矿热炉混合投切电容型静止无功补偿系统研究

发布时间：2018-05-07 15:41

本文选题：矿热炉 + 无功补偿　；参考：《长沙理工大学》2014年硕士论文

【摘要】：工业矿热炉是典型的高耗能非线性用户,其在工作过程不仅需要吸收大量的无功功率,还且会产生严重的谐波、电压波动和三相不平衡等多种电能质量扰动污染。随着节能减排和电能质量日益受到重视,矿热炉用户和供电部门越来越关注高性价比的无功补偿装置的开发和使用。混合投切电容型静止无功补偿系统,充分发挥了电容器无功补偿的经济优势、固态开关投切的动态特性优势和机械开关投切的低损耗优势,是一种高效能矿热炉无功补偿装置,近年来成为矿热炉无功补偿的研究热点。本文针对矿热炉无功补偿的矿热炉混合投切电容型静止无功补偿系统所涉及的理论和技术问题开展研究,具有重要的理论意义和实际应用价值。本文首先阐述了矿热炉工作原理特性及无功补偿技术的发展现状和趋势,分析了矿热炉供电系统的物理结构和电气特性,建立起了矿热炉供电系统各组成部分的电气模型。然后,研究了无功补偿总容量计算的功率因数法、无功电压法、改进匹配注入流算法和经济优化法,探索了MSC、RSC、TSC的容量优化分配方法。在控制方法上,采用改进型九区图控制,使得电容器投切与矿热炉变压器之间的调节更为合理。接着探讨了机械投切电容器(MSC)、复合投切电容器(RSC)与晶闸管投切电容器(TSC)组成的混合投切电容型静止无功补偿系统的主电路物理结构和工作原理,研究了基于瞬时无功功率理论的ip-iq信号检测方法。最后,运用MATLAB仿真软件进行了混合投切电容型静止无功补偿系统工作原理仿真、信号检测和控制策略仿真,并进行了低压混合投切电容型静止无功补偿系统的主电路设计和控制器设计,在主电路设计方面,详细分析了电容器、机械开关、固态开关、电抗器的选型和参数匹配的基本规律,在控制器设计方面,深入研究了基于STM32F407VGT6芯片的控制器硬件电路设计和软件开发。本文所设计的低压混合投切电容型静止无功补偿系统在云南某冶炼厂的矿热炉无功补偿中得到了成功应用。理论研究、仿真结果和混合投切电容型静止无功补偿系统的实际应用表明本论文研究的混合投切电容型静止无功补偿系统是一种性价比优越的无功补偿装置。
[Abstract]:Industrial thermal furnace is a typical nonlinear user with high energy consumption. It not only needs to absorb a large amount of reactive power, but also produces many kinds of power quality disturbance pollution, such as serious harmonic wave, voltage fluctuation and three-phase imbalance. With the increasing attention to energy saving and emission reduction and power quality, users and power supply departments pay more and more attention to the development and use of reactive power compensation devices with high performance and price ratio. The hybrid switching capacitive static reactive power compensation system is a kind of high efficiency reactive power compensation device for mine heat furnace, which brings into full play the economic advantage of capacitor reactive power compensation, the advantage of dynamic characteristics of solid state switch switching and the low loss advantage of mechanical switch switching. In recent years, it has become a hot spot in the research of reactive power compensation. In this paper, the theoretical and technical problems involved in the hybrid switching capacitive static Var compensation system for mine heating furnace are studied, which has important theoretical significance and practical application value. In this paper, the working principle and the development trend of reactive power compensation technology are described. The physical structure and electrical characteristics of the power supply system are analyzed, and the electrical model of each component of the power supply system is established. Then, the power factor method, reactive power voltage method, improved matching injection flow algorithm and economic optimization method for calculating the total capacity of reactive power compensation are studied. In the control method, the adjustment between capacitor switching and mine furnace transformer is more reasonable by using the improved nine block diagram control. Then the main circuit physical structure and working principle of the hybrid switching capacitive static var compensation system composed of mechanical switched capacitor (MSCC), compound switch capacitor (RSC-C) and thyristor switch capacitor (TSC-TSC-TSC) are discussed. The detection method of ip-iq signal based on instantaneous reactive power theory is studied. Finally, MATLAB simulation software is used to simulate the working principle, signal detection and control strategy of hybrid switched capacitor static Var compensation system. The main circuit design and controller design of low-voltage hybrid switched capacitor static Var compensation system are carried out. In the main circuit design, the capacitors, mechanical switches and solid-state switches are analyzed in detail. In the design of controller, the hardware circuit design and software development of controller based on STM32F407VGT6 chip are deeply studied. The static Var compensation system with low voltage mixed switching capacitor designed in this paper has been successfully applied in the reactive power compensation of a smelting plant in Yunnan province. The theoretical research, simulation results and the practical application of the hybrid switching capacitor static var compensation system show that the hybrid switched capacitor static Var compensation system studied in this paper is a kind of superior reactive power compensation device with high performance and price ratio.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM714.3

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