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Conference Paper
Power Conditioning System with Seamless Mode Transition for Microgrid Island Operations
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- Authors
- Sewan Heo, Jinsoo Han, Wan-Ki Park
- Issue Date
- 2018-04
- Citation
- International Systems Conference (SysCon) 2018, pp.706-711
- Language
- English
- Type
- Conference Paper
- Abstract
- This paper proposes a design of power conditioning system (PCS) and microgrid island operations which is based on the PCS. The microgrid can be islanded from a utility grid and can be connected to the grid seamlessly after phase detection and synchronization to the grid through a phase-locked loop and a slew-rate controlled synchronizer, respectively. There are three microgrid operations based on the PCS. The microgrid detects a grid failure and switches fast to an island in the protection mode. On the other hand, it changes the operation mode smoothly through a stabilization period in the auto-island mode. The microgrid can also be an island through matching the supply and load during connection to the grid in the zero-energy mode. The function and performance of the PCS were verified though simulations with the PSIM tool. The PCS detected the grid failure and islanded successfully within 1 ms. Moreover, there was no influence on the load through the seamless mode transition.
- KSP Keywords
- Grid failure, Operation mode, Phase Detection, Protection mode, Slew Rate, Utility Grid, Zero-energy mode, island mode, microgrid operations, mode transition, phase-locked loop(PLL)