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

Zhang, Lei; Zhang, Jian; Yu, Xiaodong; Lv, Jiawen; Zhang, Xiaoxin

doi:10.3390/en12132498

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…Considering the high cost and long test cycle of the pressure pulsation experiment [19][20][21], it is convenient to study the pressure pulsation characteristics of the pump by using numerical simulation [22][23][24][25]. However, some existing studies on the two-way pump [26] show that the numerical simulation method is not a particularly reliable means to study the hydrodynamic characteristics of the two-way pump because the vortex, reflux, and other unstable flow phenomena in the two-way pump are obvious under reverse operation.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Internal Pressure Pulsation Characteristics of a Bidirectional Axial Flow Pump Operating in Forward and Reverse Directions

et al. 2022

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A bidirectional axial flow pump can realize bidirectional pumping, which has a wide application prospect in coastal low-head pumping stations and water jet propulsion systems. In this paper, a typical bidirectional axial flow pump is taken as the research object, and the hydraulic model of the bidirectional axial flow pump is manufactured. The hydrodynamic characteristics of the bidirectional axial flow pump are tested on the high-precision hydraulic mechanical test bench, including the positive and negative directions. In the experiment, multiple pressure pulsation monitoring points were arranged in the impeller chamber, and the pressure fluctuations in the pump under a total of 42 flow conditions were measured by a micro pressure pulsation sensor, involving 21 working conditions of forward operation and 21 working conditions of reverse operation. According to the experimental results, the hydrodynamic characteristics, especially the pressure pulsation characteristics in the pump, of the two-way axial flow pump under positive and negative operation are comprehensively compared and analyzed, and the energy characteristics and the propagation law of pressure pulsation of the two-way axial flow pump under positive and negative operation are revealed. The research results provide an important reference for the safe and stable operation of coastal bidirectional axial flow pump stations.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Internal Pressure Pulsation Characteristics of a Bidirectional Axial Flow Pump Operating in Forward and Reverse Directions

et al. 2022

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“…Since the kinetic energy of the fluid is reduced and converted into pressure energy, the pressure in the tube gradually increases along the upstream direction. That is, a pressure wave propagates upstream at a wave velocity a [8,9]. Figure 1 shows the movement of the liquid in a horizontal pipeline after the valve is suddenly closed at the end of a pipeline, ignoring the friction and local loss.…”

Section: Introductionmentioning

confidence: 99%

Establishment and Solution of Four Variable Water Hammer Mathematical Model for Conveying Pipe

Duan

Jin³

2022

Energies

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Transient flow in pipe is a much debated topic in the field of hydrodynamics. The water hammer effect caused by instantaneous valve closing is an important branch of transient flow. At present, the fluid density is regarded as a constant in the study of the water hammer effect in pipe. When there is gas in the pipe, the variation range of density is large, and the pressure-wave velocity should also change continuously along the pipe. This study considers the interaction between pipeline fluid motion and water hammer wave propagation based on the essence of water hammer, with the pressure, velocity, density and overflow area set as variables. A new set of water hammer calculation equations was deduced and solved numerically. The effects of different valve closing time, flow rate and gas content on pressure distribution and the water hammer effect were studied. It was found that with the increase in valve closing time, the maximum fluctuating pressure at the pipe end decreased, and the time of peak value also lagged behind. When the valve closing time increased from 5 s to 25 s, the difference in water hammer pressure was 0.72 MPa, and the difference in velocity fluctuation amplitude was 0.076 m/s. The findings confirm: the greater the flow, the greater the pressure change at the pipe end; the faster the speed change, the more obvious the water hammer effect. High-volume flows were greatly disturbed by instantaneous obstacles such as valve closing. With the increase of time, the pressure fluctuation gradually attenuated along the pipe length. The place with the greatest water hammer effect was near the valve. Under the coupling effect of time and tube length, the shorter the time and the shorter the tube length, the more obvious the pressure fluctuation. Findings also confirm: the larger the gas content, the smaller the fluctuation peak of pipe end pressure; the longer the water hammer cycle, the smaller the pressure-wave velocity. The actual pressure fluctuation value was obviously lower than that without gas, and the size of the pressure wave mainly depended on the gas content. When the gas content increased from 1% to 9%, the difference of water hammer pressure was 0.41 MPa.

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“…The main idea is storage surplus generated electricity when off-peak, to usage energy in peak time, in which the demands are more than total capacity (Zhang, 2019). The efficiency of the power plants at has between 70 and 85% (Hunt, 2014) and the balancing production and consumption of electricity, alignment energy, providing lateral services, efficient performance another unit, sustainable environmental and economical have been the benefits of plants.…”

Section: Introductionmentioning

confidence: 99%

An integrated mathematical model of dynamic production and maintenance planning in pumped-storage hydroelectricity

Asgari

Jolai

Movahedisobhani

2021

JM2

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Purpose Pumped-storage hydroelectricity (PSH) is considered as an effective method to moderate the difference in demand and supply of electricity. This study aims to understanding of the high capacity of energy production, storage and permanent exploitation has been the prominent feature of pumped-storage hydroelectricity. Design/methodology/approach In this paper, the optimization of energy production and maintenance costs in one of the large Iranian PSH has been discussed. Hence, a mathematical model mixed integer nonlinear programming developed in this area. Minimizing the difference in supply and demand in the energy production network to multiple energies has been exploited to optimal attainment scheme. To evaluate the model, exact solution CPLEX and to solve the proposed programming model, the efficient metaheuristics are utilized by the tuned parameters achieved from the Taguchi approach. Further analysis of the parameters of the problem is conducted to verify the model behavior in various test problems. Findings The results of this paper have shown that the meta-heuristic algorithm has been done in a suitable time, despite the approximation of the optimal answer, and the consequences of research indicate that the model proposed in the studied power plant is applicable. Originality/value In pumped-storage hydroelectricity plants, one of the main challenges in energy production issues is the development of production, maintenance and repair scheduling concepts that improves plant efficiency. To evaluate the mathematical model presented, exact solution CPLEX and to solve the proposed bi-objective mixed-integer linear programming model, set of efficient metaheuristics are used. Therefore, according to the level of optimization performed in the case study, it has caused the improvement of planning by 7%–12% and effective optimization processes.

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

Cited by 7 publications

References 17 publications

Experimental Study on the Internal Pressure Pulsation Characteristics of a Bidirectional Axial Flow Pump Operating in Forward and Reverse Directions

Experimental Study on the Internal Pressure Pulsation Characteristics of a Bidirectional Axial Flow Pump Operating in Forward and Reverse Directions

Establishment and Solution of Four Variable Water Hammer Mathematical Model for Conveying Pipe

An integrated mathematical model of dynamic production and maintenance planning in pumped-storage hydroelectricity

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