Development of Pump-Turbine for Seawater Pumped Storage Power Plant

A static frequency converter start-up control strategy for pumped-storage power unit is presented. And rotor position detecting without position sensor is realized according to voltage and magnetism equations of ideal synchronous motor mathematics model. The mechanism and implementation method of initial rotor position determination and rotor position estimation under low frequency without position sensor are expounded and validated by simulations. Based on the mentioned control strategy, first set of a static frequency converter start-up device in China for large-scale pumped-storage unit is developed, which is applied to start-up control test in the 90 MW generator/motor of Panjiakou Pumped-storage Power Plant. Test results show that rotor position detecting, pulse commutation, natural commutation, and unit synchronous procedure control of static start-up are all proved. The outcomes have been applied in running equipment, which proves the feasibility of mentioned method.

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Seawater pumped-storage power plant in Okinawa island, Japan

Engineering Geology ◽

10.1016/0013-7952(93)90012-2 ◽

1993 ◽

Vol 35 (3-4) ◽

pp. 237-246 ◽

Cited By ~ 17

Author(s):

Akitaka Hiratsuka ◽

Takashi Arai ◽

Tsukasa Yoshimura

Keyword(s):

Power Plant ◽

Okinawa Island ◽

Pumped Storage

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Advanced Governor Controller for Pumped-Storage Power Plant and Its Simulation Tool

2006 SICE-ICASE International Joint Conference ◽

10.1109/sice.2006.315208 ◽

2006 ◽

Cited By ~ 1

Author(s):

Kazunori Iwabuchi ◽

Yasuo Takagi ◽

Tadashi Konnai ◽

Yuusuke Nakahara ◽

Kazumasa Kubota ◽

...

Keyword(s):

Power Plant ◽

Simulation Tool ◽

Pumped Storage

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Pressure Analysis in the Draft Tube of a Pump-Turbine under Steady and Transient Conditions

Energies ◽

10.3390/en14164732 ◽

2021 ◽

Vol 14 (16) ◽

pp. 4732

Author(s):

Jing Yang ◽

Yue Lv ◽

Dianhai Liu ◽

Zhengwei Wang

Keyword(s):

Steady State ◽

Pressure Pulsation ◽

Transient Flow ◽

Draft Tube ◽

Simulation Method ◽

Wall Pressure ◽

Pump Turbine ◽

Steady State Condition ◽

Transient Conditions ◽

Pumped Storage

Pumped-storage power stations play a regulatory role in the power grid through frequent transition processes. The pressure pulsation in the draft tube of the pump-turbine under transient processes is important for safe operation, which is more intense than that in the steady-state condition. However, there is no effective method to obtain the exact pressure in the draft tube in the transient flow field. In this paper, the pressure in the draft tube of a pump-turbine under steady-state and transient conditions are studied by means of CFD. The reliability of the simulation method is verified by comparing the real pressure pulsation data with the test results. Due to the distribution of the pressure pulsation in the draft tube being complex and uneven, the location of the pressure monitoring points directly affects the accurate judgement of cavitation. Eight monitoring surfaces were set in the straight cone of the draft tube and nine monitoring points were set on each monitoring surface to analyze the pressure differences on the wall and inside the center of the draft tube. The relationships between the pressure pulsation value inside the center of the draft tube and on the wall are studied. The “critical” wall pressure pulsation value when cavitation occurs is obtained. This study provides references for judging cavitation occurrences by using the wall pressure pulsation value in practical engineering.

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IMPROVEMENT OF FREQUENCY START OF HYDROELECTRIC PUMPED STORAGE POWER PLANT IN THE PUMPING MODE

Electrical Engineering and Power Engineering ◽

10.15588/1607-6761-2015-1-10 ◽

2017 ◽

Vol 0 (1) ◽

Author(s):

V. A. Volkov ◽

D. V. Dovbischuk

Keyword(s):

Power Plant ◽

Pumping Mode ◽

Pumped Storage

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Dimensioning Studies for Reversible Hydro Power Plants in Portuguese Islands

U Porto Journal of Engineering ◽

10.24840/2183-6493_004.001_0007 ◽

2018 ◽

Vol 4 (1) ◽

pp. 77-86

Author(s):

Nuno Fonseca ◽

André Madureira ◽

João Peças Lopes ◽

Manuel Matos

Keyword(s):

Power Plant ◽

Power Systems ◽

Power Plants ◽

Hydro Power ◽

Power Resources ◽

Hydro Power Plants ◽

Pumped Storage ◽

Energetic Level ◽

Energy Surplus ◽

The Ideal

This work is within the scope of set of consultancy studies made for Portuguese islands. It focuses on the integration of Pumped Storage Power in isolated islands. The paper starts to address several power systems circumstances about two Portuguese islands on the energetic level. For each of these islands, an independent examination of the conditions to install a reversible hydro power plant is accomplished. Therefore, the energy volume to be stored due to excess of renewable generation and the ideal power and number of the pumps and turbines to be installed were identified and evaluated for the sake of using the produced energy surplus as to be pumped and later generated. The paper enhances the importance of storing energy in the operation of isolated and small systems with considerable amount of intermittent power resources as well as the conditions for the viability of installing new exploitations of this kind.

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