基于廣域相量測(cè)量的中性點(diǎn)不接地系統(tǒng)在線故障定位研究.pdf

1、華北電力大學(xué)碩士學(xué)位論文摘要本文在完成離線定位的基礎(chǔ)上進(jìn)行在線定位的探索研究，選擇的對(duì)象是中性點(diǎn)不接地配電系統(tǒng)，采用基于廣域相量測(cè)量的移動(dòng)式定位法進(jìn)行定位，該方法的主要原理是利用故障線路各測(cè)量點(diǎn)零序電流幅值和零序相角的差別進(jìn)行故障路徑辨識(shí)。為獲得零序相角，必須保證零序電壓、電流的同步采樣以及沒有通信光纜條件下的數(shù)據(jù)通信，為此本文引入了GPS同步測(cè)量技術(shù)和GPRS無線通信技術(shù)。本文對(duì)該定位方法的可行性進(jìn)行了理論分析、軟件仿真和物理實(shí)驗(yàn)，并

2、以8051單片機(jī)為核心開發(fā)了在線定位的實(shí)驗(yàn)樣機(jī)。關(guān)鍵詞:配電網(wǎng)，故障定位，在線定位ABSTRACT5ineedistributionnetworks’offlinefaultloeationhasbeendone，thisPaPerdealswithoriginalresearehonon一linefaultlocationofneutralPointnon一groundedsystem.Ontheelectricalsystems，t

3、heamPlitudeandPhaseofzerosequeneeeurrentonandofffaultroute(whieh15exPlainedintheartiele)aredifferentwhenfaultoecured，whiehPhenomenoncanbeusedtoloeatethefaultPoint.Basingonthistheory，hereusethewide一area一Phase一measurementm

4、ethodtealizetheloeationoPeration，buthowtogetthezerosequeneevoltageandeurrentandhowtoeommunieatearethemosttoughProblems，tosolvetheseProblems，theGPSsynehronousmeasurementtechnologyandtheGPRSeommunieationteehnologyareimPort

5、ed.ThisPaPerfirstProvesthefeasibilityofthemethodtheoreticallyandthensoftwaresimulationandIaboratoryexPerimentareimPlemented，whichbothProvesthetheory.Afteralltheseresearch，thePaPerintroduceshowtealizethePrototyPemachineba

6、sedon8051singleehiPmieyoeo.YangPeng(electricPowersystemitsautomation)DireetedbyProf.YangYi一hanKEYWORDS:distributionnetwork，faultlocation，on一linefaultlocation華北電力大學(xué)碩士學(xué)位論文第五章方案的實(shí)現(xiàn)二，....……，..................................

7、……235.1設(shè)計(jì)電路部分元件簡(jiǎn)介.......................................……235.1.1C8051單片機(jī)............................................……235.1.2HOLUXM一87GPS芯片......................................……255.1.3LM339N運(yùn)算放大芯片.....................

8、.................……265.1.4LCMO46液晶顯示芯片.....................................……275.2硬件電路....................................................……285.2.1送端電路設(shè)計(jì)............................................……2S5.2.2受端電路設(shè)計(jì)........

9、...……，..........................……295.3單片機(jī)軟件設(shè)計(jì)..............................................……305.3.1流程圖..................................................……305.3.2服務(wù)程序軟件.............……，....……，..……，....……315.3.2.1主程序.....

10、..............................……，....……315.3.2.2工NTO中斷服務(wù)程序......................……，.....……，.325.3.2.3定時(shí)器2和工NTI中斷服務(wù)程序.........................……325.3.2.4串口中斷服務(wù)程序....................................……335.4高位機(jī)軟件設(shè)計(jì)..........

11、....................................……345.4，1服務(wù)器高位機(jī)程序..……，........……，................……355.4.2送端高位機(jī)程序..............……，.....................……365.4.3受端高位機(jī)程序.，........................................……40第六章結(jié)論與展望...........

12、.....................................……43參考文獻(xiàn)...................................……，..……，，......……44致謝............................……，.......................……46附錄..........................................................…