System and method for evaluating bearing capacity of power distribution network

Abstract

The invention discloses a power distribution network bearing capacity assessment system and method, and relates to the technical field of power distribution network bearing capacity assessment, and the system comprises a power distribution network data acquisition module, a comprehensive assessment model construction module and a power distribution network bearing capacity optimization module, and the output end of the power distribution network data acquisition module is electrically connected with an assessment index system construction module. And the output end of the evaluation index system construction module is electrically connected with a comprehensive evaluation model construction module. According to the power distribution network bearing capacity evaluation system and method, the comprehensive evaluation model construction module can give consideration to safety and economic factors, and the evaluation results of the safety and economic factors are converted into comprehensive scores through a combined weighting method, so that the evaluation accuracy is effectively improved; the optimization model construction module is used for constructing a power distribution network optimization model on the basis of the optimal bearing capacity and the optimal income of the power distribution network, and the power distribution network optimization scheduling module is used for providing a safe and economical operation mode of the current power distribution network on the basis of an output result of the power distribution network bearing capacity optimization module.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution network carrying capacity assessment, and specifically to an assessment system and method for the carrying capacity of a distribution network. Background Technique

[0002] The carrying capacity of a distribution network refers to the ability of the distribution network to safely, stably, and reliably transmit electric energy under specific conditions; with the large-scale development of new energy and new loads, the carrying capacity of the distribution network faces new challenges and opportunities. Therefore, it is necessary to improve the management level and dynamic carrying capacity of the distribution network, optimize the calculation method of the carrying capacity to adapt to the volatility and uncertainty of new energy, and the assessment of the carrying capacity is of great significance for the distribution network planning.

[0003] In the evaluation process of the existing evaluation systems and methods for the carrying capacity of a distribution network, the load carrying capacity of the distribution network is usually the main consideration, and factors such as safety and economy are not considered simultaneously, which is not conducive to the comprehensive evaluation of the distribution network, thus not conducive to the development of the economic benefits of the distribution network, nor conducive to the subsequent optimization of the carrying capacity of the distribution network. For this reason, we propose an evaluation system and method for the carrying capacity of a distribution network. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides an evaluation system and method for the carrying capacity of a distribution network, which solves the problems raised in the above background technique.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: An evaluation system for the carrying capacity of a distribution network includes a distribution network data acquisition module, a comprehensive evaluation model construction module, and a distribution network carrying capacity optimization module. The output end of the distribution network data acquisition module is electrically connected to an evaluation index system construction module, the output end of the evaluation index system construction module is electrically connected to the comprehensive evaluation model construction module, the output end of the comprehensive evaluation model construction module is electrically connected to an evaluation grading module, and the output end of the evaluation grading module is electrically connected to an evaluation report generation module. Moreover, the output end of the evaluation report generation module is electrically connected to an evaluation visualization display module. The output end of the evaluation report generation module is also electrically connected to the distribution network carrying capacity optimization module. The output end of the distribution network carrying capacity optimization module is electrically connected to a distribution network optimal scheduling module, and the output end of the distribution network optimal scheduling module is electrically connected to a distribution network scheduling feedback module, and the output end of the distribution network scheduling feedback module is electrically connected to the distribution network carrying capacity optimization module.

[0006] Furthermore, the evaluation index system construction module includes an evaluation parameter acquisition module and an evaluation weight determination module, and the output end of the evaluation parameter acquisition module is electrically connected to the evaluation weight determination module.

[0007] Further, the evaluation index system construction module is used to evaluate and construct a carrying capacity evaluation index system for the distribution network according to the requirements for the performance of the distribution network. The evaluation parameter acquisition module is used to obtain various evaluation parameters. The evaluation weight determination module is used to formulate weights for the evaluation parameters.

[0008] Further, the comprehensive evaluation model construction module includes a carrying capacity risk evaluation model for the distribution network and an economic evaluation model for the carrying capacity of the distribution network. The comprehensive evaluation model construction module is used to convert the evaluation results of the two single-objective function models into a comprehensive score through a combined weighting method.

[0009] Further, the carrying capacity risk evaluation model for the distribution network constructs a corresponding carrying capacity risk evaluation model based on the maximum carrying capacity under the voltage constraint of the distribution network. The economic evaluation model for the carrying capacity of the distribution network constructs a corresponding economic evaluation model for the carrying capacity based on the maximum benefit under the voltage constraint of the distribution network.

[0010] Further, the evaluation grading module is used to grade the evaluation output results of the comprehensive evaluation model construction module. The evaluation report generation module is used to automatically generate a carrying capacity evaluation report for the distribution network based on the comprehensive evaluation model construction module and the evaluation grading module. The evaluation visualization display module is used to visually display the carrying capacity evaluation results of the distribution network.

[0011] Further, the distribution network carrying capacity optimization module includes an optimization model construction module and an optimization scheme output module, and the output end of the optimization model construction module is electrically connected to the optimization scheme output module.

[0012] Further, the optimization model construction module is used to construct an optimization model for the distribution network based on the best carrying capacity and the best benefit of the distribution network. The optimization scheme output module is used to solve and output the best optimization scheme for the distribution network that takes into account both the carrying capacity and economic benefits of the distribution network.

[0013] Further, the distribution network optimal scheduling module is used to give a safe and economic operation mode for the current distribution network, that is, the best optimal scheduling scheme, based on the output results of the distribution network carrying capacity optimization module. The distribution network scheduling feedback module is used to feedback the distribution network data after implementing the optimal scheduling scheme to the evaluation system, so that the distribution network carrying capacity optimization module can perform secondary optimization of the distribution network carrying capacity on the basis of the implemented power distribution, to guide the real-time operation and short-term planning of the distribution network.

[0014] Further, the evaluation method of the evaluation system for the carrying capacity of the distribution network includes the following specific steps:

[0015] S1. First, obtain the relevant data of the distribution network carrying capacity through the distribution network data acquisition module. Then, the evaluation index system construction module evaluates and constructs the evaluation index system for the distribution network carrying capacity according to the requirements for the distribution network performance. Next, the comprehensive evaluation model construction module constructs the corresponding carrying capacity load evaluation model and carrying capacity economic evaluation model respectively based on the maximum carrying capacity under the distribution network voltage constraint and the maximum benefit under the distribution network voltage constraint. Then, on the basis of the two single-objective function models, the comprehensive evaluation model construction module converts the evaluation results of the two into a comprehensive score through the combined weighting method.

[0016] S2. Then, the evaluation grading module grades the evaluation output results of the comprehensive evaluation model construction module. Next, the evaluation report generation module can automatically generate an evaluation report for the distribution network carrying capacity on the basis of the comprehensive evaluation model construction module and the evaluation grading module. Finally, the evaluation visualization display module visually displays the evaluation results of the distribution network carrying capacity.

[0017] S3. Then, the distribution network carrying capacity optimization module constructs a distribution network optimization model on the basis of the optimal carrying capacity and optimal benefit of the distribution network, solves it and outputs the optimal optimization plan for the distribution network that takes into account both the distribution network carrying capacity and economic benefits. Then, on the basis of the output results of the distribution network carrying capacity optimization module, the distribution network optimal scheduling module gives the safe and economic operation mode of the current distribution network, that is, the optimal optimization scheduling plan, so as to effectively reduce the operation risk of the distribution network while considering factors such as safety and economy.

[0018] The present invention provides an evaluation system and method for the distribution network carrying capacity, having the following beneficial effects:

[0019] 1. The evaluation system and method for the distribution network carrying capacity are provided with a comprehensive evaluation model construction module. The evaluation index system construction module is used to evaluate and construct the evaluation index system for the distribution network carrying capacity according to the requirements for the distribution network performance. The evaluation parameter acquisition module is used to obtain various evaluation parameters. The evaluation weight determination module is used to formulate weights for the evaluation parameters. The distribution network carrying capacity risk evaluation model constructs the corresponding carrying capacity risk evaluation model based on the maximum carrying capacity under the distribution network voltage constraint. The distribution network carrying capacity economic evaluation model constructs the corresponding carrying capacity economic evaluation model based on the maximum benefit under the distribution network voltage constraint. The comprehensive evaluation model construction module is used to convert the evaluation results of the two into a comprehensive score through the combined weighting method on the basis of the two single-objective function models, effectively improving the evaluation accuracy on the basis of the safe and economic operation mode.

[0020] 2. The evaluation system and method for the carrying capacity of the distribution network are provided with an evaluation report generation module and a visualization display module. The evaluation grading module is used to grade the evaluation output results of the comprehensive evaluation model construction module. The evaluation report generation module is used to automatically generate an evaluation report on the carrying capacity of the distribution network based on the comprehensive evaluation model construction module and the evaluation grading module. The evaluation visualization display module is used to visually display the evaluation results of the carrying capacity of the distribution network.

[0021] 3. The evaluation system and method for the carrying capacity of the distribution network are provided with a distribution network carrying capacity optimization module. The optimization model construction module of the distribution network carrying capacity optimization module is used to construct an optimization model for the distribution network based on the best carrying capacity and the best benefit of the distribution network. The optimization scheme output module is used to solve and output the best optimization scheme for the distribution network that takes into account both the carrying capacity of the distribution network and economic benefits. The distribution network optimization scheduling module is used to give the safe and economic operation mode of the current distribution network, that is, the best optimization scheduling scheme, based on the output results of the distribution network carrying capacity optimization module. The distribution network scheduling feedback module is used to feed back the distribution network data after implementing the optimization scheduling scheme to the evaluation system, so that the distribution network carrying capacity optimization module can perform secondary optimization of the carrying capacity of the distribution network on the basis of the implemented power distribution, in order to guide the real-time operation and short-term planning of the distribution network. Brief Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the system framework of the evaluation system and method for the carrying capacity of the distribution network of the present invention;

[0023] Figure 2 It is a schematic diagram of the distribution network optimization scheduling module of the evaluation system and method for the carrying capacity of the distribution network of the present invention;

[0024] Figure 3 It is a schematic diagram of the evaluation index system construction module of the evaluation system and method for the carrying capacity of the distribution network of the present invention;

[0025] Figure 4 It is a schematic diagram of the comprehensive evaluation model construction module of the evaluation system and method for the carrying capacity of the distribution network of the present invention;

[0026] Figure 5 It is a schematic diagram of the distribution network carrying capacity optimization module of the evaluation system and method for the carrying capacity of the distribution network of the present invention.

[0027] In the figure: 1. Distribution network data acquisition module; 2. Evaluation index system construction module; 201. Evaluation parameter acquisition module; 202. Evaluation weight determination module; 3. Comprehensive evaluation model construction module; 301. Distribution network carrying capacity risk assessment model; 302. Distribution network carrying capacity economic evaluation model; 4. Evaluation grading module; 5. Evaluation report generation module; 6. Evaluation visualization display module; 7. Distribution network carrying capacity optimization module; 701. Optimization model construction module; 702. Optimization plan output module; 8. Distribution network optimal scheduling module; 9. Distribution network scheduling feedback module. Specific implementation manner

[0028] Please refer to Figure 1 , Figure 3 and Figure 4 , the present invention provides a technical solution: an evaluation system for the carrying capacity of a distribution network, including a distribution network data acquisition module 1, a comprehensive evaluation model construction module 3, and a distribution network carrying capacity optimization module 7. The output end of the distribution network data acquisition module 1 is electrically connected to an evaluation index system construction module 2. The output end of the evaluation index system construction module 2 is electrically connected to a comprehensive evaluation model construction module 3. The evaluation index system construction module 2 includes an evaluation parameter acquisition module 201 and an evaluation weight determination module 202. And the output end of the evaluation parameter acquisition module 201 is electrically connected to the evaluation weight determination module 202. The comprehensive evaluation model construction module 3 includes a distribution network carrying capacity risk assessment model 301 and a distribution network carrying capacity economic evaluation model 302;

[0029] The specific operations are as follows. The distribution network data acquisition module 1 is used to acquire historical data, current data, load data, etc. of the distribution network. The evaluation index system construction module 2 is used to evaluate according to the requirements of the distribution network performance and construct an evaluation index system for the carrying capacity of the distribution network. The evaluation parameter acquisition module 201 is used to acquire various evaluation parameters. The evaluation weight determination module 202 is used to formulate weights for the evaluation parameters. The distribution network carrying capacity risk assessment model 301 constructs a corresponding carrying capacity risk assessment model based on the maximum carrying capacity under the voltage constraint of the distribution network. The distribution network carrying capacity economic evaluation model 302 constructs a corresponding carrying capacity economic evaluation model based on the maximum benefit under the voltage constraint of the distribution network. The comprehensive evaluation model construction module 3 is used to convert the evaluation results of the two single-objective function models into a comprehensive score through the combined weighting method on the basis of the two single-objective function models.

[0030] Please refer to Figure 1 and Figure 2, the output end of the comprehensive evaluation model construction module 3 is electrically connected to the evaluation grading module 4, the output end of the evaluation grading module 4 is electrically connected to the evaluation report generation module 5, and the output end of the evaluation report generation module 5 is electrically connected to the evaluation visualization display module 6. The output end of the evaluation report generation module 5 is also electrically connected to the distribution network carrying capacity optimization module 7;

[0031] The specific operations are as follows. The evaluation grading module 4 is used to grade the evaluation output results of the comprehensive evaluation model construction module 3. The evaluation report generation module 5 is used to automatically generate a distribution network carrying capacity evaluation report based on the comprehensive evaluation model construction module 3 and the evaluation grading module 4. The evaluation visualization display module 6 is used to visually display the distribution network carrying capacity evaluation results.

[0032] Please refer to Figure 2 and Figure 5 , the distribution network carrying capacity optimization module 7 includes an optimization model construction module 701 and an optimization scheme output module 702. The output end of the optimization model construction module 701 is electrically connected to the optimization scheme output module 702. The output end of the distribution network carrying capacity optimization module 7 is electrically connected to the distribution network optimization scheduling module 8. The output end of the distribution network optimization scheduling module 8 is electrically connected to the distribution network scheduling feedback module 9. And the output end of the distribution network scheduling feedback module 9 is electrically connected to the distribution network carrying capacity optimization module 7;

[0033] The specific operations are as follows. The optimization model construction module 701 of the distribution network carrying capacity optimization module 7 is used to construct a distribution network optimization model based on the best carrying capacity and best benefits of the distribution network. The optimization scheme output module 702 is used to solve and output the best optimization scheme of the distribution network that takes into account both the distribution network carrying capacity and economic benefits. The distribution network optimization scheduling module 8 is used to give the safe and economic operation mode of the current distribution network, that is, the best optimization scheduling scheme, based on the output results of the distribution network carrying capacity optimization module 7. The distribution network scheduling feedback module 9 is used to feedback the distribution network data after executing the optimization scheduling scheme to the evaluation system, so that the distribution network carrying capacity optimization module 7 can perform secondary optimization of the distribution network carrying capacity on the basis of the executed power distribution, to guide the real-time operation and short-term planning of the distribution network.

[0034] In summary, please refer to Figures 1 - 5, for the evaluation system and method of the carrying capacity of the distribution network, when in use, first, the distribution network data acquisition module 1 is used to acquire the historical data, current data, load data, etc. of the distribution network. Then, the evaluation index system construction module 2 evaluates according to the requirements for the performance of the distribution network and constructs an evaluation index system for the carrying capacity of the distribution network. First, the evaluation parameter acquisition module 201 acquires various evaluation parameters, and then the evaluation weight determination module 202 is used to formulate weights for the evaluation parameters. Next, the carrying capacity risk assessment model 301 of the distribution network constructs a corresponding carrying capacity risk assessment model based on the maximum carrying capacity under the voltage constraint of the distribution network. The carrying capacity economic assessment model 302 of the distribution network constructs a corresponding carrying capacity economic assessment model based on the maximum benefit under the voltage constraint of the distribution network. Then, the comprehensive evaluation model construction module 3, based on the two single-objective function models, converts the evaluation results of the two into a comprehensive score through the combined weighting method. Then, the evaluation grading module 4 grades the evaluation output results of the comprehensive evaluation model construction module 3. Next, the evaluation report generation module 5 can automatically generate an evaluation report on the carrying capacity of the distribution network based on the comprehensive evaluation model construction module 3 and the evaluation grading module 4. Finally, the evaluation visualization display module 6 visually displays the evaluation results of the carrying capacity of the distribution network;

[0035] Then, the optimization model construction module 701 of the carrying capacity optimization module 7 of the distribution network constructs an optimization model of the distribution network based on the best carrying capacity and the best benefit of the distribution network. Then, the optimization scheme output module 702 solves and outputs the best optimization scheme of the distribution network that takes into account both the carrying capacity and economic benefits of the distribution network. Then, the distribution network optimization scheduling module 8, based on the output results of the carrying capacity optimization module 7 of the distribution network, gives the safe and economic operation mode of the current distribution network, that is, the best optimization scheduling scheme, thereby effectively reducing the operation risk of the distribution network while considering factors such as safety and economy. Then, the distribution network scheduling feedback module 9 can feed back the distribution network data after executing the optimization scheduling scheme to the evaluation system, enabling the carrying capacity optimization module 7 of the distribution network to perform secondary optimization of the carrying capacity of the distribution network based on the distribution network after execution to guide the real-time operation and short-term planning of the distribution network. In this way, the use process of the entire evaluation system and method for the carrying capacity of the distribution network is completed.

[0036] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

Claims

1. A distribution network carrying capacity evaluation system, characterized in that: The invention comprises a distribution network data acquisition module (1), a comprehensive evaluation model construction module (3) and a distribution network carrying capacity optimization module (7), wherein the output end of the distribution network data acquisition module (1) is electrically connected to an evaluation index system construction module (2), the output end of the evaluation index system construction module (2) is electrically connected to a comprehensive evaluation model construction module (3), the output end of the comprehensive evaluation model construction module (3) is electrically connected to an evaluation grading module (4), and the output end of the evaluation grading module (4) is electrically connected to an evaluation report generation module ( 5), and the output end of the evaluation report generation module (5) is electrically connected to the evaluation visualization display module (6), the output end of the evaluation report generation module (5) is also electrically connected to the distribution network carrying capacity optimization module (7), the output end of the distribution network carrying capacity optimization module (7) is electrically connected to the distribution network optimization scheduling module (8), and the output end of the distribution network optimization scheduling module (8) is electrically connected to the distribution network scheduling feedback module (9), and the output end of the distribution network scheduling feedback module (9) is electrically connected to the distribution network carrying capacity optimization module (7).

2. A distribution network carrying capacity evaluation system according to claim 1, characterized in that: The evaluation index system construction module (2) comprises an evaluation parameter acquisition module (201) and an evaluation weight establishment module (202), and the output end of the evaluation parameter acquisition module (201) is electrically connected to the evaluation weight establishment module (202).

3. A distribution network carrying capacity evaluation system according to claim 2, characterized in that: The evaluation index system construction module (2) is used to evaluate the distribution network performance requirements and construct a distribution network carrying capacity evaluation index system, the evaluation parameter acquisition module (201) is used to obtain various evaluation parameters, and the evaluation weight establishment module (202) is used to weight the evaluation parameters.

4. A distribution network carrying capacity evaluation system according to claim 1, characterized in that: The comprehensive evaluation model construction module (3) comprises a distribution network carrying capacity risk evaluation model (301) and a distribution network carrying capacity economic evaluation model (302). The comprehensive evaluation model construction module (3) is used to convert the evaluation results of the two single objective function models into a comprehensive score through a combined weighting method based on the two single objective function models.

5. A distribution network carrying capacity evaluation system according to claim 4, characterized in that: The distribution network carrying capacity risk assessment model (301) constructs a corresponding carrying capacity risk assessment model based on the maximum carrying capacity under the distribution network voltage constraint, and the distribution network carrying capacity economic assessment model (302) constructs a corresponding carrying capacity economic assessment model based on the maximum benefit under the distribution network voltage constraint.

6. A distribution network carrying capacity evaluation system according to claim 1, characterized in that: The evaluation classification module (4) is used to classify and grade the evaluation output results of the comprehensive evaluation model construction module (3); the evaluation report generation module (5) is used to automatically generate a distribution network carrying capacity evaluation report based on the comprehensive evaluation model construction module (3) and the evaluation classification module (4); and the evaluation visualization display module (6) is used to visualize the distribution network carrying capacity evaluation results.

7. A distribution network carrying capacity evaluation system according to claim 1, characterized in that: The distribution network carrying capacity optimization module (7) comprises an optimization model construction module (701) and an optimization scheme output module (702), and the output end of the optimization model construction module (701) is electrically connected to the optimization scheme output module (702).

8. A distribution network carrying capacity evaluation system according to claim 7, characterized in that: The optimization model construction module (701) is used to construct a distribution network optimization model based on the optimal carrying capacity and optimal benefit of the distribution network, and the optimization solution output module (702) is used to solve and output the optimal distribution network optimization solution that takes into account the distribution network carrying capacity and economic benefits.

9. A distribution network carrying capacity evaluation system according to claim 1, characterized in that: The distribution network optimization and dispatching module (8) is used to provide a safe and economical operation mode of the current distribution network, that is, an optimal optimization dispatching scheme, based on the output result of the distribution network bearing capacity optimization module (7). The distribution network dispatching feedback module (9) is used to feed back the distribution network data after executing the optimization dispatching scheme to the evaluation system, so that the distribution network bearing capacity optimization module (7) performs secondary optimization of the distribution network bearing capacity based on the distribution after execution, so as to guide the real-time operation and short-term planning of the distribution network.

10. A distribution network carrying capacity evaluation system according to claim 1, characterized in that: The evaluation method of the distribution network carrying capacity evaluation system comprises the following specific steps: S1. First, the distribution network data acquisition module (1) obtains the relevant data of the distribution network carrying capacity. Then, the evaluation index system construction module (2) evaluates the distribution network performance requirements and constructs the distribution network carrying capacity evaluation index system. Then, the comprehensive evaluation model construction module (3) constructs the corresponding carrying capacity load evaluation model and carrying capacity economic evaluation model based on the maximum carrying capacity under the distribution network voltage constraint and the maximum benefit under the distribution network voltage constraint. Then, based on the two single objective function models, the comprehensive evaluation model construction module (3) converts the evaluation results of the two into a comprehensive score through a combined weighting method. S1, then the evaluation output result of the comprehensive evaluation model construction module (3) is classified and graded by the evaluation classification module (4), and then the evaluation report generation module (5) can automatically generate a distribution network carrying capacity evaluation report based on the comprehensive evaluation model construction module (3) and the evaluation classification module (4), and finally the distribution network carrying capacity evaluation result is visualized by the evaluation visualization display module (6); S3. Then, the distribution network carrying capacity optimization module (7) constructs a distribution network optimization model based on the optimal carrying capacity and optimal benefit of the distribution network, solves and outputs the optimal optimization plan for the distribution network that takes into account both the carrying capacity and economic benefits of the distribution network. Then, the distribution network optimization scheduling module (8) gives the safe and economic operation mode of the current distribution network, that is, the optimal optimization scheduling plan, based on the output results of the distribution network carrying capacity optimization module (7), thereby effectively reducing the operation risk of the distribution network while taking into account factors such as safety and economy.

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