Method and system for optimizing topological structure of power distribution network

Abstract

The invention discloses a power distribution network topological structure optimization method and system, and the method comprises the steps: calculating a corresponding communication signal quality index and a corresponding power reliability index after the topological structure optimization of a power distribution network is carried out through employing each topological optimization scheme, and carrying out the comprehensive analysis of the communication signal quality index and the power reliability index. According to the method, the optimal optimization scheme is screened out to optimize the topological structure of the power distribution network, so that the communication quality of the intelligent switch is ensured to a certain extent, the accuracy of the acquired power parameters is further ensured, and the reliability of the topological structure optimization of the power distribution network is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of power grids, and in particular to a method and system for optimizing the topological structure of a distribution network. Background Art

[0002] In a complex distribution network, the probability of power lines and power equipment failing increases with age. When a distribution network fails, the topology of the distribution network needs to be optimized. At present, the method of collecting power parameters of the distribution network through intelligent switches and optimizing the topology of the distribution network based on the collected power parameters has been widely used.

[0003] However, when optimizing the distribution network topology, some frequency conversion equipment needs to be started and stopped. This process will generate electromagnetic interference, affect the communication quality of the smart switch, and cannot guarantee the accurate collection of power parameters, affecting the reliability of the distribution network topology optimization. Summary of the invention

[0004] Based on this, the present invention provides a distribution network topology optimization method and system to solve the defect that the reliability of distribution network topology optimization is poor due to the current inability to ensure the accuracy of power parameter collection by intelligent switches.

[0005] To achieve the above object, an embodiment of the present invention provides a method for optimizing a distribution network topology, comprising: Construct distribution network topology model; When the real distribution network needs to be optimized in topology, several topology optimization schemes are obtained; Optimizing the topology of the virtual distribution network in the distribution network topology model according to the topology optimization scheme, and calculating the communication signal quality index and the power reliability index after optimizing the topology of the virtual distribution network; the communication signal quality index is used to characterize the communication reliability of the virtual intelligent switch in the distribution network topology model, and the power reliability index is used to characterize the power supply reliability of the virtual distribution network; Taking the best communication signal quality index and the best power reliability index as the goal, selecting the best optimization scheme from all the topology optimization schemes; The topology of the real power distribution network is optimized according to the best optimization scheme.

[0006] To achieve the above object, an embodiment of the present invention further provides a distribution network topology optimization system, comprising: A model building module is used to build a distribution network topology model; The scheme acquisition module is used to obtain several topology optimization schemes when the real distribution network needs to be optimized in topology structure; An index calculation module, used to optimize the topology of the virtual distribution network in the distribution network topology model according to the topology optimization scheme, and calculate the communication signal quality index and the power reliability index after optimizing the topology of the virtual distribution network; the communication signal quality index is used to characterize the communication reliability of the virtual intelligent switch in the distribution network topology model, and the power reliability index is used to characterize the power supply reliability of the virtual distribution network; A scheme screening module, used for screening out the best optimization scheme from all the topology optimization schemes with the goal of optimizing the communication signal quality index and the power reliability index; An optimization module is used to optimize the topology of the real distribution network according to the best optimization scheme.

[0007] Compared with the prior art, the distribution network topology optimization method and system disclosed in the embodiment of the present invention firstly construct a distribution network topology model for a real distribution network, and when the real distribution network needs to be topologically optimized, obtain several topology optimization schemes; then, respectively use each topology optimization scheme to optimize the topology of the virtual distribution network in the distribution network topology model, and calculate the corresponding communication signal quality index and power reliability index after the topology of the virtual distribution network is optimized; wherein the communication signal quality index is used to characterize the communication reliability of the virtual intelligent switch in the distribution network topology model, and the power reliability index is used to characterize the power supply reliability of the virtual distribution network; then, with the best communication signal quality index and the best power reliability index as the goal, the best optimization scheme is screened out from all topology optimization schemes; finally, the topology of the real distribution network is optimized according to the best optimization scheme. It can be seen that the embodiment of the present invention calculates the corresponding communication signal quality index and power reliability index after the topology structure of the distribution network is optimized by adopting various topology optimization schemes respectively, and screens out the best optimization scheme to optimize the topology structure of the distribution network by comprehensively analyzing the communication signal quality index and the power reliability index, which ensures the communication quality of the intelligent switch to a certain extent, and then ensures the accuracy of the collected power parameters, thereby ensuring the reliability of the optimization of the topology structure of the distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 It is a flow chart of a method for optimizing a distribution network topology structure provided by an embodiment of the present invention; Figure 2It is a structural schematic diagram of a distribution network topology optimization system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0010] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0011] See also Figure 1 , is a flow chart of a method for optimizing a distribution network topology structure provided by an embodiment of the present invention. Specifically, the method for optimizing a distribution network topology structure comprises steps S1 to S5: S1. Construct a distribution network topology model.

[0012] Specifically, the topological information of the real distribution network and the parameter information of each power device in the real distribution network (such as power parameters and communication parameters, etc.) are obtained to construct the distribution network topological structure model. The distribution network topological structure model can be a digital twin model, in which the digital twin makes full use of physical models, sensors, historical operation data, etc., integrates multi-disciplinary, multi-physical quantity, multi-scale, and multi-probability simulation processes, completes mapping in virtual space, and thus reflects the full life cycle process of the corresponding physical equipment.

[0013] S2. When the real distribution network needs to be topologically optimized, several topology optimization schemes are obtained.

[0014] Exemplarily, multiple fault types can be pre-set, and multiple topology optimization schemes can be pre-set for each fault type; when the real distribution network needs to perform topology optimization, such as when a fault occurs, multiple topology optimization schemes for dealing with the fault are obtained.

[0015] S3. Optimize the topology structure of the virtual distribution network in the distribution network topology structure model according to the topology optimization scheme, and calculate the communication signal quality index and the power reliability index after optimizing the topology structure of the virtual distribution network; the communication signal quality index is used to characterize the communication reliability of the virtual intelligent switch in the distribution network topology structure model, and the power reliability index is used to characterize the power supply reliability of the virtual distribution network.

[0016] Specifically, in the distribution network topology model, various topology optimization schemes are used to optimize the topology of the virtual distribution network, and the communication signal quality index and power reliability index of the virtual distribution network are calculated after optimization. Exemplarily, the communication signal quality index can be one or both of the signal-to-noise ratio (SNR) and the bit error rate (BER), or other parameters, which are not limited here; in this embodiment, the communication signal quality index is used to characterize the communication reliability of the virtual intelligent switch. The power reliability index can be at least one or both of the voltage stability and the power outage frequency, or other parameters, which are not limited here; in this embodiment, the power reliability index is used to characterize the power supply reliability of the virtual distribution network, and the higher the value of the power reliability index, the more reliable the power supply.

[0017] It is worth noting that the virtual distribution network corresponds to the real distribution network, and the virtual smart switch corresponds to the real smart switch. The real smart switch is a highly intelligent power control device that can use modern control and communication technologies to monitor and accurately control key parameters such as current and voltage in the real distribution network in real time.

[0018] S4. Taking the best communication signal quality index and the best power reliability index as the goal, select the best optimization scheme from all the topology optimization schemes.

[0019] Specifically, by comparing the communication signal quality indicators and power reliability indicators corresponding to each topology optimization scheme, the best optimization scheme is selected by comprehensively considering the communication quality and power supply reliability, which can both meet the power supply demand and ensure the communication quality.

[0020] S5. Optimize the topology of the real distribution network according to the best optimization scheme.

[0021] Specifically, after the calculations in steps S1 to S4, the best optimization scheme is selected, and the topology of the real distribution network is optimized according to the best optimization scheme, thereby ensuring the power supply reliability of the real distribution network after optimization, and at the same time ensuring the communication quality of the real smart switches in the real distribution network to a certain extent.

[0022] Compared with the prior art, the embodiment of the present invention calculates the corresponding communication signal quality index and power reliability index after each topology optimization scheme is used to optimize the topology structure of the distribution network, and screens out the best optimization scheme to optimize the topology structure of the distribution network by comprehensively analyzing the communication signal quality index and the power reliability index, thereby ensuring the communication quality of the intelligent switch to a certain extent, and then ensuring the accuracy of the collected power parameters, thereby ensuring the reliability of the topology structure optimization of the distribution network.

[0023] In a preferred embodiment, on the basis of steps S1 to S5, the optimal optimization scheme is selected from all the topology optimization schemes with the goal of optimizing the communication signal quality index and optimizing the power reliability index, including: Normalizing the communication signal quality indicator to obtain a normalized communication quality indicator; Normalizing the power reliability index to obtain a normalized power supply reliability index; Performing weighted summation on the normalized communication quality index and the normalized power supply reliability index to obtain a comprehensive optimization value; A topology optimization scheme with the largest comprehensive optimization value is selected from all the topology optimization schemes to serve as the best optimization scheme.

[0024] Specifically, the communication signal quality indicators corresponding to all topology optimization schemes are normalized, and each communication signal quality indicator is mapped to the range of [0, 1] to obtain the normalized communication quality indicators corresponding to each topology optimization scheme. The power reliability indicators corresponding to all topology optimization schemes are normalized, and each power reliability indicator is mapped to the range of [0, 1] to obtain the normalized power supply reliability indicators corresponding to each topology optimization scheme. After the above normalization is completed, the normalized communication quality indicator and the normalized power supply reliability indicator are weighted and summed to obtain a comprehensive optimization value, and the topology optimization scheme with the largest comprehensive optimization value is taken as the best optimization scheme. Exemplarily, assuming that the communication signal quality indicator is the signal-to-noise ratio and the power reliability indicator is the power outage frequency, then the normalized signal-to-noise ratio is multiplied by the first coefficient to obtain the signal-to-noise ratio contribution value, the normalized power outage frequency is multiplied by the second coefficient to obtain the power outage frequency contribution value, and the signal-to-noise ratio contribution value and the power outage frequency contribution value are added to obtain the comprehensive optimization value. It can be understood that the larger the signal-to-noise ratio, the better the communication quality, so the first coefficient should be a positive number; the lower the power outage frequency, the more reliable the power supply, so the second coefficient should be a negative number. The positive or negative value of the first coefficient is determined by the type of communication signal quality indicator, and the positive or negative value of the second coefficient is determined by the type of power reliability indicator. The values ​​of the first coefficient and the second coefficient are set according to the actual situation and are not limited here.

[0025] In a preferred embodiment, based on steps S1 to S5, the topology optimization scheme is obtained in the following manner: Acquire power parameters of the distribution network collected in real time by real intelligent switches in the real distribution network; When the real intelligent switch detects that a fault exists in the real power distribution network, several topology optimization schemes are generated according to the power parameters of the power distribution network.

[0026] Specifically, the real intelligent switch collects the power parameters of the distribution network in real time, analyzes whether there is a fault in the real distribution network based on the real-time collected power parameters of the distribution network, determines the specific fault type and fault location, and generates multiple corresponding topology structure optimization schemes for adjusting the operating status of each power equipment in the real distribution network. These topology optimization schemes can eliminate the negative impact caused by the fault to a certain extent.

[0027] In a preferred embodiment, on the basis of steps S1 to S5, after selecting the best optimization scheme from all the topology optimization schemes with the goal of optimizing the communication signal quality index and optimizing the power reliability index, the method further includes: When the communication signal quality indicator corresponding to the best optimization solution does not meet the preset communication quality requirement, adjusting the communication parameters of the virtual intelligent switch until the communication signal quality indicator meets the communication quality requirement; After the topology of the real distribution network is optimized according to the optimal optimization scheme, the method further includes: The communication parameters of the real smart switch in the real power distribution network are set according to the adjusted communication parameters of the virtual smart switch.

[0028] Specifically, after the best optimization scheme is screened out, the communication signal quality index corresponding to the best optimization scheme is analyzed to determine whether the communication quality requirements are met. If the communication signal quality index corresponding to the best optimization scheme does not meet the communication quality requirements, it is necessary to adjust the communication parameters of the virtual smart switch and recalculate the communication signal quality index until the communication signal quality index meets the communication quality requirements, and use the adjusted communication parameters to set the communication parameters of the real smart switch in the real distribution network.

[0029] Exemplarily, assuming that the communication signal quality indicator is the signal-to-noise ratio, if the signal-to-noise ratio is greater than a preset signal-to-noise ratio threshold (such as 20 decibels, 25 decibels or 30 decibels, etc.), the communication quality requirements are met; if the signal-to-noise ratio is not greater than the signal-to-noise ratio threshold, the communication quality requirements are not met. Assuming that the communication signal quality indicator is the bit error rate, if the bit error rate is less than the set bit error rate threshold (such as ten to the negative cube, ten to the negative fourth power or ten to the negative fifth power, etc.), the communication quality requirements are met; if the bit error rate is not less than the set bit error rate threshold, the communication quality requirements are not met. It is worth noting that the specific type of communication signal quality indicator and the communication quality requirements can be set according to actual conditions and are not limited here.

[0030] In a preferred embodiment, on the basis of steps S1 to S5, after the topology optimization of the real distribution network is performed according to the best optimization scheme, the method further includes: Monitoring real-time communication signals of real smart switches in the real power distribution network; When the signal-to-noise ratio of the real-time communication signal is less than a preset signal-to-noise ratio threshold, the communication parameters of the real intelligent switch are adjusted so that the signal-to-noise ratio of the real-time communication signal is not less than the signal-to-noise ratio threshold.

[0031] Specifically, after optimizing the real distribution network, this embodiment monitors the real-time communication signal of the real smart switch, analyzes the real-time communication signal to determine the real-time signal-to-noise ratio. If it is detected that the signal-to-noise ratio is less than the signal-to-noise ratio threshold, it means that the current communication quality of the real smart switch is poor, and the accuracy of the power parameters of the distribution network collected by the real smart switch cannot be guaranteed. Therefore, the communication parameters of the real smart switch are adjusted to improve the signal-to-noise ratio, thereby improving the accuracy of the power parameters of the distribution network collected by the real smart switch.

[0032] Optionally, when the signal-to-noise ratio of the real-time communication signal is less than a preset signal-to-noise ratio threshold, adjusting the communication parameters of the real intelligent switch so that the signal-to-noise ratio of the real-time communication signal is not less than the signal-to-noise ratio threshold includes: When the signal-to-noise ratio of the real-time communication signal is less than a preset signal-to-noise ratio threshold, the communication transmission power of the real intelligent switch is gradually increased until the signal-to-noise ratio of the real-time communication signal is not less than the signal-to-noise ratio threshold.

[0033] Specifically, assuming that the communication parameter is the communication transmission power, the higher the communication transmission power, the greater the transmission strength of the real-time communication signal, and the less affected by electromagnetic interference. Therefore, the communication quality can be improved by increasing the communication transmission power. In addition, the anti-interference ability of the real-time communication signal can be enhanced by adopting spread spectrum communication technology and using controllable redundant codes, and the anti-interference ability of the real-time communication signal can also be enhanced by using diversity reception technology.

[0034] Optionally, when the signal-to-noise ratio of the real-time communication signal is less than a preset signal-to-noise ratio threshold, adjusting the communication parameters of the real intelligent switch so that the signal-to-noise ratio of the real-time communication signal is not less than the signal-to-noise ratio threshold includes: When the signal-to-noise ratio of the real-time communication signal is less than a preset signal-to-noise ratio threshold, gradually increasing the communication transmission power of the real intelligent switch until the signal-to-noise ratio of the real-time communication signal is not less than the signal-to-noise ratio threshold or the communication transmission power of the real intelligent switch reaches a set power threshold; If the signal-to-noise ratio of the real-time communication signal is still less than the signal-to-noise ratio threshold when the communication transmission power reaches the set power threshold, the communication link of the real intelligent switch is switched from the current communication link to the backup communication link.

[0035] Specifically, as the communication transmission power increases, the real smart switch becomes more resistant to interference, and at the same time, consumes more energy. If the communication transmission power increases to a set power threshold (this value can be set according to actual conditions and is not limited here), and the signal-to-noise ratio is still less than the signal-to-noise ratio threshold, it means that even if a large amount of energy is consumed, the communication quality cannot be guaranteed. If the communication transmission power continues to increase, it will lead to excessive energy consumption. At this time, the current communication link of the real smart switch should be abandoned and switched from the current communication link to the backup communication link.

[0036] Furthermore, the current communication link is a 5G communication link, and the backup communication link is a fiber optic communication link.

[0037] Specifically, the 5G communication link is a wireless communication link that relies on the fifth generation mobile communication technology (5th Generation Mobile Communication Technology, 5G). In the optical fiber communication link, the signal is transmitted in the optical fiber in the form of light. The optical fiber communication link is a wired communication link, and its anti-interference ability is stronger than the wireless communication link. Therefore, in this embodiment, switching the communication link from the 5G communication link to the optical fiber communication link can improve the anti-interference ability of the real-time communication signal, ensure the accuracy of the collected power parameters of the distribution network, and ensure the reliability of the topological structure optimization of the real distribution network.

[0038] Compared with the prior art, the distribution network topology optimization method provided by the embodiment of the present invention firstly constructs a distribution network topology model for a real distribution network, and when the real distribution network needs to be topologically optimized, obtains several topology optimization schemes; then, each topology optimization scheme is used to optimize the topology of the virtual distribution network in the distribution network topology model, and the communication signal quality index and the power reliability index corresponding to the optimized topology of the virtual distribution network are calculated; wherein the communication signal quality index is used to characterize the communication reliability of the virtual intelligent switch in the distribution network topology model, and the power reliability index is used to characterize the power supply reliability of the virtual distribution network; then, with the goal of achieving the best communication signal quality index and the best power reliability index, the best optimization scheme is screened out from all topology optimization schemes; finally, the topology of the real distribution network is optimized according to the best optimization scheme. It can be seen that the embodiment of the present invention calculates the corresponding communication signal quality index and power reliability index after the topology structure of the distribution network is optimized by adopting various topology optimization schemes respectively, and screens out the best optimization scheme to optimize the topology structure of the distribution network by comprehensively analyzing the communication signal quality index and the power reliability index, which ensures the communication quality of the intelligent switch to a certain extent, and then ensures the accuracy of the collected power parameters, thereby ensuring the reliability of the optimization of the topology structure of the distribution network.

[0039] See also Figure 2 The embodiment of the present invention further provides a distribution network topology optimization system, including: A model building module 21 is used to build a distribution network topology model; A solution acquisition module 22 is used to acquire several topology optimization solutions when the real distribution network needs to be optimized in topology structure; An index calculation module 23 is used to optimize the topology of the virtual distribution network in the distribution network topology model according to the topology optimization scheme, and calculate the communication signal quality index and the power reliability index after optimizing the topology of the virtual distribution network; the communication signal quality index is used to characterize the communication reliability of the virtual intelligent switch in the distribution network topology model, and the power reliability index is used to characterize the power supply reliability of the virtual distribution network; A scheme screening module 24 is used to screen out the best optimization scheme from all the topology optimization schemes with the goal of optimizing the communication signal quality index and the power reliability index; The optimization module 25 is used to optimize the topology of the real distribution network according to the best optimization solution.

[0040] Furthermore, the solution screening module 24 is specifically used for: Normalizing the communication signal quality indicator to obtain a normalized communication quality indicator; Normalizing the power reliability index to obtain a normalized power supply reliability index; Performing weighted summation on the normalized communication quality index and the normalized power supply reliability index to obtain a comprehensive optimization value; A topology optimization scheme with the largest comprehensive optimization value is selected from all the topology optimization schemes to serve as the best optimization scheme.

[0041] It is worth noting that the specific working process of the distribution network topology structure optimization system can refer to the working process of the distribution network topology structure optimization method described in the above embodiment, which will not be repeated here.

[0042] Compared with the prior art, the distribution network topology optimization system disclosed in the embodiment of the present invention firstly constructs a distribution network topology model for a real distribution network, and obtains several topology optimization schemes when the real distribution network needs to be optimized in topology; then, each topology optimization scheme is used to optimize the topology of the virtual distribution network in the distribution network topology model, and the communication signal quality index and the power reliability index corresponding to the optimized topology of the virtual distribution network are calculated; wherein the communication signal quality index is used to characterize the communication reliability of the virtual intelligent switch in the distribution network topology model, and the power reliability index is used to characterize the power supply reliability of the virtual distribution network; then, with the goal of achieving the best communication signal quality index and the best power reliability index, the best optimization scheme is selected from all topology optimization schemes; finally, the topology of the real distribution network is optimized according to the best optimization scheme. It can be seen that the embodiment of the present invention calculates the corresponding communication signal quality index and power reliability index after the topology structure of the distribution network is optimized by adopting various topology optimization schemes respectively, and screens out the best optimization scheme to optimize the topology structure of the distribution network by comprehensively analyzing the communication signal quality index and the power reliability index, which ensures the communication quality of the intelligent switch to a certain extent, and then ensures the accuracy of the collected power parameters, thereby ensuring the reliability of the optimization of the topology structure of the distribution network.

[0043] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A distribution network topology optimization method, characterized in that: include: Construct distribution network topology model; When the real distribution network needs to be optimized in topology, several topology optimization schemes are obtained; Optimizing the topology of the virtual distribution network in the distribution network topology model according to the topology optimization scheme, and calculating the communication signal quality index and the power reliability index after optimizing the topology of the virtual distribution network; the communication signal quality index is used to characterize the communication reliability of the virtual intelligent switch in the distribution network topology model, and the power reliability index is used to characterize the power supply reliability of the virtual distribution network; Taking the best communication signal quality index and the best power reliability index as the goal, selecting the best optimization scheme from all the topology optimization schemes; The topology of the real power distribution network is optimized according to the best optimization scheme.

2. The method for optimizing the distribution network topology according to claim 1, characterized in that: The method of selecting the best optimization scheme from all the topology optimization schemes with the goal of optimizing the communication signal quality index and the power reliability index comprises: Normalizing the communication signal quality indicator to obtain a normalized communication quality indicator; Normalizing the power reliability index to obtain a normalized power supply reliability index; Performing weighted summation on the normalized communication quality index and the normalized power supply reliability index to obtain a comprehensive optimization value; A topology optimization scheme with the largest comprehensive optimization value is selected from all the topology optimization schemes to serve as the best optimization scheme.

3. The method for optimizing the topology of a distribution network according to claim 1, characterized in that: The topology optimization solution is obtained by: Obtaining power parameters of the distribution network collected in real time by real intelligent switches in the real distribution network; When the real intelligent switch detects that a fault exists in the real power distribution network, several topology optimization schemes are generated according to the power parameters of the power distribution network.

4. The method for optimizing the topology of a distribution network according to claim 1, characterized in that: After selecting the best optimization scheme from all the topology optimization schemes with the goal of optimizing the communication signal quality index and the power reliability index, the method further includes: When the communication signal quality indicator corresponding to the best optimization solution does not meet the preset communication quality requirement, adjusting the communication parameters of the virtual intelligent switch until the communication signal quality indicator meets the communication quality requirement; After the topology of the real distribution network is optimized according to the optimal optimization scheme, the method further includes: The communication parameters of the real smart switch in the real power distribution network are set according to the adjusted communication parameters of the virtual smart switch.

5. The method for optimizing the topology of a distribution network according to claim 1, characterized in that: After the topology of the real distribution network is optimized according to the optimal optimization scheme, the method further includes: Monitoring real-time communication signals of real smart switches in the real power distribution network; When the signal-to-noise ratio of the real-time communication signal is less than a preset signal-to-noise ratio threshold, the communication parameters of the real intelligent switch are adjusted so that the signal-to-noise ratio of the real-time communication signal is not less than the signal-to-noise ratio threshold.

6. The method for optimizing the topology of a distribution network according to claim 5, characterized in that: When the signal-to-noise ratio of the real-time communication signal is less than a preset signal-to-noise ratio threshold, adjusting the communication parameters of the real intelligent switch so that the signal-to-noise ratio of the real-time communication signal is not less than the signal-to-noise ratio threshold includes: When the signal-to-noise ratio of the real-time communication signal is less than a preset signal-to-noise ratio threshold, the communication transmission power of the real intelligent switch is gradually increased until the signal-to-noise ratio of the real-time communication signal is not less than the signal-to-noise ratio threshold.

7. The method for optimizing the topology of a distribution network according to claim 5, characterized in that: When the signal-to-noise ratio of the real-time communication signal is less than a preset signal-to-noise ratio threshold, adjusting the communication parameters of the real intelligent switch so that the signal-to-noise ratio of the real-time communication signal is not less than the signal-to-noise ratio threshold includes: When the signal-to-noise ratio of the real-time communication signal is less than a preset signal-to-noise ratio threshold, gradually increasing the communication transmission power of the real intelligent switch until the signal-to-noise ratio of the real-time communication signal is not less than the signal-to-noise ratio threshold or the communication transmission power of the real intelligent switch reaches a set power threshold; If the signal-to-noise ratio of the real-time communication signal is still less than the signal-to-noise ratio threshold when the communication transmission power reaches the set power threshold, the communication link of the real intelligent switch is switched from the current communication link to the backup communication link.

8. The method for optimizing the topology of a distribution network according to claim 7, characterized in that: The current communication link is a 5G communication link, and the backup communication link is a fiber optic communication link.

9. A distribution network topology optimization system, characterized in that: include: A model building module is used to build a distribution network topology model; The scheme acquisition module is used to obtain several topology optimization schemes when the real distribution network needs to be optimized in topology structure; An index calculation module, used to optimize the topology of the virtual distribution network in the distribution network topology model according to the topology optimization scheme, and calculate the communication signal quality index and the power reliability index after optimizing the topology of the virtual distribution network; the communication signal quality index is used to characterize the communication reliability of the virtual intelligent switch in the distribution network topology model, and the power reliability index is used to characterize the power supply reliability of the virtual distribution network; A scheme screening module, used for screening out the best optimization scheme from all the topology optimization schemes with the goal of optimizing the communication signal quality index and the power reliability index; An optimization module is used to optimize the topology of the real distribution network according to the best optimization scheme.

10. The distribution network topology optimization system according to claim 9, characterized in that: The scheme screening module is specifically used for: Normalizing the communication signal quality indicator to obtain a normalized communication quality indicator; Normalizing the power reliability index to obtain a normalized power supply reliability index; Performing weighted summation on the normalized communication quality index and the normalized power supply reliability index to obtain a comprehensive optimization value; A topology optimization scheme with the largest comprehensive optimization value is selected from all the topology optimization schemes to serve as the best optimization scheme.

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