清远地区10kV架空配电线路防雷策略研究与分析

发布时间：2018-01-20 08:17

本文关键词： 配电线路防雷策略差异化改造　出处：《吉林大学》2017年硕士论文　论文类型：学位论文

【摘要】：雷电是大自然中极具破坏力的一种放电现象,给人类生产生活、特别是电力设施等带来极大的影响。广东省清远市位于北江中下游平原和山区相互交接的地带,由于其特别的地貌,非常容易导致雷电等强对流天气的发生,年平均雷电日数超过90天,雷电活动强烈。10k V架空线路是清远地区配电网的主要组成部分,由于该电压等级电网绝缘水平较低、分布广泛,易遭受雷害,长期以来,导致清远地区10k V配电线路跳闸的首要原因即为雷击。2014年清远地区10k V架空配电线路因雷击引起的故障占10k V中压线路故障总数的30%,雷电已成为造成配电设备运行的主要危害,严重影响设备运行安全性和供电可靠性,也大大增加故障抢修频次与抢修过程中的人身风险。为有效降低10k V架空配电线路雷击故障次数,本文通过对近年来清远系统内配网以往防雷工作经验和成果进行分析与提炼,运用大数据和ATP-EMTP仿真分析技术研究建立了10k V架空线路防雷决策信息系统模型,以系统和仿真计算分析为决策支撑,重点对线路绝缘配置、防雷装置及架空避雷线仿真分析,接地装置优化、避雷器轮换等进行分析研究,形成符合清远地区特点的系统性综合防雷策略。本防雷策略注重对线路绝缘水平进行研究与分析,科学选配防雷装置,因地制宜提出差异化防雷技术要求,实现了10k V架空配电线路绝缘配置更加科学精准,防雷装置配置更加经济合理、地网接地更加简便可靠,充分体现了综合防雷、差异化防雷、精准防雷的思想理念,有效解决了清远地区以往10k V架空配电线路防雷手段单一、盲目、缺乏科学依据等问题。本文还详细介绍了两项防雷改造实际案例,有效验证防雷策略及相关研究成果的实用性和有效性。通过研究与运用防雷策略,可以促进清远地区配网防雷工作的规范化、标准化,提高防雷措施的针对性、有效性,有效减少清远地区10k V配网雷击故障次数,降低雷害引发的相关风险,提升设备健康水平和供电可靠性。
[Abstract]:Lightning is a very destructive discharge phenomenon in nature, which has a great impact on human production and life, especially on power facilities. Qingyuan City of Guangdong Province is located in the middle and lower reaches of the Beijiang River plain and mountain areas intersected. Due to its special geomorphology, it is very easy to cause severe convective weather such as lightning and lightning, with the annual average number of lightning days exceeding 90 days. Strong lightning activity .10kV overhead line is the main component of Qingyuan distribution network, because of the low insulation level of the voltage grade grid, widely distributed, vulnerable to lightning damage, for a long time. Lightning strike is the primary cause of 10kV power distribution line tripping in Qingyuan area. In 2014, 10kV overhead distribution line in Qingyuan area was caused by lightning strike, which accounted for 10k. 30% of the total number of V medium voltage line failures. Lightning has become a major hazard to the operation of distribution equipment, seriously affecting the safety of equipment operation and power supply reliability. It also greatly increases the frequency of emergency repair and personal risk in the process of emergency repair. In order to effectively reduce the 10kV overhead distribution line lightning failure times. This paper analyzes and refines the experience and achievements of lightning protection in Qingyuan distribution network in recent years. Based on the research of big data and ATP-EMTP simulation analysis technology, the decision information system model of 10kV overhead line lightning protection is established, which is supported by system and simulation calculation and analysis. Focus on the line insulation configuration, lightning protection device and overhead lightning protection line simulation analysis, grounding device optimization, lightning arrester rotation and so on. The lightning protection strategy focuses on the research and analysis of the line insulation level, the scientific selection of lightning protection devices, and puts forward the technical requirements of differentiated lightning protection according to the local conditions. The insulation configuration of 10kV overhead distribution line is more scientific and accurate, the lightning protection device is more economical and reasonable, the grounding of ground grid is more simple and reliable, which fully reflects the comprehensive lightning protection and differential lightning protection. The idea of accurate lightning protection effectively solves the problem of single and blind lightning protection for 10kV overhead distribution lines in Qingyuan area. Lack of scientific basis and other issues. This paper also introduces two practical cases of lightning protection transformation, effectively verify the practicality and effectiveness of lightning protection strategy and related research results. Through the research and application of lightning protection strategy. It can promote the standardization and standardization of lightning protection of distribution network in Qingyuan area, improve the pertinence and effectiveness of lightning protection measures, and effectively reduce the lightning failure times of 10kV distribution network in Qingyuan area. Reduce the risk caused by lightning damage, improve equipment health and reliability of power supply.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM863

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