【摘要】：隨著我國巨型風(fēng)電基地的規(guī)劃建設(shè),將會(huì)有更多大規(guī)模風(fēng)場(chǎng)接入電網(wǎng),主要采取“風(fēng)火打捆”的形式將風(fēng)電送出消納。“風(fēng)火打捆”外送系統(tǒng)運(yùn)行方式多變,電網(wǎng)的頻率和電壓特性影響因素多且影響關(guān)系復(fù)雜。風(fēng)電功率波動(dòng)下的火電機(jī)組調(diào)頻控制策略,變電站SVC和可控高抗電壓控制策略制定難度較大。因此研究“風(fēng)火打捆”外送系統(tǒng)網(wǎng)源之間的相互協(xié)調(diào)具有重要意義。 本文分析了風(fēng)電機(jī)組控制模型和火電機(jī)組控制模型的基本結(jié)構(gòu),建立了一個(gè)具有典型意義的“風(fēng)火打捆”仿真分析系統(tǒng),比較了超臨界機(jī)組和亞臨界機(jī)組控制特性差異,深入分析了固速風(fēng)機(jī)在電網(wǎng)短路故障下發(fā)生轉(zhuǎn)速失穩(wěn)被過速保護(hù)切除的機(jī)理。以甘肅河西電網(wǎng)中一個(gè)同時(shí)包含風(fēng)電和火電的外送地區(qū)為實(shí)例,分析了該地區(qū)與主網(wǎng)發(fā)生解列故障時(shí)火電機(jī)組一次調(diào)頻特性、OPC反復(fù)動(dòng)作原因及應(yīng)對(duì)策略。針對(duì)風(fēng)機(jī)群體性脫網(wǎng)故障,提出了一種緊急提升火電機(jī)組功率的系統(tǒng)頻率控制策略,通過監(jiān)測(cè)風(fēng)機(jī)脫網(wǎng)量和火電機(jī)組有效旋轉(zhuǎn)備用量,計(jì)算火電機(jī)組的緊急提升功率量,將機(jī)組CCS由正常AGC控制切換為緊急提升功率的控制,實(shí)現(xiàn)減小系統(tǒng)頻率波動(dòng)幅度、提高頻率穩(wěn)定性的效果,該策略的效果通過仿真進(jìn)行了驗(yàn)證。分析了酒泉風(fēng)電場(chǎng)和疆電外送一、二通道配置的FACTS裝置類型和工作原理,基于風(fēng)機(jī)脫網(wǎng)故障的仿真,研究了FACTS裝置對(duì)于抑制電壓波動(dòng)的效果,并對(duì)酒泉風(fēng)電基地配套規(guī)劃的大型火電機(jī)組在加強(qiáng)勵(lì)磁系統(tǒng)抑制風(fēng)機(jī)脫網(wǎng)時(shí)電壓波動(dòng)效果方面提出了配置建議。
[Abstract]:With the planning and construction of the giant wind power base in China, more large-scale wind fields will be connected to the power grid, and the wind power will be sent out and absorbed mainly in the form of "wind and fire bundles". The operation mode of "wind and fire bundling" outgoing transmission system is changeable, and the frequency and voltage characteristics of power network are affected by many factors and the influence relationship is complex. It is difficult to formulate the frequency modulation control strategy of thermal power unit under the fluctuation of wind power, substation SVC and controllable high robust voltage control strategy. Therefore, it is of great significance to study the coordination between the network sources of wind and fire bundles. In this paper, the basic structure of wind turbine control model and thermal power unit control model is analyzed, a typical simulation analysis system of "wind and fire bundling" is established, and the difference of control characteristics between supercritical unit and subcritical unit is compared. In this paper, the mechanism of the speed instability of the fixed speed fan is removed by overspeed protection under the short circuit fault of the power network. Taking an outgoing area of Hexi power grid in Gansu province as an example, the primary frequency modulation characteristic of thermal power unit, the cause of repeated action of OPC and the countermeasures are analyzed when there is a break-up fault between this area and the main network. In view of the fan group breakaway fault, a system frequency control strategy is proposed to increase the power of thermal power unit urgently. By monitoring the amount of fan detachable and the effective rotating reserve of thermal power unit, the emergency lifting power of thermal power unit is calculated. The CCS of the unit is switched from normal AGC control to emergency lifting power control to reduce the frequency fluctuation amplitude of the system and to improve the frequency stability. The effect of the strategy is verified by simulation. This paper analyzes the type and working principle of the FACTS device configured by Jiuquan wind farm and Xinjiang electricity outputting, and studies the effect of the FACTS device on restraining voltage fluctuation based on the simulation of fan detachable fault. Some suggestions on how to strengthen the excitation system to restrain the voltage fluctuation when the fan is off the grid are put forward for the large thermal power units which are planned for Jiuquan wind power base.
【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

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 王云飛;王智冬;;內(nèi)蒙古東部千萬千瓦級(jí)風(fēng)電基地開發(fā)外送方案[J];能源技術(shù)經(jīng)濟(jì);2012年03期

2 高林;戴義平;馬慶中;張龍英;;特高壓線路解列后區(qū)域互聯(lián)電網(wǎng)一次調(diào)頻穩(wěn)定性研究[J];電網(wǎng)技術(shù);2009年20期

3 柳偉;顧偉;;雙饋風(fēng)電機(jī)組一次調(diào)頻技術(shù)研究[J];電氣應(yīng)用;2013年08期

4 吳子雙;于繼來;彭喜云;;高風(fēng)速段次優(yōu)功率追蹤方式的風(fēng)電調(diào)頻方法[J];電工技術(shù)學(xué)報(bào);2013年05期

5 張琳;葉丹丹;胡葉舟;肖馳夫;;用于特/超高壓電網(wǎng)電壓控制的分級(jí)投切式可控高抗控制策略[J];電網(wǎng)與清潔能源;2012年02期

6 黃衛(wèi)劍;張曦;陳世和;陳銳民;;提高火電機(jī)組一次調(diào)頻響應(yīng)速度[J];中國電力;2011年01期

7 鐘勝;郭相國;田昕;李泰軍;;哈密至鄭州特高壓直流對(duì)受端電網(wǎng)影響分析[J];中國電力;2012年11期

，

本文編號(hào)：2289902