【摘要】：隨著我國電氣化高速鐵路的不斷發(fā)展,高速鐵路與電力系統(tǒng)的聯(lián)系也越來越密不可分,鐵路電力貫通線為鐵路沿線信號、通信及其他鐵路綜合用電設備提供電能,其電壓是否正常對高速鐵路的安全運行具有重要意義。由于電纜具有受環(huán)境影響小、不占地面空間、不暴露目標、安全性好、可靠性高等一系列的優(yōu)點,其在鐵路電力貫通線中的比例不斷上升。我國的高速鐵路,普遍采用了1OkV全電纜電力貫通線的模式。 電纜的分布電容較大,在系統(tǒng)正常或故障時會有較大的電容電流流過,這又給全電纜貫通線路帶來了一系列必須解決的問題。電纜的容性電流大,電容效應會使線路末端電壓升高,導致電壓分布不合理,甚至超出允許范圍。過大的容性電流使系統(tǒng)容性無功過剩,進線功率因數(shù)較低達不到要求。中性點不接地方式下會使電弧不能自熄。本文通過理論分析電纜的運行情況,結合電纜在實際工程中的應用,研究了全電纜電力貫通線的調壓技術,使電壓達到供電標準。 本文探討了鐵路10kV電力貫通線中電纜的應用情況,討論了電纜的集中參數(shù)模型和分布參數(shù)模型并從兩種模型的角度分別說明了其電壓升高的原因。依據(jù)調壓原理研究了全電纜貫通線的調壓技術,驗證了通過有載調壓器與無功補償相配合的調壓策略的有效性,無功補償宜采用配電所集中補償和沿線設置并聯(lián)電抗器分散補償相結合的補償方式。75%的補償度不適用于大長電纜,補償度應隨著電纜的增長相應的增大。介紹了并聯(lián)電抗器、SVC、SVG的補償原理。 津秦客運專線是設計時速高達350km標準客運專線,其電力貫通線采用全電纜模式。本文針對津秦客專濱海北配電所至唐山變配電所供電區(qū)段的電力貫通線進行了PSCAD/EMTDC軟件仿真和現(xiàn)場實測。通過在不同負載率下對各種調壓方式效果的仿真,確立了最佳的調壓方案。在工程現(xiàn)場條件允許的情況下,進行了多種調壓方式的測試,驗證了調壓技術的正確性。
[Abstract]:With the continuous development of electrified high-speed railway in China, the connection between high-speed railway and power system is becoming more and more inseparable. Railway power through line provides electric energy for railway signal, communication and other railway comprehensive electric equipment. Whether the voltage is normal or not is of great significance to the safe operation of high-speed railway. A series of advantages, such as small environmental impact, not occupying ground space, not exposing targets, good safety and high reliability, are rising in the proportion of railway power transmission line.
The distributed capacitance of the cable is large, and when the system is normal or faulty, there will be large capacitive current flowing through the cable, which brings a series of problems that must be solved. The current makes the system capacitive reactive power excess and the power factor of the feeder is lower than the requirement.The arc can not extinguish itself if the neutral point is not grounded.This paper analyzes the operation of the cable theoretically and studies the voltage regulation technology of the power through line of the whole cable in combination with the application of the cable in the actual project to make the voltage reach the power supply standard.
This paper discusses the application of cables in railway 10kV power through-line, discusses the lumped parameter model and distributed parameter model of cables, and explains the reasons for their voltage rise respectively from the two models. Based on the voltage regulation principle, the voltage regulation technology of all-cable through-line is studied, and the phase between on-load voltage regulator and reactive power compensation is verified. For the validity of the voltage regulation strategy, the reactive power compensation should be combined with the centralized compensation of the distribution station and the distributed compensation of shunt reactors along the line. 75% of the compensation degree is not suitable for long cables. The compensation degree should increase with the increase of the cables. The compensation principle of shunt reactors, SVC and SVG is introduced.
The Tianjin-Qinhuangdao passenger dedicated line is designed as a standard passenger dedicated line with a speed of 350 km/h and its power through line adopts the whole cable mode.The PSCAD/EMTDC software simulation and field measurement of the power through line from Binhai North Distribution Station of Tianjin-Qinhuangdao passenger dedicated to the power supply section of Tangshan Transformer and Distribution Station are carried out in this paper. The simulation results show that the optimal voltage regulation scheme is established. Under the allowable conditions of the project site, a variety of voltage regulation methods are tested to verify the correctness of the voltage regulation technology.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U223;TM247

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