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In a hydro-dominated power system, with complex inter-temporal linkages, capacities of individual projects and project configurations are more complicated than using the simple megawattage, often used to denote capacity in thermally dominated systems. In this paper, the long term hydro scheduling problem is solved and used to test novel definitions of hydro-capacities, based on expected cost and cost...
This digest reviews extensively on preliminary analysis to obtain a 30 kW electric power generator and to apply Bio-methane to use it directly to micro gas turbine for electricity generation.
Many methods have been introduced as economic load dispatchers. However, all these methods depend on the optimization field, where most of these studies mainly focus on how to strengthen the optimization algorithms themselves. This means the mystery key that segregate between the good and bad ELD solvers is the optimization algorithm itself. However, there is a practical fact known in many real power...
During transients, the instability of the power system can attribute to the angle instability as well as the voltage instability. The angle and voltage stability are entangled with each other under such circumstances. The angle stability has been well-studied, and many online stability assessment approaches have been put forward to this end. Yet the problem to determine the voltage stability of power...
In this paper, the mechanism of low frequency oscillation of power system is studied from the perspective of the damping coefficient of the generator. Based on the analytical expression of damping coefficient, the factors which affect the damping coefficient are divided into four parts, damping of motor, electric generator and connecting line reactance, electric generator head load, and the transmission...
This paper gives a new approach for optimizing the total power output of a hydroelectric power station by analyzing the characteristics of efficiency function. It proofs the maximum total power supply. Under the constant head of the river, keeping each generator the same flow rate is the efficiency optimization, and the switch points are at the same efficiency points of different operating methods.
Japanese power systems are expected to increase the installation of photovoltaic (PV) generation in the future. We have developed operation and control methods for future power systems based on PV generation forecasting. In our previous study, we proposed a supply-demand operation method based on the intraday few-hours-ahead forecasts of the PV power output and concluded that the unit commitment (UC)...
Economic studies in power systems have gained more importance post deregulation. The number of generators participating in the power market have significantly increased over the past years. Smart grids are now enabling distributed generation resources to also participate in the power market. Many economic studies conducted on power system networks utilize legacy quadratic cost curves which are based...
Maintaining grid frequency close to the nominal value is one of the fundamental objectives of electric power operations. In this paper, we develop a decentralized control algorithm to improve the frequency response in case of sudden loss of generation in an interconnected grid. We propose a Cyber-Physical Architecture that requires minimal information exchange between control areas to reduce the frequency...
This paper presents the baseline concept for a multi-year system development of a pico-hydroelectric power system in Nepal. Prior work on pico-hydro systems has focused on one or a few of the factors required for value sustainment over the full life cycle of the system. In contrast to prior investigations, this work provides a systems engineering approach to generate a highly contextualized solution...
This paper presents a methodology for prioritizing bus locations of a power system for PMU placement. This is based on the identification of strategically important locations of power systems using eigenvalue analysis of the measurements of the system variables. The eigenvalue analysis was implemented using Principal Component Analysis (PCA) and the methodology was tested on the IEEE 118-bus system...
The cutting edge power system has turned out to be extremely intricate in nature with utilization of the electric power which is in movement and these inclination increments with the industrialization and the development of the populace. Also one loss of supply because of any specialized issue can bring about the interference of the different generation forms, and before shoppers who turn out to be...
The problems of using of mechatronic devices as a part of a ship unified high voltage electric power system (EPS) is considered. EPS contains a turbo generator source of high frequency electric power (200 Hz), an electric propulsion system (PS) and a system of power takeoff (SPT). The system of power takeoff is used for the supply of common ship consumers with the common mains frequency (50 Hz). Specified...
On the basis of analyzing of ship high voltage power system, established the ship diesel engine, ship high-voltage synchronous generator, excitation controller and load mathematical model, etc. The Matlab/simulink software was used to establish mathematical model and simulation, under sudden reduce and heavy load conditions, obtained the data of ship high voltage power system, including the synchronous...
With the increasing penetration of intermittent renewable energy sources into the electric power grid, there is an emerging need to develop stochastic optimization methods to enable the reliable and efficient operation of power systems having a large fraction of their power supplied form uncertain resources. In this paper, we formulate the stochastic AC optimal power flow (OPF) problem as a two-stage...
The machine dynamics response to any impact in the system is oscillatory. In past, the size of power system is smaller; therefor the period of oscillation was not much greater than one second. Today large capacity of generator and system interconnected with the greater system inertias and relatively weaker ties results in longer period of oscillation followed by perturbation. These are the situations...
In this paper, we consider a distributed load control problem for achieving supply-demand balance and frequency regulation in a power system. While most of the distributed load control schemes require the loads to exchange information through two-way communications, recent results have shown that it is possible to achieve fully distributed control by frequency-based imbalance estimation. However,...
Modelling and simulation of emerging DC shipboard power system (SPS) is required to validate the hardware design, converter control and protection algorithms. As DC SPSs may be large and complicated, the simulation of such systems using high fidelity models generally consumes much time and the validation of performance using multiple test scenarios becomes impractical. An alternative method is to...
This paper introduces a novel method of designing Wide Area Control (WAC) based on a discrete Linear Quadratic Regulator (LQR) and Kalman filtering based state-estimation that can be applied for real-time damping of inter-area oscillations of wind integrated power grid. The main advantages of the proposed method are that the architecture provides a) online coherency grouping that properly characterizes...
Power demand of isolated communities or islands primarily relies on heavy oil based diesel generator systems where these fossil fuel based power generators are not only costly but also create adverse effect on the environment. Photovoltaic generator system (PV system), wind energy conversion system (WECS) and battery energy storage system (BESS) are clean sources of alternative energy. These energy...
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