Broadband Transmission Characteristics of Overhead High-Voltage Power Line Communication Channels

Abstract

Abstract-This paper considers broadband signal transmission via high-voltage/broadband over power lines (HV/BPL) channels associated with overhead power transmission. To determine the end-to-end channel characteristics of various overhead HV/BPL multiconductor transmission line (MTL) configurations, the chain scattering matrix or T -Matrix (TM) method is adopted.The overhead HV/BPL transmission channel is investigated with regard to its spectral behavior, its end-to-end signal attenuation, and phase response. It is found that the above features depend critically on the frequency, the coupling scheme applied, the physical properties of the cables used, the MTL configuration, and the type of branches existing along the end-to-end BPL signal propagation. Unlike the older models that underestimate the broadband transmission potential of overhead HV lines significantly, the results demonstrate that the overhead HV grid is a potentially excellent communications medium, offering low loss characteristics over a 100 km repeater span well beyond 100 MHz and guarantees the imminent coexistence of lowvoltage (LV), medium-voltage (MV), and HV BPL systems towards a unified transmission/distribution smart grid (SG) power grid.

Smart Energy and Spectral Efficiency (SE) of Distribution Broadband over Power Lines (BPL) Networks – Part 2: L1PMA, L2WPMA and L2CXCV for SE against Measurement Differences in Overhead Medium-Voltage BPL Networks

“…Arbitrarily, the WtG 1 coupling scheme is applied during the following simulations. As it is usually done [5], [11], [13], [44], the selection of representative coupling schemes is a typical procedure for the sake of reducing manuscript size.…”

Review and Progress towards the Common Broadband Management of High-Voltage Transmission Grids: Model Expansion and Comparative Modal Analysis

“…Based on [3,36,42,43], in this paper, a top-down approach is proposed to determine the end-to-end attenuation of overhead HV/BPL channels based on an exact version of multidimensional chain scattering matrix or T-Matrix method. This novel extended chain scattering matrix or TMatrix (TM2) method, which is already well verified in the case of overhead and underground LV/BPL and MV/BPL distribution power grids [3], combines the accuracy of the generic multidimensional network analysis tool presented in [3,36,42,43] and the simplicity of hybrid model of [1][2][3][21][22][23][24][25]. Based on numerical results concerning various simulated overhead HV/BPL topologies, BPL transmission via the overhead transmission power grid is investigated aiming at clarifying the influence of factors, such as the overhead HV power grid type (150 kV, 275 kV, or 400 kV and single or double circuit), the physical properties of the cables used, the MTL configuration, the end-to-end distance, and the number, the length, the terminations, and the multiplicity of the branches encountered along the endto-end BPL signal propagation.…”

“…Due to ubiquitous nature of the transmission and distribution power grids, the structure of these grids-that is, low-voltage (LV), medium-voltage (MV), and high-voltage (HV) grids-is the key to developing an IP-based power system, offering a plethora of potential smart grid (SG) applications [1][2][3][4][5]. In the meanwhile, the deployment of broadband over power lines (BPL) networks through the entire transmission and distribution grid forms a potentially convenient and inexpensive communications medium for delivering broadband last mile access in remote and/or underdeveloped areas [6][7][8].…”

“…As usually done in BPL transmission, a hybrid model is employed to examine the behavior of BPL transmission channels installed on BPL multiconductor transmission line (MTL) structures [1,2,[21][22][23][24][25][36][37][38][39][40][41]. Through a bottom-up approach consisting of an appropriate combination of the similarity transformation and MTL theory, the modes that may be supported by an overhead HV/BPL configuration are determined concerning their propagation constants and their characteristic impedances [1-3, 21-25, 35-47].…”

“…Since the overhead power grid was not originally designed to serve the purpose of a transmission medium for communication signals, the overhead transmission power grids are subjected to attenuation, multipath due to various reflections, noise, and electromagnetic interference [1][2][3][21][22][23][24][25][26][27][28][29][30][31]. Each of the aforementioned adverse factors affects critically the overall performance and the design of BPL systems [32][33][34][35].…”