多电网调峰负荷分配问题的目标函数选取与求解

发布时间：2018-08-25 07:38

【摘要】：大电网平台下,利用优质电源协调多个省级电网间差异负荷对缓解中国电力系统日益严重的调峰压力具有非常突出作用。针对现有网际协调方式和优化方法调峰效果不理想尤其局部时段范围内余荷频繁波动问题,提出一种基于电网理想余荷过程(简称理想解)的调峰建模方法。该方法采用N近邻平滑和分段平滑两种方式均化多个相邻时段余荷以构造理想解,并将计算余荷与理想解偏差最小作为优化目标,以尽可能平滑各电网局部负荷波动。采用邻域搜索算法进行模型求解,通过可变步长动态改变可行搜索区域,以改善收敛速度和结果质量。华东电网直调水火电系统的仿真调度实例表明,所提模型与算法能切实协调上海、江苏、浙江、安徽四省(市)的峰值负荷差异,得到较以往优化建模方法更合理的日调度运行结果。
[Abstract]:Under the platform of large power grid, it is very important to use high quality power supply to coordinate the differential load between several provincial power systems to alleviate the increasingly serious peak-shaving pressure in China's power system. In order to solve the problem of frequent fluctuation of residual load in the range of local time, a peak shaving modeling method based on ideal residual load process (abbreviated as ideal solution) is proposed to solve the problem that the current methods of internetwork coordination and optimization are not satisfactory. In this method, N-nearest neighbor smoothing and piecewise smoothing are used to equalize the residual loads of several adjacent periods to construct ideal solutions, and the minimum deviation between the calculated residual load and the ideal solution is taken as the optimization objective to smooth the local load fluctuation as far as possible. The neighborhood search algorithm is used to solve the model and the feasible search region is changed dynamically by variable step size to improve the convergence speed and the result quality. The simulation example of direct water and thermal power system in East China Power Grid shows that the proposed model and algorithm can effectively coordinate the peak load differences in Shanghai, Jiangsu, Zhejiang and Anhui provinces (cities). The results of daily scheduling are more reasonable than those of the previous optimal modeling methods.
【作者单位】：大连理工大学;
【基金】：国家自然科学基金项目(51025934,51209031) 中国博士后科学基金特别资助(2013T60284)~~
【分类号】：TM743

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