基于SVG补偿装置的低压配电网无功谐波综合治理
发布时间：2018-11-26 20:23
【摘要】：当今的社会在高度发展,社会变化是日新月异,因此低压配电网中的负荷情况越来越复杂。小作坊的兴起、大量电力电子设备器件的使用,会使配电网中出现大量的谐波电流、无功不足、零序电流和三相不平衡的情况。这些情况越来越严重,给配电网的可靠运行和电能质量带来了巨大的危害。在人们生活生平不断提高的今天,对生活质量的要求也在提高,因此对电能质量的要求也在提高。针对上面的情况,本文基于静止无功发生器(SVG)的无功补偿技术,在满足低压三相四线制配电网经济运行的条件下,对低压配电系统的无功补偿策略进行了研究。在补偿结果的分析中,本文基于MATLAB/Simulink建立一个负载中含有谐波、零序电流和三相不平衡的负载仿真模型,仿真的结果分析证明本文所设计的SVG对低压三相四线制配电网的综合治理具有良好的效果,经过SVG的补偿后系统中谐波数量减少,零序电流基本趋近于零,三相不平衡问的也得到了明显的改善,功率因数也得到了提高。本文的具体工作的如下:(1)在阅读大量的文献基础上,熟悉SVG的基本工作原理,利用SVG治理低压配电网并且建立了 SVG在低压三相四线制配电系统中的数学模型。(2)考虑到低压配电网的负荷情况,接下来对SVG的补偿策略和电流检测环节进行了研究,使SVG适应于低压配电网的环境,满足条件,取代以往的补偿设备。(3)依据大量的理论研究,本文基于MATLAB/Simulink建立一个SVG补偿低压三相四线制配电网的补偿系统,通过对仿真结果的分析验证了 SVG补偿系统对低压三相四线制的综合治理取得了预期的效果。
[Abstract]:Today's society is highly developed, social changes are changing with each passing day, so the load situation in the low voltage distribution network is becoming more and more complex. The rise of small workshops and the use of a large number of power electronic devices will lead to a large number of harmonic currents, reactive power shortages, zero-sequence currents and three-phase imbalances in the distribution network. These situations are becoming more and more serious, which brings great harm to the reliable operation and power quality of distribution network. With the improvement of people's life and life, the requirement of quality of life is also improving, so the requirement of power quality is also improving. In view of the above situation, the reactive power compensation strategy of low voltage distribution system is studied in this paper based on the reactive power compensation technology of static Var Generator (SVG) under the condition of satisfying the economical operation of low voltage three-phase four-wire distribution network. In the analysis of compensation results, a load simulation model with harmonic, zero-sequence current and three-phase unbalance is established based on MATLAB/Simulink. The simulation results show that the SVG designed in this paper has a good effect on the comprehensive treatment of low voltage three-phase four-wire distribution network. After the compensation of SVG, the number of harmonics in the system is reduced, and the zero-sequence current approaches to zero. The three-phase imbalance problem has also been obviously improved, and the power factor has also been improved. The specific work of this paper is as follows: (1) on the basis of reading a lot of literature, I am familiar with the basic working principle of SVG. The mathematical model of SVG in low voltage three-phase four-wire distribution system is established by using SVG. (2) considering the load of low-voltage distribution network, the compensation strategy and current detection of SVG are studied. Make SVG adapt to the environment of low voltage distribution network, satisfy the condition, replace the former compensation equipment. (3) based on a lot of theoretical research, this paper establishes a compensation system of SVG compensation low voltage three-phase four-wire distribution network based on MATLAB/Simulink. The simulation results show that the SVG compensation system has achieved the desired effect on the integrated treatment of low voltage three-phase four-wire system.
【学位授予单位】：沈阳农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM761.12
，
本文编号：2359537
[Abstract]:Today's society is highly developed, social changes are changing with each passing day, so the load situation in the low voltage distribution network is becoming more and more complex. The rise of small workshops and the use of a large number of power electronic devices will lead to a large number of harmonic currents, reactive power shortages, zero-sequence currents and three-phase imbalances in the distribution network. These situations are becoming more and more serious, which brings great harm to the reliable operation and power quality of distribution network. With the improvement of people's life and life, the requirement of quality of life is also improving, so the requirement of power quality is also improving. In view of the above situation, the reactive power compensation strategy of low voltage distribution system is studied in this paper based on the reactive power compensation technology of static Var Generator (SVG) under the condition of satisfying the economical operation of low voltage three-phase four-wire distribution network. In the analysis of compensation results, a load simulation model with harmonic, zero-sequence current and three-phase unbalance is established based on MATLAB/Simulink. The simulation results show that the SVG designed in this paper has a good effect on the comprehensive treatment of low voltage three-phase four-wire distribution network. After the compensation of SVG, the number of harmonics in the system is reduced, and the zero-sequence current approaches to zero. The three-phase imbalance problem has also been obviously improved, and the power factor has also been improved. The specific work of this paper is as follows: (1) on the basis of reading a lot of literature, I am familiar with the basic working principle of SVG. The mathematical model of SVG in low voltage three-phase four-wire distribution system is established by using SVG. (2) considering the load of low-voltage distribution network, the compensation strategy and current detection of SVG are studied. Make SVG adapt to the environment of low voltage distribution network, satisfy the condition, replace the former compensation equipment. (3) based on a lot of theoretical research, this paper establishes a compensation system of SVG compensation low voltage three-phase four-wire distribution network based on MATLAB/Simulink. The simulation results show that the SVG compensation system has achieved the desired effect on the integrated treatment of low voltage three-phase four-wire system.
【学位授予单位】：沈阳农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM761.12
，
本文编号：2359537
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