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The Research on Over-Voltage and Restrain Strategy for UHV Transmission Line

Author: ZhaoYongSheng
Tutor: WangFuRong
School: Southwest Jiaotong University
Course: High Voltage and Insulation Technology
Keywords: UHV Transmission line Power frequency overvoltage Over-voltage PSCAD / EMTDC
CLC: TM862
Type: Master's thesis
Year: 2009
Downloads: 391
Quote: 3
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Abstract


Power system over-voltage 1000kV ultra-high voltage ( UHV Ultra high voltage ) power grid must be an important research topic , it not only affects the design of transformers, circuit breakers , power lines and other electrical equipment insulation strength , but also directly related to the power system would survive run stably . The transmission line parameters, and system capacity features make the over-voltage is more serious than the average EHV lines . Therefore , over-voltage is the key issue of the UHV transmission technology , the decisive factor in the UHV transmission line design . UHV transmission line insulator can withstand over - voltage margin , the occurrence of over-voltage resulting in insulators breakdown must replace the the insulator caused economic losses to the electric power system is huge , and therefore must be considered in the early construction of UHV how to limit the over-voltage . Firstly , a detailed theoretical analysis of the southeastern Shanxi - Nanyang - Jingmen transmission line power frequency over-voltage and over-voltage generation mechanism and influencing factors are given the Jinnan Jing line system model and calculate the system parameters and to explore the over-voltage limit targets ; depth study and over-voltage limit restrictions . Then, using electromagnetic transient simulation program PSCAD / EMTDC was simulated on of Jinnan Jing line power frequency temporary over-voltage and transient over - voltage , high voltage shunt reactor to limit frequency overvoltage and the use of metal oxide property arresters, circuit breakers parallel resistance limit operating voltage measures on this basis, summed up the general rules of UHV transmission lines internal over-voltage limit frequency over- voltage and over- power suppression strategy .

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CLC: > Industrial Technology > Electrotechnical > High Voltage Engineering > Overvoltage and Its Protection > Over-voltage protection devices
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