【摘要】 由于经济技术的原因,无源滤波一直是消除直流系统换流站交流侧谐波的主要手段。交直流混合输电系统产生了多谐波通道,直流系统两端换流站交流侧的谐波也可以相互渗透,这会影响到已安装使用的无源滤波器的滤波性能。文中提出了在高压直流输电系统交流侧采用并联无源滤波器串联有源滤波器的混合滤波方案,建立了以初期投资最小为目标函数的数学模型,在此基础上采用遗传算法进行无源滤波器参数的优化设计。仿真结果表明,该滤波方式与无源滤波方式相比,能够更好地改善滤波器的性能,且所需的有源滤波器的额定容量比较小。更多还原

【Abstract】 Due to the economic and technical reasons, passive filters are main means to eliminate the harmonics at the AC side of converter station in HVDC system. In AC/DC hybrid system the multi-harmonic paths are formed, so the harmonics at the AC side of the converter stations located at the both sides of DC system can interpenetrate, therefore, it will affect the filtering performance of the passive filters which are installed and used. Here, a hybrid filtering scheme is put forward in which the shunt passive filters are connected in series with active filter, and its mathematical model which takes the minimized initial investment as objective function is established, on this basis the optimal parameter design of passive filter is carried out by means of genetic algorithm. Simulation results show that compared with the filtering mode only using passive filter, this filtering mode can improve the performance of filters better and less rated capacity of active filter is required.更多还原