US 12,155,296 B2
Current compensation system for photovoltaic generator, quality measurement device, measurement method thereof, and recording medium thereof
Sang Yeong Jeong, Ulsan (KR); and Jin Gook Kim, Ulsan (KR)
Assigned to EM CORETECH INC., (KR); and UNIST (ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY), (KR)
Appl. No. 17/766,811
Filed by EM CORETECH INC., Ulsan (KR); and UNIST (ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY), Ulsan (KR)
PCT Filed Oct. 7, 2020, PCT No. PCT/KR2020/013652
§ 371(c)(1), (2) Date May 23, 2022,
PCT Pub. No. WO2021/071241, PCT Pub. Date Apr. 15, 2021.
Claims priority of application No. 10-2019-0123971 (KR), filed on Oct. 7, 2019; and application No. 10-2019-0123972 (KR), filed on Oct. 7, 2019.
Prior Publication US 2023/0344336 A1, Oct. 26, 2023
Int. Cl. H02M 1/44 (2007.01); H02S 40/32 (2014.01)
CPC H02M 1/44 (2013.01) [H02S 40/32 (2014.12)] 12 Claims
OG exemplary drawing
 
1. An inverting system for solar generators, the inverting system comprising:
a solar inverter converting DC voltage to AC voltage;
an electromagnetic interference (EMI) filter unit comprising an active EMI filter to reduce noise corresponding to the AC voltage;
a power grid; and
at least two or more through lines passing a power current from the power grid to the solar inverter and passing through the EMI filter unit,
wherein the active EMI filter comprises
a sensing unit sensing the noise on the at least two or more through lines and generating an output signal corresponding to the noise,
an active circuit unit amplifying the output signal to generate an amplified signal,
a compensation unit generating a compensation current based on the amplified signal, and
a transmission unit providing a path through which the compensation current flows to each of the at least two or more through lines.