Transient Simulation for a Pumped Storage Power Plant Considering Pressure Pulsation Based on Field Test

Lei Zhang, Jian Zhang, Xiaodong Yu, Jiawen Lv and Xiaoying Zhang
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Lei Zhang: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
Jian Zhang: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
Xiaodong Yu: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
Jiawen Lv: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
Xiaoying Zhang: College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China

Energies, 2019, vol. 12, issue 13, 1-16

Abstract: In this study, fast Fourier transform and inverse transform are adopted for noise reduction filtering the data of load rejection pressure of a single unit in a one-tube, four-unit pumped storage power station. Five-spot triple smoothing method is used to extract the time-average and pulsation value of the water hammer pressure of the spiral case and draft tube inlet. The reasonable correction formula is put forward, and the pulsating pressure rise rate of the spiral case (4.44%) and the draft tube inlet (−1.22%) are obtained. A mathematical model is also established for the transition process of the water conveyance and power generation system of the pumped storage power station, and the field single-unit load rejection condition is simulated. The simulation results are consistent with the measurements, and the accuracy of the calculation model in predicting the time-average pressure of water hammer is verified. Thus, the extreme successive load rejection conditions can be simulated based on the proposed model. Combining with the pulsating pressure rise rate of unit, the actual extreme value of extreme working condition is reasonably calculated. The conclusion shows that the pressure of spiral case and draft tube inlet after considering pressure pulsation can meet the control requirements, avoid the damage caused by extreme working condition test to unit, and ensure the operation safety of unit.

Keywords: pumped storage power station; load rejection test; numerical simulation; control condition; pressure fluctuation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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