Recontruction And Actualization Of Transformer Substation Automatic Control For Fuzhou West Area Water Plant

Transformer substation is very important for power supply system. The level of transformer substation automatic control can directly affect the reliability of power system running. With the perfection of microcomputer protection units, the development of transformer substation automatic control is also very quick. What is called transformer substation automatic control system is based on the technology of computer hardware, micro-electronics, data communication and module software. It is a microcomputer control system which is combined control , protection, measuring and remote function with feature of high reliability, good real-time and easy to be maintenance. This will be a direction for the development of new transformer substation and reconstructive transformer substation.With the research and discussion of a 35/6kV and two 6kV transformer substations'protect system of Fuzhou West area water Plant, the dissertation analyses and designs a new protect system of the secondary system. This system can be connected with local area net and increase the level of water plant's management level. It also introduced the main element used in the transformer substation automatic control system --- the principle and relative technologies of microcomputer protect unit. Based on the present state of power supply and the function of transformer substation, it determined the distributed configuration. Every protection unit is fit on high voltage switch box which reduced the investment and simplified the secondary connection. The control system software is completed on the platform Windows NT, using the language of VB. The communication of LAN used TCP/IP. It also introduced the operate process and sum up the impact and put up with the suggestion to be improved.This reform design completed the automation control of transformer substation and highly increased the reliability. Operators can manage transformer substation by microcomputer. And with the new system, the historical data can be recorded and it is convenient for searching. For the secondary system, faults can be diagnosed on line. The connection between our local area net and transformer substation increased the management level of our plant greatly. It provides a lot of experience for the reform of secondary system of other transformer substation.