By Willis, H. Lee; Schrieber, Randall R
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As a result individual equipment failures cause noticeable customer power interruptions, and events involving multiple failures (such as during storms or bizarre events) tend to cascade to large numbers of customers out of service. Considerable improvement in a distribution systems SAIDI and SAIFI, even in the presence of a slowly rising tide of equipment breakdowns and failures, can be made by using a combination of smart equipment and changes in the circuit layouts and operating configuration.
Hidden” Capability May Thus Be An Untapped Resource As a result, distribution systems in most utilities are underutilized in two ways: 1. Economics – when viewed just from their standpoint of their traditional function moving and dispersing power – they cost more than is necessary. 28 Chapter 1 2. Reliability – the potential of the primary system to maximally contribute to improved reliability is partially untapped in the vast majority of cases. 3 gives statistics on the results of “distribution optimization” studies from nine utilities, with which the authors have recently worked.
In fact, the power distribution system is by far the most difficult of all layers in the power system to plan and engineer to a truly high standard. It is rocket science, because distribution systems are like piranha. Yes, all the equipment is low voltage, all of it is small, and each unit is some type of very common, “commodity” design. But a distribution system consists of tens or hundreds or thousands of thousands of these components. In aggregate it is large, expensive, and most importantly, very complicated.
Aging power delivery infrastructures by Willis, H. Lee; Schrieber, Randall R