| Masahiro Watanabe | Energy and Environment Lab., Advanced Research Lab., |
| Yasunori Ono | T&D IT Gr., T&D Systems Project, Power & Industrial Systems R&D Lab., |
| Tomoharu Nakamura | Power & Industrial Systems Div., Power Systems, |
| Hidehiko Shimamura | Kokubu Works, Power Ststems, |
Distributed resources influence the electric supply reliability and the power quality of distribution systems. Therefore, we need to conduct initial evaluations and investigations of countermeasures. The Tokyo Electric Power Co., Inc. and Hitachi, Ltd. developed a power quality analysis system that enables calculating the power quality effect in advance and that supports analyzing improvement plans. However, customers who introduce distributed resources need a scheme to maintain economic efficiency, to control the heat and power of a co-generation system, and to optimize the active and reactive power control. Hitachi, Ltd. experimentally developed an operation system to optimize the operation of co-generation systems. Its effectiveness in a real-time simulator was evaluated. In this paper, the overview of a power quality analysis system and an operation system for the co-generation system is described, and a micro-grid system control scheme is introduced.
 | The Hitachi Hyoron (Japanese Only) |
power system, distribution system, distributed generator, power quality
