The Design Of High Voltage Cable Engineering In Pingtan Strait Bridge

As the paces of reform and opening are strengthened in recent years, the governmen ts have put forward the construct of building resource thrift and environment friendly soc iety harmony, China State Grid Corp also strengthened the transmission line construc tion requirements. Under the guiding spirit, all kinds of "new technology, new materia 1, new technology" is widely used in the construction of power grids.With China’s rapid economic development, for the regional planning is more detailed, open at all levels of government on the island have been increasingly warmi ng, regional status island is more and more important. At present, the island has been planning for comprehensive test area, New Development Zone, port and dock. act. an d the convenient transportation has become a condition precedent to island develop ment. Therefore, local governments at all levels often build the traffic bridge to conn ect the island and the mainland channel,. It also provides us a new way to solve the long island power transmission problem.Relative to the submarine cable laying mode, using the traffic bridge laying power cables, which can break the transport capacity without large cross section cable cause d by. At the same time, the bridge can be used on conventional cable, has the highe r economy; also, through the bridge power cable laying, provide the channel for ca ble repair and maintenance in the future, greatly improving the reliability of the cabl e operation.The article focus on the technical characteristics of the bridge high voltage cable s, carry out the development of bridge vibration of cable, cable under the condition of temperature change, bridge expansion case telescopic performance, vibration and th ermal expansion under the influence of the metal sleeve long-term stress fatigue, traffi c bridge laying on the high-voltage cable line electromagnetic environment effect of high salt spray environment, bridge structure, material selection and anticorrosive proj ect research and cable on the bridge of the operation life and so on.The article combined with domestic similar projects carried out investigation and study, and combined with the engineering characteristics of its own, it demonstrates t he determination of standard cable, cable structure characteristic and form of joint, and through the analysis of the causes of the cable line fault, then putted forward th e safety measures to prevent cable line fault. At the same time, according to the char acteristics of the design of bridge, the contents of the article also includes the desig n earthquake measures, the bridge cable telescopic performance, high salt fog environm ent of the bridge structure and corrosion etc., and the traffic bridge laying high-voltag e cable electromagnetic environmental effects in detail.As a typical case of traffic bridge laying high-voltage cable, on the one hand, ne ed to solve the effect of high-voltage cable traffic on the bridge, to meet the safety r equirements of public area; on the other hand, need to solve the traffic bridge from t he technology of the specific performance of the influence of high voltage cable, to ensure the safe operation of the power network. The project will provide future isla nd power supply with a new mode and has a certain reference value.