【摘要】 通过对EAST纵场电源电流不平衡时电网侧谐波的傅里叶分析发现,两组电源的均流程度对注入电网电流谐波有重要影响,提高两组电源的均流程度能有效降低电网的谐波总畸变率,改善注入电网电流波形,因此对两组电源进行均流是十分必要的。根据电源参数和均流的要求,给出了电源均流控制器结构图,并计算出控制模型的参数,最后建立了Simplorer整流器模型并进行了仿真。仿真结果表明,两组整流电流相差不大,励磁到设定值时最大相差2A,均流效果比较理想。更多还原

【Abstract】 Toroidal field power supply (TFPS) was made to get the low output voltage and large operating current for experimental advanced superconducting tokamak (EAST). In EAST, the 12-pulse midpoint converter was preferred, which was formed by two groups of 6-pulse converters in parallel directly. By analyzing the harmonic current of power system, the current sharing was important in EAST. The current sharing controller was designed to control the circulating current of the two groups. At last, the results of the simulation verify the feasibility of the proposed control scheme.更多还原