發(fā)布時(shí)間：2018-01-07 08:19

  本文關(guān)鍵詞：時(shí)間同步方式及同步偏差對(duì)同步相量量測(cè)的影響研究　出處：《華北電力大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

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【摘要】：同步相量測(cè)量單元(Phasor Measurement Unit, PMU)已成為目前電力系統(tǒng)動(dòng)態(tài)過(guò)程監(jiān)測(cè)的基礎(chǔ)手段。由于PMU的本質(zhì)特征是同步量測(cè),因而高精度、可靠、安全的時(shí)間同步信息對(duì)PMU的量測(cè)具有重要意義。當(dāng)前,隨著我國(guó)北斗二代衛(wèi)星導(dǎo)航系統(tǒng)投入運(yùn)行,智能變電站逐步推廣應(yīng)用,PMU的時(shí)間同步信息來(lái)源正在發(fā)生變化,由GPS站間同步發(fā)展為綜合北斗二代的衛(wèi)星同步與站內(nèi)網(wǎng)絡(luò)同步的方式,因此研究時(shí)間同步方式、時(shí)間同步偏差及其對(duì)PMU量測(cè)的影響,對(duì)于實(shí)現(xiàn)大電網(wǎng)有效的動(dòng)態(tài)安全監(jiān)測(cè),保障系統(tǒng)安全運(yùn)行具有至關(guān)重要的意義。論文針對(duì)北斗二代授時(shí)產(chǎn)品的準(zhǔn)確性、可靠性和安全性三個(gè)特性,搭建了北斗二代時(shí)間同步特性測(cè)試平臺(tái),開(kāi)展了站間同步特性研究；重點(diǎn)對(duì)時(shí)間同步偏差和抖動(dòng)的產(chǎn)生原因進(jìn)行了分析,針對(duì)時(shí)間同步偏差和抖動(dòng)現(xiàn)象,給出了北斗二代授時(shí)產(chǎn)品的改進(jìn)建議,并利用同步特性初步分析了其對(duì)PMU量測(cè)可能產(chǎn)生的影響。隨后針對(duì)站內(nèi)同步方式,從精確時(shí)間協(xié)議(Precision Time Protocol, PTP)同步算法的原理出發(fā),研究了影響PTP同步精度的因素,基于搭建的智能變電站時(shí)間同步模擬測(cè)試平臺(tái),對(duì)PTP同步特性開(kāi)展了研究。反映出1588設(shè)備在不同的延時(shí)測(cè)量機(jī)制、不同的時(shí)鐘同步模式、交換機(jī)引入網(wǎng)絡(luò)情況下時(shí)間同步精度出現(xiàn)的差異,以及在面向通用對(duì)象的變電站事件(Generic Object Oriented Substation Event, GOOSE)報(bào)文和采樣值(Sampled Value, SV)報(bào)文形成的網(wǎng)絡(luò)風(fēng)暴影響下表現(xiàn)出的同步特性,并分析了其對(duì)PMU量測(cè)可能產(chǎn)生的影響。同時(shí),針對(duì)站間同步方式和站內(nèi)同步方式可能引起的時(shí)間同步偏差,對(duì)PMU量測(cè)相量產(chǎn)生的影響進(jìn)行了分析。通過(guò)變電站PMU和發(fā)電廠(chǎng)PMU分別展開(kāi)了討論,重點(diǎn)推導(dǎo)了系統(tǒng)動(dòng)態(tài)情況下考慮時(shí)間同步偏差的變電站PMU量測(cè)相量計(jì)算公式,分析了時(shí)間同步偏差對(duì)相量量測(cè)的影響規(guī)律；除此之外,利用發(fā)電廠(chǎng)PMU量測(cè)轉(zhuǎn)子角原理,分析了系統(tǒng)處于穩(wěn)態(tài)及動(dòng)態(tài)情況下發(fā)電廠(chǎng)PMU實(shí)測(cè)發(fā)電機(jī)轉(zhuǎn)子角與時(shí)間同步偏差的關(guān)系。同時(shí),搭建了物理實(shí)驗(yàn)平臺(tái),進(jìn)行了穩(wěn)態(tài)和動(dòng)態(tài)實(shí)驗(yàn),驗(yàn)證了理論分析的正確性。
[Abstract]:Phasor measurement unit (Phasor Measurement Unit, PMU) has become the basic means of the monitoring process of power system dynamic. Due to the nature of PMU is synchronous measurement, and high precision, reliable, secure time synchronization information for PMU measurement is of great significance. When, as China's two generation Beidou satellite the navigation system of intelligent substation put into operation, gradually promote the application of PMU time synchronization information source is changed by GPS time synchronization for the integrated development of the Beidou satellite synchronized with the two generation station network synchronization mode, so the research of time synchronization, time synchronization error and influence on PMU measurement, for the realization of dynamic security monitoring the large power grid effectively, is of vital significance to guarantee the safe operation of the system. According to the two generation products of the Beidou timing accuracy, three characteristics of reliability and safety, set up north Bucket two generation time synchronization test platform, carried out the research of synchronization between stations; focus on the causes of time synchronization error and jitter are analyzed, aiming at the time synchronization error and jitter phenomenon, suggestions are given two generation Beidou timing products, and the use of synchronization of a preliminary analysis of its possible impact on measurement the amount of PMU. Then according to the station synchronization mode, from the precision time protocol (Precision Time Protocol, PTP) the principle of synchronization algorithm, study the influence factors of PTP synchronization accuracy, intelligent substation based on time synchronization simulation test platform of PTP synchronous properties has been studied. Reflect 1588 devices in the delay measurement mechanism the clock synchronization patterns, switch into difference time synchronization accuracy under network conditions, and in what a generic object oriented substation (Generic Obj Ect Oriented Substation Event GOOSE (Sampled) and packet sampling value Value, SV) showed the synchronization characteristics of the network storm formed under the influence of the message, and analyzes the influence of measurement possible on PMU. At the same time, according to the time synchronization and synchronization station can cause the time synchronization error, influence the amount of PMU measurement has been analyzed. Through the PMU substation and power plant PMU were discussed, focusing on substation PMU amount of time synchronization error system considering the dynamic situation of measuring phasor calculation formulas are deduced, and analyzes the influence of deviation between synchronous phasor measurement; in addition, measurement the rotor angle by using the principle of power plant PMU, analyzes the system in factory PMU measured rotor angle and time synchronization error generation of static and dynamic conditions. At the same time, to build a physical experiment platform, the steady state The correctness of the theoretical analysis is verified by the dynamic experiment.

【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】：2015
【分類(lèi)號(hào)】：TM933.313

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本文編號(hào)：1391739