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A new methodology for cost/benefit analysis of generation investments considering system constraints has been developed. The methodology proposes to address the uncertainties in generator outages, transmission failures and other system constraints. A sequential Monte Carlo simulation is used to simulate the random component states while subsequent generator commitment and/or load curtailment in each...
This paper presents a new technique for regulating grid-connected wind farms terminal voltage. The wind farm under investigation is assumed equipped with doubly-fed induction generators (DFIGs). The proposed technique is based on using the grid-side converter to regulate the farm's terminal voltage rather than using the rotor-side converter to achieve this task. Description for the studied system...
This paper presents practical solutions to mitigate the adverse effects on distance protection schemes when they are used to protect transmission networks that are compensated by shunt connected flexible AC transmission system (FACTS) controllers/devices. Two types of shunt-FACTS devices, static var compensator (SVC) and static synchronous compensator (STATCOM), are considered and designed to regulate...
This paper focuses attention on the concept of flatness-based feedback linearization and its practical application to the design of an optimal transient controller for a synchronous machine. The feedback linearization scheme of interest requires the generation of a flat output from which the feedback control law can easily be designed. Thus the computation of the flat output for reduced order model...
This paper describes a new perspective and online tool for transmission loading relief. Risk based multi-objective optimization methods are employed to reach the expected security level associated with the least cost. Weather-based contingency probabilities are used to compute the risk. A linear program with contingency constraints is implemented to achieve good tradeoffs between economy and security,...
Solar energy converter devices such as photovoltaic cells are very sensitive to instantaneous solar radiation fluctuations. Thus rapid variation of solar radiation due to changes in the local meteorological condition can induce large amplitude fluctuations of the produced electrical power and reduce the overall efficiency of the system. When large amount of photovoltaic electricity is send into a...
This is a summary of the presentation in the panel session "Power industry workforce of the future" for the 2007 IEEE PES general meeting in Tampa, Florida.
Electricity market demand is increasing by 1.5 - 2.0% per year. With demand rising and older power plants retiring, the need for power supply in the North Americas, in general, is becoming critical. This is especially true in the Northeast part of the US. While much discussions and regulatory filings have been done, an effective formation of the capacity market is still in the making. A review of...
Switched capacitors at wind farms employing fixed speed induction generators are intended to provide reactive power support to control and maintain the voltage at the point of common coupling (PCC) within acceptable operational values. Malfunction of the capacitor switching control may lead to voltage depression and, subsequently, to tripping of turbines which could create additional transient power...
The reliability requirements and the role of the supervisory authority in the electricity distribution business have grown strongly in the past few years. Electricity distribution companies are forced to consider new investment strategies to meet the challenges arising from the new operational environment. Aged electricity networks are subject to the more challenging weather conditions. To meet the...
In recent years, there have been focus on environmental pollution issue resulting from consumption of fuel, e.g., coal and oil. Thus, introduction of an alternative energy source such as solar energy is expected. However, insolation is not constant and output of photovoltaic (PV) system is influenced by weather conditions. In order to predict the power output for PV system as accurate as possible,...
The newly launched modern grid initiative (MGI) is one of the most important programs to arise in the past decade, because its goal is to unite and coordinate other efforts. Sponsored by the Department of Energy and managed by the National Energy Technology Laboratory, MGI does not duplicate or replace existing grid R&D. Rather, it seeks to establish a consensus vision for the future grid. And...
In this paper we demonstrated that wind generation tends to drive less transmission investment than conventional generation. Two transmission planning approaches are analyzed in this paper focusing on the security and economics as being key drivers for investing in transmission. We demonstrated that it will not be appropriate to treat wind power as conventional generation in security assessments,...
This paper outlines the adaptation of an existing distribution power flow experiment for use in outreach education. Using an iterative learning and design process with non-engineering students at the pre-college level and the pre- junior, college level, new laboratory materials were developed and a new set of laboratory activities were selected. Assessment surveys developed for both the design process...
A new state-space type stabilizer and its design algorithm to minimize low frequency oscillation is proposed. The proposed power system stabilizer (PSS) design algorithm not only damps the oscillations by moving the eigenvalues to desired left hand plane locations but additionally reduces the excitation of the mode itself through optimization of the left eigenvector of the poorly damped electro-mechanical...
Nowadays the number of distributed generators (DG) is growing rapidly. This change will greatly influence the power system dynamics. Stability studies of large-scale power systems are becoming more and more difficult due to complexity and large variety of DG units. For example, small signal stability studies might be not so straightforward as before. A lot of questions appear: how to linearize generators...
This paper presented an alternative technique to improve the security of electric power control systems by using anomaly detection to identify attacks and faults. By using rough sets classification algorithm, a set of rules can be defined. The alternative approach tries to reduce the number of input variables and the number of examples, offering a more compact set of examples in order to fix the rules...
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