低压无功补偿系统硬件设计分解.doc

摘　　要 本文主要介绍低压无功补偿装置的基本原理、控制方案以及硬件方面的选型和设计。 该补偿系统采用TI公司的定点TMS320LF2812系列DSP和MCU的双控制器进行控制，TMS320LF2812为补偿装置的总控制器，具有自动采样计算、无功自动调节、故障保护、数据存储等功能。同时具备指令运算速度快（约100MIP）、运算量大的优点，同时MCU与外部设备进行通讯，互不干扰，更好的满足了实时性和精确性的要求。采用晶闸管控制投切电容器、数字液晶实时显示系统补偿情况，可以实现快速、无弧、无冲击的电容器投切。为了更详细的介绍该系统，在论文第四章设计了比较完整的各功能模块的硬件电路图，其中包括电源模块、信号变换及调理模块、AD采样模块、锁相同步采样模块、通讯模块等。 关键字：低压无功补偿；晶闸管投切电容器；DSP Abstract This paper mainly introduces the basic principle of low-voltage reactive power compensation device, control scheme and hardware selection and design. The compensation system by TI companys fixed-point tms320lf2812 series DSP and MCU dual controller control, tms320lf2812 compensation device controller with automatic sample calculation, automatic reactive power regulation, fault protection, data storage and other functions. At the same time with the instruction operation speed (about 100MIP), the advantages of large amount of computation. At the same time, MCU and peripheral equipment communication and do not interfere with each other, better meet the requirements of real-time and accurate. The use of thyristor controlled switched capacitor, digital LCD display real-time compensation system situation can achieve fast, no arc , without the impact of the capacitor switching. In order to more detailed introduction to the system. In the fourth chapter of the thesis design the hardware circuit diagram of each function module of relatively complete, including power module, signal transformation and conditioning module, AD sampling module, phase locking synchronous sampling module, communication module block and so on. Key Words:Low voltage reactive power compensation;Thyristor switched capacitor; DSP 目　　录 目　　录 2 第一张　绪论 1 1.1 选题的背景与意义 1 1.2 低压无功补偿装置的发展状况 1 1.2.1国外情况 2 1.2.2国内情况 3 1.3 本课题研究的主要内容 3 第二章　TSC无功补偿的基本原理 5 2.1 无功补偿的基本原理 5 2.2 低压电网无功补偿的方式 6 2.3 晶闸管投切电容器的原理 7 2.3.1晶闸管投切电容器的基本原理 8 2.3.2补偿回路的构成及原理 9 2.3.3晶闸管触发原则 10 2.3.4电容器的分组方式 12 第三章　无功补偿控制系统的总体设计 14 3.1 系统的基本原理 14 3.2 主电路连接方式 14