本文選題：特高壓交直流電網(wǎng) + 湖南電網(wǎng)��； 參考：《華北電力大學(xué)》2014年碩士論文

【摘要】：特高壓交、直流工程的建成投產(chǎn)能為一次能源匱乏的湖南輸入電能,減少電力缺額,緩解能源緊張的問題,但也會(huì)給現(xiàn)有電網(wǎng)帶來安全穩(wěn)定運(yùn)行的問題。在接納特高壓送入電力的同時(shí),如何保證受端電網(wǎng)的安全穩(wěn)定運(yùn)行是目前電力系統(tǒng)穩(wěn)定方向的研究重點(diǎn)。而系統(tǒng)的網(wǎng)絡(luò)結(jié)構(gòu)是影響系統(tǒng)穩(wěn)定的決定性因素,因此在規(guī)劃設(shè)計(jì)階段就應(yīng)確定合理的特高壓工程建設(shè)時(shí)序,以提高網(wǎng)絡(luò)結(jié)構(gòu)的可靠性和系統(tǒng)的安全穩(wěn)定水平。 本文首先簡(jiǎn)單闡述了湖南省的經(jīng)濟(jì)發(fā)展?fàn)顩r以及湖南電網(wǎng)的現(xiàn)狀及特點(diǎn),并分析了湖南電網(wǎng)目前存在的主要問題：一次能源缺乏,電力供應(yīng)緊張；電源布局欠合理,受端系統(tǒng)支撐不足；水電比重偏大,增加電網(wǎng)運(yùn)行方式調(diào)整難度；區(qū)外輸入電量大幅增加,省間聯(lián)絡(luò)線長期重載運(yùn)行。然后基于湖南電網(wǎng)2015年的電力需求預(yù)測(cè)結(jié)果,在無特高壓投產(chǎn)的前提下進(jìn)行電力電量平衡分析,發(fā)現(xiàn)湖南電網(wǎng)將出現(xiàn)電力供應(yīng)缺口。而特高壓的接入則可消除這一狀況,減輕省間聯(lián)絡(luò)線上的潮流。另外,本文還從湖南電網(wǎng)的經(jīng)營效益和購電成本兩方面,分析了特高壓工程入湘的經(jīng)濟(jì)性,證實(shí)特高壓輸電具有良好的經(jīng)濟(jì)性。 基于湖南電網(wǎng)2015年的規(guī)劃數(shù)據(jù),本文選取了夏季大負(fù)荷方式下的負(fù)荷水平,運(yùn)用PSASP軟件搭建了特高壓交流先投產(chǎn)和特高壓直流先投產(chǎn)兩種建設(shè)時(shí)序的電網(wǎng)網(wǎng)架。然后,對(duì)各方案進(jìn)行潮流計(jì)算、短路計(jì)算、靜態(tài)安全分析和暫態(tài)穩(wěn)定分析,以此分析評(píng)價(jià)各網(wǎng)架方案的合理性。此外,對(duì)計(jì)算中各方案電網(wǎng)出現(xiàn)的主要問題進(jìn)行對(duì)比分析,并提出解決措施。通過比較兩方案的計(jì)算分析結(jié)果,不難發(fā)現(xiàn)優(yōu)先建設(shè)特高壓交流線路更有利于湖南電網(wǎng)的安全穩(wěn)定運(yùn)行,且能提高省間聯(lián)絡(luò)線的輸電能力。
[Abstract]:UHV AC, DC project can input electric energy for Hunan, which is short of primary energy, reduce the shortage of electric power and alleviate the problem of energy shortage, but it will also bring the problem of safe and stable operation to the existing power network. At the same time, how to ensure the safe and stable operation of the receiving power network is the focus of the research on the direction of power system stability. The network structure of the system is the decisive factor to influence the stability of the system. Therefore, the reasonable sequence of UHV project construction should be determined in the planning and design stage in order to improve the reliability of the network structure and the level of safety and stability of the system. In this paper, the economic development of Hunan Province and the current situation and characteristics of Hunan Power Grid are briefly described, and the main problems of Hunan Power Grid are analyzed: the lack of primary energy, the shortage of power supply, the unreasonable distribution of power supply. The receiving end system is not supported enough; the proportion of hydropower is on the high side, which makes it difficult to adjust the operation mode of the power grid; the input electricity quantity outside the area increases substantially, and the inter-provincial tie-line runs for a long time. Then, based on the forecast results of Hunan power demand in 2015, the power balance analysis without UHV is carried out, and it is found that there will be a shortage of power supply in Hunan power grid. The UHV access can eliminate this situation and alleviate the interprovincial tie-line trend. In addition, this paper also analyzes the economy of UHV project entering Hunan province from the aspects of operation benefit and purchase cost of Hunan power grid, and proves that UHV transmission has good economy. Based on the planning data of Hunan Power Grid in 2015, this paper selects the load level under the heavy load mode in summer, and uses PSASP software to set up two kinds of grid structure of UHV AC first production and UHV DC first put into production. Then, power flow calculation, short-circuit calculation, static safety analysis and transient stability analysis are carried out to analyze and evaluate the rationality of each scheme. In addition, the main problems in each scheme are compared and analyzed, and the solutions are put forward. By comparing the results of calculation and analysis of the two schemes, it is not difficult to find that priority construction of UHV AC lines is more conducive to the safe and stable operation of Hunan Power Grid, and can improve the transmission capacity of inter-provincial tie lines.
【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)】：TM711

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本文編號(hào)：1981169