| 摘要 |
PURPOSE:To efficiently and effectively utilize SVC (reactive power compensating) equipment by detecting an intermediate band of each control signal, determining a limiter range symmetically about the positive and negative of the intermediate band and adding both the positive and negative ranges to obtain 100% control value. CONSTITUTION:Control signal limitter circuits 23', 36' for passing the intermediate band of a signal as a control signal and cutting out the other part are respectively connected to a voltage variation detector 21 and a Q (reactive power) change output side, the output sides of the circuits 23', 37' are respectively connected to signal converters (FV) 24, (FQ) 37 and the output sides of the circuits 24, 37 are connected to an adder 40. The adder 40 is connected to a pulse generating part 41, which is connected to an SVC thyristor 12. The signal converters (FV) 24, (FQ) 37 are circuits for converting signals with intermediate bands respectively passed from the limiter circuits 23', 36' into signals from zero and a bias 35 is set up to the intermediate of a control signal. Since the intermediate band of a detecting signal is used as a control signal, SVC operation capacity can be effectively utilized. |
