インバータ電源と同期発電機で構成するマイクログリッドの運転特性

摘要

Recently, the problem of global warming and resources depletion are becoming more serious. Therefore, new power generations such as photovoltaic generation and full cell are increasing. The microgrid composed of new power generations has been studied recently. The microgrid without utility power system will be examined in the future. We assume the isolated microgrid consists of a synchronous generator and an inverter power source. In this paper the stable operation of the isolated power system is studied in viewpoint of how larger capacity of the inverter power source compared to the capacity of the synchronous generator can be connected. The microgrid model consists of a synchronous generator, an inverter power source, a utility power system and loads. The control circuit of the inverter is provided with a constant voltage control and a constant active power control. The rating capacity of the synchronous generator is 3.0MW with AVR and GOV controls. The paper reports details of simulation and maxnum capacity of the inverter.%本稿では，インバータ電源と同期発電機で構成されるマイクログリッドにおいて，P－Q制御よりもP－V制御の方がはるかにインバータ電源の導入量が見込まれることを明らかにした．また，P－V制御のインバータ電源では，同期発電機容量に対して20倍でも安定する結果が得られた．このことから，インバータ電源を大量導入する場合はP－V制御の方がインバータの最大導入量が見込まれると考える．