US 12,535,058 B1Granted

Control method for de-icing blades of a wind power generator

AssigneesHuaneng Shaanxi Zichang Power Generation Co., Ltd., Huaneng Dingbian New Energy Power Generation Co., Ltd.

InventorsLe Wen, Feng Chang, Jun Liu, Yonghua Wu, Jinlu Hu, Yanqing Sun, Fabo Wang

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Abstract

Provided is a control method for de-icing blades of a wind power generator, including: Step S101: performing real-time monitoring of temperature of a surface of a blade of the wind power generator, and constructing a first positional temperature sequence at a time interval of v; and Step S102: calculating actual temperature at each position on the surface of the blade of the wind power generator according to the positional temperature sequence, and generating a second positional temperature sequence. In the present disclosure, it can be avoided that a discrepancy between the temperature acquired and the actual temperature of the surface of the wind power generator; and weight differences that may exist among three blades are taken into account, and synchronous de-icing operations are performed after eliminating the weight differences, so that ice treatment can be achieved without shutdown, and the stable operation of the wind power generator can be ensured.

A control method for de-icing blades of a wind power generator, comprising the following steps:

Step S101:
performing real-time monitoring of temperature of a surface of a blade of the wind power generator, and constructing a first positional temperature sequence at a time interval of v, the first positional temperature sequence comprising u units, and 1 unit representing temperature at a corresponding position on the surface of the blade of the wind power generator;
Step S102:
calculating actual temperature at each position on the surface of the blade of the wind power generator according to the first positional temperature sequence, and generating a second positional temperature sequence;
Step S103:
acquiring all second positional temperature sequences from current time to past Y hours to calculate a thickness of an ice layer at the each position on the surface of the blade of the wind power generator, and generating an ice layer thickness sequence, the ice layer thickness sequence comprising u units, and 1 unit representing the thickness of the ice layer at a corresponding position on the surface of the blade of the wind power generator;
and
Step S104:
calculating a de-icing scheme according to the ice layer thickness sequence, and performing de-icing on the each position of the blade of the wind power generator by heating in accordance with the de-icing scheme;
the de-icing scheme comprising de-icing temperature for the each position of the blade of the wind power generator;
and
Y, u, and v being self-defined parameters;
wherein a temperature sensor is disposed at the each position within the blade of the wind power generator, and the temperature of the surface of the blade of the wind power generator is acquired through the temperature sensor at the each position;
and
wherein step of calculating the actual temperature at the each position on the surface of the blade of the wind power generator comprises:
Step S201:
acquiring a heat conductivity of a material of the blade of the wind power generator, as well as a material thickness and a heat exchange coefficient at the each position;
Step S202:
calculating the actual temperature Tsurf at the each position on the surface of the blade of the wind power generator, a formula for calculating being specifically as follows:
T
s
⁢
u
⁢
r
⁢
f
=
T
i
⁢
n
⁢
t
+
T
i
⁢
n
⁢
t
-
T
a
⁢
m
⁢
b
t
k
+
1
h
-
A
;
in the formula, Tint represents the temperature acquired by the temperature sensor;
k represents the heat conductivity of the material of the blade of the wind power generator;
Tamb represents ambient temperature;
h represents the heat exchange coefficient of the material of the blade of the wind power generator;
A represents a heat conduction area of the corresponding position;
and t represents the material thickness at the corresponding position on the blade of the wind power generator.

59 more elements

Abstract

Claims6