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Wind power plant installations continue to increase worldwide because it is a kind of renewable and harmful emissions-free energy source. The increased capacity of wind power needs the new strict requirements related to the grid connections of wind generators. The requirements defined in the grid codes can be states as reactive power control, fault ride-through (FRT) capability of the wind turbines,...
In this paper the authors present an analysis of the command with rectangular (trapezoidal) printed currents of a permanent magnet synchronous motor (PMSM) for driving a bicycle. Constructive details and materials are presented. It also presents the results obtained from numerical simulations of the studied permanent magnet synchronous machine for its operating as a generator. In this operating regime,...
In view of the condition and demand of HulunBuir power grid, it could play an important role in enhancing its restoration speed to find or build new power source applied for black-start. Firstly, a black-start scheme is proposed for it, in which the East Hailar Thermal Power Plant in Hailar district can be started through using the Daliang wind farm configured with high-capacity battery energy storage...
Blind recognition of error correcting code over GF (2) have been studied intensively in past few years, however, few works have been involved the case of non-binary codes. In order to approach the problem, a novel method for blind recognition of Reed-Solomon (RS) codes is proposed in this paper, which is based on Galois Field Fourier Transform of code polynomial. Moreover, theoretical analysis of...
This paper addresses the issue of selecting architecture of smart grid that can be used so as to test applications and uses cases related to services. Most existing architectures are based on the NIST conceptual model that defines seven high-level domains (Bulk Generation, Transmission, Distribution, Customers, Operations, Markets and Service Providers), which is not suitable with recent progress...
The paper presents a comparison of the power output of wind driven generators coupled to active and passive converter circuits at certain site in Bulgaria. A table compares the power output difference expressed in percent. Actual wind resource data gives the opportunity to have evaluation and analysis at three different heights. Advantages of active and passive control are derived and summarized....
This paper deals with energy and economic analysis of grid-connected photovoltaic (PV) systems with storage. According to the current Italian market rules, the first goal is to calculate the capacities of PV systems and batteries corresponding to the cost-optimal solution. Then, cost-effective solutions are investigated to maximize self-consumption, minimizing grid injections. Simulations are performed...
In this paper are presented the simulation results of the locomotion of MECABOT, a Modular Robotic System designed and developed in the Militar Nueva Granada University. A Webots controller file is developed starting from the equations that describe the movement of MECABOT chain architecture, considering the caterpillar and snake configurations. The variation of the parameters of the equation in the...
This paper describes under frequency based islanding scheme of the Rawatbhatta Atomic Power Plant (RAPP) situated in Rajasthan. The islanding power system consists of seven generators having total 780 MW generation capacity. On the basis of simulation studies, under frequency based islanding scheme have been designed. Under frequency based islanding relays are placed at interconnecting points. Further...
This paper deals with the creation of models to simulate the signal contours of multiple-input multiple-output (MIMO) processes. The simulated signal contours are synthesized by a wavelet-based generator. The parameters necessary to adjust the contour generator are predicted from the machine settings. The predictor coefficients for the generator parameters are estimated from a set of designed experiments...
Gain scheduling for the widely-used NREL 5-MW proportional-integral blade pitch controller can be implemented either by the original documented method (Integrate First): integrate the generator speed error before multiplying by the gain-scheduling correction factor, or the Multiply First method: multiply the generator speed error by the gain-scheduling correction factor, then integrate. The results...
Decoding of Raptor codes consists of decoding of both the LT part and the precode part of the codes. When LT decoding is performed, a scenario may arise where the message passing-based decoding process is unable to provide non-zero log-likelihood ratio (LLR) updates to a fraction of input symbols even if it is mathematically possible to do so. The problem is even more critical for codes with short...
This article presents a case study and comparison of simulations carried out by SimPy 3.0 of Python module and OMNeT++ tool to explore the performance. The target of this comparison is in particular configuration of network for future steps what tools would be good to use. Two simple models of a network were created with Python and C++ language.
Some aspects of simulation of the energy systems for full-scale mode simulator, staff training and teaching in order to develop its skills of complex accidents rapid elimination at the Ukrainian power supply systems are considered.
The optimization of the braking energy recovery helps to enlarge the range of an electric vehicle without an extension of the accumulator capacity. In currently available electric vehicles different recuperation strategies with diverse possibilities of activation are implemented. In this paper, several recuperation strategies are illustrated and discussed. Based on a simulation model energy savings...
Factory acceptance tests performed on High Voltage Direct Current (HVDC) transmission apparatus usually involve the application of high direct voltage and switching impulse voltage in separate withstand tests used to qualify the insulation system. However, the actual stress subjected to the equipment insulation system while in-service on the HVDC transmission system, is a switching surge transient...
In this paper we study blind recovery methods for identifying the parameters of a convolutional code from an intercepted bitstream. It is assumed that the interceptor has no prior knowledge about the encoder and the recorded bitstream is noisy. The goal is to obtain the following parameters of convolutional code (i) number of inputs (ii) number of outputs (iii) constraint length of the convolutional...
The most common use of the high voltage impulse generators is probably in the high voltage laboratories. They produce output waveforms of desired parameters that are usually used for testing high voltage equipment. These output waveforms should fulfill some requirements that are strictly given by the standards. However, these standardized parameters of the output waveform can be affected by parameters...
Non-pharmacological and non-surgical transcranial stimulation of the nerve function may provide new opportunities in evaluation and treatment of cranial nerve diseases. Stimulation can additionally help to uncover the mechanism of various brain processes by temporarily altering the normal function of healthy brains. Transcranial ultrasound stimulation(TUS) is in the early stages of human applications,...
Various Demand Side Management (DSM) approaches have been developed the last couple of years to avoid costly grid upgrades. However, evaluation of these DSM methodologies is usually restricted to a use-case specific example, making comparison between different DSM approaches hard. This paper presents a novel, open source, load profile generator to evaluate and compare DSM approaches. In addition to...
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