Analysis of Ice-Covering Characteristics of China Hunan Power Grid

Abstract

Ice-covering characteristics are often researched in transportation, communication, and electric power industry. China Hunan Power Grid can easily suffer from ice disaster because of its geographical and climate environment. In particular, in the 2008 ice disaster, icing on overhead transmission lines and facilities caused outage in some cities and counties with a total population of about 30 million people. The ice-covering characteristics of the China Hunan Power Grid were analyzed in this paper. The recorded icing and frost climate data were investigated and analyzed. The model of overhead power line icing was proposed.The ice accretion mechanism was thus revealed. The icing impact factors such as geographical situation, climate characteristics, freezing weather characteristics, microterrain, and elevation were also presented in detail. The necessary conditions for ice-covering formation and the glaze frost distribution of Hunan Province were obtained.

The Reusable Load Cell with Protection Applied for Online Monitoring of Overhead Transmission Lines Based on Fiber Bragg Grating

“…Heavy ice coating of high–voltage transmission lines may lead to conductor breakage and tower collapse causing electrical supply outages [ 1 , 2 ]. In particular, in the 2008 ice disaster in China, icing on overhead transmission lines and facilities caused outages in some cities and counties with a total population of about 30 million people [ 3 ]. Over the past decades, numerous theoretical icing models have been developed in order to create reliable tools for predicting the process features of ice [ 4 ].…”

Early warning system for spatiotemporal prediction of fault events in a power transmission system

“…(iii) The selection of the input environmental attributes is flexible so that all the available environmental attributes in the explored region can be employed. There are some methods based on the extensive expert knowledge for specific fault cause, such as [38] for ice cover, [16] for wind damage, and [39] for lightning incidence. The prediction performance by these methods is generally precise and reliable, but the applicable scope is restricted to the relevant fault cause.…”

Resilience Assessment and Its Enhancement in Tackling Adverse Impact of Ice Disasters for Power Transmission Systems

“…Extreme events [1][2][3], which are low-probability high-impact, may cause a significant damage to the operational resilience of a power system, leading to wide-area power outages. As a key element in the critical infrastructure of a modern society, a power system should be not only reliable during a typical power system outage, but also resilient to extreme events.…”

“…The effect of ice disasters is increasingly serious on transmission systems, such as the ice storm, which happened in January 1998, hit Eastern Canada and the Northeastern United States and caused 1.4 million households to be affected by power blackouts [4]. Another example is the 2008 ice disaster in Southern China that wreaked havoc on power grid equipment and interrupted power supplies in disaster areas, knocking out more than 36,000 transmission lines and affecting 27 million households [2]. These outages reveal that power systems are in dire need of practical solutions to withstand such infrequent, low-probability high-impact events [5].…”