一体式整流斩波充电装置在智能轨道快运系统的应用

Application of Integrated Rectifier Converter Charging Device in Autonomous Rail Rapid Transit

目的:为满足智能轨道快运系统大功率充电需求,提出一种智能轨道快运系统充电装置的新型结构,其能满足在一体化智能箱式充电站内的安装,避免在乘客站台安装带来的噪声和接口等问题。方法:智能轨道快运系统快速充电装置结构包括输入侧交流断路器、预充电回路、网侧滤波回路、PWM(脉冲宽度调制)整流回路、Buck直流变换回路和直流侧滤波回路;PWM整流实现交流到直流功率变换;直流Buck变换实现直流电压输出满足智能轨道快运系统车载储能元件充电的恒压、恒流及恒功率的充电模式;预充电路减少系统工作时的合闸冲击;网侧滤波减少了注入电网的谐波电流;直流侧滤波采用电感L和电容C组成低通滤波器来滤除高频分量输出,减少纹波电流输出到储能介质。结果及结论:通过仿真、选型计算的充电装置采用双环控制提高了系统的动态性能,有源阻尼技术有效抑制了谐振,正反转双序锁相环实现了网侧适应性控制、系统控制及保护对Buck和PWM整流进行控制,实现输出的恒压及限流控制。充电装置已经成功应用于株洲智轨一期工程项目,项目通车验证了充电装置能够安全、高效地给智能轨道快运系统车辆充电。

Objective:To meet the ART(autonomous rapid rail transit)system large-power charging needs,a new structure for ART charging device is proposed,which can be installed within an integrated intelligent box-type charging station,avoiding noise and interface problems caused by the installation at passenger platform.Method:The system structure of the ART fast charging device includes input-side AC circuit interrupter,pre-charge circuit,network-side filtering circuit,PWM(pulse width modulation)rectifier circuit,Buck DC(direct current)conversion circuit and DC-side filtering circuit;PWM rectifier realizes AC to DC power conversion;DC Buck conversion realizes DC voltage output meeting the ART on-board energy storage component charging mode of constant voltage,constant current and constant power;pre-charge circuit reduces the closing striking during system operation;network-side filtering reduces the harmonic current flowing into the power grid;DC-side filtering uses inductance L and capacitance C to constitute a low-pass filter to filter out the output high-frequency component and reduce the output ripple current to the energy storage medium.Result&Conclusion:Through simulation and type selection calculation,the charging device uses dual-loop control to improve system dynamic performance,the active damping technology to effectively suppress resonance,the forward and reverse rotation dual-phase locked-loop to realize grid-side adaptive control,system control and protection to manage Buck and PWM rectifier,and ultimately achieves constant voltage and current limitation control.The charging device is successfully applied in Zhuzhou ART phase I project,project vehicle launch verifies that the charging device can safely and efficiently charge ART vehicles.