| 引用本文: | 钱嫱,孙国强,徐伟,严明辉,卫志农,臧海祥,陈醒.改进的基于复数域标幺化的快速解耦状态估计算法[J].电力自动化设备,2019,39(6): |
| QIAN Qiang,SUN Guoqiang,XU Wei,YAN Minghui,WEI Zhinong,ZANG Haixiang,CHEN Xing.Improved fast decoupled state estimation algorithm based on complex normalization[J].Electric Power Automation Equipment,2019,39(6): |
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| 摘要: |
| 当前基于复数域标幺化的配电网快速解耦状态估计算法仍存在部分支路阻抗比绝对值较大影响算法收敛性能的问题。针对该问题，提出了改进的基于复数域标幺化的快速解耦状态估计算法。在电压和功率的基准值中引入相角进行复数域标幺化，并对标幺化后阻抗比绝对值较大的支路进行串联补偿。该串联补偿方法通过给予待补偿支路1个附加电抗以减小支路阻抗比，同时串联1条虚拟支路以消除附加电抗对支路参数的影响，而最优补偿电抗的取值由各支路阻抗比绝对值的均值决定。分别在IEEE 33节点的对称配电系统和IEEE 13、123节点的不对称配电系统中对改进的基于复数域标幺化的快速解耦状态估计算法进行测试与分析。 |
| 关键词: 配电网 状态估计 串联补偿 并联补偿 复数域标幺化 快速解耦 |
| DOI：10.16081/j.issn.1006-6047.2019.06.022 |
| 分类号:TM761 |
| 基金项目:国家自然科学基金资助项目(51277052)；国家重点研发计划“智能电网技术与装备”专项“互联大电网高性能分析和态势感知技术”项目(2018YFB0904500) |
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| Improved fast decoupled state estimation algorithm based on complex normalization |
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QIAN Qiang1, SUN Guoqiang1, XU Wei2, YAN Minghui2, WEI Zhinong1, ZANG Haixiang1, CHEN Xing3
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1.College of Energy and Electrical Engineering, Hohai University, Nanjing 210098, China;2.NARI Technology Co.,Ltd.,Nanjing 211106, China;3.State Grid Xuzhou Power Supply Company, Xuzhou 221000, China
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| Abstract: |
| At present, the convergence performance of the fast decoupled state estimation algorithm based on complex normalization is still affected by the large absolute value of impedance ratio of some branches. In order to solve this problem, an improved fast decoupled state estimation algorithm based on complex normalization is proposed. An angle reference is introduced into the reference values of voltage and power to implement the complex normalization, and then the series compensation is carried out for the branches with large absolute value of impedance ratio after normalization. The impedance ratio of branch to be compensated is reduced by giving an additional reactance and the influence of this additional reactance on the parameters of this branch is eliminated by connecting a virtual branch in series, and the value of the optimal compensation reactance is determined by the mean of the absolute impedance ratio of each branch. The improved fast decoupled state estimation algorithm based on complex normalization is tested and analyzed in the symmetrical IEEE 33-bus distribution system and the asymmetrical IEEE 13-bus and 123-bus distribution systems respectively. |
| Key words: distribution network state estimation series compensation parallel compensation complex normalization fast decoupling |
