基于改进样板机法的风光互补新能源电站容量配比优化
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TM614

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国网青海省电力公司科技项目(基于清洁能源泛在调度控制的新能源发电性能精细化评估方法研究及应用)(522830190018);国家自然科学基金(51707092);江苏省配电网智能技术与装备协同创新中心开放基金项目资助(No. XTCX202001)


Capacity ratio optimization of wind-solar hybrid new energy power station based on improved model-generator method
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    摘要:

    风光电站出力具有间歇性和波动性,合理的风光容量配比可以充分实现二者的互补。不准确的电站理论功率计算会影响风光真实特征的提取,导致较大的容量配比误差。文中在新能源电站理论功率计算通常所采用的样板机法的基础上进行改进,首先对异常数据进行识别及重构;然后识别新能源电站中的异常样板机并更新样板机集合,并根据非样板机的实际运行情况选取动态信息窗,利用动态信息窗内样板机和非样板机的实测功率,对非样板机分组并动态识别每组非样板机的比例系数,从而计算新能源电站的理论功率。基于多年历史理论功率的计算对新能源电站进行特征分析,并据此模拟随机出力场景,提出了基于源荷不匹配风险的风光容量配比优化方法。通过算例验证了改进样板机法的准确性,利用该方法得到西北某地区电网风电场、光伏电站多年的改进理论功率数据,并优化得到该地区的风光容量最优配比。文中所提改进样板机法可有效提高新能源电站理论功率的计算精度,基于该方法计算得到的风光容量最优配比可为地区电网风光发电容量提供参照。

    Abstract:

    The output of wind and solar power stations is intermittent and fluctuating,but their complementarity can be fully realized with reasonable wind-solar capacity ratio. The inaccurate theoretical power calculation of power station affects the extraction of true features of wind and solar,and then leads to large capacity matching error. The model-generator method commonly used in theoretical power calculation of new energy power stations is improved in this study. The abnormal data are firstly identified and reconstructed,and then the abnormal model-generators are identified and updated. Furthermore,according to the actual operation of non-model-generators,the dynamic information window is selected. By using the measured power of model-generator and non-model-generator in the dynamic information window,the non-model-generators are grouped and the scale coefficient of each group of non-model-generator is dynamically identified,and thus the theoretical power of new energy power stations is calculated. Based on the calculation of historical theoretical power for many years,the characteristics of new energy power stations are analyzed. The random output scenario is simulated accordingly,and the optimization method of wind-solar capacity ratio based on the risk of source-load mismatching is established. The accuracy of the improved model-generator method is verified by examples. By using this method,the improved theoretical power data of wind farm and photovoltaic power stations in a certain area of northwest China are obtained,and the optimal ratio of wind-solar capacity in this area is optimized. The improved model machine method proposed in this paper can effectively improve the calculation accuracy of theoretical power of new energy power stations,and the optimal ratio of wind-solar capacity calculated based on this method can provide reference for wind-solar power generation capacity of regional power grid.

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李延和,杨立滨,郝丽丽,刘祥风,吕肖旭.基于改进样板机法的风光互补新能源电站容量配比优化[J].电力工程技术,2022,41(2):224-233

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  • 收稿日期:2021-10-29
  • 最后修改日期:2022-01-13
  • 录用日期:2021-05-25
  • 在线发布日期: 2022-03-24
  • 出版日期: 2022-03-28