| 摘要 |
<p>PURPOSE:To achieve continuously good operation in a power plant by varying the tracking width of a load limiter for a speed governor according to a main steam pressure. CONSTITUTION:A function generator 11 outputs an opening correction factor 1 when a main steam pressure is at a fixed value A, and outputs the opening correction factor which increases in inverse proportion as the main steam pressure descends. A multiplier 8d of an automatic tracking system 8 of a load limiter multiplies a set tracking depth Vs by the output of the function genertor 11 to transfer to an adder 8b. The adder 8b outputs a deviation signal between a set tracking width Vs and the output of the function generator 11 to a load limiter 6 via a controller 8c. With this construction, there is no dispensable load limiting action and good operation of the power plant can be achieved continously.</p> |
