新型模糊控制有源滤波器移相调压补偿的研究

Study on a Novel Fuzzy Controlled Active Power Filter in Compensation for Phase-shift Voltage Regulator

针对大功率晶闸管移相式电压调节器产生的谐波电流,提出适合于就地补偿的新型模糊控制有源电力滤波器(APF)方案,有效地解决了补偿电流检测及非线性控制问题。该方案对三相APF进行电路模型分析,基于并行分布补偿方式采用Takagi-Sugeno模糊控制方法,设计了模糊反馈控制器。在稳定性条件下求解线性矩阵不等式,得到补偿控制策略的状态反馈增益,对电源电流进行模糊控制并获得补偿电流。仿真及实验结果验证了模糊控制的有效性及谐波电流检测的准确性。

In view of compensation harmonic currents caused by high-power thyristor phase-shift voltage regulator,a novel active power filter（APF） with fuzzy control is presented which produces compensation locally.Based on the circuit and mathematics model analysis of three-phase APF,Takagi-Sugeno（T-S） fuzzy logic model is established with feedback control which solves the nonlinear control and compensated currents problems.Under condition of the stability of the proposed T-S fuzzy model,parallel distributed compensation is employed to design fuzzy controllers,the stable feedback gains are solved by linear matrix inequality via Matlab.Computer simulations and experiments indicate the correctness of compensated current examination and valid performance by this fuzzy controller.