Research On The Design And Operational Problems Of 330kV Transformer Substation

With the advance of scientific technology and the development of economy,the spreading of power grid is bcoming larger and larger.Thus the requirement for the design of power grid and type selection of electrical power equipments is becoming higher and higher.Though there is a rapid development of 330 kV transformer substations in the north-western area,how to design 330 kV transformer substations and make efficient use of electrical equipments is one of the important subjects needing to be studied on and solved in the construction and reformation of power grids in north-western area,as it is restricted by the complicated constructive geographic conditions and other objective conditions.This essay takes one 330 kV transformer substation in north-western area as the example,analyzes the existing problems in the operation of this transformer substation and finally puts forward a certain improvement plan.The main content of this eassay is as following:This essay makes a detailed research on the current situation of the design of 330 kV transformer substations both at home and abroad.It also puts forward the design aim for the transformer substation mentioned above according to the actual requirement of the project on the basis of concluding all the results during the process of its development.In order to promote the development of Binhe Riversied Districtin Ningxia and satisfy the newly-loaded power requirement of this area,we need to build Yue Ya Lake 330 kV transformer substation to improve reliability and quality of its power supply.This essay is a generalization of Yue Ya Lake 330 kV transformer substation from three aspects: security,economy and reliability.It affirms mian connection modes in three grades,the number of main transformers,capacity and their types according to load calculation and short-circuit current.It analyzes the matlab/simulink software model in the form of steady state simulation.Also,this essay selects the types for circuit breaker,disconnector and mutual inductor accordingly,and designs the relative relay protection allocation and plane layout of electric equipments.It makes an assessment on the electric equipments according to the load,main wiring and running status of the transformer substation.Then it calculats out the malfunctional situation of the electrical equipment which reflects the inefficiency in current the design of the substation.This essay illustrates the malfunction of on-site equipment,making simulation analysis by using matlab software to build models of transformer and the relay protection device of the system.Also it makes field test analysis of mutual inductor by using the "standard comparison method".According to the equipment of the cause of these problems,corrective and preventive measures are put forward.This essay analyzes and discusses existing problems of direct current system in transformer substation and their countermeasures and gives the corresponding solutions in combination with the actual situation.On the basis of the existing dc system,this essay puts forward the optimized configuration scheme and verifies the optimized dc system reliability through the matlab software to build models for simulation analysis.Finally,this essay introduces the problems existing in the operation of substation integrated automation system,puts forward the preventive measures and improvement opinions.It also proposes an optimized configuration scheme towards configuration of the original system such as communication,measurement and so on,and does the reliability calculation analysis acchordingly.