基于混合信号状态机的交流固态功率控制器功能模型

提出了一种基于混合信号状态机的交流(AC)固态功率控制器(SSPC)功能模型。通过分析交流SSPC工作特点和工作模态得出其状态转换规律和阻抗变化规律。定义了交流SSPC的3个稳定状态、4个中间转换状态和11个状态转换函数以描述交流SSPC在稳态导通和关断、零电压开通、零电流关断以及短路故障关断过程中的阻抗转换规律。讨论了交流SSPC短路故障关断的两种方式:"立即关断"和"零电流关断"的功能级建模方法。利用Saber软件的混合信号状态机建模工具StateAMS实现了该模型,并与两种短路关断方式交流SSPC实验结果对比验证了模型准确性。模型仿真速度测试结果对比表明该模型能够显著提高仿真效率。

Functional modeling of AC solid state power controller based on mixed signal state machine

The paper develops a functional model for the Alternating Current (AC) Solid State Power Controller (SSPC) based on mixed signal state machine .State transition and impedance variation rules are obtained by analyzing the working modes of the AC SSPC .The model defines three stable states ,four intermediate transition states and eleven transition func-tions to imitate the impedance variations of AC SSPCs during ON/OFF state ,zero voltage switch-on ,zero current switch-off , and switch-off after short fault .The model considers two switch-off ways for the AC SSPC with short faults:instant switch-off ,by which the fault current is instantly reduced to zero in a linear way ;and zero current switch-off .The model is imple-mented by the mixed signal state machine modeling tool (StateAMS) in Saber .Accuracy of the model is verified by configu-ring the model according to the test results of two AC SSPCs .Speed test results show that the proposed functional model can significantly improve computation efficiency .