[논문]Evaluation of Interruption Costs for Commercial Customers

Choi Sang-Bong; Nam Kee-Young; Kim Dae-Kyeong; Jeong Seong-Hwan; Lee Jae-Duck; Rhoo Hee-Suk

Evaluation of Interruption Costs for Commercial Customers 원문보기

Choi Sang-Bong (Underground Power System Group, Power System Division, KERI) , Nam Kee-Young (Underground Power System Group, Power System Division, KERI) , Kim Dae-Kyeong (Underground Power System Group, Power System Division, KERI) , Jeong Seong-Hwan (Underground Power System Group, Power System Division, KERI) , Lee Jae-Duck (Underground Power System Group, Power System Division, KERI) , Rhoo Hee-Suk (Underground Power System Group, Power System Division, KERI)

This paper presents an evaluation of the interruption costs for commercial customers in Korea using customer survey methodology. When various research results are examined, the evaluation of direct interruption costs becomes much more simplified. Especially, in the case of commercial customers, it is known that the evaluation of direct interruption costs is more useful. Accordingly, this paper selected the customer survey method to evaluate the interruption costs for commercial customers in Korea considering interruption and customer characteristics.

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문제 정의

Therefore, this paper examined the direct and short term interruption costs borne by commercial customers through a survey. The questionnaire included interruption characteristics, such as interruption duration, day, time, and month of interruption, whether an advance warning was given or not, as well as customer characteristics, such as business size and type.
This survey also examined the importance of various electric facilities and the available power supply time of emergency power supply devices. Table 2 presents the results of the question concerning the significance of electric facilities for commercial customers.

제안 방법

Compared to direct results that have short term effect, indirect results have long term effect and therefore their evaluation is more complicated. Furthermore, the evaluation of such results depends largely on customer characteristics such as customer type, operation size, and amount of power used, as well as on power characteristics, such as interruption duration, interruption frequency and time period. Moreover, it is very complicated to calculate the interruption costs according to the reliability level the customer experienced and the one he/she expects, and the interruption costs following changes in interruption extent, i.
One of the most important tasks in the design of the questionnaire was to make an annual list of interruption cost changes by month, a weekly list of interruption cost changes by day and a daily list of interruption cost changes by time.
The power company randomly selected samples in consideration of the regional distribution of samples, visited them, and carried out the survey.
Therefore, this paper examined the direct and short term interruption costs borne by commercial customers through a survey. The questionnaire included interruption characteristics, such as interruption duration, day, time, and month of interruption, whether an advance warning was given or not, as well as customer characteristics, such as business size and type.
The questions used for both of the commercial customers are as follows. The questions included power use amount by area and customer type, emergency power supply device and available supply time, worst interruption month, day, and time, interruption cost change by day and month, rate of interruption cost reduction by interruption warning time, and the size and number of workers by area and customer type.
The respondents were asked to classify the loss into production loss, sales loss, extra labor cost, production restart cost, damage of perishable goods, and other loss. If it was difficult to divide, then the sum was requested.
The survey procedure included selection of samples by area, site visit and survey implementation, collection of power use data, and data analysis.

대상 데이터

800 customers were selected in consideration of regional distribution.

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Evaluation of Interruption Costs for Commercial Customers 원문보기

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