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- Title
计及负序控制策略的光伏逆变器故障特性分析.
- Authors
徐晓春; 黄 涛; 谢 华; 赵青春
- Abstract
In case of an asymmetrical fault in PV accessed system, the inverter will simultaneously control the outputs of positive and negative sequence currents. However, there are few studies on inverter fault characteristics considering negative sequence control strategy. Therefore, the solution method for the steady-state short-circuit current of the inverter is firstly derived. Then the short-circuit current characteristics and equivalent negative-sequence impedance characteristics of the inverter output under asymmetrical faults are investigated by considering different negative sequence control strategies. The similarity and difference in the fault characteristics of photovoltaic power generation under different control strategies and different fault types are demonstrated. Finally, a simulation model is built to verify the theoretical analysis results. The results show that the influence of negative sequence control strategy should be fully considered in the study of fault characteristics and protection principle with the integration of new energies.
- Subjects
SHORT-circuit currents; PHOTOVOLTAIC power systems; PHOTOVOLTAIC power generation; SIMULATION methods &; models
- Publication
Zhejiang Electric Power, 2023, Vol 42, Issue 10, p1
- ISSN
1007-1881
- Publication type
Article
- DOI
10.19585/j.zjdl.202310001