优秀毕业设计（论文）：基于S320LF2407A DSP芯片的三相三线制电网的负序和无功补偿的原理和软硬件设计精选.doc

摘要 无功功率是影响电压稳定的一个重要因素，它关系到整个电力系统能否安全稳定的运行。由于工业企业存在大量低功率因数、冲击性负载，导致大量无功的产生;同时，随着电力电子技术的发展，在工业领域内大功率的电力电子设备得到广泛运用，然而，由于电力电子设备的非线性特性，运行时又会产生大量谐波，因此，如何将无功补偿与谐波抑制同时进行考虑，是未来无功补偿技术领域的重要研究课题之一。 本设计介绍了功率理论的发展，以及常用的无功补偿方式的原理和特点，同时重点介绍了瞬时无功功率理论以及以此为基础的TSC无功补偿控制器。在硬件方面，本文设计了基于LF2407A DSP芯片的TSC控制器、控制器外围电路及主电路三大模块。在软件方面，本文包括数据采集软件、控制投切算法、触发控制软件三部分。其中着重介绍了无冲击电流投入电容的设计思路，得出了一个好的电路。 软件仿真和样机实测结果表明，这种TSC装置在提供动态无功功率补偿和减小冲击涌流方面具有优良的性能。 关键词:晶闸管投切电容器;数字信号处理器:无功功率补偿;无冲击涌流投入 Abstract Reactive power is an important factor to the voltage stability, and it is also related to secure and steady operation of the power systems. Plenty of low power factor and fluctuant load in the industrial enterprises cause the generation of a large amount of var. With development of the electric and electronic technology large-power electric and electronic devices which are non-linear and generate a large amount of harmonic during the running are widely used in the industries. Therefore, how to combine reactive power compensation and harmonic suppressionis one of the important subjects in the future study of the reactive power compensation technology. In this paper, the development of power theory and reactive power compensation equipment are introduced, and the emphasis is on instantaneous power theory and the TSC Controller based on this theory. In this device, three modules are designed in this paper, including the TSC controller based on LF2407A DSP chip, the peripheral circuit and the main circuit. In terms of software, the data collection software, the calculation method of switch control and the trigger control software are discussed with focus on the design of the turn-on without inrush current. The results of software emulation and measurement of model machine have indicated that this type of TSC provides superior performance of dynamic reactive power compensation .and decreasing inrush current. Key words: TSC; DSP; Reactive power compensation; Turn-on without inrush current 目录 摘要 I Abstr