Application Of High Voltage Cables Online Monitoring System In Huizhou

As economic boosted rapidly in the last decade,land usage for public utilization in large cities became a serious issue,since it was hard and too expensive find proper land.Huizhou power supplement company in the recent years began to modify the old style overhead transmission lines into underground lines in urban district an a counteraction.For the time being,10 kV and below transmission lines modification had been finished and 110 kV transmission lines modification had been extend to the boundary of urban disctrict and some suburban district with limited land supply.There were only 6 110 kV transmission lines in 2008,comparing to 32 in 2013.That is quite an aggressive increase of 4 times in 5 years.Power cables with cross—linked polyethylene insulation is widely used in Huizhou.Such equipment is expensive and complicated to repair.Once being malfunctioned,the core area of the urban could suffer serious black out which caused significant loss of industrial and commercial users.Periodic examination was used as major measure to avoid such malfunction but fail to meet the need of rapidly increasing cable numbers and more restrict government requirement.High voltage cable online monitoring system can guarantee real-time feedback to engineers so as to recognize potential threat and glitches.It is a reliable way to avoid malfunction of equipment,to get more information of the equipment,and to help extend the life time of the equipment.This thesis takes Huizhou power grid as an example to investigate the application of the high voltage cable online monitoring system.The classification,the cause and the precaution of high voltage cable malfunction is described and the solution provided by high voltage cable online monitoring system is then discussed,which includes the principle,the composition,the system requirement and the equipment setup.Demonstration is presented to describe the condition and the function of high voltage cable online monitoring system in Huizhou,which provide valuable information for management of the power supplement company and reduce the risk of massive blackout.