A novel approach for assessing the impacts of voltage sag events on customer operations

Abstract

The business activities of the majority of industrial and commercial customers are dependent on some critical equipments that are susceptible to voltage sag events. This paper aims to propose a novel approach to estimate the financial impacts of voltage sag events on customer operations. The proposed technique is based on the event tree method. Using this approach, it is possible to consider the impacts of operational failure of various sensitive equipments, involved in the customer operations, on the financial losses expected from voltage sag events. A quantitative case study is conducted in the paper to illustrate the applicability of the proposed approach.Index Terms-Event tree, interruption cost, power quality, voltage sags.

Analysis and Adequacy Methodology for Voltage Violations in Distribution Power Grid

“…The problem related to voltage analysis in distribution systems is target of studies that seek mechanisms to keep voltage within established limits, aiming to minimize: (i) switching in voltage regulation equipment and reactive power control [20], (ii) integrated studies for voltage and reactive energy problems [21], (iii) interruption or loss of loads sensitive to voltage variation [22,23] among other problems. Studies are increasingly necessary to mitigate impacts caused by tension variation on consumers, avoiding equipment damage, production process interruption and regulatory remedies [24].…”

“…In most countries the electricity utilities service quality is assessed in the aspects of: (1) supply continuity, (2) customer service quality and (3) electrical power quality [24]. These three aspects correspond to: (a) electricity availability to the consumer and, if characterized by interruptions, duration and frequency parameters, (b) quality of service that covers commercial relationship and services provision between utilities provider and consumer and (c) electricity quality distributed within limits and indicators established in each country specific resolutions, avoiding: (i) harmonic distortion, (ii) low power factor and (iii) fluctuations, imbalance and high voltage variations [25,26].…”

Probabilistic Assessment of Financial Losses in Distribution Network Due to Fault-Induced Process Interruptions Considering Process Immunity Time

“…As reported in [7], this curve shows which combinations of sag magnitude and sag duration, as two most prominent sag characteristics, can affect the normal functioning of equipment. In order to account for a wide variety of equipment and their different sensitivity to sags, an uncertainty region or "voltage tolerance band" has been used [4], [8], [9] when defining equipment tolerance to sags. Furthermore, end-use customers use different groups of electric-electronic equipment in their processes and a single voltage tolerance curve is not representative enough of process sensitivity/failure-which ultimately causes financial loss.…”