动态电压恢复器补偿性能的优化研究

发布时间：2018-01-06 20:00

本文关键词：动态电压恢复器补偿性能的优化研究　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着经济技术的发展,电气设备受到电能质量问题的影响越来越严重。这些设备一方面对电能质量要求很苛刻,另一方面它们的使用会为电网注入新的干扰。正确地认识电能质量问题,生产优质的电能质量设备对电能问题进行校正已然成为一个急需解决的问题。在日常生活中,绝大多数的电能质量问题是动态电能质量问题,其中以电压跌落最为重要。动态电压恢复器(DVR)无论从适应能力、综合成本等经济技术角度还是国内外的实际应用情况,都是治理电压跌落的首选方案之一。论文首先针对用于低压配电网的三相四线制DVR进行了结构分析,明确了各个单元的设计思路。其次针对电容耦合型DVR补偿瞬间的谐振问题进行讨论,研究谐振产生的机理,并通过调整滤波器结构、优化补偿瞬间的控制策略和进行过电压保护的方式治理谐振问题并防止谐振造成的危害。针对采用不控整流方式供能的DVR系统,增加谐波治理功能而不增加硬件设备,实现了 DVR由单一电能质量问题治理向多元化方向发展的构想。另外,为提升DVR补偿稳定性,提出一种长时间补偿的优化补偿策略,通过设置相位跳变阈值,实现由完全补偿向同相补偿的过渡,减轻了检测单元的压力,同时使得DVR对负载的适应性增强。设计了电压跌落模拟方案,采用阻抗式电压跌落发生器实现电压跌落要求,对优化的补偿策略进行验证。通过对样机补偿性能进行优化,在实际运行中发现补偿效果有很大改善,能够满足国家标准的相关规定。
[Abstract]:With the development of economy and technology, can affect the power quality problem by electrical equipment is more and more serious. These devices on the one hand, the power quality requirements are very harsh, on the other hand they use will inject new interference for the grid. The correct understanding of power quality problems, the production of high quality power quality equipment has become a correction an urgent need to solve the problem of energy problems. In daily life, most of the power quality problems of dynamic power quality problems, the voltage drop is most important. The dynamic voltage restorer (DVR) from the angle of comprehensive adaptability, economic cost or technology at home and abroad of the actual application, all is one of the best treatment scheme of voltage sag. This paper used DVR three-phase four wire voltage distribution network were analyzed, a clear idea of the design of each unit. Secondly, capacitor The resonance coupling DVR moment of compensation are discussed, mechanism of resonance, and by adjusting the filter structure, the optimization of control strategy and the problem of compensation instantaneous overvoltage protection governance and prevent harm caused by resonance resonance. In view of the DVR system by controlling the whole flow energy supply, increase the harmonic function no additional hardware equipment, to achieve the DVR by a single power quality governance idea to diversify the direction of development. In addition, in order to improve the stability of DVR compensation, the optimization strategy proposed a long time compensation compensation, through setting the phase jump threshold, realize the transition from full compensation to the phase compensation, reduce the detection unit. The pressure, while the DVR adaptability to load increased. Designed voltage drop simulation program, using impedance voltage sag generator voltage drop, the optimization of the compensation The compensation strategy is verified. Through the optimization of the compensation performance of the prototype, the actual operation shows that the compensation effect has been greatly improved, which can meet the relevant provisions of the national standard.

【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM761.12

【相似文献】