| 摘要 |
<p>An active current injection device (117) generates and injects fundamental and non-fundamental frequency current components onto an AC power line (111). A current pump control circuit (132) receives an input signal which is representative of the power line voltage and generates a control signal which is used to generate a fundamental frequency current component which lags the line voltage by approximately 90 degrees. This fundamental frequency current component is transmitted through an impedance (131) to the line (111), thereby causing a fundamental frequency voltage drop across the impedance (131). A damping control circuit (116/176) receives an input signal repesentative of the line voltage and generates an output signal having first and second components proportional to the line voltage and the line voltage rate of change, respectively. The output signal is used to generate an electronic load current component which loads non-fundamental frequency components of the line voltage.</p> |
