【作者】 张志强；

【导师】 吕玉祥；

【作者基本信息】 太原理工大学 ， 物理电子学， 2008， 硕士

【摘要】 随着现代化工业的深入发展,用户对配电系统的要求不断提高,尤其是一些新型电力敏感负荷对电能暂态质量的可靠性、可控性提出了更高的要求。而现有配电网中大量使用的机械式断路器因受其自身物理结构的制约,其操动机构动作时不仅伴随着噪声和弧光,而且开断时间长,难以满足一些电力用户对电流开断的速动性要求。因此,基于电力电子开关器件的固态断路器(SSB)因其卓越的电流关断性能使其自问世以来便引起广泛的关注。本文结合山西省电力公司相关项目的研究,提出一种10kV电压等级基于IGCT的新型智能固态断路器的实现方案。该系统开关主体部分由IGCT开关模块、门极驱动模块、保护模块及强力风冷装置等组成,智能控制系统部分由数据处理子系统和人机交互子系统组成,论文主要完成了以下几方面的工作:(1)在分析IGCT开关特性的基础上,利用电力电子仿真软件PSIM建立IGCT功能仿真模型结构,详细讨论了模型中关键参数的计算,并对其有效性进行了验证。(2)根据固态断路器的应用分析,提出了新型固态断路器的整体设计方案,详细分析了主体开关的拓扑结构及其控制策略,并对设计方案进行了仿真研究和验证,结果表明其开断参数达到了设计要求,可为配电网络的正常运行提供可靠保障。(3)完成了辅助控制系统的硬件和软件设计。分别对数据处理子系统与人机交互子系统中硬件关键模块和软件程序的设计进行了论述,并对其中的重要算法进行了理论分析。更多还原

【Abstract】 With the in-depth development of modern industry, higher performance standards for electric power distribution system are continually presented by users, in particular for some novel electric power sensitive load which has the very sensitive dependence on the quality of reliability and controllability of transient power. In the existing distribution network, mechanical circuit breakers are used at a large-scale. However, mechanical circuit breakers can’t meet the demand of rapid switch of current because of its operation accompanied with noise, electric arc and the longer response time for switch. On the other hand solid-state circuit breakers (SSB) based on power electronic switching devices are given widespread concern since the advent of them due to their outstanding performance of the switch current.In this paper, a novel design scheme on intelligent solid-state circuit breaker at 10kV level is presented based on IGCT projects of Shanxi Power Company. The main part of the circuit breaker is made up of the IGCT switch modules, gate drive module, protection module and powerful air-cooled device. The intelligent control system consists of digital processing subsystem and HCI subsystem. The main work in this paper is as follows:(1) IGCT functional simulation model was established by power electronics simulate software PSIM based on the analysis of IGCT switching characteristics, and key parameters were discussed in detail in the model whose validity is verified. (2) An overall design of a novel SSB was given out by analysis the application of SSB, coupled with the analysis of main switch topology structure and control strategy. The simulation results showed that the breaking parameters of SSB met the design requirements, and it can provide reliable protection for the normal operation of distribution network.(3) The hardware and software design of intelligent control system was completed. We discussed separately key hardware module and software programs in data processing subsystems and interactive subsystem, and analyzed theoretically critical algorithms.更多还原