【摘要】：輸電線路分布范圍廣、處于野外，面臨著各種復(fù)雜的地理環(huán)境和氣候環(huán)境，當(dāng)遇到雷電、暴雨、臺風(fēng)、動植物、飄掛物、吊車等自然及外部環(huán)境因素變化時，會導(dǎo)致輸電線路故障跳閘，直接影響到線路設(shè)備及電網(wǎng)的安全可靠運(yùn)行。為了降低輸電線路跳閘率，運(yùn)維部門必須要準(zhǔn)確識別故障類型，針對不同的故障類型采取不同的措施。目前，國內(nèi)對輸電線路故障類型的辨識研究正處于探索階段，主要集中在雷擊故障辨識的研究，對雷擊與非雷擊故障之間的辨識研究較少，應(yīng)用于實際的成果很少。 本文根據(jù)線路故障原因劃分及研究目的，對輸電線路故障類型進(jìn)行了重新分類定義，將故障類型劃分為雷擊及非雷擊兩大類。并對線路故障行波傳播的衰減進(jìn)行了仿真研究，提出了行波在線監(jiān)測裝置最佳安裝距離。同時，利用ATP-EMPT電磁暫態(tài)仿真軟件平臺，建立典型的JMarti x線路模型，對不同電壓等級輸電線路的雷擊與非雷擊、繞擊與反擊、高阻與金屬性接地等不同類型故障進(jìn)行仿真計算，并深入分析各類故障下電流暫態(tài)仿真波形的不同特性，提出利用故障電流行波波頭、波尾時間及極性脈沖等行波電磁暫態(tài)特性判別雷擊故障與非雷擊故故障、雷電繞擊與反擊、高阻與金屬性接地故障故障類型的依據(jù)。還對感應(yīng)雷與直擊雷的電磁暫態(tài)特性進(jìn)行了簡單的分析，提出其辨識方法。最后根據(jù)分布式輸電線路行波定位裝置及故障錄波系統(tǒng)及多年積累的故障行波數(shù)據(jù)，依據(jù)本文提出的故障類型辨識依據(jù)對典型的故障跳閘進(jìn)行判別，結(jié)合比對運(yùn)維單位的現(xiàn)場查找結(jié)果，結(jié)果表明，本文提出的辨識依據(jù)能滿足輸電線路典型故障跳閘的辨識要求，，并都具有較高的準(zhǔn)確率。
[Abstract]:Transmission lines are widely distributed in the wild and face various complicated geographical and climatic environments. When the natural and external environmental factors such as lightning, torrential rain, typhoons, animals and plants, suspended objects, cranes and other natural and external environmental factors change, The fault tripping of transmission line will directly affect the safe and reliable operation of line equipment and power grid. In order to reduce the tripping rate of transmission lines, the operation and maintenance departments must accurately identify the fault types and take different measures for different fault types. At present, the domestic research on fault type identification of transmission lines is in the exploratory stage, mainly focused on the research of lightning fault identification, less research on the identification between lightning strike and non-lightning strike fault, and few achievements in practical application. In this paper, the fault types of transmission lines are reclassified and defined according to the cause division and research purpose of transmission lines, and the fault types are divided into two categories: lightning strike and non-lightning strike. The attenuation of traveling wave propagation of line fault is simulated, and the optimal installation distance of traveling wave on-line monitoring device is put forward. At the same time, using the ATP-EMPT electromagnetic transient simulation software platform, the typical JMarti x line model is established, and the lightning stroke and non-lightning strike of transmission lines with different voltage levels are analyzed. Different types of faults such as high resistance and gold attribute grounding are simulated and calculated, and the different characteristics of current transient simulation waveforms under various kinds of faults are analyzed, and the use of fault electric popular wave head is put forward. The basis for distinguishing the fault types of lightning strike and non-lightning strike, lightning wound strike and counterattack, high resistance and gold attribute grounding fault is the electromagnetic transient characteristics of traveling wave such as wave tail time and polarity pulse. The electromagnetic transient characteristics of inductive lightning and direct-strike lightning are analyzed and the identification method is proposed. Finally, according to the distributed traveling wave location device, fault recording system and accumulated fault traveling wave data for many years, the typical fault tripping is identified according to the fault type identification proposed in this paper. Combined with the field search results of the operation and maintenance units, the results show that the identification basis proposed in this paper can meet the identification requirements of typical fault tripping of transmission lines, and all of them have high accuracy.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM75

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本文編號：2381991