Fault current control methods for multi-terminal DC systems based on fault blocking converters

The Journal of Engineering

Philipp Ruffing¹ 

[1] Institute for High Voltage Technology, RWTH Aachen University , Schinkelstr. 2 , 52056 Aachen , Germany

关键词: faulty line segments;    fast separation;    multiterminal HVDC cable system;    converter model;    full-bridge converters;    separation time;    full-bridge-based converters;    different control methods;    essential aspect;    multiterminal DC systems;    high-voltage direct current offshore grids;    selective DC-side;    fault current control schemes;    high-speed switches;    future transmission systems;    line current control method;    multiterminal HVDC systems;    European electricity grid;    st;    ard fault control methods;    fault current control methods;    selective separation;   

DOI  :  10.1049/joe.2018.0228

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

Within the framework of modernisation of the European electricity grid, multi-terminal high-voltage direct current (HVDC) offshore grids shall be integrated into future transmission systems. An essential aspect of multi-terminal HVDC systems is fast and selective DC-side fault handling and the separation of faulty lines. This study investigates the applicability of different control methods relying on full-bridge-based converters in combination with high-speed switches for a fast and selective separation of faulty line segments in a multi-terminal HVDC cable system in a symmetrical monopole configuration. It is shown that the proposed line current control method can significantly reduce the separation time of a faulty line compared with standard fault control methods. The analysis is based on simulations in PSCAD|EMTDC™ with a converter model based on the CIGRÉ WG B4.57, which is enhanced for the use of full-bridge converters with fault current control schemes.

【 授权许可】

CC BY