一种实用的电压源型换流器及直流电网机电暂态建模方法

发布时间：2018-03-08 23:18

本文选题：电压源换流器型高压直流输电　切入点：直流电网　出处：《电工技术学报》2017年10期 　论文类型：期刊论文

【摘要】：提出一种在大规模机电暂态仿真中建立电压源型换流器和直流电网模型的实用方法。阐述建立该模型的原则、各部分实现方法以及主要功能,并通过如下步骤实现所提方法。VSC换流器模型与机电暂态网络分别采用不同积分步长的模型接口;无源孤岛的频率控制方法;换相阻抗支路d、q轴电流解耦计算;考虑电磁特性的直流网络积分处理方法以及保证调节快速平稳的措施。给出完整的VSC换流器和直流电网解算流程。最后通过与PSCAD中搭建的MMC-HVDC电磁暂态模型对比等算例证明了所提方法的有效性。
[Abstract]:A practical method for establishing voltage source converter and DC network model in large-scale electromechanical transient simulation is presented. The principle, implementation methods and main functions of the model are described. The VSC converter model and the electromechanical transient network respectively adopt the model interface with different integral step sizes, the passive isolated island frequency control method, the commutation impedance branch dq-axis current decoupling calculation. The integral processing method of DC network considering electromagnetic characteristics and the measures to ensure the fast and stable regulation of DC network are given. The complete flow of VSC converter and DC network calculation is given. Finally, the comparison with the electromagnetic transient model of MMC-HVDC in PSCAD is given. An example is given to show the effectiveness of the proposed method.
【作者单位】：中国电力科学研究院;
【基金】：国家电网公司科技项目(电压源换流器与直流电网建模仿真与协调控制的基础理论)
【分类号】：TM743

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