The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
How to design an effective and efficient load-frequency controller (LFC) for a multi-area interconnected power system to improve its power quality is a challenging issue. In order to deal with this issue, this paper presents a novel distributed fractional-order PID (DFOPID) control method for the load-frequency control of each area by using an adaptive population-based extremal optimization (APEO)...
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,...
This paper presents a wind-driven DC power generation and control system modified by a doubly fed induction generator (DFIG), which stator is connected with a full-power diode rectifier to supply DC power to a stand-alone load and rotor is connected to the DC link with a PWM converter in charge of regulation of frequency and voltage on stator side. The transient character and behavior of current,...
Power system restoration takes place where power systems experience a blackout and might be splitted into several islands with limited number of black start units. The main challenge of the restoration process is to keep both frequency and voltage within allowable limits while restoring the network through energizing lines and transformers as well as load pickup. The load pickup scheme is determined...
The paper considers and substantiates the possibility of using induction motors with frequency regulation instead of special engine types for precision control of large antennas. The dynamic errors arising in control systems during the low Earth orbit (LEO) satellites trajectories tracking are investigated. The simulation results of the test trajectory tracking using different laws of frequency regulation...
This paper presents the possibility of using a point-to-point voltage source converter — high voltage direct current (VSC-HVDC) transmission system connecting offshore wind power plant (WPP) to the onshore grid as black start unit to initiate the restoration process for an interconnected electrical system after a large area system blackout. The onshore converter station (CS) provides voltage in order...
When learning different control related concepts and methods, simulation is often used as a training tool; but, it does not have some real time characteristics of implementation like dealing with coding and PC resources, supervision, and communications. In some cases, implementation cannot be carried away, since it involves hardware design and is expensive. The proposed solution in this paper involves...
The current design drivers for multi-cores, namely performance per watt, scalability and flexibility, make the Networks-on-Chip (NoCs) the de-facto on-chip interconnect. State of the art NoCs can exploit heterogeneous solutions and complex DVFS techniques to fulfill also the variability of the application requirements. Relevant showstoppers to the design of a truly flexible NoC fitting all the possible...
This paper presents an algorithm for speed ripple reduction of an oil cooler compressor. An oil cooler compressor is typically used for a machine tool to reduce thermal variation error at a processing area. However, mechanical vibration of a single rotary compressor should be reduced because it results in noise and stress on a pipe. Therefore, a real time ripple reduction algorithm is proposed to...
In order to address the economical dispatch problem in islanding microgrids, this paper proposes a criterion and a decentralized economical-sharing scheme. The criterion is to judge the optimal economical-sharing whether can be realized via the decentralized approach. Then an optimal decentralized economical-sharing scheme is proposed. This overcomes the limitations of traditional centralized control,...
This paper focuses on the simulation study of speed tracking control applied to the PMSM (Permanent Magnet Synchronous Motor). Previous works has presented the (d-q) model and the NDI (Nonlinear Dynamic Inversion) control has been used. A limitation of the speed tracking control versus frequency and amplitude is exposed and explained in order to introduce the performance of NDI control method. An...
This paper aim to a design of Proportional-Integral-Derivative (PID) controllers for two area power system with variation in the load. Currently, PID controller has been used to control in two area power system. The issue of tuning parameter and design a PID controller adaptive, efficiently and robust is still open. This paper presents an improved PID gain by Particle Swarm Optimization (PSO) Algorithm...
In this paper, the design of a proportional resonant (PR) controller for the packed U cell (PUC) 5 level inverter is presented. The objective of the presented work is to present a better solution for current control in grid connected application of the investigated topology. A suitable LCL filter is designed along with the PR control scheme for grid connection. Simulation is performed in MATLAB®/Simulink...
With the increase in load demand, generation should also be increased or interconnection of network must be done to ensure the quality of power generated and to feed the load. LFC is used for stabilizing the factors in the power system (i.e frequency and tie-line power) with the use of different controllers. A system using three sources of generation are used and simulated in MATLAB2015b
A 3 MHz, 48W Boost converter with high speed and high accuracy Peak Current Control Unit (PCCU) is presented. The Boost controller IC adopts a novel PCCU consisting of a fully differential open-loop operational transconductance amplifier (OTA) and a trans-impedance amplifier (TIA), which can minimize the delay and error of the whole control loop. In the PCCU, the compensated output of error amplifier...
This paper presents possible solution of fractional-order high-pass filter (FHPF) with electronically adjustable order between 1 and 2 and also with electronically adjustable pole frequency. It is based on well-known Follow-the-Leader Feedback (FLF) topology adjusted for utilization with operational transconductance amplifiers (OTAs) and adjustable current amplifiers (ACAs). This 3rd-order topology...
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...
EVs (electric vehicles) can be used as controllable loads and distributed storage devices. On the basis of power batteries, EVs can response to the power grid signals rapidly and accurately. They can provide ancillary services, such as peak shaving, frequency regulation services, etc. In this paper, the cycle life model of EV batteries is established based on four factors: ambient temperature, cycle-index,...
The interlinking converter in an AC/DC hybrid micro-grid plays a crucial role in the stable operation and power allocation of power system. A bidirectional droop control method for the converter is proposed, which measures the power demand degree of AC sub-grid and DC sub-grid according to AC bus frequency and DC bus voltage respectively, and determines the direction and magnitude of the converter...
This paper presents the solution of automatic generation control (AGC) problem of four-area interconnected power system including DFIG (doubly fed induction generator) wind turbine using gravitational search algorithm (GSA). The GSA is used to tune the gains of the speed as well as pitch angle controller of the DFIG wind turbine along with the proportional integrated derivative (PID) controlled interconnected...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.