Study On Hengqin Digital Substation Protective System And Whole Life Cycle Cost

In order to meet the Zhuhai city Xiangzhou district and Hengqin new area power loaddemand, adapt to the Zhuhai’s Hengqin Island Economic Development and power grid planningand adapt to the need of China Southern Power Grid on Macao power supply company to makecontribution, set up220kV with substation project, this can be attached to the project of integratedprotection device of main part, complete the following four parts:1．The thesis discusses the digital substation protective system of communication networkpart, merging unit and integrated protection device of three parts, discusses the communicationnetwork architecture specific forms, problems and corresponding solving methods; design ofmerging unit function structure; according to protection of software components, software designof the system structure, as well as software process.2．This thesis has completed the IED equipment configuration, and has also designed areal-time database and a database interface based on IEC61850. Furthermore, it has accomplishedthe communication control and ACSI management.3. The thesis introduced the LCC methods of the basic concepts, basic method. And inaccordance with the digital substation, this thesis has illustrated the digital substation LCCcomponents, and according to these components, to establish a digital substation LCCmathematical model, and the model of time variation amount correction.4. According to the four different technical solutions, application of the LCC method forevaluation of life cycle cost of digital substation, every part of the input and eventually the entirelife cycle cost, and the relationship between the analysis and discuss.Through the above four parts of research work, it can be important conclusion, increase theinitial investment cost, good digital substation integrated protection device, can save the wholeproject in the whole life cycle cost.