基于VSC的多端直流系统故障定位方法研究

项目名称： 基于VSC的多端直流系统故障定位方法研究

项目编号： No.51507008

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 电工技术

项目作者： 罗国敏

作者单位： 北京交通大学

项目金额： 20万元

中文摘要： 随着新能源的广泛应用和电力电子技术的飞速发展，基于VSC的多端直流输配电技术凭借其能量损失少、接入性好等优势，已成为未来智能电网中不可缺少的重要部分。多端直流系统网络结构的日渐复杂带来了诸如直流系统内部故障定位困难等方面的问题，而利用多端直流系统端口处暂态信息进行故障定位方面的研究较为匮乏。本项目围绕多端直流系统网络结构简化和等效、故障和干扰暂态信号时频特征提取等关键问题，在系统性研究多端直流系统网络拓扑结构、内部故障机理、暂态故障信号的传播和波形特性等主要因素的基础上，研究多端直流系统行波定位法、基于参数计算的多端系统故障定位法、以及故障暂态信号识别和去噪算法，建立多端直流系统故障定位算法体系，从而丰富多端直流系统故障隔离和系统恢复的手段。本项目立足社会经济发展中的重大问题，研究结果有望为大规模直流输配电网络的应用提供技术支撑，具有较强的理论价值和应用前景。

中文关键词： 多端直流系统；故障定位；暂态信号分析；扰动识别

英文摘要： With the development of renewable energy and electronic techniques, the VSC-based multi-terminal DC power networks, which cause less energy loss and easier network connection, have become more and more important in the research of smart grid. The complicated connections of multi-terminal DC networks produce some technical problems such as location of the DC faults. However, the research on the fault location with the terminal information of DC networks was rarely reported. This project aims to solve some critical issues of fault location in multi-terminal DC networks such as the simplification of DC network topology, the characterization of transient signals, and so on. Based on the analysis of DC network topology, DC faults and characteristics of transient fault signals, three algorithms: travelling wave based fault location, parameter calculation based fault location, and fault transient signal de-noising will be proposed. Finally, a fault location system of multi-terminal DC networks will be setup. Such system can help improving the techniques of fault isolation and system recovery of multi-terminal DC networks. The research of this project is helpful to the social development of Chinese smart grid and the industrial application of large-scale DC power transmission and distribution.

英文关键词： Multi-terminal DC networks;Fault location;Transient signal analysis;Disturbance recognition