from various inaccuracies caused by external

Abstract Penetration of distributed generations (DGs) enable microgrid to operate in different mode such as grid-connected and islanded mode with radial and mesh topology. The fault current magnitude and direction varies according to the operating conditions which imposes serious protection challenges and may lead to protection system failure and nonselective relay operation. Thus, the impact of operating

Abstract—We introduce an algorithm to solve the problem of load balancing and loss minimization in distribution networks impacted by temporary service restoration activities. The novelty of the proposed algorithm lies in employing utility directed usage of customer distributed battery energy storage systems, which are assumed to be present and available in the network. With increasing penetration of

Abstract—Globally, the shading phenomenon has been identified as one of the major issues relating to the successful and effective operation of photovoltaic (PV) system. Shading can be due to neighboring development, passing mists, fowls or winged animals’ litter, etc. that will decrease the generation of PV system. The PV generations under partial shading can be enhanced by suitably selecting PV array

Abstract—A hybrid switched capacitor multi-level inverter topology is proposed in this paper. The topology has a basic unit and an extendable “n” module. The number of levels synthesized and the voltage gain delivered is based on number of such “n” modules connected in series. For “k” number of “n” modules, 4k + 9 levels can be obtained in the terminal voltage with a voltage boost of 1:(k + 2). Also

Abstract The requirement of a robust and adaptive control algorithm in active filters is inevitable nowadays. In this paper, an ADAptive LINEar neuron (ADALINE) based Least Mean Square (LMS) control algorithm is proposed for a three-phase-four-wire (3P4W) distribution power system under unbalanced loading conditions. The proposed controller has a unique inbuilt characteristic to extract the fundamental

Abstract—Microgrids usually operate in grid-connected or islanded mode. Due to substantial variation in fault current, same protection coordination scheme cannot be applied in both modes. Moreover, network topology keeps on changing due to momentary events. In this paper, an adaptive protection strategy is proposed to avoid any miscoordination between numerical directional overcurrent relays under

Abstract—Industrial Energy Measurement System (IEMS) used for measurement of electrical energy consumed by high-tension industrial consumers. It consists of three current transformers (CTs) and three potential transformers (PTs). Cost of IEMS increases with improvement in its accuracy class. The contribution of this article is that, it adduces design and development of high accuracy class and cost-effective

Abstract—Shortage of nonrenewable energy resources, the pollution arising from extraction and exploitation of these resources, and increasing demand for energy, along with the intermittent nature of renewable resources have resulted in more attention to demand response programs in smart grids. Demand response includes activities like load management, energy efficiency, and energy saving. The residential

Abstract—In order to address the problems that model-based distance protection cannot correctly identify the fault phases in the DCTL (Double Circuit Transmission Lines on the same tower), a CNN-based (Convolutional Neural Network) fault phase identification method is proposed. The proposed method only uses the current and voltage waveforms of single-ended and single-circuit of DCTL to identify the