129740-002  DSP 信号处理模块

以下频率控制模式描述基于29740-002程序的默认设置。有关如何更改29740-002的默认值的信息断路器逻辑，发电机启动时，速度PID在频率控制模式下运行断路器闭合，公用设施连接断路器断开。在频率控制方面模式下，无论负载如何，装置都将以相同的速度或频率运行它正在供应（达到机组的负载能力）。当断路器位置导致速度PID切换到频率控制时，速度设定点立即步进到最后一个涡轮机速度（频率）在选择频率控制之前感应到。这允许无碰撞传输在不同模式之间。

The following Frequency Control mode descriptions are based on the 505program’s default settings. For information on how to change the 29740-002s defaulted breaker logic, refer to Volume 2 of this manual.

The Speed PID operates in the Frequency control mode when the generator breaker is closed and the utility tie breaker is open. In the Frequency control mode, the unit will operate at the same speed or frequency regardless of the load it is supplying (up to the 29740-002 load capability).

When breaker positions result in the Speed PID switching to Frequency control,speed set point is instantly stepped to the last turbine speed (frequency)sensed before Frequency control was selected. This allows a bumpless transfer between modes. If the last speed sensed was not at the ‘Rated Speed Set Point’(synchronous speed) setting, the speed set point will ramp to the ‘Rated Speed