Emergency frequency load shedding scheme
A load shedding system and method for controlling imbalances in a power system includes a signal generator adapted to generate a signal representative of a local system, and a modifying circuit adapted to adjust set frequencies. The system also includes a processing circuit adapted to process data received from the signal generator and modifying circuit and set load shedding priorities for the local system based on the processed data.
1. A load shedding system, comprising:
(a) a signal generator adapted to generate a signal equal to a local system frequency;
(b) a modifying circuit adapted to adjust a predetermined frequency based on a rate of change of the local system frequency and thereby generate an adjusted frequency; and
(c) a processing circuit adapted to:
(i) compare the adjusted frequency to the predetermined frequency; and
(ii) set load shedding priorities for the local system based on the comparison of the adjusted frequency to the predetermined frequency.
2. The load shedding system according to claim 1 , wherein the signal generator provides localized readings of frequency and power carried by the local system.
3. The load shedding system according to claim 1 , wherein the signal generator generates a signal equal to a frequency measured at the local system.
4. The load shedding system according to claim 1 , wherein the signal generator generates a signal equivalent to a power carried and measured at the local system.
5. The load shedding system according to claim 1 , wherein the processing circuit includes a processor for setting the load shedding priorities.
6. The load shedding system according to claim 1 , wherein the processing circuit compares data from the signal generator and the modifying circuit to predetermined frequencies.
7. The load shedding system according to claim 1 , wherein the signal generator provides localized readings of frequency and power carried by feeders of the local system.