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.
In deregulated power system, assessment and analysis of wheeling prices become a challenging task. In Indian power sector various network users are based on a regional postage stamp method for wheeling prices. But due to changed scenario, postage stamp method does not satisfy Indian electricity policy. It is because of non linear power flow plays an important role to decide wheeling prices across...
Providing high security and reliability for a power system is compulsory for a transmission service provider (TRANSCO) as this will affect the performance in terms of stability and economy. This can only be achieved by means of ancillary services like reactive power provision. However, to cover the cost of supplying such services, determination of appropriate methods for allocating the cost to consumers...
This paper presents a new model for the integrated maintenance scheduling (IMS) of generators and transmission lines, which is formulated as a high dimensional, mix-integer and highly constrained optimization problem. The advantage of the new model is that the number of integer variables is greatly reduced in comparison with that in the traditional IMS model in a large scale power system. Besides,...
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...
A metaheuristic technique for solving the short-term transmission network expansion and reactive power planning problems, at the same time, in regulated power systems using the AC model is presented. The problem is solved using a real genetic algorithm (RGA). For each topology proposed by RGA an indicator is employed to identify the weak buses for new reactive power sources allocation. The fitness...
This paper proposes a new method for probabilistic transmission network expansion planning with Controlled Non-dominated Sorting Genetic Algorithm (CNSGA-II) of multi-objective meta-heuristics (MOMH). Recently, power networks increase the degree of uncertainties due to new environment of power network liberations, the emergence of renewable energy, etc. As a result, the importance of improving power...
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...
Genetic algorithm (GA) has shown its promise in dealing with reliability evaluation of complex power systems. However, it may be computationally expensive due to its stochastic search mechanism coupled with the problem complexity. Especially, when each system state needs a load flow calculation to determine its status, the reliability evaluation process may take a long time. Parallel computation is...
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...
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.