CN113239097A - Transformer area leakage potential safety hazard analysis method and system - Google Patents
Transformer area leakage potential safety hazard analysis method and system Download PDFInfo
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Abstract
The invention discloses a method and a system for analyzing potential safety hazards of power leakage of a transformer area, wherein the method comprises the following steps: collecting time sequence data of a feeder line at an outlet of the transformer substation and time sequence data of a meter box side; generating a transformer side outlet feeder leakage current exceeding event and a meter box side leakage current exceeding event; when the leakage current of the transformer side outlet feeder line exceeds the standard, judging whether a meter box side leakage current exceeding event exists at the side of a meter box connected with the transformer side outlet feeder line; if not, analyzing the excessive leakage current event of the transformer outlet feeder line based on the time sequence data of the transformer outlet feeder line; when the event that the leakage current on the meter box side exceeds the standard occurs, the event that the leakage current on the meter box side exceeds the standard is analyzed based on the time sequence data on the meter box side. And generating rules according to the over-standard event of the leakage current of the transformer side outlet feeder line and the over-standard event of the leakage current of the meter box side, and automatically diagnosing the reasons of the over-standard event of the leakage current of the transformer side outlet feeder line and the over-standard event of the leakage current of the meter box side according to the collected data, thereby providing a targeted operation and maintenance strategy for operation and maintenance personnel.
Description
Technical Field
The invention belongs to the technical field of distribution and utilization of electricity, and particularly relates to a method and a system for analyzing potential safety hazards of power leakage of a transformer area.
Background
The platform district electric leakage potential safety hazard has increased the probability that the person electrocuted and the equipment accident takes place, along with the continuous increase of low pressure rack construction transformation dynamics, most platform districts have covered the two-stage and have leaked the guarantor, and the platform district is always protected with well guarantor (table case side) promptly, and this provides powerful technical guarantee for promoting platform district safe operation level. Although the transformer area covers two-stage leakage protection, the transformer area side leakage current, the current and the current are monitored and collected, the potential safety hazard situation of the transformer area leakage cannot be accurately and comprehensively mastered, meanwhile, due to the fact that comprehensive collected data cannot be obtained, when the transformer area leakage tripping operation is carried out, the existing data cannot be utilized for reason diagnosis and analysis, the transformer area leakage tripping operation is frequently carried out, the workload of power supply station operation and maintenance personnel is large, the operation and maintenance pertinence is not strong, and the operation and maintenance efficiency is low.
Therefore, on the basis of collecting data such as leakage current, current and voltage on the distribution transformer side and the meter box side, the reason of the potential safety hazard of the transformer area is accurately diagnosed by comprehensively analyzing the collected data, and then a scientific and reasonable potential safety hazard treatment strategy of the leakage is formulated, so that the method has important significance for improving the safety level of the transformer area.
Disclosure of Invention
The invention provides a method and a system for analyzing potential safety hazards of power leakage of a transformer area, which are used for solving at least one of the technical problems.
In a first aspect, the invention provides a method for analyzing potential safety hazards of power leakage of a transformer area, which comprises the following steps: step 1, acquiring time sequence data of a feeder line at an outlet of a transformer substation and time sequence data of a meter box side; step 2, generating a transformer side outlet feeder leakage current exceeding event and a meter box side leakage current exceeding event based on the time sequence data of the transformer side outlet feeder and the time sequence data of the meter box side; step 3, when the leakage current of the transformer side outlet feeder line exceeds the standard, judging whether a meter box side leakage current exceeding event exists at the side of a meter box connected with the transformer side outlet feeder line; if not, analyzing the transformer outlet feeder leakage current exceeding event based on the time sequence data of the transformer outlet feeder, wherein the analyzing the transformer outlet feeder leakage current exceeding event comprises the following steps: step 3.1, during the period that the leakage current of the transformer outlet feeder line exceeds the standard, calculating the three-phase current imbalance rate of each acquisition point of the outlet feeder line
(ii) a Step 3.2, if the three-phase current unbalance rate
If the maximum value of the feeder line leakage current exceeds the first preset value, the three-phase current is not less than the first threshold value, the fault-exceeding event of the feeder line leakage current at the outlet of the transformer area is transformer area three-phase imbalance, and if the fault-exceeding event is not the transformer area three-phase imbalance, the flow is transferred to the step 3.3; step 3.3, during the occurrence period of the over-standard leakage current of the feeder line at the outlet of the transformer station, if the humidity of the side of the transformer station exceeds the standard, the humidity of the side of the transformer station
Maximum value not less than second preset value or rainfall
If the maximum value is not less than the third preset value, judging that the fault transformer outlet feeder leakage current overproof event is insulated and damped, if not, transferring to the step3.4; step 3.4, during the occurrence of the fault exceeding event of the leakage current of the transformer outlet feeder line, if any phase of outlet voltage values of the outlet A phase, the outlet B phase and the outlet C phase is smaller than a second threshold value, judging that the fault exceeding event of the leakage current of the transformer outlet feeder line is a broken line fault, and if not, judging that the fault exceeding event of the leakage current of the transformer outlet feeder line is not judged; and 4, when the leakage current of the meter box side exceeds the standard, analyzing the leakage current exceeding standard event of the meter box side based on the time sequence data of the meter box side.
In a second aspect, the present invention provides a platform region leakage potential safety hazard analysis system, including: the acquisition module is configured to acquire time sequence data of the feeder line at the outlet of the transformer substation and time sequence data of the meter box side; the generating module is configured to generate a transformer side outlet feeder leakage current exceeding event and a meter box side leakage current exceeding event based on the time sequence data of the transformer outlet feeder and the time sequence data of the meter box side; the first analysis module is configured to judge whether a meter box side leakage current exceeding event exists at a meter box side connected with the transformer side outlet feeder line when the transformer side outlet feeder line leakage current exceeding event occurs; if not, analyzing the transformer outlet feeder leakage current exceeding event based on the time sequence data of the transformer outlet feeder, wherein the analyzing the transformer outlet feeder leakage current exceeding event comprises the following steps: during the occurrence period of the over-standard leakage current event of the transformer outlet feeder line, calculating the three-phase current imbalance rate of each acquisition point of the outlet feeder line
(ii) a If the unbalance rate of the three-phase current
If the maximum value of the three-phase current is not less than a first preset value and the maximum value of the three-phase current is not less than a first threshold value, the fault-exceeding event of the feeder line leakage current at the outlet of the transformer area is transformer area three-phase imbalance; if the unbalance rate of the three-phase current
Is less than a first preset value or the maximum value of the three-phase current is less than a first threshold value, and is arranged at a transformer outletJudging the humidity of the variable side of the station during the occurrence period of the feed line leakage current exceeding the standard
Whether the maximum value is not less than a second preset value or the rainfall
Whether the maximum value is not less than a third preset value; if station becomes lateral humidity
Maximum value not less than second preset value or rainfall
If the maximum value is not less than a third preset value, judging that the fault transformer outlet feeder leakage current exceeding event is insulation damp; if station becomes lateral humidity
Maximum value less than second preset value or rainfall
The maximum value is smaller than a third preset value, and whether any phase of outlet voltage values of an outlet A phase, an outlet B phase and an outlet C phase is smaller than a second threshold value is judged during the occurrence period of the standard exceeding event of the leakage current of the transformer outlet feeder line; if any phase of outlet voltage values of the outlet A phase, the outlet B phase and the outlet C phase is smaller than a second threshold value, judging that the fault of the leakage current of the outlet feeder line of the transformer area is a disconnection fault, and if not, judging that the fault of the leakage current of the outlet feeder line of the transformer area is a fault; and the second analysis module is configured to analyze the electric leakage exceeding event of the meter box side based on the time sequence data of the meter box side when the electric leakage exceeding event of the meter box side occurs.
In a third aspect, an electronic device is provided, comprising: the system comprises at least one processor and a memory which is in communication connection with the at least one processor, wherein the memory stores instructions which can be executed by the at least one processor, and the instructions are executed by the at least one processor, so that the at least one processor can execute the steps of the station leakage potential safety hazard analysis method according to any embodiment of the invention.
In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, the computer program including program instructions, which, when executed by a computer, cause the computer to execute the steps of the station area electrical leakage potential safety hazard analysis method according to any one of the embodiments of the present invention.
According to the method and the system, rules are generated according to the transformer side outlet feeder leakage current exceeding event and the meter box side leakage current exceeding event on the basis of transformer side outlet and meter box side data acquisition, and the causes of the transformer side outlet feeder and the meter box side leakage current exceeding event are automatically diagnosed according to the acquired data, so that a targeted operation and maintenance strategy is provided for operation and maintenance personnel.
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 some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a flowchart of a method for analyzing a potential safety hazard of power-grid-area leakage according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a diagnosis process for reasons of excessive leakage at the outlets of the transformer side feeder according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating the diagnosis of the cause of the excessive leakage current at the side of the meter box according to an embodiment of the present invention;
fig. 4 is a block diagram of a system for analyzing potential safety hazards due to leakage in a distribution room according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a flowchart of a method for analyzing a potential safety hazard of a distribution room leakage according to the present application is shown.
As shown in fig. 1, in step 1, time series data of the station transformer outlet feeder and time series data of the meter box side are collected.
In this embodiment, install at platform and install the electric leakage collection system additional in transformer side export feeder, the data of gathering includes three-phase voltage
Three-phase current
Leakage current
The humidity sensor and the rainfall sensor are installed in the environment outside the transformer substation side, and the collected data comprises humidity
Rainfall, rainfall
The meter box side is additionally provided with an electric leakage acquisition device, and the acquired data comprises three-phase voltage
Three-phase current
Leakage current
The acquisition interval can be set according to actual conditions, generally takes 15min, the station transformer side acquisition data is transmitted to the intelligent fusion terminal or the concentrator through an RS485 interface, the meter box side acquisition data is transmitted to the intelligent fusion terminal or the concentrator through an HPLC high-speed carrier technology, and the distribution transformer fusion terminal or the concentrator sends the acquisition time sequence data to the preposed acquisition server and the storage database.
In step 2, generating an event that the leakage current of the transformer side outlet feeder exceeds the standard and an event that the leakage current of the meter box side exceeds the standard based on the time sequence data of the transformer side outlet feeder and the time sequence data of the meter box side.
In this embodiment, leakage current of the exit feeder line if the transformer side is changed
Greater than a first predetermined current threshold
Generating an event that the leakage current of the transformer outlet feeder exceeds the standard when the duration is more than or equal to one hour (generally 300 mA), wherein the event information comprises a transformer area name, a low-voltage feeder name, a maximum leakage current value, leakage starting time, leakage terminating time and diagnosis reasons; if meter box side leakage current
Greater than a second predetermined current threshold
And (generally 40 mA), generating a case side leakage current exceeding event when the duration is more than or equal to one hour, wherein the event information comprises a transformer area name, a low-voltage feeder name, a case name, a leakage current maximum value, leakage starting time, leakage stopping time and diagnosis reasons.
In step 3, when the leakage current of the transformer side outlet feeder line exceeds the standard, judging whether a meter box side leakage current exceeding event exists on the meter box side connected with the transformer side outlet feeder line;
if not, analyzing the transformer outlet feeder leakage current exceeding event based on the time sequence data of the transformer outlet feeder, wherein the analyzing the transformer outlet feeder leakage current exceeding event comprises the following steps:
step 3.1, during the period that the leakage current of the transformer outlet feeder line exceeds the standard, calculating the three-phase current imbalance rate of each acquisition point of the outlet feeder line
；
Step 3.2, if the three-phase current unbalance rate
If the maximum value of the feeder line leakage current exceeds the first preset value, the three-phase current is not less than the first threshold value, the fault-exceeding event of the feeder line leakage current at the outlet of the transformer area is transformer area three-phase imbalance, and if the fault-exceeding event is not the transformer area three-phase imbalance, the flow is transferred to the step 3.3;
step 3.3, during the occurrence period of the over-standard leakage current of the feeder line at the outlet of the transformer station, if the humidity of the side of the transformer station exceeds the standard, the humidity of the side of the transformer station
Maximum value not less than second preset value or rainfall
If the maximum value is not less than the third preset value, judging that the fault transformer outlet feeder leakage current exceeding event is insulation damp, and if not, transferring to the step 3.4;
step 3.4, during the occurrence of the fault exceeding event of the leakage current of the transformer outlet feeder line, if any phase of outlet voltage values of the outlet A phase, the outlet B phase and the outlet C phase is smaller than a second threshold value, judging that the fault exceeding event of the leakage current of the transformer outlet feeder line is a broken line fault, and if not, judging that the fault exceeding event of the leakage current of the transformer outlet feeder line is not judged;
in step 4, when the leakage current of the meter box side exceeds the standard, analyzing the leakage current exceeding standard event of the meter box side based on the time sequence data of the meter box side.
In this embodiment, analyzing the meter box side electrical leakage superstandard event based on the time series data of the meter box side includes:
step 4.1, judging whether a transformer side outlet feeder leakage current exceeding event with the starting time of the transformer side outlet feeder leakage current exceeding event of the upper stage being smaller than the end time of the meter box side leakage current exceeding event and being larger than the starting time of the meter box side leakage current exceeding event exists or not during the occurrence period of the meter box side leakage current exceeding event; if yes, no analysis is carried out, the diagnosis reason is empty, otherwise, the flow is transferred to the step 4.2;
step 4.2, during the occurrence period of the over-standard event of the leakage current at the side of the meter box, calculating the three-phase current unbalance rate of each acquisition point, and if the three-phase current unbalance rate is not equal to the preset value
If the maximum value is not less than the first preset value and the current maximum value is not less than the first threshold value, judging that the event that the side leakage current of the meter box exceeds the standard is three-phase imbalance, and if not, transferring to the step 4.3;
step 4.3, during the occurrence period of the over-standard leakage current at the side of the meter box, if the humidity of the side of the meter box is changed
Maximum value not less than second preset value or rainfall
If the maximum value is not less than the third preset value, judging that the event that the side leakage current of the meter box exceeds the standard is insulation damp, and if not, transferring to the step 4.4;
and 4.4, during the occurrence period of the case side leakage current exceeding event, if any one of the case side voltage values of the A phase, the B phase and the C phase of the case side outgoing line is smaller than a second threshold value, judging that the case side leakage current exceeding event is a broken line fault, and if not, judging that the case side leakage current exceeding event cannot be analyzed.
In summary, in the method of this embodiment, data of the station-to-substation side outlet and the meter box side are collected, and a rule is generated according to the event that the leakage current of the feeder line at the station-to-substation side outlet exceeds the standard and the event that the leakage current of the meter box side exceeds the standard, so that the reason for the event that the leakage current of the feeder line at the station-to-substation side outlet and the leakage current of the meter box side exceeds the standard is automatically diagnosed based on the collected data, and a targeted operation and maintenance strategy is provided for operation and maintenance personnel.
In some optional embodiments, after step 4, the method further comprises: and forming a work order of the potential safety hazard of the transformer area leakage based on the event that the leakage current of the transformer side outlet feeder line exceeds the standard and the event that the leakage current of the meter box side exceeds the standard, wherein the work order content comprises a transformer area name, an outlet feeder line name, a meter box side name, a power supply station name, abnormal time, a maximum leakage current value, a diagnosis and analysis result, operation and maintenance personnel, a mobile phone number, order dispatching time and filing time.
According to the method, the station area leakage potential safety hazard work order is generated according to the station transformer side outlet feeder line and the case side leakage current exceeding event, operation and maintenance personnel can conveniently and rapidly operate and maintain the station area leakage potential safety hazard, and the risk of the station area leakage potential safety hazard is reduced.
Referring to fig. 2, a flow chart of diagnosis of cause of excessive feeder leakage at the outlets of the transformer side according to an embodiment of the present application is shown.
As shown in fig. 2, when the leakage current of the station transformer side outlet feeder exceeds the standard, the leakage current exceeding event of the meter box side under the zone connected with the station transformer side outlet feeder is searched;
the method comprises the steps that the starting time of the case side leakage current exceeding event is smaller than the ending time of the transformer side outlet feeder leakage current exceeding event and larger than the starting time of the transformer side outlet feeder leakage current exceeding event, all case side leakage current exceeding events under the transformer side outlet feeder form a case side leakage current exceeding event set
If, if
If the output feeder line is empty, calculating the three-phase current unbalance rate of each acquisition point of the output feeder line during the occurrence period of the over-standard leakage current event of the transformer output feeder line, wherein the calculation formula is shown as (1), and if the three-phase current unbalance rate beta T maximum value is not less than 40% and the three-phase current maximum value is not less than 50A, the output feeder line of the transformer area is fedThe reason for diagnosing the exceeding of the line leakage current is the three-phase imbalance of the transformer area;
in the formula (I), the compound is shown in the specification,
、
、
respectively the phase A current, the phase B current and the phase C current of the feeder line at the outlet of the ith acquisition distribution area,
and the three-phase current unbalance rate is the ith acquisition point.
If the three-phase current unbalance rate beta T maximum value is less than 40% or the three-phase current maximum value is less than 50A, judging the humidity of the transformer side of the transformer during the occurrence period of the over-standard event of the feeder line leakage current of the transformer outlet
Whether or not the maximum value is not less than 80% or the rainfall
Whether the maximum value is not less than 5 mm;
if station becomes lateral humidity
Maximum value of not less than 80% or rainfall
If the maximum value is not less than 5mm, judging the reason that the leakage current of the feeder line at the outlet of the transformer area exceeds the standard and diagnosing that the feeder line is insulated and damped;
if station becomes lateral humidity
Maximum value less than 80% or rainfall
If the maximum value is less than 5mm, judging whether any phase outlet voltage value of the outlet A phase, the outlet B phase and the outlet C phase is less than 80V or not during the occurrence period of the over-standard event of the feeder line leakage current at the outlet of the transformer area,
if any phase of outlet voltage values of the outlet A phase, the outlet B phase and the outlet C phase is smaller than 80V, judging that the cause of the over-standard leakage current diagnosis of the zone outlet feeder line is a disconnection fault, and if not, judging that the cause of the over-standard leakage current diagnosis of the zone outlet feeder line cannot be judged;
if it is
If the output feeder is not empty, the leakage current exceeding event sets at the side of the meter box under the output feeder are sequentially subjected to
The reason of the leakage current exceeding event in the process of analysis is specifically as follows:
during the occurrence period of the over-standard event of the leakage current at the side of the meter box, calculating the three-phase current unbalance rate of each acquisition point, wherein the calculation formula is shown as (2), and if the three-phase current unbalance rate is not equal to the preset value
If the maximum value is not less than 40% and the current maximum value is not less than 10A, the reason that the side leakage current of the meter box exceeds the standard is diagnosed as three-phase imbalance, and correspondingly, the reason that the side leakage current of the meter box exceeds the standard is added on the original basis;
in the formula (I), the compound is shown in the specification,
respectively an ith acquisition point meter boxSide phase A, B and C currents,
and the unbalance rate of the three-phase current at the ith acquisition point meter box side is obtained.
If the unbalance rate of three-phase current
The maximum value is less than 40% or the current maximum value is less than 10A, the humidity of the side of the table is judged during the occurrence period of the over-standard event of the side leakage current of the meter box
Whether or not the maximum value is not less than 80% or the rainfall
Whether the maximum value is not less than 5 mm;
if station becomes lateral humidity
Maximum value of not less than 80% or rainfall
If the maximum value is not less than 5mm, judging that the reason that the side leakage current of the meter box exceeds the standard is insulated and damped, and correspondingly adding the content of the reason that the side leakage current of the meter box exceeds the standard to the original reason that the side leakage current of the meter box exceeds the standard and the reason that the side leakage current of the meter box exceeds the standard is insulated and damped;
if station becomes lateral humidity
Maximum value less than 80% or rainfall
The maximum value is less than 5mm, and whether any one of the phases A, B and C of the outgoing line at the meter box side has a meter box side voltage value less than 40V is judged during the occurrence of the over-standard event of the leakage current at the meter box side;
if any one of the phase A, the phase B and the phase C of the outgoing line at the side of the meter box has a meter box side voltage value smaller than 40V, the reason that the leakage current at the side of the meter box exceeds the standard is judged to be a disconnection fault, and correspondingly, the reason that the leakage current at the side of the transformer substation outlet feeder exceeds the standard is added on the original basis to the reason that the leakage current at the side of the meter box exceeds the standard and is diagnosed to be the disconnection fault;
if any one of the phase A, phase B and phase C of the outgoing line at the meter box side has a meter box side voltage value not less than 40V, the reason for diagnosing the excessive leakage current at the meter box side is judged to be unable to diagnose, and correspondingly, the reason for the excessive leakage current at the transformer side outlet feeder line is added on the original basis to judge that the reason for diagnosing the excessive leakage current at the meter box side is unable to diagnose.
Referring to fig. 3, a flowchart of diagnosis of cause of over-standard meter box side leakage current according to an embodiment of the present application is shown.
As shown in fig. 3, when an event that the leakage current at the side of the meter box exceeds the standard occurs, searching whether an event that the leakage current at the outlet feeder at the side of the transformer station exceeds the standard, where the starting time of the event is less than the ending time of the event that the leakage current at the side of the meter box exceeds the standard and is greater than the starting time of the event that the leakage current at the side of the meter box exceeds the standard, exists, then analyzing and diagnosing are not performed, and the diagnosis reason is null;
if the transformer side output feeder leakage current exceeding event that the starting time of the upper transformer side output feeder leakage current exceeding event is smaller than the end time of the meter box side leakage current exceeding event and larger than the starting time of the meter box side leakage current exceeding event does not exist, calculating the three-phase current imbalance rate of each acquisition point during the occurrence period of the meter box side leakage current exceeding event, and judging the three-phase current imbalance rate
Whether the maximum value is not less than 40% and whether the current maximum value is not less than 10A;
if the unbalance rate of three-phase current
The maximum value is not less than 40% and the maximum value of the current is not less than 10A, the reason that the side leakage current of the meter box exceeds the standard is diagnosed as three-phase imbalance, and the reason that the side leakage current of the meter box exceeds the standard is diagnosed as three-phase imbalance;
if the unbalance rate of three-phase current
The maximum value is less than 40% or the current maximum value is less than 10A, the humidity of the side of the table is judged during the occurrence period of the over-standard event of the side leakage current of the meter box
Whether or not the maximum value is not less than 80% or the rainfall
Whether the maximum value is not less than 5 mm;
if station becomes lateral humidity
Maximum value of not less than 80% or rainfall
If the maximum value is not less than 5mm, judging that the reason that the side leakage current of the meter box exceeds the standard is insulation damp;
if station becomes lateral humidity
Maximum value less than 80% or rainfall
If the maximum value is less than 5mm, judging whether one of the phases A, B and C of the outgoing lines at the meter box side has a meter box side voltage value of less than 40V during the occurrence of the over-standard event of the leakage current at the meter box side;
if the voltage values of meter box sides in the phases A, B and C of the outlet wires at the meter box sides are all smaller than 40V, the reason that the leakage current at the meter box sides exceeds the standard is judged to be a disconnection fault, otherwise, the reason that the leakage current at the meter box sides exceeds the standard is judged to be an incapability of diagnosis, and the diagnosis process of the reason that the leakage current at the meter box sides exceeds the standard is finished.
Referring to fig. 4, a block diagram of a station area leakage potential safety hazard analysis system according to an embodiment of the present disclosure is shown.
As shown in fig. 4, the platform area electrical leakage safety hazard analysis system 200 includes an acquisition module 210, a generation module 220, a first analysis module 230, and a second analysis module 240.
The acquisition module 210 is configured to acquire time sequence data of the feeder line at the outlet of the station transformer and time sequence data of the meter box side; the generating module 220 is configured to generate a transformer side outlet feeder leakage current exceeding event and a meter box side leakage current exceeding event based on the time sequence data of the transformer outlet feeder and the time sequence data of the meter box side; the first analysis module 230 is configured to determine whether a meter box side leakage current exceeding event exists on a meter box side connected to the substation side outlet feeder when the substation side outlet feeder leakage current exceeding event occurs; if not, analyzing the leakage current exceeding event of the transformer outlet feeder line based on the time sequence data of the transformer outlet feeder line; and the second analysis module 240 is configured to analyze the leakage exceeding event of the meter box side based on the time sequence data of the meter box side when the leakage exceeding event of the meter box side occurs.
It should be understood that the modules depicted in fig. 4 correspond to various steps in the method described with reference to fig. 1. Thus, the operations and features described above for the method and the corresponding technical effects are also applicable to the modules in fig. 4, and are not described again here.
In other embodiments, an embodiment of the present invention further provides a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and the computer-executable instructions may execute the method for analyzing the potential safety hazard of the power distribution room leakage in any of the above method embodiments;
as one embodiment, the computer-readable storage medium of the present invention stores computer-executable instructions configured to:
collecting time sequence data of a feeder line at an outlet of the transformer substation and time sequence data of a meter box side;
generating a transformer side outlet feeder leakage current exceeding event and a meter box side leakage current exceeding event based on the time sequence data of the transformer outlet feeder and the time sequence data of the meter box side;
when the leakage current of the transformer side outlet feeder line exceeds the standard, judging whether a meter box side leakage current exceeding event exists at the side of a meter box connected with the transformer side outlet feeder line;
if not, analyzing the leakage current exceeding event of the transformer outlet feeder line based on the time sequence data of the transformer outlet feeder line;
when the leakage current of the meter box side exceeds the standard, analyzing the leakage current exceeding event of the meter box side based on the time sequence data of the meter box side.
The computer-readable storage medium may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created from use of the station area leakage potential safety hazard analysis system, and the like. Further, the computer-readable storage medium may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the computer-readable storage medium optionally includes memory located remotely from the processor, and these remote memories may be connected to the station area electrical leakage safety hazard analysis system via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 5, the electronic device includes: a processor 310 and a memory 320. The electronic device may further include: an input device 330 and an output device 340. The processor 310, the memory 320, the input device 330, and the output device 340 may be connected by a bus or other means, as exemplified by the bus connection in fig. 5. The memory 320 is the computer-readable storage medium described above. The processor 310 executes various functional applications and data processing of the server by running the nonvolatile software program, instructions and modules stored in the memory 320, that is, the method for analyzing the potential safety hazard of power leakage in the transformer area of the above embodiment of the method is implemented. The input device 330 may receive input numeric or character information and generate key signal inputs related to user settings and function controls of the station area electrical leakage safety hazard analysis system. The output device 340 may include a display device such as a display screen.
The device can execute the method provided by the embodiment of the invention and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
As an embodiment, the electronic device is applied to a platform region leakage potential safety hazard analysis system, and is used for a client, and includes: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to:
collecting time sequence data of a feeder line at an outlet of the transformer substation and time sequence data of a meter box side;
generating a transformer side outlet feeder leakage current exceeding event and a meter box side leakage current exceeding event based on the time sequence data of the transformer outlet feeder and the time sequence data of the meter box side;
when the leakage current of the transformer side outlet feeder line exceeds the standard, judging whether a meter box side leakage current exceeding event exists at the side of a meter box connected with the transformer side outlet feeder line;
if not, analyzing the leakage current exceeding event of the transformer outlet feeder line based on the time sequence data of the transformer outlet feeder line;
when the leakage current of the meter box side exceeds the standard, analyzing the leakage current exceeding event of the meter box side based on the time sequence data of the meter box side.
The above-described system embodiments are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
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 will 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 transformer area electric leakage potential safety hazard analysis method is characterized by comprising the following steps:
step 1, acquiring time sequence data of a feeder line at an outlet of a transformer substation and time sequence data of a meter box side;
step 2, generating a transformer side outlet feeder leakage current exceeding event and a meter box side leakage current exceeding event based on the time sequence data of the transformer side outlet feeder and the time sequence data of the meter box side;
step 3, when the leakage current of the transformer side outlet feeder line exceeds the standard, judging whether a meter box side leakage current exceeding event exists at the side of a meter box connected with the transformer side outlet feeder line;
if not, analyzing the transformer outlet feeder leakage current exceeding event based on the time sequence data of the transformer outlet feeder, wherein the analyzing the transformer outlet feeder leakage current exceeding event comprises the following steps:
step 3.1, during the period that the leakage current of the transformer outlet feeder line exceeds the standard, calculating the three-phase current imbalance rate of each acquisition point of the outlet feeder line
；
Step 3.2, if the three-phase current unbalance rate
Maximum value ofIf the current is smaller than the first preset value and the maximum value of the three-phase current is not smaller than the first threshold value, the event that the leakage current of the feeder line at the outlet of the transformer area exceeds the standard is the three-phase imbalance of the transformer area, and if not, the flow is transferred to the step 3.3;
step 3.3, during the occurrence period of the over-standard leakage current of the feeder line at the outlet of the transformer station, if the humidity of the side of the transformer station exceeds the standard, the humidity of the side of the transformer station
Maximum value not less than second preset value or rainfall
If the maximum value is not less than the third preset value, judging that the fault transformer outlet feeder leakage current exceeding event is insulation damp, and if not, transferring to the step 3.4;
step 3.4, during the occurrence of the fault exceeding event of the leakage current of the transformer outlet feeder line, if any phase of outlet voltage values of the outlet A phase, the outlet B phase and the outlet C phase is smaller than a second threshold value, judging that the fault exceeding event of the leakage current of the transformer outlet feeder line is a broken line fault, and if not, judging that the fault exceeding event of the leakage current of the transformer outlet feeder line is not judged;
and 4, when the leakage current of the meter box side exceeds the standard, analyzing the leakage current exceeding standard event of the meter box side based on the time sequence data of the meter box side.
2. The method for analyzing the potential safety hazard of power grid leakage according to claim 1, wherein after the step 4, the method further comprises:
and forming a work order of the potential safety hazard of the transformer area leakage based on the event that the leakage current of the transformer side outlet feeder line exceeds the standard and the event that the leakage current of the meter box side exceeds the standard, wherein the work order content comprises a transformer area name, an outlet feeder line name, a meter box side name, a power supply station name, abnormal time, a maximum leakage current value, a diagnosis and analysis result, operation and maintenance personnel, a mobile phone number, order dispatching time and filing time.
3. The method for analyzing the potential safety hazard of leakage of the transformer area according to claim 1, wherein in step 1, the time series data of the transformer outlet feeder comprises voltage data of a transformer side feeder, current data of the transformer side feeder, leakage current data of the transformer side feeder, humidity data of the transformer side feeder and rainfall data of the transformer side feeder.
4. The transformer area leakage potential safety hazard analysis method according to claim 1, wherein in step 1, the meter box side time series data comprises meter box side voltage, meter box side current and meter box side leakage current.
5. The method for analyzing the potential safety hazard of the transformer area leakage, according to claim 1, wherein in the step 2, the generating of the event that the leakage current of the transformer side outlet feeder line exceeds the standard and the event that the leakage current of the meter box side exceeds the standard is specifically:
if leakage current of the outlet feeder line of the transformer side
Greater than a first predetermined current threshold
Generating a standard exceeding event of the leakage current of the transformer outlet feeder when the duration is more than or equal to one hour;
if meter box side leakage current
Greater than a second predetermined current threshold
And if the duration is longer than or equal to one hour, an event that the leakage current on the side of the meter box exceeds the standard is generated.
6. The transformer area electric leakage potential safety hazard analysis method according to claim 1, wherein in step 3.1, the three-phase current imbalance rate
The calculation formula of (A) is as follows:
in the formula (I), the compound is shown in the specification,
、
、
respectively the phase A current, the phase B current and the phase C current of the feeder line at the outlet of the ith acquisition distribution area,
and the three-phase current unbalance rate is the ith acquisition point.
7. The analysis method for the potential safety hazard of leakage of the transformer area according to claim 1, wherein in the step 4, the analyzing the case-side leakage exceeding event comprises:
step 4.1, judging whether a transformer side outlet feeder leakage current exceeding event with the starting time of the transformer side outlet feeder leakage current exceeding event of the upper stage being smaller than the end time of the meter box side leakage current exceeding event and being larger than the starting time of the meter box side leakage current exceeding event exists or not during the occurrence period of the meter box side leakage current exceeding event; if yes, no analysis is carried out, the diagnosis reason is empty, otherwise, the flow is transferred to the step 4.2;
step 4.2, during the occurrence period of the over-standard event of the leakage current at the side of the meter box, calculating the three-phase current unbalance rate of each acquisition point, and if the three-phase current unbalance rate is not equal to the preset value
If the maximum value is not less than the first preset value and the current maximum value is not less than the first threshold value, judging that the event that the side leakage current of the meter box exceeds the standard is three-phase imbalance, and if not, transferring to the step 4.3;
step 4.3, during the occurrence period of the over-standard leakage current at the side of the meter box, if the humidity of the side of the meter box is changed
Maximum value not less than second preset value or rainfall
If the maximum value is not less than the third preset value, judging that the event that the side leakage current of the meter box exceeds the standard is insulation damp, and if not, transferring to the step 4.4;
and 4.4, during the occurrence period of the case side leakage current exceeding event, if any one of the case side voltage values of the A phase, the B phase and the C phase of the case side outgoing line is smaller than a second threshold value, judging that the case side leakage current exceeding event is a broken line fault, and if not, judging that the case side leakage current exceeding event cannot be analyzed.
8. The utility model provides a platform district electric leakage potential safety hazard analytic system which characterized in that includes:
the acquisition module is configured to acquire time sequence data of the feeder line at the outlet of the transformer substation and time sequence data of the meter box side;
the generating module is configured to generate a transformer side outlet feeder leakage current exceeding event and a meter box side leakage current exceeding event based on the time sequence data of the transformer outlet feeder and the time sequence data of the meter box side;
the first analysis module is configured to judge whether a meter box side leakage current exceeding event exists at a meter box side connected with the transformer side outlet feeder line when the transformer side outlet feeder line leakage current exceeding event occurs;
if not, analyzing the transformer outlet feeder leakage current exceeding event based on the time sequence data of the transformer outlet feeder, wherein the analyzing the transformer outlet feeder leakage current exceeding event comprises the following steps:
during the occurrence period of the over-standard leakage current event of the transformer outlet feeder line, calculating the three-phase current imbalance rate of each acquisition point of the outlet feeder line
；
If the unbalance rate of the three-phase current
If the maximum value of the three-phase current is not less than a first preset value and the maximum value of the three-phase current is not less than a first threshold value, the fault-exceeding event of the feeder line leakage current at the outlet of the transformer area is transformer area three-phase imbalance;
if the unbalance rate of the three-phase current
Is less than a first preset value or the maximum value of the three-phase current is less than a first threshold value, and the humidity of the transformer side is judged during the occurrence period of the over-standard event of the leakage current of the feeder line at the transformer outlet
Whether the maximum value is not less than a second preset value or the rainfall
Whether the maximum value is not less than a third preset value;
if station becomes lateral humidity
Maximum value not less than second preset value or rainfall
If the maximum value is not less than a third preset value, judging that the fault transformer outlet feeder leakage current exceeding event is insulation damp;
if station becomes lateral humidity
Maximum value less than second preset value or rainfall
The maximum value is smaller than a third preset value, and whether any phase of outlet voltage values of an outlet A phase, an outlet B phase and an outlet C phase is smaller than a second threshold value is judged during the occurrence period of the standard exceeding event of the leakage current of the transformer outlet feeder line;
if any phase of outlet voltage values of the outlet A phase, the outlet B phase and the outlet C phase is smaller than a second threshold value, judging that the fault of the leakage current of the outlet feeder line of the transformer area is a disconnection fault, and if not, judging that the fault of the leakage current of the outlet feeder line of the transformer area is a fault;
and the second analysis module is configured to analyze the electric leakage exceeding event of the meter box side based on the time sequence data of the meter box side when the electric leakage exceeding event of the meter box side occurs.
9. An electronic device, comprising: at least one processor, and a memory communicatively coupled to the at least one processor, wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method of any one of claims 1 to 7.
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