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随着国家坚强智能电网的发展,智能型电力电子设备及技术在智能电网中大量使用。由于电力电子器件具有非线性特性,其使用给智能电网带来了谐波污染等问题。并联型有源电力滤波器采用了应用广泛的谐波抑制和无功补偿技术,它能对智能电网中的谐波和无功进行较好地动态补偿。分析了并联型有源电力滤波器的补偿原理,利用包含直流侧电压环控制的ip-iq法进行智能电网指令电流的检测和定时滞环电流跟踪控制方法对并联型有源电力滤波器进行电流跟踪控制,使用Matlab/Simulink搭建仿真模型,并从不同的控制角进行实例仿真。仿真结果和快速傅里叶分析表明,对于非线性负载晶闸管的不同触发角,定时滞环电流跟踪控制都能有效地实时跟踪控制,仿真模型系统能够实时检测出系统中所含指令运算电流,并进行有效补偿,达到了理想的效果。
With the development of national strong smart grid, intelligent power electronic devices and technologies are widely used in smart grids. Due to the non-linear nature of power electronics, their use poses problems with harmonic pollution and other issues to the smart grid. Shunt active power filter uses a wide range of harmonic suppression and reactive power compensation technology, which can be smart grid harmonics and reactive power to better dynamic compensation. The compensation principle of shunt active power filter is analyzed. The ip-iq method including DC link voltage loop control is used to detect the current of smart grid and the tracking control method of time-lag current. The shunt active power filter current Tracking control, using Matlab / Simulink to build simulation model, and from different control angles for instance simulation. The simulation results and fast Fourier analysis show that the tracking control of the hysteresis loop current can be effectively tracked in real time for different firing angles of the nonlinear load thyristors. The simulation model system can detect the commanded current in the system in real time Effective compensation, to achieve the desired effect.