| 引用本文: | 李东东,董 楠,姚 寅,徐 波.考虑频率响应分散性及系统分区的含风电系统等效惯量估计[J].电力系统保护与控制,2023,51(3):36-45.[点击复制] |
| LI Dongdong,DONG Nan,YAO Yin,XU Bo.Equivalent inertia estimation of a power system containing wind power considering dispersion offrequency response and system partitioning[J].Power System Protection and Control,2023,51(3):36-45[点击复制] |
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| 摘要: |
| 随着电力系统中新能源机组渗透率的快速提高，系统惯量水平下降将威胁系统频率稳定性，惯量的空间分布特征也将更加凸显，频率响应的分散性将不能被忽略。针对以上问题，提出一种考虑频率响应分散性及系统分区的含风电电力系统等效惯量估计方法。首先，为降低频率响应分散性对估计精度的影响，基于谱聚类算法对电力系统进行分区，并基于皮尔逊相关系数定义频率相似度指标确定区域频率的最优测量节点。其次，由于测量所得的频率变化率(rate of change of frequency, RoCoF)曲线中包含大量的振荡分量，提出一种基于摇摆方程的数值积分方法估计区域及系统全局惯量。最后，在DIgSILENT/PowerFactory中建立改进IEEE10机39节点系统以验证所提方法的有效性。仿真结果表明，该方法适用于不同场景下含风电系统的等效惯量估计。 |
| 关键词: 低惯量 惯量估计 区域惯量 频率分散性 |
| DOI：10.19783/j.cnki.pspc.220472 |
| 投稿时间：2022-04-05修订日期：2022-08-13 |
| 基金项目:国家自然科学基金项目资助(51977128) |
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| Equivalent inertia estimation of a power system containing wind power considering dispersion offrequency response and system partitioning |
| LI Dongdong,DONG Nan,YAO Yin,XU Bo |
| ((College of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China)) |
| Abstract: |
| With the rapid increase of the penetration rate of renewable energy sources in the power system, the decrease of system inertia will threaten frequency stability. Moreover, the spatial distribution characteristic of inertia will be more evident and the dispersion of frequency response cannot be ignored. An equivalent inertia estimation method for the system containing wind power considering the influence of the dispersion of frequency response and system partitioning is proposed. First, in order to reduce the influence of the dispersion of frequency response on estimation accuracy, the power system is partitioned based on a spectral clustering algorithm. A frequency similarity index is defined based on Pearson's correlation coefficient to locate the optimal measurement nodes of the area frequency. Then, since the rate of change of frequency (RoCoF) index contains a lot of oscillating components, a numerical integration method based on a swing equation is proposed to estimate the area inertia and system global inertia. Finally, the modified IEEE 10-generator 39-bus system is established in DIgSILENT/PowerFactory to verify the effectiveness of the proposed method. The simulation results show that the proposed method is applicable for the equivalent inertia estimation of a power system with wind power in different scenarios.
This work is supported by the National Natural Science Foundation of China (No. 51977128). |
| Key words: low inertia inertia estimation area inertia dispersion of frequency |
