Relay Protection Settings Verification for Transmission System from Renewable Energy Island to VSC-HVDC
摘要
VSC-HVDC technology is nowadays used in large scale renewable energy island connected to the existing power system. The AC line and other transmission devices between renewable and VSC-HVDC are very special in fault characteristic. The fault currents from both sides are controlled which causes the sensitivity of current differential protection drop a lot. This paper studies the relay protection settings verification of the specified system. Operation mode determination rules and verification index are proposed. Case study is presented. Suggestions are given finally.