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Load forecasting is an important component in the economic and secure operation of the restructured power system energy management. This paper presents the use of an artificial neural network to half hourly load forecasting and a day ahead load forecasting application. By using historical weather, load consumption, price and calendar data, a multi-layer feed forward (FF) neural network trained with...
The conventional electro-mechanical and static protective devices used for the protection of three phase Induction motors in Industrial applications normally employ separate and Independent overload, short circuit, earth fault and single phasing protective devices In the circuit breaker to take care of motor protection. The proposed all-In-one protection scheme Integrates these Into a single static...
For the vertically integrated monopolistic environment in the past, economic dispatch and Unit Commitment (UC) were defined as finding and scheduling generating units in order to minimize the total production cost of utility and constraints such as power demand and spinning reserve are met. These problems under deregulated environment, on the other hand, are more complex and more competitive than...
This paper present a PLC based learning tool for operation of three natural gas generator sets. The generators are modeled as three small motors installed in an experimental board in an undergraduate power engineering laboratory. All criteria for safe starting, synchronization, protection against electrical and mechanical faults of the generators are taken into consideration in the software used for...
In this paper, an innovative method is proposed to improve the performance of linear optimal control for mitigation of sub-synchronous resonance in power systems. This method is based on shifting eigenvalues of the state matrix of system to the left hand-side of s plane. It is found that this proposed controller is an extended state of linear optimal controller with prescribed degree of stability...
Reliability and quality are the two important facets of power system delivery. A power distribution system is considered to be reliable if all its customers get interruption free power throughout the year. The term power quality may be referred to as maintaining near sinusoidal voltage at rated frequency at the consumers end. In recent times the issues involved with power quality have generated a...
This paper presents an artificial neural network (ANN) based controller for multi-area Automatic Generation Control (AGC) scheme in a deregulated electricity market. A three layer feed forward neural network (NN) is proposed for controller design and trained with Back propagation algorithm (BPA). The ANN controller has been developed for multi-area system having Poolco, bilateral and mixed transactions...
Numerical relays offer increased functionality at lower cost, high reliability and long service life. These numerical relays play a significant role in the automation, protection and control of transmission lines in a substation. SCADA system for medium voltage substation includes a user interface called Human Machine Interface (HMI) and a number of remote numerical relays. This paper presents the...
Modern numerical relays often incorporate the logic for combined single and three-phase auto-reclosing scheme; single phase to earth faults initiate single-phase tripping and reclosure, and all the other faults initiate three-phase tripping and reclosure. Accurate faulted phase selection is required for such a scheme. This paper presents a novel scheme for detection and classification of faults on...
In this paper an easy planning method has been reported which provides the solution of radial distribution planning problem very quickly without using any classical optimization technique. A multi-stage decision process is developed where optimum feeder routes with proposed substations are obtained directly based on additional cost of connecting a line in first stage and the result in first stage...
This paper discusses about present status of TPL-Sugen in respect of generating units, associated evacuation network and existing commercial arrangement and further planning to go ahead keeping in consideration ABT implications, as when first unit of TPL-Sugen will be commercialized, its scheduling and accounting will become even more complex because firm and infirm power will simultaneously exist...
A new scheme to discriminate between internal fault current and inrush current of power transformer is presented in this paper. In the proposed method, space vector analysis of the differential signal and their time characteristic shapes in park's plane is used as a core classifier to discriminate between magnetizing inrush and internal fault of a power transformer. Conventionally, second harmonic...
On-line power system analysis enables to make power mode-related decision based on information available at real time. The quality of the studies and efficiency of power system operation are closely associated with the accuracy of the power system models. Accurate and quick decision based on analysis on real time data has been necessary for making operational plan under the deregulation of power system...
Electrical load forecasting in power system is a most basic requirement to facilitate the generation scheduling and is an important task for ensuring reliability and economic operation. All around the globe a large number of load forecasting procedures / tools are being used and most of these basically use the statistical data to project the demand on daily/ weekly/ monthly/ yearly basis. However,...
This paper deals with the control of voltage and frequency of an autonomous wind power generation based on isolated asynchronous generator (IAG) feeding three-phase four-wire loads. The proposed control scheme is using the synchronous reference frame (SRF) theory based current detection. The proposed voltage and frequency controller (VFC) consists of a three leg voltage source converter (VSC) with...
Growing demand for use of Information and Communication Technology (ICT) in ??technology for all?? concept has been attracted the attention of all academician and engineers to develop an ICT enabled system for each and every field. In the field of education, ICT enabled high voltage (HV) laboratory is an effective educational tool for all of the institutes those offer Electrical and Electronic Engineering...
This paper presents a framework for accessing efficiency analysis of State Owned Electric Utilities (SOEUs), which have been mainly responsible for the generation, distribution and transmission of electricity in India. Efficiency Performance of Thirty four state owned generation companies was evaluated using the Data Envelopment Analysis (DEA) for the time periods 2006-07. This efficiency performance...
This paper presents a new idea with in the evolutionary algorithms for solving the optimal reactive power dispatch problem. Loss sensitivity approach is developed and is used in each of the evolutionary algorithms such as differential evolution (DE), particle swarm optimization (PSO) and genetic algorithm (GA). The objectives are to minimize real power loss and to improve the voltage profile of a...
This paper develops bidding strategy for operating pumped storage power plant in a combined pool-bilateral market. 1/0/-1 mixed-integer programming model to account discrete tri-state operation of pumped storage plant is developed and multi-looping sequential optimization approach is used to solve the problem. Considering realistic case study, operating strategies for the pumped storage plant are...
Voltage flicker, a phenomenon of annoying light intensity fluctuation, caused by rapid change in industrial and domestic load such as saw machine operating periodically has been a major concern for supply utilities and customers in the vicinity. The sawmill current is of quasi-periodic with a frequency of about 10 Hz causing perceptible flicker. The FACTS devices like SVC's, STATCOM and Custom Power...
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