| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for preventing reverse power flow in an electric power plant wherein the production of reverse power flow is prevented without fail against fluctuation in burden and power generation output is kept equal to the load. <P>SOLUTION: Required power suitable for a load in an on-premisses distribution system 1 is supplied from an off-premises commercial power supply 2 and a micro gas turbine generator 3 disposed on the premisses. An output instruction value is commanded from an external controller 5 to control the output power outputted from the micro gas turbine generator 3. Underpower equivalent to the difference between the load and the output power of the micro gas turbine generator 3 is supplied at a network connection point from the commercial power supply 2 to the distribution system 1. With the difference between a preset value of network connection point power and the value of network connection point power measured at the network connection point taken as an index, the output instruction value is adjusted to increase or decrease the output power of the micro gas turbine generator 3. Thus, the network connection point power is kept equal to the preset value of network connection point power or within a preset allowable range including the preset value of network connection point power by increasing or decreasing the output power. <P>COPYRIGHT: (C)2004,JPO |
