CN115333062B - Fault processing method and device for power distribution network system - Google Patents
Fault processing method and device for power distribution network system Download PDFInfo
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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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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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
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
Abstract
The invention provides a fault processing method and device for a power distribution network system. The fault processing method of the power distribution network system comprises the following steps: constructing a topological graph of the power distribution network according to the current direction of the power distribution network during operation; acquiring a node temperature value corresponding to each power distribution device in real time, and calculating an abnormal deviation value according to the node temperature value and an abnormal temperature threshold value; judging whether the power distribution equipment corresponding to the node temperature value is abnormal or not according to the magnitude relation between the abnormal deviation value and the deviation threshold value; if the abnormal power distribution equipment is abnormal, calculating the node importance degree of the corresponding node of the abnormal power distribution equipment; and calculating the fault level according to the abnormal deviation value and the node importance degree, generating an early warning signal and sending the early warning signal to the power distribution maintenance station.
Description
Technical Field
The invention relates to the technical field of power distribution networks, in particular to a fault processing method and device of a power distribution network system.
Background
The distribution network is an electric power network which receives electric energy from a transmission network or a regional power plant and distributes the electric energy to various users on site through distribution facilities or step by step according to voltage. The power distribution network consists of overhead lines, cables, towers, distribution transformers, isolating switches, reactive power compensators, accessory facilities and the like, and plays a role in distributing electric energy in a power network.
However, the network structure of the power distribution network is complex, and when the distribution line is damaged and has sudden conditions such as faults, operation and maintenance personnel often cannot find the distribution line in time and usually rush repair the distribution line after power failure occurs, so that the operation reliability of the current power distribution network is low, and the normal life and industrial production process of a power utilization terminal are influenced by power failure in a peak period of power utilization.
Disclosure of Invention
In order to solve the problems, the invention provides a fault processing method of a power distribution network system. The fault processing method of the power distribution network system comprises the following steps: constructing a distribution network topological graph according to the current direction of a distribution network during operation, wherein the starting point of the distribution network topological graph is a power supply device, the end point of the distribution network topological graph is a power utilization terminal, and the nodes of the distribution network topological graph are power distribution devices; at least one of the power distribution devices is disposed between the power supply device and the consumer terminal to form a distribution line; each of the power distribution devices has a unique node identification number; acquiring a node temperature value corresponding to each power distribution device in real time, and calculating an abnormal deviation value according to the node temperature value and an abnormal temperature threshold value; judging whether the power distribution equipment corresponding to the node temperature value is abnormal or not according to the size relation between the abnormal deviation value and the deviation threshold value; if the abnormal distribution equipment is abnormal, acquiring the total quantity of the distribution equipment in the distribution line where the abnormal distribution equipment is positioned and the quantity of the distribution equipment between the abnormal distribution equipment and the power supply equipment, and calculating the node importance degree of the corresponding node of the abnormal distribution equipment; calculating a fault level according to the abnormal deviation value and the importance degree of the node; generating an early warning signal according to the fault grade, the fault occurrence time, the node temperature value corresponding to the abnormal power distribution equipment, the node identification number corresponding to the abnormal power distribution equipment, the positioning data corresponding to the abnormal power distribution equipment and the power distribution operation data corresponding to the abnormal power distribution equipment, and sending the early warning signal to a power distribution overhaul station; wherein, K = (T) Node point -T Threshold value ）/T Threshold value ；T Node point Is a node temperature value; t is a unit of Threshold value Is an abnormal temperature threshold; k is an abnormal deviation value; m = (N) 1 -N 2 ) /N 1 (ii) a M is the importance degree of the node; n is a radical of 1 The total number of the distribution equipment in the distribution line where the abnormal distribution equipment is located is determined; n is a radical of hydrogen 2 For distribution between abnormal distribution equipment and said supply equipmentThe number of electrical devices; l = int (12.5K + 0.5M); l is a fault grade; t is Threshold value Is 70 ℃; n is a radical of 1 Has a value range of [1, 10 ]]；N 2 Has a value range of [0, 9]](ii) a L has a value in the range of [1,4 ]]。
The technical effect achieved after the technical scheme is adopted is as follows: the power distribution network topological graph is constructed according to the current direction when the power distribution network operates, each power distribution device is set to have a unique node identification number, a clear power distribution network topological model can be constructed according to the power distribution lines of the power distribution network, and therefore when the power distribution network system is abnormal, which power distribution device has a fault can be rapidly known according to the unique node identification number. Through the node temperature value that every distribution equipment corresponds of real-time acquisition, can calculate unusual offset value according to node temperature value and unusual temperature threshold value, and then can judge whether the distribution equipment that this node temperature of department corresponds appears unusually according to the big or small relation of unusual offset value and offset threshold value to can in time send early warning signal to distribution maintenance station when distribution equipment appears unusually, maintain and troubleshooting. By acquiring the total quantity N of the abnormal distribution equipment in the distribution line 1 And the quantity N of the abnormal distribution equipment between the distribution equipment and the power supply equipment 2 The node importance degree M of the corresponding node of the abnormal power distribution equipment can be calculated. Through considering two factors of abnormal deviation value K and node importance degree M comprehensively, can divide the fault that distribution equipment appears into a plurality of fault classes, through with the fault class, the fault occurrence time, the node temperature value that distribution equipment that appears unusually corresponds, the node identification number that distribution equipment that appears unusually corresponds, distribution equipment that appears unusually corresponds the locating data, and distribution operation data that distribution equipment that appears unusually corresponds generate early warning signal, distribution maintenance station can judge the emergency degree of maintenance and troubleshooting according to the fault class, confirm which distribution equipment has appeared unusually trouble according to node identification number, can distribute the maintenance personal that the distance is nearest to distribution equipment that appears unusually according to the locating data and go forward to overhaul, distribution operation data that distribution equipment that appears unusually corresponds through appearing, distribution maintenance station can be convenient for divide into a plurality of fault classesAnd analyzing the reasons of the abnormal faults and improving the fault processing efficiency.
In this technical solution, the deviation threshold includes a first deviation threshold, and the determining, according to a magnitude relationship between the abnormal deviation value and the deviation threshold, whether the power distribution equipment corresponding to the node temperature value is abnormal includes: if the abnormal deviation value is larger than a first deviation threshold value, judging that the power distribution equipment corresponding to the node temperature value is abnormal; wherein, the value range of the first deviation threshold is [0,0.09].
The technical effect achieved after the technical scheme is adopted is as follows: if the abnormal deviation value is larger than the first deviation threshold value, the node temperature is deviated from the node temperature fluctuation range of the normal operation of the power distribution equipment, namely the power distribution equipment corresponding to the node temperature is abnormal, so that the importance degree of the corresponding node is further calculated, and the abnormal grade is determined according to the importance degree of the node and the abnormal deviation value.
In this technical solution, the deviation threshold further includes a second deviation threshold, and the second deviation threshold is greater than the first deviation threshold; if the abnormal deviation value is larger than a second deviation threshold value, judging that L =4; wherein, the value range of the second deviation threshold is [0.29,0.43].
The technical effect achieved after the technical scheme is adopted is as follows: by setting the second deviation threshold larger than the first deviation threshold, if the abnormal deviation value is larger than the second deviation threshold, the abnormal deviation threshold is very high, namely, at the moment, the fuse of the power distribution equipment corresponding to the abnormal deviation value has power-off protection and stops running, so that the fault level is directly judged to be the fourth level of the highest fault level, the node importance degree is not calculated, and an abnormal early warning signal is directly sent to the power distribution overhaul station.
In this technical solution, the method for processing a fault in a power distribution network system further includes: if the acquired node temperature value is a null value, generating a sensor fault signal according to the node identification number and the positioning data of the power distribution equipment corresponding to the null value, and sending the sensor fault signal to a power distribution overhaul station; acquiring that the power distribution equipment corresponding to the null value is close to the power utilization terminalCalculating a first abnormal deviation value according to a node temperature value of first power distribution equipment which is arranged on one side of the terminal and is directly connected with the power distribution equipment corresponding to the null value, and judging whether the power distribution equipment corresponding to the null value is abnormal or not according to the magnitude relation between the first abnormal deviation value and the deviation threshold value; wherein, K 1 =（T Node 1 -T Threshold value ）/T Threshold value ，T Node 1 The node temperature value is the node temperature value of first power distribution equipment which is positioned at one side of the power distribution equipment corresponding to the null value, is close to the power utilization terminal and is directly connected with the power distribution equipment corresponding to the null value; k 1 Is the first anomalous deviation value.
The technical effect achieved after the technical scheme is adopted is as follows: if the acquired node temperature value is a null value, the fact that the temperature sensor at the power distribution equipment corresponding to the null value has a fault is indicated, so that a sensor fault signal is generated according to the node identification number and the positioning data of the power distribution equipment corresponding to the null value, and is sent to a power distribution maintenance station, and the temperature sensor is replaced in time. During the sensor fault period, the node temperature value T of the first power distribution equipment which is positioned at one side of the power distribution equipment corresponding to the null value, close to the power utilization terminal and is directly connected with the power distribution equipment corresponding to the null value is obtained Node 1 Can be based on the node temperature value T of the first power distribution equipment Node 1 Calculating a corresponding first abnormal deviation value K 1 And judging whether the power distribution equipment corresponding to the null value is abnormal or not according to the magnitude relation between the first abnormal deviation value and the deviation threshold value.
In this technical solution, the method for processing a fault in a power distribution network system further includes: collecting power distribution operation data corresponding to each power distribution device every other preset time length and recording the power distribution operation data to a power distribution network memory; the power distribution operation data corresponding to the abnormal power distribution equipment comprises the following data: the latest power distribution operation data corresponding to the abnormal power distribution equipment and the i continuous power distribution operation data before the abnormality occurs.
The technical effect achieved after the technical scheme is adopted is as follows: the power distribution operation data corresponding to each power distribution device are collected once every preset time interval and recorded to a power distribution network memory, and early warning signals are generated according to the latest power distribution operation data corresponding to the abnormal power distribution devices and the i pieces of continuous power distribution operation data before the abnormality occurs.
In the present embodiment, i is 24.
In this technical solution, the method for processing a fault in a power distribution network system further includes: the power distribution overhaul station continuously receives and stores the early warning signal; and when the residual capacity of a storage of the power distribution overhaul station is not enough to store the early warning signals, deleting the early warning signals with the lowest fault grade to store the latest early warning signals.
The technical effect achieved after the technical scheme is adopted is as follows: through setting up the distribution maintenance station and continuously receiving and storing this early warning signal, when can receive the early warning signal, transfer historical trouble early warning signal and assist and carry out abnormal fault analysis. Because the capacity of the memory of the power distribution overhaul station is limited, when the residual capacity of the memory of the power distribution overhaul station is not enough to store the latest early warning signal, the reference meaning is the minimum, namely the historical fault early warning signal with the lowest fault level, needs to be deleted to vacate a storage space for storing the latest early warning signal.
In this technical solution, the method for processing a fault in a power distribution network system further includes: if a plurality of early warning signals with the lowest fault grade exist in parallel, the early warning signal with the earliest fault occurrence time is selected and deleted.
The technical effect achieved after the technical scheme is adopted is as follows: if a plurality of early warning signals with the lowest fault level exist in parallel, the early warning signal with the earliest fault occurrence time is selected and deleted, so that the fact that the historical fault early warning information stored in the memory of the power distribution overhaul station is the latest and has the highest reference value is ensured.
The present technical solution provides a fault handling device for a power distribution network system, where the fault handling device for the power distribution network system executes a fault handling method for the power distribution network system according to any one of the previous technical solutions.
This technical scheme provides a fault handling device of distribution network system, the fault handling device of distribution network system includes: a processor, a memory, and a program or instructions stored on the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the method for handling faults in a power distribution network system according to any one of the preceding claims.
In summary, the above embodiments of the present application may have one or more of the following advantages or beneficial effects:
(1) By acquiring the node temperature value corresponding to each distribution equipment in real time, the abnormal deviation value can be calculated according to the node temperature value and the abnormal temperature threshold value, and whether the distribution equipment corresponding to the node temperature is abnormal or not can be judged according to the size relation between the abnormal deviation value and the deviation threshold value, so that an early warning signal can be timely sent to a distribution maintenance station when the distribution equipment is abnormal, and maintenance and troubleshooting can be performed. By acquiring the total quantity N of the abnormal distribution equipment in the distribution line 1 And the number N of abnormal power distribution equipment between the power distribution equipment and the power supply equipment 2 And the node importance degree M of the corresponding node of the abnormal power distribution equipment can be calculated.
(2) Through considering two factors of abnormal deviation value K and node importance degree M synthetically, can divide into a plurality of fault classes with the trouble that distribution equipment appears, through with the fault class, the fault occurrence time, the node temperature value that distribution equipment that appears unusually corresponds, the node identification number that distribution equipment that appears unusually corresponds, distribution equipment that appears unusually corresponds the locating data, and distribution operation data that distribution equipment that appears unusually corresponds generate early warning signal, distribution maintenance station can judge the emergency degree of maintenance and troubleshooting according to the fault class, confirm which distribution equipment has appeared the abnormal fault according to the node identification number, can distribute the maintenance personal that the distance is nearest to distribution equipment that appears unusually to go forward to overhaul according to the locating data, distribution operation data through distribution equipment that distribution maintenance station that appears unusually corresponds, can be convenient for distribution maintenance station analysis abnormal fault's reason, improve fault handling efficiency.
(3) By setting the second deviation threshold larger than the first deviation threshold, if the abnormal deviation value is larger than the second deviation threshold, the abnormal deviation threshold is very high, namely, at the moment, the fuse of the power distribution equipment corresponding to the abnormal deviation value has power-off protection and stops running, so that the fault level is directly judged to be the fourth level of the highest fault level, the node importance degree is not calculated, and an abnormal early warning signal is directly sent to the power distribution overhaul station.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;
fig. 1 is a schematic flowchart of a fault handling method for a power distribution network system according to a first embodiment of the present invention;
FIG. 2 is a detailed flow diagram of a method for fault handling in the power distribution grid system of FIG. 1;
fig. 3 is a block schematic diagram of a fault handling device of the power distribution grid system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
[ first embodiment ] A method for manufacturing a semiconductor device
Fig. 1 is a schematic flowchart of a fault handling method for a power distribution network system according to a first embodiment of the present invention. With reference to fig. 1 and 2, the fault handling method of the power distribution network system includes the following steps:
step S10: constructing a distribution network topological graph according to the current direction of a distribution network during operation, wherein the starting point of the distribution network topological graph is a power supply device, the end point of the distribution network topological graph is a power utilization terminal, and the nodes of the distribution network topological graph are power distribution devices; at least one power distribution device is arranged between the power supply device and the electric terminal to form a distribution line; each power distribution device has a unique node identification number;
step S20: acquiring a node temperature value corresponding to each power distribution device in real time and obtaining a node temperature value T according to the node temperature value Node point And an abnormal temperature threshold T Threshold value Calculating an abnormal deviation value K = (T) Node point -T Threshold value ）/T Threshold value ；
Step S30: judging whether the power distribution equipment corresponding to the node temperature value is abnormal or not according to the magnitude relation between the abnormal deviation value and the deviation threshold value;
step S40: if the abnormal distribution equipment occurs, acquiring the total quantity N of the distribution equipment in the distribution line where the abnormal distribution equipment occurs 1 And the number N of abnormal power distribution equipment between the power distribution equipment and the power supply equipment 2 And calculating the node importance degree M = (N) of the corresponding node of the abnormal power distribution equipment 1 -N 2 ) /N 1 ；
Step S50: calculating a fault level L = int (12.5 × K + 0.5M) according to the abnormal deviation value K and the node importance degree M;
step S60: generating an early warning signal according to the fault grade, the fault occurrence time, the node temperature value corresponding to the abnormal power distribution equipment, the node identification number corresponding to the abnormal power distribution equipment, the positioning data corresponding to the abnormal power distribution equipment and the power distribution operation data corresponding to the abnormal power distribution equipment, and sending the early warning signal to a power distribution overhaul station;
wherein, T Threshold value Is 70 ℃; n is a radical of 1 Has a value range of [1, 10 ]]；N 2 Has a value range of [0, 9]](ii) a L has a value in the range of [1,4 ]]。
For example, the total number N of distribution devices in the distribution line where the abnormal distribution device is located 1 If =10, thenNumber N of power distribution devices between abnormal power distribution devices and power supply device 2 If =9, it indicates that the abnormal power distribution equipment is the power distribution equipment farthest from the power supply equipment, and the node importance degree M = (N) 1 -N 2 ) /N 1 = (10-9)/10 =0.1. The number N of the abnormal power distribution equipment and the abnormal power supply equipment 2 If the node importance level M = (N), it means that the power distribution device with the abnormality is the power distribution device closest to the power supply device, and at this time, the node importance level M = (N) 1 -N 2 ) /N 1 =(10-0)/10=1.0。
For example, when the node temperature value T Node point At 90 ℃, the abnormal deviation value K = (T) Node point -T Threshold value ）/T Threshold value = 90-70)/70 ≈ 0.29. If node importance M = (N) 1 -N 2 ) /N 1 = 10-0)/10 =1.0, then the fault class L = int (12.5 × k +0.5 m) = int (12.5 × 0.29+0.5 × 1.0) = int (4.125) =4. When node temperature value T Node point An abnormal deviation value K = (T) at 76 DEG C Node point -T Threshold value ）/T Threshold value = 76-70)/70 ≈ 0.09. If node importance M = (N) 1 -N 2 ) /N 1 = 10-9)/10.1, then the fault class L = int (12.5 × k +0.5 m) = int (12.5 × 0.09+0.5 × 0.1) = int (1.175) =1.
In a specific embodiment, a distribution network topological graph is constructed according to the current direction of the distribution network during operation, and each distribution device is set to have a unique node identification number, so that a clear distribution network topological model can be constructed according to the distribution lines of the distribution network, and when the distribution network system is abnormal, which distribution device has a fault can be quickly known according to the unique node identification number. Through the node temperature value that every distribution equipment corresponds of real-time acquisition, can calculate unusual offset value according to node temperature value and unusual temperature threshold value, and then can judge whether the distribution equipment that this node temperature of department corresponds appears unusually according to the big or small relation of unusual offset value and offset threshold value to can in time send early warning signal to distribution maintenance station when distribution equipment appears unusually, maintain and troubleshooting.
By acquiring occurrence of an exceptionThe total quantity N of the distribution equipment in the distribution line where the distribution equipment is positioned 1 And the number N of abnormal power distribution equipment between the power distribution equipment and the power supply equipment 2 And the node importance degree M of the corresponding node of the abnormal power distribution equipment can be calculated. For example, the total number N of the power distribution devices in the distribution line where the abnormal power distribution device is located 1 When the abnormal distribution equipment is the same, the quantity N of the distribution equipment between the abnormal distribution equipment and the abnormal power supply equipment 2 The less the number of power distribution equipment with abnormalities in the distribution line, the more important the node importance level M.
By comprehensively considering two factors of an abnormal deviation value K and a node importance degree M, the fault of the power distribution equipment can be divided into a plurality of fault levels, early warning signals are generated by the fault levels, the fault occurrence time, the node temperature value corresponding to the abnormal power distribution equipment, the node identification number corresponding to the abnormal power distribution equipment, the positioning data corresponding to the abnormal power distribution equipment and the power distribution operation data corresponding to the abnormal power distribution equipment, the power distribution overhaul station can judge the emergency degree of maintenance and fault troubleshooting according to the fault levels, determine which power distribution equipment has an abnormal fault according to the node identification number, distribute maintenance personnel nearest to the abnormal power distribution equipment according to the positioning data, overhaul before, and analyze the reason of the abnormal fault through the power distribution operation data corresponding to the abnormal power distribution equipment, thereby improving the fault processing efficiency.
Further, the deviation threshold includes a first deviation threshold, and determining whether the power distribution equipment corresponding to the node temperature value is abnormal according to a magnitude relationship between the abnormal deviation value and the deviation threshold includes: if the abnormal deviation value is larger than the first deviation threshold value, judging that the power distribution equipment corresponding to the node temperature value is abnormal; wherein, the value range of the first deviation threshold is [0,0.09], and the preferred value of the first deviation threshold is 0.09.
It can be understood that, if the abnormal deviation value is greater than the first deviation threshold value, it indicates that the node temperature deviates from the node temperature fluctuation range in the normal operation of the power distribution equipment, that is, the power distribution equipment corresponding to the node temperature is abnormal, so the corresponding node importance degree is further calculated, and the abnormal level is determined according to the node importance degree and the abnormal deviation value.
For example, if it is detected that the node temperature of a certain power distribution equipment is 80 ℃, the abnormal deviation value K = (80-70)/70 ≈ 0.14 corresponding to the node temperature exceeds the first deviation threshold, and thus it is determined that the power distribution equipment is abnormal.
Further, the deviation threshold value further comprises a second deviation threshold value, and the second deviation threshold value is greater than the first deviation threshold value; if the abnormal deviation value is larger than a second deviation threshold value, judging that the fault level L =4; wherein, the value range of the second deviation threshold is [0.29,0.43], and the preferred value of the second deviation threshold is 0.36.
It can be understood that by setting the second deviation threshold larger than the first deviation threshold, if the abnormal deviation value is larger than the second deviation threshold, it is indicated that the abnormal deviation threshold is very high, that is, at this time, the fuse of the power distribution device corresponding to the abnormal deviation value has been cut off to protect and stop running, so that the fault level is directly judged to be the highest fault level four, the node importance degree is not calculated, and the abnormal early warning signal is directly sent to the power distribution overhaul station.
Further, the fault processing method of the power distribution network system further comprises the following steps: if the acquired node temperature value is a null value, generating a sensor fault signal according to the node identification number and the positioning data of the power distribution equipment corresponding to the null value, and sending the sensor fault signal to a power distribution overhaul station; acquiring a node temperature value T of first power distribution equipment which is positioned on one side, close to the power utilization terminal, of the power distribution equipment corresponding to the null value and is directly connected with the power distribution equipment corresponding to the null value Node 1 Calculating a first abnormal deviation value K 1 =（T Node 1 -T Threshold value ）/T Threshold value And judging whether the power distribution equipment corresponding to the null value is abnormal or not according to the magnitude relation between the first abnormal deviation value and the deviation threshold value.
It can be understood that, if the collected node temperature value is null, it indicates that the temperature sensor at the power distribution equipment corresponding to the null has a fault, so that the power distribution equipment corresponding to the null has a fault according to the nullThe node identification number and the positioning data generate a sensor fault signal, and the sensor fault signal is sent to a power distribution maintenance station, and the temperature sensor is replaced in time. During the sensor fault period, the node temperature value T of the first power distribution equipment which is positioned at one side of the power distribution equipment corresponding to the null value, close to the power utilization terminal and is directly connected with the power distribution equipment corresponding to the null value is obtained Node 1 Can be based on the node temperature value T of the first power distribution equipment Node 1 Calculating a corresponding first abnormal deviation value K 1 And judging whether the power distribution equipment corresponding to the null value is abnormal or not according to the magnitude relation between the first abnormal deviation value and the deviation threshold value.
Further, the fault processing method of the power distribution network system further comprises the following steps: collecting power distribution operation data corresponding to each power distribution device every other preset time length and recording the power distribution operation data to a power distribution network memory; the power distribution operation data corresponding to the abnormal power distribution equipment comprises the following data: the latest power distribution operation data corresponding to the abnormal power distribution equipment and the i continuous power distribution operation data before the abnormality occurs. For example, the preset time is 2 seconds; i takes the value 24.
It can be understood that, the distribution operation data corresponding to each distribution equipment is collected once every preset time interval and recorded to a distribution network memory, and an early warning signal is generated according to the latest distribution operation data corresponding to the abnormal distribution equipment and the i continuous distribution operation data before the abnormality, compared with the situation that only the latest distribution operation data is sent, the reason for the abnormal fault is analyzed more quickly and efficiently according to the change trend of the i continuous distribution operation data before the abnormality to the distribution operation data before the abnormality.
Further, the fault processing method of the power distribution network system further comprises the following steps: the power distribution maintenance station continuously receives and stores the early warning signal; and when the residual capacity of the memory of the power distribution overhaul station is not enough to store the early warning signals, deleting the early warning signals with the lowest fault level to store the latest early warning signals.
It can be understood that the early warning signal is continuously received and stored by the power distribution overhaul station, and when the early warning signal can be received, the historical fault early warning signal is taken to assist in abnormal fault analysis. Because the capacity of the memory of the power distribution overhaul station is limited, when the residual capacity of the memory of the power distribution overhaul station is not enough to store the latest warning signal, the historical fault warning signal with the minimum reference meaning, namely the lowest fault level, needs to be deleted to vacate the storage space for storing the latest warning signal.
Further, the fault processing method of the power distribution network system further comprises the following steps: if a plurality of early warning signals with the lowest fault grade exist in parallel, the early warning signal with the earliest fault occurrence time is selected and deleted.
It can be understood that if a plurality of early warning signals with the lowest fault level exist in parallel, the early warning signal with the earliest fault occurrence time is selected and deleted, so that the historical fault early warning information stored in the memory of the power distribution overhaul station is the latest and has the highest reference value.
[ second embodiment ] A
A second embodiment of the present invention provides a fault handling device for a power distribution network system, where the fault handling device for the power distribution network system executes the fault handling method for the power distribution network system according to any one of the technical solutions in the first embodiment, and can achieve the same effect, and details are not repeated here to avoid repetition.
[ third embodiment ] A
A third embodiment of the present invention provides a fault handling apparatus for a power distribution network system, and with reference to fig. 3, a fault handling apparatus 300 for the power distribution network system includes: a processor 330 and a memory 310 electrically connected to the processor 330, wherein the memory 310 stores a computer program 311, and the processor 330 loads the computer program 311 to implement the fault handling method of the power distribution network system according to any one of the first embodiments, and the same effect can be achieved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A fault processing method of a power distribution network system is characterized by comprising the following steps:
constructing a distribution network topological graph according to the current direction of a distribution network during operation, wherein the starting point of the distribution network topological graph is a power supply device, the end point of the distribution network topological graph is a power utilization terminal, and the nodes of the distribution network topological graph are power distribution devices; at least one of the power distribution devices is disposed between the power supply device and the consumer terminal to form a distribution line; each of the power distribution devices has a unique node identification number;
acquiring a node temperature value corresponding to each power distribution device in real time, and calculating an abnormal deviation value according to the node temperature value and an abnormal temperature threshold value;
judging whether the power distribution equipment corresponding to the node temperature value is abnormal or not according to the magnitude relation between the abnormal deviation value and the deviation threshold value;
if the abnormal power distribution equipment is abnormal, acquiring the total quantity of the power distribution equipment in the distribution line where the abnormal power distribution equipment is located and the quantity of the power distribution equipment between the abnormal power distribution equipment and the power supply equipment, and calculating the node importance degree of the corresponding node of the abnormal power distribution equipment;
calculating a fault level according to the abnormal deviation value and the importance degree of the node;
generating an early warning signal according to the fault grade, the fault occurrence time, the node temperature value corresponding to the abnormal power distribution equipment, the node identification number corresponding to the abnormal power distribution equipment, the positioning data corresponding to the abnormal power distribution equipment and the power distribution operation data corresponding to the abnormal power distribution equipment, and sending the early warning signal to a power distribution overhaul station;
wherein, K = (T) Node point -T Threshold value ）/T Threshold value ；T Node point Is a node temperature value; t is Threshold value Is an abnormal temperature threshold; k is an abnormal deviation value; m = (N) 1 -N 2 ) /N 1 (ii) a M is the importance degree of the node; n is a radical of 1 The total number of the distribution equipment in the distribution line where the abnormal distribution equipment is located is determined; n is a radical of 2 The number of the power distribution equipment between the abnormal power distribution equipment and the power supply equipment is set; l = int (12.5K + 0.5M); l is a fault grade; t is Threshold value Is 70 ℃; n is a radical of 1 Has a value range of [1, 10 ]]；N 2 Has a value range of [0, 9]](ii) a L has a value in the range of [1,4 ]]。
2. The method according to claim 1, wherein the deviation threshold comprises a first deviation threshold, and the determining whether the power distribution equipment corresponding to the node temperature value is abnormal according to the magnitude relationship between the abnormal deviation value and the deviation threshold comprises:
if the abnormal deviation value is larger than a first deviation threshold value, judging that the power distribution equipment corresponding to the node temperature value is abnormal;
wherein, the value range of the first deviation threshold is [0,0.09].
3. The method of fault handling for an electrical distribution network system of claim 2, wherein the deviation threshold further comprises a second deviation threshold, and wherein the second deviation threshold is greater than the first deviation threshold;
if the abnormal deviation value is larger than a second deviation threshold value, judging that L =4;
wherein, the value range of the second deviation threshold is [0.29,0.43].
4. The method for fault handling in an electrical distribution network system of claim 1, wherein the method for fault handling in an electrical distribution network system further comprises:
if the acquired node temperature value is a null value, generating a sensor fault signal according to the node identification number and the positioning data of the power distribution equipment corresponding to the null value, and sending the sensor fault signal to a power distribution maintenance station;
acquiring a node temperature value of first power distribution equipment which is positioned on one side, close to the power utilization terminal, of the power distribution equipment corresponding to the null value and is directly connected with the power distribution equipment corresponding to the null value, calculating a first abnormal deviation value, and judging whether the power distribution equipment corresponding to the null value is abnormal or not according to the magnitude relation between the first abnormal deviation value and the deviation threshold value;
wherein, K 1 =（T Node 1 -T Threshold value ）/T Threshold value ，T Node 1 The node temperature value of the first power distribution equipment which is positioned at one side of the power distribution equipment corresponding to the null value, close to the power utilization terminal and is directly connected with the power distribution equipment corresponding to the null value is obtained; k 1 Is the first anomalous deviation value.
5. The method for fault handling in an electrical distribution network system of claim 1, wherein the method for fault handling in an electrical distribution network system further comprises:
collecting power distribution operation data corresponding to each power distribution device every other preset time length and recording the power distribution operation data to a power distribution network memory;
the power distribution operation data corresponding to the abnormal power distribution equipment comprises the following data: the latest power distribution operation data corresponding to the abnormal power distribution equipment and the i continuous power distribution operation data before the abnormality occurs.
6. The method of fault handling in a power distribution network system of claim 5, wherein i is 24.
7. The fault handling method of the power distribution network system according to claim 5, wherein the fault handling method of the power distribution network system further comprises:
the power distribution maintenance station continuously receives and stores the early warning signal;
and when the residual capacity of a storage of the power distribution overhaul station is not enough to store the early warning signals, deleting the early warning signals with the lowest fault grade to store the latest early warning signals.
8. The fault handling method of the power distribution network system according to claim 7, wherein the fault handling method of the power distribution network system further comprises:
if a plurality of early warning signals with the lowest fault grade exist in parallel, the early warning signal with the earliest fault occurrence time is selected and deleted.
9. A fault handling device of a power distribution network system, characterized in that the fault handling device of the power distribution network system performs the fault handling method of the power distribution network system according to any one of claims 1-8.
10. A fault handling device for a power distribution network system, the fault handling device comprising: a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the method of fault handling for a power distribution network system as claimed in any one of claims 1 to 8.
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