CN112907120A - Method, device, equipment and storage medium for evaluating electric circuit of power distribution system - Google Patents

Abstract

The invention provides an electric circuit evaluation method, device, equipment and storage medium for a power distribution system. The method includes: obtaining parameters of multiple evaluation indicators of each electric circuit for n electric circuits to be evaluated in the power distribution system For each evaluation index, the parameter value is processed in a consistent manner according to its numerical characteristics to obtain a consistent parameter value; for each evaluation index, its corresponding level is obtained according to its parameter value; according to the level of each evaluation index, Generate a variable weight function corresponding to each evaluation index; for each electrical circuit to be evaluated, obtain a comprehensive evaluation value of each electrical circuit according to the consistent parameter value of each evaluation index and its corresponding variable weight index; The comprehensive evaluation value of each electrical circuit is used to obtain the operation status of the entire power distribution system. In the present invention, the user can intuitively know the health status of the line, and the evaluation of the running status depends on the measured value, and the judgment is more objective and accurate.

Description

Electric circuit evaluation method, device, equipment and storage medium of power distribution system

technical field

The present invention relates to the field of fuel cell engines, and in particular, to a method, device, equipment and storage medium for evaluating an electrical circuit of a power distribution system.

Background technique

A power distribution system is a power network system that transforms voltage and directly distributes electrical energy to end users, which is composed of a variety of power distribution equipment (or components) and power distribution facilities. The working status of the power distribution system is related to the power consumption stability of users, so it is of great significance to monitor the working status of the power distribution system.

At present, the incoming end of the electrical line of the power distribution system is generally equipped with information acquisition modules such as voltage acquisition, current transformer, residual current transformer, temperature sensor, etc. Through the information acquisition module, the voltage, current, residual current, Temperature information, and then the collected voltage, current, residual current, temperature and other information in the circuit under test are uploaded to the cloud platform, and the platform can be analyzed by the set model for users to view.

However, the existing cloud platforms generally only provide simple measured values for users to view, and users cannot basically judge the line health status, configuration, comprehensive information, etc., and generally judge whether the parameters of the power distribution circuit are such as wire diameter, air switch, etc. Reasonable configuration can only be viewed through on-site verification, which is closely related to personnel experience and sense of responsibility, and cannot allow users to have an accurate and intuitive understanding of the operating status of electrical circuits.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide an electric circuit evaluation method, device, equipment and storage medium of a power distribution system, so as to improve the above problems.

The present invention adopts the following scheme:

An electrical circuit evaluation method for a power distribution system, comprising:

For the n electrical lines to be evaluated in the power distribution system, obtain the parameter values of multiple evaluation indexes of each electrical line;

The parameter values are unified for each evaluation index according to its numerical characteristics, and the consistent parameter values are obtained;

For each evaluation index, obtain its corresponding grade according to its parameter value;

According to the level of each evaluation index, a variable weight function corresponding to each evaluation index is generated;

For each electrical circuit to be evaluated, obtain the comprehensive evaluation value of each electrical circuit according to the consistent parameter value of each evaluation index and its corresponding variable weight index; and

According to the comprehensive evaluation value of each electrical circuit, the operation status of the entire power distribution system is obtained.

Preferably, the evaluation indicators include: rated current, leakage current, temperature, characteristic duration, historical current parameters, and voltage parameters.

Preferably, the numerical characteristics include extremely small, intermediate and interval types, then during the unification processing:

For a very small evaluation index, let the consistent parameter x'=1/x; where x is the obtained parameter value;

For intermediate evaluation indicators, let the uniform parameters:

For interval-type evaluation indicators, let the consistent parameter

Among them, [a, b] is the optimal interval of x; c=max{a-m, b-M}, M and m respectively evaluate the maximum and minimum values of the parameter value x of the index.

Preferably, for each evaluation index x _i , it corresponds to K levels P _k , 1≤k≤K, and each level P _k has a corresponding interval range [c ⁱ _k ,d ⁱ _k );

Then when x _i ∈ [ ^ci _k ,d ⁱ _k ), it is judged that x _i belongs to the level P _k .

Preferably, the variable weight function is set as a sigmoid distribution function.

Preferably, the functional form of the variable weight function is:

且w_i(g)＝0.5,1≤i≤m。in,

And w _i (g)=0.5, 1≤i≤m.

Preferably, it also includes:

According to the parameter value of the evaluation index and the configured warning information, the operation of each electrical circuit is judged, and the corresponding color status indicator is displayed according to the judgment result.

Preferably, the comprehensive evaluation value of each electrical circuit is:

The embodiment of the present invention also provides an electrical circuit evaluation device of a power distribution system, which includes:

The parameter value obtaining unit is used to obtain the parameter values of multiple evaluation indexes of each electrical line for the n electrical lines to be evaluated in the power distribution system;

The unification processing unit is used to unify the parameter value of each evaluation index according to its numerical characteristics, so as to obtain the unanimous parameter value;

The grade obtaining unit is used to obtain the corresponding grade for each evaluation index according to its parameter value;

The variable weight unit is used to generate a variable weight function corresponding to each evaluation index according to the level of each evaluation index;

The comprehensive evaluation unit is used to obtain the comprehensive evaluation value of each electrical circuit according to the consistent parameter value of each evaluation index and its corresponding variable weight index for each electrical circuit to be evaluated; and

The operation state obtaining unit is used to obtain the operation state of the entire power distribution system according to the comprehensive evaluation value of each electrical circuit.

An embodiment of the present invention also provides an electrical circuit evaluation device for a power distribution system, which includes a memory and a processor, where a computer program is stored in the memory, and the computer program can be executed by the processor to achieve the above-mentioned A method for evaluating electrical circuits of electrical distribution systems.

An embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program, and the computer program can be executed by a processor of a device where the computer-readable storage medium is located, so as to realize the above-mentioned power distribution system. Methods of evaluating electrical circuits.

To sum up, in the above-mentioned embodiment, by constructing the n electrical lines to be evaluated in the power distribution system according to their consistent parameters, grades and variable weight functions, the n electrical lines of the entire power distribution system are constructed. Comprehensive processing model, so that the operating status of the entire power distribution system can be intuitively obtained according to the collected parameter values, so that the user can intuitively know its line health status, configuration, comprehensive information, etc., and the evaluation of the entire operating status depends on the measured values. It does not rely on the subjective judgment of the staff, and the judgment is more objective and accurate.

Description of drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic flowchart of a method for evaluating an electrical circuit of a power distribution system according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of an electric circuit evaluation device of a power distribution system according to a second embodiment of the present invention.

Detailed ways

In order to make the purposes, 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 accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Referring to FIG. 1 , the first embodiment of the present invention provides an electrical circuit evaluation method of a power distribution system, which can be performed by an electrical circuit evaluation device (hereinafter referred to as an evaluation device) of a power distribution system. The first or more processors in the device execute the following steps:

S101 , for the n electrical lines to be evaluated in the power distribution system, obtain parameter values of multiple evaluation indexes of each electrical line.

In this embodiment, the evaluation device may be an intelligent gateway located at the edge or a server located in the cloud, etc., which is not specifically limited in the present invention.

Wherein, for each power distribution system, it is generally composed of multiple electrical lines. In this embodiment, for each electrical line, information such as voltage collection, current transformer, residual current transformer, temperature sensor and other information can be collected. The acquisition module is used to obtain the parameter value of the corresponding evaluation index.

Among them, corresponding to the information acquisition module, the evaluation indicators include: rated current, leakage current, temperature, characteristic duration, historical current parameters, and voltage parameters. Of course, according to actual needs, more or less evaluation indicators can be selected, and these solutions are all within the protection scope of the present invention.

S102 , performing uniform processing on the parameter values of each evaluation index according to its numerical characteristics to obtain uniform parameter values.

In this embodiment, since the numerical values of different evaluation indexes are very different, it is necessary to perform a uniform processing (eg, maximization processing) on them during evaluation to obtain uniform parameter values.

In this embodiment, specifically,

The numerical characteristics include extremely small, intermediate and interval types, then when the uniform processing is performed:

For a very small evaluation index, the unification parameter x'=1/x; where x is the actual parameter value obtained.

Among them, the extremely small evaluation index includes line leakage current and the like.

For intermediate evaluation indicators, let the uniform parameters:

Among them, the evaluation index of the intermediate type includes the line temperature and so on.

For interval-type evaluation indicators, let the consistent parameter

Among them, [a, b] is the optimal interval of x; c=max{a-m, b-M}, M and m evaluate the maximum and minimum values of the parameter value x of the index X respectively.

Among them, the interval-type evaluation index includes line voltage and the like.

S103, for each evaluation index, obtain its corresponding grade according to its parameter value.

In this embodiment, each evaluation index X _i can be divided into K levels P ₁ , P ₂ , P _k , and P _K (K>1). And for each P _k contains a [a ⁱ _k , b ⁱ _k ), and b ⁱ _k >a ⁱ _k (i=1, 2..., m;), that is, when the parameter value x _i of the evaluation index X _i When ∈[a ⁱ _k , b ⁱ _k ), the evaluation index X _i belongs to the level P _k .

S104, according to the level of each evaluation index, generate a variable weight function corresponding to each evaluation index.

In this embodiment, different evaluation indexes have different influences on the final evaluation result, so different weights need to be set for different evaluation indexes. In this embodiment, the effect of setting the evaluation index X _i on the evaluation increases as the level P _k increases, so the variable weight function of the evaluation index X _i is set as the sigmoid distribution function:

且w_i(g)＝0.5,1≤i≤m。in,

And w _i (g)=0.5, 1≤i≤m.

S105 , for each electrical circuit to be evaluated, obtain a comprehensive evaluation value of each electrical circuit according to the consistent parameter value of each evaluation index and its corresponding variable weight index.

S106, according to the comprehensive evaluation value of each electrical circuit, obtain the operation status of the entire power distribution system.

In this embodiment, based on the above, the comprehensive evaluation value of n electrical circuits is:

In this way, by sorting the comprehensive evaluation values of the n electrical lines, it can be seen that the operation status of the entire power distribution system can be known at a glance.

To sum up, in this embodiment, a comprehensive processing model of n electrical lines of the entire power distribution system is constructed and obtained by using the n electrical lines to be evaluated in the power distribution system according to their uniform parameters, grades and variable weight functions. , so that the operating status of the entire power distribution system can be intuitively obtained according to the collected parameter values, so that the user can intuitively know its line health status, configuration, comprehensive information, etc., and the evaluation of the entire operating status depends on the measured values. The subjective judgment of the staff is more objective and accurate.

Preferably, it also includes:

According to the parameter value of the evaluation index and the configured warning information, the operation of each electrical circuit is judged, and the corresponding color status indicator is displayed according to the judgment result.

In this embodiment, it is defined that UA, UB, and UC are the measured voltages of the electrical line respectively, Un is the line standard voltage, and the set of voltage coefficients is {a1, a2, a3....an}, where ai≠aj, i<j;

Tem is the measured temperature of the electrical circuit, Temh is the ambient temperature, Temz is the maximum allowable working temperature of the cable, the standard ambient temperature Temhn is the thermal temperature, and the set of temperature parameter coefficients is {d1,d2,d3....dn}, where di≠dj, i<j;

Ib is the current measured value, In is the line current setting value or the rated current value of the distribution circuit control element, Iz is the maximum allowable temperature current carrying capacity of the cable at the standard ambient temperature Temhn, Isz is the maximum allowable working temperature load capacity of the cable at the current ambient temperature flow, Izz is the current carrying capacity that does not cause the line temperature rise; S is the wire diameter, and the set of S is {2.5, 4, 6, 10....500}; when S≥6, Izz _-2 is the ratio monitoring The line diameter is two grades smaller than the current carrying capacity of the line diameter; the current parameter coefficient set is {b1,b2,b3....bn}, where bi≠bj, i<j;

I△s is the measured residual current, I△n is the line standard residual current; the set of residual current parameter coefficients is {c1,c2,c3....cn}, where ci≠cj, i<j;

Tim is time, and the set of time parameter coefficients is {e1,e2,e3....en}, where ei≠ej, i<j;

The current and temperature settings are as follows:

1. When Ib<b1*In, Ib<b2*Isz, and Tem<d1*Temh, it is judged that the line temperature is normal, the current is normal, it is in a healthy state, and the display is green;

2. When b1*In≤Ib<b3*In, Ib<b4*Izz, and Tem<d2*Temh, it is judged that the line temperature is normal but the selection of the control components of the distribution circuit is too small, and the display is blue, which acts as a reminder;

3. When b3*In≤IB＜b5*In, Ib＜b6*Izz, and Tem<d3*Temh, Tim≥e1(In≤63A) or Tim≥e2(In＞63A) does not trip, judge the line temperature It is normal but the selection of the control components of the distribution circuit is too small to be protected, and it is displayed in yellow, which acts as a preliminary alarm;

4. When b5*In≤IB＜b7*In, Ib＜b8*Izz and Tem＜d4*Temh, Tim＜e1(In≤63A) or Tim＜e2(In＞63b) trip, judge that the line temperature is normal but If the selection of the control components of the power distribution circuit is too small, the overload trip will be caused, and the display will be orange;

5. When b7*In≤IB＜b9*In, Ib＜b10*Izz and Tem＜d5*Temh, Tim≥e1(In≤63A) or Tim≥e2(In＞63A) does not trip, judge that the line temperature is normal However, the protection of the control element of the power distribution circuit fails, and the display is red;

6. When b9*In≤IB, Ib＜b11*Izz, and Tem<d6*Temh, e3＜Tim＜e4(In≤32A) or e3＜Tim＜e5(In≤A) trip, judge that the line temperature is normal However, the selection of the control components of the power distribution circuit is seriously too small, resulting in overload tripping, which is displayed in red;

7. When b12*In≤IB, Ib<b13*Izz and Tem<d7*Temh, e3<Tim<e4 (In≤32A) or e3<Tim<e5 (In≤32A) does not trip, it is judged as a judgment line If the set value or the selection of the control components of the distribution circuit is too small and the protection of the control components of the distribution circuit is invalid, it will be displayed in red, which acts as an alarm;

8. When Ib≥b13*In, when Tem-Temh>d8*Temh℃ of the three-phase line, it indicates that the distribution line is overheated due to the mismatch between the wire diameter and the load, and the display is orange, which plays an important alarm function;

9. When Ib≥b14*In, when Tem-Temh>d9*Temh°C of the three-phase line, it indicates that the distribution line is overheated due to the mismatch between the wire diameter and the load, and the display is orange, which plays an important alarm function;

10. When Ib＜b15*Izz _-2 , and the phase line Tem-Temh＞d10*Temh℃, the remaining lines Tem-Temh＞d10*Temh℃, it is judged that the line is overheated due to the loose wiring at the lower end of the control element. Displayed in red;

11. When the mutation of Ib is greater than b16*In, and the mutation of voltage UA, UB, and UC is smaller than a1*Un, it is judged that there may be a short circuit in the line, and it is displayed in red;

12. Ib runs smoothly, and when the voltages UA, UB, and UC are less than a1*Un, it is judged that the circuit is artificially disconnected; when the voltages and voltages UA, UB, and UC of other equipment that have a affiliation with the equipment are less than a1*Un, it is judged as a city Power outage, displayed in blue.

13. When b16*I _zz-2 ≤Ib＜b1*In, and Tem-Temh＞d11*Temh℃, it is judged that the circuit wiring is too small and overheating occurs, and the display is yellow;

14. When Ibb＜b16* _Izz-2 and Tem-Temh＞d12*Temh℃, it is judged that the wiring is too small and overheating occurs, and the display is yellow;

15. When the three-phase current Iab+Ibb+Icb≠In, it is judged that there is leakage or series connection in the line, and it needs to be checked and displayed in red, which acts as an alarm.

in:

The voltage settings are as follows:

1. Ui={Ua,Ub,Uc|}<a1*Un, when e5<Tim<e6, it is judged that the voltage is interrupted for a short time; when e7<Tim, it is judged that the line voltage is interrupted;

2. When Ua/Ub/Uc＜a2*U, e8＜Tim＜e9, judge short-time phase loss; when e10＜Tim, judge line phase loss;

3. When a2*U≤Ua/Ub/Uc<a3*U, when e11<Tim<e12, it is judged that the line is under-voltage for a short time; when e13<Tim, it is judged that the line is under-voltage;

4. When a3*U≤Ua/Ub/Uc＜a4*U, it is judged that the line voltage is normal;

5. a4*U≤Ua/Ub/Uc, when e14＜Tim＜e15, judge the line overvoltage for a short time; when e17＜Tim, judge the line overvoltage;

6. When the measured voltage of any one phase is U, and the other two phases are a5*U, it is judged that there is a wrong line connection;

The residual current is set to the following warning methods:

1. When I△s<c1*I△n, the line is judged to be healthy;

2. When c1*I△n≤I△s<c2*I△n, it is judged that the circuit may have leakage;

3. When c2*I△n≤I△s<c3*I△n, Tim>e18, Ui={Ua,Ub,Uc|}>a1*Un, it is judged that the circuit has leakage and the control element fails;

4. When c2*I△n≤I△s<c3*I△n, Tim>e18, Ui={Ua,Ub,Uc|}<a1*Un, it is judged that the circuit has leakage and the control element is tripped;

5. When c3*I△n≤I△s<c4*I△n, Tim>e19(e19<e18), Ui={Ua,Ub,Uc|}>a1*Un, it is judged that there is leakage in the circuit and the control element invalid;

6. When c3*I△n≤I△s<c4*I△n, Tim>e19(e19<e18), Ui={Ua,Ub,Uc|}<a1*Un, it is judged that there is leakage in the circuit and the control element invalid;

7. When c5*I△n≤I△s, Ui={Ua,Ub,Uc|}a1*Un or Iab/Ibb/Icb<I△s, it is judged that the line is connected in series and the residual current is generated;

8. When c5*I△n≤I△s=Iab/Ibb/Icb, it is judged that the line generates residual current because the zero line of the lower line is not connected to this line;

9. When c5*I△n≤I△s, Ui={Ua,Ub,Uc|}<a1*Un, it is judged that the line exists because there is a line

connected in series to generate residual current;

When c6*In≤I△s[c6>b15], Ui={Ua,Ub,Uc|}<a1*Un, it is judged that the line generates residual current due to ground fault, and it has tripped protection;

Referring to FIG. 2, the second embodiment of the present invention also provides an electrical circuit evaluation device for a power distribution system, which includes:

The parameter value obtaining unit 210 is configured to obtain the parameter values of multiple evaluation indexes of each electrical line for the n electrical lines to be evaluated in the power distribution system;

The unification processing unit 220 is configured to perform unification processing on the parameter value of each evaluation index according to its numerical characteristic, so as to obtain the unification parameter value;

The grade obtaining unit 230 is used for obtaining the corresponding grade for each evaluation index according to its parameter value;

A variable weight unit 240, configured to generate a variable weight function corresponding to each evaluation index according to the level of each evaluation index;

The comprehensive evaluation unit 250 is used to obtain the comprehensive evaluation value of each electrical circuit according to the consistent parameter value of each evaluation index and its corresponding variable weight index for each electrical circuit to be evaluated; and

The operating state obtaining unit 260 is configured to obtain the operating state of the entire power distribution system according to the comprehensive evaluation value of each electrical circuit.

A third embodiment of the present invention also provides an electrical circuit evaluation device for a power distribution system, which includes a memory and a processor, where a computer program is stored in the memory, and the computer program can be executed by the processor to achieve The electrical circuit evaluation method of the power distribution system as described above.

The fourth embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program, and the computer program can be executed by a processor of a device where the computer-readable storage medium is located, so as to realize the above-mentioned power distribution Methods for evaluating electrical wiring of systems.

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may also be implemented in other manners. The apparatus and method embodiments described above are merely illustrative, for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention, function and operation. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code that contains one or more functions for implementing the specified logical function(s) executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It is also noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented in dedicated hardware-based systems that perform the specified functions or actions , or can be implemented in a combination of dedicated hardware and computer instructions.

In addition, each functional module in each embodiment of the present invention may be integrated to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, an electronic device, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes . It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. An electrical line evaluation method for a power distribution system, comprising:

acquiring parameter values of a plurality of evaluation indexes of n electric lines to be evaluated in a power distribution system;

carrying out consistency processing on the parameter values of each evaluation index according to the numerical characteristics of the evaluation index to obtain consistent parameter values;

for each evaluation index, acquiring a corresponding grade according to the parameter value of the evaluation index;

generating a variable weight function corresponding to each evaluation index according to the grade of each evaluation index;

for each electric line to be evaluated, obtaining a comprehensive evaluation value of each electric line according to the consistence parameter value of each evaluation index and the variable weight index corresponding to the consistence parameter value; and

and acquiring the operation condition of the whole power distribution system according to the comprehensive evaluation value of each electric line.

2. The electrical line evaluation method of an electrical distribution system according to claim 1, wherein the evaluation index includes: rated current, leakage current, temperature, characteristic duration, historical current parameters, voltage parameters.

3. The electrical line evaluation method of an electrical distribution system according to claim 1,

the numerical characteristics include an extremely small type, an intermediate type, and a block type, and when the matching process is performed:

for an extremely small evaluation index, the matching parameter x' is 1/x; wherein x is the obtained parameter value;

for the evaluation index of the intermediate type, the consistency parameter is made as follows:

for the evaluation index of the interval type, the parameter is made consistent

Wherein [ a, b ] is the optimal interval of x; c is max { a-M, b-M }, M and M respectively evaluate the maximum value and the minimum value of the parameter value x of the index.

4. The electrical line evaluation method of an electrical distribution system according to claim 1, wherein for each evaluation index x_iCorresponding to K levels P_kK is more than or equal to 1 and less than or equal to K, and each grade P_kHas a corresponding interval range [ c ]ⁱ _k,dⁱ _k)；

When x is_i∈[cⁱ _k,dⁱ _k) When it is, x is judged_iBelonging to class P_k。

5. The electrical line evaluation method of a power distribution system according to claim 4, wherein the weight-varying function is set to an S-shaped distribution function; the function form of the variable weight function is as follows:

wherein,

and w_i(g)＝0.5,1≤i≤m。

6. The electrical line evaluation method of an electrical distribution system according to claim 5, wherein the integrated evaluation value of each electrical line is:

7. the electrical line evaluation method of an electrical distribution system according to claim 1, further comprising:

and judging the running condition of each electric circuit according to the parameter value of the evaluation index and the configured early warning information, and displaying the state indicator lamp with the corresponding color according to the judgment result.

8. An electrical line evaluation apparatus for an electrical distribution system, comprising:

the system comprises a parameter value acquisition unit, a parameter value acquisition unit and a parameter value evaluation unit, wherein the parameter value acquisition unit is used for acquiring parameter values of a plurality of evaluation indexes of each electric circuit for n electric circuits to be evaluated in the power distribution system;

the consistency processing unit is used for carrying out consistency processing on the parameter values of each evaluation index according to the numerical characteristics of the evaluation index to obtain consistency parameter values;

the grade acquisition unit is used for acquiring the corresponding grade of each evaluation index according to the parameter value of the evaluation index;

a variable weight unit for generating a variable weight function corresponding to each evaluation index according to the grade of each evaluation index;

the comprehensive evaluation unit is used for obtaining a comprehensive evaluation value of each electric line according to the consistency parameter value of each evaluation index and the corresponding variable weight index of each electric line to be evaluated; and

and the operation condition acquisition unit is used for acquiring the operation condition of the whole power distribution system according to the comprehensive evaluation value of each electric line.

9. An electrical line evaluation device of an electrical distribution system, comprising a memory and a processor, the memory having stored therein a computer program executable by the processor to implement the electrical line evaluation method of an electrical distribution system according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that a computer program is stored, which computer program is executable by a processor of a device in which the computer-readable storage medium is located, to implement the method for evaluating an electrical line of a power distribution system according to any one of claims 1 to 7.

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