Study on Protection Scheme of VSC-HVDC Outgoing Line from Wind Farms

With the wide application of wind farms VSC-HVDC, the protection of its transmission lines is also become a popular research topic. Through the analysis of the fault characteristics of the outgoing line of the wind farms VSC-HVDC, the fault characteristics of the single-pole grounding fault, the bipolar short-circuit fault and the AC side fault of the sending-end converter of the DC transmission line are studied. According to the difference of the fault characteristics, the corresponding protection scheme is configured for the fault of the outgoing line, and then the PSCAD/EMTDC simulation platform is used to carry out the simulation verification of the fault. Through the comparison and analysis of the simulation results, the feasibility of the protection scheme is verified.

I. INTRODUCTION

In the present era, there is a growing scarcity of conventional fossil fuels, namely coal, oil, and natural gas. Consequently, wind energy has gained favor among nations due to its readily available resources and limitless advantages [1]. Wind power generating has evolved into a well-established kind of renewable energy generation through extensive research conducted by numerous countries. In recent years, the primary approach for wind power distribution has been the utilization of Voltage Source Converter based High Voltage Direct Current Transmission (VSC-HVDC) [2][4].