南方电网技术2024，Vol.18Issue(7)：74-86,13.DOI:10.13648/j.cnki.issn1674-0629.2024.07.009
省级异步电网频率强度在线评估方法及应用
Online Evaluation Method and Application of Frequency Strength of Provincial Asynchronous Power Grid
摘要
Abstract
The partition asynchronous interconnection of power systems and the replacement of traditional synchronous machines by large-scale new energy sources reduce the frequency strength of the power system and increase the risk of frequency instability.At this time,online evaluation of system frequency strength and monitoring system frequency stability margin are of great significance to the safe and stable operation of the system.Therefore,an online evaluation method of frequency strength suitable for the actual provincial asynchronous power grid is proposed,including three parts:data acquisition and preprocessing,simplification of system frequency modulation model and system frequency strength evaluation.Firstly,based on the operation control system,the operating condition information such as the startup and output of each device in the system is obtained,and the dynamic model library of the frequency regulation of devices in the system is established through the BPA data and data in the wide area measurement system.Secondly,the order of device model is reduced by the unified structural approximation method,then the frequency strength indexes such as frequency drop depth coefficient and slope coefficient are calculated to evaluate the system frequency strength.Finally,the developed frequency strength online evaluation system based on the proposed evaluation method and its application in the actual power grid are introduced.关键词
频率稳定/频率强度/统一结构模型/在线评估/异步电网Key words
frequency stability/frequency strength/unified structural model/online evaluation/asynchronous power grid分类
动力与电气工程引用本文复制引用
吴琛,陈可欣,高晖胜,程旻,谢一工,胡光,辛焕海..省级异步电网频率强度在线评估方法及应用[J].南方电网技术,2024,18(7):74-86,13.基金项目
云南省重大科技专项计划(202002AF080001) （202002AF080001）
云南电网有限责任公司电力规划专题研究项目(云南电网2023-14) （云南电网2023-14）
云南电网有限责任公司科技项目(YNKJXM20201999).Supported by the Major Science and Technology Special Plan of Yunnan Province(202002AF080001) （YNKJXM20201999）
the Electric Power Planning Research Project of Yunnan Power Grid Co.,Ltd.(Yunnan Power Grid 2023-14) （Yunnan Power Grid 2023-14）
the Science and Technology Project of Yunnan Power Grid Co.,Ltd.(YNKJXM20201999). （YNKJXM20201999）
