A Laplace-Domain Circuit Model for Fault and Stability Analysis Considering Unbalanced Topology
A Laplace-Domain Circuit Model for Fault and Stability Analysis Considering Unbalanced Topology
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考虑不平衡拓扑的故障和稳定性分析拉普拉斯域电路模型
DOI：
10.1109/tpwrs.2022.3230564
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发表时间：
2023
影响因子：
6.6
通讯作者：
Fan, Lingling
中科院分区：
文献类型：
--
作者：
Miao, Zhixin;Fan, Lingling
对于具有不平衡故障的系统，建立稳定性评估的分析模型是一项具有挑战性的任务。这封信提出了一个简单的建模方法。通过使用拉普拉斯变换变量，实现了广义动态电路表示。将故障点处的电压电流关系转化为三个子系统之间的关系。最后的电路模型是一个互连的序列网络与阻抗在拉普拉斯域。该电路可以直接从稳态时序网络转换而来。通过一个感应电动机通过串联补偿线路由电网供电的例子来说明这个建模过程。电磁暂态仿真结果表明，次同步振荡可以减轻时，单线接地故障施加在电动机端。基于动态电路的稳定性分析结果证实了仿真结果。更重要的是，推导出的电路毫不费力地揭示了为什么不平衡可以提高稳定性。
For systems subject to unbalanced faults, analytical model building for stability assessment is a challenging task. This letter presents a straightforward modeling approach. A generalized dynamic circuit representation is achieved by use of the Laplacian transform variable. We translate the voltage and current relationship at the fault location into the relationship of three subsystems. The final circuit model is an interconnected sequence network with impedances in the Laplace domain. This circuit can be directly converted from a steady-state sequence network. This modeling procedure is illustrated by an example case of an induction motor served by a grid through a series compensated line. Electromagnetic transient simulation results demonstrate that sub-synchronous oscillations can be mitigated when a single-line to ground fault is applied at the motor terminal. Stability analysis results based on the dynamic circuit corroborate the simulation results. What's more, the derived circuit effortlessly reveals why unbalance can enhance stability.
DOI：
10.1109/pess.2000.868834
发表时间：
2000-07
期刊：
2000 Power Engineering Society Summer Meeting (Cat. No.00CH37134)
影响因子：
--
作者：
Aleksandar M. Stankovic;T. Aydin
通讯作者：
Aleksandar M. Stankovic;T. Aydin
利用相位不平衡的次同步谐振对策
DOI：
--
发表时间：
1993
期刊：
影响因子：
--
作者：
A. Edris
通讯作者：
A. Edris