METHOD OF PREDICTING TIME OF LOWERING OF FUTURE CURRENT VALUE OR FUTURE POWER GENERATION AMOUNT IN PHOTOVOLTAIC POWER GENERATION SYSTEM

Japanese Patent JP2016152675

A

PROBLEM TO BE SOLVED: To accurately advise the proper maintenance time in the future for a photovoltaic power generation system.SOLUTION: This method is to predict the future time when a module, a string, or a power controller causes lowering of not less than a specific level of a current value or a power generation amount from its present value or amount in a photovoltaic power generation system. Data of the current value or the power generation amount of the module, the string, or the power controller, which is a prediction target, and data of the current value or the power generation amount of another module, string, or power controller, which is another comparison target and has relevance concerning physical position adjacency relation, physical position space relation, similarity of past data values, and/or similarity of a structure to the prediction target are obtained, Absolute Degree Grey Incidence is calculated from the obtained data, the relevance of present data and the relevance of future data for the prediction target and the comparison target are calculated from the calculated Absolute Degree Grey Incidence using Digital Grey Prediction Model, and the future time when relevance of the future data lowered not less than the specific level from the relevance of the present data is produced between the prediction target and the comparison target is shown.SELECTED DRAWING: Figure 3

KASHIWA NAGAISA
GOTO TAKAYUKI
SUZUKI TSUNEYUKI
FUJIMOTO YOSHINARI
KATO KEISUKE
HASHIMOTO TSUKASA

JP2015028265A

August 22, 2016

February 17, 2015

Click for automatic bibliography generation  

ONAMBA CO LTD

H02S50/00; H02J3/00; H02J3/38; H02J13/00

Nobuaki Kazehaya
Noriko Asano

Previous Patent: PROTECTIVE RELAY DEVICE

Next Patent: DYNAMO-ELECTRIC MACHINE