Journal
IEEE TRANSACTIONS ON POWER DELIVERY
Volume 30, Issue 3, Pages 1478-1486Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRD.2014.2364558
Keywords
Financial losses; power quality (PQ); process immunity time; reliability; voltage sags
Categories
Funding
- Sao Paulo Research Foundation (FAPESP) [2012/18134-0]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [12/18134-0] Funding Source: FAPESP
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This paper introduces a stochastic methodology to assess annual performance of distribution network and individual customers with respect to voltage sags, long duration interruptions, equipment trips, and process trips. These values are then used to evaluate financial losses in the entire distribution network. For each of the large number of simulated faults throughout the network, a probability of sag and long duration interruption occurrences is evaluated at each network bus. The methodology then includes for the first time the concept of process immunity time in order to assess as accurately as possible the resulting financial loss due to process interruption. To increase the accuracy of the assessment of financial loss, the methodology also considers the possibility of equipment and process restart, reliability, and type of fault. The methodology is illustrated on a real distribution network and it shows that inclusion of PIT in financial loss assessment results in a reduction of about 25% in estimated financial loss.
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