大量の再生可能エネルギー電源が導入された電力系統における需要家の利便性と不確実性を考慮した多数台の可制御ヒートポンプ給湯機の統計的モデリングとその周波数制御への適用

摘要

電力自由化に伴う電力潮流の複雑化，大規模停電の発生，低炭素社会実現に向けた再生可能エネルギー導入の促進，省エネルギー機器等の増加による負荷構造の変化，経年設備の改修など，電力系統をとりまく状況が大きく変化する中で，スマートグリッドという新しい概念が注目されている。スマートグリッドは電力系統の将来像としての概念で，環境性，信頼性，経済性にすぐれ，前述の様々な問題を解決していくことができる電力系統を意味している。%Nowadays, electric power systems confront many problems, such as environmental issues, aging infrastructures, energy security, and quality of electricity supply. The smart grid is a new concept of a better future grid, which enables us to solve the mentioned problems with Information and Communication Technology (ICT). In this research, a number of Heat Pump Water Heaters (HPWHs), one of the energy efficient-use customer equipment, and Battery Energy Storage System (BESS) are considered as controllable equipment for the frequency control. The utilization of customer equipment such as HPWH for power system control is one of the key elements in the concept of Ubiquitous Power Grid, which was proposed by our research group as a smart grid in Japanese context. The frequency control using a number of HPWHs with thermal storage of hot water tank is evaluated. Moreover, a novel statistical modeling of controllable HPWHs taking into account customers' convenience and uncertainty is proposed.