The prospective spread of electric vehicles (EV) and plug-in hybrid EV raises the need for fast charging rates. High required rates lead to high power demands, which may not be supported by grid. In this paper, an optimal flow technique a PV-battery powered station is presented continuously minimize operation cost. objective help penetration systems into grid support growing charging. An optimization problem formulated along with constraints operating cost function chosen as combination...

This paper presents a novel method of profiling the phase currents to minimize torque ripple switched reluctance machine. The is combination machine design and control algorithm. minimization accomplished in three steps: first step that has symmetric characteristics with an extended flat portion, second find required current profile through simulation, third fine tuning profile. simulation done verify coupling finite-element-based model Matlab/Simulink-based dynamic controller model. coupled...

This paper presents the performance analysis and comparison of two types bidirectional dc-dc converters-cascaded buck-boost capacitor in middle cascaded inductor for use plug-in electric hybrid vehicles. The converters is based on device requirements, rating switches components, control strategy, performance. Each converter topologies has some advantages over other certain aspects. Efficiency been carried out specific scenarios vehicle applications. simulation experimental results are...

As alternative energy sources become more competitive with traditional sources, the proliferation of distributed generation that interface to electric utility grid continues. Most either produce dc directly (solar photovoltaics or fuel cells) create before inversion (wind hydroelectric turbines). The is injected into ac through an inverter. resulting has be compatible within system at point where inverter connected system. control, design, and operation must meet applicable standards. This...

The paper presents a novel fixed switching frequency predictive current control method for switched reluctance machines (SRM). proposed deadbeat controller accurately predicts the required duty ratio PWM pulse given reference in each digital time step over entire speed range of operation. width depends on operating conditions, machine parameters and rotor position. utilizes inductance profile as function position to predict voltage. is studied through computer simulation followed by...

In this paper, a pulse-injection-based method for determining the rotor position of switched reluctance motor (SRM) over its entire speed range is presented. method, single high-frequency pulse injected in an idle phase to determine at high speeds. The proposed estimates through analysis resultant current after voltage injection. A low-speed sensorless previously developed based on injection has also been extended improve robustness against varying operating conditions. with duty ratios...

This paper proposes a novel load-flow analysis (LFA) algorithm for droop-based islanded microgrids (DBIM). The standard LFA is not applicable DBIM due to the absence of node with fixed reference voltage. As voltage in microgrid depends on droop relations, these relations are included as part equations. proposed used particle swarm optimization select parameters that optimize reactive power sharing. Voltage compensation terms also suggested improve regulation. By using LFA, modeling procedure...

The maximum power point tracking (MPPT) method is the key to notably improve efficiency and energy extraction in wind turbine systems. MPPT through characteristic curve one of popular methods. reference current can be obtained using relationship between without requiring real-time speed information. This paper presents steady-state dynamic analyses this proposes a single-pole transfer function describe effect variation on generator speed. conducted by applying small-signal analysis nonlinear...

This paper proposes a smooth transition control strategy for voltage-source inverters between standalone (SA) and grid-connected (GC) modes of operation. In the GC mode, amount power exchanged with utility grid is controlled by regulating phase currents. SA load voltage regulated inverter its dictated control. The operations that will ensure continuous delivery to requires continuation in system voltage. proportional-integral, trapezoidal, sinusoidal, staircase frequency variation techniques...

This paper proposes a smooth transition control strategy for voltage-source inverters between stand-alone (SA) and grid-connected (GC) modes of operation. In both GC SA operation, the use droop method to regulate real power flow without need any external communication them. One distributed energy sources working in microgrid system is designated as dispatch unit (DU) facilitate interconnection with utility grid achieve operations. During modes, this selected takes extra responsibility ensure...

This paper describes the performance comparison of a wind power systems based on two different induction generators as well experimental demonstration turbine simulator for maximum extraction. The machines studied are squirrel-cage generator (SCIG) and doubly fed (DFIG). techniques direct grid integration, independent control, droop phenomenon distribution line compared between SCIG DFIG systems. Both modeled in Matlab/Simulink environment, operation is tested extraction algorithm results....

This paper proposes a fault diagnosis and identification method for nonisolated dc-dc converters. The can detect the fault, identify faulty switch type in less than one switching cycle. main idea is to apply derivative of inductor current based on modulation particular converter provide predictive emulator model. measured its corresponding predicted are used diagnose fault. method, implemented digital signal processor, robust common asymmetry such as load variations, input disturbances, etc....

This paper presents the control strategy for varying turn-on and turn-off angles of three-phase switched reluctance generators (SRGs) to maximize efficiency as well reduce dc-link ripple current resulting from commutation phases at high speeds. The behavior is analyzed first through offline measurement voltage, generator speed, phase currents. analysis collected data has shown that providing minimum on achieve maximum generating efficiencies. A novel technique, developed based finding,...

This paper presents a new dual-switch control structure for an ac/dc noninverting cascaded buck-boost power factor correction converter. The proposed converter operates at discontinuous capacitor voltage mode providing inherent high-power and zero turn-off switching. Additionally, the enables nondistorted sinusoidal current wide range of output levels. Unlike conventional methods, detector is not required consequently there no hard transition between buck boost modes. Although both switches...

In this paper, a unified controller for switched reluctance motors is proposed wide speed operations. The achieves minimum output torque ripple at low and medium speeds operates in single-pulse mode high speeds. Overlapping regions between the phases are controlled such that direct instantaneous control (DITC) current (CC) can be implemented simultaneously on different phases. This simplifies sharing during commutation minimizes due to imperfect tracking mutual torque. A demagnetization...

This paper presents a new approach to the automatic control of excitation parameters for switched-reluctance generator (SRG) where SRG system operates at sufficiently high speed that it in single pulse mode. The turn-on and turn-off angles are two through which we can electric power generation. objective work is develop an easily implementable algorithm automatically maintains most efficient producing required amount power. focused on finding characterizing them easy implemention under...

This paper presents a new inverter output filter topology for pulse width modulation (PWM) motor drives. It is shown that the proposed effectively reduces high frequency harmonics which can cause serious damage to bearings and insulation. The comprised of conventional resistance, inductance, capacitance (RLC) network cascaded with an LC trap filter. trap, tuned switching frequency, very effective in reducing harmonics. By using this need damping resistance low RLC cut-off eliminated. phase...

In this paper, nonlinear droop relations are suggested to optimize the operation of islanded microgrids. By using droop, many aspects microgrid can be optimized, in addition inherent advantages control. proposed method, allowed have any shape as long that satisfies certain characteristics required for stability and proper operation. The procedure constructing minimize operating cost share reactive power effectively among sources is investigated explained detail. selected structure a...

This paper presents advancements in the control techniques of switched reluctance machines (SRMs) for traction and automotive applications. The high performance SRM drive system is embodied smooth torque output high-efficiency methods motoring generating modes operation. Wide speed operating ranges both operations are considered. An designed built an off-road application used as example. Simulation results proposed using presented.

A method is presented to model and tune microgrid-connected solar photovoltaic sources (MCPVs). The proposed controller combines maximum power point tracking with droop participate in voltage frequency regulations of islanded microgrids. In this paper, the controllers required by MCPV are developed a modeling procedure controllers. effect penetration level on design reflected stabilize as it switches among operation modes. effectiveness verified simulation experimental studies.

This paper presents a method of profiling the phase currents to minimize torque ripple switched reluctance machines (SRMs) operating in four-quadrant mode over entire speed range operation. The is based on machine and controller design through coupled simulation finite-element-based model dynamic model. considers mutual coupling effect between conducting phases. research quantifies sensor error manufacturing build variations level minimization. mitigation processes address issues mass...

Droop control is a widely used technique for load sharing in dc microgrids (MGs). However, it has an inherent limitation that leads to voltage deviations at the bus. More importantly, its current-sharing performance degraded due drops across transmission line impedances. Depending on amount of these over bus, droop different errors and bus degradations. Therefore, MG topology loading conditions (LCs) have considerable effect accuracy regulation. In this paper, optimization procedure...

A mobile charging system (MCS) for electric vehicles (EVs) is presented in this paper. The proposed MCS has a 2-MWh energy storage capacity five EVs simultaneously with 75-kW individual rates. would be rechargeable from the available power substations (three phase, 480 V) 375-kW rate. appropriate modular interface designed and implemented between MCS, batteries of EVs, substations. Experimental validation paper to demonstrate performance effectiveness under rapid requirements.

This paper presents the design of a switched reluctance machine (SRM) for off-road hybrid electric vehicle applications. SRMs are ideally suited this application their low cost, fault tolerance, and reliable operations. A multistage fast methodology SRM is presented in paper. The process aims to determine best speed at which would start single-pulse mode operation. ensures efficiencies over specified operating range. initially designed that point using analytical tools then further optimized...

The operating cost of islanded microgrids (μGs) can be minimized by performing an optimal power sharing among the distributed generators (DGs). In this study, a plug-and-play optimization scheme (PPOS) for developing nonlinear droop relations is proposed to achieve DGs in μGs. PPOS constructs each DG, which are used as curves that adjusts output subsequent any load variation minimize μG effectively. construction performed individually DG optimizing one against hypothetical DGs. This approach...