Min Byong Wook

Bio: Min Byong Wook is an academic researcher from Korea Electric Power Corporation. The author has contributed to research in topics: Electric power transmission & Ampacity. The author has an hindex of 1, co-authored 1 publications receiving 9 citations.

Line-rating system boosts economical energy transfer

Abstract: The authors describe how the Korea Electric Power Corporation (KEPCO) has successfully completed twenty-four overhead transmission line upgrade projects in Korea from 1994 to 1997 for a total cost of US$54.6 million. Upgrades to existing transmission lines were accomplished by replacing existing conductors with high ampacity conductors using existing towers and rights-of-way. Transmission line capacity is doubled with these high-capacity conductors. Planning studies and construction of the upgrade projects were facilitated by using LINEAMPS transmission line ampacity software.

Dynamic thermal rating of transmission lines: A review

Abstract: Electrical load growth and the addition of renewable energy generation occur at a rate that can outpace transmission development. As a consequence, transmission lines may become constrained. To accommodate load growth or distributed generation connections, one option is to operate existing transmission facilities up to their actual physical capacity rather than a conservative estimate of line capacity. Dynamic thermal rating of transmission lines provides actual current-carrying capacity of overhead lines based on real-time operating conditions. Dynamic Thermal Line Rating (DTLR) approaches vary significantly from one study to another in implementation, objectives and outcomes. Existing literature has presented several methodologies for DTLR adoption. This paper provides a comprehensive study of the literature on DTLR. It presents a survey and evaluation of various DTLR technologies, DTLR equipment, challenges with DTLR deployment, real world applications, and future approaches to DTLR implementation. The presented work is organized to allow a reader to understand and compare various DTLR approaches.

Review of dynamic line rating systems for wind power integration

Abstract: When a wind power system is connected to a network point there is a limit of power generation based on the characteristics of the network and the loads connected to it. Traditionally, transmission line limits are estimated conservatively assuming unfavourable weather conditions (high ambient temperature, full sun and low wind speed). However, the transmission capacity of an overhead line increases when wind speed is high, due to the cooling caused by wind in the distribution lines. Dynamic line rating (DLR) systems allow monitoring real weather conditions and calculating the real capacity of lines. Thus, when planning wind power integration, if dynamic line limits are considered instead of the conservative and static limits, estimated capacity increases. This article reviews all technologies developed for real-time monitoring during the last 30 years, as well as some case studies around the world, and brings out the benefits and technical limitations of employing dynamic line rating on overhead lines. Further, the use of these DLR systems in wind integration is reviewed.

Prospects of Using the Dynamic Thermal Rating System for Reliable Electrical Networks: A Review

Abstract: Traditional transmission line ratings are limited by a set of fixed conservative weather assumptions that are also known as static thermal rating (STR). Owing to STR, new line corridors are continuously required to address increasing electricity demands while minimizing the curtailment of renewable energy sources (RES). However, the expansion of an electricity network is expansive, long, and limited due to the scarcity in land and space. To overcome this issue, researchers have proposed a dynamic thermal rating (DTR) system that can increase the capacity of existing transmission lines. Research has shown that actual line ratings are higher than STR most of the time. The potential of using the DTR system to increase the reliability of power systems is therefore significant. Almost every country has begun the process of increasing the integration of RES, and consequently, the DTR system has become increasingly important. Exploring and reviewing critical studies on the DTR system are thus beneficial for researchers who are interested in the developments of DTR technology. This review paper begins by comparing the two main DTR system standards. Then, monitoring technologies of the DTR system are reviewed. Notable research on the reliability impacts of the DTR system on electrical networks are surveyed. Interactions with wind power and other smart grid technologies are also examined, and the concept of power system reliability is briefly discussed.

Dynamic rating of transmission lines-a New Zealand experience

Abstract: This paper presents a real world application of dynamic line rating (DLR) by the line-tension monitoring method. There are several methods to rate transmission lines in real-time of which the tension-monitoring method has demonstrated more advantages. Transpower, the transmission company of New Zealand, has investigated the application of DLR on two of its circuits. The experiment has been set up using the hardware and software provided by Valley Group, USA, and some interesting experiences are documented in this paper. The analysis of the results provided by the experiment demonstrated the real capabilities of Transpower's transmission lines, which are also discussed in this paper. It is concluded that dynamic line rating can contribute towards efficient control of transmission lines.