基于ADPSS电磁暂态模型库的三相潮流建模与计算方法

Research of Three-Phase Load Flow Modeling and Method Based on ADPSS Electromagnetic Transient Model Library

为了实现ADPSS电磁暂态仿真的平稳启动,开展了基于电磁暂态模型库的三相潮流建模和计算方法研究,并在ADPSS中开发了三相潮流计算程序。文中首先把大量电磁暂态模型进行分类建模,研究变压器接法对系统相角的影响,建立兼容多种接法的变压器模型;然后研究了各种三相潮流算法,从前景和实用性考虑选用牛顿法,并设置3类特殊节点满足不对称计算要求;最后,通过前2个算例验证了新程序计算结果的正确性,后两个算例则演示了利用新潮流结果为电磁暂态仿真提供初值的易用性。

In order to smooth ADPSS electromagnetic transient simulation, three-phase load flow modeling and computation method based on electromagnetic transient model library are studied in this paper, and three-phase load flow program is implemented in ADPSS. The electromagnetic transient models are classified first. Then influence of transformer connection on system phase angle is studied, and a new transformer model compatible with various transformer connections is built. Based on research conclusion of various three-phase power flow algorithms, Newton-Raphson method is used on account of prospect and practicability, and three special node types are set up to meet asymmetric computation requirements. Finally, correctness of the new program is validated with the first two examples, and the other examples are given to demonstrate usability of the new power flow results to provide initial values for electromagnetic transient simulation.