A Traveling-Wave-Based Fault Location Scheme for MMC-Based Multi-Terminal DC Grids
A Traveling-Wave-Based Fault Location Scheme for MMC-Based Multi-Terminal DC Grids
复制标题
基于MMC的多端直流电网行波故障测距方案
作者：
张烁;邹贵彬;黄强;高厚磊
提出了一种基于模块化多电平换流器（MMC）的多端直流（MTDC）系统中直流线路故障定位的新方法。该方案基于行波原理，考虑到系统的低惯量特性和网状拓扑结构，分为故障极点识别、故障区段确定和故障距离计算三个步骤。该方法通过对换流站进行时间同步测量，获得准确的初至电流行波（FACTW）幅值、极性和到达时间，从而能够准确地确定故障极、故障段和精确的故障位置。连续小波变换（CWT）的部署，以提取所需的特征的输入信号在直流线路。由于该方案只需要FACTW的特征，避免了后续行波检测的实际困难。在PSCAD/EMTDC软件中建立了一个基于MMC的四端高压直流输电系统，以评估故障定位方案的性能。不同情况下的仿真结果表明，所提出的故障定位方案具有较高的准确性、良好的适应性和可靠性。此外，该算法可以用于MMC-MTDC网格与任何数量的网格。
This paper presents a novel fault location scheme of DC line in modular multilevel converter (MMC)-based multi-terminal DC (MTDC) grids. Considering the low-inertia characteristics and the meshed topology, the scheme, based on traveling-wave principle, is divided into three steps, namely, faulty pole identification, faulty segment determination and fault-distance calculation. With accurate amplitude, polarities and arrival times of the first arrival current traveling waves (FACTWs) collected from time-synchronized measurements taken just at the converter stations, the proposed scheme can correctly determine the faulty pole, the faulty segment and the precise fault location. The continuous wavelet transform (CWT) is deployed to extract the required features of the input signals at the DC lines. Since the scheme merely needs the features of FACTWs, the practical difficulties of detecting subsequent traveling waves are avoided. A four-terminal MMC-based high voltage direct current (HVDC) grid was built in PSCAD/EMTDC software to evaluate the performance of the fault-location scheme. Simulation results for different cases demonstrate that the proposed fault-location scheme has high accuracy, good adaptability and reliability. Furthermore, the algorithm can be used for a MMC-MTDC grid with any number of meshes.
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影响因子：
4.4
作者：
Shenglan Song;G. Zou
通讯作者：
Shenglan Song;G. Zou
影响因子：
4.4
作者：
Yuan Liao;N. Kang
通讯作者：
Yuan Liao;N. Kang
DOI：
10.1109/tpas.1985.319015
发表时间：
1985-09
期刊：
IEEE Transactions on Power Apparatus and Systems
影响因子：
--
作者：
W. Long;J. Reeve;J. McNichol;R. E. Harrison;D. E. Fletcher;J. Bowles
通讯作者：
W. Long;J. Reeve;J. McNichol;R. E. Harrison;D. E. Fletcher;J. Bowles
影响因子：
4.4
作者：
F. Lopes;K. Dantas;K. Silva;F. Costa
通讯作者：
F. Lopes;K. Dantas;K. Silva;F. Costa
高压直流线路中基于固有频率的线路故障定位
影响因子：
4.4
作者：
He, Zheng-You;Liao, Kai;Mai, Rui-Kun
通讯作者：
Mai, Rui-Kun