【摘要】：能源和環(huán)境問題是本世紀(jì)最具挑戰(zhàn)性的問題之一,為了應(yīng)對(duì)這一挑戰(zhàn),開發(fā)和利用可再生能源成了世界各國(guó)的共同選擇。按照我國(guó)目前對(duì)能源的消耗速度,傳統(tǒng)的化學(xué)資源在多年之后將面臨枯竭,尋找替代化學(xué)能源及利用可再生能源成為我國(guó)經(jīng)濟(jì)發(fā)展的決定力量。近年來政府大力推進(jìn)風(fēng)能、太陽(yáng)能、小水電、生物質(zhì)能的發(fā)展,以期改變對(duì)傳統(tǒng)化學(xué)能源的依賴。 風(fēng)力發(fā)電,就是我們利用風(fēng)能最常見的形式。風(fēng)能是太陽(yáng)輻射下流動(dòng)所形成的,與其他能源相比,具有明顯的優(yōu)勢(shì),它蘊(yùn)藏量大,分布廣泛；風(fēng)能具有間歇性、不穩(wěn)定性,造成風(fēng)電場(chǎng)接入電網(wǎng)后會(huì)對(duì)電網(wǎng)的運(yùn)行產(chǎn)生巨大影響。同時(shí),解決風(fēng)電這種新型電源入網(wǎng)難題,也是智能電網(wǎng)今后發(fā)展的一個(gè)方向。 大規(guī)模風(fēng)電接入系統(tǒng)后,對(duì)原有的220kV輸電網(wǎng)繼電保護(hù)和安全自動(dòng)裝置運(yùn)行的勢(shì)必產(chǎn)生影響,聯(lián)網(wǎng)線路的快速保護(hù)配置方案將輸電網(wǎng)原有的縱聯(lián)保護(hù)改造為系統(tǒng)側(cè)單端的距離保護(hù)及零序電流保護(hù),這是風(fēng)電場(chǎng)接入電網(wǎng)時(shí),其并網(wǎng)線路保護(hù)存在的統(tǒng)一問題。隨著風(fēng)電并網(wǎng)容量的逐年增大,非常有必要討論其對(duì)現(xiàn)有繼電保護(hù)的影響,從而調(diào)整相應(yīng)的保護(hù)系統(tǒng),使其能更好地配合現(xiàn)有的保護(hù)裝置。 本文以雞西電網(wǎng)運(yùn)行方式及電網(wǎng)參數(shù)、密山風(fēng)力發(fā)電站風(fēng)電機(jī)群參數(shù)為依據(jù),對(duì)密山變電站的220kV母線故障及密山風(fēng)電場(chǎng)220kV母線故障進(jìn)行了計(jì)算,評(píng)價(jià)當(dāng)前保護(hù)的配置及整定計(jì)算中存在的問題。 風(fēng)電接入系統(tǒng)后,為達(dá)到快速切除聯(lián)網(wǎng)線路故障,對(duì)配置主保護(hù)和后備保護(hù)的必要性進(jìn)行了詳細(xì)闡述,指出風(fēng)電接入后傳統(tǒng)的微機(jī)保護(hù)已不再滿足運(yùn)行要求；同時(shí),對(duì)風(fēng)電接入后縱聯(lián)保護(hù)以及后備保護(hù)的影響進(jìn)行定性分析；針對(duì)過渡電阻引起的附加阻抗做定性分析；并在分析基礎(chǔ)上提出雙端故障測(cè)距方法。 接下來,按照繼電保護(hù)配置要求及繼電保護(hù)整定原則,密山風(fēng)電場(chǎng)接入雞西220kV電網(wǎng)對(duì)繼電保護(hù)裝置的影響做定性評(píng)價(jià)；在風(fēng)電電源狀態(tài)轉(zhuǎn)換情況下正反方向?qū)ΨQ和不對(duì)稱故障,詳細(xì)論證電網(wǎng)端和風(fēng)電場(chǎng)端各保護(hù)的動(dòng)作情況。針對(duì)當(dāng)前的密山風(fēng)電場(chǎng)保護(hù)配置狀況,提出風(fēng)電接入雞西220kV電網(wǎng),其保護(hù)功能配置改善及整定計(jì)算過程中需要注意的問題。 論文課題來自生產(chǎn)實(shí)踐密切關(guān)注的問題。這些問題的深入探討和解決可為風(fēng)電的并網(wǎng)線保護(hù)的配置和整定實(shí)踐提供若干參考依據(jù),并對(duì)黑龍江省風(fēng)電與電網(wǎng)的協(xié)調(diào)發(fā)展起到促進(jìn)作用。
[Abstract]:Energy and environment is one of the most challenging problems in this century. In order to meet this challenge, the development and utilization of renewable energy has become a common choice in the world. According to the current consumption rate of energy in China, the traditional chemical resources will be exhausted after many years, so finding alternative chemical energy and using renewable energy becomes the decisive force for the economic development of our country. In recent years, the government has vigorously promoted the development of wind, solar, small hydropower, biomass energy, in order to change the dependence on traditional chemical energy. Wind power is the most common form of wind power we use. Wind energy is formed by the flow of solar radiation. Compared with other energy sources, wind energy has obvious advantages, it has a large potential and wide distribution. Wind energy is intermittent and unstable, which will have a great impact on the operation of power grid after the wind farm is connected to the power grid. At the same time, solving the problem of wind power, which is a new type of power supply, is also a direction of smart grid development in the future. After large-scale wind power is connected to the system, it is bound to have an impact on the operation of the relay protection and safety automatic devices in the original 220kV transmission network. The scheme of fast protection configuration of connected lines transforms the original longitudinal protection of transmission network into single-terminal distance protection and zero-sequence current protection, which is a unified problem when wind farm is connected to the power network and its grid-connected line protection exists. With the increase of wind power grid capacity year by year, it is necessary to discuss its influence on the existing relay protection, so as to adjust the corresponding protection system and make it more suitable for the existing protective devices. Based on the operation mode and power network parameters of Jixi power grid and the wind power cluster parameters of Mishan wind power station, this paper calculates the 220kV busbar fault of Mishan substation and the 220kV busbar fault of Mishan wind farm. The problems existing in the configuration and setting calculation of current protection are evaluated. After wind power access system, in order to quickly remove the fault of network line, the necessity of installing main protection and backup protection is expounded in detail, and it is pointed out that the traditional microcomputer protection no longer meets the requirements of operation after wind power access. At the same time, the influence of longitudinal protection and backup protection after wind power access is analyzed qualitatively; the additional impedance caused by transition resistance is analyzed qualitatively; and a two-terminal fault location method is proposed based on the analysis. Then, according to the requirements of relay protection configuration and the principle of relay protection setting, the impact of Mishan wind farm connected to Jixi 220kV power grid on relay protection device is evaluated qualitatively. In the case of wind power source state conversion, the forward and negative symmetric and asymmetric faults are discussed in detail, and the actions of each protection at the end of power grid and wind farm are discussed in detail. In view of the current situation of protection configuration of Mishan wind farm, the paper puts forward some problems that should be paid attention to in the process of improving the configuration of protection function and setting calculation when wind power is connected to Jixi 220kV power grid. The topic of the thesis comes from the problem that the production practice pays close attention to. The discussion and solution of these problems can provide some reference basis for the configuration and setting practice of wind power line protection and promote the coordinated development of wind power and power grid in Heilongjiang Province.
【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)】：TM614;TM77

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本文編號(hào)：2394580