A simple approach of partial discharge source location in high voltage cables

Abstract

This article presents a new approach of partial discharges (PD) source location in power cables. The main advantage of this approach is the detection of the propagation direction of the PD. The method provides a pattern named by the authors PD+D, which, in contrast to the well–known phase-resolved partial discharge (PRPD) pattern, graphically shows the direction of PD propagation and uses the polarity of a sensor array on top of the magnitudes of the positive and negative parts of each PD pulse to detect the direction of propagation, is described in detail. The proposed technique is useful for the evaluation and diagnosis of power cables, since it can identify incipient faults. The attained results that demonstrate the value of this methodology and their scope and limitations are discussed.

Research on High Harmonic Amplification of 10kV Series Static Var Generator

“…The extensive application of cable in urban power grids also brings some problems. For example, due to its high capacitance effect on the ground compared to overhead lines, a big value of capacitive reactive charging power will be generated under the action of alternating current [2]. In the light load mode, the charging power of the cable tends to become too large, leading to a severe phenomenon of capacitive reactive power feeding, causing voltage increase or even voltage violation, which threatens the safety, stability, and economic operation of the power grid.…”