| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved photovoltaic power generation system, which supplies electric power to load by interconnecting a power conversion device for converting a DC power into a AC power with a distributing system. SOLUTION: This system interconnecting type photovoltaic power generation system, which is provided with a solar battery 1, an inverter circuit 10 for converting the output of the solar battery 1 into AC power, a filter circuit for converting the AC output of the inverter circuit 10 into sine wave-shaped AC power, an output transformer 14 for supplying the sine wave-shaped AC power to a distributing a system, an inverter control circuit 17 for controlling the inverter circuit 10, and a switch 20 for separating the output transformer 14 from the distribution system 21, involves a tertiary winding 14C which shares an iron core with the output transformer 14, switching elements 2 to 5 which short-circuits the output of the tertiary winding 14C, an output voltage detector for the output transformer 14, and a protective circuit 25 which short-circuits the tertiary winding 14C by making the operation of the inverter control circuit 17 stop, and communicating the switching elements 2 to 5, when the output of the output voltage detector 18 exceeds a reference value. |
