本文選題：孤網(wǎng)運(yùn)行 + 穩(wěn)定計算�。� 參考：《華北電力大學(xué)》2014年碩士論文

【摘要】：電力系統(tǒng)孤網(wǎng)運(yùn)行時,由于其機(jī)組數(shù)量少,機(jī)組容量小,系統(tǒng)穩(wěn)定性差,各種故障情況下往往會造成系統(tǒng)頻率大幅波動,甚至引起機(jī)組跳閘,大面積停電,造成嚴(yán)重?fù)p失。本文針對中電投集團(tuán)蒙東能源公司霍煤鴻駿鋁電公司的孤立電網(wǎng),進(jìn)行了系統(tǒng)安全穩(wěn)定控制技術(shù)的研究。 首先,闡述了孤立電網(wǎng)的網(wǎng)架結(jié)構(gòu)、保護(hù)配置、安全穩(wěn)定控制裝置配置和與其他相關(guān)專業(yè)的配合情況。 其次,針對該公司孤立電網(wǎng)分別進(jìn)行了在不同風(fēng)力出電情況下,發(fā)生線路故障、火電機(jī)組故障、風(fēng)電全�；蝻L(fēng)電送出線故障和電解鋁負(fù)荷故障對系統(tǒng)穩(wěn)定情況影響的計算分析,對結(jié)果進(jìn)行了總結(jié),發(fā)現(xiàn)在發(fā)生故障時極易造成頻率失穩(wěn)的問題。對影響該孤立電網(wǎng)系統(tǒng)頻率穩(wěn)定的原因進(jìn)行了分析,認(rèn)為孤立電網(wǎng)系統(tǒng)出現(xiàn)故障時,火電機(jī)組和風(fēng)電機(jī)組發(fā)出的功率與電解鋁負(fù)荷吸收的功率不平衡是造成頻率失穩(wěn)的根本原因。 最后,對孤立電網(wǎng)運(yùn)行的頻率特點(diǎn)進(jìn)行了闡述,對孤立電網(wǎng)運(yùn)行情況下一次調(diào)頻、二次調(diào)頻、高頻切機(jī)和低頻減載等頻率穩(wěn)定控制措施進(jìn)行了分析,并針對該公司孤立電網(wǎng)系統(tǒng),提出采取切火電機(jī)組、切風(fēng)機(jī)、切負(fù)荷整流變、切整期負(fù)荷等策略解決頻率失穩(wěn)的問題,并提出一系列完善的解決方案。
[Abstract]:In the operation of power system isolated network, due to its small number of units, small unit capacity, poor system stability, all kinds of failures will often cause large fluctuations in system frequency, even cause unit tripping, large area power failure, causing serious losses. In this paper, the system safety and stability control technology is studied for the isolated power grid of Huo Coal Hongjun Aluminium Power Company, Mendong Energy Company of China Electric Power Investment Group. Firstly, the network structure, protection configuration, safety and stability control device configuration of isolated power grid and the cooperation with other related majors are described. Secondly, according to the isolated power grid of the company, the influence of line fault, thermal power unit fault, wind power shutdown or wind power supply line fault and electrolytic aluminum load fault on the stability of the system are calculated and analyzed separately under different wind power generation conditions. The results are summarized and it is found that frequency instability is easy to occur in the event of failure. The reasons that affect the frequency stability of the isolated grid system are analyzed, and it is considered that when the isolated grid system fails, The fundamental cause of frequency instability is the imbalance between the power emitted by thermal power unit and wind turbine and the power absorbed by electrolytic aluminum load. Finally, the frequency characteristics of the isolated power network are expounded, and the frequency stability control measures such as primary frequency modulation, secondary frequency modulation, high frequency cutting machine and low frequency load reduction are analyzed. Aiming at the isolated power system of the company, this paper puts forward some strategies to solve the problem of frequency instability, such as shedding thermal power unit, cutting fan, load shedding rectifier and cutting load during the whole period, and puts forward a series of perfect solutions.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM712

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