System for Compensating Power Quality of Feeding equipment of Electric Railway

摘要

Power quality compensation apparatus of the present invention include: a) to be parallel-connected to power compensation and harmonic current DC agent to maintain constant first inverter of link voltage, b) the second inverter is connected to a power supply in series with offset voltage pressure drop, c) shared the first inverter of content of the first inverter and the second inverter to the second inverter DC link voltage source for providing the DC link of a voltage, d) controller, the status-quo approach and DC link voltage of first inverter of its operation for being used to control the second inverter and voltage drop and harmonic current compensate. Electric energy quality compensating device according to the present invention, which is parallel inverter and series inverter, can be not only effective by compensation harmonic electric current of powering and improved efficiency in the DC link compensation of middle voltage drop, by sharing the control voltage and PFC that it may be implemented.