Enphase Energy has patented a method and apparatus for load-based primary regulation in a power system. The technology involves generating operating states for loads to provide a pseudo-linear response, using a look-up table for coordination, and autonomously detecting and preventing limit-cycle oscillations. GlobalData’s report on Enphase Energy gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Enphase Energy, Smart energy mgmt systems was a key innovation area identified from patents. Enphase Energy's grant share as of March 2024 was 48%. Grant share is based on the ratio of number of grants to total number of patents.
Load-based primary regulation method and apparatus in power system
A recently granted patent (Publication Number: US11966242B2) discloses a method and apparatus for load-based primary regulation in a power system. The method involves receiving information about each load in a power distribution system, generating combinations of operating states for the loads to ensure a pseudo-linear response, creating a look-up table (LUT) with these combinations, and transmitting it to each load for primary regulation. The system autonomously detects and prevents limit-cycle oscillations by adjusting a hysteresis coefficient in the LUT. The apparatus includes a controller with a processor that performs similar functions, ensuring coordinated control actions among loads to maintain steady-state operation.
The patent also covers a non-transitory computer-readable medium containing a program that executes the method for load-based primary regulation. This program receives load information, generates combinations of operating states for pseudo-linear responses, creates a LUT, and transmits it to each load for primary regulation. Similar to the method and apparatus, the program includes features to prevent limit-cycle oscillations by adjusting the hysteresis coefficient in the LUT. The patent emphasizes the use of a knapsack algorithm to compute combinations of operating states and the inclusion of increment and decrement thresholds in the LUT, computed using a hysteresis coefficient ranging from 2 to 3. Overall, the patent aims to improve the efficiency and stability of power systems by enabling loads to respond to fluctuations and coordinate control actions effectively.
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