Adjustment process caused by changes in turbine speed

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The adjustment process caused by changes in turbine speed: During normal operation, the rotational speed of the turbine changes, indicating that there is a mismatch in power between the turbine and the compressor. At this time, the 505E electric speed regulator will react and adjust the rotational speed. First, the 505E electric speed controller compares the actual speed with the speed reference. After obtaining the deviation, it performs PID calculation on the deviation. Finally, it sends a changed 4-20mA standard signal to the high and low voltage electro-hydraulic converters respectively, thereby changing the oil pressure signals of the high and low pressure secondary oil. ； Then, through changes in the secondary oil pressure, the high and low pressure regulating valves are opened or closed to change the amount of steam entering the turbine and the distribution of steam inside the turbine, so that the turbine power matches the compressor again and the turbine speed returns to the set value. The adjustment caused by the change of turbine speed makes the adjustment direction of the high and low pressure valves in the same direction. The speed decreases and the high and low pressure valves are opened simultaneously. ； The speed increases and the high and low pressure valves are closed at the same time.