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Judgment method for abnormal temperature of inverter cabinet in wind turbine nacelle

A technology of wind turbines and frequency converters, which is applied in the monitoring of wind turbines, wind turbines, and engines, etc., can solve the problems of unstable power data and temperature data relationship, uncertain power status of units, and large differences in power conditions, and achieve advanced Judging hidden dangers, avoiding deviations in judgment results, and the effect of good statistical functions

Active Publication Date: 2020-09-25
大唐向阳风电有限公司
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Problems solved by technology

[0004] From the perspective of actual operation, the abnormal temperature of the inverter cabinet is caused by various working conditions. The relationship between them is unstable, which will increase the false positive rate

Method used

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  • Judgment method for abnormal temperature of inverter cabinet in wind turbine nacelle

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Embodiment Construction

[0017] The following describes the embodiments of the present invention in detail with reference to the drawings.

[0018] Such as figure 1 Shown is a schematic diagram of the abnormal temperature judgment process of the inverter cabinet. The method for judging the abnormal temperature of the inverter cabinet of the wind turbine nacelle includes the following steps:

[0019] Step 1. Read the relevant data needed to judge the abnormal temperature of the inverter cabinet of the engine room;

[0020] Further, the required relevant data includes: data collection time, wind generator number, temperature of the inverter cabinet of the nacelle, and active power. The collection frequency of the data samples needs to be 0.2Hz to 1Hz, and the time stamps of the collected data should be consistent.

[0021] Step 2. Data processing:

[0022] S2.1. Obtain the data of multiple wind turbines that need to be tested for grid-connected operation for more than 12 hours, and remove the null data. When th...

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Abstract

The invention relates to a judgment method for temperature abnormality of a wind driven generator cabin frequency converter cabinet. Related data needed to judge the temperature abnormality of a cabinfrequency converter cabinet is read; the data is processed to round active power values and to obtain hour parts of time; the data is trained to calculate cabin frequency converter cabinet temperature confidence interval estimations per hour and per 100 kW, and two difference values between temperature instant values of each unit and upper and lower limits of the temperature confidence interval estimations are calculated for comparison; results are output; corresponding unit numbers are output; and fault handling methods combined to form prewarning work orders. The method reduces the wrong report rate through comprehensive analysis and judgment, judges hidden troubles beforehand to prevent the fault stop, prevents the judgment result deviation caused by different sampling time and regions, and achieves excellent statistics function on time and space distribution characteristics through the confidence interval estimations.

Description

Technical field [0001] The invention belongs to the technical field of maintenance of wind power generator equipment, and particularly relates to a method for judging abnormal temperature of a frequency converter cabinet of a wind power generator nacelle. Background technique [0002] Wind power generation converts natural wind energy into electrical energy, which can be used by users after being connected to the grid. In order to ensure the quality of wind power and facilitate unified distribution, frequency conversion technology is required to process wind power before grid connection and transmission. Wind power generators mainly include doubly-fed wind power generators and direct drive wind power generators, and they all need to intervene in the power grid through frequency converters. The inverter is a power electronic device that contains electronic components, electrolytic capacitors, etc. The temperature of the inverter cabinet has a greater impact on its life. [0003] Re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D17/00
CPCF03D17/00
Inventor 孙绪江吴广超马彦臧芳随德光郑雷
Owner 大唐向阳风电有限公司
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