基于无源控制的零磁通故障电流限制器的研究

发布时间：2019-02-17 19:27

【摘要】：随着我国经济的持续发展,电力系统也在不断地升级,电力网络规模也越来越大。随着新能源技术的不断发展,风力发电、光伏发电以及核电等新能源的并网,分布式电源的增加,使电网短路电流水平大大增加。电网发生短路故障时,短路电流对电力网络中的一次设备、二次设备都会产生严重危害。而故障电流限制器(FCL)的出现和发展则为限制短路电流提供了有效的手段。本文首先对故障电流限制器的研究现状进行了简要叙述,之后对零磁通故障电流限制器的基本原理进行了介绍和分析,建立了零磁通故障电流限制器的数学模型,在逆变器控制方面采用矢量控制的方法进行控制,与电流滞环控制方式相比,具有输出偏差小的优点。在零磁通故障电流限制器数学模型基础上,利用了无源性控制理论对逆变器的控制器进行了设计,并得到了控制指令,在电流跟踪方面获得了更好的跟踪效果。基于无源性控制方法建立了零磁通故障电流限制器的仿真模型,并进行了仿真分析。最后以DSP TMS320F28335控制芯片作为控制核心搭建硬件电路实验平台,形成完整的闭环系统,并进行了硬件电路实验,验证了零磁通故障电流限制器的限流作用以及无源性控制理论应用于逆变器控制获得的良好的动态响应性能。
[Abstract]:With the continuous development of our economy, the electric power system is constantly upgraded, and the scale of power network is becoming larger and larger. With the development of new energy technology, the grid connection of wind power, photovoltaic power and nuclear power, and the increase of distributed generation, make the level of short-circuit current increase greatly. When a short circuit fault occurs in the power network, the short circuit current will cause serious harm to the primary equipment and the secondary equipment in the power network. The emergence and development of fault current limiter (FCL) provides an effective means to limit short circuit current. In this paper, the research status of fault current limiter is briefly described, then the basic principle of zero flux fault current limiter is introduced and analyzed, and the mathematical model of zero flux fault current limiter is established. In the aspect of inverter control, vector control is used to control the inverter. Compared with the current hysteresis control, it has the advantage of small output deviation. Based on the mathematical model of zero flux fault current limiter, the controller of inverter is designed by using passive control theory, and the control instruction is obtained, and better tracking effect is obtained in current tracking. The simulation model of zero flux fault current limiter is established based on passive control method, and the simulation analysis is carried out. Finally, the DSP TMS320F28335 control chip is used as the control core to build the hardware circuit experiment platform to form a complete closed-loop system, and the hardware circuit experiment is carried out. The current limiting effect of zero flux fault current limiter and the good dynamic response performance of passive control theory applied to inverter control are verified.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM471

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