| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a system interconnection inverter system in which fault in the transform operation of a master inverter can be prevented when the output power of a DC power supply changes suddenly. <P>SOLUTION: The inverter system consists of a plurality of inverters (one is a master inverter and the remains are slave inverters) connected in parallel. The master inverter operates next power command value Pc based on the output powers from its own inverter and the slave inverters acquired in the previous communication cycle at a period T, alters total output of the system by transmitting the power command value Pc to the slave inverters, and makes each slave inverter reserve its output power (processing a). After terminating the processing a, the master inverter communicates with the slave inverters individually to acquire the reserved output powers (processing b). When rapid decrease in quantity of sunlight is detected in the processing b, the master inverter re-operates the next power command value Pc', based on the output power from its own inverter at the time of detection and the output power from the slave inverters acquired already, and alters total output of the system by transmitting that power command value Pc' to the slave inverters (processing c). <P>COPYRIGHT: (C)2008,JPO&INPIT |
