發(fā)布時(shí)間：2018-11-22 11:34

【摘要】：如何抑制電力系統(tǒng)電壓崩潰對(duì)整個(gè)電網(wǎng)都有著至關(guān)重要的作用。而低壓減載是維持電壓穩(wěn)定的有效手段,合理有效的選擇切負(fù)荷節(jié)點(diǎn),可以使整個(gè)網(wǎng)絡(luò)在較短時(shí)間內(nèi)回到穩(wěn)定運(yùn)行的狀態(tài),進(jìn)而保護(hù)整個(gè)電網(wǎng)的穩(wěn)定運(yùn)行。本文首先從電力系統(tǒng)電壓穩(wěn)定特性出發(fā),介紹了相應(yīng)的特性原理,進(jìn)而結(jié)合常用的分析指標(biāo),比較不同指標(biāo)的試用范圍和優(yōu)缺點(diǎn)。以此為依據(jù),進(jìn)一步探討低壓減載的設(shè)計(jì)方案,從作用機(jī)理入手,通過數(shù)學(xué)方法對(duì)低壓減載的原理進(jìn)行描述,同時(shí)結(jié)合一般準(zhǔn)則,按照不同的故障類型進(jìn)行考慮,進(jìn)行配置設(shè)計(jì)。最后通過天津電網(wǎng)進(jìn)行實(shí)例分析,從指標(biāo)分析電壓穩(wěn)定性,當(dāng)仿真模擬算例驗(yàn)證,證明了該方法保證了系統(tǒng)電壓快速恢復(fù)和較高的穩(wěn)定裕度,同時(shí)驗(yàn)證了該方法的合理性和有效性。本文在國(guó)外研究的基礎(chǔ)上,分析國(guó)外的優(yōu)秀經(jīng)驗(yàn),同時(shí)對(duì)國(guó)內(nèi)的現(xiàn)狀進(jìn)行初步探討,指出了低壓減載的重要性以及我國(guó)現(xiàn)階段的不足。無論是離線還是整定上,都和優(yōu)秀先進(jìn)的技術(shù)存在差距,因此需要進(jìn)一步提升。在此基礎(chǔ)上,提出了本文的研究?jī)?nèi)容和相應(yīng)的研究方法;通過穩(wěn)定性原理分析,結(jié)合相應(yīng)的數(shù)學(xué)理論,對(duì)電壓穩(wěn)定性進(jìn)行了一個(gè)較為全面的介紹,也對(duì)低壓減載的進(jìn)一步分析打下基礎(chǔ);在電壓穩(wěn)定性原理明確的基礎(chǔ)上,對(duì)低壓減載進(jìn)行細(xì)致全面的討論,研究了相應(yīng)的判定依據(jù)和選定方法,提出了相應(yīng)的配置思想,給出簡(jiǎn)單的設(shè)計(jì)方案;最后結(jié)合天津地區(qū)實(shí)際電網(wǎng)進(jìn)行分析,給出常見的指標(biāo)體系,同時(shí)結(jié)合實(shí)際仿真對(duì)敘述的方法進(jìn)行實(shí)例計(jì)算。
[Abstract]:How to suppress the voltage collapse of power system plays an important role in the whole power system. Low voltage load reduction is an effective means to maintain voltage stability. Reasonable and effective selection of load shedding nodes can make the whole network return to stable operation state in a short time and then protect the stable operation of the whole power network. Based on the voltage stability characteristics of power system, this paper first introduces the principle of the characteristics, and then compares the trial range, advantages and disadvantages of the different indexes with the commonly used analysis indexes. Based on this, the design scheme of low voltage load reduction is further discussed. The principle of low voltage load reduction is described by mathematical method. At the same time, combined with general criteria, different fault types are considered. Carry out configuration design. Finally, through the example analysis of Tianjin power network, the voltage stability is analyzed from the index. The simulation example proves that this method ensures the rapid recovery of the system voltage and the high stability margin. At the same time, the rationality and validity of the method are verified. On the basis of foreign research, this paper analyzes the excellent experience of foreign countries, discusses the present situation in China, and points out the importance of low pressure load reduction and the deficiency of our country at present. Both offline and tuning, there is a gap with excellent advanced technology, and therefore need to be further improved. On this basis, the research content and corresponding research methods are put forward. Through the stability principle analysis and the corresponding mathematical theory, the voltage stability is introduced comprehensively, and the foundation for the further analysis of the low voltage load reduction is also laid. On the basis of the clear principle of voltage stability, the paper discusses the low voltage load reduction carefully and comprehensively, studies the corresponding decision basis and selection method, puts forward the corresponding configuration idea, and gives a simple design scheme. Finally, based on the analysis of the actual power grid in Tianjin area, the common index system is given. At the same time, the example calculation of the described method is carried out in combination with the actual simulation.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM712

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本文編號(hào)：2349235