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.
Several techniques have been developed to estimate the load parameters in power systems. Most of the algorithms mainly focus on estimating the parameters for offline studies. With ongoing smart grid development, high-resolution data at fast rates are available to allow load modeling in real-time. This paper addresses the challenges in online estimation of the load parameters using Phasor Measurement...
Approximate analytical solution of linear or nonlinear ordinary differential equations (ODE) can be obtained by Adomian decomposition (ADM) method. The nonlinearities in the ODEs are approximated by Adomian polynomials and a rapidly convergent sequence of approximate functions will be obtained as a solution. The ADM is widely used for numerical simulations of real-world systems in the applied sciences...
Islanding of micro-grids is inevitable to improve the reliability of the system and hence this paper proposes a new methodology for adaptive re-configuration and islanding of micro-grids based on the knowledge of domains and commons of the distributed generators (DGs). The DGs are modeled with Automatic Generation Control (AGC) and Automatic Voltage Regulator (AVR) loop so as to regulate the frequency...
Functioning the hydroelectric pumped storage power plant in condenser regime for network stabilization is a common practice. During this operation, hydroelectric machines (doubly fed synchronous machine and doubly fed asynchronous machine) are influenced by various power quality perturbations causing failure to the system. This paper investigates the electro-thermomechanical effects on hydroelectric...
The paper demonstrates phasor and time domain hybrid simulation in real-time. A 55bus distribution grid is simulated in phasor domain and a solar photovoltaic with battery storage and some residential loads are modeled in time domain. This hybrid simulation is achieved using OPAL-RT Technologies real time solution called ePHASORsim for phasor domain and eMEGAsim for the time domain simulation. In...
In this paper, the IEEE-specified generator models such as the equivalent circuit (EC) models and the operational inductance (OI) models are compared to analyze the influence of the differences in the standard transfer functions among these models on the large-disturbance rotor-angle stability (or transient stability) of the power system. The large disturbances such as unsymmetrical and symmetrical...
The control and management of AC and DC microgrids is a major area of research addressing some of the key challenges like the integration of renewable energy sources (RES), source optimization, and stability issues etc. Numerous microgrid control strategies have been proposed and examined earlier. However, the control becomes even more susceptible to instability due to the participation of intermittent...
This paper investigates the effect of reconfiguration and network type (mesh/radial) on small signal stability margin of a droop-based islanded microgrid. A low voltage microgrid and standard IEEE 33 bus system (with three and five sources) are considered for study. From eigenvalue analysis and root locus plot, it is found that the reconfiguration and network type has significant effect on small signal...
In this paper, the design of a pressure retarded osmotic (PRO) power system and its basic operational model is presented. In the proposed system, power is generated (at estuaries where the river meets sea) due to the difference in salt concentration between the water sources. A hydro-electric power system is designed and emulated in real-time for isolated loads up to 12 kW power. The emulator provides...
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.