一种新型无扰动电源快速切换装置相关技术的研究

发布时间：2018-05-30 20:40

本文选题：电压波动 + 抗晃电　；参考：《华北电力大学(北京)》2016年硕士论文

【摘要】：随着社会的进步,电网在不断的发展扩大,而电网的用电负荷性质也变得越来越复杂,同时电网受到自然环境、设备质量、人为因素等各个方面的影响,这使电网中产生电压电流波动变得不可避免。对于高新科技产业和大型化工、冶金这些有着对电能质量要求极高的运载负荷的企业,当电压出现大幅波动或者暂降时,这些用电负荷可能会停止工作,这会影响整个生产工艺流程甚至导致流程中断,给企业带来巨大损失,这就对电网供电可靠性提出了更高的要求。本文以提高电网供电可靠性,解决电压暂降导致敏感负荷停运为目的,对基于快速开关的无扰动电源切换装置进行研究,提出了一整套的无扰动电源快速切换方案,保证敏感负荷在供电电压发生波动时能正常运行不受干扰。本文通过理论分析了电压暂降发生时,电压波动对电网负荷中各个设备元件的影响,从而确定了这种新型无扰动电源快速切换装置的切换原理,并对原有的各种电源切换模式方案进行分析比较,提出了一种新的更为合理可靠的电源切换方式,使切换的负荷量最小,对备用电源的备用容量要求最低,同时能保证敏感负荷的正常运行。研究实现了一种短路故障快速识别和电压暂降快速判断的算法,并基于10kV的配电网进行了建模和仿真,当配电网中某一条支路发生故障时,对其他支路的影响进行了分析,同时模拟仿真了电源切换前与切换后的电压波形。最后通过硬件和软件平台,对无扰动电源快速切换装置进行了实现,为下一步的实际应用打下基础。
[Abstract]:With the progress of the society, the power grid is developing and expanding, and the nature of power load is becoming more and more complex. At the same time, the power network is affected by the natural environment, the quality of equipment, human factors and so on. This makes voltage and current fluctuations in the power grid inevitable. For high-tech industries and large-scale chemical industries, metallurgical enterprises with very high power quality requirements for carrying loads may stop working when the voltage fluctuates substantially or temporarily drops. This will affect the whole production process and even lead to the interruption of the process, which will bring huge losses to the enterprise, which puts forward higher requirements for the reliability of power supply in the power grid. In order to improve the reliability of power supply and solve the problem of sensitive load outage caused by voltage sag, this paper studies the switching device of undisturbed power supply based on fast switch, and puts forward a set of fast switching scheme of undisturbed power supply. Ensure that the sensitive load can not be disturbed when the supply voltage fluctuates. In this paper, the influence of voltage fluctuation on the components of power network load is analyzed theoretically, and the switching principle of this new type of fast switching device is determined. Through the analysis and comparison of the original power switching modes, a new more reasonable and reliable switching mode is proposed, which makes the switching load minimum, and the reserve capacity of the reserve power is the lowest. At the same time, it can ensure the normal operation of the sensitive load. In this paper, a fast algorithm for short circuit fault identification and voltage sag is developed, and the distribution network based on 10kV is modeled and simulated. When a branch fault occurs in the distribution network, the influence of other branches is analyzed. At the same time, the voltage waveforms before and after switching are simulated. Finally, through the hardware and software platform, the fast switching device of the undisturbed power supply is realized, which lays the foundation for the practical application in the next step.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM76

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