Most of the existing demand-side management programs focus primarily on interactions between a utility company and its customers/users. In this paper, we present an autonomous distributed energy system among users that takes advantage two-way digital communication infrastructure which is envisioned in future smart grid. We use game theory formulate consumption scheduling game, where players are their strategies daily schedules household appliances loads. It assumed can adopt adequate pricing...

In this paper, we consider a smart power infrastructure, where several subscribers share common energy source. Each subscriber is equipped with an consumption controller (ECC) unit as part of its meter. meter connected to not only the grid but also communication infrastructure such local area network. This allows two-way among meters. Considering importance pricing essential tool develop efficient demand side management strategies, propose novel real-time algorithm for future grid. We focus...

In this paper, we consider deployment of energy consumption scheduling (ECS) devices in smart meters for autonomous demand side management within a neighborhood, where several buildings share an source. The ECS are assumed to be built inside and connected not only the power grid, but also local area network which is essential handling two-way communications grid infrastructure. They interact automatically by running distributed algorithm find optimal schedule each subscriber, with aim at...

Voltage-source converter (VSC) technologies are rapidly evolving and increasing the range of applications in a variety fields within power industry. Existing two- three-level VSC being superseded by new modular multilevel (MMC) technology for HVDC applications. The computational burden caused detailed modeling MMC–HVDC systems electromagnetic transient-type (EMT-type) programs complicates simulation transients when such integrated into large networks. This paper develops compares different...

This paper presents modeling guidelines and a benchmark system for power simulation studies of grid-connected, three-phase, single-stage Photovoltaic (PV) systems that employ voltage-sourced converter (VSC) as the processor. The objective this work is to introduce main components, operation/protection modes, control layers/schemes medium- high-power PV systems, assist engineers in developing circuit-based models impact assessment studies, analysis, identification potential issues with...

Modeling and analysis of power power-electronic systems' transients using digital programs enables testing new design concepts in modern electric grid many industrial commercial products applications. This paper gives an overview dynamic average-value modeling techniques for representing static switching converters the system-level studies. Concepts desirable properties averaged models conducting large-signal time-domain transient studies small-signal frequency-domain control tasks are...

Distribution systems are undergoing many enhancements and developments to enable the future smart grid, distribution system state estimation (DSSE) provides control centers with information necessary for several of its applications operational functions. However, quality DSSE typically suffers from a lack adequate/accurate measurements. Recently, electric utilities have started install fairly accurate meters throughout their networks, which create an opportunity achieve higher DSSE. signals...

Average-value modeling (AVM) provides an efficient way to study power electronic systems in large- and small-signal senses. This paper presents a new reduced-order AVM for dual-active-bridge dc-dc converters. The proposed model considers the conduction transformer losses as well input/output filters, which may be very useful system-level studies. Based on large-signal AVM, control-to-output transfer function are also derived. is compared with full-order generalized average detailed...

State-space average-value modeling of pulsewidth modulation converters in continuous and discontinuous modes has received significant attention the literature, various models have been developed. This paper presents a new approach for generating state-space model. In proposed methodology, so-called duty-ratio constraint correction term are extracted numerically using detailed simulation expressed as nonlinear functions duty cycle fast state variable. The parasitic effects circuit elements...

Modeling and simulation of photovoltaic (PV) power systems have become increasingly important with wide acceptance integration solar energy in modern electric grids. The transcendental nonlinear equations describing the PV generator, which are coupled detailed switching models electronic converters, generally result slow inefficient simulations, especially when long-term analyses required. This paper focuses on simple efficient modeling approaches that suitable for large system analyses....

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...

Induction motor drive systems fed with cables are widely used in many industrial applications. Accurate prediction of terminal overvoltage, caused by impedance mismatch between the long cable and motor, plays an important role for dielectric insulation optimal design dv/dt filters. In this paper, a novel modeling methodology investigation long-cable-fed induction overvoltage is proposed. An improved high-frequency equivalent circuit model developed to represent behavior time-...

Torque ripple reduction has become an active research area for permanent magnet synchronous machine (PMSM) drives. This paper presents a novel torque method based on harmonic current control. In the proposed method, optimal solution model with minimum stator resistive loss is derived in rotor reference frame (RRF). The currents are injected by controller (HCC), wherein magnitude of defined as variables. To estimate currents, also utilizes least mean square (LMS) adaptive filter (AF),...

A new average-value model of a rectifier circuit in synchronous-machine-fed system is set forth. In the proposed approach, proper state synchronous machine qd-rotor reference frame used, whereas rectifier/dc-link dynamics are represented using suitable transfer function and nonlinear algebraic functions that obtained from detailed numerical averaging. The compared to simulation as well measured data shown be very accurate predicting large-signal time-domain transients small-signal...

Brushless dc (BLDC) motors controlled by Hall-effect sensors are widely used in various applications and have been extensively researched the literature, mainly under assumption that Hall ideally placed 120 electrical degrees apart. However, this is not always valid; fact, sensor placement may be significantly inaccurate, especially medium- low-precision BLDC machines. This paper shows misplaced lead to unbalanced operation of inverter motor phases, which increases low-frequency harmonics...

The electromagnetic transient programs (EMTP-like tools) are based on the nodal (or modified nodal) equations that enable an efficient numerical solution and, subsequently, fast time-domain simulations. state-variable-based simulation programs, such as Simulink, also used for studying dynamics of electrical systems. Both offline and real-time versions these two types tools widely by researchers engineers in industry academia to study phenomena power systems with rotating machines. This paper...

The proliferation of technologies operating on dc power has motivated the system planners toward integration and ac grids. optimal flow (OPF) analysis is widely used to determine economically efficient points OPF problem in ac-dc grids a non-convex optimization due nonlinear equations constraints imposed by converters. In this paper, we study address non-convexity problem. objective jointly minimize generation cost losses lines subject constraints, limits voltages line flows, We use convex...

Time-domain simulation (TDS) is the most accurate and reliable method for solving transient stability problem. This approach relies on solution of nonlinear differential-algebraic equations (DAEs) using numerical integration, wherein a system solved at each integration time step. Very DisHonest Newton (VDHN) one fastest available approaches in TDS. However, VDHN does not guarantee convergence its sequential nature makes it difficult to take advantage multicore processors. paper presents new...

Brushless dc motors controlled by Hall-effect sensors are used in variety of applications, wherein the Hall should be placed 120 electrical degrees apart. This is difficult to achieve practice especially low-precision motors, which leads unsymmetrical operation inverter/motor phases. To mitigate this phenomenon, an approach filtering Hall-sensor signals has been recently proposed. letter extends previous work and presents a very efficient digital implementation such filters that can easily...

Many power electronic systems require dual-active-bridge (DAB) converters with ultrafast dynamic response. This paper presents a load-feedforward control design for DAB current-mode modulation, which can enhance the response to fast load transients and current-reference step changes. A simplified nonlinear feedforward formula (NFF) linear (LFF) are proposed, be selected depending on required accuracy (and acceptable computational complexity). The performance of converter operating in voltage...

This paper presents modeling and control design of a wind-hybrid power system that includes battery storage dumpload. The proposed scheme is based on the Takagi-Sugeno (TS) fuzzy model linear quadratic regulator. TS expresses local dynamics nonlinear partitioned into sub systems by linguistic rules. A possibility auto-regression presented provides optimally observed time series. controllers for each are designed In simulation study, controller compared with conventional proportional-integral...

This paper re-examines the three synchronous machine modeling techniques used for electromagnetic transient simulations, namely, qd model, phase-domain and voltage-behind-reactance model. Contrary to claims made in several recent publications, these models are all equivalent continuous-time domain, as their corresponding differential equations can be algebraically derived from each other. Computer studies of a single-machine infinite-bus system demonstrate that unsymmetrical operation power...

Electric power distribution systems of many commercial and industrial sites often employ variable frequency drives other loads that internally utilize dc. Such are based on front-end line-commutated rectifiers. The detailed switch-level models such rectifier can be readily implemented using a number widely available digital programs transient simulation tools, including the Electromagnetic Transient (EMT)-based Matlab/Simulink. To improve efficiency for system-level studies with large...

With the increasing popularity of plug-in electric vehicles (PEVs), they will be able to help power grid by providing various ancillary services. In fact, recent studies have suggested that PEVs can participate in frequency regulation. this paper, we consider offering both, i.e., combined, and voltage regulation PEVs. regard, first investigate a set constraints need taken into account on PEVs' active reactive flow offer Next, formulate two joint optimization problems, based different pricing...

Brushless permanent magnet (BLPM) motor drives based on Hall sensors have received extensive attention in the literature and are widely used many applications. However, most of available published controllers assume that signals always available, which is not true if any faulted. In this paper, several fault-tolerant control schemes for BLPM proposed. The methodology fault diagnosis its classification, subsequent signal reconstruction. Simulation experimental results demonstrate...