| 摘要 |
PURPOSE:To keep vacuum degree at a constant value, by comparing the vacuum degree, which is set by a load for a steam turbine, with the vacuum degree in a condenser, adjusting the amount of working air of an air ejector based on the result, and controlling the output of a vacuum pump. CONSTITUTION:The vacuum degree, which is set by a load for a steam turbine, is inputted to a comparator 7 from a vacuum setting device 6. The vacuum degree in a condenser 1 is inputted to the comparator 7 from a vacuum degree detector 4. Based on the signal from the comparator 7, a control valve 3 is opened and closed, the amount of working air of an air ejector 8 is adjusted, and the output of a vacuum pump 2 is controlled. When the vacuum degree is lowered, the level is quickly returned to the original vacuum degree. When the vacuum degree tends to increase, this is suppressed. Even though the fluctuation in the load of a turbine generator is large, the vacuum degree in the condenser can be readily kept at the constant value. |
