Abstract
In recent years, distributed generations (DG) interconnected to power distribution system increase in order to cope with global environment problems in Japan. We are worried that it is difficult to control system voltage in power distribution system. We study about influence of DG to conventional operation and control of power distribution system and develop operation method by using control function of DG and distribution system. Moreover, we are worried that system voltage rise by capacitors of middle voltage customers to improve power factor (pf) and it is necessary to request capacity of capacitor become suitable and capacitors are open at light load. Under this circumstance, we cannot estimate this influence in detail because we don't have the analysis tool that can model voltage control by distribution system, power factor control by customer and voltage control function of DG. In this paper, we develop the analysis tool “CALDG” by using graphical user interface that can model voltage control by distribution system, pf control by customer and voltage control function of DGs. (4 pages)
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