| 引用本文: | 张旭,陈云龙,王仪贤,岳帅,查效兵.基于潮流断面修正的含风电电网无功-电压分区方法[J].电力自动化设备,2019,39(10): |
| ZHANG Xu,CHEN Yunlong,WANG Yixian,YUE Shuai,ZHA Xiaobing.Reactive power-voltage partitioning of power grid with wind power based on correction of power flow section[J].Electric Power Automation Equipment,2019,39(10): |
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| 摘要: |
| 在风电接入的背景下，为了获得相对稳定同时满足风电波动时电压控制要求的合理分区，在牛顿-拉夫逊法中雅可比矩阵的基础上，采用逐次递归方法得到系统的全维灵敏度矩阵，通过建立全维空间电气距离矩阵反映系统所有节点间电气耦合关系的强弱；采用基于各潮流状态下风电概率模型和各节点电压值的电气距离矩阵修正系数，建立表征风电波动导致系统潮流状态动态变化的量化关系式，以修正后的各潮流状态下电气距离矩阵之和为分区依据，采用凝聚层次聚类方法进行全网分区；利用主成分分析法对修正后的电气距离矩阵进行降维，快速准确地得到系统分区数，以区域耦合度和区域无功平衡度2个指标对分区质量进行量化评估。对改进的IEEE 39和IEEE 118节点系统进行仿真，仿真结果表明所提分区方法能够有效地满足风电接入下获得稳定电网分区的要求，保证系统的安全、稳定运行。 |
| 关键词: 无功-电压分区 风电 主成分分析法 区域耦合度 区域无功平衡度 层次聚类 潮流 |
| DOI：10.16081/j.epae.201908033 |
| 分类号:TM614;TM761 |
| 基金项目:国家重点研发计划资助项目(2017YFB0902600) |
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| Reactive power-voltage partitioning of power grid with wind power based on correction of power flow section |
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ZHANG Xu1, CHEN Yunlong1, WANG Yixian1, YUE Shuai2, ZHA Xiaobing3
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1.School of Electrical & Electronic Engineering, North China Electric Power University, Beijing 102206, China;2.Zhenjiang Power Supply Company, State Grid Jiangsu Electric Power Co.,Ltd.,Zhenjiang 212000, China;3.State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 211102, China
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| Abstract: |
| In the context of wind power integration, a reasonable partition while satisfying the voltage control requirements with wind power fluctuations, the system’s full-dimensional sensitivity matrix is obtained by successive recursive method based on the Jacobian matrix in the Newton-Raphson method. The full-dimensional spatial electrical distance matrix is established to reflect the electrical coupling relationship among all nodes in the system. The electrical distance matrix correction coefficients based on the wind power probability model and each node’s voltage value under each power flow state are used to establish the quantitative relationship to characterize the dynamic change of power flow state caused by wind power fluctuations. The corrected electrical distance matrix under each power flow state is used as the partition basis and the whole network is partitioned by the condensed hierarchical clustering method. The PCA(Principal Component Analysis) method is used to reduce the dimension of the modified electrical distance matrix, and then the partition number of system is obtained quickly and accurately. The partition quality is quantitatively evaluated by two indexes of regional coupling degree and regional reactive power balance degree. The improved IEEE 39-bus and 118-bus system are simulated and simulative results show that the proposed partition method can effectively meet the requirements of obtaining stable grid partitions with wind power integration and ensure the safe and stable operation of the system. |
| Key words: reactive power-voltage partitioning wind power principal component analysis method regional coup-ling degree regional reactive power balance degree hierarchical clustering power flow |
