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首页> 外文期刊>Power Electronics, IET >High-performance unified power quality conditioner using non-linear sliding mode and new switching dynamics control strategy
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High-performance unified power quality conditioner using non-linear sliding mode and new switching dynamics control strategy

机译：采用非线性滑模和新型开关动力学控制策略的高性能统一电能质量调节器

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摘要

In this study, a non-linear sliding mode control (NLSMC) and new switching dynamics control strategy have been proposed for a unified power quality conditioner (UPQC) to improve the power quality problem in power system distribution network. The proposed non-linear sliding surface reflects the controlling action of the DC-link capacitor voltage with a variation of the system's damping ratio and permits the DC-link voltage to obtain a low overshoot and small settling time. This NLSMC technique combines with a novel synchronous-reference frame (SRF) control technique for generation of a rapid and stable reference signal for both shunt and series converters. A new switching dynamics control strategy has been designed for the voltage source converters of UPQC and this design helps in the reduction of band violation of the hysteresis band as well as improvement in the tracking behaviour of UPQC during grid perturbations. Consequently, NLSMC-SRF technique along with new switching strategy in UPQC provides an effective compensator for voltage/current harmonics, sag/swell, voltage unbalance and interruptions. The proposed control strategy of UPQC is validated through MATLAB/SIMULINK, followed by the experimental system using real-time hardware-in-the-loop. Adequate results are reported after a comparative assessment with the conventional proportional-integral and hysteresis controller.
机译：在这项研究中，提出了一种非线性滑模控制（NLSMC）和新的开关动力学控制策略，用于统一电能质量调节器（UPQC），以改善电力系统配电网中的电能质量问题。所提出的非线性滑动表面反映了DC链路电容器电压的控制作用，随系统阻尼比的变化而变化，并允许DC链路电压获得较低的过冲和较小的建立时间。这种NLSMC技术与新颖的同步参考帧（SRF）控制技术相结合，可为并联和串联转换器生成快速，稳定的参考信号。已经为UPQC的电压源转换器设计了一种新的开关动力学控制策略，该设计有助于减少磁滞带的带宽违规，并改善电网扰动期间UPQC的跟踪行为。因此，NLSMC-SRF技术以及UPQC中的新开关策略为电压/电流谐波，骤降/骤升，电压不平衡和中断提供了有效的补偿器。通过MATLAB / SIMULINK验证了所提出的UPQC控制策略，然后使用实时硬件在环实验系统。与常规比例积分和磁滞控制器进行比较评估后，报告了足够的结果。

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