摘 要:利用基本灰色模型GM(1,1)法對某縣1994~2005年的全社會用電量進行預測,結果顯示預測精度較低,誤差較大。基于此,提出了一種電力系統中長期負荷預測的實用方法,即基于灰參數的等時段序列模型預測法。利用此方法預測該縣2006~2010年的電力負荷,實例分析表明,該方法預測精度較高,可作為中長期電力負荷預測的實用工具之一。
關鍵詞:灰色模型GM(1,1);電力負荷預測;灰參數;分等時段序列;擬合度
Load Forecasting of Grid Based on Equal Time Sequence Model of Gray Parameters
ZHU Zhuang-chun , YE Jian-feng
Hydraulic power plant of Ru Yuan county,Ruyuan 512700,Guangdong#8226;China
Abstract:The basic method, called GM (1, 1) has been used to forecast the whole social power consumption in one county from 1994 to 2005, but the result shows that precision is not very high. Based on this, it proposes a new metaphase long-term electric power load forecasting whose name is Equal Time Sequence Model of Gray Parameters. Using this method forecasts power consumption in the county from 2006 to 2010. The result shows that the precision is very high and can be used as one of practical tools in metaphase long-term load forecasting.
Key words:GM(1,1); Electric power load forecasting; Grey parameters; Equal time sequence;fitting degree
0 引言
準確的負荷預測,可以經濟合理地安排電力內部發電機組的啟停,保持電網運行的安全穩定性,減少不必要的旋轉儲備容量,合理安排機組檢修計劃,保證社會的正常生產和生活,有效地降低發電成本,提高經濟效益和社會效益[1]。現有的負荷預測方法主要有灰色預測法[2]、時間序列法[3-4]、神經網絡法[5]、模糊數學法[6]、專家系統法等[7]。本文提出了基于灰參數的等時段序列模型預測法,與傳統灰色預測法相比提高了預測精度。
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