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.
Nowadays, the penetration of Renewable Energy Sources (RES) in electrical networks is growing significantly. In spite of many problems it introduces, the connection of RES in the subtransmission systems also gives the opportunity of exploiting them for the benefit of the network. In this paper, this is done for islanding conditions and a Genetic Algorithm (GA) based procedure to make a stable islanded...
Recently, a massive focus has been made on demand response (DR) programs, aimed for electricity price reduction, transmission lines congestion resolving, security enhancement and improvement of market performance. The paper develops a method for optimally selecting the locations of DR programs in the network together with their capacities to achieve the maximum technical benefits derived from the...
The past decade has seen a dramatic change in the manner in which the power industry is organized. It has moved from a formerly vertically integrated and highly regulated industry to one that has been horizontally integrated in which the generation, transmission and distribution are unbundled. In a deregulated environment, Congestion in the transmission lines can be relieved by one of the two congestion...
The power system is said to be in a state of congestion whenever the physical or operational constraints in a transmission network become active. In a deregulated environment, congestion in the transmission lines can be relieved by one of the two congestion management methodologies viz. cost free and non-cost free methods. In this paper, congestion is relieved by using cost free method and is reduced...
This paper presents an strategy approach to solve the optimal power flow (OPF) problem for reactive power dispatch which generally requires many power flow calculations. Artificial neural networks are employed to learn in an offline mode and substitute the role of power flow in the OPF which is formulated as a mix integer nonlinear optimization with network loss minimization as the objective. This...
Deregulation in power industry has made the reactive power ancillary service management a critical task to power system operators from both technical and economic perspectives. Reactive power management in power systems is a complex combinatorial optimization problem involving nonlinear functions with multiple local minima and nonlinear constraints. This paper proposes a practical market-based reactive...
Optimal load-shedding during contingency situations is one of the most important issues in planning, security, and operation of power systems. Load-shedding is necessary to prevent phenomena such as voltage collapse and line over load which may lead to cascade outages and then black-out. In this paper, a new optimal load-shedding approach is presented. One of the important specifications of this method...
Optimal load-shedding during contingency situations is one of the most important issues in planning, security, and operation of power systems. Load-shedding is necessary to prevent phenomena such as voltage collapse and line over load which may lead to cascade outages and then black-out In this paper, a new optimal load-shedding approach is presented. One of the important specifications of this method...
This paper presents unit commitment considering security-constrained optimal power flow (UC-SCOPF) by using Lagrangian relaxation with genetic algorithm (LRGA). The UC from LRGA is checked with optimal power flow (OPF) to ensure power transmission. Under normal operating state, UC may not satisfy system operating constraints in OPF and hence committed units must be adjusted to take into account those...
Load shedding is the last-resort tool for use in an extreme situation arising due to generating power deficiency and the consequent drop in power system frequency, which lead to a system collapse. Load shedding becomes a common practice for electric utilities around the world. To be effective, load shedding should be simple, rapid, and decisive. This paper deals with the problem of using optimal load...
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.