Abstract
The feed-in tariff (FIT) programs resulted in rapid growth of renewable power sources in various countries. In Japan, the program particularly triggered explosive growth of solar power generations because of its short lead-time and high tariff level. Although mass introduction of renewable power sources certainly contributes to reduce CO2 emissions, it causes serious instability issues in power systems. One of the most serious issues is management of imbalances resulting from forecast errors in solar power generations. These imbalances must be compensated so as to keep stable operation in power systems. On the other hand, local power retail companies are increasing nowadays in various countries including Japan. These companies are mainly procuring renewable power sources such as solar power systems.Taking these circumstances into consideration, this article aims at exploring measures to manage the imbalances of power systems by local power retail companies. For this purpose, we developed a model in mixed integer linear programming to operate power systems dealing with the imbalances. Evaluated results using the model indicated the followings; appropriate adoption of stationary or home batteries is shown to economically compensate the imbalances by local power retail companies.
Highlights
Paris agreement, which was adopted in 2015, is a significant international framework to reduce greenhouse gas emissions from 2020
Ministry of Economy, Trade and Industry in Japan issued the long-term outlook for energy supply and demand in 2015, which is consistent with the above plan
The solar power generation is placed as a second renewable power source following the hydraulic power generation
Summary
Paris agreement, which was adopted in 2015, is a significant international framework to reduce greenhouse gas emissions from 2020. Local power retail companies are increasing nowadays in various countries including Japan These companies are mainly procuring renewable power sources such as solar power generation systems. Taking these circumstances into consideration, it is significant for the local power retail companies to reduce the imbalances by themselves. If they can appropriately manage and compensate the imbalances, that contributes to the stable management of entire power systems. Regarding analyses in this field, Takahashi [4] developed a mathematical model to operate power systems in the uncertainty. We aim at developing technological systems to manage and compensate the imbalances for the local power retail companies
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