{"title":"利用数值天气预报(NWP)模型评估输电线路等级","authors":"","doi":"10.1016/j.epsr.2024.111032","DOIUrl":null,"url":null,"abstract":"<div><p>The traditional approach for defining the line ampacity ratings of Overhead Lines (OHLs) is static and tends to be conservative. While this approach has been valuable for many years, it may not fully capture the complexities of actual line operating conditions, such as the effect of changing environmental parameters and ambient conditions. This paper proposes a sensorless Line Rating Assessment (LRA) approach to estimate the ampacity of transmission OHL. It employs the IEEE 738 standard and the weather parameters data derived from two distinct numerical weather models, the Weather Research and Forecasting (WRF) model and the Weather Research and Forecasting Chemistry (WRF-Chem) model. The model estimations are compared with weather data collected by weather mast measurements, serving as a reference to validate the numerical weather models. The proposed strategy is applied to a section of 132kV OHL in the Dubai region. Initial investigations include sensitivity analyses to explore the impact of varying weather parameters on the line ampacity ratings. Thereafter, three performance indices are utilised to evaluate the performance of the proposed approach for ampacity estimation. The results indicate that WRF-Chem surpasses WRF by delivering estimates with greater ampacity headroom in winter and ensuring safer ratings in the summer.</p></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":null,"pages":null},"PeriodicalIF":3.3000,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Transmission line rating assessment using numerical weather prediction (NWP) models\",\"authors\":\"\",\"doi\":\"10.1016/j.epsr.2024.111032\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The traditional approach for defining the line ampacity ratings of Overhead Lines (OHLs) is static and tends to be conservative. While this approach has been valuable for many years, it may not fully capture the complexities of actual line operating conditions, such as the effect of changing environmental parameters and ambient conditions. This paper proposes a sensorless Line Rating Assessment (LRA) approach to estimate the ampacity of transmission OHL. It employs the IEEE 738 standard and the weather parameters data derived from two distinct numerical weather models, the Weather Research and Forecasting (WRF) model and the Weather Research and Forecasting Chemistry (WRF-Chem) model. The model estimations are compared with weather data collected by weather mast measurements, serving as a reference to validate the numerical weather models. The proposed strategy is applied to a section of 132kV OHL in the Dubai region. Initial investigations include sensitivity analyses to explore the impact of varying weather parameters on the line ampacity ratings. Thereafter, three performance indices are utilised to evaluate the performance of the proposed approach for ampacity estimation. The results indicate that WRF-Chem surpasses WRF by delivering estimates with greater ampacity headroom in winter and ensuring safer ratings in the summer.</p></div>\",\"PeriodicalId\":50547,\"journal\":{\"name\":\"Electric Power Systems Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.3000,\"publicationDate\":\"2024-09-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electric Power Systems Research\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0378779624009180\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electric Power Systems Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378779624009180","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
Transmission line rating assessment using numerical weather prediction (NWP) models
The traditional approach for defining the line ampacity ratings of Overhead Lines (OHLs) is static and tends to be conservative. While this approach has been valuable for many years, it may not fully capture the complexities of actual line operating conditions, such as the effect of changing environmental parameters and ambient conditions. This paper proposes a sensorless Line Rating Assessment (LRA) approach to estimate the ampacity of transmission OHL. It employs the IEEE 738 standard and the weather parameters data derived from two distinct numerical weather models, the Weather Research and Forecasting (WRF) model and the Weather Research and Forecasting Chemistry (WRF-Chem) model. The model estimations are compared with weather data collected by weather mast measurements, serving as a reference to validate the numerical weather models. The proposed strategy is applied to a section of 132kV OHL in the Dubai region. Initial investigations include sensitivity analyses to explore the impact of varying weather parameters on the line ampacity ratings. Thereafter, three performance indices are utilised to evaluate the performance of the proposed approach for ampacity estimation. The results indicate that WRF-Chem surpasses WRF by delivering estimates with greater ampacity headroom in winter and ensuring safer ratings in the summer.
期刊介绍:
Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview.
• Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation.
• Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design.
• Substation work: equipment design, protection and control systems.
• Distribution techniques, equipment development, and smart grids.
• The utilization area from energy efficiency to distributed load levelling techniques.
• Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.