【摘要】：敏感設(shè)備對(duì)電壓暫降的耐受特性研究是分析電壓暫降影響嚴(yán)重性、提出緩解措施的重要基礎(chǔ)。本文首先利用能量守恒關(guān)系、直流側(cè)動(dòng)態(tài)方程、異步電機(jī)動(dòng)態(tài)方程,詳細(xì)揭示變頻調(diào)速系統(tǒng)受電壓暫降的影響狀況,分析了變頻調(diào)速系統(tǒng)電壓暫降耐受特性受接口影響因素(保護(hù)閾值、控制策略負(fù)荷特性)、負(fù)荷側(cè)影響因素(負(fù)荷特性)以及源側(cè)影響因素(電壓暫降類(lèi)型、電暫降前/后電壓幅值、暫降形狀)影響的機(jī)理。在機(jī)理分析的基礎(chǔ)上,為完善并標(biāo)準(zhǔn)化變頻調(diào)速系統(tǒng)電壓暫降耐受特性的測(cè)試,根據(jù)變頻調(diào)速系統(tǒng)自身的特點(diǎn),提出了一套完整而系統(tǒng)的測(cè)試方法,并給出了具體的試驗(yàn)方案。測(cè)試方法主要包括運(yùn)行故障判據(jù)選擇、測(cè)試項(xiàng)目的設(shè)計(jì)、測(cè)試平臺(tái)的搭建、測(cè)試步驟等。根據(jù)試驗(yàn)方案并結(jié)合實(shí)驗(yàn)室設(shè)備條件對(duì)變頻調(diào)速系統(tǒng)電壓暫降耐受特性進(jìn)行了試驗(yàn)研究,考慮影響因素包括直流低電壓保護(hù)、過(guò)電流保護(hù)、轉(zhuǎn)矩、轉(zhuǎn)速、電壓暫降類(lèi)型、暫降起始點(diǎn)、相位跳變、諧波、暫降前/后電壓幅值、多重電壓暫降等;通過(guò)對(duì)記錄的試驗(yàn)數(shù)據(jù)進(jìn)行分析,得到了不同狀況下的電壓暫降敏感度曲線,驗(yàn)證了機(jī)理分析的正確性以及測(cè)試方法的有效性。為了準(zhǔn)確表征實(shí)際設(shè)備電壓暫降耐受特性的不確定性,本文基于10716組試驗(yàn)數(shù)據(jù)的分析,提取了變頻調(diào)速系統(tǒng)的通用敏感度曲線,并進(jìn)一步細(xì)化模糊區(qū)域,基于統(tǒng)計(jì)結(jié)果建立了模糊區(qū)域的概率模型。試驗(yàn)結(jié)果證明,變頻調(diào)速系統(tǒng)電壓暫降耐受特性測(cè)試方法是可行、有效的。本文研究結(jié)果可以為變頻調(diào)速系統(tǒng)標(biāo)準(zhǔn)測(cè)試方法以及評(píng)估電壓暫降對(duì)含有變頻調(diào)速系統(tǒng)的工業(yè)流程影響提供必要的依據(jù)。
[Abstract]:The study on the tolerance of sensitive equipment to voltage sag is an important basis for analyzing the severity of voltage sag and putting forward mitigation measures. In this paper, the energy conservation relation, the DC side dynamic equation and the asynchronous motor dynamic equation are used to reveal in detail the influence of voltage sag on the variable-frequency speed regulation system. This paper analyzes the influence factors (protection threshold, control strategy load characteristic), load side factor (load characteristic) and source side factor (voltage sag type) on voltage sag tolerance characteristic of frequency conversion system. The mechanism of the effect of voltage amplitude and shape before and after electric swoop. On the basis of mechanism analysis, in order to perfect and standardize the test of voltage sag tolerance characteristics of variable-frequency speed regulating system, a set of complete and systematic test method is put forward according to the characteristics of frequency conversion speed regulating system itself, and the concrete test scheme is given. The test method mainly includes the selection of running fault criterion, the design of test project, the construction of test platform, the test steps and so on. According to the test scheme and combined with the condition of laboratory equipment, the characteristics of voltage sag tolerance of variable-frequency speed regulating system are studied. The influence factors including DC low-voltage protection, over-current protection, torque, speed, voltage sag type are considered. Starting point of sag, phase jump, harmonic, voltage amplitude before / after sag, multiple voltage sag and so on; By analyzing the recorded test data, the sensitivity curves of voltage sag under different conditions are obtained, and the correctness of the mechanism analysis and the validity of the test method are verified. In order to accurately characterize the uncertainty of voltage sag tolerance characteristics of practical equipment, based on the analysis of 10716 sets of test data, the general sensitivity curve of variable-frequency speed regulating system is extracted, and the fuzzy region is further refined. The probability model of fuzzy region is established based on the statistical results. The test results show that the test method of voltage sag tolerance is feasible and effective. The results of this paper can provide the necessary basis for the standard test method of frequency conversion speed regulation system and the evaluation of the influence of voltage sag on the industrial process with frequency conversion speed regulation system.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM714.2

【參考文獻(xiàn)】

中國(guó)期刊全文數(shù)據(jù)庫(kù) 前10條

1 徐永海;洪旺松;蘭巧倩;;電壓暫降起始點(diǎn)與相位跳變對(duì)交流接觸器影響的分析[J];電力系統(tǒng)自動(dòng)化;2016年04期

2 徐永海;蘭巧倩;洪旺松;;交流接觸器對(duì)電壓暫降敏感度的試驗(yàn)研究[J];電工技術(shù)學(xué)報(bào);2015年21期

3 劉陽(yáng);肖先勇;張逸;汪穎;李鍇科;;敏感過(guò)程電壓暫降響應(yīng)事件及其風(fēng)險(xiǎn)的區(qū)間直覺(jué)模糊評(píng)估[J];電網(wǎng)技術(shù);2015年05期

4 孔祥雨;徐永海;陶順;;基于一種電壓暫降新型描述的敏感設(shè)備免疫能力評(píng)估[J];電工技術(shù)學(xué)報(bào);2015年03期

5 甄曉晨;陶順;肖湘寧;周雙亞;;電壓暫降的工廠級(jí)經(jīng)濟(jì)損失評(píng)估模型研究[J];電力系統(tǒng)保護(hù)與控制;2013年12期

6 肖先勇;楊洪耕;陳武;李華強(qiáng);;敏感設(shè)備電壓暫降敏感度的模糊隨機(jī)評(píng)估[J];中國(guó)電機(jī)工程學(xué)報(bào);2009年34期

7 張欽;王錫凡;付敏;王建學(xué);;需求響應(yīng)視角下的智能電網(wǎng)[J];電力系統(tǒng)自動(dòng)化;2009年17期

8 肖世杰;;構(gòu)建中國(guó)智能電網(wǎng)技術(shù)思考[J];電力系統(tǒng)自動(dòng)化;2009年09期

9 肖先勇;王希寶;薛麗麗;劉波;楊洪耕;;敏感負(fù)荷電壓凹陷敏感度的隨機(jī)估計(jì)方法[J];電網(wǎng)技術(shù);2007年22期

10 郭強(qiáng);張運(yùn)洲;呂健;;我國(guó)未來(lái)同步電網(wǎng)構(gòu)建研究[J];電網(wǎng)技術(shù);2005年22期

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