变压器组
1.The extending techniques such as vector transform， excitation inrush current , TA saturation and so on are analyzed, which resolves the question that the traditional optical differential protection can not satisfy the request of line-transformer unit.
3.This paper presents three ways of distinguishing conn eeting groups of three phase transformers.
4.Calculation of AC loss for HTS transformer on EMU
5.General Design of HTS Transformer for EMU
6.Utilising dissolved gases analysis,a new insulation fault diagnosis method for power transformers is proposed.This method is based on the group grey relational grade analysis method.First,according to the fault type and grey reference sequence structure,some typical fault samples are divided into several sets of grey reference sequences.These sets are structured as one grey reference sequence group.Secondly,according to a new calculation method of the grey relational coefficient,the individual relational coefficient and grade are computed.Then according to the given calculation method for the group grey relation grade,the group grey relational grade is computed and the group grey relational grade matrix is structured.Finally,according to the relational sequence,the insulation fault is identified for power transformers.The results of a large quantity of instant analyses show that the proposed method has higher diagnosis accuracy and reliability than the three-ratio method and the traditional grey relational method.It has good classified diagnosis ability and reliability.
7.Type TBQ15-1403 / 25 transformer used for driving force scattered EMU
8.The interval between charge and discharge is required to be 2~4 second, this requirement demands greatly high charge efficiency, so that the charge system takes the way of three-phase L-C resonance charge with constant current, the output of the resonance circuit can charge the capacitor set fast through the voltage-ascent transformer and silicon converter equipment.
9.Shell Main Transformer with Nonpressure and Fully-Enclosed Structure for KDZ1 AC EMUs
10.The simulation on IEEE 30-bus system shows that,the proposed method reduces action times of compensatory devices and transformer taps,in which the switching time of capacitors at bus 12 is reduced from six to two,and the daily active power loss of the system is reduced from 1.241 3 p.
