發(fā)布時(shí)間：2018-07-03 01:06

  本文選題：核電站 + 驅(qū)動(dòng)機(jī)構(gòu)��； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：目前,國(guó)內(nèi)核電站控制棒驅(qū)動(dòng)機(jī)構(gòu)大多數(shù)均為磁力提升型驅(qū)動(dòng)機(jī)構(gòu)(CRDM)。若驅(qū)動(dòng)機(jī)構(gòu)發(fā)生故障或性能退化,則可能產(chǎn)生滑棒、卡棒等事故,從而影響反應(yīng)堆的安全經(jīng)濟(jì)運(yùn)行。由于驅(qū)動(dòng)機(jī)構(gòu)安裝在高溫高壓的密閉環(huán)境中,無(wú)法直接對(duì)其進(jìn)行在線實(shí)時(shí)監(jiān)測(cè)。為盡早發(fā)現(xiàn)其性能退化的情況以便于及時(shí)進(jìn)行調(diào)整,需定期對(duì)驅(qū)動(dòng)機(jī)構(gòu)性能進(jìn)行測(cè)試。以往由于缺少適用的試驗(yàn)裝置,相關(guān)試驗(yàn)由試驗(yàn)人員采用通用測(cè)量設(shè)備測(cè)取數(shù)據(jù)并進(jìn)行人工判斷。相關(guān)測(cè)試在停堆換料期間進(jìn)行,由試驗(yàn)人員臨時(shí)搭建試驗(yàn)平臺(tái),獲取試驗(yàn)波形,通過(guò)人工分析電流時(shí)序、振動(dòng)信號(hào)等方式來(lái)判斷驅(qū)動(dòng)機(jī)構(gòu)性能。本課題采用虛擬儀器技術(shù),使用LabVIEW程序開發(fā)平臺(tái),設(shè)計(jì)了驅(qū)動(dòng)機(jī)構(gòu)電流監(jiān)測(cè)、振動(dòng)信號(hào)分析、落棒波形判斷與抓取、落棒時(shí)間計(jì)算、棒位線性度分析、報(bào)表生成與存儲(chǔ)、歷史數(shù)據(jù)調(diào)用等功能模塊,實(shí)現(xiàn)了驅(qū)動(dòng)機(jī)構(gòu)運(yùn)行性能的綜合分析。本課題通過(guò)偽變化判斷濾除及棒位一致性判斷方法,自動(dòng)消除實(shí)測(cè)棒位跳變輸入,保留其真實(shí)值,進(jìn)而進(jìn)行控制棒全行程內(nèi)的“給定棒位-實(shí)測(cè)棒位”線性度自動(dòng)分析及判斷。利用控制棒下落速度與棒位探測(cè)器原邊線圈感應(yīng)電壓所存在的對(duì)應(yīng)關(guān)系,通過(guò)“起始斜率反推法”及“幅值-近似勻速下降段復(fù)合法”等算法精確判斷控制棒在下落期間所處的不同階段,進(jìn)而實(shí)現(xiàn)對(duì)控制棒落棒時(shí)間的自動(dòng)測(cè)量。并進(jìn)行落棒時(shí)間符合度分析及不同控制棒落棒時(shí)間的橫向綜合比較分析。利用驅(qū)動(dòng)機(jī)構(gòu)線圈電流波形在驅(qū)動(dòng)機(jī)構(gòu)吸合動(dòng)作點(diǎn)所呈現(xiàn)的特征點(diǎn)變化及線圈電流不同階段的變化特性,采用分段濾波、電流動(dòng)作點(diǎn)凹槽捕捉、電流平臺(tái)微階躍捕捉等分析方法完成驅(qū)動(dòng)機(jī)構(gòu)性能監(jiān)測(cè)。對(duì)驅(qū)動(dòng)機(jī)構(gòu)重要性能指標(biāo)進(jìn)行監(jiān)測(cè),自動(dòng)判斷驅(qū)動(dòng)機(jī)構(gòu)運(yùn)行方向、分析其電流時(shí)序、根據(jù)運(yùn)行電流獲取驅(qū)動(dòng)機(jī)構(gòu)相關(guān)吸合點(diǎn)并結(jié)合驅(qū)動(dòng)機(jī)構(gòu)振動(dòng)信號(hào)進(jìn)行綜合分析、自動(dòng)計(jì)算驅(qū)動(dòng)機(jī)構(gòu)電流轉(zhuǎn)換時(shí)間、對(duì)驅(qū)動(dòng)機(jī)構(gòu)電流平臺(tái)進(jìn)行穩(wěn)定性分析、自動(dòng)計(jì)算驅(qū)動(dòng)機(jī)構(gòu)動(dòng)作點(diǎn)并進(jìn)行合理性分析。并根據(jù)上述分析結(jié)果對(duì)驅(qū)動(dòng)機(jī)構(gòu)運(yùn)行性能進(jìn)行綜合分析,進(jìn)而對(duì)驅(qū)動(dòng)機(jī)構(gòu)可能發(fā)生的性能退化進(jìn)行預(yù)判。
[Abstract]:At present, most of the control rod actuators in domestic nuclear power plants are magnetic lifting actuators (CRDM). If the driving mechanism fails or the performance is degraded, the accident of sliding-rod and sticking rod may occur, which will affect the safe and economical operation of the reactor. Because the drive mechanism is installed in the closed environment of high temperature and high pressure, it can not be directly monitored in real time. In order to detect the performance degradation as soon as possible for timely adjustment, the performance of the drive mechanism should be tested regularly. In the past, due to the lack of suitable test equipment, the relevant tests were measured by universal measuring equipment and judged manually. The related test is carried out during the period of shutdown and reloading. The test platform is set up temporarily by the experimenter to obtain the test waveform and to judge the performance of the driving mechanism by manually analyzing the current sequence and vibration signal. Using virtual instrument technology and LabVIEW program development platform, the paper designs driving mechanism current monitoring, vibration signal analysis, rod drop waveform judgment and grab, rod drop time calculation, rod position linearity analysis, report generation and storage. The function module of historical data transfer realizes the comprehensive analysis of the performance of the driving mechanism. In this paper, the method of pseudo-change judgment filtering and consistency judgment is used to automatically eliminate the jump input of measured rod position, to retain its true value, and then to analyze and judge automatically the linearity of "given rod position-measured rod position" in the whole stroke of the control rod. Based on the relationship between the falling velocity of the control rod and the inductive voltage of the primary coil of the rod position detector, By means of "initial slope backstepping method" and "amplitude-approximate uniform descent section compound method", the different stages of the control rod in the falling period are accurately determined, and the automatic measurement of the control rod drop time is realized. The consistency analysis of drop-off time and the lateral comprehensive analysis of different control rod drop-off time are carried out. By using the characteristic point change of the current waveform of the driving mechanism coil at the driving mechanism suction action point and the variation characteristics of the coil current in different stages, the section filter is adopted, and the current action point groove is captured. The current platform microstep capture and other analysis methods are used to monitor the performance of the drive mechanism. Monitoring the important performance index of the driving mechanism, automatically judging the running direction of the driving mechanism, analyzing its current sequence, obtaining the relevant suction points of the driving mechanism according to the running current and synthetically analyzing the vibration signal of the driving mechanism. The current conversion time of the driving mechanism is calculated automatically, the stability of the current platform of the drive mechanism is analyzed, the action point of the driving mechanism is calculated automatically and the rationality is analyzed. According to the above analysis results, the performance of the driving mechanism is comprehensively analyzed, and the possible performance degradation of the drive mechanism is forecasted.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM623;TP311.52

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