Okinawa Institute of Science and Technology

The Okinawa Institute of Science and Technology is an interdisciplinary graduate school offering a 5-year PhD program in Science. Over half of the faculty and students are recruited from outside Japan, and all education and research is conducted entirely in English.

1919-1 Tancha, Onna, Kunigami District, Okinawa Prefecture 904-0495, Japan

Renewable Energy Forecast Error

managed by Okinawa Institute of Science and Technology


In renewable energy, utility operators use forecast models to predict energy fluctuations over a future time horizon to account for operating reserves, and protect grid infrastructure from instabilities. These models are of limited accuracy and as a result operating reserves may be inadequate or over-provided, and grid instabilities may be caused by under or over production of power. Forecasting enables operators to manage varying levels of power generation and operate equipment efficiently and traders to make marketing decisions. However, it has been reported by an operator that over the 5 year period 2008-2013 wind power failed to meet forecast 58% of the time.
This technology makes it possible to quantify two errors, used to qualify and improve forecast models, protecting against losses in revenue and grid instabilities caused by energy fluctuations.


Minimal data is required to perform forecast error analysis; time series for actual power generated and forecast power.
Applicable to any data sampling rate.


This technology validates forecast models and does not generate forecast models


Wind power
Solar power
Ocean power


Readiness Level (TRL)

technology validated in relevant environment
"Technology validated with industry data"
(The pie chart refers to the entire portfolio contained in the database of the helpdesk)

Technology Readiness Levels (TRL) are a method of estimating technology maturity of Critical Technology Elements (CTE) of a program during the acquisition process. The use of TRLs enables consistent, uniform, discussions of technical maturity across different types of technology.

Patent Grading Report

Patent Grading Report

The Grading Patents Report evaluates and grades US patents

Sample Buy from Wisdomain


Current status

PCT Application


Available for



Collective Interactions Unit

EU-Japan Centre
European CommissionMeti