In long transmission lines, the charging current caused by the shunt capacitance decreases the accuracy in impedance based fault location. To improve the accuracy of fault location, this paper presents a novel scheme, where two Digital Fault Recorders (DFRs) are installed in a line. They can send the transient data of the faults to the both ends of a line. To estimate the distance of a fault, i...

We report on the realization of a superinductor, a dissipationless element whose microwave impedance greatly exceeds the resistance quantum R(Q). The design of the superinductor, implemented as a ladder of nanoscale Josephson junctions, enables tuning of the inductance and its nonlinearity by a weak magnetic field. The Rabi decay time of the superinductor-based qubit exceeds 1 μs. The high kine...

This paper summarizes the electromagnetic time reversal (EMTR) technique for fault location, and further numerically validates its effectiveness when impedance is negligible. In addition, a specific EMTR model considering derived, correctness of derivation verified by various calculation methods. Based on this, we found that large, existing methods might fail to accurately locate fault. We prop...

Low fault currents, associated with Vegetation High Impedance Fault (VeHIF) events, are often challenging to clear by relying on traditional overcurrent based protection schemes. Frequency (LF) harmonics have readily been used in the literature as potential detection features. (HF) signatures also generated during VeHIFs events. These generally underrepresented, potentially for reducing computa...

The STATCOM (Synchronous Static Compensator) based on voltage source converter (VSC) is used for voltage regulation in transmission and distribution systems. The STATCOM can rapidly supply dynamic VARs required during system faults for voltage support. The apparent impedance is influenced by the reactive power injected or absorbed by the STATCOM, which will result in the under reaching or over ...

For better solving the problem of multi-terminal fault location in the distribution network, this paper proposes a new fault location method based on Strong Tracking Filter (STF) and Parameter Adaptive Differential Evolution Algorithm (PADEA), which can be applied to asynchronous sampling systems. STF is adopted for real-time fundamental wave amplitudes’ extraction of voltage and current. STF ...

The results of field tests have shown, that the behaviour of the restriking earthfault in a cable is completely different in isolated and well-tuned compensated networks. In this paper, the differences will be considered in detail and the impact on the earthfault detection and the control of the Petersen-Coil will be explained. Due to the different behaviour, there are new possibilities to redu...