The use of results of spectral analysis of synchronous generator output voltage for technical diagnostics.

Gasparjan, Alexander; Terebkov, Alexander; Terebkova, Marija

doi:10.1109/icit.2006.372566

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…The effective torque T d of the diesel engine is pulsating due to outbreaks of fuel in the engine cylinders. It also causes deviation ɛ of the angular velocity of the crankshaft of the diesel engine and oscillations of the angle Θ of the synchronous generator [16]. Therefore, it is obvious that the fluctuation of the angle Θ depends on the generator load current, the current and the instantaneous angular velocity of the diesel crankshaft.…”

Section: Mathematical Model Of Dieselmentioning

confidence: 99%

Spectral Analysis of Output Voltages and Currents as a Criterion for Technical Diagnostics of Synchronous Generators of Ship Diesel Engine

Gasparjans

Terebkov

Priednieks

et al. 2020

Latvian Journal of Physics and Technical Sciences

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Diesel generator sets (DGU) are very widely used in autonomous power supply systems. An example is marine power plants, diesel locomotives with electric power transmission, uninterruptible power supply units, etc. The power of ship DGUs reaches 2–6 or more MW in one unit. The number of units on ships can be different, but, as a rule, at least two. In this paper, we propose a method of monitoring the dynamic electromechanical system “diesel synchronous generator”. The method aims at using a synchronous generator machine as a multifunctional accurate and sensitive sensor for diagnostic parameters of the electromechanical system. The proposed method of technical diagnostics is based on continuous monitoring of non-uniformity of diesel torque, fluctuations in the instantaneous angular velocity and instantaneous angular acceleration of the diesel crankshaft. These data are the results of a spectral analysis of stator currents and voltages of a synchronous generator.

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Section: Mathematical Model Of Dieselmentioning

confidence: 99%

Spectral Analysis of Output Voltages and Currents as a Criterion for Technical Diagnostics of Synchronous Generators of Ship Diesel Engine

Gasparjans

Terebkov

Priednieks

et al. 2020

Latvian Journal of Physics and Technical Sciences

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show abstract

“…In this case the basis for the SG mathematical model is the system of equations for voltages in phase coordinates [19]. As the high level of harmonics exists as well as the transient and emergency regimes are necessary to be investigated its mathematical model is reasonable to be realised in phase frame for stator and in d-q frame for rotor.…”

Section: Generatormentioning

confidence: 99%

“…The investigations in this method for electric machines have been analysed in [17] for the steady-state as well as for dynamic regimes [18]. The spectral composition of the output currents and voltages is influenced by technical condition of the synchronous generator -wear of bearing units [19], (including failure of rotor, non-uniformity of the air gap), short-circuit of some turns of windings, etc. Such kind of monitoring discovers faults in the primary motordiesel (faults of crank gear), non-uniformity of the operating process in its cylinders (disturbances in fuel supply, valves regulation, etc.…”

Section: Introductionmentioning

confidence: 99%

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Monitoring of electro-mechanical system "diesel-synchronous generator"

Gasparjan

Terebkov

Zhiravetska

2015

2015 IEEE 5th International Conference on Power Engineering, Energy and Electrical Drives (POWERENG)

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A lot of methods exist for the diagnostics of synchronous generators and diesel engine installations. One of these methods is the diagnostics with the help of currents and voltages spectrum analysis. The spectral composition of the output currents and voltages is influenced by technical condition of the synchronous generator -wear of bearing units, shortcircuit of some turns of windings, etc. Such approach to the monitoring of the electro-mechanical "diesel-generator" system gives an opportunity to discover faults in the primary motordiesel, non-uniformity of the operating process in its cylinders, and in the synchronous generator itself. This method of technical diagnostics does not require a deep interference into the diesel system and generator scheme, and can be applied without breaking of the operation of the installation. Mathematical modelling of the diesel-generator system was realised with the help of special software. The software realises the mathematical modelling of diesel engine, generator and provides the dynamic balance of the system. A ship diesel-generator has been taken for the experimental investigations.

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Voltage Spectral Structure as a Parameter of System Technical Diagnostics of Ship Diesel Engine-Synchronous Generators

Gasparjans

Terebkovs

Zhiravetska

2015

Electrical, Control and Communication Engineering

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-A method of technical diagnostics of ship diesel engine -generator installation -is proposed. Spectral-power diagnostic parameters of the synchronous generator voltage and currents are used. The electric machine in this case is the multipurpose sensor of diagnostic parameters. A judgment on the quality of the operational processes in diesel engine cylinders and its technical condition is possible on the basis of these parameters. This method is applicable to piston compressor installations with electric drive. On the basis of such parameters as rotating torque, angular speed and angular acceleration it is possible to estimate the quality of the operating process in the cylinders of a diesel engine, the condition of its cylinder-piston group and the crank gear mechanism. The investigation was realized on the basis of a diesel-generator with linear load. The generator operation was considered for the case of constant RL load. Together with the above mentioned, the condition of bearings of synchronous machines, uniformity of the air gap, windings of the electric machine were estimated during the experiments as well. The frequency spectrum of the stator current of the generator was researched and analyzed. In this case the synchronous machine is becoming a rather exact multipurpose diagnostic sensor. The signal of nonuniformity in the operation process of diesel engine cylinders and its technical condition is the increasing of the amplitudes of typical frequencies.

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The use of results of spectral analysis of synchronous generator output voltage for technical diagnostics.

Cited by 4 publications

References 2 publications

Spectral Analysis of Output Voltages and Currents as a Criterion for Technical Diagnostics of Synchronous Generators of Ship Diesel Engine

Spectral Analysis of Output Voltages and Currents as a Criterion for Technical Diagnostics of Synchronous Generators of Ship Diesel Engine

Monitoring of electro-mechanical system "diesel-synchronous generator"

Voltage Spectral Structure as a Parameter of System Technical Diagnostics of Ship Diesel Engine-Synchronous Generators

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The use of results of spectral analysis of synchronous generator output voltage for technical diagnostics.

Cited by 4 publications

References 2 publications

Spectral Analysis of Output Voltages and Currents as a Criterion for Technical Diagnostics of Synchronous Generators of Ship Diesel Engine

Spectral Analysis of Output Voltages and Currents as a Criterion for Technical Diagnostics of Synchronous Generators of Ship Diesel Engine

Monitoring of electro-mechanical system &#x0022;diesel-synchronous generator&#x0022;

Voltage Spectral Structure as a Parameter of System Technical Diagnostics of Ship Diesel Engine-Synchronous Generators

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Monitoring of electro-mechanical system "diesel-synchronous generator"