Intelligent management control system and method of power distribution system

Abstract

The invention discloses an intelligent management control system and method for a power distribution system, is applied to the technical field of power distribution systems, and is used for solving the problem that in the prior art, a monitoring system of an existing power distribution system does not have the capability of regulating and controlling the power distribution system in real time according to collected data. The method specifically comprises the steps that a central processing platform evaluates the power distribution system according to power data, temperature data and harmonic data, collected by a data collection module, of the power distribution system, and an operation evaluation result of the power distribution system is obtained; wherein the operation evaluation result comprises an electric energy quality evaluation result and a device operation evaluation result; the power distribution system is subjected to hierarchical regulation and control according to the grades in the electric energy quality evaluation result and the device operation evaluation result, and the power distribution system can be subjected to real-time regulation and control according to the collected data by forming a real-time response chain of'monitoring-evaluation-regulation and control ', so that the operation efficiency and reliability of the power distribution system are improved.

Description

Technical Field

[0001] This application relates to the technical field of distribution systems, and in particular, to an intelligent management and control system and method for a distribution system. Background Art

[0002] The distribution system is an important part of modern power supply, and its stability and reliability directly affect the power consumption experience of users and the operation efficiency of power companies. With the continuous growth of power demand and the development of distributed energy and smart grid technologies, the complexity of the distribution system has also increased. To ensure the normal operation of the distribution system, monitoring systems are widely used to collect various data in the distribution system in real time, such as voltage, current, power, etc.

[0003] Currently, the monitoring of the distribution system mainly collects the operation data in the distribution system through sensors and monitoring devices, and transmits the data to the controller for analysis and display. However, the main functions of the existing monitoring systems for distribution systems are limited to data collection, display and alarm, and simple threshold judgment, lacking the ability to deeply analyze and intelligently process the collected data. Specifically, the existing monitoring systems cannot automatically adjust the operation parameters of the distribution system according to the detected data changes to cope with load fluctuations or fault conditions, so as to achieve real-time regulation of the distribution system. Summary of the Invention

[0004] This application provides an intelligent management and control system and method for a distribution system to solve the problem in the prior art that the existing monitoring system for a distribution system does not have the ability to perform real-time regulation on the distribution system according to the collected data.

[0005] The technical solutions provided by this application are as follows:

[0006] In a first aspect, the present invention provides an intelligent management and control system for a distribution system. The distribution system includes multiple distribution branches respectively connected to a high-voltage power source. Each distribution branch includes a transformer, high-voltage side switchgear, and low-voltage side switchgear; the transformer is connected to the high-voltage power source through a transmission line and the high-voltage side switchgear, and the transformer is connected to each load through a transmission line and the low-voltage side switchgear;

[0007] The intelligent management and control system for the distribution system includes: a data acquisition module and a central processing platform; the data acquisition module is communicatively connected to the central processing platform;

[0008] The data acquisition module is used to acquire the power data, temperature data, and harmonic data of the distribution system;

[0009] A central processing platform is used to evaluate a power distribution system based on power data, temperature data, and harmonic data to obtain an operation evaluation result of the power distribution system. Among them, the operation evaluation result includes a power quality evaluation result and a device operation evaluation result. The power distribution system is hierarchically regulated according to the levels in the power quality evaluation result and the device operation evaluation result.

[0010] Optionally, the central processing platform is specifically used for:

[0011] Determine the input unbalance degree of each transformer and the voltage variation data of each load end in the power distribution system according to the power data of the power distribution system;

[0012] Evaluate the input unbalance degree of each transformer, the voltage variation data of each load end, and the harmonic data according to a preset power evaluation standard to obtain the current voltage fluctuation score, the current three-phase power balance score, and the current noise score of each distribution branch in the power distribution system;

[0013] Perform a weighted sum of the current voltage fluctuation score, the current three-phase power balance score, and the current noise score of each distribution branch in the power distribution system to obtain the current power quality comprehensive score of each distribution branch;

[0014] Based on the correspondence between the power quality level and the power quality comprehensive score interval, determine the power quality level corresponding to the power quality comprehensive score interval where the current power quality comprehensive score is located as the current power quality level of each distribution branch;

[0015] Take the current power quality level of each distribution branch as the power quality evaluation result.

[0016] Optionally, the central processing platform is specifically used for:

[0017] Evaluate the power data and temperature data of the power distribution system according to a preset fault evaluation standard to obtain the current fault device identifier, the current fault type, and the current fault level in the power distribution system, and take the current fault device identifier, the current fault type, and the current fault level in the power distribution system as the device operation evaluation result.

[0018] Optionally, the central processing platform is specifically used for:

[0019] When the current power quality level of a distribution branch is higher than the first quality level threshold and lower than the second quality level threshold, take the weighted scoring item with the highest proportion in the current power quality comprehensive score corresponding to the current power quality level as the target scoring item; execute the adjustment method corresponding to the score and the scoring type before the weighting corresponding to the target scoring item;

[0020] When the current power quality level of the distribution branch is higher than the second quality level threshold, disconnect the corresponding distribution branch from the high-voltage power source and the load.

[0021] Optionally, the central processing platform is specifically configured to:

[0022] If the current fault type belongs to an adjustable fault, when the current fault level is lower than the first fault level threshold, execute the adjustment measures corresponding to the current fault type and the current fault level; when the current fault level is not lower than the first fault level threshold, disconnect the faulty device from the high-voltage power source and / or the load;

[0023] If the current fault type belongs to a non-adjustable fault, when the current fault level is higher than the first fault level threshold, disconnect the faulty device from the high-voltage power source and / or the load.

[0024] Optionally, the data acquisition module includes: an input power acquisition module, a transformer power acquisition module, a load-end power acquisition module, a line temperature acquisition module, a transformer temperature acquisition module, and a harmonic acquisition module; the input power acquisition module, the transformer power acquisition module, the load-end power acquisition module, the line temperature acquisition module, the transformer temperature acquisition module, and the harmonic acquisition module are respectively connected to the central processing platform;

[0025] The input power acquisition module is arranged on the transmission line between the high-voltage side switchgear and the high-voltage power source; the input power acquisition module is used to acquire the power data input from the high-voltage power source to the power distribution system;

[0026] The load-end power acquisition module is arranged on the transmission line between the low-voltage side switchgear and the load; the load-end power acquisition module is used to acquire the power data output from the power distribution system to the load;

[0027] The transformer power acquisition module is respectively arranged on the transmission lines between the transformer and the high-voltage side switchgear and the low-voltage side switchgear; the transformer power acquisition module is used to acquire the power data on the primary side and the secondary side of the transformer;

[0028] The line temperature acquisition module is respectively arranged on each transmission line, and the line temperature acquisition module is used to acquire the temperature data of the transmission line;

[0029] The transformer temperature acquisition module is arranged on each transformer; the transformer temperature acquisition module is used to acquire the temperature data of the transformer;

[0030] The harmonic acquisition module is arranged on the transmission line between the low-voltage side switchgear and each load; the harmonic acquisition module is used to acquire the harmonic data input by the load.

[0031] Optionally, the intelligent management and control system of the power distribution system further includes: a display and control platform; the display and control platform is communicatively connected to the central processing platform;

[0032] The display and control platform is configured to receive and display the power quality evaluation result and the device operation evaluation result sent by the central processing platform; and determine the current aging degree score of each device in the power distribution system according to the power quality evaluation result and the device operation evaluation result within a preset time; when there is a current aging degree score greater than the preset score threshold among the current aging degree scores of each device, generate an aging replacement prompt based on the current aging degree score greater than the preset score threshold and the corresponding device identifier.

[0033] Optionally, the intelligent management and control system of the power distribution system further includes: a storage module; the storage module is connected to the central processing platform;

[0034] The central processing platform is configured to obtain the version upgrade file sent by the display and control platform, and store the version upgrade file in the storage module; after receiving the update instruction sent by the display and control platform, determine the update version identifier in the update instruction, obtain the version upgrade file corresponding to the update version identifier from the storage module as the target upgrade file, and perform the upgrade operation of the intelligent management and control system based on the target upgrade file.

[0035] In a second aspect, the present invention provides an intelligent management and control method for a power distribution system, which is applied to the intelligent management and control system of the power distribution system according to any one of the foregoing embodiments, and includes:

[0036] Obtain the power data, temperature data, and harmonic data of the power distribution system;

[0037] Evaluate the power distribution system according to the power data, temperature data, and harmonic data of the power distribution system to obtain the operation evaluation result of the power distribution system; wherein, the operation evaluation result includes the power quality evaluation result and the device operation evaluation result;

[0038] Perform hierarchical regulation on the power distribution system according to the levels in the power quality evaluation result and the device operation evaluation result.

[0039] In an optional embodiment, evaluating the power distribution system according to the power data, temperature data, and harmonic data of the power distribution system to obtain the operation evaluation result of the power distribution system includes:

[0040] Determine the input unbalance degree of each transformer and the voltage variation data of each load end in the power distribution system according to the power data of the power distribution system;

[0041] According to the preset power evaluation criteria, evaluate the input imbalance of each transformer, the voltage fluctuation data and harmonic data of each load end, and obtain the current voltage fluctuation score, the current three-phase power balance score and the current noise score of each distribution branch in the distribution system;

[0042] Perform a weighted sum of the current voltage fluctuation score, the current three-phase power balance score and the current noise score of each distribution branch in the distribution system to obtain the current power quality comprehensive score of each distribution branch;

[0043] Based on the correspondence between the power quality level and the power quality comprehensive score interval, determine the power quality level corresponding to the power quality comprehensive score interval where the current power quality comprehensive score is located as the current power quality level of each distribution branch;

[0044] Take the current power quality level of each distribution branch as the power quality evaluation result.

[0045] The beneficial effects of this application are as follows:

[0046] This application sets up a data acquisition module and a central processing platform. The data acquisition module synchronously obtains the power data, temperature data and harmonic data of the distribution system. The central processing platform uses an embedded intelligent algorithm to perform fusion analysis on multi-dimensional data, evaluate the operation of devices, and perform hierarchical control according to the evaluation results, thus realizing the ability of real-time control. This application forms a real-time response chain of "monitoring-evaluation-control", which can perform real-time control on the distribution system according to the collected data, improve the operation efficiency and reliability of the distribution system, optimize the power quality through real-time control, reduce equipment failures, extend the equipment life, reduce the operation and maintenance costs, and improve the stability and safety of power supply.

[0047] Other features and advantages of this application will be described in the subsequent description, and part of them can be made obvious from the description, or understood by implementing this application. The objectives and other advantages of this application can be achieved and obtained through the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The drawings described herein are used to provide a further understanding of this application and constitute a part of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0049] Figure 1 It is the first system framework schematic diagram of the intelligent management and control system of the distribution system in the embodiment of this application;

[0050] Figure 2 It is the schematic diagram of the structure of the data acquisition module in each distribution branch in the embodiment of this application;

[0051] Figure 3 It is the second system framework schematic diagram of the intelligent management and control system for the power distribution system in the embodiments of the present application;

[0052] Figure 4 It is the third system framework schematic diagram of the intelligent management and control system for the power distribution system in the embodiments of the present application;

[0053] Figure 5 It is the structural schematic diagram of the central processing platform in the embodiments of the present application;

[0054] Figure 6 It is the general process schematic diagram of the intelligent management and control method for the power system in the embodiments of the present application.

[0055] Icons: 100 - power distribution system; 101 - transformer; 102 - high - voltage side switchgear; 103 - low - voltage side switchgear; 110 - data acquisition module; 111 - input - end power acquisition module; 112 - transformer power acquisition module; 113 - load - end power acquisition module; 114 - line temperature acquisition module; 115 - transformer temperature acquisition module; 116 - harmonic acquisition module; 120 - central processing platform; 130 - display and control platform; 140 - storage module. Specific embodiments

[0056] In order to make the purpose, technical solutions and beneficial effects of the present application clearer and more understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0057] The embodiments of the present application provide an intelligent management and control system for a power distribution system. Among them, the power distribution system includes multiple power distribution branches respectively connected to a high - voltage power source. Each power distribution branch includes a transformer, high - voltage side switchgear, and low - voltage side switchgear; the transformer is connected to the high - voltage power source through a transmission line and high - voltage side switchgear, and the transformer is connected to each load through a transmission line and low - voltage side switchgear. Among them, the transformer is generally a three - phase transformer; refer to Figure 1 As shown, the intelligent management and control system for the power distribution system provided by the embodiments of the present application at least includes: a data acquisition module 110 and a central processing platform 120; the data acquisition module 110 is communicatively connected to the central processing platform 120;

[0058] The data acquisition module 110 is used to collect power data, temperature data, and harmonic data of the power distribution system 100;

[0059] A central processing platform 120 is configured to evaluate a power distribution system 100 based on power data, temperature data, and harmonic data to obtain an operation evaluation result of the power distribution system 100. The operation evaluation result includes a power quality evaluation result and a device operation evaluation result. The power distribution system 100 is hierarchically regulated according to the levels in the power quality evaluation result and the device operation evaluation result.

[0060] In Figure 1 In the intelligent management and control system of the power distribution system shown, a data acquisition module 110 is disposed inside the power distribution system 100, and the data acquisition module 110 can collect the power data, temperature data, and harmonic data of the power distribution system 100 in real time. The power data of the power distribution system 100 refers to the power data input from a high-voltage power source to the power distribution system 100, the power data output from the power distribution system 100 to each load, the primary-side power data of the transformer, and the secondary-side power data of the transformer. The power data refers to at least two of voltage, current, and power. The temperature data refers to the temperature of the transformer and the temperature of the transmission line. The harmonic data refers to the harmonic components input by each load connected to the power distribution system 100. For the power data, temperature data, and harmonic data of the power distribution system 100, on the one hand, indicators characterizing the power quality of the power distribution system 100 can be calculated. For example, the input imbalance of each transformer and the voltage variation data at each load end are used to evaluate the power quality of each power distribution branch of the power distribution system 100 to obtain a power quality evaluation result. The power quality evaluation result can characterize the power quality of each power distribution branch in the power distribution system 100, and the power quality evaluation result includes the current power quality level. On the other hand, according to a preset fault evaluation criterion, the power data and temperature data of the power distribution system 100 are evaluated to obtain data characterizing the operation status of each device in the power distribution system 100. For example, the current faulty device, the current fault type, and the current fault level are used as the device operation evaluation result. The device operation evaluation result is data that can characterize the operation status of each device in the power distribution system 100, and the device operation evaluation result includes the current faulty device, the current fault type, and the current fault level.

[0061] In this way, the present application is provided with a data acquisition module and a central processing platform. The data acquisition module synchronously acquires the power data, temperature data, and harmonic data of the power distribution system. The central processing platform uses an embedded intelligent algorithm to perform fusion analysis on the multi-dimensional data, conducts device operation evaluation, and performs hierarchical regulation according to the evaluation results, thereby realizing the ability of real-time regulation. The present application forms a real-time response chain of "monitoring-evaluation-regulation", which can perform real-time regulation on the power distribution system according to the acquired data, improve the operation efficiency and reliability of the power distribution system, optimize the power quality through real-time regulation, reduce equipment failures, extend the equipment life, lower the operation and maintenance costs, and improve the stability and safety of power supply.

[0062] In a possible implementation manner, when evaluating the power distribution system based on the power data, temperature data, and harmonic data to obtain the power quality evaluation result of the power distribution system, the central processing platform is specifically configured to:

[0063] First, determine the input imbalance degree of each transformer and the voltage variation data of each load end in the power distribution system according to the power data of the power distribution system.

[0064] In practical applications, the input imbalance degree of a transformer refers to the deviation degree of the primary side current or voltage of a three-phase transformer. The imbalance degree of the transformer can be determined according to the current three-phase voltage or three-phase current at the input end of the transformer. Taking the three-phase voltages V A 、V B and w C as an example, the imbalance degree of the transformer can be calculated using the following formula:

[0065]

[0066] where δ is the imbalance degree of the transformer, V max is the maximum value among the three-phase voltages V A 、V B and V C , and V avg is the average value of the three-phase voltages V A 、V B and V C .

[0067] The voltage variation data of each load end is used to characterize the voltage fluctuation condition of the power distribution system output to the load end, including the voltage variation frequency and voltage variation limit value of the power distribution system output to the load end. The voltage variation frequency is the number of times that the effective value of the voltage at the load end exceeds the rated voltage per unit time. The voltage variation limit value is the percentage of the change amount of the effective value of the voltage to the rated voltage.

[0068] Then, according to the preset power evaluation criteria, evaluate the input imbalance of each transformer, the voltage variation data and harmonic data of each load terminal, and obtain the current voltage fluctuation score, the current three-phase power balance score, and the current noise score of each distribution branch in the distribution system.

[0069] In practical applications, the preset power evaluation criteria may include the correspondence between the voltage variation data range and the voltage fluctuation score, the correspondence between the input imbalance range and the three-phase power balance score, and the correspondence between the noise data range and the noise score. According to the preset power evaluation criteria, the current voltage fluctuation score, the current three-phase power balance score, and the current noise score can be determined.

[0070] Next, perform a weighted sum of the current voltage fluctuation score, the current three-phase power balance score, and the current noise score of each distribution branch in the distribution system to obtain the current comprehensive power quality score of each distribution branch.

[0071] In practical applications, the current voltage fluctuation score, the current three-phase power balance score, and the current noise score correspond to different weights, namely the voltage fluctuation weight, the three-phase balance weight, and the harmonic weight. The voltage fluctuation weight, the three-phase balance weight, and the harmonic weight can be automatically adjusted according to the historical data distribution using the entropy weight method, or determined by expert scoring through the AHP (Analytic Hierarchy Process).

[0072] Next, based on the correspondence between the power quality level and the power quality comprehensive score range, determine the power quality level corresponding to the power quality comprehensive score range where the current power quality comprehensive score is located as the current power quality level of each distribution branch. Among them, the power quality levels can include level one, level two, level three, and level four; as the level number increases, the power quality decreases gradually. The higher the current power quality comprehensive score, the higher the corresponding level.

[0073] Finally, take the current power quality level of each distribution branch as the power quality evaluation result. The power quality evaluation result can also include the current voltage fluctuation score, the current three-phase power balance score, and the current noise score of each distribution branch.

[0074] In a possible implementation manner, when evaluating the distribution system according to the power data, temperature data, and harmonic data to obtain the device operation evaluation result of the distribution system, the central processing platform is specifically used for:

[0075] According to the preset fault evaluation criteria, evaluate the power data and temperature data of the distribution system to obtain the current faulty device identifier, the current fault type, and the current fault level in the distribution system, and take the current faulty device identifier, the current fault type, and the current fault level in the distribution system as the device operation evaluation result.

[0076] In practical applications, the fault assessment criteria include the assessment criteria for multiple fault types. Each assessment criterion includes the data types for assessment, the data threshold ranges, and the corresponding fault levels. The fault types may include: transformer short - circuit fault, input - end over - voltage fault, load - end power exceeding standard fault, transformer high - temperature fault, and line high - temperature fault. The data types that need to be assessed for the transformer short - circuit fault are the power data on the primary and secondary sides of the transformer; the data types that need to be assessed for the input - end over - voltage fault are the power data from the high - voltage power supply input to the power distribution system; the data types that need to be assessed for the load - end power exceeding standard fault are the power data from the power distribution system output to the load; the data types that need to be assessed for the transformer high - temperature fault are the power data on the primary and secondary sides of the transformer and the temperature data of the transformer. The data types that need to be assessed for the line high - temperature fault include the temperature data of the transmission line. The fault levels may include level one, level two, level three, and level four; as the level increases, the severity of the fault increases. The faulty device can be determined according to the fault type and the source of the data for assessment.

[0077] In a possible implementation manner, when hierarchically regulating the power distribution system according to the levels in the power quality assessment result and the device operation assessment result, the central processing platform is specifically configured to:

[0078] When the current power quality level of the power distribution branch is higher than the first power quality level threshold and lower than the second power quality level threshold, take the weighted scoring item with the highest proportion in the current power quality comprehensive score corresponding to the current power quality level as the target scoring item; execute the adjustment method corresponding to the score and the scoring type before weighting for the target scoring item.

[0079] When the current power quality level of the power distribution branch is higher than the second power quality level threshold, disconnect the corresponding power distribution branch from the high - voltage power supply and the load.

[0080] In practical applications, the first quality level threshold corresponds to a slight impact on the safety of the power distribution system, but it is the lowest power quality level that can be improved by adjustment. The second quality level threshold is greater than the first quality level threshold. The second quality level threshold corresponds to a serious impact on the safety of the power distribution system and is the lowest power quality level that cannot be improved by adjustment. When the current power quality level of the distribution branch is lower than the first quality level threshold, the central processing platform only stores and forwards the current power quality level. When the current power quality level of the distribution branch is higher than the second quality level threshold, the corresponding distribution branch is directly disconnected, that is, the connection between the distribution branch and the high-voltage power source and the load is disconnected by controlling the disconnection of the high-voltage side switch equipment and the low-voltage side switch equipment on the distribution branch. When the current power quality level of the distribution branch is higher than the first quality level threshold and lower than the second quality level threshold, the current comprehensive power quality score corresponding to the current power quality level is determined, and the weighted score item with the largest weighted score in the current comprehensive power quality score is used as the target score item. The main reason for the reduction of power quality can be further determined according to the target score item. The adjustment method corresponding to the score and score type before the weighting corresponding to the target score item is executed. Among them, the score type is one of the voltage fluctuation score, the three-phase power balance score, and the noise score.

[0081] Specifically, a corresponding relationship between the voltage fluctuation score range and the voltage fluctuation adjustment measure, a corresponding relationship between the three-phase power balance score range and the three-phase adjustment measure, and a corresponding relationship between the noise score range and the noise adjustment measure are preset. When the score type corresponding to the target score item is the voltage fluctuation score, if the voltage fluctuation score exceeds the voltage fluctuation score threshold, the target voltage fluctuation position is determined according to the voltage data corresponding to the voltage fluctuation score in the distribution branch, and a warning indicating that a large voltage fluctuation is detected at the target voltage fluctuation position is sent to the display and control platform, and the transformer tap corresponding to the target voltage fluctuation position is switched. If the voltage fluctuation score does not exceed the voltage fluctuation score threshold, the target voltage fluctuation position is determined according to the voltage data corresponding to the voltage fluctuation score in the distribution branch, and a warning indicating that a small voltage fluctuation is detected at the target voltage fluctuation position is sent to the display and control platform, and the SVG output reactive power is adjusted to compensate for the voltage deviation at the target voltage fluctuation position.

[0082] When the scoring type corresponding to the target scoring item is the three-phase power balance scoring, if the three-phase power balance scoring exceeds the three-phase power balance scoring threshold, determine the target imbalance position according to the data corresponding to the current three-phase power balance scoring, and send a warning indicating that a large-scale three-phase power imbalance is detected at the target imbalance position to the display and control platform, and adjust the load distribution to preferentially cut off the unbalanced load at the target imbalance position. If the current three-phase power balance scoring does not exceed the three-phase power balance scoring threshold, determine the target imbalance position according to the data corresponding to the current three-phase power balance scoring, and send a warning indicating that a small-scale three-phase power imbalance is detected at the target imbalance position to the display and control platform, and put into the three-phase balance device.

[0083] When the scoring type corresponding to the target scoring item is the noise scoring, if the noise scoring exceeds the noise scoring threshold, determine the target noise position according to the noise data corresponding to the current noise scoring, and send a warning indicating that high-frequency noise is detected at the target noise position to the display and control platform, so that the operation and maintenance personnel can go to the target noise position to put on magnetic rings on the transmission line according to the warning to solve the noise problem. If the noise scoring does not exceed the noise scoring threshold, determine the target noise position according to the noise data corresponding to the current noise scoring, and send a prompt indicating that high-frequency noise may exist at the target noise position to the display and control platform, so that the operation and maintenance personnel can continuously pay attention to the target noise position according to the prompt.

[0084] In a possible implementation manner, when hierarchically regulating the power distribution system according to the levels in the power quality assessment result and the device operation assessment result, the central processing platform is specifically used for:

[0085] If the current fault type belongs to an adjustable fault, when the current fault level is lower than the first fault level threshold, execute the adjustment measures corresponding to the current fault type and the current fault level; when the current fault level is not lower than the first fault level threshold, disconnect the connection between the faulty device and the high-voltage power supply and / or the load;

[0086] If the current fault type belongs to a non-adjustable fault, when the current fault level is higher than the first fault level threshold, disconnect the connection between the faulty device and the high-voltage power supply and / or the load.

[0087] In practical applications, the first fault level threshold corresponds to the lowest fault level where the fault seriously affects the operation of the power distribution system and cannot be eliminated by adjustment. Adjustable faults include input overvoltage faults and load-side power over-limit faults. When the current fault type is an input overvoltage fault among the adjustable faults and the current fault level is lower than the first fault level threshold, the on-load tap-changer at the current fault location is controlled to adjust the corresponding tap to achieve appropriate voltage stabilization. It is worth noting that if the fault level does not change after the preset time, at this time, the central processing platform will send a warning of "overvoltage, request to adjust the outlet voltage of the upstream substation" to the display and control platform. When the current fault level is not lower than the first fault level threshold, the central processing platform sends an instruction to the high-voltage side switchgear to disconnect the connection between the transformer and the high-voltage power supply to complete fault isolation. At this time, the central processing platform will send a serious warning of "severe overvoltage, overvoltage tripping protection has been automatically executed" to the display and control platform. When the current fault type is a load-side power over-limit fault among the adjustable faults and the current fault level is lower than the first fault level threshold, a warning of corresponding load-side power overload is sent to the display and control platform and hierarchical unloading is started, that is, the central processing platform sends an instruction to the low-voltage side switchgear to disconnect the secondary load connected to the load side with excessive power. The secondary load can be air conditioners, lighting, etc. in non-critical areas. When the current fault level is not lower than the first fault level threshold, all loads connected to the load side with excessive power are disconnected.

[0088] In practical applications, non-adjustable faults include transformer short-circuit faults, transformer high-temperature faults, and line high-temperature faults. When the current fault type is a transformer short-circuit fault among non-adjustable faults, and the current fault level is lower than the first fault level threshold, the central processing platform will send a warning of "There is a short-circuit risk in the transformer" to the display and control platform. When the current fault level is higher than the first fault level threshold, if the transformer has a primary-side short circuit, the central processing platform will disconnect the connection between the transformer and the high-voltage power supply by controlling the high-voltage side switchgear; if the transformer has a secondary-side short circuit, the central processing platform will disconnect the connection between the transformer and the load by controlling the low-voltage side switchgear, and the central processing platform will send a warning of "Transformer short-circuit, tripped" to the display and control platform. When the current fault type is a transformer high-temperature fault among non-adjustable faults, and the current fault level is lower than the first fault level threshold, the central processing platform will send a warning of "Abnormal transformer temperature, please check the cooling system" to the display and control platform. When the current fault level is higher than the first fault level threshold, the central processing platform will disconnect the connection between the transformer and the high-voltage power supply and the load by controlling the high-voltage side switchgear to achieve emergency tripping, and send a serious warning of "Transformer temperature seriously exceeds the limit, emergency tripping has occurred, please check the cooling system" to the display and control platform. When the current fault type is a line high-temperature fault among non-adjustable faults, and the current fault level is lower than the first fault level threshold, the central processing platform will send a warning of "Abnormal transmission line temperature, please conduct a line inspection" to the display and control platform. When the current fault level is higher than the first fault level threshold, the central processing platform will disconnect the connection between the transmission line and the high-voltage power supply, load, or transformer by controlling the high-voltage side switchgear or low-voltage side switchgear to achieve emergency tripping, and send a serious warning of "Transmission line temperature seriously exceeds the limit, emergency tripping has occurred, please conduct a line inspection" to the display and control platform.

[0089] In a possible implementation, referring to Figure 2 As shown, the data acquisition module includes: an input power acquisition module 111, a transformer power acquisition module 112, a load-end power acquisition module 113, a line temperature acquisition module 114, a transformer temperature acquisition module 115, and a harmonic acquisition module 116; the input power acquisition module 111, the transformer power acquisition module 112, the load-end power acquisition module 113, the line temperature acquisition module 114, the transformer temperature acquisition module 115, and the harmonic acquisition module 116 are respectively connected to the central processing platform 120;

[0090] The input power acquisition module 111 is arranged on the transmission line between the high-voltage side switchgear 102 and the high-voltage power supply; the input power acquisition module 111 is used to collect the power data input from the high-voltage power supply to the power distribution system;

[0091] The load - end power acquisition module 113 is set on the transmission line between the low - voltage side switchgear 103 and the load; the load - end power acquisition module 113 is used to collect the power data output from the power distribution system to the load;

[0092] The transformer power acquisition modules 112 are respectively set on the transmission lines between the transformer 101 and the high - voltage side switchgear 102 and the low - voltage side switchgear 103; the transformer power acquisition modules 112 are used to collect the power data on the primary and secondary sides of the transformer 101;

[0093] The line temperature acquisition modules 114 are respectively set on each transmission line, and the line temperature acquisition modules 114 are used to collect the temperature data of the transmission lines;

[0094] The transformer temperature acquisition modules 115 are set on each transformer 101; the transformer temperature acquisition modules 115 are used to collect the temperature data of the transformer 101;

[0095] The harmonic acquisition modules 116 are set on the transmission lines between the low - voltage side switchgear 103 and each load; the harmonic acquisition modules 116 are used to collect the harmonic data input by the load.

[0096] In Figure 2 In the power distribution branch shown, the input - end power acquisition module 111 is installed on the transmission line between the high - voltage side switchgear 102 (such as a 10 kV incoming line cabinet) and the superior high - voltage power source (power grid or generator set). The input - end power acquisition module 111 can include a voltage sensor and a current transformer. The input - end power acquisition module is used to collect the high - voltage side input voltage, current, and power data in real - time and transmit them to the central processing platform 120 through optical fiber for evaluating the power grid power supply stability. The transformer power acquisition modules 112 are respectively set on the transmission line between the high - voltage side switchgear 102 and the high - voltage winding of the transformer 101 and the line transmission between the low - voltage winding of the transformer 101 and the low - voltage side switchgear 103. The transformer power acquisition modules 112 can include a voltage sensor and a current transformer. The load - end power acquisition module 113 is installed on the transmission line between the low - voltage side switchgear 103 and each load branch. The load - end power acquisition module 113 can include a voltage sensor and a current transformer. The line temperature acquisition module 114 is deployed at the joints of the transmission lines. The line temperature acquisition module 114 includes a wireless temperature sensor. The line temperature acquisition module 114 can construct a line temperature distribution thermal map, locate local over - heating points, and determine the corresponding temperature. The transformer temperature acquisition module 115 is deployed at the hot spots of the transformer 101 windings. The transformer temperature acquisition module 115 includes a wireless temperature sensor. The harmonic acquisition module 116 is deployed on the transmission line between the low - voltage side switchgear 103 and the load (such as a frequency converter, UPS). The harmonic acquisition module 116 includes a harmonic sensor.

[0097] In a possible implementation, refer to Figure 3 As shown, the intelligent management and control system of the power distribution system further includes: a display and control platform 130; the display and control platform 130 is communicatively connected to the central processing platform 120;

[0098] The display and control platform 130 is configured to receive and display the power quality assessment result and the device operation assessment result sent by the central processing platform 120; and determine the current aging degree score of each device in the power distribution system 100 according to the device operation assessment result within a preset time; when there is a current aging degree score greater than the preset score threshold among the current aging degree scores of each device, generate an aging replacement prompt based on the current aging degree score greater than the preset score threshold and the corresponding device identifier.

[0099] In Figure 3 In the intelligent management and control system of the power distribution system shown, the display and control platform 130 may adopt a preset device aging assessment model to determine the current aging degree score of each device according to the device operation assessment result within a preset time. According to the device operation assessment result within a preset time, the number of faults of each device in the power distribution system 100 within the preset time and the number of high-temperature faults within the preset time can be determined, and in combination with the service life, operation duration, temperature overrun threshold, and fault number threshold recorded in the display and control platform 130 during this period, the current aging degree score is obtained through the following device aging assessment model.

[0100]

[0101] Wherein, s is the current aging degree score, x is the number of high-temperature faults of the device within the preset time, y is the number of faults of the device within the preset time, T is the service life, t is the operation duration, X is the temperature overrun number threshold, and Y is the fault number threshold. w1, w2, and w3 are the weights corresponding to the respective parameters in the formula, and the weights are different for different device types. When there is a current aging degree score greater than the preset score threshold among the current aging degree scores of each device, it corresponds to a higher aging degree of the device, and the display and control platform 130 generates an aging replacement prompt based on the current aging degree score greater than the preset score threshold and the corresponding device identifier.

[0102] In this way, the traditional power distribution system relies on manual inspections or fixed-period equipment replacements, which has the drawbacks of over-maintenance or lagged maintenance. The display and control platform integrates the device operation evaluation results within a preset time period, constructs an aging scoring model, and converts the degree of equipment aging into a quantifiable indicator. This scoring mechanism based on multi-dimensional data is more scientific than the traditional single-parameter judgment, realizing the transformation of equipment aging assessment from empirical judgment to quantitative analysis and improving the accuracy of equipment remaining life prediction. When the aging score exceeds the preset threshold, the system automatically generates a replacement prompt containing specific device identification and exceeded parameters, and associates the operation history data of the device. Maintenance personnel can plan spare parts procurement and power outage windows in advance based on this to avoid power outage losses caused by sudden failures.

[0103] It is worth noting that each operation of the low-voltage side switchgear and high-voltage side switchgear in the power distribution system by the central processing platform can be recorded in the form of a log and sent back to the display and control platform, which can be used as a reference for maintenance personnel to troubleshoot faults.

[0104] In a possible implementation, referring to Figure 4 as shown, the intelligent management and control system of the power distribution system further includes: a storage module 140; the storage module 140 is connected to the central processing platform 120;

[0105] The central processing platform 120 is used to obtain the version upgrade file sent by the central processing platform 120 and store the version upgrade file in the storage module 140; after receiving the update instruction sent by the display and control platform 130, determine the update version identifier in the update instruction, obtain the version upgrade file corresponding to the update version identifier from the storage module 140 as the target upgrade file, and perform the upgrade operation of the intelligent management and control system based on the target upgrade file.

[0106] Referring to Figure 5 as shown, the central processing platform is composed of an FPGA and an SOC mounted on it. The interface between the SOC and the FPGA is PCIE or USB. Various sensors can communicate with the central processing platform through the CAN bus or RS485 bus. The central processing platform is connected to the controlled device through the GPIO interface and controls the controlled device through GPIO signals. The central processing platform is connected to the display and control platform through an Ethernet connection via a WIFI chip mounted on the SOC for wireless network communication.

[0107] In Figure 4In the intelligent management and control system of the power distribution system shown, when the power distribution system 100 is upgraded and transformed, for example, the load range increases, the maximum tolerable voltage and current increase, the types and quantities of sensors increase, and the software of the corresponding central processing platform 120 also needs to be upgraded and iterated. When software updates are required, the display and control platform 130 sends a binary file in.bin format of the new version software to the central processing platform 120 via Ethernet. After the central processing platform 120 receives the file and passes the verification, it is stored in a storage module 140 dedicated to storing the new version. The storage module 140 can be a non-volatile memory such as Flash or MRAM, and this storage module 140 can be referred to as the software update area. When software updates need to be executed, the display and control platform 130 sends an update execution instruction to the central processing platform 120. After receiving the update instruction sent by the display and control, the CPU of the central processing platform 120 writes a flag bit to start from the software update area to a specific address of the FPGA of the central processing platform 120 after receiving the instruction. Then, after the CPU of the central processing platform 120 performs a reset operation, the Bootloader executes the reset operation. After the execution program determines the start flag bit, it determines the update version identifier in the update instruction, obtains the version upgrade file corresponding to the update version identifier from the storage module 140 as the target upgrade file, and transports the target upgrade file from the software update area to the application program in the memory. After the reset is successful, the central processing platform 120 completes the version update.

[0108] Based on the above embodiments, the embodiments of the present application provide an intelligent management and control method for a power distribution system. Refer to Figure 6 As shown, the general process of the intelligent management and control method for the power distribution system provided by the embodiments of the present application includes:

[0109] Step 601: Obtain the power data, temperature data, and harmonic data of the power distribution system.

[0110] Step 602: Evaluate the power distribution system according to the power data, temperature data, and harmonic data of the power distribution system to obtain the operation evaluation result of the power distribution system; wherein, the operation evaluation result includes the power quality evaluation result and the device operation evaluation result.

[0111] Step 603: Perform hierarchical regulation and control on the power distribution system according to the levels in the power quality evaluation result and the device operation evaluation result.

[0112] In a possible implementation manner, evaluating the power distribution system according to the power data, temperature data, and harmonic data of the power distribution system to obtain the operation evaluation result of the power distribution system includes:

[0113] First, determine the input imbalance degree of each transformer and the voltage variation data of each load end in the power distribution system according to the power data of the power distribution system.

[0114] Then, according to the preset power evaluation criteria, evaluate the input imbalance of each transformer, the voltage variation data and harmonic data of each load terminal, and obtain the current voltage fluctuation score, the current three-phase power balance score and the current noise score of each distribution branch in the distribution system.

[0115] Next, perform a weighted sum of the current voltage fluctuation score, the current three-phase power balance score and the current noise score of each distribution branch in the distribution system to obtain the current comprehensive power quality score of each distribution branch.

[0116] Next, based on the correspondence between the power quality level and the power quality comprehensive score range, determine the power quality level corresponding to the power quality comprehensive score range where the current power quality comprehensive score is located as the current power quality level of each distribution branch.

[0117] Finally, take the current power quality level of each distribution branch as the power quality evaluation result.

[0118] In a possible implementation manner, evaluate the distribution system according to the power data, temperature data and harmonic data of the distribution system, and obtain the operation evaluation result of the distribution system, including:

[0119] According to the preset fault evaluation criteria, evaluate the power data and temperature data of the distribution system, obtain the current fault device identifier, the current fault type and the current fault level in the distribution system, and take the current fault device identifier, the current fault type and the current fault level in the distribution system as the device operation evaluation result.

[0120] In a possible implementation manner, perform hierarchical regulation on the distribution system according to the levels in the power quality evaluation result and the device operation evaluation result, including:

[0121] When the current power quality level of the distribution branch is higher than the first quality level threshold and lower than the second quality level threshold, take the weighted score item with the highest proportion in the current comprehensive power quality score corresponding to the current power quality level as the target score item; execute the adjustment method corresponding to the score and score type before the weighting corresponding to the target score item;

[0122] When the current power quality level of the distribution branch is higher than the second quality level threshold, disconnect the corresponding distribution branch from the high-voltage power source and the load.

[0123] In a possible implementation manner, perform hierarchical regulation on the distribution system according to the levels in the power quality evaluation result and the device operation evaluation result, including:

[0124] When the current fault type belongs to an adjustable fault, when the current fault level is lower than the first fault level threshold, perform adjustment measures corresponding to the current fault type and the current fault level; when the current fault level is not lower than the first fault level threshold, disconnect the faulty device from the high-voltage power supply and / or the load;

[0125] When the current fault type belongs to a non-adjustable fault, when the current fault level is higher than the first fault level threshold, disconnect the faulty device from the high-voltage power supply and / or the load.

[0126] In a possible implementation manner, the intelligent management and control method of the power distribution system further includes:

[0127] Send the power quality evaluation result and the device operation evaluation result to the display and control platform, so that the display and control platform receives and displays the power quality evaluation result and the device operation evaluation result, and determines the current aging degree score of each device in the power distribution system according to the power quality evaluation result and the device operation evaluation result within a preset time; when there is a current aging degree score greater than the preset score threshold in the current aging degree scores of each device, generate an aging replacement prompt based on the current aging degree score greater than the preset score threshold and the corresponding device identifier.

[0128] In a possible implementation manner, the intelligent management and control method of the power distribution system further includes:

[0129] Obtain the version upgrade file sent by the display and control platform, and store the version upgrade file in the storage module; after receiving the update instruction sent by the display and control platform, determine the update version identifier in the update instruction, obtain the version upgrade file corresponding to the update version identifier from the storage module as the target upgrade file, and perform the upgrade operation of the intelligent management and control system based on the target upgrade file.

[0130] It should be noted that although several units or subunits of the device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to the embodiments of the present application, the features and functions of the two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided and embodied by multiple units.

[0131] In addition, although the operations of the method of the present application are described in a specific order in the drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution.

[0132] Although the preferred embodiments of the present application have been described, additional changes and modifications can be made to these embodiments by those skilled in the art once they learn of the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present application.

[0133] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and modifications.

Claims

1. An intelligent management and control system for a power distribution system, characterized in that, The distribution system includes multiple distribution branches respectively connected to a high-voltage power source. Each distribution branch includes a transformer, high-voltage side switchgear, and low-voltage side switchgear. The transformer is connected to the high-voltage power source via a transmission line and the high-voltage side switchgear, and the transformer is connected to each load via a transmission line and the low-voltage side switchgear. The intelligent management and control system of the distribution system includes: a data acquisition module and a central processing platform. The data acquisition module is communicatively connected to the central processing platform. The data acquisition module is used to collect power data, temperature data, and harmonic data of the distribution system. The central processing platform is used to evaluate the distribution system based on the power data, the temperature data, and the harmonic data to obtain an operation evaluation result of the distribution system. Among them, the operation evaluation result includes a power quality evaluation result and a device operation evaluation result. The distribution system is hierarchically regulated according to the levels in the power quality evaluation result and the device operation evaluation result.

2. The intelligent management and control system of the power distribution system according to claim 1, characterized in that The central processing platform is specifically used for: Determining the input unbalance degree of each transformer and the voltage variation data of each load end in the distribution system according to the power data of the distribution system. Evaluating the input unbalance degree of each transformer, the voltage variation data of each load end, and the harmonic data according to a preset power evaluation standard to obtain the current voltage fluctuation score, the current three-phase power balance score, and the current noise score of each distribution branch in the distribution system. Performing a weighted sum of the current voltage fluctuation score, the current three-phase power balance score, and the current noise score of each distribution branch in the distribution system to obtain the current power quality comprehensive score of each distribution branch. Based on the correspondence between the power quality level and the power quality comprehensive score interval, determining the power quality level corresponding to the power quality comprehensive score interval where the current power quality comprehensive score is located as the current power quality level of each distribution branch. Taking the current power quality level of each distribution branch as the power quality evaluation result.

3. The intelligent management and control system of the power distribution system according to claim 1, characterized in that, The central processing platform is specifically used for: Evaluating the power data and temperature data of the distribution system according to a preset fault evaluation standard to obtain the current fault device identifier, the current fault type, and the current fault level in the distribution system, and taking the current fault device identifier, the current fault type, and the current fault level in the distribution system as the device operation evaluation result.

4. The intelligent management and control system of the power distribution system according to claim 2, wherein The central processing platform is specifically used for: When the current power quality level of the distribution branch is higher than the first quality level threshold and lower than the second quality level threshold, taking the weighted scoring item with the highest proportion in the current power quality comprehensive score corresponding to the current power quality level as the target scoring item; executing the adjustment method corresponding to the score and the scoring type before the weighting corresponding to the target scoring item. When the current power quality level of the distribution branch is higher than the second quality level threshold, disconnecting the corresponding distribution branch from the high-voltage power source and the load.

5. The intelligent management and control system of the power distribution system according to claim 3, characterized in that, The central processing platform is specifically used for: When the current fault type belongs to an adjustable fault, when the current fault level is lower than the first fault level threshold, perform adjustment measures corresponding to the current fault type and the current fault level; When the current fault level is not lower than the first fault level threshold, disconnect the faulty device from the high-voltage power supply and / or the load; When the current fault type belongs to a non-adjustable fault, when the current fault level is higher than the first fault level threshold, disconnect the faulty device from the high-voltage power supply and / or the load.

6. The intelligent management and control system of the power distribution system according to any one of claims 1-5, characterized in that, The data acquisition module includes: an input power acquisition module, a transformer power acquisition module, a load-side power acquisition module, a line temperature acquisition module, a transformer temperature acquisition module, and a harmonic acquisition module; the input power acquisition module, the transformer power acquisition module, the load-side power acquisition module, the line temperature acquisition module, the transformer temperature acquisition module, and the harmonic acquisition module are respectively connected to the central processing platform; The input power acquisition module is arranged on the transmission line between the high-voltage side switchgear and the high-voltage power supply; the input power acquisition module is used to acquire the power data input from the high-voltage power supply to the power distribution system; The load-side power acquisition module is arranged on the transmission line between the low-voltage side switchgear and the load; the load-side power acquisition module is used to acquire the power data output from the power distribution system to the load; The transformer power acquisition module is respectively arranged on the transmission lines between the transformer and the high-voltage side switchgear and the low-voltage side switchgear; the transformer power acquisition module is used to acquire the power data on the primary side and the secondary side of the transformer; The line temperature acquisition module is respectively arranged on each transmission line, and the line temperature acquisition module is used to acquire the temperature data of the transmission line; The transformer temperature acquisition module is arranged on each transformer; the transformer temperature acquisition module is used to acquire the temperature data of the transformer; The harmonic acquisition module is arranged on the transmission line between the low-voltage side switchgear and each load; the harmonic acquisition module is used to acquire the harmonic data input by the load.

7. The intelligent management and control system of the power distribution system according to claim 1, characterized in that, It further includes: A display and control platform; the display and control platform is communicatively connected to the central processing platform; The display and control platform is used to receive and display the power quality assessment result and the device operation assessment result sent by the central processing platform; and determine the current aging degree score of each device in the power distribution system according to the device operation assessment result within a preset time; when there is a current aging degree score greater than the preset score threshold among the current aging degree scores of each device, generate an aging replacement prompt based on the current aging degree score greater than the preset score threshold and the corresponding device identifier.

8. The intelligent management and control system of the power distribution system according to claim 7, characterized in that, It further includes: A storage module; The storage module is connected to the central processing platform; The central processing platform is used to obtain the version upgrade file sent by the display and control platform and store the version upgrade file in the storage module; after receiving the update instruction sent by the display and control platform, determine the update version identifier in the update instruction, obtain the version upgrade file corresponding to the update version identifier from the storage module as the target upgrade file, and perform the upgrade operation of the intelligent management and control system based on the target upgrade file.

9. An intelligent management and control method for a power distribution system, characterized in that, Applied to the intelligent management and control system of the power distribution system as described in any one of claims 1-8, it includes: Obtain the power data, temperature data, and harmonic data of the power distribution system; Evaluate the power distribution system according to the power data, temperature data, and harmonic data of the power distribution system to obtain the operation evaluation result of the power distribution system; wherein, the operation evaluation result includes the power quality evaluation result and the device operation evaluation result; Perform hierarchical control on the power distribution system according to the levels in the power quality evaluation result and the device operation evaluation result.

10. The intelligent management and control method of the power distribution system according to claim 9, characterized in that, Evaluating the power distribution system according to the power data, temperature data, and harmonic data of the power distribution system to obtain the operation evaluation result of the power distribution system includes: Determine the input imbalance degree of each transformer and the voltage variation data of each load end in the power distribution system according to the power data of the power distribution system; Evaluate the input imbalance degree of each transformer, the voltage variation data of each load end, and the harmonic data according to the preset power evaluation standard to obtain the current voltage fluctuation score, the current three-phase power balance score, and the current noise score of each distribution branch in the power distribution system; Perform weighted summation on the current voltage fluctuation score, the current three-phase power balance score, and the current noise score of each distribution branch in the power distribution system to obtain the current comprehensive power quality score of each distribution branch; Based on the correspondence between the power quality level and the power quality comprehensive score interval, determine the power quality level corresponding to the power quality comprehensive score interval where the current comprehensive power quality score is located as the current power quality level of each distribution branch; Use the current power quality level of each distribution branch as the power quality evaluation result.

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