Abstract
This paper addresses a mathematical model and dynamic analysis of multi-unit hydropower systems in transient process. In this work, the first unit is assumed to be subject to a sudden load decrease, while the second unit runs with load. An approach to the description of the six stochastic dynamic transfer coefficients of the hydro-turbine is proposed for the second unit. Moreover, a novel dynamic model for the multi-unit hydropower system, able to take into account the eventual occurrence of water hammer in the penstock and the nonlinearity of the generator, is introduced. Also, a numerical application is analyzed in order to investigate the effectiveness of the approach proposed and the dynamic characteristics of the system under study. Finally, a comparative analysis is proposed in order to validate the proposed system. The methods and results implemented in this work provide theoretical tools to guarantee the stable operation of hydropower stations.
| Original language | English |
|---|---|
| Pages (from-to) | 535-548 |
| Number of pages | 14 |
| Journal | Nonlinear Dynamics |
| Volume | 90 |
| Issue number | 1 |
| Early online date | 21 Jul 2017 |
| DOIs | |
| Publication status | Published - 31 Oct 2017 |
Keywords
- multi-unit hydropower systems
- stochastic transfer coefficients
- transient process
- dynamics
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