Frequency-domain transient analysis in double-circuit mixed HV overhead line-cable connection including cross-bonding

Abstract

Summary In extra/high‐voltage power systems, electromagnetic transient phenomena (e.g. from switching events) are analysed by time‐domain simulation based on Electromagnetic Transient Program‐type simulation tools. For the particular combined power cable–overhead line studied in this paper, it can be time‐consuming especially if the effect of design parameters are studied systematically. A tailored solution based on solving the system's impedance and admittance matrix in frequency domain can serve as alternative approach. It also allows for including design details, which can be hard to implement in Electromagnetic Transient Program‐type simulation tools designed for general application. The method is applied to analyse transient behaviour (upon no‐load energising and no‐load switching surge response) of a mixed double circuit connection including a section with essentially four parallel cables per phase, regularly cross‐bonded over a length of 10.8 km. It is validated by comparison with pscad/emtdc simulation. Copyright © 2015 John Wiley & Sons, Ltd.

Transient modeling and sensitivity analysis of cable system parameters

“…However, for this analysis the model adopted comprises of four equivalent layers; core conductor, XLPE insulation, screen and outer sheath. The detailed configuration and parameters of the OHLs and cable as well as the derivation of the equivalent layers can be found in [1], [2] and [5]. The cable design parameters are also shortly described below:…”

“…The 28 different cable segments are grouped into 12 minor sections, while three successive minor sections form one major section of approximately 2.7 km lenght. Within one major section, the minor sections are connected via cross-bonding joints, while the major sections are connected via a straight through joint [1], [2]. This is the actual cable configuration and the model is referred to as "detailed".…”

Y-Parameters Model of Cross-Bonded Cables Including Bonding Wire Impedances

“…Cross-bonded cables may be analyzed in the frequencyor time-domain, where different model formulations exist. In the frequency domain, a model for cross-bonded cable system has been formulated using ABCD-parameters in [5], [6] or Y-parameters in [7]. According to [4], ABCD-parameter methods are suitable for low-frequency steady-state analysis, whereas Y-parameters are considered to be more suitable for transient and high-frequency studies.…”

Frequency-Dependent Multiconductor Transmission Line Model With Collocated Voltage and Current Propagation

“…1 illustrates a number of points in a time window of width T c and its corresponding frequency window of width f c . As will be discussed in Section 3.2.1, the width of the time window will be chosen based on the time constants of the circuit ([123],[140]). The width of the frequency window will be chosen based on the maximum frequency that we want to simulate in the transient[28].…”