1. 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)
2. 国网智能电网研究院有限公司
3. 国网江苏省电力有限公司南通供电分公司
纸质出版:2025
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罗佳奕, 韩蓓, 汪可友, 等. 多源接入配电网动态等值的时域Kron物理推广模型[J]. 中国电机工程学报, 2025,(14):5504-5516.
罗佳奕, 韩蓓, 汪可友, 等. 多源接入配电网动态等值的时域Kron物理推广模型[J]. 中国电机工程学报, 2025,(14):5504-5516. DOI: 10.13334/j.0258-8013.pcsee.240177.
Kron化简是等值建模中经典的网络拓扑化简方式,常用于稳态等值建模。经典Kron化简仅适用于工频正弦波激励下的稳态网络,难以精确拟合动态及暂态过程。动态推广理论时域Kron化简虽具有更高动态拟合精度,但存在无法映射得到物理模型的缺点。针对时域Kron化简这一问题展开研究,发现通过高斯消去法获取化简零空间基向量,并在自由基赋值时每次仅给一个自由基赋值为1或-1,其余自由基赋值为0时,时域Kron化简能够映射明确物理模型,将该方法称为时域Kron物理推广。并对时域Kron物理推广模型的线路耦合特征、模型唯一性和化简效果进行分析。相较于时域Kron,所提物理推广模型具有直观物理意义,可适用于更广泛场景与仿真技术;相较于经典Kron,该模型具有更高的动态拟合精度和更简洁的化简拓扑形式。最后通过电磁暂态数值实验及Simulink仿真对上述方法进行验证。
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