含VSC-HVDC交直流系统多尺度暂态建模与仿真研究

发布时间：2018-03-15 02:28

本文选题：柔性直流输电　切入点：多尺度暂态模型　出处：《中国电机工程学报》2017年07期 　论文类型：期刊论文

【摘要】：为满足对交直流系统电磁机电暂态特性准确、快速和灵活仿真的需要,提出基于移频分析等方法的含柔性高压直流(voltage source converter-based high voltage directcurrent,VSC-HVDC)输电交直流电力系统多尺度暂态模型。移频分析法采用希尔伯特变换,通过移除或保留交流信号基频载波实现慢快变化暂态的模拟。该文建立了VSC移频相量模型,推导出VSC移频域与其控制系统dq域的转换关系,选择性插入?模型获得直流输电线多尺度暂态模型,进而构建了全系统多尺度暂态模型。该模型通过设置仿真参数(如时间步长)能够满足不同时间、不同电网位置电磁或机电暂态仿真的需求。仿真结果表明,所提模型不仅准确描述了VSC-HVDC多尺度暂态过程,节省了计算时间,而且增强了交直流系统电磁机电暂态混合仿真的灵活性。
[Abstract]:In order to meet the need of accurate, fast and flexible simulation for electromagnetic transient characteristics of AC / DC system, A multi-scale transient model of AC / DC power system with flexible HVDC voltage source converter-based high voltage directcurrentVSC-HVDCbased on frequency shift analysis is proposed. Hilbert transform is used in the frequency shift analysis. The transient simulation of slow and fast change is realized by removing or retaining the fundamental frequency carrier of AC signal. In this paper, the VSC frequency shift phasor model is established, and the conversion relationship between VSC frequency shift domain and its control system dq domain is deduced, and the selective insertion? The multi-scale transient model of DC transmission line is obtained and the multi-scale transient model of the whole system is constructed. The model can satisfy different time by setting simulation parameters (such as time step). The simulation results show that the proposed model not only accurately describes the multi-scale transient process of VSC-HVDC, but also saves calculation time. Moreover, the flexibility of electromechanical transient hybrid simulation of AC / DC system is enhanced.
【作者单位】：中国科学院电工研究所;全球能源互联网研究院;
【基金】：国家电网公司“千人计划”科技专项(SGRIzlsdgcjsyjs JS[2014]264)~~
【分类号】：TM721.1;TM743

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