Patent ID: 11966242
Assignee: ENPHASE ENERGY, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H  Y | IPC G  H

Claim 7:
8. Apparatus for load-based primary regulation in a power system, comprising:
a controller, comprising at least one processor, that:
receives information pertaining to each load of a plurality of loads in a power distribution system;
generates, using the information, a plurality of combinations of operating states for the plurality of loads that provides a pseudo-linear response for all the plurality of loads;
generates a look up table (LUT) that comprises the plurality of combinations of operating states;
transmits the LUT to each load of the plurality of loads for use by the plurality of loads in primary regulation so that each load of the plurality of loads can respond to fluctuations of other loads within the power system and coordinate a control action that provides enough time for each load of the plurality of loads to relax into steady-state operation; and
based on incrementing or decrementing information included in the LUT and received at a limit-cycle detection and prevention (LDP) circuit programmed to decrement at a fixed rate corresponding to a flicker rate of each load of the plurality of loads, autonomously detecting when limit-cycle oscillations are above the fixed rate and automatically increasing a hysteric coefficient in the LUT to eliminate the limit-cycle oscillations.