H桥级联型静止无功发生器SVG的研究
发布时间：2018-12-28 11:23
【摘要】：近年来，随着电力电子装置的快速发展，电网中出现了越来越多无功和谐波，使得电网受到频繁的冲击，电能质量严重降低。快速地进行就地无功补偿对提高系统功率因数，提高电网稳定性具有重要的现实意义。静止同步无功发生器（SVG）因其有着优良控制算法与满意的补偿效果吸引了越来越多的人的关注。本文针对高压电力网中存在无功问题，研究并设计了适合于高压领域的H桥级联型静止无功发生器SVG。 本文首先简要地介绍了电力系统中无功补偿的背景、发展现状，同时介绍了SVG主电路的结构特点、工作原理，并建立了SVG的数学模型。并据此模型给出控制方法，以瞬时无功功率理论为基础，，利用坐标变换计算无功电流，并采用电压电流双闭环控制；接着对载波调制技术作了分析，并在此基础上选择了双极性PS-SPWM调制方法；其次对H桥级联型SVG装置直流侧电容电压如何控制做了详细地分析，本文采取了分层控制方法，该方法算法简单，实现方便，调节效果明显。 利用MATLAB软件对系统作了仿真验证，搭建了6个H桥级联的SVG仿真模型，在电网平衡情况下与不平衡情况下分别作了仿真验证；最后以数字信号处理器DSP(TMS320F2812)+FPGA为基础对H桥级联型SVG控制系统进行了硬件设计和软件设计，同时搭建了6H桥级联SVG的实验平台，进一步验证本文设计方法能够很好补偿系统中的无功电流。
[Abstract]:In recent years, with the rapid development of power electronic devices, more and more reactive power and harmonics appear in the power network, which makes the power network under frequent impact, and the power quality is seriously reduced. Rapid local reactive power compensation is of great practical significance to improve the power factor of the system and improve the stability of the power system. The static synchronous Var Generator (SVG) has attracted more and more attention because of its excellent control algorithm and satisfactory compensation effect. In this paper, aiming at the reactive power problem in high voltage power network, the H bridge cascade static Var Generator (SVG.) suitable for high voltage field is studied and designed. In this paper, the background and development of reactive power compensation in power system are briefly introduced, and the structure and working principle of SVG main circuit are introduced, and the mathematical model of SVG is established. Based on the theory of instantaneous reactive power, the reactive current is calculated by coordinate transformation, and the voltage and current are controlled by double closed loop. Secondly, the carrier modulation technology is analyzed, and the bipolar PS-SPWM modulation method is chosen on this basis. Secondly, how to control the DC side capacitance voltage of H-bridge cascade SVG device is analyzed in detail. The layered control method is adopted in this paper. The method is simple, easy to realize and has obvious regulating effect. MATLAB software is used to verify the system and six SVG simulation models of H bridge cascades are built. The simulation results are verified under the condition of power network balance and unbalance respectively. Finally, based on the digital signal processor DSP (TMS320F2812) FPGA, the hardware design and software design of H-bridge cascaded SVG control system are carried out. At the same time, the experimental platform of 6H-bridge cascade SVG is built. It is further verified that the design method can compensate the reactive current in the system well.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761.12
本文编号：2393870
[Abstract]:In recent years, with the rapid development of power electronic devices, more and more reactive power and harmonics appear in the power network, which makes the power network under frequent impact, and the power quality is seriously reduced. Rapid local reactive power compensation is of great practical significance to improve the power factor of the system and improve the stability of the power system. The static synchronous Var Generator (SVG) has attracted more and more attention because of its excellent control algorithm and satisfactory compensation effect. In this paper, aiming at the reactive power problem in high voltage power network, the H bridge cascade static Var Generator (SVG.) suitable for high voltage field is studied and designed. In this paper, the background and development of reactive power compensation in power system are briefly introduced, and the structure and working principle of SVG main circuit are introduced, and the mathematical model of SVG is established. Based on the theory of instantaneous reactive power, the reactive current is calculated by coordinate transformation, and the voltage and current are controlled by double closed loop. Secondly, the carrier modulation technology is analyzed, and the bipolar PS-SPWM modulation method is chosen on this basis. Secondly, how to control the DC side capacitance voltage of H-bridge cascade SVG device is analyzed in detail. The layered control method is adopted in this paper. The method is simple, easy to realize and has obvious regulating effect. MATLAB software is used to verify the system and six SVG simulation models of H bridge cascades are built. The simulation results are verified under the condition of power network balance and unbalance respectively. Finally, based on the digital signal processor DSP (TMS320F2812) FPGA, the hardware design and software design of H-bridge cascaded SVG control system are carried out. At the same time, the experimental platform of 6H-bridge cascade SVG is built. It is further verified that the design method can compensate the reactive current in the system well.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761.12
【引证文献】
相关期刊论文 前1条
1 赵萌萌;江新峰;胡琴洪;龚晓伟;牛高远;;SVG在光伏电站无功补偿中的应用[J];电力电容器与无功补偿;2016年03期
相关硕士学位论文 前5条
1 关磊;链式STATCOM控制策略研究[D];安徽大学;2017年
2 吴林峰;配电网无功补偿系统的研究[D];安徽理工大学;2016年
3 陈杏灿;TSC无功补偿异步投切中涌流控制的研究与设计[D];广东工业大学;2016年
4 李现周;静止无功发生器的仿真研究[D];郑州大学;2016年
5 许敏敏;级联H桥SVG无功补偿控制策略研究[D];太原科技大学;2016年
本文编号：2393870
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