中文摘要：

针对凸极同步发电机发生匝间短路故障时谐波电流检测问题,提出一种新的基于Duffing混沌系统的检测方法。该方法首先通过多回路分析理论建立凸极同步发电机数学仿真模型,给出故障谐波电流仿真信号,然后利用Duffing系统灵敏的弱信号检测特性,通过识别Duffing系统由混沌状态到大尺度周期状态的转换过程来确定故障谐波电流的存在。仿真计算结果表明Duffing混沌系统可以检测出谐波电流,检测方法是有效的。

英文摘要：

Aimed at the problem existing in harmonic current detection when the inter turn short-circuit fault happens in sa-lient-pole synchronous generator,a new detecting method based on Duffing chaotic system is proposed in this research. The mathematical simulation model of salient-pole synchronous generator is established on the basis of multi-loop analysis theory, the simulation signals of the fault harmonic current are given,and then the exist of fault harmonic current is determined by the sensitive weak-signal detection features of Duffing system and by identifying the conversion process from chaotic state to large-scale periodic state of Duffing system. Simulation results show that Duffing system can detect the harmonic current. The detecting method presented in the paper is effective.