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The invention discloses an intelligent hydraulic vibration reduction electromagnetic energy storage device, which comprises a support module (100 ), a hydraulic vibration reduction module (200), an energy storage module (300) and a control module (400); the
At present, the research on unit vibration mainly focuses on electromagnetic vibration, and there is a lack of systematic review on vibration caused by hydraulic and mechanical
Therefore, the load case of hydraulic disturbance is one of the most important working conditions in transient process simulations of conventional PSP. Unitary moment Unit (rotational) speed 11
Pumped-storage is "the world''s water battery", and it currently accounts for over 94 percent of installed global energy storage capacity. Guo et al. [11] developed the overall transfer matrix to study the hydraulic-mechanical coupling vibration performance of
The propagation of the high-frequency vibration (HFV) could transmit the vibration energy to the upstream headrace tunnel, inducing severe environmental
In accordance with hydraulics and electrical machinery theories, Wu et al. [27] formulated simultaneous differential equations for the coupled hydraulic-mechanical-electric transient process, and established coupled structural models
In this paper, a hydraulic energy recovery system with consideration of storage is designed to harvest energy from human walking motion, based on gait measurement and analysis of walking dynamics. Conversion from mechanical energy induced by foot stepping into hydraulic energy as well as storage under different
. . . I graduated from Tianjin University and obtained my PhD in 2007. After graduation, I became a teacher in Tianjin University and had been undertaking many important research and teaching tasks, especially on engineering hydraulics. I got the associate professor position in 2012. I currently works at the
Based on the energy storage type of hydraulic wind turbines (HWTs) and in view of the unit frequency drop problem under high wind power proportion conditions, this paper proposes a method of primary frequency control under maximum power point tracking (MPPT). HWT power output is affected by wind speed randomness and volatility. In
In the stable operation of the Baishan energy storage power station, the headcover vibrates obviously. To find the cause of vibration, this paper modeled the unit flow area, used the numerical simulation method for steady and unsteady calculation, extracted the pressure fluctuation information in the flow field, and then analyzed the
High‐frequency pressure pulsations are hydraulic phenomena that are frequently observed in pumped storage power stations. These pulsations can propagate
DOI: 10.1002/eer2.32 Corpus ID: 255170421 Forced vibration analysis model for pumped storage power station based on the 1D–3D coupling and pipe walls vibration The effect of sediment on the hydraulics of jet energy dissipation is an urgent issue for high dams
At present, the research on unit vibration mainly focuses on electromagnetic vibration, and there is a lack of systematic review on vibration caused
In the energy storage module, the supercapacitors are used to store electrical energy. The experimental analyses were performed using mechanical testing and sensing machine (MTS) and a maximum
Abstract. Shock and vibration testing of an Active Magnetic Bearing (AMB) supported energy storage flywheel is presented. The flywheel is under development at the University of Texas-Center for Electromechanics (UT-CEM) for application in a transit bus. The flywheel is gimbal mounted to reduce the gyroscopic forces transmitted to the magnetic
1 INTRODUCTION With the rapid development of various kinds of intermittent renewable energies, hydropower stations including pumped-storage power stations are now attracting increasing attention in view of compensating for the power supply fluctuations. 1 Hydropower plays great importance in renewable energy sources as it
DOI: 10.1016/j.seta.2021.101842 Corpus ID: 245156503 Hydraulic coupling vibration characteristics and control of hydropower station with upstream and downstream surge tanks @article{Wu2022HydraulicCV, title={Hydraulic coupling vibration characteristics and
The torsional vibration characteristics of the shaft were analyzed, and simultaneously, the influences of the unbalanced magnetic pull (UMP) [8], fluid seal excitation [9], rotors rub-impact [10], hydraulic unbalance [11], guide bearing loose [12], gyroscopic effect
Abstract. With the rapid development of large-capacity hydraulic turbines and pumped-storage power stations, hydraulic vibration analysis attracts increasing
The system is closed-circuit, so the energy storage takes the form of a symmetric, dual-chamber piston with a spring on the piston rod acting as the energy storage element. A servovalve is used to provide a pulse width modulated pressure according to the required output pressure, and this pressure is filtered by means of an
Pumped-storage hydroelectricity (PSH), or pumped hydroelectric energy storage (PHES), is a type of hydroelectric energy storage used by electric power systems for load balancing. The method stores energy in the form of gravitational potential energy of water, pumped from a lower elevation reservoir to a higher elevation.
Heavy-duty vehicles (HDVs) encounter intense vibrational conditions on rough roads, resulting in ride discomfort and energy dissipation in the suspension system. An inflatable hydraulic-electric regenerative suspension (IHERS), aiming to mitigate the vehicle''s vibration and harvest the dissipated energy, is proposed in this study. The
This study investigates concept of introduction of a hydraulic motor in the nacelle to convert rotor shaft work into hydraulic power that is transmitted to the electric generator at ground/sea level. This combination of hydraulic and electric power generation can help simplify or even eliminate the gearbox, and significantly reduce the head weight
The vibration caused by hydraulic pulsation is the m ain cause of the vibration of the unit and also the vibration caused by the excitation force acting on the runner [ 31 – 33]; its
This results in a decrease in net pressure and a loss of energy, which has a direct impact on the efficiency of energy storage. In this section, we study the efficiency of hydraulic fracture energy storage while considering fracture fluid leak-off. Before conducting the study, we made the following assumptions: 1.
Earthquake Engineering and Resilience (EER) is an international journal covering all areas of earthquake engineering that help prevent natural and man-made disasters. where is the mechanical starting time, is the inertia of rotating fluid and mechanical parts in the turbine and generator, is the rated rotational speed of the unit, is the rated
The paper studies the hydraulic-mechanical coupling vibration (HMCV) performance of pumped storage power station (PSPS) with two turbine units sharing one
4.2.1. Active power control effect with load power step rising. When the power of the hydraulic transmission system is controlled only, the load power of the transmission system load rises from 6670 W step to 7800 W in 30 s and recovers to 6670 W in 60 s. The controller 1 parameters are set to P = 0.3 and I = 0.1.
Hydraulic-mechanical coupling vibration performance of pumped storage power station with two turbine units sharing one tunnel J. Energy Storage, 53 ( 2022 ), Article 105082 View PDF View article View in Scopus Google Scholar
A hydraulic vibration damping and energy storage device technology, which is applied in the direction of shock absorber, spring/shock absorber design features, vibration suppression adjustment, etc., can solve the problem of ineffective use of vibration energy, large energy loss of vibration damping system, and energy storage The system is not
The vibration frequency caused by the uneven flow field of the volute is the number of runner blades multiplied by the rotational speed frequency, or its multiple (two times, three times, four
Hydraulic vibration is a common phenomenon in pumped storage power stations (PSPS) and hydropower plants. Evaluating the performance of the PSPS
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