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首页> 外文会议>2015 International Conference on Energy Systems and Applications >Different control schemes for power quality improvement using embedded Z source based Dynamic Voltage Restorer
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Different control schemes for power quality improvement using embedded Z source based Dynamic Voltage Restorer

机译：使用基于嵌入式Z源的动态电压恢复器改善电能质量的不同控制方案

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摘要

There is a need for instant mitigation of voltage sag/swell to maintain the load voltage constant since voltage sag and swell is most common problem customers are facing repeatedly. To restore the voltage sag induced due to fault or sudden load imposed on the system, the device is used to mitigate voltage dynamically is called ¿¿¿Dynamic Voltage Restorer.¿¿¿ Generally DVR is connected to grid through Voltage Source Inverter (VSI) or Current Source Inverter (CSI) which has certain demerits like problem of limited output voltage (below dc link voltage), restriction on switching of upper and lower switches simultaneously and requirement of filter to give sinusoidal output. All these complications get discarded if embedded EZ-source inverter is used. This paper presents two different control strategies for DVR based on EZ source inverter such as SRF (feed forward) control technique and PQ theory for series compensation along with its MATLAB simulation and results. The result shows the comparison between these two control strategies.
机译：由于电压骤降和骤升是客户反复面对的最普遍的问题，因此需要立即减轻电压骤降/骤升以保持负载电压恒定。为了恢复由于故障或突然施加在系统上而引起的电压骤降，该设备用于动态减轻电压，称为“动态电压恢复器”。通常，DVR通过电压源逆变器（VSI）连接到电网。或具有某些缺点的电流源逆变器（CSI），例如输出电压受限（低于直流母线电压），同时限制上下开关的切换以及要求滤波器提供正弦输出的问题。如果使用嵌入式EZ源逆变器，则所有这些复杂性都会被消除。本文介绍了基于EZ源逆变器的DVR的两种不同控制策略，例如SRF（前馈）控制技术和用于串联补偿的PQ理论以及其MATLAB仿真和结果。结果显示了这两种控制策略之间的比较。

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