Issues and Challenges for HVDC Extruded Cable Systems

The improved features of AC/DC converters, the need to enhance cross-country interconnections, the will to make massive remote renewable energy sources available, and the fear of populations about overhead lines have fostered HVDC cable transmission all over the world, leading in the last two decades to an exponential increase of commissioned HVDC cable projects, particularly of the extruded insulation type. Comprehensive surveys of the issues to be faced by HVDC extruded cable systems appeared in the literature some years ago, but they are not so up-to-date, as HVDC extruded cable technology is developing fast. Therefore, the contribution this paper aims at giving is a systematic, comprehensive and updated summary of the main present and future issues and challenges that HVDC cable systems have to face to further improve their performance and competitiveness, so as to meet the growing quest for clean and available energy worldwide. The topics covered in this review–treated in alphabetical order for the reader’s convenience–are accessories, higher voltage and power, laying environment (submarine and underground cables), modeling, multiterminal HVDC, operation and diagnostics, recyclable insulation, space charge behavior, testing, thermal stability, transient voltages.

Under Ground Cable Fault Detection & Maintenance Robot Based on ATMEGA 328P Micro-Controller

It tells that the problem which will occur during survey is as per the modernization. We are using underground cable getting fault and maintenance of such cables. Show our project AIMS for removing this for and solving this problems. We are trying to build underground robot which is having wireless camera, High voltage shielding. It will have some sensor to detect the environment, it is specially design type of robo, it is universal and it is semi-autonomous. Underground cables are mostly prepare for condensed area where high population is there. Then in that case this cable are underground may be power line cable for communication line as well as ducting are laid underground. in this case when there is a fault or problem occurs in underground system. And service is too much high, it is a very expensive and time consuming to rectify this problem we are going to design robot, a special kind of robot which will be used for the maintenance purpose. So the robot is designed specially with the such a frame which is universally acceptable and design as per the standards. as well as the robot is having some special equipment i.e camera, some sensor for detecting its surrounding condition. as well as some mechanism which are used for maintenance purpose. Robot is capable of up to 66kv.