Basler DECS-250 User Manual

9440300990 15-7
DECS-250 Power System Stabilizer
generator voltage exceeds the terminal voltage setpoint. The terminal voltage limiter is enabled and
disabled by software switch SSW 8. The limit setpoint is normally selected such that the limiter will
eliminate any contribution from the PSS before the timed overvoltage or volts per hertz protection
operates.
The limiter reduces the stabilizer’s upper limit, V
PSS_ULMT
, at a fixed rate until zero is reached or
overvoltage is no longer present. The limiter does not reduce the AVR reference below its normal level; it
will not interfere with system voltage control during disturbance conditions. The error signal (terminal
voltage minus the limit start point) is processed through a conventional low-pass filter to reduce the effect
of measurement noise. The low-pass filter is controlled by a time constant.
Figure 15-10. PSS Configuration Settings
Figure 15-11. PSS Control Settings

Basler DECS-250 Specifications

General

Brand	Basler
Model	DECS-250
Category	Control Systems
Language	English