基于模糊控制超电容的DVR (UCAP-DVR)提高电能质量

R. Bhavani, N. Prabha
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引用次数: 3

摘要

近年来,随着智能电网的出现,各种储能技术的成本迅速下降,并网成为现实。动态电压恢复器(DVR)是一种定制的电力设备,具有优异的动态性能,用于配电系统中电压暂降、膨胀补偿。在储能器件中,超级电容器(UCAP)具有补偿电压跌落和膨胀所必需的高功率和低能量密度等理想特性,需要在短时间间隔内提供高功率。提出了一种可充电UCAP与DVR的集成方案。该UCAP-DVR采用模块化、灵活的系统配置,具有有源功率能力,并可为电能质量问题提供深度、扩展的缓解。DVR通过双向DC-DC转换器集成到UCAP中,该转换器支持DVR的刚性直流链路电压,并有助于补偿暂时的电压下降和膨胀。采用模糊逻辑控制器来提高UCAP-DVR的性能。在matlab - lab中建立了该系统的仿真模型,并与传统DVR的性能进行了比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fuzzy Controlled Ultra-Capacitor Based DVR (UCAP-DVR) for Power Quality Enhancement
In recent years, a rapid decrease in the cost of various energy storage technologies and their integration into grid becomes a reality with the advent of smart grid. The Dynamic Voltage Restorer (DVR) is a custom power device that has an excellent dynamic capability used to provide voltage sag, swell compensation in distribution systems. Among the energy storage devices, Ultra-Capacitors (UCAP) have ideal characteristics such as high power and low energy density essential for the compensation of voltage sag and swell, which require high power for short interval of time. This paper presents an integration of rechargeable UCAP with DVR. This UCAP-DVR presents a modular, flexible system configuration that will have an active power capability and also provide deep, extended mitigation for power quality problems. The DVR is integrated into UCAP via bidirectional DC-DC converter which supports a rigid dc-link voltage for DVR and also helps in compensating temporary voltage sag and swell. FUZZY LOGIC Controller is used to enhance the performance of UCAP-DVR. The simulation model for the proposed system has been developed in MAT-LAB and the performance over conventional DVR is compared with the results obtained.
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