Extra-high Voltage Cables

XLPE Insulation Cables

The basic material for XLPE is polyethylene, which is chemically transformed to cross-linked polyethylene (XLPE) through the cross-link reaction of organic peroxides. The cross-link method for polyethylene was developed in the United States during the 1950’s and has since been continuously developed for application to higher voltages. Higher voltages are increasingly being required, and the 500kV XLPE cables have already been commercialized.

OF Cables

OF cables were developed in the early 1900s as a result of increased demand for cables, and have been widely used due to their high credibility and economic efficiency. OF cables mainly consist of a single or 3-plex structure, and are used for large storage transmission up to ultra-high voltage from 66kV to 765kV. They are widely used in extra-high voltage cables.

Superconducting Cables

Superconductive cables are the eco-friendly, next-generation transmission system that enables large storage of electricity to be transmitted with high efficiency using lower voltages compared to high-voltage underground cables. They have high market potential and knock-on effects that could present a new paradigm for present-day electrical systems. Furthermore, when the joist technology for superconductive cables is fully developed, current substations can be converted to small-size switching stations and fewer new substations will need to be built. And in the future, superconductive cables may replace extra-high voltage large storage overhead conductors as well. Such benefits will contribute to greater social acceptance and enhanced convenience to citizens by helping resolve the NIMBY attitude toward unpleasant facilities. Furthermore, it will contribute significantly to the power grid business, which will be one of the core competitive technologies among nations in the future. Products in the superconductive cable system include superconductive cables, middle and terminal connection boxes, cooling systems to keep the superconductive cables at an extra-low temperature of -200 degrees, and control systems. Liquid nitrogen is used as the refrigerant.

Partial Discharge Monitoring System

The partial discharge monitoring system aims at preventing electrical accidents through identifying insulator faults in advance. The partial discharge monitoring system consists of the detection sensor that detects partial discharge signals due to insulator faults, the analyzer for analyzing the signals, and display for displaying the analyzed data.
The partial discharge monitoring system consists of a mobile monitoring system for regular/inspection audits, and a fixed/regular online monitoring system for real-time monitoring.

R-TAS®(Real-Time Ampacity System)

R-TASⓡ, or Real-Time Ampacity System collects real-time data on temperature and load of the power cables. It calculates the effect of surrounding medium and converts it into transmissible energy. Real-time/quantitative data is provided on short-term/long-term current load to the power system operator.
R-TASⓡ provides measurable, controllable state variables for the cable system (conductor temperature, allowable current, routing environment variables, etc.) to enhance the efficiency of the transmission system, and automatic real-time auditing to prevent accidents and distinguish the stability of the cables.