By H Lee Willis; Randall R Schrieber; Gregory V Welch
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Additional info for Aging power delivery infrastructures
Most of these prioritization methods are entirely incapable of allocating a limited (constrained) budget among needed projects in the best possible manner [Willis, 1997, Chapter 18]. • Reliability engineering at many utilities is mostly reactive. Reliability analysts review operating records and experience in order to identify poor performing areas or equipment. Once identified, these areas are turned over to Engineering and Planning for rehabilitation, using what are basically traditional contingency-based tools.
It must "pick up" power at a few, large sites (generating plants), and deliver it to many, many more small sites (consumers). It must somehow achieve economy by using high voltage, but only when power flow can be arranged so that large quantities are moved simultaneously along a common path (line). Ultimately, power must be subdivided into "house-sized" amounts, reduced to utilization voltage, and routed to each business and home via equipment whose compatibility with individual consumer needs means it will be relatively inefficient compared to the system as a whole.
The T&D system moves the power from those often-distant generating plants to the many consumers who consume the power. 1 This and other distributed resources - so named because they are distributed throughout the system in close proximity to consumers - including storage systems and demand-side management, often provide great benefit. But regardless of the use of distributed generation or demand-side management, the T&D system is the ultimate distributed resource, consisting of thousands, perhaps millions, of units of equipment scattered throughout the service territory, interconnected and operating in concert to achieve uninterrupted delivery of power to the electric consumers.
Aging power delivery infrastructures by H Lee Willis; Randall R Schrieber; Gregory V Welch