A major technical obstacle for rooftop photovoltaics (PV) integration into existing distribution systems is the voltage rise due to reverse power flow from distributed PV sources. This paper describes implementation of a control loop within inverters that maintains acceptable bounds by absorbing or supplying reactive power. In principle, this can be considered form Volt/VAr control, which conventionally performed coordinated capacitor banks and transformer tap changers. Comprehensive...

This paper proposes an operating framework for aggregators of plug-in electric vehicles (PEVs). First, a minimum-cost load scheduling algorithm is designed, which determines the purchase energy in day-ahead market based on forecast electricity price and PEV power demands. The same applicable negotiating bilateral contracts. Second, dynamic dispatch developed, used distributing purchased to PEVs day. Simulation results are evaluate proposed algorithms, demonstrate potential impact aggregated...

This paper proposes methodologies to estimate the electric energy and power consumption by light-duty plug-in vehicles (PEVs). Using travel patterns of in U.S. obtained from 2009 National Household Travel Survey, PEVs' are estimated for two uncontrolled charging scenarios.

This paper presents an average-value model of a line-commutated converter-based HVDC system using dynamic phasors. The represents the low-frequency dynamics converter and its ac dc systems, has lower computational requirements than conventional electromagnetic-transient (EMT) switching model. developed dynamic-phasor is verified against EMT CIGRE Benchmark. Simulation results confirm validity accuracy average value in predicting ac- dc-side quantities. Merits applicability limitations are...

This paper presents a low-frequency ac (LFAC) transmission system for offshore wind power. The LFAC is interfaced with the main power grid cycloconverter. plant collection dc based, and connects to line 12-pulse thyristor converter. A method design system's components controls set forth. Simulation results are provided illustrate performance.

The objective of this paper is to investigate the ability physics-informed neural networks learn magnetic field response as a function design parameters in context two-dimensional (2-D) magnetostatic problem. Our approach follows. First, we present functional whose minimization equivalent solving parametric problems. Subsequently, use deep network (DNN) represent space and that describe geometric features operating points. We train DNN by minimizing using stochastic gradient descent. Lastly,...

This paper details the design of a three-phase transmitter-receiver topology for use in dynamic wireless power transfer (DWPT) system heavy-duty electric vehicles. The proposed approach eliminates oscillation and voltage/current sharing problems that plague planar DWPT systems. Multi-objective optimization is employed to maximize magnetic coupling minimize undesired positive–negative sequence coupling. Selected designs are simulated 200-kW/m system, verifying elimination phase imbalance with...

A brushless excitation system model is set forth that includes an average-value rectifier representation valid for all three rectification modes. Furthermore, magnetic hysteresis incorporated into the d-axis of using Preisach's theory. The resulting very accurate and ideal situations where exciter's response particular interest. model's predictions are compared to experimental results.

This paper analyzes a topology consisting of squirrel-cage induction machine and Vienna rectifier for wind energy conversion system. Simulation results reveal that this configuration is advantageous with respect to efficiency compared traditional six-switch two-level converter. In addition, it can have higher reliability, due reduced blocking voltage stress across the semiconductors. The theoretical analysis feasibility proposed are validated by experimental obtained from prototype

This paper sets forth a novel intelligent residential air-conditioning (A/C) system controller that has smart grid functionality. The qualifier "intelligent" means the A/C advanced computational capabilities and uses an array of environmental occupancy parameters in order to provide optimal intertemporal comfort/cost trade-offs for resident, conditional on anticipated retail energy prices. term "smart-grid functionality" prices can depend wholesale Simulation studies are used demonstrate...

High-voltage direct-current (HVDC) systems play an important role in modern energy grids, whereas efficient and accurate models are often needed for system-level studies. Due to the inherent switching HVDC converters, detailed switch-level computationally expensive simulation of large-signal transients hard linearize small-signal frequency-domain characterization. In this paper, a dynamic average-value model (AVM) first CIGRE benchmark system is developed state-variable-based simulator, such...

The conventional qd induction motor model typically used in drive simulations is very inaccurate predicting machine performance, except perhaps for the fundamental component of current and average torque near rated operating conditions. Predictions ripple are often error by a factor two to five. This work sets forth an specifically designed use with inverter models study machine-inverter interaction. Key features include stator rotor leakage saturation as function magnetizing flux,...

This paper analyzes a topology consisting of permanent-magnet synchronous generator and Vienna rectifier for wind energy conversion system. A control strategy leading to maximum efficiency is proposed. Simulation results reveal that this configuration advantageous with respect compared traditional six-switch two-level converter. Experimental are provided demonstrate the feasibility proposed

In this paper, a parameter identification procedure for recently proposed hysteretic brushless exciter model is discussed. The features average-value representation of all rectification modes, and incorporation magnetic hysteresis in the d-axis main flux path using Preisach's theory. Herein, method obtaining model's parameters from waveforms field current alternator terminal voltage set forth. particular, genetic algorithm employed to solve optimization problem minimizing prediction error...

This paper addresses equivalent circuit and magnetic saturation issues associated with synchronous machine modeling. In the proposed model, rotor circuits are replaced by arbitrary linear networks. allows for elimination of parameter identification procedure since measured frequency response may be directly embedded into model. Magnetic is also represented in both q- d-axis. The model computationally efficient suitable dynamic time-domain power system studies.

Summary form only given: A major technical obstacle for rooftop photovoltaics (PV) integration into existing distribution systems is the voltage rise due to reverse power flow from distributed PV sources. This paper describes implementation of a control loop within inverters that maintains acceptable bounds by absorbing or supplying reactive power. In principle, this can be considered Volt/VAr control, which conventionally performed coordinated capacitor banks and transformer tap changers....

Distributed photovoltaic (PV) power generation systems are being rapidly deployed worldwide, causing technical problems such as reverse flows and voltage rises in distribution feeders, real reactive transients that affect the operation of bulk transmission system. To fully understand address these problems, extensive computer simulation studies required. this end, paper sets forth a cloud shadow model can be used to recreate rooftop PV embedded feeder, or utility-scale plant, during days...

An advanced induction motor model that includes stator leakage saturation, rotor magnetizing and distributed system effects in the circuits has been set forth. This is considerably more accurate than traditional models, particularly terms of predicting switching-frequency dynamics. The proposed very general range magnetic properties can be incorporated. paper provides suggestions for specific forms characteristics derives resulting small-signal impedance large-signal steady-state equivalent...

A synchronous machine model with saturation and cross an arbitrary rotor network representation that uses a voltage-behind-reactance for both the stator windings field winding of is proposed. This allows to be represented as branches in circuit solver, permitting straightforward simulation connected circuitry. In particular, can simulated rectifier loads or sources applied winding. The validated against experimental data, its utility demonstrated excitation failure case study.

Wind turbines are required to meet grid interconnection codes for voltage ride-through, which mandate that they should not disconnect during a specified range of disturbances. One the tasks turbine's design verification process is ensure it will be able withstand any such event. This paper sets forth powerful computational technique Type-4 permanent-magnet synchronous generator-based with fully-rated grid-side converters. The proposed method can provide assurance as whether currents and...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> A voltage-behind-reactance formulation of a synchronous machine model is set forth, which incorporates saturation and cross-saturation, general enough to encapsulate variety rotor structures by use arbitrary linear networks instead equivalent circuits. Specifically, the model's equations—originally expressed in <emphasis emphasistype="italic">qd</emphasis>-axes framework—are rewritten such way as...

Depending upon the charging technique, fleets of PHEVs integrated within power grid behave as constant loads (CPL) or impedance (CIL). In this paper, a small-signal stability analysis system with high PHEV penetration is performed. The results indicate that when are charged constant-current more prone to instability. Consequently, operating CILs can increase their maximum levels before becomes unstable.

This paper presents an investigation of hydro power plants with pelton-type turbine-generator sets that are coupled hydraulically and electrically. In particular, the dynamic behavior speed performance this type at black-start is analyzed using singular value decomposition (SVD) relative gain array (RGA). Following, robust control theory used to design a hydro-stabilizer improves turbines while accounting for typical uncertainties in actuators.

This paper presents the implementation of an induction machine dynamic simulation on a field-programmable gate array (FPGA) board. Using FPGAs as computational engines can lead to significant speed gains when compared typical PC computer, especially operations be efficiently parallelized The textbook example free acceleration followed by step load change is used outline basic steps designing explicit Runge-Kutta numerical ordinary differential equation (ODE) solver FPGA platform. results and...