应用虚拟同步电机技术的电动汽车快充控制方法

发布时间：2018-05-30 02:08

本文选题：电动汽车 + 快充　；参考：《中国电机工程学报》2014年25期

【摘要】：快充是电动汽车的一大关键技术。基于虚拟同步电动机控制策略,提出一种电网友好的电动汽车快充解决方案。该方案由交流接口和直流接口两部分组成,其中交流接口的三相H桥整流电路将电网电压整流为600 V直流电压,再经过直流接口的大功率DC/DC变流器转换为48 V的直流电压,供给电动汽车负荷。交流接口方案采用虚拟同步电动机技术,保证并网电流的低谐波畸变的同时,还可以响应电网电压/频率异常事件,并提高快充接口的惯性和阻尼,可在一定程度上提升电网的稳定性。该控制方法可降低电动汽车快充接口对电网的影响,提升电网对大规模电动汽车接入的适应性。直流接口采用隔离型DC/DC变换器,可以满足电动汽车电池快速恒功率充电的需求。在分别给出交流接口和直流接口的控制策略基础上,利用PSCAD/EMTDC仿真及一台50 kW样机实验验证了所提快充解决方案的正确性和有效性。
[Abstract]:Fast charging is a key technology for electric vehicles. Based on the control strategy of virtual synchronous motor, a grid-friendly fast charging solution for electric vehicles is proposed. The scheme consists of AC interface and DC interface. The three-phase H-bridge rectifier rectifies the power grid voltage to 600V DC voltage, and then converts the high-power DC/DC converter via DC interface to 48V DC voltage. Supply electric vehicle load. The AC interface scheme adopts virtual synchronous motor technology to ensure the low harmonic distortion of grid-connected current, at the same time, it can also respond to the abnormal voltage / frequency events of the power network, and improve the inertia and damping of the fast-charging interface. It can improve the stability of power grid to a certain extent. This control method can reduce the influence of the fast charging interface of electric vehicle on the power grid and improve the adaptability of the power grid to the large-scale electric vehicle access. The DC interface adopts isolated DC/DC converter, which can meet the requirement of fast constant power charging of electric vehicle battery. Based on the control strategies of AC interface and DC interface, the correctness and validity of the proposed fast charging solution are verified by PSCAD/EMTDC simulation and a 50kW prototype experiment.
【作者单位】：中国电力科学研究院;浙江大学电气工程学院;中国矿业大学(北京)机电与信息工程学院;北京市航天万方科技有限公司;
【基金】：国家电网公司“千人计划”专项支持项目(PD71-12-017) 国家电网公司基础性前瞻性科技项目(2014)~~
【分类号】：TM341;U469.72

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