US 12,407,170 B2
PID effect suppression system
Wenping Zhang, Ningbo (CN); Yiming Wang, Ningbo (CN); Po Xu, Ningbo (CN); Wanshuang Lin, Ningbo (CN); and Baosong Liu, Ningbo (CN)
Assigned to GINLONG TECHNOLOGIES CO., LTD., Ningbo (CN)
Appl. No. 18/690,431
Filed by GINLONG TECHNOLOGIES CO., LTD., Ningbo (CN)
PCT Filed Aug. 24, 2023, PCT No. PCT/CN2023/114698
§ 371(c)(1), (2) Date Mar. 8, 2024,
PCT Pub. No. WO2024/066832, PCT Pub. Date Apr. 4, 2024.
Claims priority of application No. 202211209201.3 (CN), filed on Sep. 30, 2022.
Prior Publication US 2025/0226665 A1, Jul. 10, 2025
Int. Cl. H02J 3/38 (2006.01); H02S 40/36 (2014.01)
CPC H02J 3/38 (2013.01) [H02S 40/36 (2014.12); H02J 2300/24 (2020.01)] 9 Claims
OG exemplary drawing
 
1. A PID (Potential Induced Degradation) effect suppression system, comprising:
a photovoltaic system; the photovoltaic system is connected with a power grid;
at least one voltage source topology module; an output end of the voltage source topology module is connected with busbar neutral points of the photovoltaic system; a common earth end of the voltage source topology module is earthed, and then the potential to earth of a photovoltaic panel group in the photovoltaic system is improved through the suppression voltage output by the voltage source topology module; wherein, the suppression voltage is at least ½ of the output voltage of the photovoltaic panel group;
a balanced circuit; when the voltage source topology module gets power from busbars, the balanced circuit can be connected between the output end of the voltage source topology module and the common earth end; if deviation occurs on the busbar neutral point voltage of the photovoltaic system, the balanced circuit is suitable for being connected with the voltage source topology module, and then the deviation voltage of the busbars can be effectively balanced;
the balanced circuit comprises a path unit and a load; when voltage deviation occurs on positive busbars or negative busbars, the path unit is suitable for connecting the load with a suppression circuit formed by the corresponding voltage source topology module.