無功補(bǔ)償論文



摘 要 
 本課題研究以低壓電網(wǎng)無功補(bǔ)償改造為背景，研制了一種低壓無功功率補(bǔ)償控制器。作為一種非實時的無功補(bǔ)償裝置，該裝置以定時的電網(wǎng)監(jiān)測數(shù)據(jù)為依據(jù)，以城鎮(zhèn)低壓網(wǎng)(220V)的無功補(bǔ)償為對象。本文主要研究了無功補(bǔ)償對電網(wǎng)性能的改善，以及控制器的軟硬件的配置。
 系統(tǒng)采用 單片機(jī)，該單片機(jī)是美國ATMEL公司生產(chǎn)的低電壓，高性能的CMOS 8位單片機(jī)，具有運(yùn)算速度高，實時性好的特點；軟件則使用匯編語言進(jìn)行編譯；人機(jī)操作界面采用LCD顯示,顯示效果較好；A/D轉(zhuǎn)換采用 ，是一款比較實用的A/D轉(zhuǎn)換裝置。該裝置可跟蹤電網(wǎng)無功功率的變化并自動補(bǔ)償,實現(xiàn)了無功補(bǔ)償裝置的優(yōu)化運(yùn)行,具有體積小、原理簡單、智能投切等優(yōu)點。

關(guān)鍵詞：無功補(bǔ)償,單片機(jī),低電壓

Abstract

 What this article studies is based on the alteration of reactive power compensation of low voltage, then design an equipment for reactive power compensation of low voltage. As a kind of reactive power compensation, this equipment is basis on the electrical network monitor data ,and provides reactive power for city’s low voltage power grids. This thesis has discussed the importance of the reactive power compensation for the power grids ,and introduded the hardware and software of the controller.
 This device's hardware core is AT89C51 SCM , which has many merits such as high operating speed. This monolithic integrated circuit is the low voltage which American ATMEL Corporation produces, a high performance CMOS 8 monolithic integrated circuits;The software uses the assembly language to carry on the translation;The man-machine operation contact surface uses the LCD demonstration, the demonstration effect is quite good; A/D transformation uses ADC0809 , it is a section of quite practical A/D switching device. This equipment may track the electrical network reactive power the change and the automatic compensation, and this installment has the volume to be small, the precision is high, the price compared to the higher merit.

Key Words:  reactive power compensation, SCM(Single Chip Micyoco),low voltage

 
目錄

摘 要 I
ABSTRACT I
目錄 II
第一章 緒論 - 1 -
1．1研究背景 - 1 -
1．2無功補(bǔ)償裝置的發(fā)展?fàn)顩r - 2 -
1．3 本課題主要研究的內(nèi)容 - 4 -
第二章 無功補(bǔ)償?shù)脑?nbsp;- 6 -
2．1 無功補(bǔ)償?shù)脑?nbsp;- 7 -
2．2 低壓電網(wǎng)中的幾種無功補(bǔ)償?shù)姆绞?nbsp;- 9 -
2．3確定補(bǔ)償容量的幾種方法 - 10 -
2．4 本章小結(jié) - 12 -
第三章 硬件設(shè)計 - 13 -
3．1 無功補(bǔ)償裝置的技術(shù)要求 - 13 -
3．2硬件介紹 - 14 -
3．3模擬信號調(diào)理電路 - 22 -
3．4 輸出控制電路 - 25 -
3．5 本章小結(jié) - 26 -
第四章  軟件設(shè)計 - 27 -
4．1 投切原則 - 27 -
4．2功率因數(shù)計算 - 28 -
4．3 本章小結(jié) - 30 -
第五章 總結(jié)與展望 - 31 -
致謝 - 32 -
參考文獻(xiàn)： - 33 -