(12期拿下）SSSC阻尼系统功率振荡的控制器设计

阻尼系统的功率振荡是静止同步串联补偿器(SSSC)重要的作用之一。考虑了SSSC内部动态的变化过程,即控制器的输出电压幅值与相角变化及直流侧电容动态调节过程,在此基础上建立SSSC的动态模型。推导脉冲宽度调制系数变化量与电角速度变化量之间的关系得到控制系统的传递函数,通过对控制系统中的参数控制从而对SSSC进行控制,而控制系统的参数是通过人工蜂群(ABC)的优化过程进行调整的。该优化方法以角速度差为目标,通过不断迭代更新,最后得到控制系统控制参数的最优解。在MATLAB中搭建模型,通过与传统PI控制仿真效果进行对比,通过优化方法能够有效快速的调整控制参数,从而更好地调节SSSC等效注入电压,有效地提高输电线路传输有功功率的能力,快速抑制系统功率振荡。

Design of SSSC Auxiliary Controller for Damping System Power Oscillation

One of the most important functions of static synchronous series compensator (SSSC) is power oscillation damping system.Considering the change process of SSSC internal dynamics, namely the dynamic adjustment process among output voltage amplitude of controller, phase angle changes and the DC side capacitor, on this basis, the SSSC dynamic model is established.The control system transfer function is obtained by deriving the relationship of pulse width modulation coefficient with the amount of change in the electrical angular velocity variation, by controlling the parameters of the control system, and thus achieving SSSC controls, and optimization process of adjustment of parameters in control system achieves by artificial bee colony (ABC).The optimization method takes angular velocity difference as the goal, through continuous iterative update, and finally gets the optimal solution of parameters in control system.Built in MATLAB model, comparing with the conventional PI control simulation results, the proposed optimization method can effectively and quickly adjust control parameters, and then, regulate the SSSC equivalent injection voltage in a better way, which effectively improves the active power transmission capacity in transmission line, and suppresses the system power oscillation in a fast way.