Research On Energy Saving And Comprehensive Performance Optimization Design Of 525kV Transformer

In the context of rapid economic and social development and increasing power demand,transformer,as a key equipment in power network,plays an important role in the safe and reliable operation of transformer and the realization of energy saving and consumption reduction.In this paper,based on the analysis of transformer loss and basic principle,a 525 kv energy-saving transformer is designed,and its performance is analyzed and calculated.The main content of this paper is as follows:(1)Reducing the no-load loss and load loss of the transformer is of great significance to the safe,economical and reliable operation of the transformer.Firstly,this paper focuses on the theme of energy-saving transformer design,and describes the working principle and basic equation of autotransformer.Secondly,the requirements,forms and application scope of existing transformer windings are analyzed.Finally,based on the above research,this paper analyzes the hysteresis loss,eddy current loss and additional loss in the transformer no-load loss,and analyzes the influencing factors of different losses based on its empirical calculation formula.The basic copper loss,winding eddy current loss,circulation loss and structure stray loss in transformer load loss are analyzed and calculated.(2)Based on the above theoretical analysis and research,combined with the transformer design calculation process,this paper designed a 525 kV single-phase threewinding energy-saving autotransformer.Firstly,the overall structure and main technical parameters of the designed energy-saving transformer were given.Secondly,the main components where the transformer no-load loss and load loss occur—core and coil were designed.Under the premise of comprehensive performance optimization of transformer,the main technical fabrication measures of the transformer were given from two aspects: coil winding and core manufacturing.To verify the performance of the designed 525 kV,this paper first calculated the performance parameters of the designed 525 kV energysaving transformer,and conducted simulation analysis.The rationality of the designed transformer parameters and the overall structure were verified by short-circuit current,electric field strength and electrodynamic analysis and calculation,also geomagnetic current impact analysis.(3)In addition,further verification of the reliability and economy of the designed transformer were conducted by measurement of winding resistance,insulation resistance,no-load current and no-load loss,short-circuit impedance and short-circuit loss,etc.Finally,by comparing with the main performance parameters of the conventional transformer,the performance of the 525 kV energy-saving transformer meets the design requirements and relevant standards,and its no-load loss and load loss are significantly reduced,the no-load loss is reduced by 40.71% and load loss is reduced by 18.79% when compared to regular design transformers with same rating.Therefore,the designed transformer is in line with safety,reliability,economic requirements.The paper provides subsequent reference for the design and manufacture of energy-saving transformers.