The Characteristics Simulation and Analysis of Grounding System for Long Distance Extra High Voltage Underground Cable

• Main Authors: WEI,HSIN-YU, 魏信裕
• Other Authors: CHO,MING-YUAN
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/j92xaj

碩士 === 國立高雄應用科技大學 === 電機工程系博碩士班 === 104 === In recent years, in order to enhance the electricity quality and to reduce the people’s contend, transmission line is designed with underground approach for urban area and science parks. Since the voltage level of cable become larger and severed transient behavior seriously affect system reliability, the underground cable is necessary from EHV substation to EHV substation. Once cable is striking by switching impulse and its transient is travelling along cable; the damage will seriously affect the operation and life time of cable. In order to increase the cable operating life time, the explore and analysis of switching transient is required. This thesis applies the EMTP/ATP software tool to establish the equivalent circuit model to simulate the behavior of circuit breaker switching transient for underground cable. A 10 km Kaokang-Wuchia section of Kaokang-Wuchia-Kaohsiung loop built in 2014 is selected for computer simulation examined the correlation between switching transient and cable characteristics to justify the effectiveness of the proposed method.The simulations results can be used as reference for design of underground cable of Taipower. Moreover, the proposed method will apply to other transmission line to enhance the electricity quality and reliability.