High voltage generator excitation group overvoltage protection circuit
Source: InternetPublisher:公子李 Keywords: Protection circuit excitation generator high voltage Updated: 2020/04/25
The DC voltage of the generator excitation winding
is provided by a three-phase thyristor after rectification. In the case of incorrect synchronization, out-of-synchronization, system failure, etc. ,
overvoltage
will be caused on the DC side that is harmful to the insulation of the rectifier components and excitation windings. To this end, the overvoltage must be limited, and the protection
shown in Figure 13-90 is usually used. circuit . In the figure, BQ is the excitation winding.
The varistor R serves as a backup overvoltage protection component.
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