用于电力系统短路限流器的辅助电源系统研究

【作者】 文辉清；

【导师】 吕征宇；

【作者基本信息】 浙江大学 ， 电力电子与电力传动， 2006， 硕士

【摘要】 电力电子技术最重要的应用领域之一是电力系统,短路限流器就是综合利用了电力电子器件、拓扑结构、DSP控制及磁特性等达到能及时限制短路电流目的的装置。但该装置需要在极高电压和突然冲击电流时为多个晶闸管提供驱动脉冲,同时DSP控制系统、霍尔元件等也需要供电,本文所介绍的多输出高压隔离电源很好的满足了这些要求。论文从改善输出波形质量、提高效率及可靠性入手,主要涉及以下几个方面的内容。 首先,论文介绍了本课题的背景。在简要介绍了各种短路限流方法后比较详细的介绍了新型固态限流器的原理及特点,以便对本课题的整个系统有个全面的了解。 其次,论文介绍了两种交流母线结构。本章对母线类型的选择、总线电压值(或电流值)的选择、前端及负载端变换器的拓扑比较及选用、EMI滤波器设计等方面进行了详细的比较和分析,为后面章节电路设计做一些准备。 新型多输出高压隔离电源采用交流电压和电流两种母线,第三章介绍为为控制系统DSP供电的半桥电路,第四章介绍电流型交流母线,电流母线大小为2～4A可调,采用BUCK、全桥及谐振网络三级结构。这两章主要介绍各电路的工作原理、器件及芯片选用、参数确定及相互之间的协调控制。采用了理论分析、仿真确认及试验调节相结合的手段。 第五章介绍晶闸管驱动模块的设计,特别研究了开关型稳压电路的设计。 最后,论文在前面介绍的基础上,设计了一个500W以上,100KHZ的实验样机,并给出了实验波形,验证了该电路的可行性。更多还原

【Abstract】 Electricity System is one of the main applications of Power Electronics. Solid state fault current limiter(SSFCL) has the ability to limit the fault current as quickly as possible. This paper presents a new kind of power supply with high isolated voltage and multi-channel output. It can provide driving pulse for SCR and at the same time provide power for DSP control system.This paper mainly includes the contents as follows:In the first chapter, paper introduces the background. After introducing briefly all kinds of methods to limit the fault current, this paper presents particularly the principle and characteristic of SSFCL.From this chapter, We can get the all-round information about the whole system.In the second chapter, paper introduces two kinds of AC bus.This chapter mainly makes preparation for the following circuit design.The third and fourth chapter are the emphasis of the whole paper. AC current bus and AC voltage bus are adopted in these chapters. Half bridge circuit provides power for DSP system. AC current bus circuit is made up of BUCK converter , Full Bridge converter and Resonant network. We adopt theory analysis, emulate affirmation and trial adjustment methods.The fifth part introduces the design of SCR drive-module. The design of switching mode circuit is the keystone of the part.Finally, based on the analysis of above parts, paper introduces a more than 0.5 KW, 100KHZ prototype. The experimental results verify the availability of the circuit.更多还原