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 13):
The multi-loop switching control system according to  claim 10 , wherein at least one of the second-order logic switch controller and the another second-order logic switch controller generates a control signal based on the following control logic: q 1 \ue8a0 ( t ) = G \ue8a0 ( e \ue8a0 ( t ) , \u03d5 0 + - \u025b 0 + , \u03d5 0 - + \u025b 0 - , q 1 \ue8a0 ( t - ) ) , q 1 \ue8a0 ( 0 - ) = q 1 0 \u2208 { true , false } q \ue8a0 ( t ) = { G \ue8a0 ( e . \ue8a0 ( t ) , - \u03bb 1 - - \u025b 1 + , \u03d5 1 - + \u025b 1 - , q \ue8a0 ( t - ) ) , if \ue89e \ue89e q 1 \ue8a0 ( t ) = true G \ue8a0 ( e . \ue8a0 ( t ) , \u03d5 1 \u2032 - \u025b 1 + , \u03bb 1 + + \u025b 1 - , q \ue8a0 ( t - ) ) , if \ue89e \ue89e q 1 \ue8a0 ( t ) = false \ue89e \ue89e \n \ue89e q \ue8a0 ( 0 - ) = q 0 \u2208 { true , false } where q(t) is an output of the control logic, G(e, \u0113,  e , q old )=[e\u2265\u0113\u2228(e> e \u2227q old )], e is a tracking error output by the system, \u0113 is an upper bound of the tracking error,  e  is a lower bound of the tracking error, q old  is a logic value of a previous moment corresponding to the logic variable, \u2227 is the logic AND operation, \u2228 is the logic OR operation, where \u03c6 1 +  and \u03c6 1 \u2212  define an error interval of a first derivative of the output variable, which is F 1 :={\u0117\u2208 |\u03c6 1 \u2212 \u2264\u0117\u2264\u03c6 1 + }, \u03b5 1 +  and \u03b5 1 \u2212  define a safe distance within F 1 , \u03bb 1 +  and \u03bb 1 \u2212  are an increasing and a decreasing velocity, respectively, of ideal e within F 0 , and q 1 (t\u2212) is a logic value of q 1 (t) at the previous moment.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 90.0
- Lexical Diversity: 2.75439
- Patent Class: 290.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['12996046', '11647124', '11477593', '13218311', '12293309']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6420551082899699
- 35 USC 102 Novelty (BERT): 0.5330453461132512
- Combined Prediction Score: 0.6311541320722981
- Mean Citation Score: 335.148848
- Max Citation Score: 342.86636
- Similarity Product: 231.1751931475687

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test