| 摘要 |
<p>PURPOSE:To introduce a microprocessor and to still accurately control the excitation by providing execution managing means for discriminating the execution of necessary control means in response to the operating state of a synchronous machine. CONSTITUTION:An excitation controller 5 calculates an effective current Ip, a reactive current Iq, a terminal voltage e1 according to digital data V, I input from an A/D converter 4 in step 301. Then, insufficient exciting (UEL) means is started and discriminated in step 3021, overexcitation limiting (OEL) means is started and judged in step 3022, V/F limiting means is started and judged in step 3023, whether a voltage deviation DELTAV falls within control deviation (alpha) or not is judged in step 3024, the process is executed in response to the judged results, and process is executed by an automatic voltage means (AVR)300.</p> |
