外文翻譯---關(guān)于標(biāo)準(zhǔn)或非標(biāo)準(zhǔn)沖擊波對電力變壓器的影響的研究-文庫吧
2024-12-31 02:31 本頁面
【正文】 中部和尾部產(chǎn)生了較高的電壓。0%抽頭的情況比10%抽頭的情況包含更高的電壓。 暫態(tài)研究的基礎(chǔ)就是由于標(biāo)準(zhǔn)或非標(biāo)準(zhǔn)的沖擊波對變壓器線圈產(chǎn)生的暫態(tài)響應(yīng)的研究。為了合理地設(shè)計線圈的絕緣結(jié)構(gòu)，設(shè)計者需要了解每一個變化過程，至少是線圈的每一部分的暫態(tài)電壓變化過程，或者是線圈每一部分與其相鄰線圈線圈部分之間的暫態(tài)電壓變化過程。為了確保變壓器正常運(yùn)行時的電壓值在耐雷電沖擊電壓之下，對比標(biāo)準(zhǔn)和非標(biāo)準(zhǔn)雷電波下絕緣特性的不同是十分必要的[6]。這項(xiàng)研究在未來將被延伸到在其它非標(biāo)準(zhǔn)雷電沖擊波下絕緣特性的研究中，例如衰減波形和遞增振蕩波形?；谶@些大量研究的必要性，相關(guān)測試標(biāo)準(zhǔn)應(yīng)該相應(yīng)的改變。電力變壓器在納秒級的波前時間內(nèi)的波過程應(yīng)該在更深遠(yuǎn)的研究中實(shí)施?；谶@些大量的研究，對于制造另一種波形而不是標(biāo)準(zhǔn)波形的需要和愿望在沖擊試驗(yàn)中應(yīng)該被確定并且相應(yīng)的調(diào)整和發(fā)展。Study of Effects of Standard and NonStandard Impulse Waves On Power TransformerAbstract This paper aims to highlight the observations made on surge performance of a power transformer. The impulse test on power transformers simulates the conditions that exist in service when a transformer is subjected to an ining high voltage surge due to lightning or other disturbances on the associated transmission line. A simulated nonlinear transformer model helps to analyze the surge response under varying impulse waveforms accurately and so surge modeling of the transformer using MATLAB SIMULINK has been done. For a range of applied waves (both standard and nonstandard) and different winding connections, parison of the insulation characteristics under nonstandard lightning impulse voltage waveforms which represent actual surge waveforms encountered in the field and the characteristics under the standard lightning impulse waveform quantitatively can be made. An investigation on the transformer behavior when subjected to standard and non standard impulse waves is done in this paper. The maximum voltage to ground and maximum voltage across the coils along with the time of their occurrences against different coils for 0% tapping and 10% tapping respectively is recorded and analyzed.Index Terms Modeling, Power Equipments, Standard and Non standard impulse waves, Transformer winding.I. INTRODUCTIONMonitoring the health of power transformer is important for the reliability of electrical power supply. Impulse tests are an efficient quality control tool, performed on power transformers to assess their insulation integ rity [1]. Transformer insulation is determined to a great extent by the transient voltages and stresses which appear in the transformer winding [2]. Varying impulse voltages with long wave shape and large magnitude may be due to switching fault, lightning surge or by mercial impulse voltage test in the laboratory [3]. In case of lightning impulse voltage test, standard waves shape of [4]. When the transformer is tested with
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