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This paper considers a framework of electrical cyber-physical systems (ECPSs) in which each bus and branch in a power grid is equipped with a controller and a sensor. By means of measuring the damages of cyber attacks in terms of cutting off transmission lines, three solution approaches are proposed to assess and deal with the damages caused by faults or cyber attacks. Splitting incident is treated...
Transient stability analysis is an indispensible part of utility system planning. At present, it still relies on the classical numerical integration methods which are accurate but time consuming for large power systems. This paper proposes Gear's method and the block method to reduce the computational cost. These methods are used to simulate the IEEE 39 Bus system. The classical model representation...
This work presents a case of integration of a small signal stability simulation algorithm in an Automatic Disturbance Analysis software. The small signal stability simulation algorithm is presented in a step by step solution of a chosen case. The algorithm is available for free download1, in order to allow others engineers to reproduce the results and to discuss the developed code. The algorithm was...
The correct analysis of power system transient stability is of great significance to the safe and stable operation of power system and the construction of smart grid. Based on the basic theory of Extreme Learning Machine (ELM), this paper studies the transient stability of power system. Firstly, the simulation model is built to simulate power system for obtaining data sets. Then, the implementation...
In this paper we present a new method for creating polynomial solvers for problems where a (possibly infinite) subset of the solutions are undesirable or uninteresting. These solutions typically arise from simplifications made during modeling, but can also come from degeneracies which are inherent to the geometry of the original problem. The proposed approach extends the standard action matrix method...
This paper presents a complete analysis, design and implementation of an enhanced space vector pulse width modulation (SVPWM) control for six-phase to three-phase grid connected matrix converter. The matrix converter (MC) is designed based on 18 bidirectional switches in order to interface a high performance fault tolerant multiphase permanent magnet synchronous generator (PMSG) to the main utility...
The photovoltaic (PV) source simulators are widely used to test solar inverters, evaluate their control algorithms and study their grid integration issues in the laboratory settings. Many commercial programmable dc power supplies can be re-programed to be PV simulators. Due to the bulky output dc capacitors, the dynamic response and the bandwidth of these PV simulators are significantly limited, which,...
In order to overcome the limitation of transient stability analysis (TSA) which is unable to describe the non-fundamental or asymmetry characteristics of AC/DC power systems, electromagnetic transient modeling method with high efficiency is urgent for large scale power systems. According to actual HVDC converters, this paper first simplifies the valve group model as well as the transmission line model...
A detailed conducted EMI prediction model of the three-stage starter/generator is proposed in this paper to analyze the EMI during the starting procedure. The main generator and exciter high-frequency (HF) models are represented by multistage LRC networks. The traditional low-frequency (LF) models in d-q reference and the corresponding control strategies are combined with the HF models through the...
In far-off regions without a connection to the main grid, primarily diesel generators are used for the power supply. However, hybrid energy systems such as PV-diesel-battery systems have a high potential to reduce CO2-emissions and fuel costs. As a challenge, on the one hand, smart dispatch strategies are required to compensate the limited part-load capacity of diesel generators and the volatility...
This paper has the focus to identify the unknown parameters of solar photovoltaic generators in real time, through the application of a new proposed technic. The identification process is discussed with details, about the four steps of identification. In this regard, the first step explain the experimental data acquisition work, to obtain data from real photovoltaic system. For the second step, a...
The paper presents multi-purpose mobile solar generator with modular structure, which provides power supply for both, single and three-phase consumers, in symmetrical, as well as unsymmetrical conditions. The additional feature of this device — pressure control in irrigation systems with three-phase centrifugal pump, is analyzed in details. The concept of irrigation systems based on the use of sprinklers...
We present a type of high performance contact-separation mode triboelectric generators (TEG). The TEGs consist of a poly(vinylidene fluoride) composite with embedded barium titanate nanomaterial (PVDF-BaTiO3) and polyamide-6 (PA6). Additional BaTiO3 nanomaterial in the PVDF increase the relative permittivity and piezoelectric effect, thus enhance the performance of the TEGs. Owing to the increased...
In this paper we explore the dynamic chaos generator as a dynamic system described by a vector of its state values. The transmitted signal is introduced into the structure of this generator by parametric modulation of its parameters. The source reconstructs the dynamic system, after which a one-dimensional realization of the oscillation process is introduced. Further, the observer restores the initial...
This paper determines the optimal power capacity installed for Run of River Hydro Power Plant (RORHPP). This is necessary in order to obtain an effective and efficient RORHPP, because the installed capacity will determine the investment and the energy produced. If the installed power capacity is too high, the investment cost will also be high, but if the installed power capacity is too low then the...
This paper proposes a mixed-integer quadratic programming (MIQP) model for optimal day-ahead distribution networks dispatch considering Wind Generators (WGs) and topology reconfiguration. Firstly, linearized current injection model is introduced for generators by a series of approximations. Then the day-ahead Switching Operations (SOs) of reconfiguration could be calculated in a linear form based...
This paper focuses to improve wind turbine systems efficiency, in other words, to maximize the output power delivered by the wind turbine. To do this it is necessary to have a good controller. In this study, we use a nonlinear synergetic controller. Synergetic control theory is applied to reach the maximum power point tracking (MPPT) of a variable speed energy conversion system. A comparison with...
In this paper, we reported a thermomagnetic-actuated gripper with a piezoelectric–pyroelectric sensing readout of gripping states and forces. The gripper consists of two CuBe cantilever beams, a Gd sheet, NdFeB hard magnets, a thermoelectric generator (TEG), a piezoelectric–pyroelectric PZT sheet, and a polymer-polymethyl methacrylate base. When TEG cools the Gd sheet lower than its Curie temperature,...
Hydrokinetic river (HKT) and photovoltaic (PV) panels systems are of the promising technologies to be used for remote rural electrification. In rural areas with access to water and solar resources, renewable generation is a promising option for electrification. This paper presents a study by two sizing methods for a stand-alone hybrid generation system integrating renewable energies (PV panels and...
This Paper carried out three phase and single phase short circuit tests and verified the security and stability of large scale wind farms integration on Rongcheng power station. Including location and type of short circuit, system operation conditions and measurement of date, summarized the main work between the wind farms short circuit test. Following the ideas of “unit level-wire level-wind farm...
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