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 129740-002  DSP 信號處理模塊

以下頻率控制模式描述基于29740-002程序的默認設(shè)置。有關(guān)如何更改29740-002的默認值的信息斷路器邏輯，發(fā)電機啟動時，速度PID在頻率控制模式下運行斷路器閉合，公用設(shè)施連接斷路器斷開。在頻率控制方面模式下，無論負載如何，裝置都將以相同的速度或頻率運行它正在供應(yīng)（達到機組的負載能力）。當斷路器位置導致速度PID切換到頻率控制時，速度設(shè)定點立即步進到最后一個渦輪機速度（頻率）在選擇頻率控制之前感應(yīng)到。這允許無碰撞傳輸在不同模式之間。

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