| Autor: |
Bo Long, Ben Shujun, Zhou Shilian, Li Longfang, Chen Yong |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
2021 Power System and Green Energy Conference (PSGEC). |
| DOI: |
10.1109/psgec51302.2021.9541817 |
| Popis: |
The action of various electric vehicles’ disordered discharging will bring great interference to the stability of grid and the daily load forecasting and power scheduling will suffer adverse impact. In V2G mode, the LCL-type grid-connected power converter serving as the rectifier and inverter is commonly used. Voltage source grid-connected inverters (GCIs) with LCL-filter have been extensively applied by the V2G control. However, it is a high-order system that has serious resonance issues at the resonance frequency. The complex impedance network of the charging piles causes parallel and series resonance problems between inverters and the utility grid, making the resonance problems more complicated, sometimes the oscillation even pushes the grid system to enter the unstable state, which restricts the large-scale application of EVs. This paper proposed an adaptive virtual impedance reshaping method (AVIRM) to solve the harmonic resonance problems in the multi-parallel inverter system (MIS) by implementing the on-line grid impedance detection. Parameters of Quasi-Proportional-Resonance (QPR) controller and AVIRM control loop are changed in real time, which ensures the stability of the system with the grid impedance variations. The proposed method improves parameter regulation efficiency in VIRM. Finally, results validate its effectiveness. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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