LU504984B1 - Fault detection method and device for high-voltage power distribution system of power plant - Google Patents
Fault detection method and device for high-voltage power distribution system of power plant Download PDFInfo
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- 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
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/005—Circuits arrangements for indicating a predetermined temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/01—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using semiconducting elements having PN junctions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
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- G08B21/185—Electrical failure alarms
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The present invention relates to a fault detection method and device for a high-voltage power distribution system of a power plant. The method includes: detecting parameter information about a target detected part of each station in the high-voltage power distribution system of the power plant in real time; determining a warning level based on the parameter information and preset warning level information about the target detected part; and displaying the number of current pre-warning and alarm in real time when a warning or alarm occurs in the high-voltage power distribution system of the power plant. Historical data for the maintenance of a high-voltage device is provided by recording real-time operating temperature data of the high-voltage device and a voltage of a wireless temperature sensor itself, to realize the function of thermal fault prediction and maintenance of the device.
Description
FAULT DETECTION METHOD AND DEVICE FOR HIGH-VOLTAGE POWER 0506984
DISTRIBUTION SYSTEM OF POWER PLANT
The present invention relates to the technical field of fault detection of an electrical device, in particular to a fault detection method and device for a high-voltage power distribution system of a power plant.
In recent years, electric power enterprises have become an increasingly hot industry, on the one hand, supporting China's national electricity, on the other hand, promoting China's economic development and creating valuable profits. However, high-voltage power is a main way of power transmission in power enterprises, the quality of high-voltage power has been widely concerned.
At the same time, the focus of power enterprises also includes the improving of the analysis of the operation of high-voltage distribution lines and the stability of the operation of distribution lines.
However, in the prior art, the traditional fault detection methods of a high-voltage power distribution system are all based on fault diagnosis detections after fault occur, and cannot pre-warn in advance before the faults occur. In addition, the detection of the high-voltage power distribution system relies on a form of manpower; since temperature monitoring points of a high-voltage electrical device are all in the environment of high voltage, large current and strong magnetic field, and even some monitoring points are still in a closed space, it is dangerous for workers to enter the site for detection. It is an urgent technical problem for those skilled in the art to provide a fault detection method and device for a high-voltage power distribution system of a power plant.
An object of the present invention is to provide a fault detection method and device for a high-voltage power distribution system of a power plant. According to the present invention, a wireless temperature sensor is directly mounted to each high-voltage switch, bus connector, outdoor switch, transformer and other electrical contacts which are prone to generate high temperature. Historical data for the maintenance of a high-voltage device is provided by recording real-time operating temperature data of the high-voltage device and a voltage of a wireless temperature sensor itself via a terminal host, to realize the function of thermal fault 904984 prediction and maintenance of the high-voltage device.
The present invention improves the problems in the prior art that the conventional fault detection modes of the high-voltage power distribution system, are all based on the fault diagnosis detections after faults occur, and cannot pre-warn in advance before the faults occur.
According to the present invention, a warning level is determined based on relevant parameters by real-time detection of the temperature of the target detected part of each station in the high-voltage distribution system of the power plant and the voltage of the detection device itself.
Since a high-voltage switch, a bus connector and a transformer easily become high temperature, the operation state can be determined in advance by directly detecting the temperature, and then the fault detection can be determined. Historical data for the maintenance of a high-voltage device is provided by real-time operating temperature data of the high-voltage device to realize thermal fault prediction and maintenance of the high-voltage device.
The present invention improves the problems in the prior art that since temperature monitoring points of a high-voltage electrical device are all in the environment of high voltage, large current and strong magnetic field, and even some monitoring points are still in a closed space, it is dangerous for workers to enter the site for detection. According to the present invention, a wireless temperature sensor is added, which adopts radio waves for signal transmission and is mounted on the high-voltage device and in wireless connection to a receiving device, induced electricity of an electrical device providing power source, which greatly improves the use experience of a temperature sensor, eliminates the trouble of replacing shutdown busbar with traditional batteries, and improves the use convenience of sensor.
In order to achieve the above object, the present invention provides the following technical solutions.
A fault detection method for a high-voltage power distribution system of a power plant includes: detecting parameter information about a target detected part of each station in the high-voltage power distribution system of the power plant in real time, where the target detected part includes an upper contact, a lower contact, a busbar and a cable, and the parameter information includes temperature information TO about the target detected part and voltage information VO about a detection device itself: 0504984 determining a warning level based on the parameter information and preset warning level information about the target detected part, where the preset warning level information is divided from high to low into: first level warning information, second level warning information and third level warning information, when TO < -10°C or TO > 60°C, a warning level of the target detected part is set as the first level warning information, when-10°C < TO < 10°C or 60°C > TO > 40°C, a warning level of the target detected part is set as the second level warning information, when 10°C < TO < 40, a warning level of the target detected part is set as the third level warning information, and when TO < -20°C or TO > 90°C, the target detected part is alarmed; and displaying the number of current pre-warning and alarm in real time when a warning or alarm occurs in the high-voltage power distribution system of the power plant, and displaying an alarmed target detected part in real time.
In some examples of the present application, the method further includes: determining a pre-warning level based on the parameter information and preset voltage warning information, where when 2700 mV > VO > 2500 mV, the target detected part is warned, and when VO > 2700 mV, the target detected part 1s alarmed; and recording the voltage information VO of the detection device itself when a warning occurs in the target detected part.
In some examples of the present application, the when a warning occurs in the high-voltage power distribution system of the power plant further includes: recording the temperature information TO of the target detected part where the warning occurs, determining a monthly maximum temperature of the target detected part based on the temperature information TO, and generating a maximum temperature histogram of the target detected part; and determining that the target detected part has a fault when a maximum temperature of the target detected part in the histogram is continuously higher than a preset maximum temperature standard value within a preset month time, and replacing a component of the target detected part, 204984
In some examples of the present application, a first preset voltage warning level DI, a second preset voltage warning level D2, a third preset voltage warning level D3, a fourth preset voltage warning level D4 and a fifth preset voltage warning level DS are preset, where D1 > D2 >
D3 >D4> D5; a first preset history voltage L1, a second preset history voltage L2, a third preset history voltage L3 and a fourth preset history voltage LA are preset, where L1> L2> L3> LA; and when a warning occurs, a voltage warning level is set according to a relationship between the voltage information VO and each of preset history voltages: when VO > L1, a voltage warning level of the target detected part when the warning occurs is set as the first preset voltage warning level D1; when L1 > VO > L2, a voltage warning level of the target detected part when the warning occurs is set as the second preset voltage warning level D2; when L2 > VO > L3, a voltage warning level of the target detected part when the warning occurs is set as the third preset voltage warning level D3; when L3 > VO > LA, a voltage warning level of the target detected part when the warning occurs is set as the fourth preset voltage warning level D4; and when V4 > LO, a voltage warning level of the target detected part when the warning occurs is set as the fifth preset voltage warning level DS.
In some examples of the present application, when the warning occurs, the voltage information VO of the detection device itself where the warning occurs is recorded, and a monthly average warning voltage value V of the detection device itself is calculated and determined based on the voltage information VO; a first preset voltage difference value al, a second preset voltage difference value a2, a third preset voltage difference value a3 and a fourth preset voltage difference value a4 are set, where al <a2 <a3 <a4; the monthly average warning voltage value V of the detection device itself is determined, and after an i preset voltage warning level Di is determined as a history voltage level Di corresponding to V according to a relationship between V and each of the preset history voltages, 1 = 1, 2, 3, 4 and 5, a fault prediction level is determined according to a relationship between a difference value a0 between the voltage information VO and V and each of the preset voltage 504984 difference values; when VO-V < al, the voltage warning level Di is set as the fault prediction level; when al < VO-V < a2, the voltage warning level Di after being upgraded by one level is set 5 as the fault prediction level, and if i = 1 at this moment, the first preset voltage warning level D1 is directly set as the fault prediction level, when a2 < La-LO01 < a3, the voltage warning level Di after being upgraded by two levels is set as the fault prediction level, and if i = 1 at this moment, the first preset voltage warning level
D1 is directly set as the fault prediction level, when a3 < La-LO01 < a4, the voltage warning level Di after being upgraded by three levels is set as the fault prediction level, and if i = 1 at this moment, the first preset voltage warning level
D1 is directly set as the fault prediction level; and when a4 < La-LO1, the first preset voltage warning level D1 is set as the fault prediction level.
In order to achieve the above object, the present invention correspondingly provides a fault detection device for a high-voltage power distribution system of a power plant, including: a wireless temperature sensor, configured to detect parameter information about a target detected part of each station in the high-voltage power distribution system of the power plant in real time, where the target detected part includes an upper contact, a lower contact, a busbar and a cable, and the parameter information includes temperature information TO about the target detected part and voltage information VO about the wireless temperature sensor; a data processing unit, configured to determine a warning level based on the parameter information and preset warning level information about the target detected part, where the preset warning level information is divided from high to low into: first level warning information, second level warning information and third level warning information, when TO < -10°C or TO > 60°C, a warning level of the target detected part is set as the first level warning information, when-10°C < TO < 10°C or 60°C > TO > 40°C, a warning level of the target detected part is set as the second level warning information, when 10°C < TO < 40, a warning level of the target detected part is set as the third level warning information, and 7504984 when TO < -20°C or TO > 90°C, the target detected part is alarmed; and a terminal host, configured to display the number of current pre-warning and alarm in real time when a warning or alarm occurs in the high-voltage power distribution system of the power plant, and display an alarmed target detected part in real time.
In some examples of the present application, the data processing unit is further configured to determine a pre-warning level based on the parameter information and preset voltage warning information, where, when 2700 mV > VO > 2500 mV, the target detected part is warned, and when VO > 2700 mV, the target detected part is alarmed; and record the voltage information VO of the detection device itself when a warning occurs in the target detected part.
In some examples of the present application, the data processing unit is further configured to record the temperature information TO of the target detected part where the warning occurs, determine a monthly maximum temperature of the target detected part based on the temperature information TO, and generate a maximum temperature histogram of the target detected part; and determine that the target detected part has a fault when a maximum temperature of the target detected part in the histogram is continuously higher than a preset maximum temperature standard value within a preset month time, and replace a component of the target detected part.
In some examples of the present application, a first preset voltage warning level DI, a second preset voltage warning level D2, a third preset voltage warning level D3, a fourth preset voltage warning level D4 and a fifth preset voltage warning level DS are set in the data processing unit, where D1 > D2 > D3 > D4 > D5; a first preset history voltage L1, a second preset history voltage L2, a third preset history voltage L3 and a fourth preset history voltage LA are set in the data processing unit, where L1 >
L2 > L3 > LA; and the data processing unit is further configured to set a voltage warning level according to a relationship between the voltage information VO and each of preset history voltages when a warning occurs: when VO > L1, a voltage warning level of the target detected part when the warning occurs is set as the first preset voltage warning level D1; 0504986 when L1 > VO > L2, a voltage warning level of the target detected part when the warning occurs 1s set as the second preset voltage warning level D2; when L2 > VO > L3, a voltage warning level of the target detected part when the warning occurs is set as the third preset voltage warning level D3; when L3 > VO > LA, a voltage warning level of the target detected part when the warning occurs 1s set as the fourth preset voltage warning level D4; and when V4 > LO, a voltage warning level of the target detected part when the warning occurs is set as the fifth preset voltage warning level DS.
In some examples of the present application, the data processing unit is further configured to, when the warning occurs, record the voltage information VO of the detection device itself where the warning occurs, and calculate and determine a monthly average warning voltage value
V of the detection device itself based on the voltage information VO, a first preset voltage difference value al, a second preset voltage difference value a2, a third preset voltage difference value a3 and a fourth preset voltage difference value a4 are set in the data processing unit, where al <a2 < a3 < a4, the data processing unit is further configured to determine the monthly average warning voltage value V of the detection device itself, and after an i preset voltage warning level Di is determined as a history voltage level Di corresponding to V according to a relationship between
V and each of the preset history voltages, 1 = 1, 2, 3, 4 and 5, a fault prediction level is determined according to a relationship between a difference value a0 between the voltage information VO and V and each of the preset voltage difference values; when VO-V < al, the voltage warning level Di is set as the fault prediction level; when al < VO-V < a2, the voltage warning level Di after being upgraded by one level is set as the fault prediction level, and if 1 = 1 at this moment, the first preset voltage warning level D1 is directly set as the fault prediction level; when a2 < La-LO01 < a3, the voltage warning level Di after being upgraded by two levels is set as the fault prediction level, and if 1 = 1 at this moment, the first preset voltage warning level
D1 is directly set as the fault prediction level, when a3 < La-LO01 < a4, the voltage warning level Di after being upgraded by three levels is set as the fault prediction level, and if i = 1 at this moment, the first preset voltage warning level 20984
D1 is directly set as the fault prediction level; and when a4 < La-LO1, the first preset voltage warning level D1 is set as the fault prediction level.
The present invention provides a fault detection method and device for a high-voltage power distribution system of a power plant. Compared with the prior art, the beneficial effects are as follows.
According to the present invention, a wireless temperature sensor is configured to detect high-temperature components in a high-voltage power distribution system, such as a high-voltage switch, a bus connector, and an outdoor switch, which has high reliability and safety.
Historical data for the maintenance of a high-voltage device is provided by collecting temperature information and voltage information in real time and recording real-time operating temperature data of the high-voltage device, to realize thermal fault prediction and maintenance of the high-voltage device. According to the present invention, the sensor completely adopts a mode of induction power take-off, and utilizes the inductive power generated when the bus operates to collect and transmit a temperature signal, without other energy sources, and is energy-saving and environmentally friendly. At the same time, by a wireless mode, the mounting of a large number of cables and a related device can be omitted, which greatly saves the use of electrical materials.
FIG. 1 is a flow chart of a fault detection method for a high-voltage power distribution system of a power plant according to the present invention; and
FIG. 2 is a block diagram of a fault detection device for a high-voltage power distribution system of a power plant according to the present invention.
In the following, the specific implementations of the present invention will be described in further detail with reference to the attached drawings and examples. The following examples are used to illustrate the present invention, but are not used to limit the scope of the present invention.
In the description of the present application, it is to be understand that an azimuth or positional relationship indicated by terms "center", "upper", "lower", "front", "back", efi 204984 "right", "vertical", "horizontal", “top", "bottom", "inner" and "outer" is based on the azimuth or positional relationship shown in the attached drawings, which is only to facilitate the description of the present application and simplify the description, and does not indicate or imply that the referred apparatus or element must have a specific direction, be constructed and operated in a specific orientation. Therefore, it is not to be understood as a limitation of the present application.
The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature limited as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.
In the description of the present application, it is to be noted that, unless otherwise specified and limited, the terms "mount", "link", and "connect" are to be understood in a broad sense, for example, which may be fixedly connected, detachably connected, or integrally connected, mechanically connected, or electrically connected, directly connected or indirectly connected through an intermediate medium, or an internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.
In the prior art, the traditional fault detection modes of a high-voltage power distribution system are all based on fault diagnosis detections after fault occur, and cannot pre-warn in advance before the faults occur. In addition, the detection of the high-voltage power distribution system relies on a form of manpower; since temperature monitoring points of a high-voltage electrical device are all in the environment of high voltage, large current and strong magnetic field, and even some monitoring points are still in a closed space, it is dangerous for workers to enter the site for detection. It is an urgent technical problem for those skilled in the art to provide a fault detection method and device for a high-voltage power distribution system of a power plant.
Therefore, the present invention provides a fault detection method and device for a high-voltage power distribution system of a power plant. According to the present invention, a wireless temperature sensor is directly mounted to each high-voltage switch, bus connector 904984 outdoor switch, transformer and other electrical contacts which are prone to generate high temperature. Historical data for the maintenance of a high-voltage device is provided by recording real-time operating temperature data of the high-voltage device and a voltage of a wireless temperature sensor itself via a terminal host, to realize the function of thermal fault prediction and maintenance of the high-voltage device.
Referring to FIG. 1, a disclosed example of the present invention provides a fault detection method for a high-voltage power distribution system of a power plant, including: detecting parameter information about a target detected part of each station in the high-voltage power distribution system of the power plant in real time, where the target detected part includes an upper contact, a lower contact, a busbar and a cable, and the parameter information includes temperature information TO about the target detected part and voltage information VO about a detection device itself: determining a warning level based on the parameter information and preset warning level information about the target detected part, where the preset warning level information is divided from high to low into: first level warning information, second level warning information and third level warning information, when TO < -10°C or TO > 60°C, a warning level of the target detected part is set as the first level warning information, when-10°C < TO < 10°C or 60°C > TO > 40°C, a warning level of the target detected part is set as the second level warning information, when 10°C < TO < 40, a warning level of the target detected part is set as the third level warning information, and when TO < -20°C or TO > 90°C, the target detected part is alarmed; and displaying the number of current pre-warning and alarm in real time when a warning or alarm occurs in the high-voltage power distribution system of the power plant, and displaying an alarmed target detected part in real time.
In a particular example of the present application, the method further includes: determining a pre-warning level based on the parameter information and preset voltage warning information, where when 2700 mV > VO > 2500 mV, the target detected part is warned, and 0506984 when VO > 2700 mV, the target detected part 1s alarmed; and recording the voltage information VO of the detection device itself when a warning occurs in the target detected part.
In a particular example of the present application, the when a warning occurs in the high-voltage power distribution system of the power plant further includes: recording the temperature information TO of the target detected part where the warning occurs, determining a monthly maximum temperature of the target detected part based on the temperature information TO, and generating a maximum temperature histogram of the target detected part; and determining that the target detected part has a fault when a maximum temperature of the target detected part in the histogram is continuously higher than a preset maximum temperature standard value within a preset month time, and replacing a component of the target detected part.
In a particular example of the present application, a first preset voltage warning level D1, a second preset voltage warning level D2, a third preset voltage warning level D3, a fourth preset voltage warning level D4 and a fifth preset voltage warning level DS are preset, where D1 > D2 >
D3 > D4 > D5; a first preset history voltage L1, a second preset history voltage L2, a third preset history voltage L3 and a fourth preset history voltage LA are preset, where L1> L2> L3> LA; and when a warning occurs, a voltage warning level is set according to a relationship between the voltage information VO and each of preset history voltages: when VO > L1, a voltage warning level of the target detected part when the warning occurs is set as the first preset voltage warning level D1; when L1 > VO > L2, a voltage warning level of the target detected part when the warning occurs 1s set as the second preset voltage warning level D2; when L2 > VO > L3, a voltage warning level of the target detected part when the warning occurs 1s set as the third preset voltage warning level D3; when L3 > VO > LA, a voltage warning level of the target detected part when the warning occurs 1s set as the fourth preset voltage warning level D4; and when V4 > LO, a voltage warning level of the target detected part when the warning occurs is set as the fifth preset voltage warning level DS. 0506984
As can be appreciated, the higher the voltage warning level, i.e. the higher the voltage of the target detected part, the more likely the critical upper limit will be reached, and the more likely the target detected part will occur faults.
In a particular example of the present application, when the warning occurs, the voltage information VO of the detection device itself where the warning occurs is recorded, and a monthly average warning voltage value V of the detection device itself is calculated and determined based on the voltage information VO; a first preset voltage difference value al, a second preset voltage difference value a2, a third preset voltage difference value a3 and a fourth preset voltage difference value a4 are set, where al <a2 <a3 <a4; the monthly average warning voltage value V of the detection device itself is determined, and after an i preset voltage warning level Di is determined as a history voltage level Di corresponding to V according to a relationship between V and each of the preset history voltages, 1= 1, 2, 3, 4 and 5, a fault prediction level is determined according to a relationship between a difference value a0 between the voltage information VO and V and each of the preset voltage difference values; when VO-V < al, the voltage warning level Di is set as the fault prediction level; when al < VO-V < a2, the voltage warning level Di after being upgraded by one level is set as the fault prediction level, and if 1 = 1 at this moment, the first preset voltage warning level D1 is directly set as the fault prediction level, when a2 <La-L01 < a3, the voltage warning level Di after being upgraded by two levels is set as the fault prediction level, and if i = 1 at this moment, the first preset voltage warning level
D1 is directly set as the fault prediction level; when a3 < La-LO01 < a4, the voltage warning level Di after being upgraded by three levels is set as the fault prediction level, and if i = 1 at this moment, the first preset voltage warning level
D1 is directly set as the fault prediction level; and when a4 < La-LO1, the first preset voltage warning level D1 is set as the fault prediction level.
As can be appreciated, the fault level is further determined based on the voltage warning level, the higher the fault level, the greater the probability of a fault event occurring at the target 504984 detected part.
Based on the same technical concept, referring to FIG. 2, the present invention further correspondingly provides a fault detection device for a high-voltage power distribution system of a power plant, including: a wireless temperature sensor, configured to detect parameter information about a target detected part of each station in the high-voltage power distribution system of the power plant in real time, where the target detected part includes an upper contact, a lower contact, a busbar and a cable, and the parameter information includes temperature information TO about the target detected part and voltage information VO about the wireless temperature sensor; a data processing unit, configured to determine a warning level based on the parameter information and preset warning level information about the target detected part, where the preset warning level information is divided from high to low into: first level warning information, second level warning information and third level warning information, when TO < -10°C or TO > 60°C, a warning level of the target detected part is set as the first level warning information, when-10°C < TO < 10°C or 60°C > TO > 40°C, a warning level of the target detected part is set as the second level warning information, when 10°C < TO < 40, a warning level of the target detected part is set as the third level warning information, and when TO < -20°C or TO > 90°C, the target detected part is alarmed; and a terminal host, configured to display the number of current pre-warning and alarm in real time when a warning or alarm occurs in the high-voltage power distribution system of the power plant, and display an alarmed target detected part in real time.
In a particular example of the present application, the data processing unit is further configured to determine a pre-warning level based on the parameter information and preset voltage warning information, where when 2700 mV > VO > 2500 mV, the target detected part is warned, and when VO > 2700 mV, the target detected part is alarmed; and record the voltage information VO of the detection device itself when a warning occurs in the target detected part. 17504984
In a particular example of the present application, the data processing unit is further configured to, when the warning occurs, record the temperature information TO of the target detected part where the warning occurs, determine a monthly maximum temperature of the target detected part based on the temperature information TO, and generate a maximum temperature histogram of the target detected part; and determine that the target detected part has a fault when a maximum temperature of the target detected part in the histogram is continuously higher than a preset maximum temperature standard value within a preset month time, and replace a component of the target detected part.
In a particular example of the present application, a first preset voltage warning level DI, a second preset voltage warning level D2, a third preset voltage warning level D3, a fourth preset voltage warning level D4 and a fifth preset voltage warning level D5 are set in the data processing unit, where D1 > D2 > D3 > D4 > D5; a first preset history voltage L1, a second preset history voltage L2, a third preset history voltage L3 and a fourth preset history voltage LA are set in the data processing unit, where L1 >
L2>1L3>L4; and the data processing unit is further configured to set a voltage warning level according to a relationship between the voltage information VO and each of preset history voltages when a warning occurs: when VO > L1, a voltage warning level of the target detected part when the warning occurs is set as the first preset voltage warning level D1; when L1 > VO > L2, a voltage warning level of the target detected part when the warning occurs is set as the second preset voltage warning level D2; when L2 > VO > L3, a voltage warning level of the target detected part when the warning occurs is set as the third preset voltage warning level D3; when L3 > VO > LA, a voltage warning level of the target detected part when the warning occurs is set as the fourth preset voltage warning level D4; and when V4 > LO, a voltage warning level of the target detected part when the warning occurs is set as the fifth preset voltage warning level DS.
As can be appreciated, the higher the voltage warning level, i.e. the higher the voltage of the target detected part, the more likely the critical upper limit will be reached, and the more likely 504984 the target detected part will occur faults.
In a particular example of the present application, the data processing unit is further configured to, when the warning occurs, record the voltage information VO of the detection device itself where the warning occurs, and calculate and determine a monthly average warning voltage value V of the detection device itself based on the voltage information VO; a first preset voltage difference value al, a second preset voltage difference value a2, a third preset voltage difference value a3 and a fourth preset voltage difference value a4 are set in the data processing unit, where al <a2 < a3 < a4, the data processing unit is further configured to determine the monthly average warning voltage value V of the detection device itself, and after an i preset voltage warning level Di is determined as a history voltage level Di corresponding to V according to a relationship between
V and each of the preset history voltages, 1 = 1, 2, 3, 4 and 5, a fault prediction level is determined according to a relationship between a difference value a0 between the voltage information VO and V and each of the preset voltage difference values; when VO-V < al, the voltage warning level Di is set as the fault prediction level; when al < VO-V < a2, the voltage warning level Di after being upgraded by one level is set as the fault prediction level, and if 1 = 1 at this moment, the first preset voltage warning level D1 is directly set as the fault prediction level, when a2 <La-L01 < a3, the voltage warning level Di after being upgraded by two levels is set as the fault prediction level, and if i = 1 at this moment, the first preset voltage warning level
D1 is directly set as the fault prediction level, when a3 <La-L01 < a4, the voltage warning level Di after being upgraded by three levels is set as the fault prediction level, and if i = 1 at this moment, the first preset voltage warning level
DI is directly set as the fault prediction level; and when a4 < La-LO1, the first preset voltage warning level D1 is set as the fault prediction level.
As can be appreciated, the fault level is further determined based on the voltage warning level, the higher the fault level, the greater the probability of a fault event occurring at the target detected part.
According to the first technical concept of the present invention, in the present invention, à 504984 warning level is determined based on relevant parameters by real-time detection of the temperature of the target detected part of each station in the high-voltage power distribution system of the power plant and the voltage of the detection device itself. Since a high-voltage switch, a bus connector and a transformer easily become high temperature, the operation state can be determined in advance by directly detecting the temperature, and then the fault detection can be determined. Historical data for the maintenance of a high-voltage device is provided by real-time operating temperature data of the high-voltage device to realize thermal fault prediction and maintenance of the high-voltage device.
According to the second technical concept of the present invention, in the present invention, a wireless temperature sensor is added, which adopts radio waves for signal transmission and is mounted on the high-voltage device and in wireless connection to a receiving device, induced electricity of an electrical device providing power source, which greatly improves the use experience of a temperature sensor, eliminates the trouble of replacing shutdown busbar with traditional batteries, and improves the use convenience of sensor.
A wireless temperature sensor has high reliability and safety, can be directly mounted to each high-voltage switch, bus connector, outdoor switch, transformer and other electrical contacts which are prone to generate high temperature. The wireless temperature sensor adopts a
PN junction semiconductor as a sensor of a temperature measuring element, the semiconductor element is not easy to aging, with long service life and high reliability. In summary, according to the present invention, historical data for the maintenance of a high-voltage device is provided by collecting temperature information and voltage information in real time and recording real-time operating temperature data of the high-voltage device, to realize thermal fault prediction and maintenance of the high-voltage device.
The above is only an example of the present invention, but it not be used to limit the scope of the present invention. Any structural changes made according to the present invention, as long as the essence of the present invention is not lost, is regarded as falling within the scope of protection of the present invention.
It can be clearly understood by those skilled in the art that for the convenience and conciseness of description, the specific working process of the system described above and related explanations can refer to the corresponding process in the above method example, and 504984 will not be described in detail here.
It is to be noted that the system provided in the above examples is only exemplified by the division of the above functional modules, and in practical applications, the above function allocation can be completed by different functional modules according to needs, i.e. the modules or steps in the examples of the present invention are re-decomposed or recombined, for example, the modules in the above examples can be combined into one module or further divided into a plurality of sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the examples of the present invention are only used to distinguish each module or step, and are not regarded as improper limitations on the present invention.
Those skilled in the art will appreciate that various exemplary modules, method steps, described in connection with the examples disclosed herein can be implemented as an electronic hardware, a computer software, or a combination of both, and that corresponding programs of software modules and method steps can be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. To clearly illustrate this interchangeability of electronic hardware and software, the composition and steps of each example have been described generally in terms of functions in the above description. Whether such functions are implemented by an electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation is not considered beyond the scope of the present invention.
The terms "include" or any other similar terms are intended to cover a non-exclusive inclusion, so that a process, method, article or device/apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such processes, methods, articles or devices/apparatuses.
So far, the technical solutions of the present invention have been described with reference to the preferred examples shown in the attached drawings. However, it will be easily understood by those skilled in the art that the protection scope of the present invention is obviously not limited 504984 to these specific examples. Under the premise of not deviating from the principle of the present invention, equivalent changes or substitutions of relevant technical features can be made by those skilled in the art, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
The above is only the preferred example of the present invention, and is not used to limit the protection scope of the present invention.
Claims (10)
1. À fault detection method for a high-voltage power distribution system of a power plant, comprising: detecting parameter information about a target detected part of each station in the high-voltage power distribution system of the power plant in real time, wherein the target detected part comprises an upper contact, a lower contact, a busbar and a cable, and the parameter information comprises temperature information TO about the target detected part and voltage information VO about a detection device itself, determining a warning level based on the parameter information and preset warning level information about the target detected part, wherein the preset warning level information is divided from high to low into: first level warning information, second level warning information and third level warning information, when TO < -10°C or TO > 60°C, a warning level of the target detected part is set as the first level warning information, when-10°C < TO < 10°C or 60°C > TO > 40°C, a warning level of the target detected part is set as the second level warning information, when 10°C < TO < 40, a warning level of the target detected part is set as the third level warning information, and when TO < -20°C or TO > 90°C, the target detected part is alarmed; and displaying the number of current pre-warning and alarm in real time when a warning or alarm occurs in the high-voltage power distribution system of the power plant, and displaying an alarmed target detected part in real time.
2. The fault detection method for a high-voltage power distribution system of a power plant according to claim 1, further comprising: determining a pre-warning level based on the parameter information and preset voltage warning information, wherein when 2700 mV > VO > 2500 mV, the target detected part is warned, and when VO > 2700 mV, the target detected part 1s alarmed; and recording the voltage information VO of the detection device itself when a warning occurs in the target detected part.
3. The fault detection method for a high-voltage power distribution system of a power plant 904984 according to claim 1, wherein the when a warning occurs in the high-voltage power distribution system of the power plant further comprises: recording the temperature information TO of the target detected part where the warning occurs, determining a monthly maximum temperature of the target detected part based on the temperature information TO, and generating a maximum temperature histogram of the target detected part; and determining that the target detected part has a fault when a maximum temperature of the target detected part in the histogram is continuously higher than a preset maximum temperature standard value within a preset month time, and replacing a component of the target detected part.
4. The fault detection method for a high-voltage power distribution system of a power plant according to claim 2, wherein a first preset voltage warning level D1, a second preset voltage warning level D2, a third preset voltage warning level D3, a fourth preset voltage warning level D4 and a fifth preset voltage warning level DS are preset, wherein D1 > D2 > D3 > D4 > DS; a first preset history voltage L1, a second preset history voltage L2, a third preset history voltage L3 and a fourth preset history voltage L4 are preset, wherein L1> L2> L3> LA; and when a warning occurs, a voltage warning level is set according to a relationship between the voltage information VO and each of preset history voltages: when VO > L1, a voltage warning level of the target detected part when the warning occurs is set as the first preset voltage warning level D1; when L1 > VO > L2, a voltage warning level of the target detected part when the warning occurs is set as the second preset voltage warning level D2; when L2 > VO > L3, a voltage warning level of the target detected part when the warning occurs is set as the third preset voltage warning level D3; when L3 > VO > LA, a voltage warning level of the target detected part when the warning occurs is set as the fourth preset voltage warning level D4; and when V4 > LO, a voltage warning level of the target detected part when the warning occurs is set as the fifth preset voltage warning level DS.
5. The fault detection method for a high-voltage power distribution system of a power plant according to claim 4, wherein 0506984 when the warning occurs, the voltage information VO of the detection device itself where the warning occurs is recorded, and a monthly average warning voltage value V of the detection device itself is calculated and determined based on the voltage information VO; a first preset voltage difference value al, a second preset voltage difference value a2, a third preset voltage difference value a3 and a fourth preset voltage difference value a4 are set, wherein al <a2 <a3 <a4; the monthly average warning voltage value V of the detection device itself is determined, and after an i preset voltage warning level Di is determined as a history voltage level Di corresponding to V according to a relationship between V and each of the preset history voltages, i = 1, 2, 3, 4 and 5, a fault prediction level is determined according to a relationship between a difference value a0 between the voltage information VO and V and each of the preset voltage difference values; when VO - V <al, the voltage warning level Di is set as the fault prediction level; when al < VO - V < a2, the voltage warning level Di after being upgraded by one level is set as the fault prediction level, and if 1 = 1 at this moment, the first preset voltage warning level D1 is directly set as the fault prediction level; when a2 < La - L01 < a3, the voltage warning level Di after being upgraded by two levels is set as the fault prediction level, and if i = 1 at this moment, the first preset voltage warning level DI is directly set as the fault prediction level; when a3 < La - LO1 < a4, the voltage warning level Di after being upgraded by three levels is set as the fault prediction level, and if i = 1 at this moment, the first preset voltage warning level D1 is directly set as the fault prediction level; and when a4 < La - LO1, the first preset voltage warning level D1 is set as the fault prediction level.
6. À fault detection device for a high-voltage power distribution system of a power plant, comprising: a wireless temperature sensor, configured to detect parameter information about a target detected part of each station in the high-voltage power distribution system of the power plant in real time, wherein the target detected part comprises an upper contact, a lower contact, a busbar and a cable, and the parameter information comprises temperature information TO about the 504984 target detected part and voltage information VO about the wireless temperature sensor; a data processing unit, configured to determine a warning level based on the parameter information and preset warning level information about the target detected part, wherein the preset warning level information is divided from high to low into: first level warning information, second level warning information and third level warning information, when TO < -10°C or TO > 60°C, a warning level of the target detected part is set as the first level warning information, when-10°C < TO < 10°C or 60°C > TO > 40°C, a warning level of the target detected part is set as the second level warning information, when 10°C < TO < 40, a warning level of the target detected part is set as the third level warning information, and when TO < -20°C or TO > 90°C, the target detected part is alarmed; and a terminal host, configured to display the number of current pre-warning and alarm in real time when a warning or alarm occurs in the high-voltage power distribution system of the power plant, and display an alarmed target detected part in real time.
7. The fault detection device for a high-voltage power distribution system of a power plant according to claim 6, wherein the data processing unit is further configured to determine a pre-warning level based on the parameter information and preset voltage warning information, wherein, when 2700 mV > VO > 2500 mV, the target detected part is warned, and when VO > 2700 mV, the target detected part is alarmed; and record the voltage information VO of the detection device itself when a warning occurs in the target detected part.
8. The fault detection device for a high-voltage power distribution system of a power plant according to claim 6, wherein the data processing unit is further configured to record the temperature information TO of the target detected part where the warning occurs, determine a monthly maximum temperature of the target detected part based on the temperature information TO, and generate a maximum temperature histogram of the target detected part; and determine that the target detected part has a fault when a maximum temperature of the target 504984 detected part in the histogram is continuously higher than a preset maximum temperature standard value within a preset month time, and replace a component of the target detected part.
9. The fault detection device for a high-voltage power distribution system of a power plant according to claim 7, wherein a first preset voltage warning level D1, a second preset voltage warning level D2, a third preset voltage warning level D3, a fourth preset voltage warning level D4 and a fifth preset voltage warning level DS are set in the data processing unit, wherein D1 > D2 > D3 > D4 > DS; a first preset history voltage L1, a second preset history voltage L2, a third preset history voltage L3 and a fourth preset history voltage LA are set in the data processing unit, wherein L1 > L2>1L3>L4; and the data processing unit is further configured to set a voltage warning level according to a relationship between the voltage information VO and each of preset history voltages when a warning occurs: when VO > L1, a voltage warning level of the target detected part when the warning occurs is set as the first preset voltage warning level D1; when L1 > VO > L2, a voltage warning level of the target detected part when the warning occurs is set as the second preset voltage warning level D2; when L2 > VO > L3, a voltage warning level of the target detected part when the warning occurs is set as the third preset voltage warning level D3; when L3 > VO > LA, a voltage warning level of the target detected part when the warning occurs 1s set as the fourth preset voltage warning level D4; and when V4 > LO, a voltage warning level of the target detected part when the warning occurs is set as the fifth preset voltage warning level DS.
10. The fault detection device for a high-voltage power distribution system of a power plant according to claim 9, wherein the data processing unit is further configured to, when the warning occurs, record the voltage information VO of the detection device itself where the warning occurs, and calculate and determine a monthly average warning voltage value V of the detection device itself based on the voltage information VO;
a first preset voltage difference value al, a second preset voltage difference value a2, a third 504984 preset voltage difference value a3 and a fourth preset voltage difference value a4 are set in the data processing unit, wherein al < a2 <a3 < a4; the data processing unit is further configured to determine the monthly average warning voltage value V of the detection device itself, and after an i preset voltage warning level Di is determined as a history voltage level Di corresponding to V according to a relationship between V and each of the preset history voltages, 1 = 1, 2, 3, 4 and 5, a fault prediction level is determined according to a relationship between a difference value a0 between the voltage information VO and V and each of the preset voltage difference values; when VO - V <al, the voltage warning level Di is set as the fault prediction level, when al < VO - V <a2, the voltage warning level Di after being upgraded by one level is set as the fault prediction level, and if 1 = 1 at this moment, the first preset voltage warning level D1 is directly set as the fault prediction level; when a2 < La - L01 < a3, the voltage warning level Di after being upgraded by two levels is set as the fault prediction level, and if i = 1 at this moment, the first preset voltage warning level D1 is directly set as the fault prediction level, when a3 < La - LO1 < a4, the voltage warning level Di after being upgraded by three levels is set as the fault prediction level, and if i = 1 at this moment, the first preset voltage warning level D1 is directly set as the fault prediction level; and when a4 < La - LO1, the first preset voltage warning level D1 is set as the fault prediction level.
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