Determining the operating performance through electrical measurements of a hydro generator

At present, the energy consumption of the pumping unit represents the highest cost in operating a pumping system. Due to this reason, this paper proposes a reliable and robust solution for integrating a wind energy conversion system (WECS) into an already existing pumping system (PS), without being overly intrusive for the PS, and without altering the control strategy or the hardware of the commercial WECS. The current work begins by presenting the modeling undertaken, which includes a WECS with pitchable blades, a doubly-fed induction generator (DFIG) together with its power converter, a centrifugal pump, an induction motor (IM) with its power converter, and an irrigation network with a pressure transducer. The second part consists of the proposed three-level controller: a general controller that regulates the WECS power demand according to the pumping pressure reference; three second-level controllers; two necessary for the WECS and one for the PS; and three first level controllers, two for controlling the power converters of the WECS generator and one for controlling the pump motor power converter. Finally, the simulation results of the proposed system control strategy are presented, showing its technical feasibility and good performance.

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“…8)- (10) [15] (pp. 216-217) of an induction machine in the stator reference frame (α, β) operating in generator mode (T gen ≤ 0) [16] (Figure 2).…”

Section: Drive Train Modelingmentioning

confidence: 99%

Contributions to Modeling, Simulation and Controlling of a Pumping System Powered by a Wind Energy Conversion System

2021

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“…Considering frequent malfunctioning issues at a hydraulic turbine are bearing related we made in the present paper a vibration analysis of different case studies consisting in tests were sliding bearings having different characteristics were used [1][2][3][4][5][6][7]. When building experimental stand we took into account main conditions the subassembly components should satisfy, as: high wear, corrosion and fatigue resistance, bearing must have two to four times less resistance than shaft, high stiffness, friction coefficient as low as possible, good lubricating conditions and thermal conductivity, simple and low cost maintenance, small differences between dilatations of bearing elements in order to remain close to the initial clearance [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Vibration Study for a Subassembly – Part of Hydraulic Turbines

Haţiegan

Stroia

Raduca

2019

International Conference KNOWLEDGE-BASED ORGANIZATION

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A common problem with hydraulic turbines is the rupture of turbine horizontal shaft in the area between the rotor and its bearing, caused by different stresses [1], as well as problems caused by excessive bearing wear, vibration caused by instability of lubricant film from bearings, lubrication supply interruption of hydrodynamic bearings, gripping, decrease of bearing stiffness due to fatigue of supporting structures. In addition, during operation, vibration appear depending on exciter forces or bearing type. In present paper we present an analysis of vibrations measured on a subassembly found at hydraulic turbines. For the experimental subassembly was used a straight-lined shaft, having variable cross-section, and a sliding type bearing. The tests were made for bearings of different dimensions and materials. Vibrations were measured on two axes for established case studies and results were compared.

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“…Considering that, in the start-up phase of an energy group with a unitary power of 330 MW, the consumers of own services are fed from the National Energy System, according to the norms in force, it is necessary to monitor the supply voltage [1][2][3][4][5][6][7]. The electricity supply of the consumers of own services, afferent to an energy group with a unitary power of 330 MW, is made in the starting phase of the group, from the National Power System through a system of collector bars, known as "main bars" [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Aspects on the Influence of Starting the Own Services Consumers of an Energy Group with Unit of 330 MW on the Power Supply

Popescu

Haţiegan

Racoceanu

et al. 2017

International Conference KNOWLEDGE-BASED ORGANIZATION

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The elaborated paper had as support a study case on the monitoring of the supply voltage on a busbar system, which feeds the electric motors that enters into the configuration of the technological flow of electricity production of an energy group with a unitary power of 330 MW. In the start-up phase of the energy groups with a unitary power of 330 MW, the consumers of their own services are supplied with electricity by means of general service transformers interconnected to the National Energy System.

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Determining the operating performance through electrical measurements of a hydro generator

Cited by 4 publications

References 9 publications

Contributions to Modeling, Simulation and Controlling of a Pumping System Powered by a Wind Energy Conversion System

Contributions to Modeling, Simulation and Controlling of a Pumping System Powered by a Wind Energy Conversion System

Vibration Study for a Subassembly – Part of Hydraulic Turbines

Aspects on the Influence of Starting the Own Services Consumers of an Energy Group with Unit of 330 MW on the Power Supply

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