CN113036716A - Generator winding fault protection method and device - Google Patents

Generator winding fault protection method and device Download PDF

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Publication number
CN113036716A
CN113036716A CN201911345054.0A CN201911345054A CN113036716A CN 113036716 A CN113036716 A CN 113036716A CN 201911345054 A CN201911345054 A CN 201911345054A CN 113036716 A CN113036716 A CN 113036716A
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quartile
generator winding
value
temperature data
effective
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CN113036716B (en
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刘磊
肖硕文
周玥
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Jinfeng Technology Co ltd
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Xinjiang Goldwind Science and Technology Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02—Means for indicating or recording specially adapted for thermometers
    • G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K15/00—Testing or calibrating of thermometers
    • G01K15/007—Testing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/25—Devices for sensing temperature, or actuated thereby
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Abstract

A generator winding fault protection method and apparatus are provided. The generator winding fault protection method comprises the following steps: acquiring temperature data of a generator winding within a preset time period; determining a range of effective values for the generator winding temperature based on the temperature data, the range of effective values based on the range of effective values; determining effective temperature data in the generator winding temperature data; the generator winding is subjected to fault protection according to the effective temperature data, the problems of sensor failure and the like can be effectively and accurately identified, the influence of the failure of individual temperature sensors on the overall temperature data is reduced, and therefore the redundancy protection capability of the generator temperature sensors is improved.

Description

Generator winding fault protection method and device
Technical Field
The present disclosure relates to the field of wind power generation technology. More particularly, the present disclosure relates to a generator winding fault protection method and apparatus.
Background
At present, in the monitoring of the temperature of the winding of the generator, a method of mutually redundantly using a plurality of temperature sensors is used for measuring the temperature of different winding positions of the generator. Namely, for a plurality of temperature sensors, taking the average value of all temperature sensor temperature instantaneous values as the average value of the generator winding temperature; and taking the maximum and minimum values of the instantaneous temperature values of all the temperature sensors as the maximum and minimum values of the temperature of the generator winding. By providing a redundant number of temperature sensors, the generator winding temperature can be monitored and protected by the master control system.
The existing mode for carrying out fault protection on the generator winding mainly monitors the maximum value of the temperature of the generator winding through a main control system, and when the maximum value of the temperature of the generator winding exceeds a threshold value, the fault protection is started; or comparing the temperature difference values of different windings of the generator, and starting fault protection when the temperature difference values of different windings of the generator exceed a preset difference value.
In the existing scheme, temperature failure can only be judged through the conditions of open circuit and short circuit of the sensor, the sensor cannot identify the temperature virtual high caused by virtual connection and looseness, and then judgment of average temperature and maximum temperature can be influenced, fault false triggering is caused, the unit is stopped, and power generation time and power generation amount are influenced.
Disclosure of Invention
An exemplary embodiment of the present disclosure is to provide a generator winding fault protection method and apparatus, so as to effectively and accurately identify the problem of individual sensor failure, and reduce the influence of individual temperature sensor failure on the overall temperature data, thereby effectively reducing the number of false alarms and enhancing the redundancy capability of the generator temperature sensor.
According to an exemplary embodiment of the present disclosure, there is provided a generator winding fault protection method including: acquiring temperature data of a generator winding within a preset time period; determining a range of valid values for the generator winding temperature based on the temperature data; determining valid temperature data in the generator winding temperature data based on the valid value range; and carrying out fault protection on the generator winding according to the effective temperature data.
Optionally, the step of determining a range of valid values for the generator winding temperature based on the temperature data may comprise: arranging the temperature data from small to large to obtain a sample number sequence; performing quartile method operation processing on the arranged data to determine a first quartile, a second quartile and a third quartile in the sample number array; and determining the effective value range of the generator winding temperature according to the determined first quartile, the second quartile and the third quartile.
Optionally, the step of determining the range of effective values of the generator winding temperature according to the determined first quartile, second quartile and third quartile may include: calculating the tolerance value of the first quartile and the third quartile; an effective value range for the generator winding temperature is determined based on the tolerance value.
Optionally, the step of determining the range of effective values of the generator winding temperature based on the tolerance value may comprise: acquiring the generating power of a generator; correcting the tolerance value according to the generated power to obtain a tolerance value correction value; and calculating the effective value range of the generator winding temperature according to the tolerance value correction value.
Optionally, the step of determining a first quartile, a second quartile and a third quartile in the array of sample numbers may comprise: calculating the arrangement positions of the first quartile, the second quartile and the third quartile in the sample number array; when the calculated numerical value of the arrangement position of the first quartile, the second quartile or the third quartile is an integer, taking the numerical value of the arrangement position of the first quartile, the second quartile or the third quartile in the sample number array as the first quartile, the second quartile or the third quartile; determining an integer arrangement position corresponding to the calculated arrangement position of the first quartile, the second quartile or the third quartile when the calculated numerical value of the arrangement position of the first quartile, the second quartile or the third quartile is not an integer; and taking the numerical value at the integer arrangement position in the sample number array as a first quartile, a second quartile or a third quartile.
Optionally, the step of fault protecting the generator winding according to the effective temperature data may comprise: calculating the maximum value and the minimum value of the effective temperature data; determining the number of failures of the generator winding temperature sensor according to the effective temperature data; and carrying out fault protection on the generator winding based on the maximum value and the minimum value of the effective temperature data and the failure number of the generator winding temperature sensor.
Optionally, the step of fault protecting the generator winding based on the maximum value and the minimum value of the effective temperature data and the failure number of the generator winding temperature sensor may comprise: and when the maximum value or the minimum value of the effective temperature data exceeds a preset effective temperature data range and the failure number of the generator winding temperature sensors exceeds a preset number range, carrying out fault protection on the generator winding.
Optionally, the step of fault protecting the generator winding based on the maximum value and the minimum value of the effective temperature data and the failure number of the generator winding temperature sensor may comprise: when the maximum value of the effective temperature data exceeds a maximum value threshold value, carrying out fault protection on a generator winding; when the minimum value of the effective temperature data exceeds a minimum value threshold value, carrying out fault protection on a generator winding; and when the failure number of the generator winding temperature sensors exceeds the preset number range, carrying out fault protection on the generator winding.
Optionally, the generator winding fault protection method may further include: and filtering the acquired temperature data, wherein the temperature data after filtering is used for determining the effective value range of the generator winding temperature.
Optionally, before the filtering processing is performed on the acquired temperature data, the generator winding fault protection method may further include: and temperature data collected by the sensor in the open circuit state and temperature data collected by the sensor in the short circuit state are removed from the acquired temperature data.
According to an exemplary embodiment of the present disclosure, there is provided a generator winding fault protection device including: the data acquisition unit is configured to acquire temperature data of the generator winding within a preset time period; a valid value range determination unit configured to determine a valid value range of the generator winding temperature based on the temperature data; a valid data determination unit configured to determine valid temperature data among the generator winding temperature data based on the valid value range; and a fault protection unit configured to fault protect the generator winding in accordance with the active temperature data.
Alternatively, the valid value range determination unit may be configured to: arranging the temperature data from small to large to obtain a sample number sequence; performing quartile method operation processing on the arranged data to determine a first quartile, a second quartile and a third quartile in the sample number array; and determining the effective value range of the generator winding temperature according to the determined first quartile, the second quartile and the third quartile.
Optionally, the valid value range determination unit may be further configured to: calculating the tolerance value of the first quartile and the third quartile; an effective value range for the generator winding temperature is determined based on the tolerance value.
Optionally, the valid value range determination unit is further configured to: acquiring the generating power of a generator; correcting the tolerance value according to the generated power to obtain a tolerance value correction value; and calculating the effective value range of the generator winding temperature according to the tolerance value correction value.
Optionally, the valid value range determination unit may be further configured to: calculating the arrangement positions of the first quartile, the second quartile and the third quartile in the sample number array; when the calculated numerical value of the arrangement position of the first quartile, the second quartile or the third quartile is an integer, taking the numerical value of the arrangement position of the first quartile, the second quartile or the third quartile in the sample number array as the first quartile, the second quartile or the third quartile; determining an integer arrangement position corresponding to the calculated arrangement position of the first quartile, the second quartile or the third quartile when the calculated numerical value of the arrangement position of the first quartile, the second quartile or the third quartile is not an integer; and taking the numerical value at the integer arrangement position in the sample number array as a first quartile, a second quartile or a third quartile.
Optionally, the fault protection unit may be configured to: calculating the maximum value and the minimum value of the effective temperature data; determining the number of failures of the generator winding temperature sensor according to the effective temperature data; and carrying out fault protection on the generator winding based on the maximum value and the minimum value of the effective temperature data and the failure number of the generator winding temperature sensor.
Optionally, the fault protection unit may be further configured to: when the maximum value of the effective temperature data exceeds a maximum value threshold value, carrying out fault protection on a generator winding; when the minimum value of the effective temperature data exceeds a minimum value threshold value, carrying out fault protection on a generator winding; and when the failure number of the generator winding temperature sensors exceeds the preset number range, carrying out fault protection on the generator winding.
Optionally, the generator winding fault protection device may further include: and the filtering processing unit is configured to perform filtering processing on the acquired temperature data, wherein the temperature data after filtering processing is used for determining the effective value range of the generator winding temperature.
Optionally, the generator winding fault protection device may further include: and a data culling unit configured to cull temperature data collected by the sensor in the open circuit state and temperature data collected by the sensor in the short circuit state from the acquired temperature data.
According to an exemplary embodiment of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out a generator winding fault protection method according to an exemplary embodiment of the present disclosure.
According to an exemplary embodiment of the present disclosure, there is provided a computing apparatus including: a processor; a memory storing a computer program which, when executed by the processor, implements a generator winding fault protection method according to an exemplary embodiment of the present disclosure.
According to the generator winding fault protection method and device disclosed by the exemplary embodiment of the disclosure, the temperature data of the generator winding in the preset time period is obtained, the effective value range of the generator winding temperature is determined based on the temperature data, the effective temperature data in the generator winding temperature data is determined based on the effective value range, the generator winding is subjected to fault protection according to the effective temperature data, the problems of sensor failure and the like can be effectively and accurately identified, the influence of the failure of individual temperature sensors on the whole temperature data is reduced, and therefore the redundancy protection capability of the generator temperature sensors is improved.
Additional aspects and/or advantages of the present general inventive concept will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the general inventive concept.
Drawings
The above and other objects and features of the exemplary embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate exemplary embodiments, wherein:
FIG. 1 shows a flow chart of a generator winding fault protection method according to an exemplary embodiment of the present disclosure;
FIG. 2 shows a block diagram of a generator winding fault protection device according to an exemplary embodiment of the present disclosure; and
fig. 3 shows a schematic diagram of a computing device according to an exemplary embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below in order to explain the present disclosure by referring to the figures.
Fig. 1 shows a flow chart of a generator winding fault protection method according to an exemplary embodiment of the present disclosure.
Referring to fig. 1, in step S101, temperature data of a generator winding within a preset time period is acquired.
In the exemplary embodiment of the disclosure, since electromagnetic interference may cause interference to the temperature sensor data after the generator is grid-connected, the obtained temperature data within the preset time period may be filtered, and the filtering parameter is set according to practical application experience. Here, the filtered temperature data may be used to determine a range of effective values for the generator winding temperature, and the method of determining the range of effective values will be described in detail below. Here, the preset time period may be, for example, but not limited to, 1 hour, 6 hours, 12 hours, 18 hours, 1 day, 2 days, 1 week, 2 weeks, and the like.
In an exemplary embodiment of the present disclosure, before filtering the acquired temperature data within the preset time period, the temperature data acquired by the sensor in the open state and the temperature data acquired by the sensor in the short state may be further removed from the acquired temperature data.
In step S102, a range of valid values for the generator winding temperature is determined based on the temperature data.
In an exemplary embodiment of the disclosure, when determining the range of the effective value of the generator winding temperature based on the temperature data, the temperature data may be arranged from small to large to obtain a sample number sequence, then the arranged data is subjected to quartile method operation processing to determine a first quartile, a second quartile and a third quartile in the sample number sequence, and finally the range of the effective value of the generator winding temperature is determined according to the determined first quartile, second quartile and third quartile.
In an exemplary embodiment of the present disclosure, when determining the range of effective values of the generator winding temperature according to the determined first quartile, second quartile, and third quartile, the tolerance values of the first quartile and the third quartile may be first calculated, and then the range of effective values of the generator winding temperature may be determined based on the tolerance values.
In an exemplary embodiment of the present disclosure, in determining the first quartile, the second quartile, and the third quartile in the sample number array, the arrangement positions of the first quartile, the second quartile, and the third quartile in the sample number array may be first calculated, and when the calculated value of the arrangement position of the first quartile, the second quartile, or the third quartile is an integer, the value at the arrangement position of the first quartile, the second quartile, or the third quartile in the sample number array is taken as the first quartile, the second quartile, or the third quartile; when the calculated numerical value of the arrangement position of the first quartile, the second quartile or the third quartile is not an integer, determining an integer arrangement position corresponding to the calculated arrangement position of the first quartile, the second quartile or the third quartile, and taking the numerical value at the integer arrangement position in the sample number array as the first quartile, the second quartile or the third quartile.
The quartile is a numerical value which is arranged from small to large in statistics and is divided into four equal parts at the positions of three dividing points, and is mostly applied to box line graph drawing in statistics.
Quartiles, also known as quartiles, are the division of all data into equal four parts, where:
the first quartile, which may also be referred to as the "smaller quartile," is equal to the 25 th% of the numbers in the sample after all values are arranged from small to large; the second quartile, which may also be referred to as the "median," is equal to the 50 th% of the numbers in the sample after all the numbers are arranged from small to large; the third quartile, which may also be referred to as the "larger quartile," is equal to the 75% of the numbers in the sample after all values are arranged from small to large.
The difference between the first quantile and the third quantile may also be referred to as a quartile range. It should be noted that, in general, three quantiles cannot exactly obtain a certain numerical value, and there are several processing methods for this case, and the results obtained by each method have a certain difference, but the difference is not very large.
Specifically, the first quartile, the second quartile, and the third quartile in the sample number series may be determined according to the following formulas:
Figure BDA0002333108700000061
Figure BDA0002333108700000062
Figure BDA0002333108700000063
Figure BDA0002333108700000064
Figure BDA0002333108700000065
here, a denotes a value in the sample number series;
n1、n2、n3: integer parts respectively representing equivalent arrangement positions of the first quartile, the second quartile and the third quartile in the number array;
k1、k2、k3: a decimal part respectively representing equivalent arrangement positions of the first quartile, the second quartile and the third quartile in the number array;
Q1、Q2、Q3: respectively representing a first quartile, a second quartile and a third quartile, or representing equivalent calculated values of the first quartile, the second quartile and the third quartile in a number array;
m represents the number of valid temperature data, i.e., the number of data in the total data that are within the valid value range.
The tolerance value represents an acceptable range of temperature values from the second quartile, and a minimum value and a maximum value for the tolerance value may be defined based on engineering experience. When the position of the quartile is calculated according to the quartile method, if the calculated position is not an integer, the calculated position is an equivalent arrangement position. When the position of the quartile is calculated according to the quartile method, if the calculated position is not an integer, the equivalent calculated value of the arrangement position is calculated according to the equivalent arrangement position.
Specifically, the tolerance value and the tolerance value correction value may be calculated according to the following formulas:
D＝c*(Q3-Q1)；
Dcorrected＝LIMIT(Dmin，D，Dmax)；
here, D: representing a tolerance value;
c: the scale factor is expressed and can be determined according to the requirement, and is generally 2;
Dmin、Dmax: respectively representing a lower limit value and an upper limit value of the tolerance value;
Dcorrected: and indicating the tolerance value correction value as the corrected tolerance value.
The tolerance value is determined by multiplying the difference between the third quartile and the first quartile by a scaling factor. The tolerance value is used for describing the discrete degree of numerical values at two ends of the sample data, the numerical value is larger, the numerical value variation degree is indicated to be larger, and otherwise, the variation degree is smaller. Because the tolerance value is not influenced by individual maximum values or minimum values at two ends, the value in the tolerance value range is more stable and reliable than the total sample value. Therefore, the range of effective values can be limited by the tolerance value to exclude the false high value caused by the false connection and the looseness of the sensor. And the data calculation is carried out by utilizing the effective value, so that the stability and the accuracy of the data are ensured.
The upper limit value and the lower limit value of the tolerance value are determined according to actual working conditions, for example, for the temperature of a generator winding, the upper limit value of the tolerance value is determined according to the temperature difference range of the highest value and the lowest value among sensors at different positions in the normal operation process of the fan. For the lower limit value of the tolerance value, since there may be a case where all the sensor temperature values are close to each other in the low power section, the tolerance value may be close to 0. At this time, the sample data value tends to the second quartile value. In the determination of valid values, some valid values are deleted by mistake because the tolerance value tends to 0. Under actual conditions, the conditions are normal conditions. Therefore, according to the actual operation condition, the lower limit value of the tolerance value is set, the offset value when the tolerance value approaches to 0 is increased, and the effective value is prevented from being deleted when the temperature difference of the sample is too small.
In order to reduce fault misjudgment under normal working conditions, the tolerance value can be corrected, when the effective value range of the generator winding temperature is determined based on the tolerance value, the generating power of the generator can be firstly obtained, the tolerance value is corrected according to the generating power, for example, when the generating power reaches 80% or more of rated power, the tolerance value is corrected to be an upper limit value, when the generating power is 20% or less of the rated power, the tolerance value is corrected to be a lower limit value, and further, the effective value range of the generator winding temperature is calculated according to the tolerance value correction value.
Specifically, the range of effective values of the generator winding temperature may be
Figure BDA0002333108700000081
In step S103, effective temperature data among the generator winding temperature data is determined based on the effective value range.
Specifically, the generator winding temperature data is judged through the determined effective value range, and effective temperature data is obtained. That is, the generator winding temperature data within the effective value range is effective temperature data.
In step S104, the generator winding is fault protected according to the effective temperature data.
In an exemplary embodiment of the present disclosure, when fault protecting the generator winding based on the effective temperature data, the maximum value and the minimum value of the effective temperature data may be first calculated, then the number of failures of the generator winding temperature sensor may be determined according to the effective temperature data, and finally fault protecting the generator winding based on the maximum value and the minimum value of the effective temperature data and the number of failures of the generator winding temperature sensor may be performed. Specifically, the maximum and minimum temperatures in the effective temperature data may be determined as the maximum and minimum values of the effective temperature data, respectively. The effective number of the generator winding temperature sensors can be determined according to which generator winding temperature sensors collect the effective temperature data, and then the effective number of the generator winding temperature sensors is subtracted from the total number of the generator winding temperature sensors to obtain the failure number of the generator winding temperature sensors.
In an exemplary embodiment of the present disclosure, when the generator winding is fault-protected based on the maximum value and the minimum value of the effective temperature data and the number of failures of the generator winding temperature sensor, the generator winding may be fault-protected only when the maximum value of the effective temperature data exceeds a maximum value threshold; when the minimum value of the effective temperature data exceeds a minimum value threshold value, carrying out fault protection on a generator winding; when the failure number of the generator winding temperature sensors exceeds the preset number range, carrying out fault protection on the generator winding; in other cases, the generator windings are not failsafe.
Specifically, the maximum and minimum values in the effective temperature data may be calculated using the effective temperature data, and the number of failures of the generator winding temperature sensor may be calculated. The maximum value and the minimum value in the effective temperature data and the failure number of the generator winding temperature sensor are used for fault protection. The maximum threshold may be, for example, but not limited to, 140 ℃, 145 ℃, 150 ℃, 155 ℃, 160 ℃, etc. The minimum threshold may be, for example, but not limited to, -30 ℃, -35 ℃, -40 ℃, -45 ℃, -50 ℃ and the like.
A generator winding fault protection method according to an exemplary embodiment of the present disclosure has been described above in connection with fig. 1. Hereinafter, a generator winding fault protection device and units thereof according to an exemplary embodiment of the present disclosure will be described with reference to fig. 2.
Fig. 2 shows a block diagram of a generator winding fault protection device according to an exemplary embodiment of the present disclosure.
Referring to fig. 2, the generator winding fault protection device includes a data acquisition unit 21, an effective value range determination unit 22, an effective data determination unit 23, and a fault protection unit 24.
The data acquisition unit 21 is configured to acquire temperature data of the generator winding within a preset time period.
In an exemplary embodiment of the present disclosure, the generator winding fault protection device may further include a filter processing unit (not shown) configured to filter the acquired temperature data. Here, the filtered temperature data is used to determine a range of valid values for the generator winding temperature.
In an exemplary embodiment of the present disclosure, the generator winding fault protection device may further include a data culling unit (not shown) configured to cull temperature data collected by the sensor in the open state and temperature data collected by the sensor in the short state from the acquired temperature data.
The effective value range determination unit 22 is configured to determine an effective value range of the generator winding temperature based on the temperature data.
In an exemplary embodiment of the present disclosure, the valid value range determination unit 22 may be configured to: arranging the temperature data from small to large to obtain a sample number sequence; performing quartile method operation processing on the arranged data to determine a first quartile, a second quartile and a third quartile in the sample number array; and determining the effective value range of the generator winding temperature according to the determined first quartile, the second quartile and the third quartile.
In an exemplary embodiment of the present disclosure, the valid value range determination unit 22 may be further configured to: calculating the tolerance value of the first quartile and the third quartile; an effective value range for the generator winding temperature is determined based on the tolerance value. In an exemplary embodiment of the present disclosure, the valid value range determination unit 22 may be further configured to: acquiring the generating power of a generator; correcting the tolerance value according to the generated power to obtain a tolerance value correction value; and calculating the effective value range of the generator winding temperature according to the tolerance value correction value.
In an exemplary embodiment of the present disclosure, the valid value range determination unit 22 may be further configured to: calculating the arrangement positions of the first quartile, the second quartile and the third quartile in the sample number array; when the calculated numerical value of the arrangement position of the first quartile, the second quartile or the third quartile is an integer, taking the numerical value of the arrangement position of the first quartile, the second quartile or the third quartile in the sample number array as the first quartile, the second quartile or the third quartile; determining an integer arrangement position corresponding to the calculated arrangement position of the first quartile, the second quartile or the third quartile when the calculated numerical value of the arrangement position of the first quartile, the second quartile or the third quartile is not an integer; and taking the numerical value at the integer arrangement position in the sample number array as a first quartile, a second quartile or a third quartile.
The valid data determining unit 23 is configured to determine valid temperature data of the generator winding temperature data based on the valid value range.
The fault protection unit 24 is configured to fault protect the generator windings in dependence of said active temperature data.
In an exemplary embodiment of the present disclosure, the fault protection unit 24 may be configured to: calculating the maximum value and the minimum value of the effective temperature data; determining the number of failures of the generator winding temperature sensor according to the effective temperature data; and carrying out fault protection on the generator winding based on the maximum value and the minimum value of the effective temperature data and the failure number of the generator winding temperature sensor.
In an exemplary embodiment of the present disclosure, the fault protection unit 24 may be further configured to: when the maximum value of the effective temperature data exceeds a maximum value threshold value, carrying out fault protection on a generator winding; when the minimum value of the effective temperature data exceeds a minimum value threshold value, carrying out fault protection on a generator winding; and when the failure number of the generator winding temperature sensors exceeds the preset number range, carrying out fault protection on the generator winding.
Further, according to an exemplary embodiment of the present disclosure, there is also provided a computer readable storage medium having stored thereon a computer program which, when executed, implements a generator winding fault protection method according to an exemplary embodiment of the present disclosure.
In an exemplary embodiment of the disclosure, the computer readable storage medium may carry one or more programs which, when executed, implement the steps of: acquiring temperature data of a generator winding within a preset time period; determining a range of effective values for the generator winding temperature based on the temperature data, the range of effective values based on the determination; obtaining effective temperature data in the generator winding temperature data; fault protection of the generator winding is performed based on the active temperature data.
A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In embodiments of the present disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer program embodied on the computer readable storage medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, optical cables, RF (radio frequency), etc., or any suitable combination of the foregoing. The computer readable storage medium may be embodied in any device; it may also be present separately and not assembled into the device.
A generator winding fault protection device according to an exemplary embodiment of the present disclosure has been described above in connection with fig. 2. Next, a computing device according to an exemplary embodiment of the present disclosure is described with reference to fig. 3.
Fig. 3 shows a schematic diagram of a computing device according to an exemplary embodiment of the present disclosure.
Referring to fig. 3, the computing device 3 according to an exemplary embodiment of the present disclosure comprises a memory 31 and a processor 32, the memory 31 having stored thereon a computer program which, when executed by the processor 32, implements a generator winding fault protection method according to an exemplary embodiment of the present disclosure.
In an exemplary embodiment of the disclosure, the computer program, when executed by the processor 32, may implement the steps of: acquiring temperature data of a generator winding within a preset time period; determining a range of effective values for the generator winding temperature based on the temperature data, the range of effective values based on the determination; obtaining effective temperature data in the generator winding temperature data; fault protection of the generator winding is performed based on the active temperature data.
The computing device illustrated in fig. 3 is only one example and should not impose any limitations on the functionality or scope of use of embodiments of the disclosure.
Generator winding fault protection methods and apparatus according to exemplary embodiments of the present disclosure have been described above with reference to fig. 1-3. However, it should be understood that: the generator winding fault protection device and its elements shown in fig. 2 may each be configured as software, hardware, firmware, or any combination thereof that performs a particular function, the computing device shown in fig. 3 is not limited to including the components shown above, but rather some components may be added or deleted as desired, and the above components may also be combined.
According to the generator winding fault protection method and device disclosed by the exemplary embodiment of the disclosure, the temperature data of the generator winding in the preset time period is obtained, the effective value range of the generator winding temperature is determined based on the temperature data, the effective temperature data in the generator winding temperature data is determined based on the effective value range, and the generator winding is subjected to fault protection according to the effective temperature data, so that the problems of sensor failure and the like can be effectively and accurately identified, the influence of the failure of individual temperature sensors on the overall temperature data is reduced, and the redundancy protection capability of the generator temperature sensors is improved.
While the present disclosure has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the following claims.

Claims (20)

1. A generator winding fault protection method, comprising:
acquiring temperature data of a generator winding within a preset time period;
determining a range of valid values for the generator winding temperature based on the temperature data;
determining valid temperature data in the generator winding temperature data based on the valid value range;
and carrying out fault protection on the generator winding according to the effective temperature data.
2. The method of claim 1, wherein the step of determining a range of valid values for the generator winding temperature based on the temperature data comprises:
arranging the temperature data from small to large to obtain a sample number sequence;
performing quartile method operation processing on the arranged data to determine a first quartile, a second quartile and a third quartile in the sample number array;
and determining the effective value range of the generator winding temperature according to the determined first quartile, the second quartile and the third quartile.
3. The method of claim 2, wherein determining the range of valid values for the generator winding temperature based on the determined first quartile, second quartile, and third quartile comprises:
calculating the tolerance value of the first quartile and the third quartile;
an effective value range for the generator winding temperature is determined based on the tolerance value.
4. The method of claim 3, wherein determining the range of effective values to calculate the generator winding temperature based on the tolerance value comprises:
acquiring the generating power of a generator;
correcting the tolerance value according to the generated power to obtain a tolerance value correction value;
and calculating the effective value range of the generator winding temperature according to the tolerance value correction value.
5. The method of claim 2, wherein determining a first quartile, a second quartile, and a third quartile in the array of sample numbers comprises:
calculating the arrangement positions of the first quartile, the second quartile and the third quartile in the sample number array;
when the calculated numerical value of the arrangement position of the first quartile, the second quartile or the third quartile is an integer, taking the numerical value of the arrangement position of the first quartile, the second quartile or the third quartile in the sample number array as the first quartile, the second quartile or the third quartile;
determining an integer arrangement position corresponding to the calculated arrangement position of the first quartile, the second quartile or the third quartile when the calculated numerical value of the arrangement position of the first quartile, the second quartile or the third quartile is not an integer;
and taking the numerical value at the integer arrangement position in the sample number array as a first quartile, a second quartile or a third quartile.
6. The method of claim 1, wherein the step of fault protecting the generator winding from the active temperature data comprises:
calculating the maximum value and the minimum value of the effective temperature data;
determining the number of failures of the generator winding temperature sensor according to the effective temperature data;
and carrying out fault protection on the generator winding based on the maximum value and the minimum value of the effective temperature data and the failure number of the generator winding temperature sensor.
7. The method of claim 6, wherein the step of fault protecting the generator winding based on the maximum value, the minimum value of the active temperature data and the number of failures of the generator winding temperature sensor comprises:
when the maximum value of the effective temperature data exceeds the maximum value threshold of the effective temperature data, fault protection is carried out on the generator winding;
when the minimum value of the effective temperature data exceeds a minimum value threshold value, carrying out fault protection on a generator winding;
and when the failure number of the generator winding temperature sensors exceeds the preset number range, carrying out fault protection on the generator winding.
8. The method of any of claims 1-7, further comprising:
the acquired temperature data is subjected to a filtering process,
and the temperature data after filtering processing is used for determining the effective value range of the generator winding temperature.
9. The method of claim 8, further comprising, prior to filtering the acquired temperature data:
and temperature data collected by the sensor in the open circuit state and temperature data collected by the sensor in the short circuit state are removed from the acquired temperature data.
10. A generator winding fault protection device comprising:
the data acquisition unit is configured to acquire temperature data of the generator winding within a preset time period;
a valid value range determination unit configured to determine a valid value range of the generator winding temperature based on the temperature data;
a valid data determination unit configured to determine valid temperature data among the generator winding temperature data based on the valid value range; and
a fault protection unit configured to fault protect the generator winding according to the active temperature data.
11. The apparatus of claim 10, wherein the valid value range determination unit is configured to:
arranging the temperature data from small to large to obtain a sample number sequence;
performing quartile method operation processing on the arranged data to determine a first quartile, a second quartile and a third quartile in the sample number array; and determining the effective value range of the generator winding temperature according to the determined first quartile, the second quartile and the third quartile.
12. The apparatus of claim 11, wherein the valid value range determination unit is further configured to:
calculating the tolerance value of the first quartile and the third quartile;
an effective value range for the generator winding temperature is determined based on the tolerance value.
13. The apparatus of claim 12, wherein the valid value range determination unit is further configured to:
acquiring the generating power of a generator;
correcting the tolerance value according to the generated power to obtain a tolerance value correction value;
and calculating the effective value range of the generator winding temperature according to the tolerance value correction value.
14. The apparatus of claim 11, wherein the valid value range determination unit is further configured to:
calculating the arrangement positions of the first quartile, the second quartile and the third quartile in the sample number array;
when the calculated numerical value of the arrangement position of the first quartile, the second quartile or the third quartile is an integer, taking the numerical value of the arrangement position of the first quartile, the second quartile or the third quartile in the sample number array as the first quartile, the second quartile or the third quartile;
determining an integer arrangement position corresponding to the calculated arrangement position of the first quartile, the second quartile or the third quartile when the calculated numerical value of the arrangement position of the first quartile, the second quartile or the third quartile is not an integer;
and taking the numerical value at the integer arrangement position in the sample number array as a first quartile, a second quartile or a third quartile.
15. The apparatus of claim 10, wherein the fault protection unit is configured to:
calculating the maximum value and the minimum value of the effective temperature data;
determining the number of failures of the generator winding temperature sensor according to the effective temperature data;
and carrying out fault protection on the generator winding based on the maximum value and the minimum value of the effective temperature data and the failure number of the generator winding temperature sensor.
16. The apparatus of claim 15, wherein the fault protection unit is further configured to:
when the maximum value of the effective temperature data exceeds a maximum value threshold value, carrying out fault protection on a generator winding;
when the minimum value of the effective temperature data exceeds a minimum value threshold value, carrying out fault protection on a generator winding;
and when the failure number of the generator winding temperature sensors exceeds the preset number range, carrying out fault protection on the generator winding.
17. The apparatus of any of claims 10-16, further comprising:
a filter processing unit configured to perform filter processing on the acquired temperature data,
and the temperature data after filtering processing is used for determining the effective value range of the generator winding temperature.
18. The apparatus of claim 15, further comprising:
and a data culling unit configured to cull temperature data collected by the sensor in the open circuit state and temperature data collected by the sensor in the short circuit state from the acquired temperature data.
19. A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the generator winding fault protection method of any of claims 1 to 9.
20. A computing device, comprising:
a processor;
a memory storing a computer program which, when executed by a processor, implements the generator winding fault protection method of any one of claims 1 to 9.
CN201911345054.0A 2019-12-24 2019-12-24 Generator winding fault protection method and device Active CN113036716B (en)

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