PATENT CLAIM ANALYSIS

Application Number: 15944896
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-08
Patent Classification: ["290", "044000"]

Abstract:
A method and a system for adjusting a wind-turbine power take-off. The system comprises: a plurality of phase current sensors and a plurality of voltage sensors operatively connected to a synchronous electric generator, an active rectifier, and a micro-controller. Instructions stored on the micro-controller, when executed, are configured to cause the micro-controller to execute the method comprising: obtaining a measurement of generator's output phase voltages; determining rotor rotation angle based on the measured generator's output phase voltages; executing an optimization algorithm to determine an optimized speed of the synchronous electric generator based on a target energy value. The synchronous electric generator is controlled based on the determined optimized speed by at least one of: setting an electromagnetic torque on a shaft of the synchronous electric generator, setting currents in windings of the synchronous electric generator, and controlling the active rectifier boost converter function operating in conjunction with a down converter.

Claim (Index 17):
A method of adjusting wind turbine power take-off, based on controlling a speed of a wind turbine in accordance with an optimum speed search algorithm that estimates a change in an output energy for a given time interval as the rotational speed changes and sets a new speed value based on the values obtained;\n at the wind speed above a calculated wind speed, which corresponds to the nominal value of power, ensuring stabilization of the electromagnetic torque on the synchronous winding shaft, at the same time the control of the speed of rotation in the entire range of working wind speeds is carried out by a power take-off system consisting of: a synchronous generator with permanent magnets with a rotor position sensor mounted on a single shaft with a wind turbine; a power supply unit for electronic devices connected directly to the output of an electrical machine; an active rectifier with phase current sensors CS A , CS B , CS C , phase voltage sensors VS A , VS B , connected at the input, and a voltage sensor VS, a capacitor C 0 , a current sensor CS 1 , all three connected at the output, while the active rectifier is made with a vector control, implemented by a microprocessor programmable controller, providing the possibility of specifying the electromagnetic torque by forming sinusoidal, in-phase with EMF, currents of a given amplitude in the phase windings of the generator and converting them at the output of the active rectifier to the charging current of the DC link capacitor with a voltage higher than the consumer specified output voltage, this stabilization of the voltage in a predetermined range of values is provided by a down converter under control of the microprocessor controller at full power take-off by the consumer, and, if the full power take-off is impossible by consumer, the stabilization of the voltage is provided by a down converter and a ballast controlled by the microprocessor controller; the down converter, being controlled by the microprocessor controller, the down converter being configured to maintain voltage in a DC link between the active rectifier and the down converter within a predetermined range of values, as well as to lower the output voltage to the desired level of consumer and to limit a maximum current value for a short circuit protection; a ballast for removal of excess electricity under control of a microprocessor controller; a braking system associated with the windings of the synchronous electric generator, which, under the control of the microprocessor controller, produces a stepped braking of the synchronous electric generator or an emergency stop of the wind turbine, at the moment when the vector control is turned on and the generator rotates at no-load speed according to the voltage sensors VS A  and VS B , the phase voltage values U A  and U B  are determined, which are fed to the rotor rotation angle calculation block, the angle value is fed to the integrator and is set as the initial value of the rotor rotation angle, based on which transformations in blocks are produced, with the actual value of the rotor rotation angle different from the initial one, there is a mismatch in the current d-component, at the output of the PI-controller the value other than zero is obtained, which is supplied to an integrator, changes the value of the angle, implements dynamic determination of the actual rotor rotation angle, the position of the EMF vector is determined and the compensation for the current d-component is introduced.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 91.0
- Lexical Diversity: 1.96471
- Patent Class: 290.0
- Transitional Phrase Type: closed
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['10773851', '13130359', '10858721', '10858631', '13955788']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6577309122835427
- 35 USC 102 Novelty (BERT): 0.4919865425027329
- Combined Prediction Score: 0.6411564753054617
- Mean Citation Score: 237.113116
- Max Citation Score: 248.00883
- Similarity Product: 189.8638441051555

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test