| 摘要 |
An arrangement which provides for automatically shedding the separable loads of a power distribution area in accordance with predetermined priorities established, not on a basis of system frequency or rate of system frequency change as is present day conventional practice, but on a basis of actual area capability as compared to area load. The total prevailing capability of the power sources of the area is compared with the prevailing area load to produce a signal indicative of the prevailing area reserve power. That signal is compared with the preferred reserve and the difference is then the excess or deficiency with regard to the preferred reserve, defined as the prevailing area margin. That margin in turn is compared with the margin settings for each separable load so that when the margin decreases to a value equal to or below the margin setting for each separable load, that load is automatically sequentially disconnected.
|
