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Deep Learning Based Prediction Method of Long-term Photovoltaic Power Generation Using Meteorological and Seasonal Information

기후 및 계절정보를 이용한 딥러닝 기반의 장기간 태양광 발전량 예측 기법

  • Lee, Donghun (Department of Industrial and Management Engineering, Incheon National University) ;
  • Kim, Kwanho (Department of Industrial and Management Engineering, Incheon National University)
  • Received : 2018.11.09
  • Accepted : 2019.01.29
  • Published : 2019.02.28
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Abstract

Recently, since responding to meteorological changes depending on increasing greenhouse gas and electricity demand, the importance prediction of photovoltaic power (PV) is rapidly increasing. In particular, the prediction of PV power generation may help to determine a reasonable price of electricity, and solve the problem addressed such as a system stability and electricity production balance. However, since the dynamic changes of meteorological values such as solar radiation, cloudiness, and temperature, and seasonal changes, the accurate long-term PV power prediction is significantly challenging. Therefore, in this paper, we propose PV power prediction model based on deep learning that can be improved the PV power prediction performance by learning to use meteorological and seasonal information. We evaluate the performances using the proposed model compared to seasonal ARIMA (S-ARIMA) model, which is one of the typical time series methods, and ANN model, which is one hidden layer. As the experiment results using real-world dataset, the proposed model shows the best performance. It means that the proposed model shows positive impact on improving the PV power forecast performance.

최근 온실가스의 증가로 인한 기후변화 대응의 필요성과 전력수요의 증가로 인해 태양광발전량(PV) 예측의 중요성은 급격히 증가하고 있다. 특히, 태양광 발전량을 예측하는 것은 합리적인 전력 가격결정과 시스템 안정성 및 전력 생산 균형과 같은 문제를 효과적으로 해결하기 위해 전력생산 계획을 합리적으로 계획하는데 도움이 될 수 있다. 그러나 일사량, 운량, 온도 등과 같은 기후정보 및 계절 변화로 인한 태양광 발전량이 무작위적으로 변화하기 때문에 정확한 태양광 발전량을 예측하는 것은 도전적인 일이다. 따라서 본 논문에서는 딥러닝 모델을 통해 기후 및 계절정보를 이용하여 학습함으로써 장기간 태양광 발전량 예측 성능을 향상시킬 수 있는 기법을 제안한다. 본 연구에서는 대표적인 시계열 방법 중 하나인 계절형 ARIMA 모델과 하나의 은닉층으로 구성되어 있는 ANN 기반의 모델, 하나 이상의 은닉층으로 구성되어 있는 DNN 기반의 모델과의 비교를 통해 본 연구에서 제시한 모델의 성능을 평가한다. 실데이터를 통한 실험 결과, 딥러닝 기반의 태양광 발전량 예측 기법이 가장 우수한 성능을 보였으며, 이는 본 연구에서 목표로 한 태양광 발전량 예측 성능 향상에 긍정적인 영향을 나타내었음을 보여준다.

Keywords

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