| 摘要 |
PURPOSE:To automatically and continuously display the incremental permanent speed variation of a generator. CONSTITUTION:A differentiator 3 that calculates the variation of the output signal 2 of a generator from a detector 1 which detects the output of the generator in a short time and a zero division preventing circuit 8 having a function that can give a limit to the magnitude of a signal from the differentiator 3 are provided. In addition, another differentiator 11 that calculates the variation of a frequency signal 10 from a detector which detects the frequency of the electric power generated by the generator in a very short time, proportionator 12 which multiplies a signal from the differentiator 11 by a coefficient, divider 13 which finds the incremental permanent speed variation of the generator by performing division on signals from the proportionator 12 and circuit 8, and incremental permanent speed variation display 14 which displays the incremental permanent speed variation calculated by the divider 13 are also provided. |
