IEEE Power & Energy Magazine - July/August 2020 - 83

the contract for all 10 hydraulic turbines
of 5,000 hp each. However, "none of
the proposals for distribution of power
was ... adequate to the requirements
at Niagara." Most proposals offered an
electrical transmission component: four
of them proposed dc, and four proposed
single-phase ac. None proposed polyphase ac, although George Forbes (Proposal 13) would later be a champion of
two-phase power. (See the "History"
article, "The Niagara Alternators: Competing Alternatives and Frequencies,"
IEEE Power Energy Mag., vol. 16, no.
5, pp. 96-104, Sept.-Oct. 2018).
A closer look at Proposal 1 will give
some insight into the power technology
of the late 1880s.

Proposal 1
The following information is taken from
Adams' Niagara Power, volume 1. Although drawings are mentioned, it appears that they are no longer extant. We
must rely on the written descriptions,
and because of this, there are some
problems with understanding the layout
of the equipment. It should also be noted
that because these were all deep wheel
pit plants, serious civil engineering
challenges were presented in addition
to electrical ones. This proposal was in
two parts. Project A was submitted first,
with Project B submitted after it was
realized that the tremendous amount of
excavation required by Project A would
make it a nonstarter.

posal implemented in the final design of
Adams' Plant Number 1.
Project A: Underground generators
with total output = 13,750 hp
✔ turbines

* quantity: 50, plus five held in
reserve
* type: impulse (Girard), horizontal axis

* output: 2,500 hp @ 180 r/min
driving two generators
✔ generators: two on each turbine
shaft
* quantity: 100, plus 10 held in
reserve
* rating: 1,250 hp @ 180 r/min
* 60 generators, plus six in reserve, rated 500 Vdc for local
distribution

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In the information below, the generator
and transmission line voltage are shown
as the same value, a nominal voltage of
500 and 1600 Volts, and all dynamos
are referred to as generators. In Project A, both the generators and turbines
were located underground at the bottom
of the wheel pit. It is not clear from the
written description, but it appears that
the turbines were to be in chambers
and the generators in galleries off these
chambers. In Project B, the generators
on the upper level were connected to the
turbines by a long shaft. This arrangement was the only aspect of this projuly/august 2020

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IEEE Power & Energy Magazine - July/August 2020

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Contents
IEEE Power & Energy Magazine - July/August 2020 - Cover1
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