基于GIS系统的广东省台风灾害对电力系统损毁预警方法研究毕业论文
2021-03-23 22:19:17
摘 要
近年来伴随着全球暖化,极端天气事件频繁发生,台风作为极端天气的一种,其发生的频率和强度不断上升。台风有巨大的破坏力,台风期间,电力系统倒杆、断线、跳闸,造成电力系统大范围长时间停电,电力系统修复时间较长,使得人民的正常生活受到严重影响。为了提高电力系统稳定性,提高其防御台风的能力,相应的台风预警措施必不可少。
本文在阅读了大量相关参考文献的基础上,充分分析广东省台风的基本分布情况及其台风的强度等特征信息,掌握广东省台风灾害的特点;同时考虑电力系统输电线路和杆塔的基本信息和所在地的地理特征。综合分析上述各种信息,本文提出一种基于GIS系统的广东省台风灾害对电力系统损毁预警方法,该方法基本思路为比较输电线路设计风速和台风预测风速,但在比较过程中先将两个风速进行修正处理。其中考虑输电线路的实际运行情况、输电设备基础信息等对输电线路设计风速进行修正;考虑输电线路所处位置的地形特点对台风预测风速进行修正。进而根据比较结果对预警结果进行分级处理,以供相关部门使用。
本文在第四章中给出了相应的实例分析,文中选取途径广东省编号为1604的台风“妮妲(Nida)”,同时选取广东某区的一输电线路及杆塔,对该输电线路在台风Nida行进过程中的损毁预警结果进行分析,通过计算得出每间隔6小时的台风灾害预警等级。该预警措施能够在一定程度上帮助相关部门提前采取有效预防措施,有助于合理分配调度人力资源和物质资源,降低台风灾害下电力系统的经济损失。
关键词:台风灾害、电力系统、预警方法、影响因子
Abstract
In recent years, along with global warming, extreme weather events occur frequently and the typhoon is a kind of extreme weather, the occurrence frequency and intensity is increasing.The typhoon has a huge destructive power, during the typhoon, the power system was broken, rod, tripping, causing power system with large scale and long time power system blackout.However,the repair time is longer, which seriously affected the normal life of the people.In order to improve the stability of the power system and improve its ability to defend against typhoons, the corresponding typhoon warning measures are essential.
On the basis of reading a large number of relevant reference documents, this paper fully analyzes the basic distribution of typhoon in Guangdong province and the characteristics of typhoon intensity, and grasps the characteristics of typhoon disaster in Guangdong Province;at the same time, the basic information of transmission lines and towers and the geographical features of their location are considered.A comprehensive analysis of the above information, this paper presents a GIS based system for typhoon damage to power system damage warning in Guangdong province,the basic idea of this method is to compare the design wind speed and the typhoon forecast wind speed, but in the comparison process, two wind speeds are corrected first.Considering the actual operation of transmission lines and the basic information of transmission equipment, the design wind speed of transmission lines is modified;considering the topographic features of the transmission line, the prediction wind speed is modified.Then, according to the comparison results, the early warning results are classified for the use of relevant departments.
In the fourth chapter this paper gives corresponding example analysis, this paper selects the number of ways 1604 typhoon Nida in Guangdong Province;at the same time, a transmission line and a tower in a certain area of Guangdong are selected to analyze the damage warning results of the transmission line during the typhoon Nida.Through calculation, the warning rank of typhoon disaster per 6 hours is obtained.The precautionary measures can help the relevant departments to take effective preventive measures in advance to a certain extent, the reasonable allocation of human resources and material resources, reduce the power system under the economic losses of typhoon disasters.
Key words :typhoon disaster;power system;early-warning method;impact fact