Abstract—The PV systems have increasingly displayed remarkable usefulness and interest, particularly in a wide range of industrial applications, such as industrial control systems, medical applications and hybrid vehicles. Due to the necessity of systems continuity requirement imposed by these applications, a special careful consideration should be granted to the boost converter reliability performance

Abstract Armature reaction is considered as one of the challenging problems in on-load permanent magnet (PM) motors. Reducing the undesirable impacts of the armature reaction is necessary to improve the PM motors performance. The ironless stator PM motor is known as an appropriate choice for low armature reaction. Although in these motors, disturbing high-order harmonics of armature reaction are removed

Abstract In this research study, a comparison between two improved multimodel optimal controllers PID and LQ for two bases with 4 and 8 models is proposed for a variable speed variable pitch wind turbine. This turbine uses a blade pitch angle and electromagnetic torque control to achieve objectives. But we are particularly interested in minimizing the fluctuations of the electrical power and the turbine

Abstract Power swing due to the disturbance in the power system is a cause of the untrue operation of protective elements. Previously, many blackouts have been perceived and recorded due to reactive power mismatch problems, active power mismatch problems, and system venerability. The power system stability is usually disturbed due to the sudden loss of transmission lines, generators, and transformers

Abstract This paper presents a robust tracking controller for the automatic voltage regulator (AVR) system, where both system uncertainties and external disturbances are taken into account. The proposed control scheme combines optimal feedback control with robust control. The parameter gains of the proposed controller have been selected based on Lyapunov theorem to ensure the stability of the closed-loop

Abstract In this work, a high step-up non-isolated DC-DC converter with a coupled inductor is introduced for renewable applications. The output voltage rate of the proposed structure is efficiently excesses by choosing an appropriate turn’s ratio of the coupled inductor. The voltage lift elements are utilized to further increase the voltage gain and also leads to a decrease in the voltage spike through

Abstract Harmonic frequencies existing in power systems produce harmful effects. Signals containing harmonic effect produce power quality problems such as heating, premature wear, motor pulsations, and so on. Commonly, to cancel the harmonic effects in power systems is based on traditional filtering methods. However, such methodologies tend to fail in the presence of high convexity, which produces

Abstract The operation of distribution systems benefits from an efficient voltage and reactive power control, which nowadays is generally achieved by local and independent actions performed by voltage regulators, on-load tap changer transformers, and capacitor banks. However, the modernization of distribution systems has been accompanied by the integration of a communication infrastructure and new

Abstract Integration of the doubly-fed induction generators (DFIGs) changes the existing low frequency oscillation (LFO) modes of power systems and introduces the LFO modes, which may be damped by the power system stabilizer (PSS) installed at the synchronous generators, or recently at the DFIGs. In this article, the state space equations including the transfer function of the DFIG-PSS are derived

Abstract This paper presents a new approach to solving the problem of loss allocation by assigning the losses to generators and consumers, which are the two non-regulated agents of the market. This proposed method suggests assigning the losses of a network line to the nodes which are connected to it as a function of the direction of the active power flow through the line. The nodes with connected loads

Abstract In this work, a digital fault locator has been designed using Arduino for bipolar VSC–HVDC transmission lines based on the ratio of voltage to current signals from source end. Current and voltage signals of only rectifier end have been processed with discrete wavelet transform using DB-4 as the mother wavelet. After the signals are decomposed using wavelet up to level 4, approximate coefficients

Abstract Finite control set model predictive control (FCS-MPC) is an optimal control strategy that solves user-defined objective functions to determine the best control action for the next time interval. Real-time implementations of model predictive control techniques are quite challenging for certain topologies due to computation complexities. In this paper, key aspects of achieving robust, reliable

Abstract This paper presents a model for studying the dynamic economic load dispatch problem in power system including conventional thermal generators and wind turbines. The problem is solved using the hybrid variant Mean Variance Mapping Optimization technique. Due to the stochastic nature of wind speed, the Weibull distribution parameters of wind speed are obtained for different time intervals (24 hours)

Abstract The voltage stability analysis can be carried out using different continuation techniques. The continuation power flow that evaluates all power-flow solutions at different loading levels, is typically considered the most standard one. This approach is mainly based on two stages called predictor and corrector. The standard Newton–Raphson method is usually used at the corrector stage. In this

Abstract Multilevel inverters (MLIs) have become more popular due to the high-quality output waveform with higher voltage levels, lower voltage stress across the power switches, and lower harmonic distortion of the output voltage. This paper introduces two new structures of MLI based on a modified T-type inverter and switched-diode cell. Proposed inverter topologies cascaded in series due to its generalized

Abstract Transverse flux machines (TFMs) originally have heteropolar arrangement of permanent magnets (PMs) on the rotor and a ring winding on the stator. These conventional TFMs are single stack single phase machines. To realize a multi stack polyphase machine, multiple single phase TFMs have to be stacked together. As an alternative to conventional multi stack polyphase TFM (T0), a single stack polyphase

Abstract An intelligent dual-mode control strategy is proposed to extend the MPPT operation range of doubly-fed induction generator (DFIG) and improve the power generation efficiency under low wind speed in this article. By adjusting the strategy of the machine-side converter (MSC) and the necessary switchover, DFIG can automatically operate in two modes depending on the wind speed: the traditional

Abstract Active magnetic bearing (AMB) has drawn such a significant amount of consideration in the rotating machinery industry because of its advantages against conventional bearing such as rolling cement bearing, fluid film, etc. AMBs introduce subsidiary features to the high-speed system, such as remove friction loss, reduce maintenance. This manuscript describes a novel, simplified, and economical

Abstract— The wide-area situational awareness attempts to detect the imminent system instability quickly and alerts the operator to initiate appropriate control action. Faults on the transmission line may result in interruption of power and substantial economic losses. Thus, their situational awareness assessment is very much critical, especially when the power sector is targeting reliability of 99

Abstract Fault diagnosis is increasingly becoming more challenging in distribution network due to complicated network topology and coupling disturbances introduced into the systems. This requires a higher level of rapidity and accuracy of fault diagnosis, location and recovery. This paper proposes an earth fault location algorithm for distribution network using current analysis. The fault information

Abstract No single metaheuristic search algorithm can be adjudged universally best general-purpose optimizer. The performance of search algorithms mainly depends upon the weightage assigned to global and local search strategies. This paper proposed an improved directional bat optimizer to minimize the operating cost of the electric power dispatch (EPD) problem that establishes a balance between global

Abstract This article proposes a voltage regulation scheme for distributed energy resource-connected distribution networks based on static synchronous compensator to compensate for both short-term and long-term voltage sags. The proposed voltage regulation scheme provides a fast and precise control on the nodal voltage, with no need to load shedding, capacitor switching, transformers, or power management

Abstract Due to importance of duty cycle based model predictive torque control (MPTC), it has been accepted as an effective and common alternative control strategy for industry. Since its major drawback is great dependency on duty ratio parameter, the robustness and the complexity of control system has been respectively decreased and increased. A duty-ratio set considering limited members can be replaced

Abstract In this article, a control algorithm with Adaptive Internal Model (AIM) frequency identifier has been discussed for three-phase Distribution Static Compensator (DSTATCOM). An AIM motivated method is implicated in the control scheme to extract fundamental in each phase. The reduction of reactive burden on the supply using DSTATCOM and making the supply current sinusoidal is the main theme behind

Abstract This paper proposes novel switched reluctance (SR) inverter for four-phase SR drive which generates high output torque without compromise in efficiency for medium and high speed operations. In proposed SR inverter drive, the recovered energy of phase windings circulates with help of two boost capacitors. The circulation of energy between two alternate working phase winding provides charging

Abstract Regulating the frequency fluctuations (known as load frequency control) in the power system is an important aspect that directly signifies the balance between the generation and demand. The present study proposes an optimal LFC scheme encapsulating the concept of fractional-order based tilted-integral-derivative (TID) controller having optimized parameters using the recently developed optimization

Abstract Future distribution systems can be seen with very high penetration of renewable energy sources (RESs) such as solar photovoltaics and wind turbines on account of diverse techno-economic and social concerns. The uncertainty and variability associated with these RESs along with the stochastic nature of load demand imposes real challenges to system operators. More realistic formulations and suitably

Abstract Wind power generation is observing a significant use of doubly-fed induction generator (DFIG) due to its improved efficiency, but the converter used in the configuration is sensitive to the presence of a fault in the grid. This paper presents a fault ride-through (FRT) configuration, which includes a thyristor-based bridge-type non-superconducting fault current limiter (ThyBT-NSFCL) augmented

Abstract The importance of probabilistic assessment in distribution systems is very high due to the increasing penetration of renewable energy sources (RESs) with their fluctuating behavior. Also, there are some other uncertain variables in distribution systems such as loads fluctuations. More awareness of the system state by considering many uncertainties provides more certainty in decision making

Abstract Fault detection in an induction motor, particularly at premature stage has become necessary to avoid unexpected damage in industrial process. In this paper, an approach to detect the early stage faults in induction machine using motor current signature analysis (MCSA) is presented. It is proposed to estimate the fault severity from stator current using noise cancelation by an adaptive filter

Abstract —This paper provides a computational methodology based on monarch butterfly optimization (MBO) to find a solution to the problem of cost-based unit commitment (CBUC). The binary variables of unit commitment problems are handled by modifying the continuous-time nature of the monarch butterfly algorithm. Thermal unit generation, uptime, downtime, ramp rate limits as well as system reserve are

Abstract A renewed interest in comprehensive modeling of distribution system components arose in recent literature. This trend can be attributed to, aside from the inherent imbalance of such systems, the rapid and system-wide integration of technologies, e.g. non-linear loads and distributed generators, which further increase grid imbalance effects. Such phenomena, in turn, demand sufficiently detailed

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 With rapidly increasing penetration level of renewable energy sources (RES) in electric grids, it is noteworthy that stable and reliable operation of electric power systems is urgently needed, given the inverter interfaced RES has less inertia compared to conventional rotational generation units. Meanwhile, it should be also noted that grid operation can be categorized as normal and abnormal

Abstract Two hybrid PWM methods are proposed in this paper for a pump drive based on three-level Neutral-Point Clamped (NPC) inverter. The envisaged PWM methods are aimed at reducing output voltage harmonic distortion. While the first PWM method incorporates suitable voltage injection to the carrier signals, the second PWM method incorporates voltage injection to both carrier and the modulating signals

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 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 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 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 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 study proposes a Bayesian network model for nonlinear dependence of wind speed, solar irradiation, and load. The probabilistic load flow calculation based on a Bayesian network model can effectively obtain the probability characteristics of probabilistic load flow solutions (such as the probability density function of the bus voltage and branch flow) considering the correlation of random

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 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 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 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 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 The latest and advance renewable power equipment being deployed in smart cities have increased the overall power generation efficiency. Due to the penetration of internet of things (IoT), the online energy trading (OET) methods in Smart Grids (SG) have significantly enhanced the power generation from multiple renewable resources and enabled the bidirectional flow of power between distributed

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