| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reactive power compensating device capable of dealing with cooperative operation and steep voltage variation even if a plurality of reactive power compensating devices are installed in one electric power system. <P>SOLUTION: The reactive power compensating device performs constant voltage control which supplies a reactive power to an electric power system so that a system voltage may be held constant. The reactive power compensating device supplies a reactive power so that the system voltage becomes within a setting width (V<SB POS="POST">C</SB>-V<SB POS="POST">L</SB><system voltage<V<SB POS="POST">C</SB>+V<SB POS="POST">H</SB>) which has respective widths in the upper and lower sides of a reference voltage setting value V<SB POS="POST">C</SB>, and changes the reference voltage setting value V<SB POS="POST">C</SB>gradually by comparing an average value Σ at sampling-time T<SB POS="POST">S</SB>of the system voltage with the reference voltage setting value V<SB POS="POST">C</SB>so that the system voltage may become within a setting width (V<SB POS="POST">C</SB>-V<SB POS="POST">L</SB><system voltage<V<SB POS="POST">C</SB>+V<SB POS="POST">H</SB>) of the reference voltage setting value V<SB POS="POST">C</SB>. Therefore, while the cooperative operation is possible even if a plurality of reactive power compensating devices are installed in one electric power system, the voltage variation in the electric power system can be surely dealt with. <P>COPYRIGHT: (C)2012,JPO&INPIT |
