新型电力系统的惯量分析方法  

Inertia Analysis Method of New Power System

作　　者：郭洪芹 肖友强 万航羽 吴政声 李俊杰 王文飞 Guo Hongqin;Xiao Youqiang;Wan Hangyu;Wu Zhengsheng;Li Junjie;Wang Wenfei(China Energy Construction Group Yunnan Electric Power Design Institute Co.,Ltd.,Kunming 650051,China)

机构地区：[1]中国能源建设集团云南省电力设计院有限公司,云南昆明650051

出　　处：《云南电力技术》2023年第4期54-59,共6页Yunnan Electric Power

基　　金：中国能源建设集团有限公司 科技项目:碳中和背景下省级储能规划技术研究(DG2-X01-2022)。

摘　　要：新型电力系统的惯量由电源侧和负荷侧构成,随着新能源占比不断提高,电源侧惯量逐步下降,给新型电力系统安全稳定运行带来挑战。本文详细分析了电源侧的水轮机组、汽轮机组、风力机组、光伏系统、同步调相机、电源侧和负荷侧的惯量计算方法;创新提出了负荷侧等效惯量计算步骤和处理方法;推导了汽轮发电机组轴系惯量、新型电力系统等效惯量的计算公式;总结了国内外电力系统的惯量评估指标;阐述了一次调频不改变系统惯量,只是抵消部分不平衡功率。算例表明,本文提出的惯量分析方法简单实用,为新型电力系统惯量分析提供借鉴和指导。The inertia of the new power system is composed of the power side and the load side.With the continuous increase of the proportion of new energy,the inertia of the power side gradually decreases,which brings challenges to the safe and stable operation of the new power system.This paper analyzes in detail the calculation method of inertia of the power supply side water turbine unit,steam turbine unit,wind turbine unit,photovoltaic system,synchronous adjusting camera,power supply side and load side.The calculation procedure and processing method of load side equivalent inertia are innovatively proposed.The formulas for calculating the inertia of shafting of turbo-generator set and equivalent inertia of new power system are derived.The inertia evaluation indexes of power systems at home and abroad are summarized.It is explained that one frequency modulation does not change the inertia of the system,but only cancells part of the unbalanced power.An example shows that the inertia analysis method proposed in this paper is simple and practical,and provides reference and guidance for the inertia analysis of new power systems.

关 键 词：新型电力系统 惯量 转动惯量 惯性时间常数 一次调频 新能源占比 

分 类 号：TM74[电气工程—电力系统及自动化]