电气弹簧的理论分析及在无功补偿中的仿真应用

发布时间：2018-05-04 16:09

本文选题：可再生能源 + 电压稳定　；参考：《上海电机学院》2017年硕士论文

【摘要】：可再生能源发电间歇性、不可预测性的特点会导致电网电压产生波动和闪变的现象发生,使电网受到严重的无功干扰,更甚者,会导致电网失稳。为了解决这类问题,目前应用最为广泛的技术是无功补偿技术,该技术能够改善功率因数,巩固电力系统稳定性,但该技术无法调节有功功率;装设储能装置能够抵消电网电压波动,较好地缓解电力系统压力,但一次性购置成本较高。此外,电池处理还会导致环境污染等问题。为弥补现有技术的不足,本文研究了一种新型电力电子技术——电气弹簧(Electric Springs,简称ES),该技术不仅能够调节无功功率和有功功率,而且能够降低装置容量需求,减少成本。本文第一章介绍了ES的研究背景与意义,重点分析了目前常用稳压技术的利弊,并引出ES技术的发展趋势和前景。第二章通过对比分析传统机械弹簧与ES的工作原理,研究了ES理论分析,并同时探讨了电网中非关键负载比重对ES的局限性影响。第三章在对电网电压扰动分析的背景下,介绍了ES所实现的无功补偿原理,并针对拓扑结构容易引发谐波的缺点,提出了优化方案。第四章基于PI控制器对ES幅值和相位进行的双闭环调控,结合ES的理论分析和工程经验对其参数进行了整定,并通过使用MATLAB/SIMULINK仿真平台构建了ES在无功补偿应用上的仿真拓扑。仿真数据表明,ES对波动的电网具有良好的稳压效果以及动态无功补偿效果。
[Abstract]:The characteristics of intermittent and unpredictability of renewable energy generation will lead to the fluctuation and flicker of power grid voltage, which will lead to serious reactive power disturbance and, worse, the instability of power grid. In order to solve these problems, the most widely used technology is reactive power compensation, which can improve the power factor and consolidate the stability of power system, but it can not adjust the active power. The installation of energy storage device can offset the voltage fluctuation of power system and relieve the pressure of power system, but the one-time purchase cost is higher. In addition, battery treatment will also lead to environmental pollution and other problems. In order to make up for the shortcomings of the prior art, a new type of power electronics technology, Electric Spring (ESN), is studied in this paper. This technology can not only adjust reactive power and active power, but also reduce the demand of device capacity and cost. In the first chapter, the research background and significance of es are introduced, the advantages and disadvantages of current voltage stabilizing technology are analyzed, and the development trend and prospect of es technology are introduced. In the second chapter, by comparing and analyzing the working principle of traditional mechanical spring and es, the theory of es is studied, and the influence of non-critical load proportion on es is discussed at the same time. In the third chapter, under the background of voltage disturbance analysis, the reactive power compensation principle realized by es is introduced, and the optimization scheme is proposed to solve the problem that topology is easy to cause harmonics. In chapter 4, based on the double closed loop control of the amplitude and phase of es by Pi controller, the parameters of es are adjusted based on the theoretical analysis and engineering experience of es, and the simulation topology of es in reactive power compensation is constructed by using MATLAB/SIMULINK simulation platform. The simulation data show that the power system has good voltage stabilization effect and dynamic reactive power compensation effect.
【学位授予单位】：上海电机学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM714.3

【参考文献】