Open AccessActive protection for photovoltaic DC‐boosting integration system during FRT
Author(s) -
Jia Ke,
Chen Jinfeng,
Xuan Zhenwen,
Wang Congbo,
Bi Tianshu
Publication year - 2019
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2019.0540
Subject(s) - boosting (machine learning) , photovoltaic system , overvoltage , converters , computer science , voltage , electric power system , engineering , electronic engineering , power (physics) , electrical engineering , artificial intelligence , physics , quantum mechanics
Compared with traditional photovoltaic (PV) power plants, PV DC‐boosting integration system faces serious DC‐bus overvoltage problem due to its special structure during the fault ride‐through (FRT). Based on the unique power‐output features of PV array, the authors describe a design of coordinated control strategy for the converters in the PV DC‐boosting integration system to maintain a stable DC voltage during FRT process. In addition, existing FRT control scheme ineluctably lowers the performance of the line protection; thus, a combination strategy of the system control and the line protection is proposed to enhance the fault discrimination ability (especially the interphase fault). A detailed model of the PV DC‐boosting integration system is created in PSCAD/EMTDC; the simulation results show that the proposed method not only realises the smooth FRT process with a stable DC bus voltage but also can reliably identify the voltage sag caused by the transmission line faults.