八脉冲换流逆变器构成的串级调速系统仿真研究

Simulating Reseach of the Cascade Control System with Eight-Pulses Commutation Inverter

利用Matlab中的交互仿真集成环境软件包Simulink建立八脉冲发生器模型、逆变桥仿真模型、八脉冲换流逆变电路仿真模型。对逆变电路进行仿真研究,验证了八脉冲换流逆变器构成的串级调速系统的可行性。对其在不同控制角下的电压、电流的相位关系进行了研究,分析了该系统能提高功率因数的原理。并且通过仿真指出了该系统应考虑的关键参数设定问题以及由于逆变电路采用强迫换流方式该系统应注意的问题。

The integrated software package Simulink in Matlab is adopted to build the eight-pulses generator model, the inversion bridge simulating model and the eight-pulses commutation inversion circuit model. By simulation the inversion circuit and proofs are researched that the cascade control system with the eight-pulses commutation inverter is feasible. The phase relation of the voltage and the current at different control angle are researched, the increasing principle of the power factor of the system is analyzed. The simulating research points out the setting problem of the key parameter of the system, and some problems that the forced commutationbrings, that must be noticed and overcome.