计及光伏发电相关性的多重积分法概率潮流计算

发布时间：2019-07-21 12:56

【摘要】：光伏发电相关性以及波动性会对系统的运行产生影响,因此需要通过计及光伏出力相关性的概率潮流(probabilistic load flow,PLF)计算来获取系统运行特征量的统计信息。文中提出采用改进Nataf变换处理光伏相关性。在传统Nataf变换基础上,结合三阶多项式正态变换简化其计算。同时,为解决PLF的输入和输出变量之间非线性关系带来的计算复杂性,提出采用多重积分法(multiple integral method,MIM)和Gram-Charlier级数,仅需在少数输入点处进行潮流计算即可得到输出量统计特征的高精度结果。对IEEE 39节点系统进行仿真计算,结果验证了所提算法的有效性、准确性、计算高效性。与半不变量法的对比则验证了半不变量法的局限性以及MIM法的优良性能。
[Abstract]:The correlation and volatility of photovoltaic power generation will have an impact on the operation of the system, so it is necessary to obtain the statistical information of the operating characteristics of the system by taking into account the probabilistic power flow (probabilistic load flow,PLF (which takes into account the correlation of photovoltaic output). In this paper, an improved Nataf transform is proposed to deal with photovoltaic correlation. On the basis of the traditional Nataf transform, the calculation is simplified by combining the third-order polynomial normal transformation. At the same time, in order to solve the computational complexity caused by the nonlinear relationship between input and output variables of PLF, the multiple integration method (multiple integral method,MIM) and Gram-Charlier series are proposed. Only a few input points are needed to calculate the power flow, and the high precision results of output statistical characteristics can be obtained. The simulation results of IEEE 39 bus system show that the proposed algorithm is effective, accurate and efficient. Compared with the semi-invariant method, the limitation of the semi-invariant method and the excellent performance of the MIM method are verified.
【作者单位】：电力传输与功率变换控制教育部重点实验室(上海交通大学);
【基金】：国家高技术研究发展计划863计划资助项目(2014AA052003) 国家自然科学基金资助项目(51307107,51477098) 国家国际科技合作专项项目(2013DFG71630) 教育部博士点基金(20130073120034)~~
【分类号】：TM744

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