A Novel Two-step Distance Protection for Flexible HVDC Transmission Lines

Distance Protection of Hvdc Transmission Line with Novel Fault Location Technique

This paper presents a novel method for locating faults using setting point voltage and current data. The line model used is based on the frequency dependent parameter model and it is distributed in to two parts: Distributed Parameter model and Compensation matrix. Finite Impulse Response filters are used to fit the Compensation matrix. So by using local Sampling data, voltage and current at the...

Effects of CT and VT Connection Point on Distance Protection of Transmission Lines with FACTS Devices

This paper presents the effects of instrument transformers connection points on the measured impedance by distance relays in the presence of Flexible Alternating Current Transmission System (FACTS) devices with series connected branch. Distance relay tripping characteristic itself depends on the power system structural conditions, pre-fault operational conditions, and especially the ground ...

Pole-to-Ground Fault Analysis and Fast Protection Scheme for HVDC Based on Overhead Transmission Lines

Flexible direct current (DC) transmission network technology is an effective method for large capacity clean energy access to power grids, but the DC short-circuit fault detection for it is a difficult problem. In this paper, the pole-to-ground fault transient characteristics in a multi-terminal DC power grid, based on overhead transmission lines and DC circuit breakers, are analyzed firstly. T...

Design and selection criteria for HVDC overhead transmission lines insulators

Research of Bipolar HVDC Transmission Lines based on Traveling Wave Differential Protection

The principle of the traveling wave based differential protection for bipolar HVDC transmission lines is proposed in the paper. Unlike the traditional current differential protection, the quantity of current is replaced by the quantity of the traveling wave for comparison. The traveling wave at the remote end is transferred to the local end for comparison to the local traveling wave. For the bi...