Environmental Engineering Reference
In-Depth Information
Chapter 4
Electrical Equipment
4.1 General
This chapter on electrical equipment deals with the power devices used in wind
turbine systems, apart from the generators. Conventional devices are only men-
tioned, while the techniques most important for modern systems is power electronics
and converters. Also of exceptional interest for the grid integration of wind energy
systems is the topic of energy storage.
A selection of topic literature on power electronic devices is in [Moh95; Heu96];
the IEC provides a series of international standards in [IEC60146]. A survey on
current and future storage systems can be found in the Wikipedia [enwi].
4.2 Conventional Electrical Equipment
Different conventional electrical equipment is utilized in wind energy systems for
switching on and off, for setting active load and reactive compensation. Here are
only noted:
•
Transformers and inductors,
•
Rheostats and load resistors,
•
Passive compensation equipment (capacitors),
•
Passive filters.
4.3 Power Electronic Converters
4.3.1 General
In several system concepts the generated active power must be adapted in voltage
and frequency to the output or consumer side. This is especially the case in variable
speed systems. The devices serving for this purpose are power electronic inverters.
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