本文選題：高壓直流輸電 + 諧波傳遞�。� 參考：《華北電力大學(xué)》2014年碩士論文

【摘要】：為解決我國(guó)能源分布及負(fù)荷發(fā)展極不平衡的問題,必須發(fā)展遠(yuǎn)距離、大容量的高壓直流輸電,實(shí)現(xiàn)大區(qū)域電網(wǎng)之間的互聯(lián)。由于大功率電力電子設(shè)備的投入,諧波問題也隨之產(chǎn)生。本文分析了高壓直流輸電諧波傳遞特性及其影響因素,在此基礎(chǔ)上,研究由諧波傳遞引起的諧波不穩(wěn)定問題及其解決方法。 首先,本文從理論上分析諧波傳遞特性,采用開關(guān)函數(shù)法推導(dǎo)出諧波從換流器交流側(cè)到直流側(cè)、諧波從換流器直流側(cè)到交流側(cè)以及諧波在交直流系統(tǒng)中的傳遞規(guī)律。隨后對(duì)諧波傳遞可能引起的諧波不穩(wěn)定進(jìn)行理論分析,理論推導(dǎo)得到交直流側(cè)諧振頻率互補(bǔ)公式以及換流器交直流側(cè)的等值諧波阻抗。提出諧波不穩(wěn)定的幾種抑制措施。 在PSCAD/EMTDC仿真軟件中搭建接近工程實(shí)際的高壓直流輸電諧波傳遞模型。通過諧波注入法在模型中不同點(diǎn)注入不同次數(shù)和幅值的諧波,比較仿真結(jié)果,驗(yàn)證了諧波傳遞特性。探討了影響諧波傳遞的三個(gè)因素及其影響程度,包括傳輸功率、運(yùn)行方式和平波電抗器。 針對(duì)仿真中由直流側(cè)3次諧波傳遞引起的諧波不穩(wěn)定問題,采用頻率掃描法得到模型中交流系統(tǒng)和直流系統(tǒng)的諧波阻抗頻率特性,結(jié)合理論推導(dǎo)分析了出現(xiàn)諧波不穩(wěn)定的原因。通過在換流器交直流側(cè)加裝非特征諧波濾波器有效地抑制了諧波不穩(wěn)定。
[Abstract]:In order to solve the problem of unbalanced energy distribution and load development in China, it is necessary to develop high voltage direct current (HVDC) transmission with long distance and large capacity, so as to realize interconnection among large regional power networks. Due to the input of high power electronic equipment, harmonic problems also arise. In this paper, the harmonic transmission characteristics of HVDC and its influencing factors are analyzed. On the basis of this, the harmonic instability caused by harmonic transmission and its solution are studied. Firstly, the harmonic transfer characteristics are analyzed theoretically, and the harmonic transfer rules from AC side to DC side of converter, from DC side to AC side of converter and in AC / DC system are deduced by switching function method. Then the harmonic instability caused by harmonic transmission is theoretically analyzed and the complementary formula of AC / DC resonant frequency and equivalent harmonic impedance of AC / DC side of converter are derived theoretically. Several measures to restrain harmonic instability are put forward. The harmonic transfer model of HVDC is built in PSCAD/EMTDC simulation software. The harmonic transfer characteristics are verified by comparing the simulation results with the harmonic injection method at different points in the model for different times and amplitudes of harmonics. Three factors affecting harmonic transmission and their influence degree are discussed, including transmission power, operation mode and wave reactor. Aiming at the harmonic instability caused by the third harmonic transmission at the DC side, the harmonic impedance frequency characteristics of the AC system and the DC system in the model are obtained by frequency scanning method, and the reasons for the harmonic instability are analyzed in combination with the theoretical derivation. The harmonic instability is effectively suppressed by adding a non-characteristic harmonic filter to the AC / DC side of the converter.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM721.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 祁才君,王小海;基于插值FFT算法的間諧波參數(shù)估計(jì)[J];電工技術(shù)學(xué)報(bào);2003年01期

2 李庚銀,呂鵬飛,李廣凱,周明;輕型高壓直流輸電技術(shù)的發(fā)展與展望[J];電力系統(tǒng)自動(dòng)化;2003年04期

3 郝巍;李興源;金小明;吳小辰;顏泉;李峰;;直流輸電引起的諧波不穩(wěn)定及其相關(guān)問題[J];電力系統(tǒng)自動(dòng)化;2006年19期

4 穆子龍;李興源;;交、直流輸電系統(tǒng)相互影響引起的諧波不穩(wěn)定問題[J];電力系統(tǒng)自動(dòng)化;2009年02期

5 樊麗娟;穆子龍;金小明;王渝紅;李興源;;高壓直流輸電系統(tǒng)送端諧波不穩(wěn)定問題的判據(jù)[J];電力系統(tǒng)自動(dòng)化;2012年04期

6 朱革蘭,任震;高壓直流輸電系統(tǒng)混合直流濾波器性能研究[J];電力自動(dòng)化設(shè)備;2001年08期

7 史丹;任震;余濤;;高壓直流輸電系統(tǒng)的諧波分析方法綜述[J];電力自動(dòng)化設(shè)備;2006年04期

8 李季;羅隆福;許加柱;李勇;張杰;劉福生;;直流輸電諧波不穩(wěn)定抑制新方法[J];電力自動(dòng)化設(shè)備;2008年02期

9 鄭連清;何立新;;基于支持向量回歸機(jī)的諧波分析[J];電力自動(dòng)化設(shè)備;2008年02期

10 莫青,孫浩良;IEC標(biāo)準(zhǔn)中設(shè)備諧波電流限值的依據(jù)及推導(dǎo)[J];電網(wǎng)技術(shù);2000年04期

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