Open AccessSystem start‐up of DC PV power collection network: scenario‐driven coordination strategies and implementation
Author(s) -
Hu Hao,
Zhu Miao,
Li Xiuyi,
Cai Xu
Publication year - 2020
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
eISSN - 1752-1424
pISSN - 1752-1416
DOI - 10.1049/iet-rpg.2020.0431
Subject(s) - converters , photovoltaic system , voltage droop , computer science , correctness , asynchronous communication , maximum power point tracking , power (physics) , electronic engineering , voltage , control engineering , engineering , electrical engineering , voltage source , telecommunications , inverter , physics , quantum mechanics , programming language
Based on the two‐stage‐type configuration of direct current (DC) photovoltaic (PV) power collection network, the key issues of coordination start‐up and operation mode switching for the converters in different stages are investigated thoroughly in this study. With the assistance of start‐up resistors on low‐voltage DC (LVDC) side, the asynchronous start‐up, master–slave synchronous start‐up and droop synchronous start‐up for the first‐stage maximum power point tracking (MPPT) converters are proposed along with the corresponding inter‐stage coordination scheme. Besides, two start‐up strategies for the second‐stage DC step‐up converter are proposed with the considerations of different scenarios. According to the proposed scenario‐driven coordination strategies, the start‐up of DC collection network could be realised without relying on real‐time communication. The principles, logical flow and parameter design methods of the proposed scenario‐driven coordination start‐up strategies are explained in details while a comparative study is performed. The correctness and effectiveness of the proposed strategies have been verified by the system simulation. The work of this study could be beneficial for the future engineering applications of DC PV generation and integration.