静止同步串联补偿器变参数非线性暂态稳定控制器的设计

静态同步串联补偿器(SSSC)对发电机暂态电动势、转子角速度等的直接影响为阻尼电力系统低频振荡提供了可能。文章在电力系统转子运动方程中计及了SSSC的作用,提出了SSSC的自适应变参数非线性控制方法。以SSSC 注入电压的相角和幅值调制系数为控制变量,在电力系统分析综合程序(PSASP)中利用用户自定义模型和程序接口(UD&UPI)建立了SSSC的暂态控制器,并利用EPRI-7 节点系统进行了暂态仿真,仿真结果验证了文中控制方法抑制低频振荡的有效性。

Design of Transient Stability Controller of Static Synchronous Series Compensator Based on Variable Parameters Nonlinear Control

The direct influence of static synchronous series compensator (SSSC) on generator's quadrature-axis transient e.m.f and rotor angular velocity offers the possibility to damp the low frequency oscillation of power system. Here, the action of SSSC is taken into account in rotor motion equations of power system and an adaptive nonlinear variable parameter control method for SSSC is proposed. Taking both phase angle of injected voltage and amplitude modulation factor of SSSC as control variables, a transient stability controller of SSSC is built by use of user-defined model and user's program interface (UD/UPI) in Power System Analysis Software Package (PSASP). The transient simulation is performed by EPRI 7-bus system, and simulation result shows that the proposed control method is effective in damping the low frequency oscillation of power system.