双模糊电力系统稳定器实现

Implementation of power system stabilizer with double-fuzzy structure

针对常规模糊电力系统稳定器(C-FPSS)稳态性能差、结构简单、不利于规则调整的缺点,提出了能在线调整量化因子的双模糊电力系统稳定器(D-FPSS)的设计方案,在C-FPSS基础上增加了一个上级模糊控制器,形成二级模糊控制系统。该控制器通过调整加权因子改变控制规则,再用优化的控制规则进行控制。在Matlab/Simulink环境下采用龙山发电厂的参数进行非线性仿真,在不同故障运行条件下的结果分析表明:D-FPSS控制超调小,稳定速度快;控制效果受系统运行方式影响小,适应能力强;可很好地适应运行点的变化,具有较好的鲁棒性。在实际应用中,以M68HC705P9单片机为例,通过查表法实现D-FPSS,不但能够对控制规则在线优化,而且成本低、设计简单,有实用价值。

Since C-FPSS（Common Fuzzy Power System Stabilizer） has poor steady state performance, simple structure and difficult rule regulation ,a D- FPSS（Double-Fuzzy structure PSS） is proposed, which adds a superior fuzzy controller to the C- FPSS to on-line regulate the quantization factors, forming a two- level control system. The control rule is optimized by regulating the weight factor. Different fault conditions with parameters of Longshan Power Plant are simulated with Matlab/ Simulink and results show that the proposed D- FPSS has fast and stable control performance with small overshoot,good adaptability to the change of system operating mode and strong robustness for different operating implemented using points. Taking reference table M68HC705P 9 microcontroller as a practical example,D- FPSS is method,which realizes on-line control rule optimization with low cost and simple design.