考虑再生能馈装置的城市轨道交通整流器过电压抑制方案

Over-voltage Suppression Scheme for Urban Rail Transit Rectifier with Regenerative Braking Energy Feedback Device

城市轨道交通增设再生制动能量回馈装置后,不可避免地会向牵引供电系统中注入谐波。若参数选取不合适,则可能导致原整流器电阻电容过电压抑制回路的电阻温升达到极限值甚至烧毁,从而影响列车运行的安全。从理论分析及试验验证两方面对再生能馈装置接入后的整流器电阻电容过电压抑制回路参数选择进行了研究。研究结果表明:该回路采用△型接线方式、降低吸收电容、提高吸收电阻阻值,能有效降低吸收电阻的温升,提高安全可靠性。

After the regenerative braking energy feedback device being added to urban rail transit rectifier unit,harmonics will be injected into the traction power system.If the parameter selection is not appropriate,the resistance temperature of the former rectifier RC(resistor-capacitance circuit)over-voltage suppression may reach the limit value or even burn down,directly affecting the stability of train operation.The selection of rectifier RC loop parameters after the connection with regenerative braking energy feedback device is studied by means of theoretical analysis and experimental verification.The result shows that the rectifier RC could effectively reduce the temperature rise of absorption resistance,improve the safety and reliability of the system due to the adoption of△type connection mode,the reduction of absorption capacitance and the increase of absorption resistance value.