Abstract: Unique systems, methods, techniques and apparatuses of an exciterless synchronous generator are disclosed. One exemplary embodiment is an exciterless synchronous generator comprising a stator, a rotor, and a startup excitation system. The stator includes a set of stator windings. The rotor includes an energy harvest winding, a DC power supply including a DC bus and coupled to the energy harvest winding, and a field winding coupled to the DC power supply. The startup excitation system comprises one of a magnetic field generation system structured to generate a magnetic field received by the energy harvest winding in response to a rotation of the rotor, wherein the magnetic field is converted to DC power with the DC power supply and transmitted to the field winding; or a rotor DC power source including and diode coupled in series across the DC bus.

Abstract: A method and device of determining a fault condition in a synchronous motor including a rotor provided with damper bars and an end ring to which the damper bars are mechanically connected thereby forming a damper cage, wherein the method includes: obtaining a first measurement of an end ring current from a first location along the end ring, processing the first measurement to thereby obtain a processing result, and determining whether a fault condition is present in the synchronous motor based on the processing result.

Abstract: A method for identifying a fault condition in an electrical machine in which at least a stator or a rotor has parallel winding branches is disclosed. A measurement is carried out for obtaining a set of circulating current values between two parallel winding branches of which each winding branch includes a single coil. A frequency analysis is applied on the set of circulating current values to obtain at least one frequency component. A fault condition of the electrical machine is determined on the basis of the at least one frequency component.

Abstract: A method for preventing a frequency component of a voltage from occurring in an electrical machine including the steps of: obtaining, either by measuring a voltage signal or a current signal from the electrical machine in time domain and transforming the measured signal into frequency domain, by simulating or deducing a first frequency component present in the electrical machine in absence of a grounding, the first frequency component representing a first undesired frequency higher than a limit frequency of 500 Hz; and providing the electrical machine with a first grounding at a grounding location, the first grounding including a resonant circuit resonating at the first undesired frequency. In order to get rid of harmful shaft voltages in the form of sharp voltage peaks at high frequencies, it is first necessary to determine at which undesired frequency or frequencies these voltage peaks occur.

Abstract: The present invention provides methods of assessing protein modification status and identifying biomarkers linked to cell signaling pathways. The invention provides a method of creating a dataset of modification sites, comprising grouping modification sites on modified peptides from a first sample which has been treated with a first modulator of a protein modifying enzyme and modification sites on modified peptides from a second sample which has been treated with a second modulator of the same protein modifying enzyme into a single group, according to the effect of said first and second modulators of said protein modifying enzyme on said modification sites, wherein said first and second modulators of said protein modifying enzyme are different. The invention further provides a method of preparing a database, methods of treatment and methods of diagnosis.

Abstract: A method and system of determining an electro-mechanical fault condition in a synchronous machine having a stator, a rotor, and exciter. The method includes: a) obtaining an exciter current signal which is a measurement of an exciter current through stationary windings of the exciter, b) transforming the exciter current signal to obtain an exciter current frequency spectrum, and c) determining whether an electro-mechanical fault condition is present, and a type of the electro-mechanical fault condition, based on harmonic content related to the frequency of the stator, of the exciter current frequency spectrum.

Abstract: A method of determining a fault condition in a synchronous machine. The method includes a) obtaining a field current signal and a shaft voltage signal of the synchronous machine, b) transforming the field current signal and the shaft voltage signal to obtain a field current frequency spectrum and a shaft voltage frequency spectrum, and c) determining whether a fault condition is present, and in case a fault condition is present identifying a type of the fault condition, based on harmonic content of the field current frequency spectrum and harmonic content of the shaft voltage frequency spectrum, wherein c) includes comparing the harmonic content of the field current frequency spectrum with fault condition field current signature spectra and comparing the harmonic content of the shaft voltage frequency spectrum with fault condition shaft voltage signature spectra.

Abstract: A method and system of determining an electro-mechanical fault condition in a synchronous machine having a stator, a rotor, and exciter. The method includes: a) obtaining an exciter current signal which is a measurement of an exciter current through stationary windings of the exciter, b) transforming the exciter current signal to obtain an exciter current frequency spectrum, and c) determining whether an electro-mechanical fault condition is present, and a type of the electro-mechanical fault condition, based on harmonic content related to the frequency of the stator, of the exciter current frequency spectrum.

Abstract: The present invention provides a method of quantifying the activity of a protein modifying enzyme in a sample, comprising: (i) grouping modified peptides from a first sample and modified peptides from a second sample into a single group according to one of the following parameters: (a) modified peptides having a modification site that is modified by the same protein modifying enzyme; or (b) modified peptides having a modification site that is part of the same modification motif; (ii) calculating enrichment of the modified peptides from the first sample compared to the modified peptides from the second sample in the group; and (iii) calculating the statistical significance of said enrichment; wherein a statistically significant enrichment is indicative of a protein modifying enzyme being activated in the first sample compared to the second sample. In some embodiments, the method further comprises identifying modified peptides in a first sample and a second sample using mass spectrometry (MS) prior to step (i).

Abstract: A method for discovering demagnetisation faults of a permanent magnet synchronous generator, such as a wind power generator. The method is performed during operation of the synchronous generator and includes measuring the vibration of the stator, performing a frequency analysis of the vibration, and deducing whether the generator suffers from demagnetization of a permanent magnet, from the vibration analysis. Moreover, geometric eccentricity faults and electric short circuit faults may also be detected from the vibration.

Abstract: The present invention provides a method for identifying differential activation of a bisubstrate protein modifying enzyme between samples, comprising: (i) incubating a first sample with x different concentrations of the non-protein substrate of said enzyme, wherein x is 2 or greater than 2; (ii) quantifying modification of a polypeptide in said sample at each of the x different concentrations of the non-protein substrate; (iii) determining the affinity of said enzyme for said non-protein substrate; (iv) repeating steps (i) to (iii) for a second or subsequent sample; and (v) comparing the affinity of said enzyme for said non-protein substrate between said samples; wherein a difference in affinity of said enzyme for said non-protein substrate between samples is indicative of differential activation of said enzyme between samples. The present invention also provides a method for identifying an in vivo substrate of a bisubstrate protein modifying enzyme.

Abstract: A method of determining a fault condition in a synchronous machine. The method includes a) obtaining a field current signal and a shaft voltage signal of the synchronous machine, b) transforming the field current signal and the shaft voltage signal to obtain a field current frequency spectrum and a shaft voltage frequency spectrum, and c) determining whether a fault condition is present, and in case a fault condition is present identifying a type of the fault condition, based on harmonic content of the field current frequency spectrum and harmonic content of the shaft voltage frequency spectrum, wherein c) includes comparing the harmonic content of the field current frequency spectrum with fault condition field current signature spectra and comparing the harmonic content of the shaft voltage frequency spectrum with fault condition shaft voltage signature spectra.

Abstract: A wind turbine includes a grid side converter coupled to a grid via a power line. The method includes determining a first active power reference and a first reactive power reference indicating a requested amount of active power and reactive power, respectively, depending on at least a wind turbine operation strategy; determining a positive and negative sequence components of a grid voltage; determining indications of an actual amount of active power and reactive power to be supplied by the grid side converter to the grid, respectively; generating a parameters defining a proportion of positive sequence current component and negative sequence current component to be injected by the grid side converter in order to supply active power and reactive power; and supplying, with the grid side converter, active and reactive power to the power line based on the current reference.

Abstract: For identifying a fault in an electrical machine vibration is measured in a plurality of radial directions of the stator. On the basis of the vibration measurements a vibration frequency and a mode shape of the vibration at this frequency is determined. Characteristics of the vibration in terms of both the vibration frequency and the mode shape are used to identify a fault condition of the electrical machine.

Abstract: The invention relates to a synchronous power controller for a generation system based on static power converters, said controller comprising two main blocks referred to as: block 1 (electric block) (10) and block 2 (electromechanical block) (20), electric block 1 (10) being, in turn, formed by a virtual electrical characteristic controller (11) and a virtual admittance controller (12) and the electromechanical block 2 (20) being formed by a virtual electromechanical characteristic controller (21) and an inertia and damping factor controller (22).

Abstract: A method for identifying a fault condition in an electrical machine in which at least a stator or a rotor has parallel winding branches is disclosed. A measurement is carried out for obtaining a set of circulating current values between two parallel winding branches of which each winding branch includes a single coil. A frequency analysis is applied on the set of circulating current values to obtain at least one frequency component. A fault condition of the electrical machine is determined on the basis of the at least one frequency component.

Abstract: The present invention provides a method for quantifying modified peptides in a sample, the method comprising: (a) obtaining peptides from the sample; (b) adding reference modified peptides to the peptides obtained in step (a) to produce a mixture of peptides and reference modified peptides; (c) carrying out mass spectrometry (MS) on said mixture of peptides and reference modified peptides to obtain data relating to the peptides in the sample; and (d) comparing the data relating to the peptides in the sample with data in a database of modified peptides using a computer program; wherein the database of modified peptides is compiled by a method comprising: (i) obtaining peptides from a sample; (ii) enriching modified peptides from the peptides obtained in step (i); (iii) carrying out liquid chromatography-tandem mass spectrometry (LC-MS/MS) on the enriched modified peptides obtained in step (ii); (iv) comparing the modified peptides detected in step (iii) to a known reference database in order to identify the mo

Abstract: The present invention relates to a grid monitoring system, in particular a grid monitoring system enabling real-time monitoring of grid variables, e.g. voltage and current, in electrical power systems, such as single or three-phase networks. The grid monitoring system includes a harmonic detection unit being adapted to subtract harmonics of an input signal before feeding the input signal to a plurality of signal generators in the harmonic detection unit.

Abstract: The present invention provides a method of quantifying the activity of a protein modifying enzyme in a sample, comprising: (i) grouping modified peptides from a first sample and modified peptides from a second sample into a single group according to one of the following parameters: (a) modified peptides having a modification site that is modified by the same protein modifying enzyme; or (b) modified peptides having a modification site that is part of the same modification motif; (ii) calculating enrichment of the modified peptides from the first sample compared to the modified peptides from the second sample in the group; and (iii) calculating the statistical significance of said enrichment; wherein a statistically significant enrichment is indicative of a protein modifying enzyme being activated in the first sample compared to the second sample. In some embodiments, the method further comprises identifying modified peptides in a first sample and a second sample using mass spectrometry (MS) prior to step (i).

Abstract: The invention provides novel healthy kidney biomarkers useful in the monitoring of renal function and in the prognosis and diagnosis of renal dysfunctions, especially those related to graft rejection. The invention further relates to methods for aiding in the evaluation, and design of personalized therapies in transplantation nephrology.