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.
Abstract-A new approach to ORPF (optimal reactive power flow) based on SFLA (shuffled frog leaping algorithm) is proposed. The algorithm approaches to solving ORPF problem are given. By applying the algorithm to dealing with IEEE 30-bus system, compared with the particle swarm optimization (PSO) algorithm and SGA(simple genetic algorithm),the experimental results show that the algorithm is indeed...
In a deregulated electricity market one of the most important tasks of independent system operator (ISO) is to manage congestion as it threatens system security and may cause rise in electricity price resulting in market inefficiency. In corrective action of congestion management schemes, it is crucial for ISO to select the most sensitive generators to re-schedule their real and reactive powers optimally...
In a deregulated electricity market transmission congestion occurs when there is insufficient transmission capacity to simultaneously accommodate all requests for transmission service within a region. One of the most important tasks of independent system operator (ISO) is to manage congestion as it threatens system security and may cause rise in electricity price resulting in market inefficiency....
This paper presents a new method for transmission loss allocation based on complex power flow tracing. Building on previous works of the author, the paper presents a generalized model for the transmission line, which is used as the building block for the complex power flow tracing algorithm. The developed line model is similar to the famous generalized circuit constants, ABCD, model. While the ABCD...
The connection of generators on distribution feeders may cause significant impact on the steady-state performance of the network. Quantification of the impacts on power losses, in a systematic way, is a difficult task due to the complexity of network operation since generators can operate with different lead and lag power factors and, occasionally, can inject variable active power on the network....
Recently, renewable energy such as wind turbine generator and photovoltaic system are introduced as distributed generators (DGs). Connection of a large amount of distributed generator causes voltage deviation beyond the statutory range in distribution system. Reactive power control of inverter interfaced with DG is one of the solutions against this problem. Additionally, reactive power control has...
This work presents a new approach for placement and dispersing of decentralized generation (DG) power in medium voltage distribution networks based on continuation power flow (CPF) method. The main objectives of the proposed method are to maximize the normal operation loadability (NOL) (i.e. the maximum loading which can be supplied by the power system while the voltages at all nodes are kept within...
Deregulation in electricity industry necessitates wide access to transmission networks that connect consumers and suppliers. As congestion in the transmission networks is a key obstacle to vibrant competitive electricity markets Thus; one of the most challenging problems for a deregulated power environment is how to handle the transmission congestion. The main objective of the transmission congestion...
This paper presents a direct transmission network cost allocation method by finding the coefficients of real and reactive power generations and load demands in the complex line flow. A mathematical model which clearly demonstrates the participation of each generator and each load in the line flow has been established. An attempt to calculate the locational marginal price (LMP) is done. Effectiveness...
Increased loads and customers demand from the distribution utility side by side with the deregulated environment have focused more light on distributed generation (DG) as an attractive option to defer transmission and distribution upgrading, and to support reliability and system performance. This paper discusses modeling of different types of DG and its integration in the distribution network using...
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.