Safety mechanisms, wake up and shutdown methods in distributed power installations
摘要
說明書
In step 605, communications signal, e.g. 100 Hz, is superimposed on serial string 203,423 either from signaling mechanism 420 or from inverter 204 for instance when at least a 50 Watt load is attached to the output of inverter 204. In decision box 607, when the specified input voltage is reached, e.g. 400V for inverter 204, inverter 204 is turned on or inverter 104 is attached to serial string 423 by mechanism 420. In decision box 609, if a time out occurs before the minimum specified input voltage is reached of inverter 204,404 then inverter is returned to the off or standby state (step 601). Otherwise inverter 204,404 is connected or turned on in step 611. Inverter 204, 404 remains on and connected unless a warning condition (decision box 613) occurs. Possible warning conditions include, (i) disconnection from the electrical grid, (ii) electrical grid stops producing power (islanding), (iii) less than 50 Watts transferred in the last minute, (iv) input voltage to inverter 204,404 is over the maximum limit, and (v) input power is over the maximum limit. If a warning condition occurs (decision box 613) communications signal is turned off (step 615) for inverter 404 or inverter 204 is turned off or put into standby.
