CN113361983B - High-loss transformer area technology cause diagnosis method and system - Google Patents

High-loss transformer area technology cause diagnosis method and system Download PDF

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CN113361983B
CN113361983B CN202110918059.9A CN202110918059A CN113361983B CN 113361983 B CN113361983 B CN 113361983B CN 202110918059 A CN202110918059 A CN 202110918059A CN 113361983 B CN113361983 B CN 113361983B
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安义
马亮
邓才波
蔡木良
戚沁雅
刘绚
蒙天骐
刘文龙
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Jiangxi Electric Power Co Ltd
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Abstract

The invention discloses a method and a system for diagnosing technical cause of a high-loss transformer area, wherein the method comprises the following steps: step 1: acquiring collected data of a platform area and a user side; step 2: when a high line loss event occurs in a transformer area, calculating the probability of the high line loss of the transformer area caused by three-phase imbalance, high load rate, low power factor and line grid problems respectively; and step 3: and (4) carrying out normalization processing on the technical cause probability vectors of the high-loss transformer area so as to obtain the high-line-loss technical cause vector probability of the transformer area. When a high line loss event occurs in a distribution room, the probability of the high line loss of the distribution room caused by four reasons, namely unbalanced three phases, high load rate, low power factor and line grid problems is calculated respectively, and the probability of the generation of the four reasons is sequenced from large to small, so that power supply station personnel can carry out on-site investigation according to the probability, and finally determine which reason causes the high line loss of the distribution room, thereby improving the pertinence of the on-site investigation of the power supply station and improving the management level of the line loss of the distribution room.

Description

High-loss transformer area technology cause diagnosis method and system
Technical Field
The invention belongs to the technical field of power distribution and utilization, and particularly relates to a method and a system for diagnosing technical cause of a high-loss transformer area.
Background
Under the large background of quality improvement and efficiency improvement of power enterprises, the enhancement of the line loss management of the transformer area has important significance. The existing transformer area high loss treatment has the defects of unclear cause diagnosis and unscientific measure formulation, incomplete transformer area high loss treatment and repeated transformer area high line loss. With the full coverage of the HPLC of the power enterprise distribution area, the types of data collected by the distribution area are rich continuously, and very valuable electric quantity data are accumulated, but the electric quantity data are used for the high-loss distribution area to be treated less, and the value of the electric quantity data is not fully reflected.
Therefore, on the basis of collecting the electric quantity data of the transformer area and the user side, the automatic diagnosis method for the technical cause of the high-loss transformer area is scientifically and reasonably designed, the cause of the high line loss of the transformer area is automatically diagnosed, the high line loss treatment strategy of the transformer area is further formulated, and the method has important significance for improving the treatment of the high-loss transformer area.
Disclosure of Invention
The present invention provides a method and a system for diagnosing a technical cause of a high-loss transformer area, which are used for solving at least one of the above technical problems.
In a first aspect, the present invention provides a method for diagnosing a technical cause of a high-loss transformer area, including:
step 1: acquiring collected data of a platform area and a user side;
step 2: when a high line loss event occurs in a transformer area, the probability of the high line loss of the transformer area caused by three-phase imbalance, high load rate, low power factor and line grid frame problem is respectively calculated, wherein the method specifically comprises the following steps:
step 2.1: and calculating the probability of high line loss of the transformer area due to three-phase imbalance, wherein the calculation formula is as follows:
Figure GDA0003347217420000021
in the formula, betaiAcquisition of Point load factor, α, for the ith station zoneiThe three-phase unbalance rate of the ith acquisition point of the transformer area is defined, tanh () is a hyperbolic tangent function, and M is a day acquisition point;
step 2.2: and calculating the probability of high line loss of the transformer area due to low power factor, wherein the calculation formula is as follows:
Figure GDA0003347217420000022
in the formula, thetaiThe power factor of the ith acquisition point of the transformer area is shown, tanh () is a hyperbolic tangent function, and M is a day acquisition point;
step 2.3: calculating the probability of high line loss of the transformer area due to high load rate, wherein the calculation formula is as follows:
Figure GDA0003347217420000023
in the formula, betaiThe load coefficient of the ith acquisition point of the transformer area is shown, tanh () is a hyperbolic tangent function, and M is a day acquisition point;
step 2.4: calculating the probability of high line loss of the transformer area caused by the problem of the line network frame, wherein the calculation formula is as follows:
Figure GDA0003347217420000024
in the formula, DA, DB and DC are respectively the number of users with the maximum value of the voltage deviation of the users belonging to the station area A, B, C phase being more than 10V, and delta UA、ΔUB、ΔUCThe maximum values of the voltage deviation values of users belonging to the station zone A, B, C are respectively, N is the number of users belonging to the station zone, and tanh () is a hyperbolic tangent function:
the expression for calculating the maximum value of the voltage deviation amount of the user to which the phase A belongs is as follows:
ΔUA＝max(ΔUA1，ΔUA2，ΔUAk，...，ΔUA(N1))，
in the formula, Δ UAThe maximum value of the voltage deviation of the user belonging to the phase A of the transformer area, N1 the number of the users belonging to the phase A of the transformer area, and Delta UAkThe maximum value of the voltage deviation value of the user k to which the phase A of the transformer area belongs is obtained, and max () is a maximum function;
calculating the maximum value of the voltage deviation amount of the k users to which the phase A belongs as follows:
ΔUAk＝max(ωAk1，ωAk2，ωAki，...，ωAkM)，
in the formula, ωAkiVoltage deviation amount of an ith acquisition point of a phase k user in the distribution area A, wherein M is a day acquisition point;
and step 3: normalizing the technical cause probability vector of the high-loss distribution area to obtain the technical cause vector probability of the high-loss distribution area, wherein the calculation formula of the technical cause vector probability of the high-loss distribution area is as follows:
Figure GDA0003347217420000031
in the formula, E is the probability that three-phase imbalance leads to the high line loss of transformer platform district, and F is the probability that power factor is low and leads to the high line loss of transformer platform district, and G is the probability that the load factor is high and leads to the high line loss of transformer platform district, and H leads to the probability of the high line loss of transformer platform district for circuit rack problem.
In a second aspect, the present invention provides a system for diagnosing a technical cause of a high-loss transformer area, including:
the acquisition module is configured to acquire acquired data of the distribution room and the user side;
the calculation module is configured to respectively calculate the probability of the high line loss of the transformer area due to four reasons, namely three-phase imbalance, high load rate, low power factor and line grid structure problem, when the high line loss event occurs in the transformer area, wherein the calculation module specifically comprises:
and calculating the probability of high line loss of the transformer area due to three-phase imbalance, wherein the calculation formula is as follows:
Figure GDA0003347217420000032
in the formula, betaiAcquisition of Point load factor, α, for the ith station zoneiThe three-phase unbalance rate of the ith acquisition point of the transformer area is defined, tanh () is a hyperbolic tangent function, and M is a day acquisition point;
and calculating the probability of high line loss of the transformer area due to low power factor, wherein the calculation formula is as follows:
Figure GDA0003347217420000033
in the formula, thetaiThe power factor of the ith acquisition point of the transformer area is shown, tanh () is a hyperbolic tangent function, and M is a day acquisition point;
calculating the probability of high line loss of the transformer area due to high load rate, wherein the calculation formula is as follows:
Figure GDA0003347217420000034
in the formula, betaiThe load coefficient of the ith acquisition point of the transformer area is shown, tanh () is a hyperbolic tangent function, and M is a day acquisition point;
calculating the probability of high line loss of the transformer area caused by the problem of the line network frame, wherein the calculation formula is as follows:
Figure GDA0003347217420000035
in the formula, DA, DB and DC are respectively the number of users with the maximum value of the voltage deviation of the users belonging to the station area A, B, C phase being more than 10V, and delta UA、ΔUB、ΔUCThe maximum values of the voltage deviation values of users to which the station zone A, B, C belongs are respectively obtained, N is the number of users to which the station zone belongs, and tanh () is a hyperbolic tangent function;
the expression for calculating the maximum value of the voltage deviation amount of the user to which the phase A belongs is as follows:
ΔUA＝max(ΔUA1，ΔUA2，ΔUAk，...，ΔUA(N1))，
in the formula, Δ UAThe maximum value of the voltage deviation of the user belonging to the phase A of the transformer area, N1 the number of the users belonging to the phase A of the transformer area, and Delta UAkThe maximum value of the voltage deviation value of the user k to which the phase A of the transformer area belongs is obtained, and max () is a maximum function;
calculating the maximum value of the voltage deviation amount of the k users to which the phase A belongs as follows:
ΔUAk＝max(ωAk1，ωAk2，ωAki，...，ωAkM)，
in the formula, ωAkiVoltage deviation amount of an ith acquisition point of a phase k user in the distribution area A, wherein M is a day acquisition point;
the processing module is configured to perform normalization processing on the high-loss distribution area technology cause probability vector to obtain a distribution area high-loss technology cause vector probability, wherein the calculation formula of the distribution area high-loss technology cause vector probability is as follows:
Figure GDA0003347217420000041
in the formula, E is the probability that three-phase imbalance leads to the high line loss of transformer platform district, and F is the probability that power factor is low and leads to the high line loss of transformer platform district, and G is the probability that the load factor is high and leads to the high line loss of transformer platform district, and H leads to the probability of the high line loss of transformer platform district for circuit rack problem.
In a third aspect, an electronic device is provided, comprising: the system comprises at least one processor and a memory communicatively connected with the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the steps of the high-loss platform technical cause diagnostic method according to any embodiment of the invention.
In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program includes program instructions, and when the program instructions are executed by a computer, the computer is caused to execute the steps of the method for diagnosing technical cause of high-loss distribution areas according to any embodiment of the present invention.
According to the method and the system for diagnosing the technical cause of the high-loss transformer area, when a high-line-loss event occurs in the transformer area, the probability of the high-line-loss of the transformer area is caused by respectively calculating three-phase imbalance, high load rate, low power factor and four line grid problems, and the probability of the generation of the four reasons is sequenced from large to small, so that power supply station personnel can carry out on-site investigation according to the probability, and finally which reason causes the high-line loss of the transformer area is determined, so that the pertinence of the on-site investigation of the power supply station is improved, a scientific and reasonable line loss treatment strategy is further formulated, and the management level of the line loss of the transformer area is improved.
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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 diagnosing a cause of a technical problem in a high-loss distribution area according to an embodiment of the present invention;
fig. 2 is a block diagram of a system for diagnosing a technical cause of a high-loss distribution room according to an embodiment of the present invention;
fig. 3 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 flow chart of a method for diagnosing a cause of a high-loss transformer area technology according to the present application is shown.
As shown in fig. 1, in step 1, acquired data of the station area and the user side are acquired.
In this embodiment, an additional electrical acquisition device is installed at the outlet side of the platform area, and the acquired data of the platform area and the user side include three-phase voltage (U)TA、UTB、UTC) Three-phase current (I)TA、ITB、ITC) Three-phase active power (P)TA、PTB、PTC) And three-phase reactive power (Q)TA、QTB、QTC) Transmitting to the intelligent fusion terminal or concentrator of the platform area in an RS485 communication mode, installing an electrical acquisition device at the user side of the platform area, and measuring the voltage (U) at the user sideFA、UFB、UFC) Data are transmitted to the district intelligent fusion terminal or the concentrator through HPLC communication, the collection interval can be set according to actual conditions, generally 15min is taken, and the district intelligent fusion terminal or the concentrator sends the district time sequence data to a front collection server and a storage server.
In step 2, when a high line loss event occurs in the transformer area, the probability of the high line loss of the transformer area caused by three-phase imbalance, high load rate, low power factor and line grid problems is calculated respectively.
In this embodiment, when a high line loss event occurs in a distribution room, the step of calculating the probability of the high line loss of the distribution room due to three-phase imbalance, high load rate, low power factor and line grid structure problem is specifically as follows:
step 2.1: and calculating the probability of high line loss of the transformer area due to three-phase imbalance, wherein the calculation formula is as follows:
Figure GDA0003347217420000065
in the formula, betaiAcquisition of Point load factor, α, for the ith station zoneiThe three-phase unbalance rate of the ith acquisition point of the transformer area is defined, tanh () is a hyperbolic tangent function, and M is a day acquisition point;
wherein the load factor beta of the ith acquisition point of the platform areaiThe calculation formula of (A) is as follows:
Figure GDA0003347217420000062
in the formula, PTA(i) For the ith acquisition point of the phase A of the distribution area, PTB(i) For station zone phase B ith acquisition point active power, PTC(i) Collecting point active power, Q, for the ith phase C of the transformer areaTA(i) The reactive power of the ith acquisition point of the phase A of the transformer area,QTB(i) collecting point reactive power Q for phase-B i of the transformer areaTC(i) Collecting point reactive power S for the ith phase C phase of the transformer areaNAnd allocating variable capacity for the station area.
The three-phase unbalance rate alpha of the ith acquisition point of the distribution roomiThe calculation formula of (A) is as follows:
Figure GDA0003347217420000063
in the formula ITA(i) Collecting point current for phase I of a regionTB(i) Collecting point current for stage zone phase ITC(i) For the ith acquisition point current of the C phase of the transformer area, max () is a maximum function, and min () is a minimum function.
Step 2.2: and calculating the probability of high line loss of the transformer area due to low power factor, wherein the calculation formula is as follows:
Figure GDA0003347217420000064
in the formula, thetaiThe power factor of the ith acquisition point of the transformer area is shown, tanh () is a hyperbolic tangent function, and M is a day acquisition point;
wherein the ith acquisition point power factor theta of the station areaiThe calculation formula of (A) is as follows:
Figure GDA0003347217420000071
in the formula, PTA(i) For the ith acquisition point of the phase A of the distribution area, PTB(i) For station zone phase B ith acquisition point active power, PTC(i) Collecting point active power, Q, for the ith phase C of the transformer areaTA(i) Collecting point reactive power Q for phase I of transformer areaTB(i) Collecting point reactive power Q for phase-B i of the transformer areaTC(i) And collecting reactive power of the ith collection point for the phase C of the transformer area.
Step 2.3: calculating the probability of high line loss of the transformer area due to high load rate, wherein the calculation formula is as follows:
Figure GDA0003347217420000072
in the formula, betaiThe load factor of the ith acquisition point of the transformer area is shown, tanh () is a hyperbolic tangent function, and M is a day acquisition point.
Step 2.4: calculating high line loss of platform area caused by line net rack problemIs calculated as follows:
Figure GDA0003347217420000073
in the formula, DA, DB and DC are respectively the number of users with the maximum value of the voltage deviation of the users belonging to the station area A, B, C phase being more than 10V, and delta UA、ΔUB、ΔUCThe maximum values of the voltage deviation values of users to which the station zone A, B, C belongs are respectively obtained, N is the number of users to which the station zone belongs, and tanh () is a hyperbolic tangent function;
the expression for calculating the maximum value of the voltage deviation amount of the user to which the phase A belongs is as follows: delta UA＝max(ΔUA1，ΔUA2，ΔUAk，...，ΔUA(N1)) In the formula, Δ UAThe maximum value of the voltage deviation of the user belonging to the phase A of the transformer area, N1 the number of the users belonging to the phase A of the transformer area, and Delta UAkThe maximum value of the voltage deviation value of the user k to which the phase A of the transformer area belongs is obtained, and max () is a maximum function; calculating the maximum value of the voltage deviation amount of the k users to which the phase A belongs as follows: delta UAk＝max(ωAk1，ωAk2，ωAki，...，ωAkM) In the formula, ωAkiVoltage deviation amount of an ith acquisition point of a phase k user in the distribution area A, wherein M is a day acquisition point; voltage deviation amount omega of ith acquisition point of phase k users in the distribution areaAkiThe calculation formula of (A) is as follows: omegaAki＝UT(k)(i)-UF(A) (k) (i) wherein UT(k) (i) collecting the voltage at the ith acquisition point for k users, UF(A) (k) (i) is the ith acquisition point voltage of the k users belonging to the phase A of the station area.
Similarly, the maximum value delta U of the voltage deviation value of the B, C-phase user is calculatedB、ΔUC。
In step 3, normalizing the high-loss distribution area technology cause probability vector to obtain a distribution area high-loss technology cause vector probability, wherein the calculation formula of the distribution area high-loss technology cause vector probability is as follows:
Figure GDA0003347217420000074
in the formula, E is the probability of high line loss of the transformer area caused by three-phase imbalance, F is the probability of high line loss of the transformer area caused by low power factor, and G is the probability of high conduction of the load factorAnd H is the probability of the high line loss of the transformer area caused by the problem of the line network frame.
In summary, the method of the present embodiment has the following technical effects:
1) when a high line loss event occurs in a transformer area, the probability of the high line loss of the transformer area is caused by respectively calculating three-phase imbalance, high load rate, low power factor and four reasons of line grid problems, and the probability generated by the four reasons is sequenced from large to small, so that power supply station personnel can carry out on-site investigation according to the probability, and finally determine which reason causes the high line loss of the transformer area, thereby improving the pertinence of on-site investigation of the power supply station, further formulating a scientific and reasonable line loss management strategy and improving the management level of the line loss of the transformer area.
2) On the basis of collecting electric data of a platform area outlet side and a user side, a probability formula of platform area high line loss caused by four conditions of three-phase unbalance, high load rate, low power factor and line grid structure problem is designed, the probability vector is normalized, operation and maintenance personnel carry out field investigation according to the probability of the four conditions, and the accuracy of platform area high loss treatment is further improved.
3) The probability of the platform area high loss technical cause is automatically analyzed without manual intervention, and the automation and intelligentization level of platform area high loss treatment is improved.
In some optional embodiments, after the diagnosis of the cause of the high line loss technology in the transformer area is completed, a work order for managing the high line loss in the transformer area is generated, and the content of the work order comprises a transformer area name, a power supply station name, a line loss rate, an abnormal date, a diagnosis and analysis result, operation and maintenance personnel, a mobile phone number, order sending time and filing time.
Referring to fig. 2, a block diagram of a high-loss platform-area technical cause diagnosis system according to the present application is shown.
As shown in fig. 2, the system 200 for diagnosing the technical cause of the high-loss transformer area includes an obtaining module 210, a calculating module 220, and a processing module 230.
The obtaining module 210 is configured to obtain collected data of the distribution room and the user side;
a computing module 220 configured to send data in the distribution areaWhen a high line loss event occurs, the probability of high line loss of a transformer area caused by three-phase imbalance, high load rate, low power factor and line grid structure problems is calculated respectively, wherein the method specifically comprises the following steps: and calculating the probability of high line loss of the transformer area due to three-phase imbalance, wherein the calculation formula is as follows:
Figure GDA0003347217420000081
in the formula, betaiAcquisition of Point load factor, α, for the ith station zoneiThe three-phase unbalance rate of the ith acquisition point of the transformer area is defined, tanh () is a hyperbolic tangent function, and M is a day acquisition point; and calculating the probability of high line loss of the transformer area due to low power factor, wherein the calculation formula is as follows:
Figure GDA0003347217420000082
in the formula, thetaiThe power factor of the ith acquisition point of the transformer area is shown, tanh () is a hyperbolic tangent function, and M is a day acquisition point; calculating the probability of high line loss of the transformer area due to high load rate, wherein the calculation formula is as follows:
Figure GDA0003347217420000091
in the formula, betaiThe load coefficient of the ith acquisition point of the transformer area is shown, tanh () is a hyperbolic tangent function, and M is a day acquisition point; calculating the probability of high line loss of the transformer area caused by the problem of the line network frame, wherein the calculation formula is as follows:
Figure GDA0003347217420000092
in the formula, DA, DB and DC are respectively the number of users with the maximum value of the voltage deviation of the users belonging to the station area A, B, C phase being more than 10V, and delta UA、ΔUB、ΔUCThe maximum values of the voltage deviation values of users to which the station zone A, B, C belongs are respectively obtained, N is the number of users to which the station zone belongs, and tanh () is a hyperbolic tangent function; the expression for calculating the maximum value of the voltage deviation amount of the user to which the phase A belongs is as follows: delta UA＝max(ΔUA1，ΔUA2，ΔUAk，...，ΔUA(N1)) In the formula, Δ UAThe maximum value of the voltage deviation of the user belonging to the phase A of the transformer area, N1 the number of the users belonging to the phase A of the transformer area, and Delta UAkThe maximum voltage deviation amount of the k users belonging to the phase A of the transformer areaThe value, max (), is a maximum function; calculating the maximum value of the voltage deviation amount of the k users to which the phase A belongs as follows: delta UAk＝max(ωAk1，ωAk2，ωAki，...，ωAkM) In the formula, ωAkiVoltage deviation amount of an ith acquisition point of a phase k user in the distribution area A, wherein M is a day acquisition point;
the processing module 230 is configured to perform normalization processing on the high-loss platform area technology cause probability vector, so as to obtain a high-loss platform area technology cause vector probability, where the calculation formula of the platform area high-loss technology cause vector probability is:
Figure GDA0003347217420000093
in the formula, E is the probability that three-phase imbalance leads to the high line loss of transformer platform district, and F is the probability that power factor is low and leads to the high line loss of transformer platform district, and G is the probability that the load factor is high and leads to the high line loss of transformer platform district, and H leads to the probability of the high line loss of transformer platform district for circuit rack problem.
It should be understood that the modules depicted in fig. 2 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. 2, and are not described again here.
In other embodiments, the present invention further provides a computer-readable storage medium, where the computer-readable storage medium stores computer-executable instructions, where the computer-executable instructions may execute the method for diagnosing the technical cause of the high-loss distribution area 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:
acquiring collected data of a platform area and a user side;
when a high line loss event occurs in a transformer area, calculating the probability of the high line loss of the transformer area caused by three-phase imbalance, high load rate, low power factor and line grid problems respectively;
and (4) carrying out normalization processing on the technical cause probability vectors of the high-loss transformer area so as to obtain the high-line-loss technical cause vector probability of the transformer area.
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 high-loss platform area technical cause diagnostic system, and the like. Further, the computer-readable storage medium may include high speed random access memory, and may also include 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 high loss stage area technology cause diagnostic 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. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 3, 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, such as the bus connection in fig. 3. 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 programs, instructions and modules stored in the memory 320, namely, the method for diagnosing the technical cause of the high-damage distribution area in the 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 high-loss platform technical cause diagnostic system. The output device 340 may include a display device such as a display screen.
The electronic 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 high-loss platform area technical cause diagnosis system, and is used for a client, and the electronic device 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:
acquiring collected data of a platform area and a user side;
when a high line loss event occurs in a transformer area, calculating the probability of the high line loss of the transformer area caused by three-phase imbalance, high load rate, low power factor and line grid problems respectively;
and (4) carrying out normalization processing on the technical cause probability vectors of the high-loss transformer area so as to obtain the high-line-loss technical cause vector probability of the transformer area.
The above-described embodiments of the apparatus 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 high-loss transformer area technical cause diagnosis method is characterized by comprising the following steps:
step 1: acquiring collected data of a platform area and a user side;
step 2: when a high line loss event occurs in a transformer area, the probability of the high line loss of the transformer area caused by three-phase imbalance, high load rate, low power factor and line grid frame problem is respectively calculated, wherein the method specifically comprises the following steps:
step 2.1: and calculating the probability of high line loss of the transformer area due to three-phase imbalance, wherein the calculation formula is as follows:
Figure FDA0003347217410000011
in the formula, ρiAcquisition of Point load factor, α, for the ith station zoneiThe three-phase unbalance rate of the ith acquisition point of the transformer area is defined, tanh () is a hyperbolic tangent function, and M is a day acquisition point;
step 2.2: and calculating the probability of high line loss of the transformer area due to low power factor, wherein the calculation formula is as follows:
Figure FDA0003347217410000012
in the formula, thetaiCollecting power factors of points for the ith of the transformer area;
step 2.3: calculating the probability of high line loss of the transformer area due to high load rate, wherein the calculation formula is as follows:
Figure FDA0003347217410000013
step 2.4: calculating the probability of high line loss of the transformer area caused by the problem of the line network frame, wherein the calculation formula is as follows:
Figure FDA0003347217410000014
in the formula, DA, DB and DC are respectively the number of users with the maximum value of the voltage deviation of the users belonging to the station area A, B, C phase being more than 10V, and delta UA、ΔUB、ΔUCThe maximum values of the voltage deviation values of users to which the station areas A, B, C belong are respectively, and N is the number of users to which the station areas belong;
the expression for calculating the maximum value of the voltage deviation amount of the user to which the phase A belongs is as follows:
ΔUA＝max(ΔUA1，ΔUA2，ΔUAk，...，ΔUA(N1))，
in the formula, N1 is the number of users belonging to the phase A of the distribution area, Δ UAkThe maximum value of the voltage deviation value of the user k to which the phase A of the transformer area belongs is obtained, and max () is a maximum function;
calculating the maximum value of the voltage deviation amount of the k users to which the phase A belongs as follows:
ΔUAk＝max(ωAk1，ωAk2，ωAki，...，ωAkM)，
in the formula, ωAkiCollecting the voltage deviation amount of the ith collection point for the phase k users in the platform area A;
and step 3: normalizing the technical cause probability vector of the high-loss distribution area to obtain the technical cause vector probability of the high-loss distribution area, wherein the calculation formula of the technical cause vector probability of the high-loss distribution area is as follows:
Figure FDA0003347217410000021
in the formula, E is the probability that three-phase imbalance leads to the high line loss of transformer platform district, and F is the probability that power factor is low and leads to the high line loss of transformer platform district, and G is the probability that the load factor is high and leads to the high line loss of transformer platform district, and H leads to the probability of the high line loss of transformer platform district for circuit rack problem.
2. The method for diagnosing the technical cause of the high-loss transformer area according to claim 1, wherein after the step 3, the method further comprises:
and generating a high line loss treatment work order of the transformer area, wherein the content of the high line loss treatment work order of the transformer area comprises a transformer area name, a power supply station name, a line loss rate, an abnormal date, a diagnosis and analysis result, operation and maintenance personnel, a mobile phone number, order dispatching time and filing time.
3. The method for diagnosing the technical cause of the high-loss transformer area according to claim 1, wherein the collected data comprises three-phase voltage (U) in step 1TA、UTB、UTC) Three-phase current (I)TA、ITB、ITC) Three-phase active power (P)TA、PTB、PTC) And three-phase reactive power (Q)TA、QTB、QTC)。
4. The method for diagnosing the technical cause of the high-loss transformer area according to claim 1, wherein in step 2, the ith acquisition point load factor β of the transformer area isiThe calculation formula of (A) is as follows:
Figure FDA0003347217410000022
in the formula, PTA(i) For the ith acquisition point of the phase A of the distribution area, PTB(i) For station zone phase B ith acquisition point active power, PTC(i) Collecting point active power, Q, for the ith phase C of the transformer areaTA(i) Collecting point reactive power Q for phase I of transformer areaTB(i) Collecting point reactive power Q for phase-B i of the transformer areaTC(i) Collecting point reactive power S for the ith phase C phase of the transformer areaNAnd allocating variable capacity for the station area.
5. The method for diagnosing the technical cause of the high-loss transformer area according to claim 1, wherein in the step 2, the ith acquisition point power factor theta of the transformer area isiThe calculation formula of (A) is as follows:
Figure FDA0003347217410000031
in the formula, PTA(i) For the ith acquisition point of the phase A of the distribution area, PTB(i) For station zone phase B ith acquisition point active power, PTC(i) Collecting point active power, Q, for the ith phase C of the transformer areaTA(l) Collecting point reactive power Q for phase I of transformer areaTB(i) Collecting point reactive power Q for phase-B i of the transformer areaTC(i) And collecting reactive power of the ith collection point for the phase C of the transformer area.
6. The method for diagnosing the technical cause of the high-loss transformer area according to claim 1, wherein in the step 2, the three-phase imbalance rate α of the ith acquisition point of the transformer area isiThe calculation formula of (A) is as follows:
Figure FDA0003347217410000032
in the formula ITA(i) Collecting point current for phase I of a regionTB(i) Collecting point current for stage zone phase ITC(i) For the ith acquisition point current of the C phase of the transformer area, max () is a maximum function, and min () is a minimum function.
7. The method for diagnosing the technical cause of the high-loss transformer area according to claim 1, wherein in the step 2, the voltage deviation amount ω of the ith acquisition point of the phase k users in the transformer area A is measuredAkiThe calculation formula of (A) is as follows:
ωAki＝UT(k)(i)-UF(A)(k)(i)，
in the formula of UT(k) (i) collecting the voltage at the ith acquisition point for k users, UF(A) (k) (i) is the ith acquisition point voltage of the k users belonging to the phase A of the station area.
8. A high-loss platform area technical cause diagnosis system is characterized by comprising:
the acquisition module is configured to acquire acquired data of the distribution room and the user side;
the calculation module is configured to respectively calculate the probability of the high line loss of the transformer area due to four reasons, namely three-phase imbalance, high load rate, low power factor and line grid structure problem, when the high line loss event occurs in the transformer area, wherein the calculation module specifically comprises:
and calculating the probability of high line loss of the transformer area due to three-phase imbalance, wherein the calculation formula is as follows:
Figure FDA0003347217410000033
in the formula, betaiAcquisition of Point load factor, α, for the ith station zoneiThe three-phase unbalance rate of the ith acquisition point of the transformer area is defined, tanh () is a hyperbolic tangent function, and M is a day acquisition point;
and calculating the probability of high line loss of the transformer area due to low power factor, wherein the calculation formula is as follows:
Figure FDA0003347217410000041
in the formula, thetaiCollecting power factors of points for the ith of the transformer area;
calculating the probability of high line loss of the transformer area due to high load rate, wherein the calculation formula is as follows:
Figure FDA0003347217410000042
calculating the probability of high line loss of the transformer area caused by the problem of the line network frame, wherein the calculation formula is as follows:
Figure FDA0003347217410000043
in the formula, DA, DB and DC are respectively the number of users with the maximum value of the voltage deviation of the users belonging to the station area A, B, C phase being more than 10V, and delta UA、ΔUB、ΔUCThe maximum values of the voltage deviation values of users to which the station areas A, B, C belong are respectively, and N is the number of users to which the station areas belong;
the expression for calculating the maximum value of the voltage deviation amount of the user to which the phase A belongs is as follows:
ΔUA＝max(ΔUA1，ΔUA2，ΔUAk，...，ΔUA(N1))，
in the formula, N1 is the number of users belonging to the phase A of the distribution area, Δ UAkThe maximum value of the voltage deviation value of the user k to which the phase A of the transformer area belongs is obtained, and max () is a maximum function;
calculating the maximum value of the voltage deviation amount of the k users to which the phase A belongs as follows:
ΔUAk＝max(ωAk1，ωAk2，ωAki，...，ωAkM)，
in the formula, ωAkiCollecting the voltage deviation amount of the ith collection point for the phase k users in the platform area A;
the processing module is configured to perform normalization processing on the high-loss distribution area technology cause probability vector to obtain a distribution area high-loss technology cause vector probability, wherein the calculation formula of the distribution area high-loss technology cause vector probability is as follows:
Figure FDA0003347217410000044
in the formula, E is the probability that three-phase imbalance leads to the high line loss of transformer platform district, and F is the probability that power factor is low and leads to the high line loss of transformer platform district, and G is the probability that the load factor is high and leads to the high line loss of transformer platform district, and H leads to the probability of the high line loss of transformer platform district for circuit rack problem.
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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