214
CONTENTS
Introduction…………………………………………………..
3
1.
The main electrical equipment of hydropower plants.
Synchronous generators………………………………………
5
1.1.
The history of the development of the electric power industry of
Uzbekistan. The rated voltage of the
elements of the electrical
system and the operating modes of the neutrals……..
5
1.2.
Synchronous generators. Nominal parameters of generators. The
design of hydrogenerators…………………………………
9
1.3.
Generator cooling systems……………………………………...
12
1.4.
Generator excitation systems…………………………………...
19
1.5.
Automatic regulation of generator excitation (ARE)…………..
24
1.6.
Field blanking of synchronous generators……………………..
27
2.
2.1.
Power transformers…………………………………………...
Types of power transformers and their nominal parameters
……
33
33
2.2.
Power transformer cooling systems…………………………….
41
2.3.
The load capacity of transformers……………………………...
45
2.4.
Design and operation modes of autotransformers……………...
48
2.5.
Transformer voltage regulation…………………………………
55
3.
Electrical apparatuses up to 1000 V………………………….
60
3.1.
Switch circuit breaker. Contactors and magnetic starters……....
60
3.2.
Automatic air circuit breakers. Circuit breakers………………..
65
4.
Electrical apparatuses with voltages greater than 1000 V…
72
4.1.
High voltage circuit breakers. Oil tank switches. Low oil circuit
breakers…………………………………………………………
72
4.2.
Air circuit breakers. Electromagnetic
and vacuum circuit
breakers. Elegant and synchronous switches…………………..
78
4.3.
High Voltage Disconnectors.
Design and principle of
215
operation………………………………………………………..
84
4.3.1
Disconnectors for indoor installation…………………………..
86
4.3.2
Disconnectors for outdoor installation………………………….
88
4.4.
Current and voltage transformers in hydropower equipment…..
90
4.5.
Selection of currentled parts of basic
electrical equipment in
hydropower equipment…………………………………………
96
4.6.
Electric circuit connection hydropower equipment…………….
102
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