Power equipment control method based on Internet of Things

Abstract

The invention discloses a power equipment control method based on the Internet of Things, and relates to the technical field of the Internet of Things, which comprises the following steps of: forming a mesh topology structure by power equipment and various sensors, and connecting the power equipment with different communication protocols with an Internet of Things network through middleware, the power equipment is automatically controlled by using a preset control strategy and algorithm, and encryption is performed by using a symmetric encryption algorithm when data communication is performed, and the method has the advantages that the power equipment is connected with the Internet of Things, so that real-time state monitoring can be performed on the power equipment, including operation parameters of the equipment, operation parameters of the equipment and the like. According to the system, the equipment information can be remotely acquired through the Internet of Things platform, such as voltage, current, power, temperature and working state, no matter where the equipment is located, a manager can remotely acquire the equipment information through the Internet of Things platform and carry out remote control operation, such as remote start-stop and parameter adjustment, so that the workload and time cost of manual field inspection are reduced, and the timeliness and convenience of management are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of Internet of Things, and in particular to a power equipment control method based on Internet of Things. Background Art

[0002] With the continuous expansion of the scale of power systems and the increasing complexity of power equipment, the requirements for control accuracy, real-time and reliability are getting higher and higher. In the middle of the 20th century, the development of automatic control theory provided a theoretical basis for power equipment control. At the same time, the progress of electronic technology, sensor technology and computer technology made the application of automatic control in power systems possible. Initially, the application of automatic control in power equipment was mainly focused on some basic control functions. In terms of generator control, simple automatic voltage regulators (AVRs) and automatic speed regulators were used. AVRs automatically adjusted the excitation current to keep the voltage stable by detecting the output voltage of the generator; automatic speed regulators adjusted the speed of the prime mover (such as steam turbines or water turbines) according to the frequency and load changes of the generator to achieve automatic frequency control. In substations, relay-based relay protection devices began to appear, which could automatically cut off the faulty circuit when a fault occurred in the power system to protect the safety of equipment and personnel. In the process of controlling power equipment, the control accuracy of some control systems cannot meet the requirements, resulting in unstable operating parameters of the equipment and affecting the power supply quality of the power system. The control of power equipment needs to rely on a reliable communication system to transmit data and instructions, but in actual applications, the communication system may be subject to various interferences, resulting in data transmission interruption, bit errors and other problems, affecting the control effect of the equipment. For this reason, we propose a power equipment control method based on the Internet of Things. Summary of the invention

[0003] The purpose of the present invention is to provide a power equipment control method based on the Internet of Things.

[0004] In order to solve the problems raised in the above background technology, the present invention provides the following technical solutions: a power equipment control method based on the Internet of Things, including forming a mesh topology structure of power equipment and various sensors, connecting power equipment with different communication protocols to the Internet of Things network through middleware, using preset control strategies and algorithms to automatically control the power equipment, and using a symmetric encryption algorithm for encryption during data communication. The specific operation steps of the power equipment control method based on the Internet of Things are as follows: Step 1: Install sensors on the power equipment, and connect the sensors and power equipment to the Internet of Things network through wireless communication; Step 2: Use the middleware system to uniformly receive, process and distribute the protocol data of different power devices, so that different power devices can communicate and interact with each other; Step 3: Integrate the information of power equipment into the IoT platform, and users can remotely control the power equipment through the Internet; Step 4: Based on the preset control strategy and algorithm, the power equipment is automatically controlled, and distributed collaborative control is performed between different power equipment; Step 5: Use encryption technology to encrypt and decrypt communication data, set up firewalls at the network boundary, and filter and control the communication traffic in and out of the network; Step 6: Establish a security audit and monitoring mechanism to record and monitor the communication process.

[0005] As a further solution of the present invention: in the step one, a temperature sensor is installed on the heating part of the power equipment, and a current and voltage sensor is installed at the incoming line end and the main circuit node of the power equipment. The sensor and the power equipment are connected through wireless communication using ZigBee technology. ZigBee technology is based on the wireless communication protocol of the IEEE802.15.4 standard and uses the 2.4GHz global universal frequency band. The network is composed of a coordinator, a router and a terminal device as nodes. A ZigBee mesh topology is formed by all the nodes. All nodes can communicate with each other and have routing functions. Each node in the network is an intermediate node for data forwarding. The nodes are connected to each other through wireless signals. The nodes will actively search for other nodes around them and establish connection relationships.

[0006] As a further solution of the present invention: In the step 2, the middleware system provides a unified development and operation environment for the application program that is independent of the underlying hardware and operating system. It converts and adapts the communication protocol used by the power equipment, unifies the data format into a format that the application program can understand and process, and provides a unified device interface for the upper-level application. The standard interface provided by the middleware system enables users to operate and manage all power equipment in the mesh topology through the application program. The middleware system pre-processes the data collected from the power equipment, including cleaning the data to remove noise and abnormal values, summarizing and counting the data of all power equipment, and filtering out useful data according to application requirements, and passing key data to the upper-level application.

[0007] As a further solution of the present invention: in the step three, Alibaba Cloud is used as a public Internet of Things platform, a database is established in the Internet of Things platform, the information of the power equipment and the collected data are stored in the database, and an application is developed on the Internet of Things platform to provide users with an interface and function for remote control of the power equipment. The user sends a control instruction through the application on the Internet of Things platform, and the Internet of Things platform converts the control instruction into a digital signal and transmits it to the communication module of the power equipment through a wireless network. After receiving the control instruction, the communication module of the power equipment parses the instruction and transmits it to the control system of the device. The control system performs corresponding operations according to the instruction, authenticates and authorizes the user, and ensures that only authorized users access and control the power equipment.

[0008] As a further solution of the present invention: in the step four, a threshold-based control strategy is used, and the threshold is set according to the operating parameters of the power equipment. The power equipment collects operating data in real time through installed sensors, and the data is transmitted to a remote monitoring center. The monitoring center receives the collected data and analyzes and calculates it according to a preset control strategy. When the monitored parameter value reaches the preset threshold, the control system will automatically generate a control instruction and send it to the actuator of the power equipment. The actuator changes the operating state of the power equipment according to the instruction, and triggers an alarm signal and issues a warning message on the monitoring interface. The operating parameters of the power equipment are controlled using an optimized control strategy. The power equipment has its own performance limitations. The operating voltage of the electrical equipment is within ±10% of the rated voltage. During the optimized control process, the control instruction is within the performance limit of the power equipment.

[0009] As a further solution of the present invention: In step 4, a PID control algorithm is used to perform feedback control on the power equipment, and the overall expression of the PID control algorithm is: , in, Represents the output control quantity of the PID controller, Represents the output control amount of the proportional link, Represents the output control quantity of the integral link, represents the output control quantity of the differential link, represents the proportionality coefficient, represents the integral coefficient, represents the differential coefficient, Represents the deviation between the set value and the actual measured value. The sensor measures the actual operating parameters of the power equipment, including temperature, pressure and flow, and compares them with the set value to obtain the deviation. Then, the PID controller calculates the control quantity according to the above expression and sends the control quantity to the actuator. The actuator adjusts the operating state of the equipment according to the control quantity. This process is repeated until the controlled quantity reaches the set value. The output control quantity of the PID controller acts on the actuator of the power equipment to change the operating state of the power equipment.

[0010] As a further solution of the present invention: in the step five, a symmetric encryption algorithm is used to encrypt the communication data, and the communicating parties generate an identical key in a secure environment. The sender obtains the operating parameters of the power equipment to be sent, and then uses the symmetric encryption algorithm and the shared key to encrypt the data. The sender sends the encrypted ciphertext to the receiver through the communication channel. After receiving the ciphertext, the receiver uses the same symmetric encryption algorithm and the shared key to decrypt it. The decryption process is the inverse operation of the encryption process, and the ciphertext is restored to the original plaintext communication data.

[0011] As a further solution of the present invention: in the step five, a firewall is set at the network boundary to filter and control the communication traffic in and out of the network. The firewall prevents illegal access and attacks according to preset rules to protect the security of the internal network. The intrusion detection system (IDS) monitors the communication traffic in the network in real time, detects potential intrusion behaviors, and issues alarms in time. When an intrusion behavior is detected, the intrusion prevention system (IPS) can take proactive measures to defend and prevent the occurrence of intrusion. The IDS / IPS system is deployed to detect and prevent network attacks in time to protect the security of communications.

[0012] As a further solution of the present invention: in the step six, a data packet capture device is deployed at the network node, which can capture all communication data packets flowing through the node, and the data packet includes the source address, destination address, port number and protocol type. For user operations involving power equipment control, the data packet capture device records the operations of the local console and the remote Internet of Things platform in detail, including the identity information of the operating user, operation time, operation content and operation results, establishes an audit database to store the collected audit data, and regularly backs up the audit database. Through long-term status monitoring of the equipment, maintenance and maintenance plans are reasonably arranged according to the actual operating conditions of the equipment.

[0013] By adopting the above technical solution, compared with the prior art, the beneficial effects of the present invention are: The present invention connects power equipment with the Internet of Things, and can monitor the status of power equipment in real time, including the operating parameters of the equipment, including voltage, current, power, temperature and working status, etc. No matter where the equipment is, the management personnel can remotely obtain the equipment information through the Internet of Things platform, and perform remote control operations, such as remote start and stop, parameter adjustment, etc., which reduces the workload and time cost of manual on-site inspections, and improves the timeliness and convenience of management. The Internet of Things technology can monitor and record the operation process of the equipment to ensure that the operator operates in accordance with the prescribed procedures and standards. At the same time, through technical means such as identity authentication and authority management, it can prevent unauthorized personnel from operating the equipment, thereby improving the safety and reliability of equipment operation; The present invention can timely discover abnormal conditions of equipment and issue early warning signals through real-time analysis of equipment operation data. At the same time, combined with big data analysis and artificial intelligence technology, it can accurately diagnose equipment failures and predict the development trend of failures, providing a scientific basis for equipment maintenance and repair, and helping to take measures in advance to avoid equipment failures and reduce equipment downtime and repair costs. In power equipment communications, communication channels are subject to various interferences and security threats, such as electromagnetic interference and network attacks. The confidentiality of ciphertext can resist the risk of information leakage to a certain extent.

[0014] The present invention can optimize the configuration of electric energy according to the real-time operating data of the electric equipment and the changes in the power demand. During the peak period of electricity consumption, the operating parameters of the equipment can be reasonably adjusted to improve the operating efficiency of the equipment and meet the power demand; during the low period of electricity consumption, some equipment can be appropriately shut down or operated at reduced power to reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the steps of the power equipment control method based on the Internet of Things in an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0017] The power equipment control method based on the Internet of Things of the present invention comprises forming a mesh topology structure of power equipment and various sensors, connecting power equipment with different communication protocols to the Internet of Things network through middleware, using a preset control strategy and algorithm to automatically control the power equipment, and using a symmetric encryption algorithm to encrypt data during data communication. The specific operation steps of the power equipment control method based on the Internet of Things are as follows: Step 1: Install sensors on the power equipment, and connect the sensors and power equipment to the Internet of Things network through wireless communication; Step 2: Use the middleware system to uniformly receive, process and distribute the protocol data of different power devices, so that different power devices can communicate and interact with each other; Step 3: Integrate the information of power equipment into the IoT platform, and users can remotely control the power equipment through the Internet; Step 4: Based on the preset control strategy and algorithm, the power equipment is automatically controlled, and distributed collaborative control is performed between different power equipment; Step 5: Use encryption technology to encrypt and decrypt communication data, set up firewalls at the network boundary, and filter and control the communication traffic in and out of the network; Step 6: Establish a security audit and monitoring mechanism to record and monitor the communication process.

[0018] In one embodiment of the present invention: In step one, a temperature sensor is installed on the heating part of the power equipment, and current and voltage sensors are installed at the incoming line end and the main circuit nodes of the power equipment. The sensor and the power equipment are connected through wireless communication using ZigBee technology. ZigBee technology is based on the wireless communication protocol of the IEEE802.15.4 standard and uses the 2.4GHz global universal frequency band. The network is composed of a coordinator, a router and a terminal device as nodes. The ZigBee mesh topology is formed by all the nodes. All nodes can communicate with each other and have routing functions. Each node in the network is an intermediate node for data forwarding. The nodes are connected to each other through wireless signals. The nodes will actively search for other nodes around them and establish connection relationships.

[0019] In one embodiment of the present invention: In step 2, the middleware system provides a unified development and operation environment for the application program that is independent of the underlying hardware and operating system. It converts and adapts the communication protocol used by the power equipment, unifies the data format into a format that the application program can understand and process, and provides a unified device interface for the upper-level application. The standard interface provided by the middleware system enables users to operate and manage all power equipment in the mesh topology through the application program. The middleware system pre-processes the data collected from the power equipment, including cleaning the data to remove noise and abnormal values, summarizing and counting the data of all power equipment, and filtering out useful data according to application requirements, and passing key data to the upper-level application.

[0020] In one embodiment of the present invention: In step three, Alibaba Cloud is used as a public Internet of Things platform, a database is established in the Internet of Things platform, the information of the power equipment and the collected data are stored in the database, an application is developed on the Internet of Things platform, and an interface and function for remote control of the power equipment are provided to the user. The user sends a control instruction through the application on the Internet of Things platform, and the Internet of Things platform converts the control instruction into a digital signal and transmits it to the communication module of the power equipment through a wireless network. After receiving the control instruction, the communication module of the power equipment parses the instruction and transmits it to the control system of the device. The control system performs corresponding operations according to the instruction, authenticates and authorizes the user, and ensures that only authorized users access and control the power equipment.

[0021] In one embodiment of the present invention: In step four, a threshold-based control strategy is used, and a threshold is set according to the operating parameters of the power equipment. The power equipment collects operating data in real time through installed sensors, and the data is transmitted to a remote monitoring center. The monitoring center receives the collected data and analyzes and calculates it according to a preset control strategy. When the monitored parameter value reaches the preset threshold, the control system will automatically generate a control instruction and send it to the actuator of the power equipment. The actuator changes the operating state of the power equipment according to the instruction, and triggers an alarm signal and issues a warning message on the monitoring interface. The operating parameters of the power equipment are controlled using an optimized control strategy. The power equipment has its own performance limitations. The operating voltage of the electrical equipment is within ±10% of the rated voltage. During the optimized control process, the control instruction is within the performance limit of the power equipment.

[0022] In one embodiment of the present invention: In step 4, a PID control algorithm is used to perform feedback control on the power equipment, and the overall expression of the PID control algorithm is: , in, Represents the output control quantity of the PID controller, Represents the output control amount of the proportional link, Represents the output control quantity of the integral link, represents the output control quantity of the differential link, represents the proportionality coefficient, represents the integral coefficient, represents the differential coefficient, Represents the deviation between the set value and the actual measured value. The sensor measures the actual operating parameters of the power equipment, including temperature, pressure and flow, and compares them with the set value to obtain the deviation. Then, the PID controller calculates the control quantity according to the above expression and sends the control quantity to the actuator. The actuator adjusts the operating state of the equipment according to the control quantity. This process is repeated until the controlled quantity reaches the set value. The output control quantity of the PID controller acts on the actuator of the power equipment to change the operating state of the power equipment.

[0023] In one embodiment of the present invention: in step five, a symmetric encryption algorithm is used to encrypt communication data, and the communicating parties generate an identical key in a secure environment. The sender obtains the operating parameters of the power equipment to be sent, and then uses the symmetric encryption algorithm and the shared key to encrypt the data. The sender sends the encrypted ciphertext to the receiver through the communication channel. After receiving the ciphertext, the receiver uses the same symmetric encryption algorithm and the shared key to decrypt it. The decryption process is the inverse operation of the encryption process, and the ciphertext is restored to the original plaintext communication data.

[0024] In one embodiment of the present invention: In step five, a firewall is set at the network boundary to filter and control the communication traffic in and out of the network. The firewall prevents illegal access and attacks according to preset rules to protect the security of the internal network. The intrusion detection system (IDS) monitors the communication traffic in the network in real time, detects potential intrusions, and issues alarms in time. When an intrusion is detected, the intrusion prevention system (IPS) can take proactive measures to defend and prevent the occurrence of intrusions. The IDS / IPS system is deployed to detect and prevent network attacks in time to protect the security of communications.

[0025] In one embodiment of the present invention: In step six, a data packet capture device is deployed at a network node, which can capture all communication data packets flowing through the node, including the source address, destination address, port number and protocol type. For user operations involving power equipment control, the data packet capture device records the operations of the local console and the remote Internet of Things platform in detail, including the identity information of the operating user, operation time, operation content and operation results, establishes an audit database to store the collected audit data, and regularly backs up the audit database. Through long-term status monitoring of the equipment, maintenance and maintenance plans are reasonably arranged according to the actual operating conditions of the equipment.

[0026] Embodiment 1: For detecting the temperature of power equipment, a thermocouple sensor can be selected to directly monitor the temperature change of the equipment. For monitoring the current and voltage of the power equipment, a current transformer and a voltage transformer are used to obtain the operating current and voltage data of the power equipment. These sensors can convert physical quantities into electrical signals for subsequent transmission and processing. In a mesh topology ZigBee network, when a node needs to send data to another node, it will select an optimal communication path according to the routing table. The routing table is established by continuously exchanging routing information between nodes in the network. The routing table is not static. It will be dynamically updated according to factors such as changes in the network topology, the addition or departure of devices, and changes in link status. A reasonable routing table can optimize the data transmission path and reduce transmission delays and network congestion.

[0027] Embodiment 2: Through the middleware system, users can monitor and manage various power equipment on a unified platform. Users can view the real-time operating status and historical data of the equipment through the upper-level application, and perform remote control operations. The middleware system serves as a bridge connecting different devices and systems, and can continuously expand its protocol compatibility. New communication protocols continue to emerge, and at the same time, old protocols are also in continuous use. The middleware system can ensure seamless access to new and old communication protocols, smooth data interaction, and overall system integration.

[0028] Embodiment 3: Establish a database in the Internet of Things platform, store the information of the power equipment and the collected data in the database, assign a unique identity, device serial number and MAC address to each power equipment, so that each device can be accurately identified and managed in the Internet of Things platform. Users can log in to the Internet of Things platform through a browser or mobile phone APP to remotely control the power equipment. When the user logs in, the user name and password, digital certificate and fingerprint recognition authentication method are used. According to the user's role and authority, the corresponding operation authority is assigned to the user. After the device completes the operation, the execution result is fed back to the Internet of Things platform so that the user can understand the status of the device in a timely manner.

[0029] Example 4: In an electric heating system, the target temperature is 80°C, the current actual temperature is 70°C, and the deviation is 10°C. =2, then the control quantity output by the proportional link =2×10=20. This control quantity will prompt the heating equipment to increase power to reduce the temperature deviation. Because of the heat dissipation of the environment, the proportional link alone cannot stabilize the temperature at 80°C. There is a stable temperature deviation. The integral link will gradually accumulate this deviation and adjust the control quantity continuously until the temperature deviation is zero and reaches a steady state. The differential link takes into account the rate of change of the deviation. It calculates the derivative of the deviation and predicts the changing trend of the deviation, thereby controlling in advance, which helps to improve the dynamic response performance of the system and reduce overshoot.

[0030] As attached Figure 1 As shown, ZigBee technology is used to form a mesh topology between power equipment and various sensors, so that various power equipment can be interconnected. A middleware system is used to convert the data formats of power equipment with multiple communication protocols into a unified format, and preset control strategies and algorithms are used to achieve automatic control of power equipment.

[0031] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

[0032] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] The above contents are merely examples and explanations of the present invention. Various modifications or additions to the specific embodiments described or replacements in similar ways by technicians in the technical field shall fall within the protection scope of the present invention as long as they do not deviate from the invention or exceed the scope defined by the claims.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power equipment control method based on the Internet of Things, comprising forming a mesh topology structure of power equipment and various sensors, connecting power equipment with different communication protocols to the Internet of Things network through middleware, using a preset control strategy and algorithm to automatically control the power equipment, and using a symmetric encryption algorithm for encryption during data communication, characterized in that: The specific operation steps of the power equipment control method based on the Internet of Things are as follows: Step 1: Install sensors on the power equipment, and connect the sensors and power equipment to the Internet of Things network through wireless communication; Step 2: Use the middleware system to uniformly receive, process and distribute the protocol data of different power devices, so that different power devices can communicate and interact with each other; Step 3: Integrate the information of power equipment into the IoT platform, and users can remotely control the power equipment through the Internet; Step 4: Based on the preset control strategy and algorithm, the power equipment is automatically controlled, and distributed collaborative control is performed between different power equipment; Step 5: Use encryption technology to encrypt and decrypt communication data, set up firewalls at the network boundary, and filter and control the communication traffic in and out of the network; Step 6: Establish a security audit and monitoring mechanism to record and monitor the communication process.

2. The power equipment control method based on the Internet of Things according to claim 1 is characterized in that: In the step 1, a temperature sensor is installed on the heating part of the power equipment, and a current and voltage sensor is installed at the incoming line end and the main circuit node of the power equipment. The sensor and the power equipment are connected through wireless communication using ZigBee technology. ZigBee technology is based on the wireless communication protocol of the IEEE802.15.4 standard and uses the 2.4GHz global universal frequency band. The network is composed of a coordinator, a router and a terminal device as nodes. All nodes form a ZigBee mesh topology structure. All nodes can communicate with each other and have routing functions. Each node in the network is an intermediate node for data forwarding. The nodes are connected to each other through wireless signals. The nodes will actively search for other nodes around them and establish connection relationships.

3. The power equipment control method based on the Internet of Things according to claim 1 is characterized in that: In the step 2, the middleware system provides a unified development and operation environment for the application program that is independent of the underlying hardware and operating system. It converts and adapts the communication protocol used by the power equipment, unifies the data format into a format that the application program can understand and process, and provides a unified device interface for the upper-level application. The standard interface provided by the middleware system enables users to operate and manage all power equipment in the mesh topology through the application program. The middleware system pre-processes the data collected from the power equipment, including cleaning the data to remove noise and outliers, summarizing and counting the data of all power equipment, and filtering out useful data according to application requirements, and passing key data to the upper-level application.

4. The power equipment control method based on the Internet of Things according to claim 1 is characterized in that: In the step three, Alibaba Cloud is used as a public IoT platform, a database is established in the IoT platform, the information of the power equipment and the collected data are stored in the database, an application is developed on the IoT platform, and an interface and function for remotely controlling the power equipment are provided to users. The user sends a control instruction through the application on the IoT platform, and the IoT platform converts the control instruction into a digital signal and transmits it to the communication module of the power equipment through a wireless network. After receiving the control instruction, the communication module of the power equipment parses the instruction and transmits it to the control system of the device. The control system performs corresponding operations according to the instruction, authenticates and authorizes the user, and ensures that only authorized users access and control the power equipment.

5. The power equipment control method based on the Internet of Things according to claim 1 is characterized in that: In the step four, a threshold-based control strategy is used to set a threshold value according to the operating parameters of the power equipment. The power equipment collects operating data in real time through installed sensors, and the data is transmitted to a remote monitoring center. The monitoring center receives the collected data and analyzes and calculates it according to a preset control strategy. When the monitored parameter value reaches the preset threshold, the control system will automatically generate a control instruction and send it to the actuator of the power equipment. The actuator changes the operating state of the power equipment according to the instruction, and triggers an alarm signal and issues a warning message on the monitoring interface. The operating parameters of the power equipment are controlled using an optimized control strategy. The power equipment has its own performance limitations. The operating voltage of the electrical equipment is within ±10% of the rated voltage. During the optimized control process, the control instruction is within the performance limit of the power equipment.

6. The power equipment control method based on the Internet of Things according to claim 1, characterized in that: In step 4, a PID control algorithm is used to perform feedback control on the power equipment. The overall expression of the PID control algorithm is: ， in, Represents the output control quantity of the PID controller, Represents the output control amount of the proportional link, Represents the output control quantity of the integral link, represents the output control quantity of the differential link, represents the proportionality coefficient, represents the integral coefficient, represents the differential coefficient, error Represents the deviation between the set value and the actual measured value. The sensor measures the actual operating parameters of the power equipment, including temperature, pressure and flow, and compares them with the set value to obtain the deviation. Then, the PID controller calculates the control quantity according to the above expression and sends the control quantity to the actuator. The actuator adjusts the operating state of the equipment according to the control quantity. This process is repeated until the controlled quantity reaches the set value. The output control quantity of the PID controller acts on the actuator of the power equipment to change the operating state of the power equipment.

7. The power equipment control method based on the Internet of Things according to claim 1 is characterized in that: In step five, a symmetric encryption algorithm is used to encrypt communication data. The communicating parties generate an identical key in a secure environment. The sender obtains the operating parameters of the power equipment to be sent, and then uses the symmetric encryption algorithm and the shared key to encrypt the data. The sender sends the encrypted ciphertext to the receiver through the communication channel. After receiving the ciphertext, the receiver uses the same symmetric encryption algorithm and the shared key to decrypt it. The decryption process is the inverse operation of the encryption process, and the ciphertext is restored to the original plaintext communication data.

8. The power equipment control method based on the Internet of Things according to claim 1, characterized in that: In step five, a firewall is set at the network boundary to filter and control the communication traffic in and out of the network. The firewall prevents illegal access and attacks according to preset rules to protect the security of the internal network. The intrusion detection system (IDS) monitors the communication traffic in the network in real time, detects potential intrusions, and issues alarms in time. When an intrusion is detected, the intrusion prevention system (IPS) can take proactive measures to prevent the occurrence of intrusions. The IDS / IPS system is deployed to detect and prevent network attacks in time to protect the security of communications.

9. The power equipment control method based on the Internet of Things according to claim 1, characterized in that: In step six, a data packet capture device is deployed at the network node to capture all communication data packets flowing through the node. The data packet includes the source address, destination address, port number and protocol type. For user operations involving power equipment control, the data packet capture device records the operations of the local console and the remote Internet of Things platform in detail, including the identity information of the operating user, operation time, operation content and operation results, establishes an audit database to store the collected audit data, and regularly backs up the audit database. Through long-term status monitoring of the equipment, a maintenance and maintenance plan is reasonably arranged according to the actual operating conditions of the equipment.

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