Abstract
The conventional PV systems based on the voltage inverters only inject dispatched power to the utility grid when they work at a grid-connected mode in the hydro-PV hybrid microgrid. Due to the droop method employed for load sharing between generators, as well as the enormous inertia of system. The existence of frequency steady-state error and the slow active power/frequency dynamic response are inevitable. Therefore, a novel frequency restoring strategy for the hydro-PV hybrid microgrid based on the improved hierarchical control of PV systems is proposed in this paper. The output active power of PV systems is controlled by an extra frequency restoring controller resided in the tertiary control level. The frequency steady-state error is eliminated through regulating and rebalancing the power flow between the hydropower and the PV system. The proposed strategy has verified through simulations and experiments.
Original language | English |
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Title of host publication | Proceedings of the IEEE International Power Electronics and Application Conference and Exposition (IEEE PEAC'14) |
Number of pages | 6 |
Publisher | IEEE Press |
Publication date | Nov 2014 |
Pages | 348 - 353 |
ISBN (Print) | 978-1-4799-6768-1 |
DOIs | |
Publication status | Published - Nov 2014 |
Event | IEEE International Power Electronics and Application Conference and Exposition 2014 - Shanghai, China Duration: 5 Nov 2014 → 8 Nov 2014 |
Conference
Conference | IEEE International Power Electronics and Application Conference and Exposition 2014 |
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Country/Territory | China |
City | Shanghai |
Period | 05/11/2014 → 08/11/2014 |
Keywords
- Hybrid microgrid
- Hydropower
- PV
- Frequency restoring
- Hierarchical control