| 摘要 |
A power supply system and a power supply method, which relate to the field of photoelectricity, and can save the cost of a leading wire between the positive electrode or the negative electrode of a cell panel and a direct-current voltage source. The power supply system comprises a cell panel group string (10), an inverter (20) connected to the cell panel group string (10) and a transformer (30) connected to the inverter (20), and the power supply system also comprises a voltage controller (40). The voltage controller (40) comprises a first terminal (401), a second terminal (402) and a third terminal (403), wherein the first terminal (401) is connected to a first output end (201) of the inverter (20), the second terminal (402) is connected to a second output end (202) of the inverter, and the third terminal (403) is connected to a third output end (203) of the inverter; and the voltage controller (40) also comprises a first sampling unit (404), a control unit (405) connected to the first sampling unit (404) and an inversion unit (406) connected to both the first sampling unit (404) and the control unit (405). |
