A method for estimating the frequency and cost of voltage sags

Author

Heine, Pirjo ; Pohjanheimo, Pasi ; Lehtonen, Matti ; Lakervi, Erkki

Author_Institution

Power Syst. Lab., Helsinki Univ. of Technol., Espoo, Finland

Volume

17

Issue

2

fYear

2002

fDate

5/1/2002 12:00:00 AM

Firstpage

290

Lastpage

296

Abstract

The annual number and cost of voltage sags were determined for five Finnish distribution companies. The method of fault positions was applied for the calculation of voltage sag frequency. The economic consequences were assessed by multiplying the sag frequency and cost by the number of customers. The cost of a single sag was taken from a survey that had been carried out in three Nordic countries in the mid 1990s. This paper proposes a method for retrieving sag-related information from statistics originally prepared for other purposes. In addition, this paper provides an estimate of the total annual sag-related cost for each of the companies considered in this study and for each customer category. The total cost per company appeared to be much higher than had generally been assumed

Keywords

costing; electricity supply industry; power distribution economics; power supply quality; 20 kV; Finnish distribution companies; Nordic countries; annual sag-related cost; customer category; economic consequences; fault positions; power quality; power system modeling; voltage sags costs estimation; voltage sags frequency estimation; Costs; Frequency estimation; Impedance; Information retrieval; Lakes; Medium voltage; Power generation economics; Power quality; Statistics; Voltage fluctuations;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/TPWRS.2002.1007895

Filename

1007895