PATENT CLAIM ANALYSIS

Application Number: 15958246
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-09
Patent Classification: ["702", "182000"]

Abstract:
A method for evaluating power characteristics of wind turbines, an apparatus and a storage medium. By means of verifying master control operating data of the wind turbines (1), correcting nacelle wind speed data (2), and calculating a power curve of the wind turbines and a guarantee value for the power curve, a wind turbine power characteristics evaluation result (3) is obtained. The present method economically and efficiently evaluates a power characteristics curve for wind turbines, makes full use of existing operating data of the wind turbine master control system, and performs evaluation of the power characteristics of wind turbines of a same model in a wind farm. The method ensures accuracy and test efficiency, and controls test times within one month, thereby ensuring the reliability and high efficiency of the wind turbines.

Claim (Index 7):
The method according to  claim 6 , wherein calculating the measurement power curve and power curve guarantee value of the evaluated wind turbine generator according to the corrected nacelle wind velocity and output power of the wind turbine generator comprises:\n standardizing all measured data to a sea-level air density, and standardizing output power of a fixed-pitch and fixed-velocity stall regulation wind turbine generator according to an International Standardization Organization standard atmospheric density: P n = P 10 \ue89e min \u00b7 \u03c1 0 \u03c1 10 \ue89e min , where P n  is the standardized output power, P 10 min  is a measured power mean of 10 min, \u03c1 0  is a standard air density, and \u03c1 10 min  is an air density mean of 10 min, wherein \u03c1 10 min  is: \u03c1 10 \ue89e min = B 10 \ue89e min R 0 \u00b7 T 10 \ue89e min , where T 10 min  is an absolute air temperature mean of 10 min, B 10 min  is an air pressure mean of 10 min, and R 0  is a gas constant 287.05 J/(kg\u00d7K) of dry air; standardizing a wind velocity of an active power controlled wind turbine generator: V n = V 10 \ue89e \ue89e min \ue8a0 ( \u03c1 10 \ue89e \ue89e min \u03c1 0 ) 1 \ue89e / \ue89e 3 , where V n  is the standardized wind velocity, and V 10 min  is a measured wind velocity mean of 10 min; calculating a standardized mean wind velocity V i  and mean output power P i  of the interval i to be: V i = 1 N i \ue89e \u03a3 j = 1 N i \ue89e V n , i , j P i = 1 N i \ue89e \u03a3 j = 1 N i \ue89e P n , i , j , where V n,i,j  is a standardized wind velocity of an array j of the interval i, P n,i,j  is standardized mean output power of the array j of the interval i, and N i  is the number of arrays in the interval i of 10 min; obtaining measured Annual Energy Production (AEP) by the measurement power curve, obtaining guaranteed energy production by a power curve guaranteed by a contract, and estimating the annual energy production, AEP, according to the following formula: AEP = N h \ue89e \u03a3 i = 1 N \ue8a0 [ F \ue8a0 ( V i ) - F \ue8a0 ( V i - 1 ) ] \ue89e ( P i - 1 + P i 2 ) , where N h  is the number of hours in a year, and is about 8,760 hours, N is the number of the intervals, and F(V) is a Rayleigh cumulative probability distribution function of the wind velocity, wherein F(V) is F \ue8a0 ( V ) = 1 - exp \ue8a0 ( - \u03c0 4 \ue89e ( V V ave ) 2 ) , where V ave  is an annual mean wind velocity at a hub height, and V is the wind velocity; performing summation initialization setting: setting V i-1  to be equal to V i \u22120.5 m/s, and setting P i-1  to be equal to 0.0 kW; and adopting wind resource data at hub height, which is provided in a project engineering bidding document of the wind power plant, as the annual mean wind velocity of the hub height, and obtaining the power curve guarantee value k:\n k =(AEP-measured value/AEP-guarantee value)\u00d7100%.

Metadata:
- Claim Count in Document: 4.0
- Percentile: 91.0
- Lexical Diversity: 2.14286
- Patent Class: 702.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['12447505', '14000602', '14020754', '15622317', '11295275']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.2312049811237587
- 35 USC 102 Novelty (BERT): 0.4997325053761803
- Combined Prediction Score: 0.2580577335490009
- Mean Citation Score: 232.010922
- Max Citation Score: 239.52399
- Similarity Product: 161.29166789727688

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

Dataset: test