The evaluation on costs of power disturbance events to end-users

In recent years, power end-users are more and more demanding on the power distribution reliability and power quality, as even some small disturbances in power supply could lead to production process interruptions, which cause enormous costs to power users. Based on a one-year-long survey comprised of 37 face-to-face interviews in a coastal and industrial city in China, this paper presents the evaluation results of costs of power disturbances to different industrial categories. The annual costs of voltage dips, short-duration interruptions and outages for per end-user are investigated. With the data from the survey samples, it is shown that there is statistically significant correlation between the costs of power disturbances and the annual output value of end-users, which makes the evaluation of the whole costs in China possible.