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 setting point are calculated accurately. Then, the line model equations are solved in time domain to calculate the fault distance. The proposed method is able to enhance the accuracy of the measurement of fault at far end. Simulation results have shown the effectiveness of proposed method and is capable of locating the faults occurring on HVDC Transmission lines accurately and quickly. Key Words: fault distance, frequency dependent parameter, distributed parameter model, HVDC transmission line