Abstract
This paper discusses a novel fault location approach using single ended measurement. The natural dissipation of the circuit parameters are considered for fault location. A relationship between the damped natural frequency of oscillation of the transmission line current and fault location is established in this paper. The hybrid dc circuit breaker (dcCB) interrupts the fault current and the line current attenuates under the absence of any driving voltage source. The line capacitance discharges into the fault at a specific frequency of oscillation and rate of attenuation. Utilizing this information, the fault location in a multi-terminal direct current (MTdc) network can be predicted. A three terminal radial model of a MTdc is used for performance evaluation of the proposed method using Power System Computer Aided Design (PSCAD)/Electromagnetic Transients including dc (EMTdc).
Highlights
The electric grid is undergoing a technological transformation as a result of increasing environmental awareness to reduce carbon emissions
SIMULATION RESULTS To verify the accuracy of the proposed algorithm the radial multi-terminal direct current (MTdc) network shown in Figure 2 was designed in Power System Computer Aided Design (PSCAD)/Electromagnetic Transients including dc (EMTdc)
To accurately locate faults in a MTdc network, a method using the natural discharge of the transmission line current has been proposed
Summary
The electric grid is undergoing a technological transformation as a result of increasing environmental awareness to reduce carbon emissions. Where the generation source is located at a distance far away from load centers, the High Voltage direct current (HVdc) transmission technology has taken prominence over High Voltage alternating current (HVac) transmission [1]. Lower power losses and flexible control have made HVdc a popular choice [2]. Such advantages can be achieved through the implementation of Voltage Source Converter (VSC) HVdc networks [3]. The modular multi-level converter (MMC) has emerged as a popular choice for VSC-HVdc systems, due to certain salient features including (1) the absence of large dc link
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