Speed control of the turbine used to drive the compressor
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Industrial steam turbines are those used to drive compressors; speed control is generally achieved using the Woodward 505, as well as the TRICON TS3000. Now a question arises! 1. The adjustable speed is generally 75%-105% of the rated speed. Can it be understood that within this range of 75%-105% of the rated speed, the speed controller can control the hydraulic motor, which in turn adjusts the steam valve to control the rotation speed? 2. So, during low-speed warm-up when the speed is not within the adjustable range of 75%-105% of the rated speed, what controls the speed of the unit?
Regardless of the range, only the speed setting changes; the adjustment process remains the same.
Are you aware of BRAUN’s OVS system? How to implement overspeed protection control?
1. The form of speed control adopted is the one selected in the initial design; nowadays, new installations generally use ITCC for centralized control； 2. 70–105% of the rated speed generally refers to the adjustable speed, that is, the lower and upper limits at which the speed can be set ； 3. During warm-up, if it is a TRICON system, the speed of the warm-up process is usually set to 500 for the first stage and 1500 for the second stage. The time taken is also predetermined, but it can be adjusted manually; however, the minimum time must be maintained ； I’m not sure if what I said is what’s needed; it’s just my personal opinion!
The speed range refers to the range of turbine speeds at which it can operate with high efficiency; in fact, the turbine can operate at various speeds under load