电力系统保护与控制2024，Vol.52Issue(22)：176-187,12.DOI:10.19783/j.cnki.pspc.240053
基于不对称低压穿越的逆变型电源的故障计算模型
Fault calculation model of inverter power supply based on asymmetric low-voltage ride through
摘要
Abstract
The distribution characteristics of new energy make it easy for near power failures to occur in new power systems,leading to it being difficult to ignore the impact of three-phase asymmetry on inverter power supply.The traditional positive sequence model for inverter power supply can only symmetrically output reactive power compensation.It cannot accurately calculate the near power asymmetric faults.First,this paper points out the problems of the existing low-voltage ride through specifications when three-phase asymmetry occurs.It improves them,and designs a set of asymmetric low-voltage ride through specifications using phase voltage indicators.Then,a universal fault calculation model for the inverter power supply is established,and its equivalent methods when connected to high current and low current grounding systems are analyzed respectively.The effectiveness of the model is verified through simulation of the single power supply system.Finally,the phase component fault calculation method for the new power system is proposed,and the substitution calculation methods for various fault types and inverter power supply model are derived.The correctness of the proposed algorithm is verified through numerical examples.关键词
逆变型电源/不对称低压穿越/故障计算模型/新型电力系统/相分量法Key words
inverter power supply/asymmetric low-voltage ride through/fault calculation model/new power system/phase component method引用本文复制引用
汤先航,莫仕勋,刘斌,刘庆浩,莫钰滢..基于不对称低压穿越的逆变型电源的故障计算模型[J].电力系统保护与控制,2024,52(22):176-187,12.基金项目
This work is supported by the National Natural Science Foundation of China(No.52377172). 国家自然科学基金项目资助(52377172) （No.52377172）
