本文選題：局部耦合 + 雙回輸電線路　； 參考：《華南理工大學(xué)》2014年碩士論文

【摘要】：同塔并架輸電方式是我國(guó)電網(wǎng)建設(shè)的必然趨勢(shì)，然而我國(guó)大多數(shù)的雙回輸電線路為局部耦合的情況，其故障分析與保護(hù)整定策略是電網(wǎng)安全穩(wěn)定運(yùn)行的重要基礎(chǔ)。由于局部耦合雙回線路之間存在著復(fù)雜的零序耦合，其故障分析方法存在特殊性，而傳統(tǒng)保護(hù)未考慮局部耦合的影響，保護(hù)難以保證動(dòng)作的正確性。因此，本文主要針對(duì)連接三端系統(tǒng)的局部耦合雙回輸電線路的解耦方法、故障分析方法、零序電流保護(hù)特性分析、局部耦合對(duì)零序保護(hù)的影響和保護(hù)整定策略進(jìn)行深入研究。主要研究?jī)?nèi)容如下： 1.基于單回輸電線路、耦合雙回輸電線路的解耦理論與方法，構(gòu)建單回線路、耦合雙回線路的電壓、電流各模量方程，并通過建立各耦合分界點(diǎn)電壓、電流各模量的接口方程，聯(lián)合不同接地故障情況下的故障邊界條件方程，實(shí)現(xiàn)一種基于三端電氣量的局部耦合雙回輸電線路故障分析算法。所提方法無(wú)需構(gòu)造復(fù)合序網(wǎng)，具有良好的通用性與實(shí)用性，為本文對(duì)局部耦合線路接地故障對(duì)零序保護(hù)的影響分析奠定理論基礎(chǔ)�；贏TP/EMTP建立的三端局部耦合雙回輸電線路系統(tǒng)模型進(jìn)行了全面的仿真驗(yàn)證。 2.為研究局部耦合線路接地故障對(duì)零序保護(hù)的影響，選取典型的局部耦合雙回輸電線路，基于三端局部耦合雙回輸電線路故障分析計(jì)算方法，在不同故障位置情況下，針對(duì)線路各端的零序保護(hù)進(jìn)行動(dòng)作特性分析。 3.針對(duì)雙回線路局部耦合對(duì)零序保護(hù)的影響進(jìn)行故障特征分析，基于三端局部耦合雙回輸電線路故障分析計(jì)算方法，建立了局部耦合雙回輸電線路故障特征表，包含：局部耦合率、兩端系統(tǒng)阻抗比、故障過渡電阻等因素下故障位置與故障零序分量的關(guān)系。利用該信息庫(kù)，分析了在不同的局部耦合率與不同系統(tǒng)阻抗比等情況下，雙回線路的局部耦合對(duì)零序保護(hù)的影響，呈現(xiàn)出局部耦合率、系統(tǒng)阻抗比和零序電流超越比三者之間的相互制約關(guān)系，為規(guī)劃、運(yùn)方和繼電保護(hù)部門起指導(dǎo)決策作用。 4.基于上述保護(hù)動(dòng)作特性分析，本文提出了局部耦合雙回線路各側(cè)零序保護(hù)配置新方案，及其整定計(jì)算原則。重新分析其保護(hù)四性，并對(duì)新方案的零序保護(hù)進(jìn)行了靈敏性校驗(yàn)�；贏TP/EMTP構(gòu)建了三端局部耦合雙回輸電線路仿真模型；通過全面的仿真分析驗(yàn)證了各側(cè)零序電流保護(hù)整定策略的可行性。 本文研究工作得到了國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目（51307065），，博士學(xué)科點(diǎn)專項(xiàng)科研基金（20100172120033）的資助。
[Abstract]:It is an inevitable trend of power grid construction in our country to share the same tower and parallel transmission line. However, most of the double circuit transmission lines in our country are locally coupled, and their fault analysis and protection setting strategy are the important basis for the safe and stable operation of the power network. Because of the complex zero-sequence coupling between the local coupling double-circuit lines, the fault analysis method has its particularity, but the traditional protection does not consider the influence of local coupling, so it is difficult to ensure the correctness of the operation. Therefore, this paper mainly focuses on the decoupling method, fault analysis method, zero-sequence current protection characteristic analysis, the effect of local coupling on zero-sequence protection and protection tuning strategy. The main contents are as follows: 1. Based on the decoupling theory and method of single circuit transmission line and coupled double circuit transmission line, the equations of voltage and current moduli of single circuit line and coupled double circuit transmission line are constructed, and the interface equations of voltage and current modulus of each coupling boundary point are established. A fault analysis algorithm for local coupled double-circuit transmission lines based on three-terminal electrical quantities is realized by combining the fault boundary condition equations of different grounding faults. The proposed method does not need to construct a composite sequence network and has good generality and practicability, which lays a theoretical foundation for the analysis of the effect of the local coupling line grounding fault on the zero-sequence protection in this paper. The three-terminal local coupling double-circuit transmission line system model based on ATP / EMTP is verified by simulation. 2. In order to study the effect of local coupling line grounding fault on zero-sequence protection, a typical local coupling double circuit transmission line is selected, and based on the fault analysis and calculation method of three-terminal local coupling double circuit transmission line, under different fault locations, The operation characteristics of zero sequence protection at each end of the line are analyzed. 3. According to the fault characteristic analysis of local coupling on zero-sequence protection, based on the fault analysis calculation method of three-terminal local coupling double-circuit transmission line, the fault characteristic table of local coupling double-circuit transmission line is established. The relationship between the fault location and the zero sequence component of the fault is included: the local coupling ratio, the impedance ratio between the two ends of the system, and the fault transition resistance. By using this information base, the effect of local coupling on zero-sequence protection is analyzed under different local coupling rates and impedance ratios of different systems, and the local coupling rate is presented. The relationship between impedance ratio and zero-sequence current transcendence ratio of the system plays a guiding role in decision-making for planning, transportation and relay protection departments. 4. Based on the analysis of the operation characteristics of the protection, a new scheme of zero-sequence protection for each side of the local coupling double-circuit line is proposed, and the principle of setting calculation is also presented in this paper. The four features of the new scheme are analyzed again, and the sensitivity of the zero sequence protection of the new scheme is verified. A three-terminal local coupling double-circuit transmission line simulation model based on ATP / EMTP is constructed, and the feasibility of zero-sequence current protection tuning strategy is verified by comprehensive simulation analysis. The research is supported by the National Natural Science Foundation of China (51307065) and the Ph. D. Research Foundation (20100172120033).
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM75

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉為雄;蔡澤祥;邱建;;融合對(duì)稱分量法與相分量法的大規(guī)模電力系統(tǒng)跨線故障計(jì)算[J];電工技術(shù)學(xué)報(bào);2007年05期

2 徐建國(guó);對(duì)國(guó)外超高壓同塔多回送電線路技術(shù)的調(diào)研分析[J];電力建設(shè);2001年07期

3 范新;張海;;簡(jiǎn)單故障下同桿并架雙回線零序互感對(duì)零序電流影響分析[J];電力科學(xué)與工程;2011年09期

4 索南;葛耀中;;利用六序分量復(fù)合序網(wǎng)法分析同桿雙回線斷線故障的新方法[J];電力系統(tǒng)自動(dòng)化;1992年03期

5 傅旭,王錫凡;同桿雙回線斷相故障計(jì)算的解耦相分量法[J];電力系統(tǒng)自動(dòng)化;2004年06期

6 傅旭,王錫凡;同桿雙回線跨線短路故障計(jì)算的等值雙端電源相分量法[J];電力系統(tǒng)自動(dòng)化;2004年07期

7 龔震東;范春菊;郁惟鏞;田羽;;一種基于六序網(wǎng)圖的同桿雙回線故障測(cè)距算法[J];電力系統(tǒng)自動(dòng)化;2007年17期

8 田羽;范春菊;龔震東;;同桿4回線12序分量法[J];電力系統(tǒng)自動(dòng)化;2007年21期

9 鄧孟華;范春菊;劉玲;舒巧俊;龔震東;涂崎;;基于12序分量的同桿4回線短路故障計(jì)算[J];電力系統(tǒng)自動(dòng)化;2008年14期

10 王安寧;陳青;周占平;湯少偉;;改進(jìn)的相分量法求解同桿雙回線故障新算法[J];電力系統(tǒng)自動(dòng)化;2009年13期

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