A fast discrete method for voltage drop and current calculation for manufacturing facilities with intermittent loads

Prabhakara, F.S.

doi:10.1109/28.126738

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…The probability density function of the voltage fluctuation can be further expressed by the GramCharlier series expansion (Stuart and Ord, 1994). Compared with traditional methods (Prabhakara et al, 1991;Prabhakara, 1992a;Dopazo, 1975;Meliopoulos et al, 1984;1990), the computation complexity can be simplified and the computation time can be markedly reduced by the proposed method. A similar cumulant concept was used to solve problems of production cost and LOLP (loss of load probability) (Stremel et al, 1980;Wang and McDonald, 1994).…”

Section: Introductionmentioning

confidence: 96%

“…Intermittent loads involving high, pulsating and instantaneous power demands include grinders, hammer mills, rock crushers, reciprocating pumps and arc welders (Gonen, 1986;Prabhakara et al, 1991;Prabhakara, 1992a;1992b). These loads may be periodic, e.g., grinders, or non-periodic, e.g., crushers.…”

Section: Introductionmentioning

confidence: 98%

“…There were some methods developed for calculating the stochastic/probabilistic voltages (Prabhakara et al, 1991;Prabhakara 1992a;Dopazo et al, 1975;Meliopoulos et al, 1984;1990). Prabhakara et al (1991) use probabilities and a Z-matrix to calculate voltage drops and currents caused by intermittent loads in feeders.…”

Section: Introductionmentioning

confidence: 99%

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Calculation of voltage fluctuation caused by intermittent loads

Hong¹,

Wang²

2004

Journal of the Chinese Institute of Engineers

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Intermittent loads, such as grinders and welders, are the main factors that degrade the power quality in the distribution system. Intermittent loads will result in voltage fluctuations with stochastic characteristics, which may lead to malfunction of other sensitive loads. This paper uses cumulant method to calculate the bus voltage fluctuation using the algebraic addition and multiplication. The probability density function of the voltage fluctuation can be further expressed by the Gram-Charlier series expansion. Compared with traditional methods, computation complexity can be simplified and computation time can be markedly reduced by the proposed method. The simulation results from an 11-bus industrial distribution system with grinders show the applicability of the proposed method.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 98%

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Calculation of voltage fluctuation caused by intermittent loads

Hong¹,

Wang²

2004

Journal of the Chinese Institute of Engineers

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Application of Computer Methods to the Design of Distribution Facilities with Intermittent Loads

Prabhakara

1992

Electric Machines & Power Systems

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Evaluation of voltage drop in harbor electrical distribution systems with high voltage shore connection

Lee

Chou

et al. 2016

2016 IEEE Industry Applications Society Annual Meeting

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For a variety of reasons, it is becoming an increasingly common requirement for ships to shut down ship generators and connect to high voltage shore power for as long as practicable while in port. Ship electrical equipment shall only be connected to shore supplies that are able to maintain harbor distribution system voltage quality. Voltage drop, which is produced by the possible loading conditions of a ship when connected to a shore supply, may result in unsatisfactory operation of, and damage to, electrical and electronic equipment on board and thus, must be considered in the harbor distribution system design in order to comply with the requirements of international standards. A simple and fast method able to estimate the expected magnitude of voltage drops and provide information about the effectiveness of the various mitigation methods is essential. This paper presents the methodology and results for evaluation of the voltage drops of a practical harbor electrical distribution system with high voltage shore connection (HVSC). The potential voltage drops of the implemented HVSC are quantified using standard analytical formulas. Sensitivity analysis is performed to determine the critical parameters that significantly affect voltage drops. The parameters that have great improvement benefits should have high priority for implementation in other distribution systems with HVSC. The results obtained in this paper can provide engineers with useful information regarding the actual magnitude of voltage drops, as well as on the effectiveness of mitigation options for voltage drops, which would greatly enhance HV shore supply quality

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A fast discrete method for voltage drop and current calculation for manufacturing facilities with intermittent loads

Cited by 5 publications

References 6 publications

Calculation of voltage fluctuation caused by intermittent loads

Calculation of voltage fluctuation caused by intermittent loads

Application of Computer Methods to the Design of Distribution Facilities with Intermittent Loads

Evaluation of voltage drop in harbor electrical distribution systems with high voltage shore connection

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