JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2010, Vol. 40 ›› Issue (2): 126-129.

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The  influence of  correlation  between  solar  irradiation  and  the  load  variation  on  grid-connected  photovoltaic  power  generation

MENG Xiang-xing1, YU Da-yang2,   HAN Xue-shan2, ZHAO Jian-guo3   

  1. 1. Heilongjiang Electric Power Co., Ltd., Harbin 150090, China;
    2. School of Electrical Engineering, Shandong University, Jinan 250061, China;
    3. State Grid  of China Technology College, Jinan 250002, China
  • Received:2010-02-26 Online:2010-04-16 Published:2010-02-26

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Abstract:

There is a correlation between  solar irradiation and  electricity demand, and thus  grid could deploy more photovoltaic (PV) electricity to substitute for  coal at the peak load time. The gradually decreasing cost will make  PV generation competitive when satisfying the peak load demand. With the annual irradiation and the regional grid load data record, the potential of the grid to accommodate PV electricity was analyzed without deploying  storage or decreasing the base-load units output. The result showed that to reduce the utilization factor from 100％ to 95％, the PV electricity cost only increased by 4.8％, but the penetration of PV electricity increased from 3％ to 7％. It’s illustrated that even without  storage, the PV generation could still satisfy a remarkable portion of the grid electricity demand.

Key words:  grid-connected, photovoltaic power generation, correlation

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