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5 juli 1930
elektrote
k n i k
127
the greater demand for power is, and probably
always will be, in central Sweden. The situation and
size of the most important power plants appears
from the map shown in fig. 1, the total power
resources and the percentage already exploited in various
part of the country from fig. 2. The total number of
power stations averages 2 000.
On account of the rapidly increasing requirements
of power, the possibility of a certain shortage of
power in the southern districts within the next few
decades is apparent. Already there is cooperation,
not only between the different State stations and
certain private stations separately, but also between
the State and certain private plants regarding the
utilization of existing water-reserves. In southern
Sweden the large lake Vänern is of particular
importance in this respect.
Fig. 1. Map, showing hydroelectric plants over 10000 hp. The most
prominent plants are: 1 = Trollhättan, 2 = Porjus, 3 = Älvkarleby,
4 — Untra, 5 = Lilla Edet, 6 = Lanforsen, 7 — Bullerlorsen, 8 —
Hammarforsen, 9 — Gullspång, 10 = Norrforsen. The many plants of the
South Swedish Power Co do not in general reach 10 000 hp, but form
together a considerable power block of c:a 75 000 hp. The diameter of
the circles is proportional to the output of the plants.
t *
* -
Fig. 2. Map, showing power resources in the three main districts of
the country. The outer, circles indicate the power available after
regulation of the rivers. The black sectors indicate the effect of
existing plants.
The steadily rising power consumption has raised
the question of power-transmission from northern
Sweden (Norrland) to the south. Projects of this
kind are under preparation, and before long at least
part of the biggest power resources of central
Norrland will probably be utilized for this purpose.
As to the origin of the power generated, State’s
plants deliver about a third of the total, while the
rest is partly municipal, but preponderatingly
private. Of the kWh produced by the State power
stations, about half come from Trollhättan. The
reason why the communal and municipal works have
so small a share in the primary production is that
most municipal electricity works buy their power
from other plants — in central Sweden chiefly from
those of the State, in southern Sweden from those
of the Sydsvenska Kraftaktiebolaget — and then
transform it for distribution in their own areas.
About half of the consumption falls on the general
industry, a quarter on the electrolytical and
electrothermal industries, while the remainder is divided
among households, lighting, trams, railways, and
electric steam boilers. About 1/3 of the industrial
consumption is used by the mining and metal industries,
Va by paper and wood, and the rest by other
industries. The degree of electrification, i e. the
relation between electric driving power and total
driving power used, is very high in certain industries.
In the mining and metal industries it is thus nearly
90 per cent, and in the majority of other more im-
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