Remote monitoring system for distribution voltage quality based on low voltage area topology

Abstract

The present invention relates to the field of power distribution management technology, and specifically to a remote monitoring system for power distribution voltage quality based on low-voltage substation topology, comprising: an upload module for uploading distribution parameters of low-voltage substation distribution lines; a construction module for acquiring the distribution parameters of low-voltage substation distribution lines uploaded in the upload module, and constructing a low-voltage substation distribution line topology based on the distribution parameters of the low-voltage substation distribution lines; an acquisition module for real-time acquisition of real-time distribution parameters of each section of distribution lines in the low-voltage substation distribution line topology. The present invention constructs a low-voltage substation distribution line topology and updates the constructed topology in real time, so that the system can have better robustness and serve the comprehensive distribution voltage quality monitoring of low-voltage substation distribution lines. In the process of distribution voltage quality monitoring, the overall distribution voltage quality of the distribution lines is reflected by capturing key distribution lines, thereby effectively improving the efficiency of distribution voltage quality monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution management, and in particular to a remote monitoring system for power distribution voltage quality based on low-voltage station area topology. Background Art

[0002] As a huge network for transmitting energy, the power system requires metering and collection facilities to monitor the operation of the entire network, from the power generation side to the transmission lines to the low-voltage distribution network and then to the power consumption side of residential users and industrial loads. Compared with the transmission network and the distribution network, the number of substations has increased exponentially, and the network characteristics of each substation are completely different. The monitoring and dispatching of substations has always been a "blind spot" of the power grid. Traditional smart meters and other equipment only collect power information from each load point of the terminal, and the management and utilization of terminal equipment is still in its infancy.

[0003] However, in the process of daily power distribution in the current power system, the quality of the distribution voltage of the distribution line will directly affect the power consumption experience of the power users. However, the quality of the distribution voltage of the distribution line is often interfered by various factors and has poor reliability. Although there is a technology for monitoring the distribution status of the power distribution line of the power system to monitor the power distribution stability of the power system, the intelligence level is poor and the monitoring effect is not comprehensive. When the distribution line is changed, it needs to be re-debugged;

[0004] To this end, we propose a remote monitoring system for distribution voltage quality based on low-voltage station area topology. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a remote monitoring system for distribution voltage quality based on low-voltage substation topology, which solves the technical problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The distribution voltage quality remote monitoring system based on low-voltage area topology includes:

[0008] An upload module is used to upload the distribution parameters of the low-voltage distribution line in the substation; a construction module is used to obtain the distribution parameters of the low-voltage distribution line in the substation uploaded in the upload module, and to construct the low-voltage distribution line topology based on the distribution parameters of the low-voltage distribution line in the substation; a collection module is used to collect the real-time distribution parameters of each section of the distribution line in the low-voltage distribution line topology in real time, and configure the collected real-time distribution parameters of each section of the distribution line to the corresponding position in the low-voltage distribution line topology; an analysis module is used to traverse the low-voltage distribution line topology, and analyze the key distribution lines based on the low-voltage distribution line topology; a retrieval module is used to receive the key distribution lines analyzed in the analysis module, and retrieve the distribution parameters of the key distribution lines; an evaluation module is used to obtain the distribution parameters of the key distribution lines retrieved in the retrieval module, and evaluate the distribution quality of the low-voltage distribution lines based on the distribution parameters of the key distribution lines.

[0009] Furthermore, the upload module is internally provided with submodules, including:

[0010] The storage unit is used to receive the low-voltage distribution line distribution parameters uploaded by the upload module;

[0011] Among them, when the construction module runs to obtain the distribution parameters of the low-voltage substation distribution line, it is obtained in the storage unit. The low-voltage substation distribution line distribution parameters uploaded in the upload module are manually uploaded by the system-side user. The construction module traverses in real time whether there are newly uploaded low-voltage substation distribution line distribution parameters in the storage unit. When traversing to the newly uploaded low-voltage substation distribution line distribution parameters, a local low-voltage substation distribution line topology is constructed based on the newly uploaded low-voltage substation distribution line distribution parameters, and the local low-voltage substation distribution line topology is combined with the low-voltage substation distribution line topology constructed last time to obtain a set of new low-voltage substation distribution line topologies.

[0012] Furthermore, the distribution parameters of the low-voltage distribution line in the area, i.e., the location information of each section of the distribution line, the construction module is interconnected based on the location information of each section of the distribution line in the stage of constructing the low-voltage distribution line topology to construct the low-voltage distribution line topology;

[0013] Among them, after the low-voltage substation distribution line topology is constructed, the low-voltage substation distribution line topology is simultaneously placed in the electronic map of the corresponding area of ​​the low-voltage substation, so that the location information of any point on the low-voltage substation distribution line topology can be read in the electronic map where it is located.

[0014] Furthermore, the real-time distribution parameters of each section of the distribution line in the low-voltage distribution line topology collected by the collection module are derived from the distribution equipment installed on each section of the distribution line in the low-voltage distribution line topology, and the distribution parameters include: distribution line voltage, distribution line harmonic content, and three-phase imbalance of the distribution line;

[0015] The acquisition module is provided with submodules at the lower level, including:

[0016] The cloud database is used to receive the real-time power distribution parameters of each section of the power distribution line in the low-voltage distribution line topology collected by the collection module, and store the real-time power distribution parameters of each section of the power distribution line;

[0017] A binding unit, used to bind the cloud database to a specified location in the low-voltage distribution line topology;

[0018] There are several groups of cloud databases, and each group of cloud databases only stores the real-time power distribution parameters of a section of the power distribution line.

[0019] Furthermore, when the power distribution parameters are transmitted to the cloud database and stored in the cloud database, the power distribution parameters are synchronously marked with location information, and the location information marked with the power distribution parameters is the location information of the power distribution equipment from which the power distribution parameters are derived. After storing the power distribution parameters, the cloud database is synchronously named with the location information marked with the power distribution parameters;

[0020] When the binding unit binds the cloud database to the specified location in the low-voltage distribution line topology, the location information corresponding to the cloud database name is searched in the low-voltage distribution line topology, and a hyperlink is set at the location found in the low-voltage distribution line topology. The system user traverses the low-voltage distribution line topology, selects and clicks the hyperlink in the low-voltage distribution line topology, jumps to the corresponding cloud database, and reads the distribution parameters of the distribution line section where the hyperlink is located in the cloud database.

[0021] Furthermore, during the operation phase of the analysis module, when it is a critical power distribution line, it complies with:

[0022] Identify the number of upper and lower distribution lines of each distribution line in the low-voltage distribution line topology;

[0023] Obtain distribution lines with at least one upper-level distribution line and at least three lower-level distribution lines, and use the obtained distribution lines as key distribution lines analyzed by the analysis module;

[0024] Among them, the analysis module analyzes the operation of key distribution lines based on the update of the low-voltage distribution line topology, synchronously refreshes the operation, and analyzes the key distribution lines again.

[0025] Furthermore, during the operation phase of the retrieval module, the storage status of the distribution parameters of the distribution lines in the cloud database is synchronously monitored. When the distribution parameters of the distribution lines are newly stored in the cloud database, the module is run again to perform the re-retrieval of the distribution parameters of the key distribution lines.

[0026] Furthermore, the evaluation module is provided with submodules at the lower level, including:

[0027] A monitoring unit, used to record the evaluation results of the power distribution quality of the low-voltage distribution line in the evaluation module, and store the evaluation results of the power distribution quality of the low-voltage distribution line in the evaluation module based on the time sequence;

[0028] The evaluation logic of the power distribution quality of the low-voltage distribution line in the evaluation module is expressed as follows:

[0029]

[0030] Where: Q is the distribution quality evaluation value of a group of distribution lines in the low-voltage distribution line area; n is the total number of times the distribution parameters are stored in the cloud database corresponding to the distribution line; v i is the voltage of the distribution line in the i-th stored distribution parameters; ε U is the three-phase imbalance of the distribution line in the distribution parameters stored for the i-th time; V1 is the effective value of the fundamental wave in the distribution parameters stored in the cloud database corresponding to the distribution line; V i+1 is the effective value of the harmonics of the distribution line in the distribution parameters stored for the i+1th time; Q 综 Q is the comprehensive distribution quality evaluation value of the low-voltage distribution line; max It is the maximum value of the distribution quality evaluation value of each distribution line in the low-voltage distribution line area; Q min It is the minimum value of the power distribution quality evaluation values ​​of each distribution line in the low-voltage distribution line area;

[0031] Among them, the smaller Q is, the better the power distribution quality of the corresponding distribution line is; conversely, the worse the power distribution quality of the corresponding distribution line is. 综 The smaller it is, the better the power distribution quality of the low-voltage distribution line is. Conversely, the worse the power distribution quality of the low-voltage distribution line is.

[0032] Furthermore, the three-phase imbalance degree ε of the distribution line U The calculation formula is:

[0033]

[0034] Where: U max is the maximum value of the three-phase voltage of the distribution line; U min It is the minimum value of the three-phase voltage of the distribution line;

[0035] Among them, the three-phase unbalance degree ε of the distribution line U The larger the value is, the worse the power distribution quality of the distribution line is; conversely, the smaller the value is, the better the power distribution quality of the distribution line is.

[0036] Furthermore, the upload module is electrically connected to a storage unit via a medium, the upload module is interactively connected to a construction module via a wireless network, the construction module is interactively connected to the storage unit via a wireless network, the construction module is interactively connected to a collection module via a wireless network, the collection module is interactively connected to a cloud database and a binding unit via a wireless network, the collection module is interactively connected to an analysis module, a retrieval module and an evaluation module via a wireless network, and the evaluation module is interactively connected to a monitoring unit via a wireless network.

[0037] Compared with the known public technology, the technical solution provided by the present invention has the following advantages:

[0038] Beneficial effects:

[0039] The present invention provides a remote monitoring system for distribution voltage quality based on low-voltage substation topology. During operation, the system constructs a low-voltage substation distribution line topology and updates the constructed topology in real time, so that the system can have better robustness to serve the comprehensive distribution voltage quality monitoring of the low-voltage substation distribution lines. In the process of distribution voltage quality monitoring, the key distribution lines are captured to reflect the overall distribution voltage quality of the distribution lines, which effectively improves the distribution voltage quality monitoring efficiency. In this way, each distribution line in the low-voltage substation distribution line topology is monitored in real time, which is beneficial to the long-term stability of the operation of the low-voltage substation distribution lines and brings a better power consumption experience to the power users served by the low-voltage substation distribution lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 It is a structural diagram of the remote monitoring system for distribution voltage quality based on low-voltage substation topology. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0043] The present invention will be further described below in conjunction with the embodiments.

[0044] Embodiment 1:

[0045] The remote monitoring system for power distribution voltage quality based on low voltage area topology of this embodiment is as follows: Figure 1 As shown, including:

[0046] Upload module, used to upload the distribution parameters of low-voltage distribution lines;

[0047] The upload module has submodules, including:

[0048] The storage unit is used to receive the low-voltage distribution line distribution parameters uploaded by the upload module;

[0049] Among them, when the construction module runs to obtain the distribution parameters of the low-voltage distribution line in the substation, the parameters are obtained in the storage unit. The low-voltage distribution line in the substation uploaded in the upload module are manually uploaded by the system end user. The construction module traverses in real time whether there are newly uploaded low-voltage distribution line parameters in the storage unit. When traversing to the newly uploaded low-voltage distribution line parameters, the local low-voltage distribution line topology is constructed based on the newly uploaded low-voltage distribution line parameters, and the local low-voltage distribution line topology is combined with the low-voltage distribution line topology constructed last time to obtain a set of new low-voltage distribution line topologies;

[0050] A construction module is used to obtain the distribution parameters of the low-voltage distribution line uploaded in the upload module, and to construct a low-voltage distribution line topology based on the distribution parameters of the low-voltage distribution line;

[0051] The acquisition module is used to collect the real-time distribution parameters of each section of the distribution line in the low-voltage distribution line topology in real time, and configure the collected real-time distribution parameters of each section of the distribution line to the corresponding position in the low-voltage distribution line topology;

[0052] The real-time distribution parameters of each section of the low-voltage distribution line topology collected by the collection module are derived from the distribution equipment installed on each section of the distribution line topology of the low-voltage distribution line. The distribution parameters include: distribution line voltage, distribution line harmonic content, and three-phase imbalance of the distribution line.

[0053] The acquisition module is equipped with submodules, including:

[0054] The cloud database is used to receive the real-time power distribution parameters of each section of the power distribution line in the low-voltage distribution line topology collected by the collection module, and store the real-time power distribution parameters of each section of the power distribution line;

[0055] A binding unit, used to bind the cloud database to a specified location in the low-voltage distribution line topology;

[0056] Among them, the cloud database is set with several groups, and each group of cloud database only stores the real-time power distribution parameters of a section of the power distribution line;

[0057] An analysis module is used to traverse the low-voltage distribution line topology and analyze key distribution lines based on the low-voltage distribution line topology;

[0058] A calling module is used to receive the key power distribution lines analyzed in the analysis module and call the power distribution parameters of the key power distribution lines;

[0059] An evaluation module is used to obtain the key distribution line distribution parameters retrieved in the retrieval module, and evaluate the distribution quality of the low-voltage distribution line based on the key distribution line distribution parameters;

[0060] The evaluation module is divided into submodules, including:

[0061] A monitoring unit, used to record the evaluation results of the power distribution quality of the low-voltage distribution line in the evaluation module, and store the evaluation results of the power distribution quality of the low-voltage distribution line in the evaluation module based on the time sequence;

[0062] The evaluation logic of the power distribution quality of low-voltage distribution lines in the evaluation module is expressed as follows:

[0063]

[0064] Where: Q is the distribution quality evaluation value of a group of distribution lines in the low-voltage distribution line area; n is the total number of times the distribution parameters are stored in the cloud database corresponding to the distribution line; v i is the voltage of the distribution line in the i-th stored distribution parameters; ε U is the three-phase imbalance of the distribution line in the distribution parameters stored for the i-th time; V1 is the effective value of the fundamental wave in the distribution parameters stored in the cloud database corresponding to the distribution line; V i+1 is the effective value of the harmonics of the distribution line in the distribution parameters stored for the i+1th time; Q 综 Q is the comprehensive distribution quality evaluation value of the low-voltage distribution line; max It is the maximum value of the distribution quality evaluation value of each distribution line in the low-voltage distribution line area; Q min It is the minimum value of the power distribution quality evaluation values ​​of each distribution line in the low-voltage distribution line area;

[0065] Among them, the smaller Q is, the better the power distribution quality of the corresponding distribution line is; conversely, the worse the power distribution quality of the corresponding distribution line is. 综 The smaller it is, the better the power distribution quality of the low-voltage distribution line is; conversely, the worse the power distribution quality of the low-voltage distribution line is.

[0066] Three-phase unbalance of distribution line ε U The calculation formula is:

[0067]

[0068] Where: U max is the maximum value of the three-phase voltage of the distribution line; U min It is the minimum value of the three-phase voltage of the distribution line;

[0069] Among them, the three-phase unbalance degree ε of the distribution line U The larger the value, the worse the power distribution quality of the distribution line; conversely, the smaller the value, the better the power distribution quality of the distribution line.

[0070] The upload module is electrically connected to the storage unit through a medium, the upload module is interactively connected to the construction module through a wireless network, the construction module is interactively connected to the storage unit through a wireless network, the construction module is interactively connected to the acquisition module through a wireless network, the acquisition module is interactively connected to a cloud database and a binding unit through a wireless network, the acquisition module is interactively connected to an analysis module, a retrieval module and an evaluation module through a wireless network, and the evaluation module is interactively connected to a monitoring unit through a wireless network.

[0071] In this embodiment, the upload module runs to upload the distribution parameters of the low-voltage distribution line in the substation, the storage unit synchronously receives the distribution parameters of the low-voltage distribution line in the substation uploaded in the upload module, the construction module runs to obtain the distribution parameters of the low-voltage distribution line in the substation uploaded in the upload module, and the low-voltage distribution line topology is constructed based on the distribution parameters of the low-voltage distribution line in the substation. The acquisition module further collects the real-time distribution parameters of each section of the distribution line in the low-voltage distribution line topology in real time, and configures the collected real-time distribution parameters of each section of the distribution line to the corresponding position in the low-voltage distribution line topology. The cloud database synchronously receives the low-voltage distribution line in the substation collected by the acquisition module. The real-time distribution parameters of each section of the distribution line in the power line topology are stored. The binding unit binds the cloud database to the specified position in the low-voltage distribution line topology in real time. The analysis module runs post-processing to traverse the low-voltage distribution line topology, and analyzes the key distribution lines based on the low-voltage distribution line topology. The retrieval module receives the key distribution lines analyzed in the analysis module and retrieves the distribution parameters of the key distribution lines. Finally, the evaluation module obtains the distribution parameters of the key distribution lines retrieved in the retrieval module, and evaluates the distribution quality of the low-voltage distribution lines based on the distribution parameters of the key distribution lines.

[0072] Through the system in the above embodiment, a distribution voltage quality monitoring with robustness, good intelligence and comprehensive monitoring effect is provided for the low-voltage distribution line.

[0073] Embodiment 2:

[0074] In terms of specific implementation, based on Example 1, this example refers to Figure 1 The distribution voltage quality remote monitoring system based on the low-voltage area topology in Example 1 is further described in detail:

[0075] The distribution parameters of the low-voltage distribution line are the location information of each section of the distribution line. When constructing the low-voltage distribution line topology, the construction module connects the sections of the distribution line to each other based on the location information of each section of the distribution line to construct the low-voltage distribution line topology.

[0076] Among them, after the low-voltage substation distribution line topology is constructed, the low-voltage substation distribution line topology is simultaneously placed in the electronic map of the corresponding area of ​​the low-voltage substation, so that the location information of any point on the low-voltage substation distribution line topology can be read in the electronic map where it is located.

[0077] Through the above settings, the low-voltage distribution line topology is further processed so that the low-voltage distribution line topology has a reference, so that the position of any point in the low-voltage distribution line topology can be read.

[0078] like Figure 1 As shown, when the power distribution parameters are transmitted to the cloud database and stored in the cloud database, the power distribution parameters are synchronously marked with location information. The location information marked with the power distribution parameters is the location information of the power distribution equipment from which the power distribution parameters are derived. After the power distribution parameters are stored in the cloud database, they are synchronously named with the location information marked with the power distribution parameters.

[0079] When the binding unit binds the cloud database to the specified location in the low-voltage distribution line topology, the location information corresponding to the cloud database name is searched in the low-voltage distribution line topology, and a hyperlink is set at the location found in the low-voltage distribution line topology. The system user traverses the low-voltage distribution line topology, selects and clicks the hyperlink in the low-voltage distribution line topology, jumps to the corresponding cloud database, and reads the distribution parameters of the distribution line section where the hyperlink is located in the cloud database.

[0080] The above settings provide further interaction conditions for the cloud database and the low-voltage distribution line topology, so that system-side users can read the distribution line distribution parameters stored in the cloud database through the low-voltage distribution line topology.

[0081] Embodiment 3:

[0082] In terms of specific implementation, based on Example 1, this example refers to Figure 1 The distribution voltage quality remote monitoring system based on the low-voltage area topology in Example 1 is further described in detail:

[0083] During the operation phase of the analysis module, when the key distribution lines are in operation, the following shall be followed:

[0084] Identify the number of upper and lower distribution lines of each distribution line in the low-voltage distribution line topology;

[0085] Obtain distribution lines with at least one upper-level distribution line and at least three lower-level distribution lines, and use the obtained distribution lines as key distribution lines analyzed by the analysis module;

[0086] Among them, the analysis module analyzes the operation of key distribution lines based on the update of the low-voltage distribution line topology, synchronously refreshes the operation, and analyzes the key distribution lines again.

[0087] Through the above settings, the logic of the analysis module running to analyze key distribution lines is further limited.

[0088] like Figure 1 As shown, during the operation phase of the retrieval module, the storage status of the distribution parameters of the distribution lines in the cloud database is synchronously monitored. When the distribution parameters of the distribution lines are newly stored in the cloud database, the module is run again to perform the re-retrieval of the distribution parameters of the key distribution lines.

[0089] Through the above settings, a further continuous operation logic is provided for the system in Example 1, so that the system can continue to operate based on the continuous operation logic and perform real-time distribution voltage quality monitoring for the low-voltage distribution lines.

[0090] In summary, during the operation of the system in the above embodiment, by constructing a low-voltage distribution line topology and updating the constructed topology in real time, the system can have better robustness to serve the comprehensive distribution voltage quality monitoring of the low-voltage distribution lines in the substation, and in the process of distribution voltage quality monitoring, the key distribution lines are captured to reflect the overall distribution voltage quality of the distribution lines, which effectively improves the efficiency of distribution voltage quality monitoring. In this way, each distribution line in the low-voltage distribution line topology is monitored in real time, which is beneficial to the long-term stability of the operation of the low-voltage distribution lines and brings a better power consumption experience to the power users served by the low-voltage distribution lines.

[0091] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A remote monitoring system for distribution voltage quality based on low-voltage area topology, characterized in that: include: Upload module, used to upload the distribution parameters of low-voltage distribution lines; A construction module is used to obtain the distribution parameters of the low-voltage distribution line uploaded in the upload module, and to construct a low-voltage distribution line topology based on the distribution parameters of the low-voltage distribution line; The acquisition module is used to collect the real-time distribution parameters of each section of the distribution line in the low-voltage distribution line topology in real time, and configure the collected real-time distribution parameters of each section of the distribution line to the corresponding position in the low-voltage distribution line topology; An analysis module is used to traverse the low-voltage distribution line topology and analyze key distribution lines based on the low-voltage distribution line topology; A calling module is used to receive the key power distribution lines analyzed in the analysis module and call the power distribution parameters of the key power distribution lines; An evaluation module is used to obtain the key distribution line distribution parameters retrieved in the retrieval module, and evaluate the distribution quality of the low-voltage distribution line based on the key distribution line distribution parameters; The upload module is internally provided with submodules, including: The storage unit is used to receive the low-voltage distribution line distribution parameters uploaded by the upload module; Among them, when the construction module runs to obtain the distribution parameters of the low-voltage distribution line in the substation, the parameters are obtained in the storage unit. The low-voltage distribution line in the substation uploaded in the upload module is manually uploaded by the system end user. The construction module traverses in real time whether there are new uploaded low-voltage distribution line parameters in the storage unit. When traversing to the new uploaded low-voltage distribution line parameters, the local low-voltage distribution line topology is constructed based on the new uploaded low-voltage distribution line parameters, and the local low-voltage distribution line topology is combined with the low-voltage distribution line topology constructed last time to obtain a set of new low-voltage distribution line topologies; The distribution parameters of the low-voltage distribution line in the substation are the location information of each section of the distribution line. In the stage of constructing the topology of the low-voltage distribution line in the substation, the construction module is interconnected based on the location information of each section of the distribution line to construct the topology of the low-voltage distribution line in the substation; Among them, after the low-voltage distribution line topology is constructed, the low-voltage distribution line topology is simultaneously placed in the electronic map of the corresponding area of ​​the low-voltage distribution line, so that the location information of any point on the low-voltage distribution line topology can be read in the electronic map where it is located; When the power distribution parameters are transmitted to the cloud database and stored in the cloud database, the power distribution parameters are synchronously marked with location information. The location information marked with the power distribution parameters is the location information of the power distribution equipment from which the power distribution parameters are derived. After the power distribution parameters are stored in the cloud database, they are synchronously named with the location information marked with the power distribution parameters. When the binding unit binds the cloud database to the designated location in the low-voltage distribution line topology, the cloud database name is used to search the low-voltage distribution line topology with the location information corresponding to the cloud database name, and a hyperlink is set at the location found in the low-voltage distribution line topology. The system end user traverses the low-voltage distribution line topology, selects and clicks the hyperlink in the low-voltage distribution line topology, jumps to the corresponding cloud database, and reads the distribution parameters of the distribution line section where the hyperlink is located in the cloud database; The evaluation module is provided with submodules at the lower level, including: A monitoring unit, used to record the evaluation results of the power distribution quality of the low-voltage distribution line in the evaluation module, and store the evaluation results of the power distribution quality of the low-voltage distribution line in the evaluation module based on the time sequence; The evaluation logic of the power distribution quality of the low-voltage distribution line in the evaluation module is expressed as follows: Where: Q is the distribution quality evaluation value of a group of distribution lines in the low-voltage distribution line area; n is the total number of times the distribution parameters are stored in the cloud database corresponding to the distribution line; vi is the voltage of the distribution line in the i-th stored distribution parameter; ε U is the three-phase imbalance of the distribution line in the distribution parameters stored for the i-th time; V1 is the effective value of the fundamental wave in the distribution parameters stored in the cloud database corresponding to the distribution line; V i+1 is the effective value of the harmonics of the distribution line in the distribution parameters stored for the i+1th time; Q 综 Q is the comprehensive distribution quality evaluation value of the low-voltage distribution line; max It is the maximum value of the distribution quality evaluation value of each distribution line in the low-voltage distribution line area; Q min It is the minimum value of the power distribution quality evaluation values ​​of each distribution line in the low-voltage distribution line area; Among them, the smaller Q is, the better the power distribution quality of the corresponding distribution line is; conversely, the worse the power distribution quality of the corresponding distribution line is. 综 The smaller it is, the better the power distribution quality of the low-voltage distribution line is. Conversely, the worse the power distribution quality of the low-voltage distribution line is.

2. The remote monitoring system for power distribution voltage quality based on low voltage area topology according to claim 1 is characterized in that: The real-time distribution parameters of each section of the distribution line in the low-voltage distribution line topology collected by the collection module are derived from the distribution equipment installed on each section of the distribution line in the low-voltage distribution line topology, and the distribution parameters include: distribution line voltage, distribution line harmonic content, and three-phase imbalance of the distribution line; The acquisition module is provided with submodules at the lower level, including: The cloud database is used to receive the real-time power distribution parameters of each section of the power distribution line in the low-voltage distribution line topology collected by the collection module, and store the real-time power distribution parameters of each section of the power distribution line; A binding unit, used to bind the cloud database to a specified location in the low-voltage distribution line topology; There are several groups of cloud databases, and each group of cloud databases only stores the real-time power distribution parameters of a section of the power distribution line.

3. The remote monitoring system for power distribution voltage quality based on low voltage area topology according to claim 1 is characterized in that: During the operation phase of the analysis module, when on a critical distribution line, the following shall apply: Identify the number of upper and lower distribution lines of each distribution line in the low-voltage distribution line topology; Obtain distribution lines with at least one upper-level distribution line and at least three lower-level distribution lines, and use the obtained distribution lines as key distribution lines analyzed by the analysis module; Among them, the analysis module analyzes the operation of key distribution lines based on the update of the low-voltage distribution line topology, synchronously refreshes the operation, and analyzes the key distribution lines again.

4. The remote monitoring system for power distribution voltage quality based on low voltage area topology according to claim 1 is characterized in that: During the operation phase of the retrieval module, the storage status of the distribution parameters of the distribution lines in the cloud database is synchronously monitored. When the distribution parameters of the distribution lines are newly stored in the cloud database, the module is run again to perform the re-retrieval of the distribution parameters of the key distribution lines.

5. The remote monitoring system for power distribution voltage quality based on low voltage area topology according to claim 1 is characterized in that: The three-phase unbalance degree ε of the distribution line U The calculation formula is: Where: U max is the maximum value of the three-phase voltage of the distribution line; U min It is the minimum value of the three-phase voltage of the distribution line; Among them, the three-phase unbalance degree ε of the distribution line U The larger the value is, the worse the power distribution quality of the distribution line is; conversely, the smaller the value is, the better the power distribution quality of the distribution line is.

6. The remote monitoring system for power distribution voltage quality based on low voltage area topology according to claim 1 is characterized in that: The upload module is electrically connected to a storage unit via a medium, the upload module is interactively connected to a construction module via a wireless network, the construction module is interactively connected to the storage unit via a wireless network, the construction module is interactively connected to a collection module via a wireless network, the collection module is interactively connected to a cloud database and a binding unit via a wireless network, the collection module is interactively connected to an analysis module, a retrieval module and an evaluation module via a wireless network, and the evaluation module is interactively connected to a monitoring unit via a wireless network.

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