The protection of meshed HVDC grids requires the fast identification faults affecting transmission lines. Communication-based methods are thus not suited due to delays. Many approaches involving a model transient behavior faulty line have recently been proposed. Nevertheless, an accurate description traveling wave phenomenon in multi-conductor lines such as overhead complex computations ill-sui...

The penetration of power electronic based equipment in the grid has increased co-occurrence electromechanical and electromagnetic transients. Significant research efforts have been focused last decade to study these interactions. Frequency dependent transmission line models are indispensable understand such This paper describes a systematic procedure for development an experimental scaled-down ...

This paper presents an equivalent circuit model based on piecewise linear parallel branches (PLPB) to study solar cell modules which are partially shaded. The PLPB model can easily be used in circuit simulation software such as the ElectroMagnetic Transients Program (EMTP). This PLPB model allows the user to simulate several different configurations of solar cells, the influence of partial shad...

A triggered-lightning experiment and EMTP modeling of that experiment are used to study the responses of a twoconductor overhead power line to a direct lightning strike. The experiment was conducted at the International Center for Lightning Research and Testing (ICLRT) at Camp Blanding, FL. The lightning was artificially initiated (triggered) from a natural thundercloud using the rocket-and-wir...

The Electromagnetic transients progr am and its variants all use the “trapezoidal rule” numerical integration method. The trapezoidal rule is a second order numerical integration technique that is simple to implement. However, it is also susceptible to numerical oscillations when differentiat ing step changes in voltage and current. The program user should be aware of the potential for these os...

In this paper, we present an exact (i.e., non-approximated) and linear measurement model for hybrid AC/DC micro-grids recursive state estimation (SE). More specifically, of a voltage source converter (VSC) is proposed. It relies on the complex VSC modulation index to relate quantities at converters DC side phasors AC side. The derived from transformer-like representation accounts conduction swi...

this paper illustrates the application of s-transform and continuous wavelet transform (cwt) for fault location in combined overhead line and cable distribution networks. the high frequency transient signals originated by faults are analyzed using s-transform and cwt. the s-transform is found to be applicable in transient based fault location in distribution networks. this technique is an expan...