文档介绍：基于PLC的电力系统无功补偿系统
设计
摘要
无功功率补偿装置在电力系统中所承担的作用是提高电网的功率因数,降低供电变压器及输送线路的损耗,提高供电效率,改善供电环境。所以无功功率补偿装置在电力供电系统中处在一个不可缺少的非常重要的位置。合理的选择补偿装置,可以做到最大限度的减少网络的损耗,使电网质量提高。本设计主要功能是可检测出当前电网的电流电压并可显示,计算出当前的功率因数及无功补偿量,并利用PLC编程控制投切电容实现对电网的无功补偿并显示当前投切状态。本设计中我们的投切控制原理可以用九区图来说明。无功超上限投入电容器,超下限切除电容器。电压超上限调制变压器分接头降低电压,电压超下限调制变压器分接头升高电压。本设计中我们首先要计算出补偿容量并通过它来控制投切。
关键词:电力系统;功率因数;无功补偿;九区图;PLC
The Design of Reactive pensation System Based on the PLC in Electric Power System
Abstract
The reactive pensation system the function which undertakes in the electric power system is enhances the work the power factor,Reduces the power supply transformer and the delivery conduit loss, enhances the power supply efficiency, the improvement power supply environment. Therefore the reactive pensation system occupies an essential extremely important position in the electric power supply system. The reasonable pensation system, may achieve the maximum limit work the loss, causes the work quality enhancement. This design main function is may examine the current work the electric current voltage and may demonstrate that, calculates the current power factor and the idle pensates the quantity, pensates the algorithm according to the idle work to throw using PLC cuts the electric capacity realization pensate and the demonstration to the work idle work current throws cuts the condition. In this design we throw cut the control principle to be possible to use nine area charts to explain. Idle work ultra upper limit investment capacitor, ultra lower limit excision capacitor. The voltage ultra upper limit modulation transformer tapping reduces the voltage, the voltage ultra lower limit modulation transformer tapping boosting. In this design we first must calculate pensation capacity and control through it throw cut.
Keywords:Electric power system; Power factor; The reactive pensation; Nine area charts;PLC
目录
摘要 I
ABSTRACT II
引言 1
第1章绪论 2
方案比较及本设计总体方案 2
电力系统传统的智能控制方案 2
中低压电网自动化PLC实现 3
本设计