發(fā)布時間：2018-05-20 17:12

  本文選題：區(qū)域一次調(diào)頻評價 + 動態(tài)ACE��； 參考：《大連理工大學》2015年碩士論文

【摘要】：一次調(diào)頻是阻止頻率波動的第一道防線,對于電力系統(tǒng)運行安全和保證運行頻率質(zhì)量至關(guān)重要。目前我國電網(wǎng)廣泛采用的CPS標準,盡管可實現(xiàn)各類調(diào)頻手段綜合控制性能的評價,但不能單獨、準確地評價控制區(qū)域一次調(diào)頻性能。我國的一次調(diào)頻為無償服務(wù),這就導(dǎo)致某些控制區(qū)域閉鎖一次調(diào)頻功能以獲取利益,造成隨著電網(wǎng)頻率控制手段的不斷提高,頻率穩(wěn)定性反而變差的現(xiàn)象。因此,亟需制定針對控制區(qū)域的一次調(diào)頻性能的評價標準,以規(guī)范控制區(qū)域的一次頻率控制行為,從而保障電網(wǎng)運行安全和頻率質(zhì)量。針對上述問題,本文從一次調(diào)頻的動態(tài)過程出發(fā),提出以控制區(qū)域整體的輸出量評價其一次調(diào)頻性能。通過對區(qū)域控制偏差(Area Control Error, ACE)的時間序列解析,得出控制區(qū)域動態(tài)ACE能夠反映該區(qū)域一次調(diào)頻性能。電力系統(tǒng)運行頻率波動、區(qū)域一次調(diào)頻響應(yīng)情況和動態(tài)ACE等參量與擾動位置、擾動幅值、控制區(qū)域一次調(diào)頻參數(shù)等因素之間的關(guān)系異常復(fù)雜,難以解析。為此,本文利用仿真對上述關(guān)系進行探究,分析表明：當在電力系統(tǒng)負荷大擾動位置與幅值一定,從擾動發(fā)生時刻至一次調(diào)頻第一次達到出力極值的時間段內(nèi),動態(tài)ACE不受其他控制區(qū)域一次調(diào)頻性能的影響,能體現(xiàn)該控制區(qū)域一次調(diào)頻性能差異：控制區(qū)域一次調(diào)頻性能與動態(tài)ACE頭半波周期的加權(quán)積分值(即加權(quán)積分ACE, QACE)存在單調(diào)關(guān)系,即區(qū)域一次調(diào)頻性能強,QACE越小基于上述認識,本文提出以離線建模和對比評估的方式對控制區(qū)域一次調(diào)頻性能進行評價。其中,離線建模是構(gòu)造待評價控制區(qū)域的標準仿真模型,模擬擾動后該區(qū)域的一次調(diào)頻情況,并確定可反應(yīng)不同控制區(qū)域一次調(diào)頻性能與加權(quán)積分ACE關(guān)系的對比表格；對比評估是依據(jù)電網(wǎng)運行數(shù)據(jù),計算得出被評價控制區(qū)域,在待評價時段內(nèi)的加權(quán)積分ACE,通過對比運行數(shù)據(jù)與對比表格的差異,明確控制區(qū)域在待評價時段內(nèi)一次調(diào)頻性能的優(yōu)劣。最后,利用數(shù)值仿真,對本文提出的評價方法進行驗證,其結(jié)果表明本文提出的評價方法可行,可較為準確地評價控制區(qū)域整體一次調(diào)頻性能。
[Abstract]:Primary frequency modulation is the first line of defense to prevent frequency fluctuation, which is very important for the safety of power system operation and the guarantee of frequency quality. At present, CPS standard is widely used in Chinese power network, although it can realize the comprehensive control performance evaluation of all kinds of FM means, but it can not evaluate the primary frequency modulation performance of the control area accurately and independently. The primary frequency modulation in our country serves for free, which leads to the locking of the primary frequency modulation function in some control areas to obtain the benefit, resulting in the phenomenon that the frequency stability becomes worse with the continuous improvement of the frequency control means of the power network. Therefore, it is urgent to establish the evaluation standard for the primary frequency modulation performance of the control area, in order to standardize the primary frequency control behavior in the control area, and thus ensure the safety and frequency quality of the power network operation. Based on the dynamic process of primary frequency modulation, this paper proposes to evaluate the performance of primary frequency modulation by the output of the whole control region. By analyzing the time series of the area Control Error, ACE), it is concluded that the dynamic ACE of the control region can reflect the primary frequency modulation performance of the region. The relationship between power system operating frequency fluctuation, regional primary frequency modulation response and dynamic ACE and disturbance position, disturbance amplitude and control region primary frequency modulation parameters is extremely complex and difficult to analyze. In this paper, simulation is used to explore the above relation. The analysis shows that when the position and amplitude of the large disturbance of power system load are fixed, the period from the time of occurrence of disturbance to the first time of reaching the maximum value of output force of the first frequency modulation is obtained. Dynamic ACE is not affected by the primary frequency modulation performance of other control regions. The difference of the primary frequency modulation performance of the control region can be reflected: there is a monotone relationship between the primary frequency modulation performance of the control region and the weighted integral value of the half-wave period of the dynamic ACE head (that is, the weighted integral ACE-QACE), that is, the smaller the regional primary frequency modulation performance is, the smaller the QACE is based on the above understanding. In this paper, off-line modeling and comparative evaluation are used to evaluate the primary frequency modulation performance of the control region. Among them, off-line modeling is the standard simulation model of the control region to be evaluated, which simulates the first frequency modulation of the region after disturbance, and determines the comparative table reflecting the relationship between the primary frequency modulation performance of different control regions and the weighted integral ACE. The contrast evaluation is based on the grid operation data, and calculates the weighted integral ACEs of the evaluated control area in the period of time to be evaluated, and compares the difference between the operation data and the contrast table. The primary frequency modulation performance of the control area is determined in the period to be evaluated. Finally, the numerical simulation is used to verify the evaluation method proposed in this paper. The results show that the proposed evaluation method is feasible and can accurately evaluate the overall primary frequency modulation performance of the control region.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM712

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相關(guān)期刊論文 前1條

1 張恒旭;李常剛;劉玉田;黃志龍;莊侃沁;;電力系統(tǒng)動態(tài)頻率分析與應(yīng)用研究綜述[J];電工技術(shù)學報;2010年11期

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本文編號：1915522