Utility feedback after LLPD deployment published at CIRED 2021
28.10.2021CIRED 2021 is an opportunity to hear new research, ideas and initiatives, and interact with hundreds of key decision leaders in the electricity distribution field.
Our colleague Mr. Mohd Faris Ariffin, from Tenaga Nasional Berhad, participated in the 26th International Conference & Exhibition on Electricity Distribution, that was hosted virtually this year, with an article summarizing LLPD deployment feedback aggregated over several years.
This paper focuses on the use of a line lightning protection device (LLPD) for the improvement of 33kV line lightning performance in the TNB Distribution Network. This initiative is part of the TNB Distribution Network Modernization Initiative that seeks long term and efficient solutions for medium voltage overhead lines (MV OHL) lightning protection issues. MV OHL that cut across open areas, i.e. without any natural shielding, are subjected to frequent direct lightning strikes, based on local lightning data from the TNB Research Lightning Detection System Network (LDSN). The current lightning protection installed on MV OHL is the metal oxide varistors (MOV) Line Surge Arrester (LSA) Class II, as per the IEEE 1410 Guide for Improving the Lightning Performance of Electric Power OH Distribution Lines. However, the earthing system high resistance and the high soil resistivity values can affect the LSA service life. MOV LSA requires low earthing resistance so surge current can be discharged and dispersed effectively to ground.
It has been observed that a reduction of 95% transient interruption rate due to lightning has been achieved after the installation of 180 units of the LLPD on the MV OHL in 2016, where conventional MOV LSA is unable to do so in this high soil resistivity area and the high pole earthing resistance of this line.
TNB Distribution Network (TNB DN), through the Distribution Technical Committee, dated 30th October 2017, acknowledged and approved the R&D Project entitled “Implementation and Use of New Line Surge Arrester Technology for 33kV Overhead Line in TNB with Application in High Soil Resistivity Areas”, based on the major findings of the project and recommendations garnered. Eventually, TNB DN received 1500 units of LLPD starting in June 2020, for installation on various poles and mini towers in the TNB DN 33kV OHL system.
Website of the Conference https://www.cired2021.org/
FIPRES references of preventing fire hazards in electrical panels
We will demonstrate two cases of FIPRES - Fire Prevention and Overheating Control system preventing fire hazards in electrical panels.
FIPRES versus Infrared Thermography
Why is infrared thermography inspection limited for efficient prevention of electrical overheating and fires?
A leading global business insurance company, Allianz Global Corporate & Specialty (AGCS), has published an article listing FIPRES as a solution to the problem of electric contact connections overheating
A leading global business insurance company, Allianz Global Corporate & Specialty (AGCS), published an article about contact connections overheating problems, and existing technological limitations of infrared thermography inspections.
LLPD field trial at Oil & Gas sector of Indonesian power grid
The 3rd International Conference on High Voltage Engineering and Power Systems 2021 (ICHVEPS 2021) is the third biannual conference organized by the School of Electrical Engineering and Informatics, Institut Teknologi Bandung, Indonesia, as an international forum for exchange ideas, discussion, and dissemination of research results and technologies in the field of High Voltage Engineering and Power System.
Investigation of LLPD performance at high altitude
International Conference on Lightning Protection” (ICLP) and “International Symposium on Lightning Protection” (SIPDA) represent the majority of the world scientific and industrial community in the field of lightning. ICLP and SIPDA bring together delegates of a broad spectrum that includes scientists, advisers, entrepreneurs, and heads of industrial research programs. Since Lightning protection is a multi-million dollar industry, the ICLP-SIPDA conference is one of the most sought after events by scientists and inventors alike to bring novel ideas and inventions to the public. The ICLP and SIPDA scientific committees have decided to hold a joint virtual conference from 20th to 26th September
Overheating and Fire Hazards in Capacitor Banks
Overheating of capacitor banks is a common problem in reactive power control systems, and these systems are an essential part of electric distribution and transmission. It may occur due to inadequate ventilation, loose connections, bad design, or the overvoltage during lower demand period. Moreover, the capacitor lifetime depends directly on the operating temperature hence an overheating will lead to a faster aging.
Online Transformer Drying Solution
The issue: moisture is threatening the transformer
Interview with Henrik Nordborg (Nordborg Henrik)
