【作者】 曹伟；

【导师】 吴爱国； 邹志慧；

【作者基本信息】 天津大学 ， 控制工程， 2011， 硕士

【摘要】 随着社会的发展,绿色能源和生态环境越来越多的受到人们的关注。微电网可以整合风力发电、光伏发电等多种可再生能源发电单元。但微网中出现的电压暂降、瞬时停电等电能质量问题会严重影响微电网的稳定运行。同时微网条件下还面临着由于非线性负荷的大量使用所引起的谐波电流等电能质量问题。本文提出了一种用于改善微网条件下的电能质量问题的补偿装置设计方案。它在有源电力滤波器的基础上增加了超级电容储能元件,实现了多功能化的要求,使该装置在有效地解决谐波和无功电流补偿的同时,也能解决电压跌落、短时停电等电能质量问题。本文系统地阐述了该装置各组成部分的作用和工作原理。提出了基于单相电路瞬时功率理论的谐波电流检测方法,该方法计算量小,运算速度快。对微网中出现的电压暂降等电压质量问题,论文对电压暂降补偿过程进行了分析。最后仿真结果表明,该装置可以有效地解决微网中存在的多种电能质量问题。更多还原

【Abstract】 With the social and economic development, there is a growing foucus on green energy and the environment, able to integrate wind power,solar power and other renewable energy power generation came into the microgrid. Voltage dips, transient power quality problems such as power generators for only a few microgrid is very serious. Same piconet is facing due to extensive use of nonlinear loads such as harmonic currents caused by power quality problems. This paper presents a micro-network for improving power quality problems under the conditions of design of the device. It is in APF based on the increase super capacitor energy storage system, implements the requirements of multi-functional, so that the device effectively solve the harmonic and reactive power compensation at the same time, can solve the voltage drop, voltage fluctuation and flicker, short-term power outages and other power quality problems.This paper systematically describes the working principle and the components of the device, a new harmonic and reactive current detection method, compared to the traditional reactive power based on the harmonic and reactive current detection method, this method computation load is small,the operating speed is quick.. The voltage which appears to microgrid in falls and so on voltage quality questions temporarily, the paper has carried on the analysis to the compensation process, has obtained the smallest injection current which the installment needs and pours into the capacity. Finally the simulation result indicated that this equipment may solve the electrical energy quality problem which effectively in microgrid exists更多还原