發(fā)布時間：2018-01-07 08:19

  本文關鍵詞：時間同步方式及同步偏差對同步相量量測的影響研究　出處：《華北電力大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 北斗二代衛(wèi)星導航系統(tǒng) IEC 61588 時間同步偏差 同步相量測量單元 離散傅里葉變換

【摘要】：同步相量測量單元(Phasor Measurement Unit, PMU)已成為目前電力系統(tǒng)動態(tài)過程監(jiān)測的基礎手段。由于PMU的本質特征是同步量測,因而高精度、可靠、安全的時間同步信息對PMU的量測具有重要意義。當前,隨著我國北斗二代衛(wèi)星導航系統(tǒng)投入運行,智能變電站逐步推廣應用,PMU的時間同步信息來源正在發(fā)生變化,由GPS站間同步發(fā)展為綜合北斗二代的衛(wèi)星同步與站內網(wǎng)絡同步的方式,因此研究時間同步方式、時間同步偏差及其對PMU量測的影響,對于實現(xiàn)大電網(wǎng)有效的動態(tài)安全監(jiān)測,保障系統(tǒng)安全運行具有至關重要的意義。論文針對北斗二代授時產品的準確性、可靠性和安全性三個特性,搭建了北斗二代時間同步特性測試平臺,開展了站間同步特性研究；重點對時間同步偏差和抖動的產生原因進行了分析,針對時間同步偏差和抖動現(xiàn)象,給出了北斗二代授時產品的改進建議,并利用同步特性初步分析了其對PMU量測可能產生的影響。隨后針對站內同步方式,從精確時間協(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間同步模擬測試平臺,對PTP同步特性開展了研究。反映出1588設備在不同的延時測量機制、不同的時鐘同步模式、交換機引入網(wǎng)絡情況下時間同步精度出現(xiàn)的差異,以及在面向通用對象的變電站事件(Generic Object Oriented Substation Event, GOOSE)報文和采樣值(Sampled Value, SV)報文形成的網(wǎng)絡風暴影響下表現(xiàn)出的同步特性,并分析了其對PMU量測可能產生的影響。同時,針對站間同步方式和站內同步方式可能引起的時間同步偏差,對PMU量測相量產生的影響進行了分析。通過變電站PMU和發(fā)電廠PMU分別展開了討論,重點推導了系統(tǒng)動態(tài)情況下考慮時間同步偏差的變電站PMU量測相量計算公式,分析了時間同步偏差對相量量測的影響規(guī)律；除此之外,利用發(fā)電廠PMU量測轉子角原理,分析了系統(tǒng)處于穩(wěn)態(tài)及動態(tài)情況下發(fā)電廠PMU實測發(fā)電機轉子角與時間同步偏差的關系。同時,搭建了物理實驗平臺,進行了穩(wěn)態(tài)和動態(tài)實驗,驗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.

【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM933.313

【參考文獻】

中國期刊全文數(shù)據(jù)庫 前9條

1 韓禎祥,薛禹勝,邱家駒;2000年國際大電網(wǎng)會議系列報道——電網(wǎng)互聯(lián)的現(xiàn)狀和前景[J];電力系統(tǒng)自動化;2000年24期

2 張景超,張承學,吳方R，

本文編號：1391739