摘要
针对电动汽车向电网馈送能量(V2G)时,车载并网逆变器与电网之间的交互作用引起的并网逆变器不稳定和电能质量问题,首先采用基于阻抗的稳定分析方法研究电动汽车并网逆变器与配电网之间的交互作用;其次根据阻抗比奈奎斯特判据分析配电网阻抗对并网逆变器稳定性的影响,采用谐波线性化方法建立考虑锁相环的单相LCL型并网逆变器小信号阻抗模型,并提出一种基于电压前馈的并网逆变器自适应相位补偿控制策略,以便确保其具有足够的稳定裕度。最后通过仿真验证了所提控制策略的有效性。
Aiming at the instability of grid-connected inverter and the problem of power quality caused by the interaction between grid-connected inverter and power grid in the process of using Vehicle-to-Grid (V2G) technology, a stability analysis method based on impedance is used to study the interaction be-tween the grid-connected inverter of electric vehicles and the distribution network. Then, qualitative a- nalysis of the influence of grid impedance on the stability of grid-connected inverter was completed ac-cording to the impedance ratio Nyquist criterion. A small signal impedance model of single-phase LCL grid-connected inverter with phase-locked loop was established by harmonic linearization method and an adaptive phase compensation control strategy based on voltage feedforward was proposed to ensure the sta-bility margin of grid-connected inverter. Finally, the effectiveness of the proposed control strategy is veri-fied by simulation.
作者
宋绍剑
刘延扬
刘斌
宋春宁
SONG Shao-jian;LIU Yan-yang;LIU Bin;SONG Chun-ning(School of Electrical Engineering,Guangxi University,Nanning 530004,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2019年第4期111-119,共9页
Electric Machines and Control
基金
国家自然科学基金(51767005)
广西自然科学基金(2016GXNSFAA380327)
关键词
电动汽车
并网逆变器
阻抗
稳定分析
电压前馈控制
electric vehicle
grid-connected inverter
impedance
stability analysis
voltage feed-forward control
