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Managing congestion in transmission lines with continuous power flow in deregulated power system is a complex task. For maintaining overall security and reliability of the system it is to be ensured that transmission lines are loaded below their thermal limits. Congestion management includes technical as well as economic issues. Rapid transactions of power through transmission lines lead to change...
The installed power capacity of grid-connected photovoltaic (PV) systems has increased exponentially around the world. The size of each unit is also increasing as they are becoming more affordable. The grid is a highly non-linear system. Hence, the grid disturbances affect the output of the solar PV systems. This paper presents a study of the effects of grid disturbances such as switching of loads,...
In this paper, a novel application of Artificial Neural Networks (ANN) is deployed to prevent blackout in a microgrid after N-1-1 contingency condition. In fact, microgrids are vulnerable to disturbances and abnormal conditions due to their inherent small inertia. Therefore, stability of microgrids after a disturbance turns into a challenge in power systems. The key contribution of this paper is to...
To enable greater innovation in power systems, our research seeks to create entirely fictitious synthetic power system networks that capture the functionality, topology, and defining characteristics of the actual U.S. transmission system, and thus provide realistic test cases for research, without revealing any sensitive information. Creation of these models relies only on publicly available data...
This paper describes optimal scheduling of large-scale price-maker energy storage and revenue maximization for storage owners. With the penetration of storage eminent, the sizing and scheduling of the storage system must be studied to fully benefit from this enabling technology. Energy storage systems are attractive for providing various services to the electrical grid. Energy arbitrage, being one...
Deregulation of electric power system has brought complexity in the system, competition among the electricity sellers and buyers which further creates overloading in transmission lines. Congestion occurs when undesirable transaction occurs through transmission lines during the transportation of electricity from generation to load centre. It is the duty of Independent System Operator (ISO) to ensure...
Recently the electrical Power quality (PQ) has become a main concern for both utilities and customers because the load side on the costumer side gets affected and may get damage. This paper presents a discrete wavelet transform (DWT) based technique for the detection of power system operational events and power quality disturbances associated with these events. The power quality disturbances associated...
The most important direction in development of electric power industry is the use of renewable energy sources. In mountain areas with their high mountain rivers, construction of high-efficient small hydropower plants (SHP) is certainly effective. Based on the example of the Fasnalskaya SHP, the paper provides the scientific and technical basis for calculation of operation and management of small HPPs,...
Electric power generation from oscillators under wave strikes and direct power transference to an overhead transmission line are proposed by controlling magnetic field along vibration manipulation function (VMF). In the system, we use the long overhead transmission line, which is horizontally hang on linearly allied towers along seashore. Each tower has a rigid pendulum or float oscillator, which...
We consider optimal power-flow calculations based on statistics (means and variances) of wind-power that are assumed known hour ahead. In real-time, adjustments of these calculations to the true wind power amounts have been proposed using affine control and chance constraints on generation and transmission [1]. We study how correlated wind power sources affect the optimized power plan and cost. We...
The SMaRTS model, Scheduling Maintenance for Reliable Transmission Systems, is developed to schedule transmission line maintenance requests optimally and centrally at the central dispatcher (CD) level. The SMaRTS model promises up to 4% production cost savings by solely shifting the maintenance to an optimal time frame for the system. The model is developed to co-optimize generation unit commitment...
The issues concerning testing and verification of the correctness of differential and polarizing circuits are described and discussed in this guide. The intention of this guide is to help the reader to detect errors in the wiring of protective relays that might cause erroneous operations of protection systems. It is essential to follow systematic testing procedures and record the observations in a...
In this paper, effect of Thyristor Controlled Series Compensator (TCSC) on Social Welfare function has been studied. Particle Swarm Optimization (PSO) centred procedure has been proposed to get optimal place and setting of TCSC to exploit Social Benefit. In addition, the impact of optimally sited TCSC on its size and system losses has been explored. The efficiency of anticipated methodology has been...
Contingency analysis is an integral part of modern energy management system. Traditionally, contingencies are analyzed to check a predefined, deterministic set of limit violations. Contingencies are then ranked according to the severity of the violations. However, this approach treats all contingency events equally likely; as far as the probability of occurrence is concerned. This paper describes...
Market Power is one of the major issues present in deregulated power system. Some of the participants game the constraints to gain large market power which results in inefficiency, higher costs and low consumer benefit. The paper discusses the market power, its analysis and mitigation technique. Nash Equilibrium is used in this paper to mitigate the market power. Two cases are discussed in this paper;...
The solution to the well-known loss allocation problems in interconnected power networks has usually been through power-flow analysis. This power-flow based approach is computationally intensive and the results may not converge for large practical power systems. This paper, therefore, explores an alternative approach to solving this problem using the Inherent Structural Characteristics Theory (ISCT)...
This paper proposes an optimal transmission expansion planning (TEP) which is based on determining share of each line in merchandizing surplus (MS) of system, determining by Independent System Operator (ISO). The more share of a line in MS of system denotes the priority of a line for expansion. The procedure of determining MS of each line in a power system is based on determining the MS share of each...
As a response to economic growth, electric power utilities installed many electric power facilities to meet power demand. However, these facilities have aged and should be replaced in the near future. Moreover, after the Great East Japan Earthquake, significant power flow changes in power system would likely to happen. Therefore, for electric power facilities planning, it is necessary to solve such...
Smart grid, modernization of electrical power system that is recognized globally as a vision to achieve a self-automated electrical network that is flexible, accessible, reliable and economical. With the integration of distributed and renewable generation into the transmission network, power system restoration faces new challenges. As the demand for power increases, the ability to perform restoration...
The electrical energy generation companies are always tried to improve the system performance through reducing the active power losses and that lead the fuel cost to be reduced too. One of the ways is by incorporating Distributed Generation (DGs). DGs are becoming more prominent in transmission systems due to the increasing demand for the electrical energy and their location will have an impact on...
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