An efficient low-voltage power distribution internet of things real scene simulation training system

Abstract

The application discloses a kind of efficient low-voltage power distribution Internet of Things real scene simulation training system, including simulation training system, simulation training system includes power supply system, analog primary system, communication system, secondary control system and power distribution Internet of Things monitoring training system, analog primary system is connected with communication system, secondary control system and power distribution Internet of Things monitoring training system are connected with communication system to carry out information interaction, analog primary system is used to simulate real low-voltage power distribution Internet of Things primary operation scene, secondary control system is used to control the simulation process of analog primary system, power distribution Internet of Things monitoring training system is used to carry out system operation characteristic training and monitor secondary control system, power supply system is electrically connected with analog primary system, the present application can carry out training with only a few professionals, train and examine numerous students, greatly improve training efficiency, greatly reduce the input of manpower, material resources and financial resources of training and examination work.

Description

Technical Field

[0001] This invention relates to the field of IoT real-scene simulation training system technology, specifically a high-efficiency low-voltage power distribution IoT real-scene simulation training system. Background Technology

[0002] With the continuous and in-depth development of the distribution Internet of Things (IoT), low-voltage distribution substations are facing the access of a massive number of low-voltage smart terminals. These terminals are more diverse and numerous, but their performance configurations are generally lower. Furthermore, due to a lack of prior attention to the construction of low-voltage distribution substations in the early stages, there are many problems such as low equipment standardization and a large workload for terminal installation and commissioning. This has led to a rapid increase in the demand for installation, commissioning, operation, maintenance, and testing personnel in low-voltage distribution substations, placing higher demands on the skill levels of low-voltage distribution personnel. Current low-voltage distribution training devices mainly target traditional distribution networks primarily using conventional circuit breakers and energy meters for tasks such as meter installation and wiring, and fault diagnosis. There are currently no relevant training products for newly connected low-voltage smart terminals.

[0003] To address this, we propose a highly efficient low-voltage power distribution IoT real-world simulation training system. Summary of the Invention

[0004] In view of the problems existing in the above and / or existing efficient low-voltage power distribution Internet of Things (IoT) real-scene simulation training systems, this invention is proposed.

[0005] Therefore, the purpose of this invention is to provide an efficient low-voltage power distribution Internet of Things (IoT) real-world simulation training system that can solve the aforementioned existing problems.

[0006] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0007] A highly efficient low-voltage power distribution IoT real-world simulation training system includes a simulation training system comprising a power supply system, a simulated primary system, a communication system, a secondary control system, and a power distribution IoT monitoring and training system. The simulated primary system is communicatively connected to the communication system. The secondary control system and the power distribution IoT monitoring and training system are both communicatively connected to the communication system for information exchange. The simulated primary system is used to simulate real low-voltage power distribution IoT primary operation scenarios. The secondary control system is used to control the simulation process of the simulated primary system. The power distribution IoT monitoring and training system is used to provide training on system operation characteristics and monitor the secondary control system. The power supply system is electrically connected to the simulated primary system to provide power.

[0008] Optionally, the simulated primary system includes a residual current circuit breaker, a capacitor bank, a smart meter, a smart miniature circuit breaker, a load simulation device, and a fault occurrence device. The residual current circuit breaker is connected in the simulated power distribution line to protect the residual current in the simulated power distribution line. The capacitor bank is connected in parallel at the system bus to compensate for reactive power in the simulated primary system. The smart meter is connected in series in the simulated power distribution line to monitor the power consumption of downstream lines in the simulated power distribution line. The load simulation device is connected in series at the end of the simulated power distribution line to simulate the active and reactive power output of the load in the simulated power distribution line. The fault occurrence device is connected in parallel in the simulated power distribution line to simulate real faults occurring in the field. The smart miniature circuit breaker is connected between the end of the simulated power distribution line and the upstream of the load simulation device to protect the simulated power distribution line.

[0009] Optionally, the secondary control system includes a fusion terminal, a distribution IoT integrated cabinet, an isolation transformer cabinet, a fault simulation cabinet, a load simulation cabinet, a distribution IoT simulation training software module, a line simulation cabinet, a power supply load cabinet, and a photovoltaic simulation cabinet. The fusion terminal is used to collect analog quantity information from intelligent devices in the low-voltage distribution IoT and upload the analog quantity information to the distribution IoT monitoring and training system through the communication system. The isolation transformer cabinet is used to provide electrical isolation for the low-voltage distribution IoT distribution area. The fault simulation cabinet is used to simulate low-voltage faults in the low-voltage distribution IoT network. The load simulation cabinet and the power supply load cabinet are used to provide power to the simulated low-voltage distribution IoT network. The network provides simulated loads. The photovoltaic simulation cabinet is used to simulate the output characteristics of photovoltaic distributed power sources in the simulated low-voltage distribution IoT to enrich the operation scenarios of the low-voltage distribution IoT. The line simulation cabinet is used to simulate the operation characteristics of distribution lines in the simulated low-voltage distribution IoT under real operating conditions. The distribution IoT simulation training software module is used to receive the simulated quantity information uploaded by the fusion terminal and send instructions to the fault simulation cabinet, the load simulation cabinet and the photovoltaic simulation cabinet to control the fault settings of the fault simulation cabinet, set the active and reactive power of the load simulation cabinet and the energy feed load cabinet, and adjust the output power of the photovoltaic simulation cabinet.

[0010] Optionally, the analog information includes voltage information and current information, the low-voltage fault includes at least one of two-phase short circuit, three-phase short circuit, two-phase short circuit to ground, single-phase ground, leakage current, overvoltage and undervoltage, and the analog load includes at least one of three-phase load, single-phase load and energy-feedable load.

[0011] Optionally, the power distribution IoT monitoring and training system includes a system principle training module, a converged terminal monitoring module, a training scenario management module, and an APP function display module. The system principle training module is used to train on the operating characteristics of the simulated primary system. The converged terminal monitoring module connects the converged terminal to the training workstation via a serial port or network port and displays the information collected by the converged terminal. The training scenario management module is used for one-click distribution and management of training scenarios. The APP function display module communicates with the fault simulation cabinet, the load simulation cabinet, and the photovoltaic simulation cabinet through the power distribution IoT simulation training software module to realize dedicated load supply, protection function verification, distributed energy collaborative optimization, power quality management, and reporting of power outage and restoration events.

[0012] Optionally, the system principle training module includes a power distribution IoT basic training unit, a terminal equipment principle training unit, and a communication protocol training unit.

[0013] Optionally, the fusion terminal monitoring module is also used for the distribution radio area network setup.

[0014] Optionally, the training scenarios managed by the training scenario management module include power quality management scenarios, fault scenarios, and load scenarios.

[0015] Optionally, the APP function display module includes topology identification, line loss calculation, and fault assessment.

[0016] Compared with existing technologies:

[0017] This invention has the following characteristics:

[0018] 1. This system builds real terminal equipment, communication system and monitoring system for low-voltage power distribution Internet of Things (IoT), including actual integrated terminals, residual current circuit breakers, smart meters, concentrators, low-voltage branch monitoring terminals and other real smart distribution area terminal equipment, to simulate the real operation process of low-voltage power distribution network. By using real smart terminal equipment in low-voltage distribution areas, trainees can have a firsthand experience of the working principle, communication protocol, connection method and application function of smart terminal equipment, and gain a comprehensive understanding of low-voltage power distribution IoT.

[0019] 2. This system can simulate typical power distribution faults. Short circuit and ground faults can be added at each level of the three-level power distribution in the low-voltage distribution area. The ground fault mainly simulates the common equipment shell grounding fault in the TT grounding system. The grounding leakage resistance is adjustable in stages. At the same time, it can simulate the shell fault in the TN grounding system. The grounding resistance is adjustable in stages, realizing the electrical characteristics of real faults in low-voltage power distribution.

[0020] 3. This system can not only simulate common low-voltage grounding faults, but also normal load currents. By simulating the connection of low-voltage inductive loads, it can simulate power consumption scenarios in low-voltage distribution areas such as low power factor, unbalanced three-phase loads, and overload.

[0021] 4. This system can set up three levels of residual current protection for low-voltage power distribution. Residual current protection and fault simulation can be set up for levels one, two, and three. The residual current protection value, action time and other parameters can be set through the integrated terminal or locally to realize simulation training and teaching of abnormal handling of three levels of residual current protection.

[0022] 5. This system can realize the actual primary wiring and communication connection of low-voltage distribution area terminal equipment, demonstrate various communication connection methods of low-voltage terminal equipment, and conduct simulation training on communication protocols;

[0023] 6. This system has a complete advanced application APP for low-voltage distribution areas, which can be installed and its functions can be demonstrated. It can realize scenario simulation and application function training for low-voltage network topology management, distribution area and phase identification, power quality management, low-voltage fault analysis, etc.

[0024] 7. This system can be used in conjunction with a monitoring and management system, which can be used to quickly build scenarios and display application scenarios;

[0025] 8. The system requires only a small number of professionals to conduct training, train and assess a large number of trainees, greatly improves training efficiency, and significantly reduces the human, material and financial resources required for training and assessment. Attached Figure Description

[0026] Figure 1 This is an overall structural diagram of the efficient low-voltage power distribution Internet of Things (IoT) real-scene simulation training system described in this invention.

[0027] Figure 2 This is a structural block diagram of the efficient low-voltage power distribution Internet of Things (IoT) real-scene simulation training system described in this invention.

[0028] Figure 3 This is a structural block diagram of the power supply system in the efficient low-voltage power distribution Internet of Things real-world simulation training system described in this invention.

[0029] Figure 4 This is a structural block diagram of a simulation in the efficient low-voltage power distribution Internet of Things (IoT) real-world simulation training system described in this invention.

[0030] Figure 5 This is a structural block diagram of the secondary control system in the efficient low-voltage power distribution Internet of Things (IoT) real-scene simulation training system described in this invention.

[0031] Figure 6This is a structural block diagram of the power distribution IoT monitoring and training system in the efficient low-voltage power distribution IoT real-scene simulation training system described in this invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0033] This invention provides a highly efficient low-voltage power distribution IoT real-world simulation training system. Please refer to [link / reference]. Figures 1-6 The system includes a simulation training system 1, which comprises a power supply system 2, a simulated primary system 3, a communication system 4, a secondary control system 5, and a power distribution IoT monitoring and training system 6. The simulated primary system 3 is communicatively connected to the communication system 4. The secondary control system 5 and the power distribution IoT monitoring and training system 6 are both communicatively connected to the communication system 4 for information exchange. The simulated primary system 3 is used to simulate real low-voltage power distribution IoT primary operation scenarios. The secondary control system 5 is used to control the simulation process of the simulated primary system 3. The power distribution IoT monitoring and training system 6 is used to conduct system operation characteristic training and monitor the secondary control system 5. The power supply system 2 is electrically connected to the simulated primary system 3 to provide power.

[0034] In this embodiment, the simulation training system builds a real primary and secondary control system by simulating a low-voltage distribution IoT network, simulating the low-voltage distribution IoT in a real operating environment. By utilizing the modular settings of the distribution IoT monitoring and training system, it completes information collection and scene management of the primary system, communication interaction of the secondary system, and functional demonstration of advanced applications, thereby completing real-world simulation training for the low-voltage distribution IoT.

[0035] The power supply system 2 provides a safe power supply for simulating a low-voltage power distribution network, ensuring personnel safety and realistic simulation of power grid operation. The power supply is AC380V with a rated power of 100kVA. The operating environment temperature is -10℃ to +40℃, the storage environment temperature is -20℃ to +70℃, and the humidity is ≤90% with no condensation.

[0036] In some embodiments, the simulated primary system 3 includes a residual current circuit breaker, a capacitor bank, a smart meter, a smart miniature circuit breaker, a load simulation device, and a fault generation device. The residual current circuit breaker is connected in the simulated power distribution line to protect the residual current in the simulated power distribution line. The capacitor bank is connected in parallel at the system bus to provide reactive power compensation for the simulated primary system 3. The smart meter is connected in series in the simulated power distribution line to monitor the power consumption of downstream lines in the simulated power distribution line. The load simulation device is connected in series at the end of the simulated power distribution line to simulate the active and reactive power output of the on-site load in the simulated power distribution line. The fault generation device is connected in parallel in the simulated power distribution line to simulate real faults occurring on-site. The smart miniature circuit breaker is connected between the end of the simulated power distribution line and the upstream of the load simulation device to protect the simulated power distribution line.

[0037] In this embodiment, the simulated primary system 3 is used to reproduce the actual operation scenario of a real low-voltage power distribution Internet of Things (IoT) system, including typical equipment in the aforementioned low-voltage power distribution IoT primary system. Specifically, the simulated primary system 3 builds a simple low-voltage power distribution simulation network, uses a power system to simulate the actual operation of a power distribution network, uses a fault generation device to simulate common low-voltage faults with different grounding methods, uses terminal equipment such as residual current circuit breakers, energy meters, low-voltage branch monitoring terminals, and smart capacitors to construct a low-voltage IoT distribution area network, and uses LED strips to reflect the live indication of the distribution area, intuitively reflecting the circuit breaker fault handling results.

[0038] In the simulated primary system 3, the smart meter is one of the basic devices for data acquisition in the smart grid. It undertakes the tasks of collecting, measuring, and transmitting raw electrical energy data. It is the foundation for realizing information integration, analysis and optimization, and information display. In addition to the basic electricity metering function of traditional electricity meters, smart meters also have intelligent functions such as bidirectional multi-rate metering, user-end control function, bidirectional data communication function with multiple data transmission modes, and anti-theft function in order to adapt to the use of smart grids and new energy sources.

[0039] The residual current circuit breaker can realize the protection function of residual current in the power distribution line. Once the residual current in the line exceeds the protection setting value, the residual current circuit breaker will trip and cut off the downstream power supply to prevent personal and equipment safety problems. The device is connected in series in the line.

[0040] Communication system 4 provides communication between analog devices, converged terminals, and monitoring and training systems.

[0041] In some embodiments, the secondary control system 5 includes a fusion terminal, a distribution IoT integrated cabinet, an isolation transformer cabinet, a fault simulation cabinet, a load simulation cabinet, a distribution IoT simulation training software module, a line simulation cabinet, an energy feeder load cabinet, and a photovoltaic simulation cabinet. The fusion terminal is used to collect analog quantity information from intelligent devices in the low-voltage distribution IoT and upload the analog quantity information to the distribution IoT monitoring and training system 6 through the communication system 4. The isolation transformer cabinet is used to provide electrical isolation for the low-voltage distribution IoT distribution area. The fault simulation cabinet is used to simulate low-voltage faults in the low-voltage distribution IoT network. The load simulation cabinet and the energy feeder load cabinet are used to provide simulated loads for the simulated low-voltage distribution IoT. The photovoltaic simulation cabinet is used to simulate the output characteristics of photovoltaic distributed power sources in the simulated low-voltage distribution IoT to enrich the operating field of the low-voltage distribution IoT. The circuit simulation cabinet is used to simulate the operating characteristics of the power distribution lines in the simulated low-voltage power distribution IoT under real operating conditions. The power distribution IoT simulation training software module is used to receive the analog quantity information uploaded by the fusion terminal and send instructions to the fault simulation cabinet, the load simulation cabinet, and the photovoltaic simulation cabinet to control the fault settings of the fault simulation cabinet, set the active and reactive power of the load simulation cabinet and the energy feed load cabinet, and adjust the output power of the photovoltaic simulation cabinet. The power distribution IoT integrated cabinet is electrically connected to the circuit simulation cabinet, the load simulation cabinet, the energy feed load cabinet, the photovoltaic simulation cabinet, and the fusion terminal to complete the fault simulation function of the circuit. The switch, the training workstation, and the power distribution IoT simulation training software module form a host computer monitoring system and communicate with the fusion terminal through a serial port or network port to realize information management.

[0042] The analog information includes voltage and current information. The low-voltage fault includes at least one of two-phase short circuit, three-phase short circuit, two-phase short circuit to ground, single-phase ground, leakage, overvoltage, and undervoltage. The analog load includes at least one of three-phase load, single-phase load, and rechargeable load.

[0043] Specifically, the fusion terminal collects analog data such as voltage and current from smart devices in the low-voltage distribution IoT and uploads it to the distribution IoT monitoring and training system. This system comprehensively manages the information in the simulation training system. The isolation transformer cabinet provides electrical isolation for the low-voltage distribution IoT distribution area. The fault simulation cabinet can simulate typical low-voltage faults in the low-voltage distribution IoT, including two-phase short circuits, three-phase short circuits, two-phase short-circuit to ground, single-phase ground, leakage, overvoltage, and undervoltage. The load simulation cabinet and the energy-feeding load cabinet primarily provide effective load simulation for the simulated distribution IoT, simulating three-phase loads, single-phase loads, and energy-feeding loads. The distribution IoT simulation training software receives analog data uploaded by the fusion terminal and controls the fault settings of the fault simulation cabinet, sets the active and reactive power of the load simulation cabinet and energy-feeding load cabinet, and adjusts the output power of the photovoltaic simulation cabinet by issuing commands. The photovoltaic simulation cabinet mainly simulates the output characteristics of photovoltaic distributed power sources in the low-voltage distribution IoT, enriching the operating scenarios of the low-voltage distribution IoT. The line simulation cabinet can simulate the operating characteristics of transmission and distribution lines under real operating conditions.

[0044] The power distribution IoT integrated cabinet connects to a ring network box with one input and N outputs, which includes line simulation cabinets, load simulation cabinets, energy feed load cabinets, and photovoltaic simulation cabinets. The integrated terminal is connected to the secondary side of the input line, and any line at the output line can be connected in series with a fault simulation cabinet to complete the fault simulation function of that line. The switch, training workstation, and power distribution IoT simulation training software form a host computer monitoring system, which communicates with the downstream integrated terminal through network port or serial port to comprehensively manage equipment information.

[0045] Isolation transformer cabinet: Rated voltage: 380V, turns ratio: 0.38 / 0.38kV, connection method: YN / YN, short-circuit impedance ratio: 4%, capacity: 100kVA;

[0046] Load simulation cabinet: Rated voltage: 380V, Rated power: 30kW resistor, 30kVA inductor, Load regulation accuracy: independent phase control, 0.1kW resistor, 0.1kVA inductor, Load accuracy: ±5%, Control method: local / remote switching, Protection function: emergency stop protection, over-temperature protection, over-temperature alarm;

[0047] Fault simulation cabinet: Simulates low-voltage short circuit, grounding, and leakage faults with different currents. Among them, short circuit current: 60A / 80A / 100A selectable, grounding fault: 2A / 4A / 6A selectable, leakage fault: 100mA / 300mA / 500mA selectable, control method: local / remote switching;

[0048] The power distribution IoT integrated cabinet includes a low-voltage distribution area consisting of a simulated low-voltage distribution area network, residual current protection circuit breakers, smart meters, light strips, smart capacitors, smart miniature circuit breakers, low-voltage branch monitoring units, and integrated terminals.

[0049] 1. Simulated low-voltage distribution network structure:

[0050] a. The size of the space frame is customized according to requirements;

[0051] b. Fault points are customized according to requirements;

[0052] 2. Residual current protection circuit breaker:

[0053] a. Number of poles: 3P + N;

[0054] b. Rated current: 125A;

[0055] c. Rated voltage: 400V;

[0056] d. Measurement accuracy of current and voltage: Class 1;

[0057] e. Active and reactive power accuracy: Level 2;

[0058] f. Communication interface: It has a standard interface with local communication interface (RS-485) and HPLC communication mode;

[0059] 3. Smart meters:

[0060] a. Accuracy level: Level 1 for active power, Level 2 for reactive power;

[0061] b. Communication methods: carrier communication, RS485 communication, infrared communication;

[0062] 4. LED strip lights:

[0063] a. Power supply: 110VAC~230VAC;

[0064] b. Colors: Yellow, green, red, and blue (4 colors);

[0065] 5. Intelligent capacitor:

[0066] a. Rated voltage: AC220V / 380V, 50Hz;

[0067] b. Total capacity: 20kVar total replenishment, 10kVar distributed replenishment;

[0068] c. Capacitor switching interval: greater than 10 seconds;

[0069] 6. Converged Terminal:

[0070] a. Rated voltage: AC220V / 380V, 50Hz;

[0071] b. Rated current: 5A;

[0072] c. Measurement accuracy of current and voltage: 0.5 class;

[0073] d. Active and reactive power accuracy: Level 1;

[0074] e. Terminal unit power consumption: ≤25VA;

[0075] f. Local communication supports DL / T698.44, Modbus, DL / T 698.45, DL / T 645, and Q / GDW1376.2 protocols;

[0076] Switch: 12 10 / 100 / 1000M auto-sensing RJ45 ports, wide temperature range (-40℃~+85℃), natural cooling;

[0077] Training workstation: Used for installing and maintaining training software;

[0078] Power Distribution Internet of Things (IoT) Simulation Training Software: Used for power distribution IoT training;

[0079] Line simulation cabinet: Simulates low-voltage lines of different lengths for training on low-voltage line loss management;

[0080] Power supply load cabinet: 3 to 5 independent 3kW single-phase loads;

[0081] Photovoltaic simulation cabinet: 5kW residential single-phase photovoltaic system, used for training on energy coordination and management in the distribution area.

[0082] In some embodiments, the power distribution IoT monitoring and training system 6 includes a system principle training module, a converged terminal monitoring module, a training scenario management module, and an APP function display module. The system principle training module is used to train on the operating characteristics of the simulated primary system 3. The converged terminal monitoring module connects the converged terminal to the training workstation via a serial port or network port and displays the information collected by the converged terminal. The training scenario management module is used to distribute and manage training scenarios with one click. The APP function display module communicates with the fault simulation cabinet, the load simulation cabinet, and the photovoltaic simulation cabinet through the power distribution IoT simulation training software module to realize dedicated load supply, protection function verification, distributed energy collaborative optimization, power quality management, and reporting of power outage and restoration events.

[0083] For example, the system principle training module includes a basic training unit for power distribution IoT, a terminal equipment principle training unit, and a communication protocol training unit, to provide training on the system's operating characteristics. It provides comprehensive theoretical and practical training through the operating information of each device, local operation, remote operation, and its impact on power distribution IoT.

[0084] The converged terminal monitoring module is also used for the network setup of the distribution area. The converged terminal is connected to the training workstation via a network port or serial port. All the line and equipment information collected by the converged terminal is uploaded to the workstation and displayed in the monitoring system according to the principles of identity and selectivity, thereby realizing the monitoring function.

[0085] The training scenario management module manages training scenarios including power quality management scenarios, fault scenarios, and load scenarios. Specifically, these include short-circuit grounding fault scenario reproduction, input of distributed energy sources such as photovoltaics, distribution line operation simulation, and load switching. The distribution IoT simulation training software module enables one-click distribution and comprehensive management of training scenarios.

[0086] The APP function display module includes a topology identification unit, a line loss calculation unit, and a fault analysis unit to respectively realize topology identification, line loss calculation, and fault analysis. Specifically, the functions implemented by the APP function display module include dedicated load supply, protection function verification, distributed energy collaborative optimization, power quality management, and power outage / restoration event reporting. These functions are achieved through communication and coordination between the distribution IoT simulation training software and the fault simulation cabinet, load simulation cabinet, and photovoltaic simulation cabinet.

[0087] Working principle: A simple low-voltage power distribution simulation network is built by simulating the primary system 3, and the power supply system 2 provides power to simulate the operation of the real power distribution network. The communication system 4 provides communication between the simulation equipment, the integrated terminal and the monitoring and training system. The secondary control system 5 controls the process of simulating the primary system 3, and the power distribution Internet of Things monitoring and training system 6 provides a simulation training host to monitor and manage the integrated terminal. It can simulate a variety of real-world scenarios, which improves training efficiency.

[0088] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A highly efficient low-voltage power distribution IoT real-scene simulation training system, characterized in that, The system includes a simulation training system (1), which includes a power supply system (2), a simulated primary system (3), a communication system (4), a secondary control system (5), and a power distribution IoT monitoring and training system (6). The simulated primary system (3) is connected to the communication system (4). The secondary control system (5) and the power distribution IoT monitoring and training system (6) are both connected to the communication system (4) for information exchange. The simulated primary system (3) is used to simulate real low-voltage power distribution IoT primary operation scenarios. The secondary control system (5) is used to control the simulation process of the simulated primary system (3). The power distribution IoT monitoring and training system (6) is used to conduct system operation characteristic training and monitor the secondary control system (5). The power supply system (2) is electrically connected to the simulated primary system (3) for power supply. The secondary control system (5) includes a fusion terminal, a distribution IoT integrated cabinet, an isolation transformer cabinet, a fault simulation cabinet, a load simulation cabinet, a switch, a training workstation, a distribution IoT simulation training software module, a line simulation cabinet, an energy feeder load cabinet, and a photovoltaic simulation cabinet. The fusion terminal is used to collect analog quantity information of intelligent devices in the low-voltage distribution IoT and upload the analog quantity information to the distribution IoT monitoring and training system (6) through the communication system (4). The isolation transformer cabinet is used to provide electrical isolation for the low-voltage distribution IoT distribution area. The fault simulation cabinet is used to simulate low-voltage faults in the low-voltage distribution IoT. The load simulation cabinet and the energy feeder load cabinet are used to provide simulated loads for the simulated low-voltage distribution IoT. The photovoltaic simulation cabinet is used to simulate the output characteristics of photovoltaic distributed power sources in the simulated low-voltage distribution IoT to enrich the operation of the low-voltage distribution IoT. The scenario involves a line simulation cabinet used to simulate the operating characteristics of power distribution lines in a simulated low-voltage power distribution IoT under real-world operating conditions. The power distribution IoT simulation training software module receives analog quantity information uploaded by the fusion terminal and sends instructions to the fault simulation cabinet, load simulation cabinet, and photovoltaic simulation cabinet to control the fault settings of the fault simulation cabinet, set the active and reactive power of the load simulation cabinet and the energy feeder load cabinet, and adjust the output power of the photovoltaic simulation cabinet. The power distribution IoT integrated cabinet is electrically connected to the line simulation cabinet, load simulation cabinet, energy feeder load cabinet, photovoltaic simulation cabinet, and fusion terminal to complete the fault simulation function of the line. The switch, the training workstation, and the power distribution IoT simulation training software module form a host computer monitoring system, which communicates with the fusion terminal via serial port or network port to achieve information management. The power distribution IoT monitoring and training system (6) includes a system principle training module, a fusion terminal monitoring module, a training scenario management module, and an APP function display module. The system principle training module is used to train the operating characteristics of the simulated primary system (3). The fusion terminal monitoring module connects the fusion terminal to the training workstation through a serial port or network port and displays the information collected by the fusion terminal. The training scenario management module is used to distribute and manage training scenarios with one click. The APP function display module communicates with the fault simulation cabinet, the load simulation cabinet, and the photovoltaic simulation cabinet through the power distribution IoT simulation training software module to realize dedicated load supply, protection function verification, distributed energy collaborative optimization, power quality management, and reporting of power outage and restoration events. The system principle training module includes a basic training unit for power distribution Internet of Things, a training unit for terminal equipment principles, and a training unit for communication protocols.

2. The efficient low-voltage power distribution IoT real-scene simulation training system according to claim 1, characterized in that, The simulated primary system (3) includes a residual current circuit breaker, a capacitor bank, a smart meter, a smart miniature circuit breaker, a load simulation device, and a fault generation device. The residual current circuit breaker is connected in the simulated power distribution line to protect the residual current in the simulated power distribution line. The capacitor bank is connected in parallel at the system bus to perform reactive power compensation for the simulated primary system (3). The smart meter is connected in series in the simulated power distribution line to monitor the power consumption of the downstream lines in the simulated power distribution line. The load simulation device is connected in series at the end of the simulated power distribution line to simulate the active and reactive power output of the load in the simulated power distribution line. The fault generation device is connected in parallel in the simulated power distribution line to simulate real faults that occur in the field. The smart miniature circuit breaker is connected between the end of the simulated power distribution line and the upstream of the load simulation device to protect the simulated power distribution line.

3. The efficient low-voltage power distribution IoT real-scene simulation training system according to claim 1, characterized in that, The analog information includes voltage and current information. The low-voltage fault includes at least one of two-phase short circuit, three-phase short circuit, two-phase short circuit to ground, single-phase ground, leakage, overvoltage, and undervoltage. The analog load includes at least one of three-phase load, single-phase load, and rechargeable load.

4. The efficient low-voltage power distribution IoT real-scene simulation training system according to claim 1, characterized in that, The fusion terminal monitoring module is also used for the setup of the distribution radio area network.

5. The efficient low-voltage power distribution IoT real-scene simulation training system according to claim 1, characterized in that, The training scenarios managed by the training scenario management module include power quality management scenarios, fault scenarios, and load scenarios.

6. The efficient low-voltage power distribution IoT real-scene simulation training system according to claim 1, characterized in that, The APP's functional display module includes a topology identification unit, a line loss calculation unit, and a fault assessment unit.

Images