A secondary circuit practical operation assessment system and method for a substation

Abstract

The present invention discloses a practical operation assessment system and method for the secondary circuit of a substation. After a fault is given in the digital power grid, various operations that can be included in the training scenario are carried out one by one in the digital power grid. According to the degree of change in the electrical quantities generated by each operation in the digital power grid and based on the Gaussian fuzzy algorithm, dynamic scoring is performed. Then, the trainee conducts practical operations on the components in the secondary circuit of the substation according to the training fault, forming an operation set for solving the training fault. Based on the scores of each operation, the final score of the training assessment is integrated. The present invention can truly evaluate the ability of the trainee to eliminate faults.

Description

Technical Field

[0001] The present invention relates to the technical field of operation and maintenance of power systems, and in particular to a practical operation assessment system and method for secondary circuits of a substation. Background Art

[0002] The secondary system of a substation is a huge and complex system. Among the faults or abnormalities that occur during the operation of the substation, more than 70% of the accidents are caused by faults or abnormalities in the secondary system. And it often happens that due to the unfamiliarity of operation and maintenance personnel with the principle logic of the secondary system, misoperations occur, resulting in the expansion of the system fault range. The composition and wiring method of the secondary circuit of the substation are also knowledge that every secondary operation and maintenance personnel of the substation must master. At the same time, the ability to identify diagrams and check lines of the secondary circuit is a skill that every secondary operation and maintenance employee of the substation must master.

[0003] In order to better serve the training work of relay protection professionals and thus promote the improvement of the overall technical skill level of professionals such as relay protection in the company, it is necessary to use relay protection and secondary circuit simulation practical training tools to train relay protection professionals. During the training process, the assessment of the training effect of relay protection professionals is a key link. When setting questions, a fault of a preset digital power grid is often used, and the trainees use the secondary circuit simulation practical training tool to eliminate the fault, and the score is given by analyzing the actual operations performed by the trainees in eliminating the fault.

[0004] In the existing training assessment, methods based on scoring templates are often used, such as methods based on Markov chains for scoring. These methods need to pre-statically assign scores. However, in the secondary circuit simulation practical training, this involves the problem of how to score all possible operations of the trainees in the training scenario. In particular, for these all possible operations, depending on different faults of the digital power grid, their effects in eliminating each fault are different, and scores cannot be pre-statically assigned. In addition, the method based on the scoring template has high requirements for the setting of the template. It is necessary to preset the operations that may be included in solving the set faults. However, the operations of the trainees are arbitrary (the number of operations included in the training scenario is N, and N can be 1,000 or 10,000). Therefore, the scoring template can only give the operations that are most likely to be adopted by the trainees. Summary of the Invention

[0005] The purpose of the present invention is to provide a practical operation assessment system and method for secondary circuits of a substation. After a fault is given by the digital power grid, various operations that can be included in the training scenario are one by one operated in the digital power grid, and according to the degree of change of the electrical quantities generated by each operation in the digital power grid, and based on the Gaussian fuzzy algorithm, dynamic scoring is performed, so as to truly evaluate the ability of the trainees to eliminate faults.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] The present invention provides a practical operation assessment system for the secondary circuit of a substation, including:

[0008] A training scenario module for simulating the practical operation training scenario of the secondary circuit of the substation and generating a set A of all possible operations p ;

[0009] An electrical quantity calculation module for calculating the electrical quantities of each component in the primary circuit of the substation after a fault occurs and after an operation

[0010] An operation module for performing operations in the practical operation training scenario according to the issued training fault to form a set A of operations for solving the training fault ps ;

[0011] An operation scoring module for scoring all operations in set A p based on the change in electrical quantity of the component after a training fault occurs, to obtain a set A with scores pv ;

[0012] An evaluation module for screening out the scores of each operation in set A pv from the set A with scores and integrating them to obtain the final score of the training assessment ps .

[0013] Furthermore, the training scenario module is specifically used for

[0014] [[ID=�6]]Using the relay protection devices and secondary circuits of intervals such as lines, buses, and bus couplers in a 220kV conventional substation as the simulation practical operation objects to construct a practical operation training scenario for the secondary circuit of the substation;

[0015] The wiring form in the substation is as follows:

[0016] 220kV uses a double bus; 110kV uses a double bus; 10kV uses a single bus sectionalization; and includes 2 main transformers;

[0017] The practical operation training scenario includes:

[0018] 1 typical 220kV line interval, including the secondary circuit and primary equipment of 1 set of line protection, operation box, and circuit breaker operating mechanism;

[0019] 1 220kV bus coupler interval, including the secondary circuit and primary equipment of 1 set of bus coupler protection, operation box, and circuit breaker operating mechanism circuit;

[0020] 1 220kV bus interval, including a set of bus protection circuit and primary equipment;

[0021] And,

[0022] Test instruments, including a relay protection tester and a multimeter.

[0023] Furthermore, the training scenario module is specifically used for,

[0024] generating a set A of all possible operations in the practical training scenario p , including the practice of secondary circuit faults and the practice of various protection device tests.

[0025] Furthermore, the electrical quantity calculation module is specifically used for,

[0026] using an electromagnetic transient calculation model to calculate the electrical quantities of each component in the primary circuit of the substation in the practical training scenario.

[0027] Furthermore, the electrical quantity calculation module is specifically used for,

[0028] simulating and calculating the electrical quantities of components in the primary circuit in the following manner:

[0029] G AA u A (t) = i A (t) - I A -G AB u B (t);

[0030] wherein, the primary circuit network of the substation is divided into block A composed of nodes with unknown voltages and block B composed of nodes with known voltages, G AA is the node conductance matrix formed by the equivalent calculation resistances between the nodes of the unknown block A at time t, G AB is the node conductance matrix formed by the equivalent resistances between the nodes of the unknown block A and the known block B nodes at time t, u A (t) is the voltage of the unknown block A nodes, u B (t) is the voltage of the known block B nodes, i A (t) is the current of the unknown block A nodes, I A is the equivalent current source column vector calculated from the voltage and current values of the unknown block A nodes at time (t - Δt), and Δt is the simulation calculation step size.

[0031] Furthermore, the electrical quantity calculation module is specifically used for,

[0032] after receiving the faults specified by the training, performing iterative calculations on the electrical quantities of each component in the primary circuit of the substation in the practical training scenario until a preset number N1 is reached;

[0033] and, after starting the operation, performing iterative calculations on the electrical quantities of each component in the primary circuit of the substation in the practical training scenario until a preset number N2 is reached.

[0034] Further, the operation scoring module is specifically configured to

[0035] score the operation by using the change amount of the bus voltage amplitude.

[0036] Further, the operation scoring module is specifically configured to

[0037] After receiving the faults specified in the training, obtain the calculation results of the electrical quantity calculation module for the cyclic iterative calculation of the bus voltage, and record the maximum value V0 of the bus voltage amplitude;

[0038] For the operation element a in the operation set A p after starting the operation element a, obtain the calculation results of the electrical quantity calculation module for the cyclic iterative calculation of the bus voltage, and record the maximum value V of the bus voltage amplitude am ;

[0039] Take the change amount V am -V0 of the bus voltage amplitude as x i , and calculate the score of the operation a based on the Gaussian fuzzy algorithm,

[0040] The score is calculated based on the Gaussian fuzzy algorithm as follows:

[0041]

[0042]

[0043] where x i is the change amount of the electrical quantity, and P(x i ) is the operation score when the change amount of the electrical quantity is x i , and σ is the variance;

[0044] For each operation element in the operation set A p , calculate the operation score based on the change amount of the bus voltage amplitude after the operation by using the Gaussian fuzzy algorithm, and finally obtain the operation set A with scores pv .

[0045] Further, the evaluation module is specifically configured to

[0046] According to each operation element of the operation set A ps , obtain the deduction scores of each operation element in the operation set A with scores in the entire training scenario pv ;

[0047] Add up the deduction scores of all operation elements in the operation set A ps , and use 100 points to deduct the obtained accumulated value to get the final score of the training assessment.

[0048] The present invention also provides a substation secondary circuit practical operation assessment method, which uses the above-mentioned substation secondary circuit practical operation assessment system to conduct a secondary circuit practical operation assessment on trainees. The method includes:

[0049] Send training faults to the secondary circuit practical training scenario built by the substation secondary circuit practical assessment system;

[0050] Calculate the electrical quantities of each component in the substation secondary circuit practical training scenario after a fault occurs, and calculate all possible operations in the training scenario one by one, and calculate the electrical quantities of each component after the operation occurs;

[0051] Score the operation based on the change in the electrical quantity of the component after the operation occurs, and obtain the scored set A pv ;

[0052] Perform actual operations in the practical training scenario based on the training failures to form an operation set A to solve the training failures ps ;

[0053] From the scored set A pv Filter out the operation set A ps The scores of each operation are integrated to obtain the final score of the training assessment.

[0054] The beneficial effects of the present invention are:

[0055] (1) The present invention uses the changes in electrical quantities caused by a student's practical operation to judge the score of this step of the operation, and uses the graphics generated by the Gaussian fuzzy algorithm to make up the difference of 100 points as a deduction for the practical operation, which overcomes the deficiency of other scoring algorithms that require static scores for all possible operations in advance.

[0056] (2) The present invention allows trainees to perform any number of practical exercises in troubleshooting, and these exercises are scored deductibly, thereby truly evaluating the trainees' ability to troubleshoot. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a flow chart for calculating electrical quantities in an embodiment of the present invention;

[0058] Figure 2 is the probability distribution diagram of Gaussian blur algorithm;

[0059] Figure 3 This is a probability distribution diagram of point deduction based on the Gaussian fuzzy algorithm in an embodiment of the present invention. DETAILED DESCRIPTION

[0060] The present invention will be further described below. The following examples are only used to more clearly illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention.

[0061] Example 1

[0062] This embodiment proposes a practical operation assessment system for the secondary circuit of a substation, including:

[0063] A training scenario module, used to simulate the practical operation training scenario of the secondary circuit of the substation and generate a set A of all possible operations p ;

[0064] An electrical quantity calculation module, used to calculate the electrical quantities of each component in the primary circuit of the substation after a fault occurs and after an operation

[0065] An operation module, used to perform operations in the practical operation training scenario according to the issued training fault to form a set A of operations to solve the training fault ps ;

[0066] An operation scoring module, used to score all operations in set A p based on the change in electrical quantity of the components after a training fault occurs, to obtain a set A with scores pv ;

[0067] An evaluation module, used to screen out the scores of each operation in set A pv from the set A with scores and integrate them to obtain the final score of the training assessment ps In the embodiment of the present invention, the training scenario module is specifically used for

[0068] using the relay protection devices and secondary circuits of typical 220kV conventional substation lines, buses, bus couplers, etc. as the simulation practical operation objects to construct a practical operation training scenario for the secondary circuit of the substation

[0069] In the embodiment of the present invention, the wiring form of the constructed practical substation is as follows:

[0070] In the embodiment of the present invention, the wiring form of the constructed practical substation is as follows:

[0071] (1) 220kV uses a double busbar;

[0072] (2) 110kV uses a double busbar;

[0073] (3) 10kV uses a single busbar sectionalized;

[0074] (4) 2 main transformers;

[0075] Model the primary and secondary equipment scenarios of the above intervals, and the modeling scope includes the following content:

[0076] (1) 1 typical 220kV line interval, including the secondary circuit and primary equipment of 1 set of line protection, operation box, and circuit breaker operating mechanism

[0077] (2) One 220kV bus coupler bay, including one set of bus coupler protection, operating box, breaker operating mechanism circuit and primary equipment.

[0078] (3) One 220kV bus bay, including one set of bus protection circuit and primary equipment.

[0079] (4) Test instruments, including relay protection tester and multimeter.

[0080] Based on the constructed substation practical training scenario, generate the set A of all possible operations p , including the practical operation of secondary circuit faults, that is, the common abnormal solutions for components such as circuit terminals, cables, relays, contacts, etc., such as measuring and analyzing with a multimeter on the terminals behind the drawings and panels and troubleshooting; and the practical operation of various protection device tests, such as using a simulated practical protection tester to simulate the test process of the protection device according to the test procedure.

[0081] It should be noted that after each trainee enters the practical training scenario, the examiner will specify a certain fault through the digital power grid, and the substation secondary circuit practical assessment system will pop up a corresponding warning window.

[0082] In the embodiment of the present invention, the electrical quantity calculation module is specifically used for

[0083] Using the electromagnetic transient calculation model to calculate the electrical quantities of each component in the primary circuit of the substation in the practical training scenario.

[0084] The electromagnetic transient calculation is solved in the phase space, and the voltage or current values of each component are solved at discrete time points Δt, 2Δt,..., nΔt. Based on the equivalent calculation circuit of the component, the transient calculation of the network is transformed into the calculation of a DC resistance network at each discrete time point.

[0085] A network with n nodes can be represented by a node equation set formed by n linear algebraic equations:

[0086] Gu(t) = i(t) - I(1)

[0087] In the formula, G is the node conductance matrix formed by the equivalent calculation resistances in the network at time t; u(t) is the node voltage column vector; i(t) is the node current column vector; I is the equivalent current source column vector calculated from the voltage and current values at time (t - Δt).

[0088] Divide the network into two blocks A and B, where block A represents the nodes with unknown voltages and block B represents the nodes with known voltages, then the unknown voltage is obtained by the following formula:

[0089] G AA u A (t) = iA (t)-I A -G AB u B (t) (2)

[0090] Among them, G AA is the nodal conductance matrix formed by the equivalent calculation resistances among the nodes of the unknown A-block at time t, and G AB is the nodal conductance matrix formed by the equivalent resistances between the nodes of the unknown A-block and the known B-block at time t, and u A (t) is the voltage of the unknown A-block nodes, and u B (t) is the voltage of the known B-block nodes, and i A (t) is the current of the unknown A-block nodes, and I A is the equivalent current source column vector calculated from the voltage and current values of the unknown A-block nodes at time (t - Δt), where Δt is the simulation calculation step size.

[0091] Based on the initial value calculation, for each time step, the right-hand side quantity of Equation (2) can be calculated, and then u A (t) can be obtained from the linear equations.

[0092] In the transient calculation, the electromagnetic transient model is adopted for the power system components, the interactive and full-process electromagnetic transient simulation technology is used, and the instantaneous value method is used for calculation, so that the instantaneous voltage and current changes in the order of dozens of microseconds can be analyzed, as Figure 1 shown.

[0093] It should be noted that at the beginning of switching to the parallel state for electromagnetic transient calculation, the static parameters of the local power grid are first obtained from the real-time database, and the initial state of the circuit breaker disconnector simulation device is set according to these parameters in the initialization stage.

[0094] In the embodiment of the present invention, the operation scoring module is specifically used for

[0095] scoring each operation based on the Gaussian fuzzy algorithm.

[0096] The Gaussian fuzzy algorithm is a commonly used fuzzy algorithm, which is based on the probability density function of the normal distribution (i.e., the Gaussian function), as shown in the formula:

[0097]

[0098] Among them, μ is the mean of x, and σ is the variance of x. Since the center point is the origin when calculating the average value, μ is equal to 0, then

[0099]

[0100] In its probability distribution being a normal distribution, the closer to the center point, the larger the value, and the farther from the center, the smaller the value. For example, Figure 2 as shown.

[0101] In the embodiment of the present invention, a deduction system is adopted when calculating the score value. The center point of the probability distribution graph of the Gaussian function (i.e., the origin, corresponding to the highest peak point) indicates no deduction, that is, this operation does not cause a change in the electrical quantity of the components in the digital power grid.

[0102] When a certain operation causes an increase in the change of the electrical quantity of the components in the digital power grid, a positive growth in the change corresponds to the right half of the probability distribution graph, and the larger the increment value, the farther from the center point;

[0103] When a certain operation causes a negative growth in the change of the electrical quantity of the components in the digital power grid, it corresponds to the left half of the probability distribution graph, and the larger the absolute value of the increment, the farther from the center point.

[0104] In the embodiment of the present invention, it is set that operations causing the expansion of faults are deducted more than 50 points, and special operations that may cause serious accidents are deducted 100 points. Then, the Gaussian fuzzy algorithm can be transformed by subtracting the values of each point on its x-axis from 100 to obtain a score distribution pattern graph as Figure 3 shown.

[0105] The specific calculation of the score is as follows:

[0106]

[0107] where x i is the change amount of the electrical quantity, and P(x i ) is the score (deduction) when the change amount of the electrical quantity is x i .

[0108] In the embodiment of the present invention, the electrical quantity calculation module is specifically used for

[0109] After receiving the faults specified in the training, performing cyclic iterative calculations on the electrical quantities of each component in the primary circuit of the substation in the practical training scenario until reaching the preset number of times N1;

[0110] And, after starting the operation, performing cyclic iterative calculations on the electrical quantities of each component in the primary circuit of the substation in the practical training scenario until reaching the preset number of times N2.

[0111] In the embodiment of the present invention, the operation scoring module uses the fluctuation of the bus voltage to score the operation. The specific implementation method is

[0112] After receiving the faults specified in the examination questions, obtaining the calculation results of the electrical quantity calculation module for cyclic iterative calculation of the bus voltage, and recording the maximum value V0 of the bus voltage amplitude;

[0113] For the operation set A p For the operation element a, after starting the operation element a, obtain the calculation result of the electrical quantity calculation module for the cyclic iterative calculation of the bus voltage, and record the maximum value V of the bus voltage amplitude am ;

[0114] Take the change amount V am -V0 of the bus voltage amplitude as x i , and calculate the corresponding value based on the Gaussian fuzzy algorithm as the score of operation a;

[0115] The score calculation based on the Gaussian fuzzy algorithm is as follows:

[0116]

[0117]

[0118] Among them, x i is the change amount of electrical quantity, and P(x i ) is the operation score when the change amount of electrical quantity is x i .

[0119] Perform the above operations on each operation element in the operation set A p , and based on the change amount of the bus voltage amplitude after the operation, use the probability distribution of the Gaussian function to obtain the operation score, and finally obtain the operation set A with scores pv .

[0120] It should be noted that in the embodiment of the present invention, the score of the operation is the deduction value

[0121] In the embodiment of the present invention, the value of N1 is 100. After 100 times of cyclic iteration, the impact of the fault has been avoided at this time, and the output characteristics of the electrical quantity after the fault have tended to be stable

[0122] In the embodiment of the present invention, the value of N2 is 100

[0123] In the embodiment of the present invention, the evaluation module is specifically used for

[0124] According to each operation element of the operation set A ps , obtain the deduction value of each operation element in the operation set A with scores in the entire training scenario pv ;

[0125] Accumulate the deduction values of all operation elements in the operation set A ps , and use 100 points to deduct the obtained accumulated value to obtain the final score of the training assessment

[0126] Embodiment 2

[0127] This embodiment provides a practical operation assessment method for the secondary circuit of a substation. Based on the practical operation assessment system for the secondary circuit of the substation in Embodiment 1, a practical operation assessment of the secondary circuit is carried out for trainees. The method includes:

[0128] Send the training fault to the practical operation training scenario of the secondary circuit built by the practical operation assessment system of the substation secondary circuit;

[0129] Calculate the electrical quantities of each component in the practical operation training scenario of the substation secondary circuit after the fault occurs, and calculate one by one all the operations that can be carried out in the training scenario. Calculate the electrical quantities of each component in the secondary circuit of the substation after the operation occurs;

[0130] Score the operation based on the change amount of the electrical quantity of the component after the operation, and obtain the set A with scores; pv ;

[0131] Perform actual operations in the practical operation training scenario according to the training fault to form the operation set A for solving the training fault; ps ;

[0132] Select the scores of each operation in the operation set A from the set A with scores; pv and integrate them to obtain the final score of the training assessment. ps

[0133] In the embodiment of the present invention, the electromagnetic transient model is used to calculate the electrical quantities of the components. During the calculation process, the interactive and full-process electromagnetic transient simulation technology is adopted, and the instantaneous value method is used for calculation, so that the instantaneous voltage and current changes at the level of dozens of microseconds can be analyzed.

[0134] In the embodiment of the present invention, the score calculation is as follows:

[0135]

[0136]

[0137] Among them, x i is the change amount of the electrical quantity, and P(x i ) is the operation score when the change amount of the electrical quantity is x i .

[0138] In the embodiment of the present invention, the deduction scores of all operation elements in the operation set A ps are accumulated, and the final score of the training assessment is obtained by subtracting the obtained accumulated value from 100 points.

[0139] ​Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0140] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one or more of the processes Figure 1 or blocks or the combination of blocks.

[0141] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in Figure 1 one or more of the processes Figure 1 or blocks or the combination of blocks.

[0142] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one or more of the processes Figure 1 or blocks or the combination of blocks.

[0143] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: still can modify the specific implementation manners of the present invention or make equivalent replacements, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A secondary circuit practical assessment system for a substation, characterized in that, Including: Training scenario module, used to simulate the practical training scenario of the secondary circuit of the substation and generate a set A of all possible operations p ; An electrical quantity calculation module, which is used to calculate the electrical quantities of each component in the primary circuit of a substation after a training fault occurs and after an operation occurs; the calculation method is as follows: G AA u A u(t) = i A (t) - I A -G AB u B (t); Among them, the primary circuit network of the substation is divided into block A composed of nodes with unknown voltages and block B composed of nodes with known voltages, G AA is the node conductance matrix formed by the equivalent calculation resistances between the nodes of the unknown block A at time t, G AB is the node conductance matrix formed by the equivalent resistances between the nodes of the unknown block A and the nodes of the known block B at time t, u A (t) is the voltage of the nodes of the unknown block A, u B (t) is the voltage of the nodes of the known block B, i A (t) is the current of the nodes of the unknown block A, I A is the equivalent current source column vector calculated from the voltage and current values of the nodes of the unknown block A at time (t - Δt), and Δt is the simulation calculation step size; An operation module, configured to perform operations in a practical training scenario according to the issued training faults, and form an operation set A for solving the training faults ps ; An operation scoring module, which is used to score all operations in set A after a training fault occurs p based on the change in the electrical quantity of the component, and obtain set A with scores pv ; The specific implementation process is as follows: After receiving the fault specified in the training, obtain the calculation result of the electrical quantity calculation module for cyclic iterative calculation of the bus voltage, and record the maximum value V0 of the bus voltage amplitude; For the operation element a in the operation set A p After starting the operation element a, obtain the calculation result of the electrical quantity calculation module for the cyclic iterative calculation of the bus voltage, and record the maximum value V of the bus voltage amplitude am ; Take the change in the amplitude of the bus voltage V am - V0 as the change in electrical quantity x i , and calculate the score of operation a based on the Gaussian fuzzy algorithm Calculate the score based on the Gaussian fuzzy algorithm as follows: where x i is the change in electrical quantity, and P(x i ) is the operation score when the change in electrical quantity is x i , and σ is the variance; For each operation element in the operation set A p Based on the change in the amplitude of the bus voltage after the operation, the operation score is calculated using the Gaussian fuzzy algorithm, and finally the operation set A with scores is obtained pv ; Evaluation module, used to screen out the scores of each operation in the operation set A from the set A with scores pv and integrate them to obtain the final score of the training assessment. ps ​ 2. The practical operation assessment system for the secondary circuit of a substation according to claim 1, characterized in that The training scenario module is specifically used for Using the relay protection devices and secondary circuits of intervals such as lines, buses, and bus couplers in a 220kV conventional substation as the simulation practical operation objects to construct a practical operation training scenario for the secondary circuit of the substation; The wiring form in the substation is as follows: 220kV uses a double bus; 110kV uses a double bus; 10kV uses a single bus sectionalization; and includes 2 main transformers; The practical operation training scenario includes: 1 220kV typical line interval, including the secondary circuit and primary equipment of 1 set of line protection, operating box, and circuit breaker operating mechanism; 1 220kV bus coupler interval, including the secondary circuit and primary equipment of 1 set of bus coupler protection, operating box, and circuit breaker operating mechanism circuit; 1 220kV bus interval, including a set of bus protection circuit and primary equipment; And Test instruments, including a relay protection tester and a multimeter.

3. The practical operation assessment system for the secondary circuit of a substation according to claim 2, wherein The training scenario module is specifically used for Generate the set A of all possible operations in the practical training scenario p , including the practice of secondary circuit faults and the practice of various protection device tests.

4. A secondary circuit practical assessment system for a substation according to claim 1, characterized in that The electrical quantity calculation module is specifically used for Using an electromagnetic transient calculation model to calculate the electrical quantities of each component in the primary circuit of the substation in the practical operation training scenario.

5. The actual operation assessment system for the secondary circuit of a substation according to claim 4, wherein, The electrical quantity calculation module is specifically used for After receiving the fault specified in the training, perform cyclic iterative calculation on the electrical quantities of each component in the primary circuit of the substation in the practical operation training scenario until the preset number of times N1 is reached; And after starting the operation, perform cyclic iterative calculation on the electrical quantities of each component in the primary circuit of the substation in the practical operation training scenario until the preset number of times N2 is reached.

6. The practical operation assessment system for the secondary circuit of a substation according to claim 5, wherein The operation scoring module is specifically used for Using the change amount of the bus voltage amplitude to score the operation.

7. The practical operation assessment system for the secondary circuit of a substation according to claim 6, characterized in that The evaluation module is specifically used for According to each operation element of operation set A ps in the scored operation set A of the entire training scenario pv the deduction scores of each operation element are obtained; Sum up the deduction scores of all operation elements in the operation set A ps and use 100 points to deduct the obtained cumulative value to get the final score of the training assessment.

8. A practical operation assessment method for the secondary circuit of a substation, characterized in that, Using the substation secondary circuit practical operation assessment system described in any one of claims 1 to 7 to conduct a secondary circuit practical operation assessment on students, and the method includes: Issuing a training fault to the secondary circuit practical operation training scenario built by the substation secondary circuit practical operation assessment system; Calculating the electrical quantities of each component in the secondary circuit practical operation training scenario of the substation after the fault occurs, and calculating one by one all the operations that can be performed in the training scenario, and calculating the electrical quantities of each component after the operation occurs; Score the operation based on the change in the electrical quantity of the component after the operation occurs, and obtain the set A with scores pv ; Perform actual operations in the practical training scenario according to the training faults to form an operation set A for solving the training faults ps ; From the set A with scores pv Filter out the operation set A ps The scores of each operation in it are integrated to obtain the final score of the training assessment.

Images