基于励磁与调速控制的单机无穷大系统场-路-网时步有限元建模

发布时间：2018-01-19 05:13

本文关键词： 单机无穷大系统控制系统场-路-网耦合时步有限元　出处：《电工技术学报》2017年03期 　论文类型：期刊论文

【摘要】：为了能更准确地分析在整个电力系统受到干扰或出现故障时发电机与电网相互影响的动态问题,建立含有励磁调节系统和转速控制系统的场-路-网耦合时步有限元模型。该模型不但考虑了发电机磁场饱和、畸变以及趋肤效应等非线性因素对电机的影响,同时还考虑了转速的动态变化以及变压器和输电系统参数的影响,并给出了励磁调节系统和转速控制系统的实现方法。为验证模型的正确性,以一台1 407 MV·A汽轮发电机为例,采用该模型对发电机额定并网运行情况下,变压器二次侧(高压侧)A相断路器突然断开这一非全相暂态过程进行了仿真,并与传统的Park方程计算结果进行对比分析,验证了建立的场-路-网耦合时步有限元模型的正确性。
[Abstract]:In order to more accurately analyze the dynamic problem of the interaction between generator and power network when the whole power system is disturbed or malfunction. A coupling time-step finite element model with excitation regulation system and rotating speed control system is established, which not only considers the effect of nonlinear factors such as magnetic field saturation, distortion and skin effect on the motor, but also takes into account the influence of nonlinear factors such as magnetic field saturation, distortion and skin effect on the motor. At the same time, the dynamic change of rotational speed and the influence of transformer and transmission system parameters are also considered, and the realization method of excitation regulation system and speed control system is given to verify the correctness of the model. Taking a 1 407 MV 路A turbogenerator as an example, the model is used for the rated grid connection of the generator. The transient process of transformer secondary side (high voltage side phase A circuit breaker) is simulated and compared with the traditional Park equation. The correctness of the field-road-network coupled time-step finite element model is verified.
【作者单位】：哈尔滨理工大学电气与电子工程学院;许继电气股份有限公司;
【基金】：国家自然科学基金项目(51407050) 国家重大科技专项(2009ZX06004-013-04-01)资助
【分类号】：TM743
【正文快照】： 0引言在电力系统单机容量不断增加的同时,电网结构也变得更加复杂化,从而导致系统动态问题日益突出,针对电力系统暂态问题的研究日益增多[1-4],如何准确仿真计算机网动态过程显得尤为重要,建立高精度机网仿真模型成为人们最为关心的问题之一。早期在电网动态系统的仿真计算中,

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