Proposal and evaluation of an equipment operating method using solar radiation prediction in a zero energy house

Reina Oki*, Yugo Tsuneoka, Shingo Yamaguchi, Soma Sugano, Jun Nakagawa, Naoya Watanabe, Tatsuhiro Kobayashi, Shin Ichi Tanabe, Takashi Akimoto, Yasuhiro Hayashi, Shinji Wakao

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


Because of the increasing promotion of renewable energy such as photovoltaic (PV) panels in Japanese houses, the voltage increase and frequency adjustment of a city electrical distribution network system will be of concern. Therefore, self-consuming surplus electricity and leveling the reverse power flow is important in terms of reducing the smart grid network load and reducing the peak load of the smart grid network. The aim of this study was to acquire knowledge regarding methods of self-consuming surplus power as well as leveling the reverse power flow. An equipment operation method, termed “schedule control,” was proposed that changes the operational time of a heat pump water heater and the charging time of a storage battery according to solar radiation prediction. Because PV power fluctuates depending on weather and time zone, this method helps in self-consuming as much PV power generation as possible. By actual measurement and simulation results, it was confirmed that the schedule control of the heat pump water heater and storage battery was useful in self-consuming surplus power and leveling reverse power flow.

Original languageEnglish
Article number05003
JournalE3S Web of Conferences
Publication statusPublished - 2019 Aug 13
Event13th REHVA World Congress, CLIMA 2019 - Bucharest, Romania
Duration: 2019 May 262019 May 29

ASJC Scopus subject areas

  • General Environmental Science
  • General Energy
  • General Earth and Planetary Sciences


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