浙江电力2024，Vol.43Issue(2)：1-12,12.DOI:10.19585/j.zjdl.202402001
新型电力系统惯量特性及其实时感知技术
Inertia characteristics and the real-time sensing technology of new-type power systems
摘要
Abstract
Integration of new energy sources will continuously encroach upon the startup capacity of conventional units,reducing system's rotational inertia and frequency regulation capabilities.This leads to accelerated frequency changes and increased fluctuation amplitudes.Therefore,it is imperative for new energy units to provide active iner-tia support.However,the dynamic characteristics of new energy units differ significantly from synchronous genera-tors,making traditional swing equations inadequate to fully reflect the dynamic process of frequency response in new-type power systems after disturbances.Therefore,an inertia model for new-type power systems is established to accurately characterize the inertia response process of synchronous generators,grid-following inverters,and grid-forming inverters.A real-time inertia measurement method is proposed,which employs an improved polynomial curve fitting method(PCFM)and system identification method to accurately identify the system's rotational inertia and regional inertia.Finally,through simulation,a quantitative assessment of the equivalent inertia of new-type power systems is conducted,and the effectiveness of the proposed measurement method and mathematical model is validated.关键词
电力系统惯量/频率响应/虚拟惯量/惯量估计/阶跃响应Key words
inertia of power system/frequency response/virtual inertia/inertia estimation/step response引用本文复制引用
马骏超,陆承宇,王晨旭,冯启帆,夏杨红,彭琰..新型电力系统惯量特性及其实时感知技术[J].浙江电力,2024,43(2):1-12,12.基金项目
国家自然科学基金项目(52007162) （52007162）
国网浙江省电力有限公司科技项目(5211DS220008) （5211DS220008）
