电力系统自动化2025，Vol.49Issue(8)：12-20,9.DOI:10.7500/AEPS20231127003
考虑实际工况的新能源多馈入系统广义运行短路比
Generalized Operational Short-circuit Ratio of Multi-infeed Systems with Renewable Energy Considering Actual Operation Conditions
摘要
Abstract
With the development of renewable energy,the voltage support strength of multi-infeed systems with renewable energy is gradually decreasing,and there is an urgent need for strength evaluation methods.Considering that devices are all at the rated operation condition points,accurate quantification of strength can be achieved by utilizing existing power grid strength indices and threshold.However,the actual operation conditions of devices are diverse and complex,which disrupts the existing criteria for defining indices and causes existing methods to fail.Therefore,this paper focuses on the quantification problem of voltage support strength under actual operation conditions.Based on the perturbation theory of eigen-subspaces,an equivalent single-infeed system that can approximately characterize the stability of the actual system is solved.On this basis,the definition and physical significance of the generalized operational short-circuit ratio are provided,so as to rigorously quantify the strength under actual operation conditions using the generalized operational short-circuit ratio and the critical operational short-circuit ratio for devices.In addition,this paper reveals the specific mechanism of the actual operation conditions on strength with different stable forms.Finally,the effectiveness of the proposed method is verified through cases.关键词
新型电力系统/多馈入系统/电压支撑强度/工况/短路比/电网强度Key words
new power system/multi-infeed system/voltage support strength/operation condition/short-circuit ratio/power grid strength引用本文复制引用
刘晨曦,辛焕海..考虑实际工况的新能源多馈入系统广义运行短路比[J].电力系统自动化,2025,49(8):12-20,9.基金项目
国家重点研发计划资助项目(2023YFB2405900). This work is supported by National Key R&D Program of China(No.2023YFB2405900). （2023YFB2405900）
