机电-电磁暂态混合仿真多端口模型的比较分析

发布时间：2018-04-16 16:16

本文选题：机电—电磁 + 多端口　；参考：《电力系统自动化》2017年07期

【摘要】：机电—电磁暂态混合仿真在端口建模方面主要有两种方法:一种基于多端口诺顿等值电路在端口处进行直接的电路耦合(耦合模型);另一种是在电磁侧的端口与端口之间进行解耦,通过机电暂态计算进行间接耦合(解耦模型)。建立了稳态期间两种模型的数学模型,将机电暂态的计算过程考虑进解耦模型的等值电势,证明了稳态情况下解耦模型与耦合模型的一致性。考虑电磁侧直流输电系统的控制特性,推导了经扩展之后的两类模型的节点导纳矩阵。结合两种模型的节点导纳矩阵的特点,对两种模型进行了暂态特性的对比分析。理论和仿真结果表明,当扰动和故障发生在电磁侧时,两种模型在本地直流的换相失败现象的分析过程中表现基本一致,而对一回直流逆变侧故障引起其他直流的换相失败的分析,解耦模型的适应性较弱。两种模型在仿真建模中应进行合理选择。
[Abstract]:There are two main methods in the port modeling of electromechanical electromagnetic transient hybrid simulation: one is based on the multi-port Norton equivalent circuit and the other is the direct circuit coupling (coupling model) at the port; the other is at the port of the electromagnetic side and the other is at the port of the electromagnetic side.Decoupling between ports,Indirect coupling is carried out by electromechanical transient calculation (decoupling model).The mathematical models of the two models during the steady-state period are established. The equivalent potential of the decoupling model is taken into account in the calculation process of electromechanical transient state, and the consistency between the decoupling model and the coupling model in the steady state is proved.Considering the control characteristics of electromagnetic side HVDC transmission system, the node admittance matrix of two extended models is derived.Combined with the characteristics of the node admittance matrix of the two models, the transient characteristics of the two models are compared and analyzed.Theoretical and simulation results show that the two models are consistent in the analysis of local DC commutation failure when the disturbances and faults occur on the electromagnetic side.However, the decoupling model is weak in adaptability to the analysis of commutative failure of other DC caused by primary DC inverter fault.The two models should be reasonably selected in simulation modeling.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);
【分类号】：TM721.1;TM743

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