PATENT CLAIM ANALYSIS

Application Number: 15759344
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["290", "044000"]

Abstract:
A multi-loop switching control system for a doubly-fed wind turbine based on logic switch control. Output variables of the doubly-fed wind turbine may be used to form output feedback control channels. Each output feedback control channel may switch between a switch controller and a vector controller to form a multi-loop switching controller. When a power system associated with the doubly-fed wind turbine is subjected to a relatively large external disturbance, state variables and the output variables of the wind turbine deviate from an original balance point, and the output feedback control loops of the doubly-fed wind turbine are switched from the vector controller to the switch controller. Under control of the switch controller, the state variables and output variables return to a vicinity of the original balance point, and the output feedback control loops of the wind turbine are switched from the switch controller to the vector controller.

Claim (Index 10):
A multi-loop switching control system based on logic switch control for controlling a doubly-fed wind turbine converter, the system comprising:\n a rotor speed control loop based on a vector control function; a rotor speed switch control loop including a second-order logic switch controller; a stator reactive power control loop based on the vector control function; a stator reactive power switch control loop including a first-order logic switch controller; a converter capacitor voltage control loop based on the vector control function; a converter capacitor voltage switch control loop including another second-order logic switch controller; a grid-side converter reactive power control loop based on the vector control function; a grid-side converter reactive power switch control loop including another first-order logic switch controller; a rotor speed control loop switching control unit; a stator reactive power control loop switching control unit; a converter capacitor voltage control loop switching control unit; and a grid-side converter reactive power control loop switching control unit, wherein the system receives a plurality of input signals including a rotor speed deviation signal, a stator reactive power output deviation signal, a converter capacitor voltage deviation signal, and a grid-side converter reactive power output error signal, wherein the system outputs a plurality of output signals including a rotor-side converter q-axis control voltage signal, a rotor-side converter d-axis control voltage signal, a grid-side converter d-axis control voltage signal, and a grid-side q-axis control voltage signal, wherein the plurality of input signals and the plurality of output signals respectively correspond to a plurality of feedback control channels, wherein the rotor speed deviation signal passes through the rotor speed control loop, the rotor speed switch control loop, and the rotor speed control loop switching control unit, and is output as the rotor-side converter q-axis control voltage signal, wherein the stator reactive power output deviation signal passes through the stator reactive power control loop, the stator reactive power switch control loop, and the stator reactive power control loop switching control unit, and is output as the rotor-side converter d-axis control voltage signal, wherein the converter capacitor voltage deviation signal passes through the converter capacitor voltage control loop, the converter capacitor voltage switch control loop, and the converter capacitor voltage control loop switching control unit, and is output as the grid-side converter d-axis control voltage signal, and wherein the grid-side converter output reactive power error signal passes through the grid-side converter reactive power control loop, the grid-side converter reactive power switch control loop, and the grid-side reactive power control loop switching control unit, and is output as the grid-side converter q-axis control voltage signal.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 90.0
- Lexical Diversity: 2.75439
- Patent Class: 290.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12996046', '11647124', '11477593', '13218311', '12293309']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6140248047347792
- 35 USC 102 Novelty (BERT): 0.5281724564462246
- Combined Prediction Score: 0.6054395699059237
- Mean Citation Score: 335.148848
- Max Citation Score: 342.86636
- Similarity Product: 270.58044715927844

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