Loss Optimization Method for Controllable Current Source Converter Based on Two-level Model
The Reverse blocking integrated gate commutated thyristor(RB-IGCT)is the feasible devices for controllable turn-off current source converter.During the operation of the converter,the generation of losses causes the junction temperature of the chip to rise,thereby limiting the operating ability of the converter valve.Therefore,clarifying and optimizing the device's junction temperature in the current source converter(CSC)is necessary.In this paper,the systematic loss characteristics and constraints are proposed,and a two-level model of loss suppression is established,and the solution method is given.According to the results of this model,the comprehensive optimization methods such as snubber circuit design and loss analysis are given,the range of snubber circuit and stray parameters is studied,and the loss of optimized CSC is compared with that of line-commutated converter(LCC)and voltage-source converter(VSC).The results indicate that based on the parameter tuning of the two-level optimization model,the device loss is 5.7kW,the resistance loss is about 1.8kW,and the device junction temperature increment is 38 ℃.the ratio of CSC loss to system is 0.54％.
万方数据
维普
