On the use of electromagnetic time reversal to locate faults in series-compensated transmission lines

Abstract

Abstract-The paper focuses on the extension to seriescompensated multiconductor transmission lines of a new fault location method based on the Electromagnetic Time Reversal (EMTR) theory. The applicability of the EMTR theory to locate faults is first summarized. Then, the paper describes the proposed algorithm to locate faults in multiconductor transmission lines using a single observation point at one of the line terminals. The application of the proposed method to seriescompensated transmission lines is finally illustrated by numerical simulations obtained using the EMTP-RV simulation environment where electromagnetic fault-transients are reproduced with reference to a realistic series-compensated overhead transmission line. The resulting fault location accuracy is quantified and analyzed with reference to different fault types.

Fault location in multi-terminal HVDC networks based on Electromagnetic Time Reversal with limited time reversal window

“…Concerning the fault impedance, as it has been discussed in [16,17], it does not affect the fault location accuracy. Thus, a fixed a-priori fault resistance value has been considered.…”

“…Moreover, in [16,17], the time reversal window has been chosen long enough so that the recorded transient signal s(x,t) is damped out. In order to relax this assumption, this paper examines the applicability of the EMTR technique with the limited time reversal window for the fault location problem in MTDC networks.…”

“…LIMITED TIME REVERSAL WINDOW An EMTR-based fault location technique has been successfully applied for locating faults in inhomogeneous networks, radial distribution networks [16] and seriescompensated transmission lines [17]. In these cases, it has been assumed that the fault location system operates after the protection relays maneuver and the time delay of the protection system and the breakers opening time is long enough so that the recorded transient signals are damped out.…”

“…In order to provide a solution to this problem, this paper presents a procedure based on the theory of Time-Reversal Process [8][9][10][11][12][13][14][15] applied to traveling waves in transmission lines [16,17] using measurements at one terminal only.…”

“…The applicability of the EMTR technique to locate faults in transmission lines was recently presented in [16,17]. It was shown that, when electromagnetic transients observed in specific observation points are time-reversed and back-injected into the system, or in a simulated version of it, they would converge to the source (fault) location.…”