【作者】 孙冲；

【导师】 陈劲操；

【作者基本信息】 南京理工大学 ， 电力电子与电力传动， 2008， 硕士

【摘要】 对静止无功补偿装置进行了研究,并就固体交流开关投切电容器补偿装置展开深入讨论,给出了基于IGBT的电容器投切补偿装置的设计方案,实现对电力系统的静止无功补偿。首先研究了的固体交流开关投切电容器的基本原理,包括接线方式,无功电流检测方法,投切电容时刻的选择等。设计了基于嵌入式操作系统Windows CE,以IGBT做交流开关的电容器投切补偿装置的软硬件系统。WinCE操作系统是应用于嵌入式系统的实时操作系统,具有高可靠性,高实时性,高稳定性的特点,通过对其剪裁和定制其核心可以做到仅需500kB的ROM和250kB的RAM,可应用于不同的嵌入式芯片,有利于静止无功补偿装置的稳定运行和对于软硬件资源的合理调度。基于IGBT的交流开关能够改善投切电容器装置的开关特性和可控性,有利于提高其补偿性能。基于上述软硬件系统,设计了基于IGBT的电容器投切补偿装置的实验装置,并对其性能进行了实验分析。其中包括电网电压电流的数据采集和无功参数的计算实验,Windows CE操作系统的定制和应用程序的开发实验以及补偿装置的任意电容残压投切实验、响应命令速度实验和补偿装置的补偿性能实验。通过实验证明,设计的基于IGBT的电容器投切补偿装置能够实现补偿电力系统无功功率的作用,并且在可操作性、可控性,响应命令速度方面与传统的晶闸管投切电容器相比有优势。更多还原

【Abstract】 Static var compensator(SVC) is studied in this paper, especially on thyristor switched capacitor(TSC), and a scheme of the device that switchs capacitor to compensate var based on IGBT is proposed to compensate static var for power system.First the theory of TSC is studied, including connection model, the method to detect var current, how to select the timing to switch capacitor, and so on. A system of the device that switch capacitor to compensate var and has AC switch based IGBT including software and hardware is designed, based on Windows CE operating system. WinCE is a real time operating system for embedded system, that has many tools to develop graphical interfaces, and its core can be reduced to 500kB ROM and 250kB RAM by customizing, that can be used in many embedded chips. It is propitious to develop interfaces for SVC. Switching and controlling performance can be improved by AC switch based IGBT.With the system designed above, the experimental device that switch capacitor to compensate var based on IGBT is developed in this paper. And various kinds of characteristic are experimented, including voltage and current data sampling of power system, var parameter computing, WinCE operating system customizing and application developing, and performance of compensator such as capacitor switching at random rudimental capacitor voltage, speed of answering control command, and so on.It is proved by the experiment that the device that switch capacitor based on IGBT designed in the paper can compensate power system var properly, and has advantage on operating and controlling performance, and the speed of answering control command over TSC.更多还原