Micro-application testing method for typical service scene of low-voltage intelligent internet-of-things station area

Abstract

The invention discloses a micro-application test method for a typical service scene of a low-voltage smart Internet of Things area. The method specifically comprises the following steps: S1, a fusion terminal virtually tests an edge side micro-application according to the type of a typical application scene test; s2, the fusion terminal sends a service message to the data center micro-application through the test edge micro-application, and tests the alarm function of the terminal based on response data of the data center micro-application to obtain response test data; and S3, analyzing the response test data, if the response test data is displayed normally, collecting corresponding data, verifying the response data, and if the response test data is displayed abnormally, reporting abnormal data to the master station, and determining a test result. According to the micro-application test method for the typical service scene of the low-voltage intelligent Internet of Things court, provided by the invention, various functions of the edge-side micro-application deployed by the electric power Internet of Things terminal can be verified, and whether the micro-application function meets the requirement or not is detected.

Description

Technical Field

[0001] The present invention belongs to the technical field of metering data collection, and specifically relates to a micro-application testing method for typical business scenarios in low-voltage smart IoT areas. Background Art

[0002] As the "last mile" of power supply services, low-voltage distribution networks are directly facing users, with characteristics such as fast-changing management requirements, large-scale equipment under management, and high service requirements. The current prominent problems mainly include low-voltage fault processing and judgment, and distributed power access control. To solve the above problems, various new edge devices have emerged, but their functions still need to be verified. Therefore, it is urgent to carry out adaptability testing and demonstration of new equipment and new technologies to improve power supply reliability and resource control capabilities.

[0003] The intelligent fusion terminal is an edge device of the "cloud-pipe-edge" architecture of the smart IoT system. It has information collection, IoT agent and edge computing functions. It is installed on the power supply side of the distribution transformer in the distribution station area to realize online management and remote operation and maintenance of various edge IoT agents and intelligent terminals. The working performance of the fusion terminal plays a vital role in the normal operation of the distribution network.

[0004] Based on the overall technical idea of ​​the smart IoT system in the distribution station area, we should give full play to the advantages of the IoT technical architecture of the substation integrated terminal, use cloud-edge collaborative computing technology, carry out the design and application of edge-side micro-applications in the substation integrated terminal, implement the practice of various typical application scenarios in the substation, and further improve the refined operation and maintenance level of the low-voltage distribution network.

[0005] The main technical difficulties faced by the current test include the following aspects:

[0006] ①Incomplete detection of converged terminals and difficult testing methods

[0007] In the prior art, the detection devices of the fusion terminal are mostly for the collection of conventional transformer information, and do not include various downstream devices, so the detection is not comprehensive enough. With the deployment and installation of the fusion terminal, various manufacturers have successively developed their own advanced applications or transplanted previous applications on the fusion terminal, which will cause the fusion terminal to crash after installation. The fusion terminal in the substation area is prone to problems such as cumbersome test steps, long time consumption, easy errors in manual methods, and inaccurate manual calculation of time.

[0008] ②Typical application scenario micro-applications do not have specific verification solutions

[0009] Currently, most of the related experiments and research in low-voltage distribution networks are carried out by means of real environment construction or software simulation, and more of them are about the physical environment construction of the low-voltage substation itself. Based on the typical application scenarios of the substation intelligent fusion terminal, there is currently no effective universal verification method, so there is an urgent need to carry out corresponding technical research.

[0010] ③Micro-applications lack a specific testing environment

[0011] At present, the edge-side micro-applications deployed in power IoT terminals are about to be developed and deployed on a large scale, but there is no corresponding detection method to verify the various functions of these micro-applications. It is necessary to build a relevant detection environment and test each item according to the functional test cases to check whether the micro-applications meet the functions required by users. Summary of the invention

[0012] The purpose of the present invention is to provide a micro-application testing method for typical business scenarios in low-voltage smart IoT substations, which can verify the various functions of edge-side micro-applications deployed by power IoT terminals and detect whether the micro-application functions meet the requirements.

[0013] The technical solution adopted by the present invention is a micro-application testing method for typical business scenarios in low-voltage smart IoT areas, which is completed through a low-voltage smart IoT area real distribution network simulation test platform. The specific method is as follows:

[0014] S1. Use the fusion terminal in the low-voltage smart IoT area real distribution network simulation test platform to virtually test edge-side micro-applications according to the type of typical application scenario test;

[0015] S2. The fusion terminal then sends a service message to the data center micro-application through the test edge micro-application, and tests the alarm function of the terminal based on the response data of the data center micro-application to obtain response test data;

[0016] S3. Analyze the response test data. If the response test data shows normal, collect the corresponding data and verify the response data. If the response test data shows abnormal, report the abnormal data to the main station to determine the test result.

[0017] The present invention is also characterized in that:

[0018] The types of typical application scenario tests in S1 include: distribution network operation status perception, distribution business integration improvement, quality service lean management, source network load storage comprehensive optimization, and enterprise platform ecosystem co-construction;

[0019] Distribution network operation status perception includes: distribution transformer operation status monitoring, power supply reliability analysis, low-voltage topology identification, and reactive power compensation monitoring; distribution business integration improvement includes: substation line loss analysis, substation load forecasting, substation open capacity forecasting, and distribution local interaction; high-quality service lean management includes: fault location analysis and power quality analysis; comprehensive optimization of source, grid, load and storage includes: distributed power supply consumption and orderly charging of electric vehicles.

[0020] In S1, the converged terminal virtually tests the edge micro-application according to the type of typical application scenario test. The specific method is as follows:

[0021] When testing the distribution transformer operation status monitoring scenario, the fusion terminal collects basic electrical quantity information of the exchange micro-application, including basic telemetry data such as three-phase current, three-phase voltage, power, and imbalance, and saves the information to the data center. The data update cycle must meet business needs; the electrical quantity information is obtained from the data center, and the power quality micro-application performs statistical analysis on it, and the statistical analysis results are saved to the data center to achieve real-time perception of power outage, power restoration, imbalance, load imbalance, heavy, overload, overvoltage, overcurrent and other states in the distribution transformer area;

[0022] When conducting power supply reliability analysis scenario testing, the fusion terminal collects the power outage occurrence / recovery alarm and time data on the low-voltage side of the main transformer, and saves the information to the data center. The power quality analysis micro-application analyzes the power outage data of the low-voltage area, including the power outage duration, number of power outages, and power supply reliability rate of the low-voltage area, and saves the analysis results to the data center;

[0023] When conducting low-voltage topology identification scenario testing, the fusion terminal uses the local communication module or big data analysis method to realize the transformer, branch, meter box, and physical topology of the substation area, automatically judge whether the smart electric energy meter crosses the substation area and the phase it is in, and upload the substation area physical topology, phase information, and cross-substation area information to the main station through the terminal;

[0024] When testing the reactive power compensation monitoring scenario, the intelligent capacitor / SVG device collects information to monitor the reactive power compensation adjustment device's adjustment status, power factor, input capacity and other information, and uploads the information to the master station through the fusion terminal;

[0025] When conducting a line loss analysis scenario test in a substation, the substation segment and phase line losses are calculated through the substation intelligent fusion terminal, substation master meter, LTU, household smart meter and other equipment, and the abnormal line loss is sent as an alarm event and uploaded to the main station through the fusion terminal;

[0026] When conducting a scenario test on the available capacity prediction of a substation, the distribution transformer operation data is collected through the substation intelligent fusion terminal, and the available capacity of the substation is calculated based on the rated capacity of the distribution transformer, and the data is sent to the distribution master station;

[0027] When conducting a load forecasting scenario test for a substation, the fusion terminal collects the operating data of distribution transformers and box transformers, including basic telemetry data such as three-phase current, three-phase voltage, power, electric energy, and ambient temperature, and saves the historical data of distribution transformer load and power consumption data to the data center;

[0028] When testing the local interactive scenario of marketing and distribution, choose to obtain the electric energy meter data from the concentrator or the terminal from the data center, depending on whether the station area uses a concentrator, monitor the power consumption of users in the station area, send the power outage events of each electric energy meter as alarm events, and upload them to the main station through the terminal;

[0029] When testing the fault location analysis scenario, collect the power outage alarm / recovery, voltage loss alarm / recovery, and overcurrent alarm / recovery alarm events sent to the fusion terminal data center from the fusion terminal body and the equipment, analyze them in combination with the substation network topology, locate the fault point, generate equipment fault event information and report it to the master station. The master station receives the equipment fault event information and displays the data in combination with the substation topology to achieve rapid location and accurate repair of substation faults;

[0030] When conducting power quality analysis scenario testing, the real-time data volume of terminal AC sampling is integrated, and the power quality analysis of the substation is performed, including the three-phase current imbalance, three-phase voltage imbalance, heavy load, overload, voltage and current distortion rate, power outage and restoration, low voltage, overvoltage, phase failure, etc. in the substation, and the substation fault event information is generated and reported to the main station;

[0031] When conducting distributed power consumption scenario testing, according to the specific situation, information can be obtained from the photovoltaic inverter, or a grid-connected switch can be installed to obtain remote measurements such as voltage, current, power, and power factor of the photovoltaic equipment, daily and monthly power generation and other electric energy information, 21st harmonics, voltage qualification rate, three-phase imbalance and other power quality information, photovoltaic grid-connected status and other remote signal state information from the grid-connected switch, and the data information is sent to the data center through the fusion terminal;

[0032] When conducting an orderly charging scenario test for electric vehicles, the intelligent fusion terminal in the area communicates directly with the charging pile, or communicates through the charging pile monitoring terminal, obtains the manufacturer, model, rated power, location and other ledger data of the charging pile and sends them to the data center, obtains abnormal events such as abnormal charging power of the charging pile and abnormal temperature of the charger and sends them to the main station.

[0033] The alarm functions of the terminal in S2 include: power outage and power restoration in the distribution transformer area, voltage and current collection errors, three-phase imbalance, heavy overload, voltage and current distortion rate, power outage and power restoration, low voltage, overvoltage, overcurrent, phase failure, and abnormal line loss.

[0034] A low-voltage smart IoT substation real-type distribution network simulation test platform includes a low-voltage substation simulation structure, which is connected to a substation fusion terminal by wireless connection, and is also connected to a low-voltage fault simulation device and a low-voltage intelligent device through wiring terminals in the line, and the low-voltage fault simulation device and the low-voltage intelligent device are also connected to the low-voltage substation simulation structure by wireless connection, and the low-voltage intelligent device is also connected to the low-voltage fault simulation device and the substation fusion terminal by wireless connection;

[0035] A configuration table formed by the test platform point table is preset in the fusion terminal. The fusion terminal sends control instructions to the micro-application under test through HPLC communication. The micro-application determines the target source code field corresponding to the target instruction encoding according to the mapping relationship of the device point table, and switches to different test scenarios online.

[0036] The low-voltage area simulation structure includes four levels: distribution transformer side, low-voltage side, user side and line side; the distribution transformer side is connected to the low-voltage side through the low-voltage bus, the low-voltage side is connected to the line side through the low-voltage bus, and the line side is connected to the user side through the low-voltage bus;

[0037] The substation fusion terminal is connected to the distribution transformer side through RS485 or micro-power wireless communication, the substation fusion terminal is connected to the low voltage side through RS485, remote signaling or micro-power wireless communication, the substation fusion terminal is connected to the line side through micro-power wireless or HPLC communication, and the substation fusion terminal is connected to the user side through HPLC communication or by adding a communication conversion unit.

[0038] The distribution transformer side is used to shunt the current on the low-voltage side of the distribution transformer through the low-voltage bus, and to collect relevant data of the power grid through various control devices and control related equipment; the line side is used to transmit the current shunted through the low-voltage bus through the branch circuit, and simulate the impedance, measurement, and protection in the branch circuit, and sense faults in the branch circuit; the user side is used to simulate the load, fault, and distributed power supply at the end of the branch circuit.

[0039] The equipment on the distribution transformer side is connected to the fusion terminal through RS485 or micro-power wireless communication; the equipment on the low voltage side is connected to the fusion terminal through RS485, remote signal or micro-power wireless communication; the equipment on the line side is connected to the substation terminal through micro-power wireless or HPLC communication; the equipment on the user side directly collects data through HPLC or adds a communication conversion unit to achieve effective monitoring of user-side perception data.

[0040] The beneficial effects of the present invention are:

[0041] (1) The present invention uses a testing method that combines real-type testing and digital simulation to perform functional system testing of many different types of edge devices in low-voltage smart IoT substations and functional standardization verification and inspection of micro-applications, which helps to improve the level of refined operation and maintenance of low-voltage distribution networks.

[0042] (2) The present invention tests the standardization of existing power Internet of Things applications. Through the power Internet of Things simulation verification environment, with terminals, networks, applications, and data as key elements, the present invention improves the compliance of the ubiquitous power Internet of Things with the standards, thus filling the gap in the testing field of the ubiquitous power Internet of Things for key information infrastructure in the power industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural block diagram of a typical fault simulation test platform for a real distribution network in a low-voltage area of ​​the present invention;

[0044] Figure 2 It is a flow chart of a micro-application testing method for a typical business scenario in a low-voltage smart IoT area provided by the present invention;

[0045] Figure 3 It is a system architecture diagram for implementing a test provided by the present invention;

[0046] Figure 4 This is a diagram of the integrated terminal micro-application testing system provided by the present invention;

[0047] Figure 5 It is a line structure diagram of the substation in the real distribution network simulation test platform provided by the present invention.

[0048] In the figure, 1. the first substation total meter, 2. the fusion terminal, 3. the first multi-function meter, 4. the first phase-changing switch repeater, 5. the first reactive power compensation device, 6. the low-voltage intelligent leakage protection switch, 7. the first low-voltage intelligent switch, 8. the second low-voltage intelligent switch, 9. the first intelligent phase-changing switch, 10. the first intelligent micro-break switch, 11. the first single-phase meter, 12. the first single-phase simulated RLC load, 13. the second intelligent phase-changing switch, 14. the second intelligent micro-break switch, 15. the second single-phase meter, 16. the first three-phase simulated RLC load, 17. the third low-voltage intelligent switch, 18. the fourth low-voltage intelligent switch, 19. the third intelligent micro-break switch, 20. the first three-phase meter, 21. the first RCD load, 22. the first photovoltaic inverter, 23. the first fault simulation device, 24. the second abnormal operation simulation device, 25. the distribution isolation transformer, 26. the intelligent environmental sensor. DETAILED DESCRIPTION

[0049] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Micro-application testing methods for typical business scenarios in low-voltage smart IoT areas, such as Figure 1 As shown in the figure, the micro-application test is completed through the low-voltage smart IoT area real distribution network simulation test platform, such as Figure 2 As shown, the specific method is as follows:

[0051] S1. The converged terminal virtually tests the edge micro-application according to the type of typical application scenario test;

[0052] S2. The fusion terminal then sends a service message to the data center micro application through the test edge micro application, and tests the alarm function of the terminal based on the response data of the data center micro application to obtain response test data;

[0053] S3. Analyze the response test data. If the response test data shows normal, collect corresponding data and verify the response data. If the response test data shows abnormal, report the abnormal data to the main station to determine the test result.

[0054] The system architecture for implementing the test provided by the present invention is as follows: Figure 3 As shown, it includes partial discharge simulation, photovoltaic simulation, substation topology monitoring, operation log, command window, integrated terminal node monitoring information display, load simulation control, micro-application testing, fault simulation, communication protocol, equipment configuration, operation log recording, and permission management.

[0055] like Figure 4 As shown in the figure, the micro-applications used in the edge-side micro-application test of the converged terminal include maintenance micro-applications, analysis micro-applications, collection micro-applications, and basic micro-applications. The converged terminal interacts with the edge-side micro-applications to perform test control and process execution functions, and interacts with the micro-applications of the terminal device under test through the agreed interface protocol and process. The data obtained by the collection micro-applications is analyzed by the analysis micro-applications, and the information is sent to the main station.

[0056] Among them, the low-voltage smart IoT area real distribution network simulation test platform used in this application is Figure 5 As shown, it includes a low-voltage area simulation structure, the low-voltage area simulation structure is connected to the area fusion terminal through a wireless connection method, the low-voltage area simulation structure is also connected to a low-voltage fault simulation device and a low-voltage intelligent device through wiring terminals in the line, the low-voltage fault simulation device and the low-voltage intelligent device are also connected to the low-voltage area simulation structure through a wireless connection method, and the low-voltage intelligent device is also connected to the low-voltage fault simulation device and the area fusion terminal through a wireless connection method;

[0057] A configuration table formed by the test platform point table is preset in the fusion terminal. The fusion terminal sends control instructions to the micro-application under test through HPLC communication. The micro-application determines the target source code field corresponding to the target instruction encoding according to the mapping relationship of the device point table, and switches to different test scenarios online.

[0058] The low-voltage substation simulation structure includes four levels: distribution transformer side, low-voltage side, user side and line side; the distribution transformer side is connected to the low-voltage side through a low-voltage bus, the low-voltage side is connected to the line side through a low-voltage bus, and the line side is connected to the user side through a low-voltage bus.

[0059] The substation fusion terminal is connected to the distribution transformer side through RS485 or micro-power wireless communication, the substation fusion terminal is connected to the low voltage side through RS485, remote signaling or micro-power wireless communication, the substation fusion terminal is connected to the line side through micro-power wireless or HPLC communication, and the substation fusion terminal is connected to the user side through HPLC communication or by adding a communication conversion unit.

[0060] Among them, the distribution transformer side is used to shunt the current on the low-voltage side of the distribution transformer through the low-voltage bus, and to collect relevant data of the power grid through various control devices and control related equipment; the line side is used to transmit the current shunted through the low-voltage bus through the branch circuit, and simulate the impedance, measurement, and protection in the branch circuit, and sense faults in the branch circuit; the user side is used to simulate the load, fault, and distributed power supply at the end of the branch circuit.

[0061] The equipment on the distribution transformer side is connected to the substation fusion terminal through RS485 or micro-power wireless communication; the equipment on the low voltage side is connected to the substation fusion terminal through RS485, remote signal or micro-power wireless communication; the equipment on the line side is connected to the substation fusion terminal through micro-power wireless or HPLC communication; the equipment on the user side directly collects data through HPLC or adds a communication conversion unit to achieve effective monitoring of user-side perception data.

[0062] Among them Figure 4 As shown, the low-voltage area simulation structure can switch between the TT system and the TNS system. The low-voltage switches in the area all use low-voltage intelligent switches with functions such as topology identification, data collection and upload.

[0063] All access devices are equipped with busbar connection and are compatible with external device access; all access devices and loads are replaceable; remote control switches are integrated before and after the busbar to simulate line short circuit, circuit break and other faults; and the fault point setting of any device can be realized.

[0064] In the micro-application testing method of the present application, the terminal's alarm functions include: power outage and power restoration in the distribution transformer area, voltage and current collection errors, three-phase imbalance, heavy overload, voltage and current distortion rate, power outage and power restoration, low voltage, overvoltage, overcurrent, phase failure, and abnormal line loss.

[0065] Typical application scenario tests include: distribution network operation status perception, distribution business integration improvement, quality service lean management, source network load storage comprehensive optimization, and enterprise platform ecosystem co-construction;

[0066] Furthermore, the distribution network operation status perception includes: distribution transformer operation status monitoring, power supply reliability analysis, low-voltage topology identification, and reactive power compensation monitoring; the improvement of distribution and marketing services includes: substation line loss analysis, substation load forecasting, substation open capacity forecasting, and distribution and marketing local interaction; high-quality service lean management includes: fault location analysis and power quality analysis; comprehensive optimization of source, grid, load and storage includes: distributed power supply consumption and orderly charging of electric vehicles.

[0067] The converged terminal virtually tests edge-side micro-applications based on the types of typical application scenario tests, including:

[0068] When testing the distribution transformer operation status monitoring scenario, the specific steps include:

[0069] Step 1: The fusion terminal collects the basic electrical quantity information of the micro-application, including basic telemetry data such as three-phase current, three-phase voltage, power, and imbalance, and saves the information to the data center. The data update cycle must meet business requirements;

[0070] Step 2: Obtain electrical quantity information from the data center, perform statistical analysis on it by the power quality micro application, and save the statistical analysis results to the data center to achieve real-time perception of power outage, power restoration, imbalance, load imbalance, heavy, overload, overvoltage, overcurrent and other conditions in the distribution transformer area.

[0071] When conducting a power supply reliability analysis scenario test, the specific steps include:

[0072] Step 1: The fusion terminal collects the power outage occurrence / recovery alarm and time data of the low-voltage side of the main transformer through the source micro-application, and saves the information to the data center;

[0073] Step 2: The power quality analysis micro-application analyzes the low-voltage power outage data, including the duration of the low-voltage power outage, the number of power outages, and the power supply reliability rate, and saves the analysis results to the data center.

[0074] When performing low voltage topology identification scenario testing, the specific steps include:

[0075] Step 1: The fusion terminal realizes the transformer, branch, meter box, and physical topology of the substation through the local communication module or by using the signal injection method or the big data analysis method, and generates a relationship file of the substation topology level. The file can be in JSON or XML format and is parsed and displayed at the master station;

[0076] Step 2: The topology recognition micro-application automatically determines whether the smart electricity meter crosses the substation area and the phase it is in, and uploads the substation area physical topology, phase information, and cross-substation area information to the main station in real time through the terminal.

[0077] When testing reactive power compensation monitoring scenarios, the specific steps include:

[0078] Step 1: The intelligent capacitor / SVG device collects information such as the reactive power compensation adjustment device adjustment status, power factor, input capacity, etc., and uploads the information to the master station through the fusion terminal;

[0079] Step 2: The intelligent capacitor / SVG device monitors alarm events such as overvoltage, temperature protection, current harmonics, switching times, equipment hardware failure, capacity attenuation, phase loss, and switching status, and sends the alarm events to the master station through the fusion terminal.

[0080] When conducting a line loss analysis scenario test in a substation, the specific steps include:

[0081] Step 1: The intelligent fusion terminal, the master meter, the LTU, the household smart meter and other devices in the substation area obtain the power data from the data center micro-application, calculate the line loss by phase, locate the abnormal line loss to the phase, and send the alarm event to the main station through the fusion terminal;

[0082] Step 2: The intelligent fusion terminal, the master meter, the LTU, the household smart meter and other devices in the substation area obtain the power data from the data center micro-application, calculate the line loss from the outgoing line to the branch box and from the branch box to the meter box, locate the abnormal line loss to the section, and send the alarm event to the main station through the fusion terminal;

[0083] Step 3: The intelligent fusion terminal, the master meter, the LTU, the household smart meter and other devices in the substation area obtain the power data from the data center micro-application, calculate the line loss according to the time period, locate the line loss anomaly to the time period, and send the alarm event to the main station through the fusion terminal;

[0084] Step 4: The intelligent fusion terminal, the main meter, the LTU, the household smart meter and other devices in the substation area obtain the power data from the data center micro-application, calculate the line loss according to the historical day / month, locate the line loss anomaly to the day / month, and send the alarm event to the main station through the fusion terminal.

[0085] When conducting a scenario test on the available capacity prediction of a substation, the specific steps include:

[0086] Step 1: The intelligent fusion terminal in the substation collects the distribution transformer operation data and obtains the distribution transformer active power, reactive power and rated capacity data from the data center micro-application;

[0087] Step 2: Combined with the rated capacity of the distribution transformer, according to the active power, reactive power and rated capacity information of the distribution transformer, calculate the historical maximum load of the substation, the historical maximum load of the three-phase, the available capacity of the substation, the available capacity of the three-phase, etc., and send the data such as the available capacity of the substation, the available capacity of the three-phase, and the historical maximum load to the distribution master station through the fusion terminal.

[0088] When conducting a load forecast scenario test, the specific steps include:

[0089] Step 1: The fusion terminal collects the operating data of the distribution transformer and box transformer equipment, including basic telemetry data such as three-phase current, three-phase voltage, power, electric energy, ambient temperature, etc.

[0090] Step 2: The fusion terminal saves the historical data of distribution transformer load and power consumption data (minute, day, month) to the data center;

[0091] Step 3: Establish a load forecasting model based on system operation characteristics, capacity expansion decisions, natural conditions, social impacts, etc. Make timely predictions based on influencing factors, and determine the forecast value after appropriate corrections to the forecasting model.

[0092] When conducting a local interactive scenario test, the specific steps include:

[0093] Step 1: Depending on whether the area uses a concentrator, choose to obtain the electric energy meter data from the concentrator or the terminal from the data center, including the voltage, current, power, and power factor of the area's total meter and household meter, and monitor the electricity consumption of users in the area;

[0094] Step 2: Obtain the area household transformer relationship identification and phase relationship identification data through the topology file;

[0095] Step 3: Send the power outage event of each electric energy meter to the alarm event and upload it to the main station through the terminal.

[0096] When performing fault location analysis scenario testing, the specific steps include:

[0097] Step 1: Collect the power outage alarm / recovery, voltage loss alarm / recovery, and overcurrent alarm / recovery alarm events sent from the converged terminal body and devices to the converged terminal data center;

[0098] Step 2: Analyze the network topology of the substation area, locate the fault point, generate equipment fault event information and report it to the master station through the fusion terminal;

[0099] Step 3: The master station receives the equipment fault event information and displays the data in combination with the substation topology structure to achieve rapid location and accurate repair of substation faults.

[0100] When conducting a power quality analysis scenario test, the specific steps include:

[0101] Step 1: The fusion terminal obtains the real-time data volume of the source micro-application and the exchange micro-application communication sampling;

[0102] Step 2: Perform power quality analysis in the substation area, including: three-phase current imbalance, three-phase voltage imbalance, heavy load, overload, voltage and current distortion rate, power outage and restoration, low voltage, overvoltage, phase failure, etc. Generate substation fault event information and report it to the master station through the fusion terminal;

[0103] When conducting distributed power consumption scenario testing, the specific steps include:

[0104] Step 1: According to the specific situation, you can obtain information from the photovoltaic inverter, or install a grid-connected switch, obtain the voltage, current, power, power factor and other remote measurement information of the photovoltaic equipment from the grid-connected switch, daily and monthly power generation and other electric energy information, 21st harmonics, voltage qualification rate, three-phase imbalance and other power quality information, photovoltaic grid-connected status and other remote signal state information, and send the data information to the data center;

[0105] Step 2: According to the terminal voltage and photovoltaic island conditions, control the user's photovoltaic grid connection to ensure stable and reliable operation of the public power grid.

[0106] When testing an electric vehicle orderly charging scenario, the specific steps include:

[0107] Step 1: The intelligent fusion terminal in the substation communicates directly with the charging pile, or communicates through the charging pile monitoring terminal to obtain the voltage, current, active power, reactive power, power, state and other data of the charging pile and send them to the data center;

[0108] Step 2: The intelligent fusion terminal in the area communicates directly with the charging pile, or communicates through the charging pile monitoring terminal to obtain the manufacturer, model, rated power, location and other ledger data of the charging pile and send it to the data center;

[0109] Step 3: The intelligent fusion terminal in the substation communicates directly with the charging pile, or communicates through the charging pile monitoring terminal to obtain abnormal events such as abnormal charging power of the charging pile and abnormal temperature of the charger, and send them to the main station.

[0110] The test data table of typical business scenarios in the substation area includes typical business classification, application scenarios, data sources, supporting data, data density and sampling frequency, as shown in Table 1.

[0111]

[0112]

[0113]

[0114] The present invention detects various functions of edge-side micro-applications deployed in power IoT terminals by simulating typical application scenarios in substations to ensure that micro-applications can meet business requirements, which helps to improve the refined operation and maintenance level of low-voltage distribution networks, improve the compliance of ubiquitous power IoT with standards, and fill the gap in the testing field of ubiquitous power IoT for key information infrastructure in the power industry.

[0115] Example 1

[0116] The micro-application testing method for typical business scenarios in low-voltage smart IoT substations is completed through the low-voltage smart IoT substation real-type distribution network simulation test platform. The specific method is as follows:

[0117] S1. The converged terminal virtually tests the edge micro-application according to the type of typical application scenario test;

[0118] S2. The fusion terminal then sends a service message to the data center micro-application through the test edge micro-application, and tests the alarm function of the terminal based on the response data of the data center micro-application to obtain response test data;

[0119] S3. Analyze the response test data. If the response test data shows normal, collect corresponding data and verify the response data. If the response test data shows abnormal, report the abnormal data to the main station to determine the test result.

[0120] Among them, the low-voltage smart IoT area real distribution network simulation test platform used in this application is Figure 5 As shown, it includes a low-voltage substation simulation structure, the low-voltage substation simulation structure is connected to a fusion terminal through terminals, and the two are also connected through signals. The low-voltage substation simulation structure is also connected to a low-voltage fault simulation device and a low-voltage intelligent device through wiring terminals in the line, and the low-voltage fault simulation device and the low-voltage intelligent device are also connected to the low-voltage substation simulation structure through a wireless connection. The low-voltage intelligent device is also connected to the low-voltage fault simulation device and the substation fusion terminal through a wireless connection.

[0121] A configuration table formed by the test platform point table is preset in the fusion terminal. The fusion terminal sends control instructions to the micro-application under test through HPLC communication. The micro-application determines the target source code field corresponding to the target instruction code according to the mapping relationship of the device point table, and switches to different test scenarios online.

[0122] The low-voltage area simulation structure includes four levels: distribution transformer side, low-voltage side, user side and line side; the distribution transformer side includes distribution isolation transformer, area master meter, intelligent environmental sensor, low-voltage side includes 0.4kV bus, reactive power compensation device, intelligent environmental sensor, low-voltage intelligent switch, user side includes intelligent phase-changing switch, low-voltage intelligent switch, user meter, electric vehicle charging pile, distributed power supply, line side includes low-voltage line, branch box, low-voltage intelligent switch, cable collection terminal;

[0123] The distribution transformer side is used to shunt the current on the low-voltage side of the distribution transformer through the low-voltage bus, and to collect relevant data of the power grid through various control devices and control related equipment; the line side is used to transmit the current shunted through the low-voltage bus through the branch circuit, and simulate the impedance, measurement, and protection in the branch circuit, and sense faults in the branch circuit; the user side is used to simulate the load, fault, and distributed power supply at the end of the branch circuit.

[0124] The equipment on the distribution transformer side is connected to the substation fusion terminal through RS485 or micro-power wireless communication; the equipment on the low voltage side is connected to the substation fusion terminal through RS485, remote signal or micro-power wireless communication; the equipment on the line side is connected to the substation fusion terminal through micro-power wireless or HPLC communication; the equipment on the user side directly collects data through HPLC or adds a communication conversion unit to achieve effective monitoring of user-side perception data.

[0125] Among them Figure 5 As shown, the low-voltage area simulation structure can switch between the TT system and the TNS system. The low-voltage switches in the area all use low-voltage intelligent switches with functions such as topology identification, data collection and upload.

[0126] All access devices are equipped with busbar connection and are compatible with external device access; all access devices and loads are replaceable; remote control switches are integrated before and after the busbar to simulate line short circuit, circuit break and other faults; and the fault point setting of any device can be realized.

[0127] In the micro-application testing method of the present application, the terminal's alarm functions include: power outage and power restoration in the distribution transformer area, voltage and current collection errors, three-phase imbalance, heavy overload, voltage and current distortion rate, power outage and power restoration, low voltage, overvoltage, overcurrent, phase failure, and abnormal line loss.

[0128] Typical application scenario tests include: distribution network operation status perception, distribution business integration improvement, quality service lean management, source network load storage comprehensive optimization, and enterprise platform ecosystem co-construction;

[0129] Furthermore, the distribution network operation status perception includes: distribution transformer operation status monitoring, power supply reliability analysis, low-voltage topology identification, and reactive power compensation monitoring; the improvement of distribution and marketing services includes: substation line loss analysis, substation load forecasting, substation open capacity forecasting, and distribution and marketing local interaction; high-quality service lean management includes: fault location analysis and power quality analysis; comprehensive optimization of source, grid, load and storage includes: distributed power supply consumption and orderly charging of electric vehicles.

[0130] Example 2

[0131] The converged terminal virtually tests edge-side micro-applications based on the types of typical application scenario tests, including:

[0132] When testing the distribution transformer operation status monitoring scenario, the specific steps include:

[0133] Step 1: The fusion terminal collects the basic electrical quantity information of the micro-application, including basic telemetry data such as three-phase current, three-phase voltage, power, and imbalance, and saves the information to the data center. The data update cycle must meet business requirements;

[0134] Step 2: Obtain electrical quantity information from the data center, perform statistical analysis on it by the power quality micro application, and save the statistical analysis results to the data center to achieve real-time perception of power outage, power restoration, imbalance, load imbalance, heavy, overload, overvoltage, overcurrent and other conditions in the distribution transformer area.

[0135] When conducting a power supply reliability analysis scenario test, the specific steps include:

[0136] Step 1: The fusion terminal collects the power outage occurrence / recovery alarm and time data of the low-voltage side of the main transformer through the source micro-application, and saves the information to the data center;

[0137] Step 2: The power quality analysis micro-application analyzes the low-voltage power outage data, including the duration of the low-voltage power outage, the number of power outages, and the power supply reliability rate, and saves the analysis results to the data center.

[0138] When performing low voltage topology identification scenario testing, the specific steps include:

[0139] Step 1: The fusion terminal realizes the transformer, branch, meter box, and physical topology of the substation through the local communication module or by using the signal injection method or the big data analysis method, and generates a relationship file of the substation topology level. The file can be in JSON or XML format and is parsed and displayed at the master station;

[0140] Step 2: The topology recognition micro-application automatically determines whether the smart electricity meter crosses the substation area and the phase it is in, and uploads the substation area physical topology, phase information, and cross-substation area information to the main station in real time through the terminal.

[0141] When testing reactive power compensation monitoring scenarios, the specific steps include:

[0142] Step 1: The intelligent capacitor / SVG device collects information such as the reactive power compensation adjustment device adjustment status, power factor, and input capacity, and uploads the information to the master station through the fusion terminal;

[0143] Step 2: The intelligent capacitor / SVG device monitors alarm events such as overvoltage, temperature protection, current harmonics, switching times, equipment hardware failure, capacity attenuation, phase loss, and switching status, and sends the alarm events to the master station through the fusion terminal.

[0144] When conducting a line loss analysis scenario test in a substation, the specific steps include:

[0145] Step 1: The intelligent fusion terminal, the master meter, the LTU, the household smart meter and other devices in the substation area obtain the power data from the data center micro-application, calculate the line loss by phase, locate the abnormal line loss to the phase, and send the alarm event to the main station through the fusion terminal;

[0146] Step 2: The intelligent fusion terminal, the master meter, the LTU, the household smart meter and other devices in the substation area obtain the power data from the data center micro-application, calculate the line loss from the outgoing line to the branch box and from the branch box to the meter box, locate the abnormal line loss to the section, and send the alarm event to the main station through the fusion terminal;

[0147] Step 3: The intelligent fusion terminal, the master meter, the LTU, the household smart meter and other devices in the substation area obtain the power data from the data center micro-application, calculate the line loss according to the time period, locate the line loss anomaly to the time period, and send the alarm event to the main station through the fusion terminal;

[0148] Step 4: The intelligent fusion terminal, the main meter, the LTU, the household smart meter and other devices in the substation area obtain the power data from the data center micro-application, calculate the line loss according to the historical day / month, locate the line loss anomaly to the day / month, and send the alarm event to the main station through the fusion terminal.

[0149] When conducting a scenario test on the available capacity prediction of a substation, the specific steps include:

[0150] Step 1: The intelligent fusion terminal in the substation collects the distribution transformer operation data and obtains the distribution transformer active power, reactive power and rated capacity data from the data center micro-application;

[0151] Step 2: Combined with the rated capacity of the distribution transformer, according to the active power, reactive power and rated capacity information of the distribution transformer, calculate the historical maximum load of the substation, the historical maximum load of the three-phase, the available capacity of the substation, the available capacity of the three-phase, etc., and send the data such as the available capacity of the substation, the available capacity of the three-phase, and the historical maximum load to the distribution master station through the fusion terminal.

[0152] When conducting a load forecast scenario test, the specific steps include:

[0153] Step 1: The fusion terminal collects the operating data of the distribution transformer and box transformer equipment, including basic telemetry data such as three-phase current, three-phase voltage, power, electric energy, ambient temperature, etc.

[0154] Step 2: The fusion terminal saves the historical data of distribution transformer load and power consumption data (minute, day, month) to the data center;

[0155] Step 3: Establish a load forecasting model based on system operation characteristics, capacity expansion decisions, natural conditions, social impacts, etc. Make timely predictions based on influencing factors, and determine the forecast value after appropriate corrections to the forecasting model.

[0156] When conducting a local interactive scenario test, the specific steps include:

[0157] Step 1: Depending on whether the area uses a concentrator, choose to obtain the electric energy meter data from the concentrator or the terminal from the data center, including the voltage, current, power, and power factor of the area's total meter and household meter, and monitor the electricity consumption of users in the area;

[0158] Step 2: Obtain the area household transformer relationship identification and phase relationship identification data through the topology file;

[0159] Step 3: Send the power outage events of each electric energy meter as alarm events and upload them to the main station through the terminal.

[0160] When performing fault location analysis scenario testing, the specific steps include:

[0161] Step 1: Collect the power outage alarm / recovery, voltage loss alarm / recovery, and overcurrent alarm / recovery alarm events sent from the converged terminal body and devices to the converged terminal data center;

[0162] Step 2: Analyze the network topology of the substation area, locate the fault point, generate equipment fault event information and report it to the master station through the fusion terminal;

[0163] Step 3: The master station receives the equipment fault event information and displays the data in combination with the substation topology structure to achieve rapid location and accurate repair of substation faults.

[0164] When conducting a power quality analysis scenario test, the specific steps include:

[0165] Step 1: The fusion terminal obtains the real-time data volume of the source micro-application and the exchange micro-application communication sampling;

[0166] Step 2: Perform power quality analysis in the substation area, including: three-phase current imbalance, three-phase voltage imbalance, heavy load, overload, voltage and current distortion rate, power outage and restoration, low voltage, overvoltage, phase failure, etc. Generate substation fault event information and report it to the master station through the fusion terminal;

[0167] When conducting distributed power consumption scenario testing, the specific steps include:

[0168] Step 1: According to the specific situation, you can obtain information from the photovoltaic inverter, or install a grid-connected switch, obtain the voltage, current, power, power factor and other remote measurement information of the photovoltaic equipment from the grid-connected switch, daily and monthly power generation and other electric energy information, 21st harmonics, voltage qualification rate, three-phase imbalance and other power quality information, photovoltaic grid-connected status and other remote signal state information, and send the data information to the data center;

[0169] Step 2: According to the terminal voltage and photovoltaic island conditions, control the user's photovoltaic grid connection to ensure stable and reliable operation of the public power grid.

[0170] When testing an electric vehicle orderly charging scenario, the specific steps include:

[0171] Step 1: The intelligent fusion terminal in the substation communicates directly with the charging pile, or communicates through the charging pile monitoring terminal to obtain the voltage, current, active power, reactive power, power, state and other data of the charging pile and send them to the data center;

[0172] Step 2: The intelligent fusion terminal in the area communicates directly with the charging pile, or communicates through the charging pile monitoring terminal to obtain the manufacturer, model, rated power, location and other ledger data of the charging pile and send it to the data center;

[0173] Step 3: The intelligent fusion terminal in the substation communicates directly with the charging pile, or communicates through the charging pile monitoring terminal to obtain abnormal events such as abnormal charging power of the charging pile and abnormal temperature of the charger, and send them to the main station.

[0174] Example 3

[0175] like Figure 5 As shown, the distribution transformer side of the substation includes a substation distribution isolation transformer 25. The low-voltage side of the substation distribution isolation transformer 25 is connected to the low-voltage bus at the power output end through a low-voltage intelligent leakage protection switch. It also includes an intelligent environmental sensor 26. A low-voltage outgoing line on the low-voltage bus is connected to the intelligent environmental sensor 26 through a low-voltage intelligent switch and then connected to the line side.

[0176] The low-voltage side includes a total meter 1 for the substation area, a first multi-function meter 3, a first phase-changing switch relay 4 and a first reactive power compensation device 5. The total meter 1 for the substation area, the first multi-function meter 3, the first phase-changing switch relay 4 and the first reactive power compensation device 5 are arranged in parallel and are respectively connected through the low-voltage outlet line of the low-voltage busbar;

[0177] The line side includes a No. 1 branch box and a No. 2 branch box, the No. 1 branch box includes a first low-voltage intelligent switch 7, the first low-voltage intelligent switch 7 is electrically connected to two second low-voltage intelligent switches 8, one of the low-voltage outlet lines of the second low-voltage intelligent switch 8 is electrically connected to three parallel first intelligent phase-changing switches 9, the three first intelligent phase-changing switches 9 are electrically connected to a first single-phase meter 11, each first single-phase meter 11 is connected to the first intelligent phase-changing switch 9 The wire is provided with a first intelligent micro-break switch 10, the three first single-phase meters 11 are commonly connected to a first single-phase simulated RLC load 12, and the other first Two second intelligent phase-changing switches 13 are electrically connected to the low-voltage output lines of the two low-voltage intelligent switches 8, and the two second intelligent phase-changing switches 13 are electrically connected to three second intelligent micro-break switches 14, respectively. Each second intelligent micro-break switch 14 is electrically connected to a second single-phase meter 15, and the output ends of the six second single-phase meters 15 are respectively connected to terminals, and also include a first three-phase simulated RLC load 16. The first three-phase simulated RLC load 16 can be connected to the three second single-phase meters 15 connected to the output end of any second intelligent phase-changing switch 13 through terminals. Here, it can be connected to the corresponding second single-phase meter 15 according to actual conditions.

[0178] The No. 2 branch box includes a third low-voltage intelligent switch 17, and the third low-voltage intelligent switch 17 is electrically connected to two fourth low-voltage intelligent switches 18, one of the fourth low-voltage intelligent switches 18 is connected to a terminal at the output end, which is a reserved interface for the load grounding side, and can simulate faults such as poor grounding, and the other fourth low-voltage intelligent switch 18 is electrically connected to three third intelligent micro-break switches 19, each of which is electrically connected to a first three-phase meter 20, each of which is electrically connected to a first RCD load 21, a first photovoltaic inverter 22 and a terminal, and the first photovoltaic inverter 22 is electrically connected to a photovoltaic simulation power supply;

[0179] The station area also includes a first fault simulation device 23 and a second abnormal operation simulation device 24. The first fault simulation device 23 and the second abnormal operation simulation device 24 can be connected to corresponding terminals as needed;

[0180] All access devices are equipped with busbar connection and are compatible with external device access. All access devices are replaceable. Remote control switches are integrated before and after the busbar and connected to fault simulation devices to simulate line short circuit, open circuit and other faults.

Claims

1. A micro-application testing method for typical business scenarios in low-voltage smart IoT areas, characterized in that: This is accomplished through the low-voltage smart IoT real-type distribution network simulation test platform. The specific method is as follows: S1. Use the fusion terminal in the low-voltage smart IoT area real distribution network simulation test platform to virtually test edge-side micro-applications according to the type of typical application scenario test; S2. The fusion terminal then sends a service message to the data center micro-application through the test edge micro-application, and tests the alarm function of the terminal based on the response data of the data center micro-application to obtain response test data; S3. Analyze the response test data. If the response test data shows normal, collect corresponding data and verify the response data. If the response test data shows abnormal, report the abnormal data to the main station to determine the test result.

2. According to claim 1, the micro-application testing method for typical business scenarios in low-voltage smart IoT areas is characterized in that: The types of typical application scenario tests in S1 include: distribution network operation status perception, distribution business integration improvement, quality service lean management, source network load storage comprehensive optimization, enterprise platform ecosystem co-construction; The distribution network operation status perception includes: distribution transformer operation status monitoring, power supply reliability analysis, low voltage topology identification, and reactive power compensation monitoring; the marketing and distribution business integration improvement includes: substation line loss analysis, substation load forecasting, substation open capacity forecasting, and marketing and distribution local interaction; the high-quality service lean management includes: fault location analysis and power quality analysis; the source, grid, load and storage comprehensive optimization includes: distributed power supply consumption and orderly charging of electric vehicles.

3. According to claim 2, the micro-application testing method for typical business scenarios in low-voltage smart IoT areas is characterized in that: The fusion terminal in S1 virtually tests the edge-side micro-application according to the type of typical application scenario test, and the specific method is as follows: When testing the distribution transformer operation status monitoring scenario, the fusion terminal collects the basic electrical quantity information of the exchange micro-application, including three-phase current, three-phase voltage, power, and imbalance, and saves the information to the data center. The data update cycle must meet business needs; the electrical quantity information is obtained from the data center, and the power quality micro-application performs statistical analysis on it, and the statistical analysis results are saved to the data center to achieve real-time perception of power outage, power restoration, imbalance, load imbalance, heavy, overload, overvoltage, and overcurrent status in the distribution transformer area; When conducting power supply reliability analysis scenario testing, the fusion terminal collects the power outage occurrence / recovery alarm and time data on the low-voltage side of the main transformer, and saves the information to the data center. The power quality analysis micro-application analyzes the power outage data of the low-voltage area, including the power outage duration, number of power outages, and power supply reliability rate of the low-voltage area, and saves the analysis results to the data center; When conducting low-voltage topology identification scenario testing, the fusion terminal uses the local communication module or big data analysis method to realize the transformer, branch, meter box, and physical topology of the substation area, automatically judge whether the smart electric energy meter crosses the substation area and the phase it is in, and upload the substation area physical topology, phase information, and cross-substation area information to the main station through the terminal; When testing the reactive power compensation monitoring scenario, the intelligent capacitor / SVG device collects information to monitor the reactive power compensation adjustment device's adjustment status, power factor, input capacity and other information, and uploads the information to the master station through the fusion terminal; When conducting a line loss analysis scenario test in a substation, the substation segment and phase line losses are calculated through the substation intelligent fusion terminal, substation master meter, LTU, household smart meter and other equipment, and the abnormal line loss is sent as an alarm event and uploaded to the main station through the fusion terminal; When conducting a scenario test on the available capacity prediction of a substation, the distribution transformer operation data is collected through the substation intelligent fusion terminal, and the available capacity of the substation is calculated based on the rated capacity of the distribution transformer, and the data is sent to the distribution master station; When conducting a load forecasting scenario test for a substation, the fusion terminal collects the operating data of distribution transformers and box transformers, including basic telemetry data such as three-phase current, three-phase voltage, power, electric energy, and ambient temperature, and saves the historical data of distribution transformer load and power consumption data to the data center; When testing the local interactive scenario of marketing and distribution, choose to obtain the electric energy meter data from the concentrator or the terminal from the data center, depending on whether the station area uses a concentrator, monitor the power consumption of users in the station area, send the power outage events of each electric energy meter as alarm events, and upload them to the main station through the terminal; When testing the fault location analysis scenario, collect the power outage alarm / recovery, voltage loss alarm / recovery, and overcurrent alarm / recovery alarm events sent to the converged terminal data center from the converged terminal body and the device, analyze them in combination with the substation network topology, locate the fault point, generate equipment fault event information and report it to the master station. The master station receives the equipment fault event information and displays the data in combination with the substation topology, thus realizing rapid location and accurate repair of substation faults. When conducting power quality analysis scenario testing, the real-time data volume of terminal AC sampling is integrated, and the power quality analysis of the substation is performed, including the three-phase current imbalance, three-phase voltage imbalance, heavy load, overload, voltage and current distortion rate, power outage and restoration, low voltage, overvoltage, phase failure, etc. in the substation, and the substation fault event information is generated and reported to the main station; When conducting distributed power consumption scenario testing, according to the specific situation, information can be obtained from the photovoltaic inverter, or a grid-connected switch can be installed to obtain remote measurements such as voltage, current, power, and power factor of the photovoltaic equipment, daily and monthly power generation and other electric energy information, 21st harmonics, voltage qualification rate, three-phase imbalance and other power quality information, photovoltaic grid-connected status and other remote signal state information from the grid-connected switch, and the data information is sent to the data center through the fusion terminal; When conducting an orderly charging scenario test for electric vehicles, the intelligent fusion terminal in the area communicates directly with the charging pile, or communicates through the charging pile monitoring terminal, obtains the manufacturer, model, rated power, location and other ledger data of the charging pile and sends them to the data center, obtains abnormal events such as abnormal charging power of the charging pile and abnormal temperature of the charger and sends them to the main station.

4. According to claim 1, the micro-application testing method for typical business scenarios in low-voltage smart IoT areas is characterized in that: The alarm functions of the terminal in S2 include: power outage and power restoration in the distribution transformer area, voltage and current collection errors, three-phase imbalance, heavy overload, voltage and current distortion rate, power outage and power restoration, low voltage, overvoltage, overcurrent, phase failure, and abnormal line loss.

5. According to claim 1, the micro-application testing method for typical business scenarios in low-voltage smart IoT areas is characterized in that: The low-voltage smart IoT substation real-type distribution network simulation test platform includes a low-voltage substation simulation structure, the low-voltage substation simulation structure is connected to a substation fusion terminal through a wireless connection method, the low-voltage substation simulation structure is also connected to a low-voltage fault simulation device and a low-voltage intelligent device through wiring terminals in the line, the low-voltage fault simulation device and the low-voltage intelligent device are also connected to the low-voltage substation simulation structure through a wireless connection method, and the low-voltage intelligent device is also connected to the low-voltage fault simulation device and the substation fusion terminal through a wireless connection method; A configuration table formed by a test platform point table is preset in the fusion terminal, and the fusion terminal sends control instructions to the micro-application under test through HPLC communication; the micro-application determines the target source code field corresponding to the target instruction encoding according to the mapping relationship of the device point table, and switches to different test scenarios online.

6. According to claim 5, the micro-application testing method for typical business scenarios in low-voltage smart IoT areas is characterized in that: The low-voltage area simulation structure includes four levels: distribution transformer side, low-voltage side, user side and line side; the distribution transformer side is connected to the low-voltage side through a low-voltage bus, the low-voltage side is connected to the line side through a low-voltage bus, and the line side is connected to the user side through a low-voltage bus; The substation fusion terminal is connected to the distribution transformer side through RS485 or micro-power wireless communication, the substation fusion terminal is connected to the low voltage side through RS485, remote signaling or micro-power wireless communication, the substation fusion terminal is connected to the line side through micro-power wireless or HPLC communication, and the substation fusion terminal is connected to the user side through HPLC communication or by adding a communication conversion unit.

7. The micro-application testing method for typical business scenarios in low-voltage smart IoT areas according to claim 6 is characterized in that: The distribution transformer side is used to shunt the current on the low-voltage side of the distribution transformer through the low-voltage bus, and to collect relevant data of the power grid through various control devices and control relevant equipment; the line side is used to transmit the current shunted through the low-voltage bus through the branch circuit, and to simulate the impedance, measurement, and protection in the branch circuit, and to sense faults in the branch circuit; the user side is used to simulate the load, fault, and distributed power supply at the end of the branch circuit.

8. The micro-application testing method for typical business scenarios in low-voltage smart IoT areas according to claim 6 is characterized in that: The equipment on the distribution transformer side is connected to the fusion terminal through RS485 or micro-power wireless communication; the equipment on the low voltage side is connected to the fusion terminal through RS485, remote signal or micro-power wireless communication; the equipment on the line side is connected to the substation terminal through micro-power wireless or HPLC communication; the equipment on the user side directly collects data through HPLC or adds a communication conversion unit to achieve effective monitoring of user-side perception data.

Images