A Unified Control of Grid-Interactive Off-Board EV Battery Charger with Improved Power Quality
A Unified Control of Grid-Interactive Off-Board EV Battery Charger with Improved Power Quality
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电网交互式非车载电动汽车电池充电器的统一控制，提高电能质量
DOI：
10.1109/tte.2022.3172354
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发表时间：
2022
影响因子：
7
通讯作者：
Nishit Tiwary
中科院分区：
文献类型：
--
作者：
R. Lenka;A. Panda;Ashish Ranjan Dash;Laxmidhar Senapati;Nishit Tiwary
本文提出了一种自校正滤波器（STF）和滑模控制（SMC）的控制算法的电网交互式离板电动汽车（EV）电池充电器，以供电的EV电池，同时提高电网的电能质量。在并网运行时，充电器采用基于STF的控制策略来估计基波负载电流和同步电压模板以产生纯正弦参考电流。与锁相环（PLL）和二阶广义积分器（SOGI）相比，基于STF的技术在非理想电网电压条件下精确地估计同步电压模板。因此，在GCO中，充电器参考电流确保电网到车辆/车辆到电网（G2 V/V2 G）操作模式中的单位功率因数和电网充电器（C4 G）操作模式中的无谐波电网电流。此外，充电器在电网中断期间以车辆到负载（V2 L）操作模式操作，以维持对住宅负载的不间断供应。控制算法还包括电网同步技术，以实现GCO和V2 L之间的平滑过渡。此外，提出了一种基于SMC的直流母线电压控制器（SMC-DLVC），以减少直流母线电压过冲与有限时间收敛在所有操作模式下的外部干扰。所提出的控制算法的性能进行了验证，在12.6千伏安的离板充电器实验室原型在理想/非理想电网电压条件下。
This paper presents a self-tuning filter (STF) and sliding mode control (SMC) based control algorithm for a grid-interactive off-board electric vehicle (EV) battery charger to power the EV batteries and simultaneously improve the grid power quality. In grid-connected operation (GCO), the charger uses the STF based control strategy to estimate the fundamental load current and synchronizing voltage templates to generate a pure sinusoidal reference current. Compared to phase-locked-loop (PLL) and second-order generalized integrator (SOGI), the STF based technique precisely estimates the synchronizing voltage templates during nonideal grid voltage conditions. Therefore in GCO, the charger reference current ensures unit power factor in grid-to-vehicle/vehicle-to-grid (G2V/V2G) operation mode and harmonic free grid current in charger-for-grid (C4G) operation mode. Furthermore, the charger operates in vehicle-to-load (V2L) operation mode during grid outages to maintain an uninterrupted supply to the residential load. The control algorithm also includes a grid synchronization technique to achieve a smooth transition between GCO and V2L. Furthermore, an SMC-based DC-link voltage controller (SMC-DLVC) is proposed to reduce DC-link voltage overshoot with finite-time convergence during external disturbances in all operation modes. The performance of the proposed control algorithm is validated in a 12.6 kVA off-board charger laboratory prototype under ideal/nonideal grid voltage conditions.