The calculation results other than the table written in the experiment method
in the print of the practice are recorded.
It is safe when writing because it might possibly be necessary.
Experiment‡T result
Set moment of force
Descent of voltage of railway track
Railway track loss rate
Power transmission edge impedance
Railway track resistance
Reactance
Action impedance
Action resistance
Action reactance
1.0
1.01
11.0
58.82
56.47
16.46
0.588
0.565
0.165
4.71
7.79
38.46
37.69
7.66
0.385
0.377
0.077
5.29
9.24
27.64
26.81
6.72
0.276
0.268
0.067
0.8
2.04
9.66
58.82
56.89
14.94
0.588
0.569
0.149
4.17
9.43
38.46
37.69
7.66
0.385
0.377
0.77
0
10.7
25.64
21.28
14.30
0.256
0.213
0.143
0.6
2.04
6.43
60.61
58.79
14.74
0.606
0.588
0.147
-3.38
8.02
33.33
21.00
25.88
0.333
0.210
0.259
-4.31
13.72
24.39
16.34
18.04
0.244
0.163
0.180
The effect of Feranti is put.
The phenomenon of the receipt edge voltage's rising more than the power
transmission edge voltage is called the effect of Feranti.
The voltage falls on the electric wire for resistance when passing an electric
current because there is resistance though it is very small usually.
Therefore, it is general that the voltage of the power transmission edge is
higher than that of the receipt edge.
However, head Wataru of the cable like a long distance power line might become and the receipt edge voltage become higher than the power transmission edge voltage in a long system.
In the above figure, the current is late.
In the above figure, the current is advanced.
As for the change of the phase of the current, it is deeply related to inductance and the capacitor, and there is a lot of inductance, the vector of V1 in the power transmission edge voltage understands than figure when the current is late, and understands the power transmission edge voltage is higher than the receipt edge voltage for a long time than the vector of V2 in the receipt edge voltage.
There are a lot of electric capacity when the current is advanced.
The vector of V2 in the receipt edge voltage understands than figure and it is understood that the receipt edge voltage is higher than the power transmission edge voltage for a long time than the vector of V1 in the power transmission edge voltage.
It explains another, the short-circuit accident, and Cara accidents in the
matrix.
The short-circuit is that The breaker's damaging by a fire of the transformation of electrical energy room cover of the distribution line is deteriorated, it damages transformer and other power equipment and exploding, especially many flow, and the contact of the electric wire by the wind, and a large current that exceeds ratings flows to the cable run as a result. (Here, put it also in figure of the electric wire. )
The shake is prevented by setting up Baransa at the center of the electric wire if it is
assumed the method of preventing the shake by the wind.
Cara accidents in the matrix are for the insulation of the cable run and the earth to decrease extremely, and to connect between those with the arc or the conductor. (Here, figure of the electric wire such as person's hanging in the electric
wire is put. )
There is a method of giving of the earth to the outside box of the equipment, and the installation such as the earth leakage breakers on low piezo-electric road, etc. if it is assumed the prevention plan. (¥¥¥it is slight though must be that. )
It is necessary to note it enough because both short-circuit accidents and Cara
accidents in the matrix are very dangerous.
About the ground wire
Me of ground wire ..it is ..main....
1.Overhead wiring and the thunder are received to the upper part of the electric
wire by the ground wire and the direct hit to the electric wire is prevented.
2.The rise of the potential of the iron tower by the thunder, and the
reverse-Frasshiorbaing to the electric wire from the iron tower side
are prevented.
3.The electromagnetic induction trouble to the weak electric current line is
reduced by the ground wire.
Moreover, it is being researched by the ground wire to achieve it now recently though the communication is enabled in using the optical fiber cable though it is not possible to communicate because of the gain (amount of attenuation) when extending to the long distance. (Put it also in figure of the ground wire. )
Please teach ahead of time in mail if you do not understand from something problem
research.
