US 12,218,629 B2
Solar power leveling system via string-based power compensation
Ki Taek Song, Jeju-si (KR); Cheol Song Lee, Jeju-si (KR); Kyung Rok Kim, Jeju-si (KR); and Jun Woo Kim, Jeju-si (KR)
Assigned to E2Z CO., LTD., Jeju-si (KR)
Appl. No. 18/268,260
Filed by E2Z CO., LTD., Jeju-si (KR)
PCT Filed Dec. 22, 2020, PCT No. PCT/KR2020/018852
§ 371(c)(1), (2) Date Jun. 19, 2023,
PCT Pub. No. WO2022/139003, PCT Pub. Date Jun. 30, 2022.
Prior Publication US 2024/0056026 A1, Feb. 15, 2024
Int. Cl. H02S 40/36 (2014.01); G01R 31/382 (2019.01); H02J 7/00 (2006.01); H02J 7/35 (2006.01); H02S 40/32 (2014.01); H02S 50/10 (2014.01)
CPC H02S 40/36 (2014.12) [G01R 31/382 (2019.01); H02J 7/0068 (2013.01); H02J 7/35 (2013.01); H02S 40/32 (2014.12); H02S 50/10 (2014.12)] 8 Claims
OG exemplary drawing
 
1. A solar power leveling system, comprising:
a plurality of strings each having a plurality of solar panels connected to each other in series;
a connection board for collecting power from the plurality of strings connected to each other in parallel and delivering the power, and performing a function of a protective function of a power system;
an inverter for converting DC power generated using the solar panels into AC power and supplying the AC power to a consumer;
a measurement link device connected to each of the plurality of strings to minimize a power deviation between the strings; and
a power compensation device connected to the measurement link device to perform charging or discharging with respect to an output-reduced string among the plurality of strings,
wherein the measurement link device is configured to connect the output-reduced string to the power compensation device, and control charging or discharging with power for the output-reduced string depending on an amount of power stored in the power compensation device, and
the power compensation device is configured as a device capable of fast charging and to be quickly charged with generated power from the output-reduced string, and
when compensation is performed for a plurality of the output-reduced strings, total string outputs according to compensation powers equal for each of the plurality of the output-reduced strings are compared to determine the compensation power for achieving maximum output.