电力系统保护与控制2026，Vol.54Issue(9)：76-88,13.DOI:10.19783/j.cnki.pspc.251243
考虑电流保护定值不变的分布式电源最大可接入容量评估方法
Maximum hosting capacity evaluation method for distributed generations under fixed overcurrent protection settings
摘要
Abstract
The integration of inverter-interfaced distributed generation(IIDG)alters the fault current characteristics of distribution networks,which can lead to reduced sensitivity and coordination failure of three-stage overcurrent protection under fixed settings.To evaluate the maximum hosting capacity of IIDG without modifying protection settings,a capacity assessment model is formulated incorporating constraints on protection performance,voltage deviation,penetration level,and individual unit capacity.Based on the principles of overcurrent protection coordination,the concept of protection range is introduced as a unified index to characterize both sensitivity and selectivity,and a protection constraint model under fixed settings is derived.To address the need for iterative short-circuit current calculations,an explicit modeling approach for fault currents is proposed and embedded into the optimization framework.By aggregating IIDGs based on protection impact similarity,the original mixed-integer nonlinear problem is converted into a mixed-integer linear programming model through piecewise linearization.MATLAB/Simulink simulations verify that when the IIDG capacity remains within the derived boundary,protection operates correctly and node voltages stay within permissible limits,verifying the effectiveness of the proposed approach.关键词
配电网/电流保护/可接入容量/保护边界/降维求解Key words
distribution network/overcurrent protection/hosting capacity/protection boundary/dimension reduction method引用本文复制引用
谭颖婕,罗国敏,李猛,和敬涵,张衡..考虑电流保护定值不变的分布式电源最大可接入容量评估方法[J].电力系统保护与控制,2026,54(9):76-88,13.基金项目
This work is supported by the National Natural Science Foundation of China(No.52577077). 国家自然科学基金项目资助(52577077) （No.52577077）
