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Power systems are nonlinear dynamic systems, in which the chaotic modes occurrence is possible. Chaotic modes are potentially dangerous for the equipment, the system stability and survivability as a whole. We consider the possibility of timely chaotic modes detection of electric power systems due to the system parameters bifurcations. The research task and early detection of such modes are important...
This paper presents novel of power system stabilizer in which intend to investigate and observe the oscillation due to disturbances then define power angle difference on South Sulawesi grid. The symmetrical three phase fault and single phase fault to ground have been implemented and results show that the 150 kV of South Sulawesi grid tend to reach the limit of transient stability and then subject...
With the vigorous development of new energy sources, wind power generation technology has been developed rapidly. Due to the reverse distribution of wind energy resources and load centers, large-scale wind power transmission is inevitable. Using series capacitor compensation technology is an effective measure to complete large-scale wind power transmission, but may induce sub-synchronous oscillation...
With the development of the smart meters, demand response (DR) is able to provide fast ancillary services, such as frequency control. Some recent studies demonstrated that DR can perform like thermal generators in the frequency control. However, little attention has been paid to DR's effect on the electromechanical oscillations of the power system. Fast-response DR can not only affect system frequency,...
A power oscillation damping controller of the multi-terminal direct current (MTDC) system is proposed in this paper. In a MTDC system, due to the interaction between different generators, interarea oscillation has shown great influence on the system stability. To damp the interarea oscillation, a damping controller for MTDC system is proposed in this paper. Firstly, the topology and control strategy...
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...
The aim of this work is to present a novel fuzzy slide mode control (FSMC) to extract a maximum power point (MPP) of the photovoltaic (PV) generator. This technique allows tracking the MPP consequently for the different operating condition of radiation and temperature. The FSMC is simulated with Matlab/Simulink environment and compared with the perturb and observe (P&O) method. The tests results...
Due to with the actuality of the task of interconnection of non-synchronously operating alternating current energy systems, an experimental comparison of the interconnection devices models, which implement various methods of operation of these devices, is required. Therefore, a stand is needed, that allows conducting experimental studies with the specified models of devices. The basis of the stand...
Developing a test environment for smart grid forms an indispensable stage to the realization of the next generation of the electricity grid. The coupling of the physical power system and its associated communication network makes modern power grid a typical cyber-physical system. In this paper, a real-time power system was simulated in RTDS and the communication network in NS-3. This test bed includes...
This paper presents a relaxation oscillator that utilizes a supply-stabilized pico-powered voltage and current reference (VCRG) to charge and reset a chopped pair of MIM capacitors at sub-nW power levels. Specifically, a temperature- and line-stabilized reference voltage is generated via a 4-transistor (4T) self-regulated structure, the output of which is used to bias a temperature-compensated gate-leakage...
The impact of static generators on power system small signal stability is evaluated by means of micro-synchrophasors collected in a distribution system using a class A Power Quality recorder that also functions as a Phasor Measurement Unit. Distributed generation of renewable energy could be a possible concern to the traditional power system where inertia of rotating generators is available during...
The purpose of this work is to find the optimal location of sliding mode control and power system stabilizer in order to damp electromechanical oscillations in the power system using the residue method. The proposed control is evaluated performing several simulations on a modified version of the 39-bus New England power grid. A modal analysis is performed at the test system in order to evaluate numerically...
Oscillations are inherent to power systems and the analysis of such phenomena is a fundamental issue for understanding the dynamical behavior of power networks. Knowledge of the system natural frequencies and its associated damping ratio, is useful information for understanding the system performance after being subjected to a disturbance. Topological changes in the transmission network of electrical...
One of the most critical situations in the operation of medium and low speed synchronous generators appears when they are subjected to torque imbalances. This could be the case of internal combustion engines driven generators. In these engines, torque has a periodic oscillation due to variations in the combustion process and pressure development between cylinders. Consequently, a fuel excess or a...
Self-timed Ring based True Random Generators (STRNGs) extract randomness from the jitter of events evenly propagating in a Self-Timed Ring (STR) oscillator. Security of such generators is primarily based on an entropy assessment: an accurate model of the minimum entropy per output bit with physical measurement of the noise source. This assessment is reinforced with both entropy source monitoring and...
A novel method for stabilization of a timing system based upon VCTCXO (Voltage Controlled, Temperature Compensated Oscillator) is proposed. A low-cost, low-power-consumption system developed features relative frequency stability as high as 5×10−9 as well as low sensitivity to instant jumps of temperature.
In this study a numerical cryptanalysis of a random number generator (RNG) which is built on a continuous-time chaotic oscillator is introduced. In order to scrutinize the security weaknesses of the RNG, a master-slave synchronization approach is presented as the basis of an attack scheme. By proposing this attack scheme, it is aimed to verify whether there exist any possibility to divulge the hidden...
Ultra-low-frequency oscillation with almost constant amplitude is a kind of frequency oscillation in power system. It has occurred in several hydro-dominant islanded power systems. With the nonlinearity of hydraulic turbines, a nonlinear model of power system is built in the paper. Stability and performance of both linear and nonlinear models are analyzed and compared. Particularly stable limit cycle...
A simultaneous coordinated design of PSS and variable impedance devices such as TCSC and SVC for damping the power system oscillations and enhancing the stability in multi-machine power systems is presented in this paper. To achieve the best control results, adaptive velocity update relaxation particle swarm optimization (AVURPSO) algorithm is used to optimize the parameters of PSS and SVC and TCSC...
The models of solid-state sources of chaotic oscillations (chaos generators) of various complexity order are considered in the present paper. The investigated chaos generators are intended for transmitting devices of wireless personal communication networks. A technique for testing of numerical simulation methods of chaos generators is proposed. This technique allows to choose the most accurate numerical...
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