本文選題：相量測(cè)量單元(PMU)　切入點(diǎn)：廣域測(cè)量系統(tǒng)(WAMS)　出處：《天津大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著智能電網(wǎng)的發(fā)展和電網(wǎng)聯(lián)系日益緊密,維持電力系統(tǒng)的安全穩(wěn)定運(yùn)行變得尤為重要。電力系統(tǒng)振蕩作為一種常見的非正常運(yùn)行狀態(tài),可能造成電網(wǎng)潮流的改變,電壓電流劇烈波動(dòng)甚至系統(tǒng)崩潰,對(duì)系統(tǒng)的安全穩(wěn)定運(yùn)行有著極大影響。因此,對(duì)電力系統(tǒng)振蕩進(jìn)行深入研究,找到有效的振蕩識(shí)別、振蕩中心定位以及失步解列控制方案是保障電力系統(tǒng)安全穩(wěn)定運(yùn)行必不可少的內(nèi)容。目前已有的方案大多基于本地量判斷振蕩與估計(jì)振蕩中心位置,無法適應(yīng)復(fù)雜大電網(wǎng)背景下安全穩(wěn)定運(yùn)行的要求。隨著廣域測(cè)量系統(tǒng)(Wide Area Measurement System,WAMS)、相量測(cè)量單元(Phasor Measurement Unit,PMU)以及高速光纖通信網(wǎng)在電力行業(yè)的應(yīng)用,使得對(duì)廣域信息進(jìn)行綜合和實(shí)時(shí)處理成為可能。WAMS系統(tǒng)能夠提供大范圍的電氣量信息,從而使得振蕩識(shí)別與振蕩中心定位更加及時(shí)準(zhǔn)確。本文提出了一種利用相量測(cè)量單元得到的廣域信息跟蹤振蕩中心的方法,該方法依據(jù)線路兩端母線電壓相量和線路電壓差相量的關(guān)系確定振蕩中心位置并對(duì)其進(jìn)行實(shí)時(shí)跟蹤,不受振蕩中心漂移的影響。當(dāng)系統(tǒng)發(fā)生相繼故障或連續(xù)開斷造成振蕩中心轉(zhuǎn)移時(shí),該方法仍能識(shí)別并跟蹤。在此基礎(chǔ)上,提出了失步振蕩的檢測(cè)判據(jù)及解列控制方案,設(shè)計(jì)了基于廣域測(cè)量系統(tǒng)的距離保護(hù)振蕩閉鎖開放策略。仿真結(jié)果驗(yàn)證了該方法的有效性。
[Abstract]:With the development of smart grid and the increasingly close connection of power grid, it is particularly important to maintain the safe and stable operation of power system. As a common abnormal operation state, power system oscillation may cause power flow change. The sharp fluctuation of voltage and current and even the collapse of the system have great influence on the safe and stable operation of the system. Oscillation center location and out-of-step control scheme are essential to ensure the safe and stable operation of power system. At present, most of the existing schemes are based on local quantities to judge oscillation and estimate the location of oscillation center. With the wide area measurement system wide Area Measurement system WAMS, Phasor Measurement Unitro PMU) and high-speed optical fiber communication network applied in power industry, it can not meet the requirement of safe and stable operation under the background of complex large power network, with the application of wide area measurement system (wide Area Measurement system), Phasor Measurement Unitu (PMU) and high speed optical fiber communication network in power industry. Make it possible to synthesize and process wide area information in real time. WAMS system can provide a wide range of electrical information, In order to make oscillation identification and oscillation center location more timely and accurate, this paper presents a method of tracking oscillation center by using wide area information obtained from phasor measurement unit. According to the relationship between the voltage phasor of two bus and the phase quantity of line voltage difference, this method determines the position of the oscillation center and tracks it in real time. The method can still recognize and track the oscillation center when the oscillation center shifts due to successive faults or continuous interruptions. On the basis of this, the detection criterion and de-listing control scheme of out-of-step oscillation are proposed. A range protection oscillation locking open strategy based on wide area measurement system is designed, and the effectiveness of the method is verified by simulation results.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM712

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本文編號(hào)：1635064