Lightning Outage Analysis of Power System of Mucha Condola

• Main Authors: CHAO-LIANG WU, 吳肇良
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/75175911000148972994

碩士 === 中原大學 === 電機工程研究所 === 96 === Mucha Condola has been commissioning since July 4, 2007. The safe-line module in the control center has been damaged by lightning twice in the same month. In view of this, the first time lightning event, which refers to the event due to the lightning stroked on the No.13 tower, shall be simulated in this thesis. The simulated are the distributions of lightning current along the safe-line into the safe-line module of the control center. The ATP-EMTP has been adopted to construct model, which is applicable simulating the transmission tower and the low voltage control system, but not directly applicable to simulating the towers of condola. To solve this problem, the CDEGS software has been adopted to construct the to equivalent tower circuit model required by ATP-EMTP. CDEGS uses the electromagnetic field simulation methods to find the equivalent towers model parameters. In addition, the simulated also included the lightning current through the safe-line, the arrester, and the safe-line module in the control center. The simulation results show that: Of the lightning current is above 25kA, and the surge impedance of the safe-line is below 11, the arrester installed to protect the safe-line module shall have difficulty is withstands the lightning current, which cause the damage of safe-line model. After this lightning event, Mucha Condola center then installed another arrester to strengthen the lightning protection for the safe-line module, and also improved the ground mesh of the control center. In order to help discharging the lightning current.