公开(公告)号：EP0974083A1

公开(公告)日：2000-01-26

申请号：EP97953203.3

申请日：1997-12-15

申请人： ABB POWER T & D COMPANY INC.

发明人： OTHMAN, Hisham ,  VEDAM, Rajkumar

IPC分类号： G05F1/70

CPC分类号： H02J3/1842 ,  Y02E40/22

摘要： Voltage flicker is a power quality problem in power distribution circuits (10) which is caused by the operation of fluctuating loads (18) such as AC and DC electric arc furnaces, spot welders, starting of large ac motors, and the like. Converters (12) based on Voltage Source technology (VSC) connected in shunt close to the fluctuating load are found to have the capability of reducing the voltage flicker level. Flicker control systems (20) responsive to the active and reactive power components are used to exploit the capabilities of VSC in accordance with the invention. The flicker control systems (20) reduce the voltage flicker observed at the point of common coupling by adapting, e.g., H-infinity, Linear Quadratic Gaussian, Mininum Variance Control, and self-tuning design methods for flicker control in power systems (10) having fixed or self-tuning flicker controller parameters.

摘要翻译： 电压闪烁是配电电路10中的电力质量问题，其由交流和直流电弧炉，点焊机，起动大型交流电机等的波动负载（18）的操作引起。 发现基于电压源技术（VSC）的转换器（12）在接近波动负载的情况下并联连接，可以降低电压闪变水平。 根据本发明使用响应于有功和无功功率分量的闪烁控制系统（20）来利用VSC的能力。 闪变控制系统（20）通过使电力系统（10）中的闪变控制适应例如H-无穷远，线性二次高斯，最小方差控制和自调谐设计方法来减少在公共耦合点处观察到的电压闪变， 具有固定或自调整闪烁控制器参数。