| 摘要 |
A power conditioning circuit comprises a direct current supply 1, a DC to DC converter 4, a DC to AC inverter 6 which feeds an AC output to a supply line and a controller 5 which regulates the DC link voltage produced by the DC to DC converter 4. Alternating current supplied to the output may be regulated by controlling the DC link voltage which is input to the DC to AC converter 6. Controller 5 may have a first voltage input from the output of the DC to DC converter 4 and a second voltage input from the AC supply line. Controller 5 may control the duty cycle of a power switch (fig 6, M5) and may maintain a phase relationship between the output voltage of the DC-AC inverter 6 and the voltage of the mains power supply line. The circuit may also comprise a reactive element (fig 2b L1) between the output of the DC_AC converter and the AC mains supply line. Switches (fig 2b S1,S2) are controlled to connect and disconnect the circuit from mains supply under conditions judged by controller 5. The circuit may be used to regulate the output of a solar panel or a fuel cell. |
