Results 251 to 260 of about 141,174 (294)

On load shedding in microgrids

18th Electric Power Distribution Conference, 2013
Similar to conventional systems, having acceptable voltage and frequency is necessary in a MG. MGs have variable nature due to the existence of the generators like PVs. Because of this, the control issue in MGs is important. The stable performance in MGs is realized by grid in grid-connected mode.
N. Hajimohamadi, H. Bevrani
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Optimization of load shedding system

IEEE Transactions on Energy Conversion, 1993
An optimization algorithm is presented for an underfrequency load shedding system which is composed of several stages that are tripped at preset frequencies. The optimization of this system is considered with respect to a cost function that includes a dynamic part, which is the integral of the deviation from nominal frequency, and a static part which ...
Y. Halevi, D. Kottick
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Developments in fast load shedding

Conference Record of 2014 Annual Pulp and Paper Industry Technical Conference, 2014
This paper describes a smart load shedding scheme that monitors plant loads, plant generation and generation/utility supply reserve to select the minimum number and lowest priority loads for shedding. The paper first gives an overview of industrial power system dynamics undergoing loss of supply contingencies and existing load shed practices, such as ...
Craig Wester, Terrence Smith, Jacobus Theron, David McGinn   +3 more
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DC Microgrid Load Shedding Schemes

2019 IEEE/IAS 55th Industrial and Commercial Power Systems Technical Conference (I&CPS), 2019
This paper investigates and compares the performances of three different load shedding schemes in a direct current (DC) microgrid. Comprehensive time-domain simulation studies are conducted on a realistic DC microgrid study system using the PSCAD/EMTDC software.
Jafar Mohammadi, Firouz Badrkhani Ajaei
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System loadability and load shedding

Electric Power Systems Research, 1994
Abstract System loadability is evaluated using a nonlinear programming technique, and a loadability margin is determined for purposes of static voltage stability assessment. The margin is either in terms of voltampere load or VAR load. Generation participation is adjusted in order to produce higher system loadability.
G.J. Berg, T.A. Sharaf
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Locational Load Shedding Marginal Pricing

2015 23rd Iranian Conference on Electrical Engineering, 2015
This paper presents the Locational Load Shedding Marginal Pricing (LSMP), a useful index for market-based real time intelligent load shedding problems. This parameter is well-described by introducing the load shedding program as an optimization problem very similar to, but in inverse vision, to Economic Dispatch (ED) problem.
A.G. Tikdari, H. Bevrani, M. Rashidi-Nejad, M. Montazeri   +3 more
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An emergency load shedding algorithm

2015 5th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT), 2015
A new emergency load shedding algorithm is pro posed in this paper based on the state plane representation of generator speed and power angle. When the trajectory of the power system stays in concave regions, the system is stable. When the trajectory crosses though the convex regions, the system is detected as unstable state.
Huaiyuan Wang, Baohui Zhang, Dezhi Chen
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Industrial plant load shedding

2011
To assist in restoring the equilibrium, frequency relays are employed. These disconnect the less important loads in stages when the frequency drops to a level that indicates that a loss of generation or an overload has occurred. This type of scheme is very useful in industrial plants where in-house generation is synchronised to the public grid system ...
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On underfrequency load shedding schemes

Proceedings of the Twenty-Second Annual North American Power Symposium, 2002
The author discusses some of the factors which must be considered for testing an underfrequency load shedding scheme. Fault simulation and system separation due to faults or out-of-step conditions must be represented. This is necessary for analysis of generator behavior within the system during the abnormal conditions.
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Multicriterial adaptive load shedding algorithm

PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376), 2003
This paper presents a conception of a multicriterial adaptive load shedding algorithm that is assigned to thermal power units when the island work conditions connected with the dynamic growing energy shortfall occurs. The main purpose of the multicriterial adaptive load shedding algorithm is determination of the real unbalance of the electric power ...
G. Sodzawiczny, P. Sowa
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