CN116055322B

CN116055322B - A multi-device collaborative working method

Info

Publication number: CN116055322B
Application number: CN202211341088.4A
Authority: CN
Inventors: 沈雨生; 荀思超; 徐荣; 刘晓玥; 魏林风
Original assignee: Yancheng Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
Current assignee: Yancheng Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
Priority date: 2022-10-30
Filing date: 2022-10-30
Publication date: 2024-07-19
Anticipated expiration: 2042-10-30
Also published as: CN116055322A

Abstract

The present invention provides a method for collaborative work of multiple devices. The method for collaborative work of multiple devices includes: a terminal device with functional resources can be designed to work in different working states and collaborative functions corresponding to the working states according to the requirements of an industrial control system. The device is connected to a communication network including multiple access points to form a collaborative work network. The device can calculate and select the optimal working state according to the system parameters collected by the current acquisition port, especially the parameters reflecting the change of the control system state, in each set control cycle, and then change the working state. The present invention can reduce the vulnerability of a control system for collaborative work of multiple devices.

Description

Multi-equipment cooperative working method

Technical Field

The invention belongs to the technical field of communication, and particularly relates to a multi-equipment cooperative working method.

Background

A plurality of terminal devices included in the industrial control system can form a cooperative network through a communication network including a plurality of access points, and after the cooperative network is formed, a plurality of devices in the cooperative network can cooperatively complete the cooperative task of the control system.

Current cooperative networks generally include one or more superordinate computers and a plurality of slave devices. The upper computers form a core network through reliable links, and the slave devices are connected to the respective upper computers according to the communication topological relation. The upper computer has management authority of the cooperative network and is used for controlling the slave devices to execute cooperative tasks together. The slave device executes the cooperative task according to the control information of the upper computer, and the work abnormality of the upper computer can enable the cooperative work of the parts to be in a paralysis state.

The running state of a further industrial control system is often converted along with the working progress of the industrial control system, and the communication topological structure of the cooperative network also needs to follow the conversion during the state conversion to adapt to the current running state requirement. Specifically, if the control system is switched from the normal working state to the emergency working state, the slave devices of the control system in the space or time dimension are in an abnormal active state, and the cooperative network needs to supply enough resources (including computing resources, communication bandwidth, communication delay and the like) to meet the requirement of the control system, otherwise, the operation efficiency of the industrial control system is extremely deteriorated, and even the system breakdown is caused. The network built by the existing multi-equipment cooperative working method cannot meet the requirements, and is difficult to adapt to the development of a modern industrial control system.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a multi-device cooperative work method for reducing the vulnerability of a multi-device cooperative work control system.

The invention particularly relates to a multi-equipment cooperative working method, which comprises the following steps: a plurality of terminal devices having functional resources and a communication network including a plurality of access points through which the plurality of terminal devices access the communication network to construct a multi-device cooperative control system.

The communication network comprising a plurality of access points has dynamic resource allocation capability, which means that the communication channels with required bandwidth and time delay can be dynamically allocated according to the requirements of access equipment.

The terminal equipment functional resource comprises at least one of a central processing unit resource of equipment, a memory resource of equipment, a communication resource of equipment, an information acquisition port resource of equipment and a control port resource of equipment.

The functional resources of the terminal equipment are determined during equipment manufacture and are stored in the equipment in a configuration information mode.

The preferred communication resources of the above device include communication bandwidth and communication latency parameters that match the communication network access point.

The equipment can be designed to work in different working states according to the requirements of an industrial control system, and the cooperative functions corresponding to the working states are designed.

The terminal equipment is preferably classified according to equipment capacity and industrial control system definition and is marked in configuration information, so that equipment identification, classification management and function candidates are facilitated.

The configuration information further includes at least one of parameters of communication when the device is operated in each working state, input and output settings, a processing program for input information, a processing program for output information, an acquisition port processing program, and a processing program for a control port.

The configuration information also comprises a working state transition decision module.

The function of the working state transition decision module comprises the following steps: the method can calculate and select the optimal working state according to the system parameters acquired by the current acquisition port, particularly the parameters showing the change of the state of the control system, in each set control period, and then change the working state.

The input information representing the change of the state of the control system preferably includes: system parameters acquired by the current acquisition port, current equipment communication parameters and current communication key resource indexes.

The invention has the beneficial effects that: the invention combines the working state conversion strategy of the equipment with the communication gateway key resource index, and can reduce the vulnerability of the multi-equipment cooperative work control system, thereby having practical application prospect.

Drawings

FIG. 1 is a schematic diagram of a multi-device cooperative work control system according to an embodiment of the present invention;

FIG. 2 is a schematic block diagram of the apparatus components of an embodiment of the present invention;

fig. 3 is a flow chart of a method for cooperative work of multiple devices according to an embodiment of the present invention.

Detailed Description

A detailed description of a multi-device cooperative method according to the present invention will be provided below with reference to the accompanying drawings.

As shown in fig. 1, a plurality of mining control terminal devices with 5G access capability in the power sensor network form a cooperative network together through accessing the 5G network. Three kinds of application scenes of the 5G network, namely the characteristics of enhanced mobile broadband, ultra-high reliability low-time-delay communication and mass machine communication, are new generation broadband mobile communication technology, and are becoming network infrastructure for realizing object interconnection by combining technologies such as vertical slicing, cloud computing and the like. And the air interface of 5G can dynamically allocate the links according to the terminal requirements. And after successful networking, collecting the geographical information, network structure, equipment information, real-time data and the like of the power grid. The running state of the system is judged through data so as to complete power grid running automation (real-time monitoring, automatic fault isolation, recovery and the like) and power grid management automation (equipment management, power failure management and the like), and each equipment in the cooperative work network can cooperatively complete the functions of measuring, controlling and the like of the power grid and keeping the power grid to run efficiently, green and energy-saving.

The device in this embodiment may be an electric power internet of things terminal, an electric power communication terminal, an electric power monitoring terminal, a video telemetry monitoring terminal, an electric power acquisition terminal, a power distribution terminal, a programmable controller, a temporary access intelligent device, or the like, which has 5G access capability. As shown in fig. 2, these terminal devices have certain functional resources, including central processor resources of the devices, memory resources of the devices, communication resources of the devices, information acquisition port resources of the devices, control port resources of the devices, and the like, and are determined and described in a configuration file manner at the time of design and manufacture.

The communication resources of the device in this embodiment are determined by the upper limit of the design configuration of the device, and the communication resource requirements in the functional state are determined by the design. Aiming at the networked power distribution side protection control communication network performance research, the transmission delay of a message is used as a real-time evaluation index, and the packet loss rate of the message is used as a reliability evaluation index. From the standpoint of the rapidity and reliability of the protection control function, the communication resource of the 5G network in the cooperative work network should be lower than 5ms, which is required to meet the requirement of the protection control communication performance of the networked power distribution side, and the packet loss rate should be lower than 10 to the power of-3.

Fig. 3 is a flow chart of a multi-device cooperative working method according to an embodiment of the present invention. The method shown in fig. 3 specifically includes steps 201 to 203, where step 201 describes a design process of a collaborative network, step 202 describes a networking process, and step 203 mainly describes a mechanism that the ledger system network has low vulnerability.

201, The working state of the equipment is designed according to the requirements of an industrial control system.

Object-oriented hierarchical modeling techniques and cloud computing techniques are preferably employed. With a data model based on a client/server architecture, system functionality is defined as having a plurality of logical devices, the logical devices comprising a plurality of logical nodes, the logical nodes comprising data objects. These logical devices cooperate to perform a certain function of the system through the processing interactions of the logical data objects. Logical devices exist on top of the co-operating network and demands are made on device resources for implementing the logical devices. And then can be distributed to the physical devices of the physical cooperative network according to the requirement and the condition by utilizing the cloud computing technology.

The terminal devices may preferably be classified by their device capabilities, industrial control system definitions and identified in configuration information to facilitate device identification classification management and function candidates. And simultaneously, parameters comprising communication when the equipment operates in each working state are configured, and input and output settings, processing programs for input information, processing programs for output information, processing programs for acquisition ports, processing programs for control ports and the like are configured.

Preferably, the system is designed to work in different working states according to the requirements of the power industry control system and the conditions of equipment resources, and the cooperative functions corresponding to the working states are designed. The equipment comprises a working state transfer decision module which is used for carrying out optimal switching among different cooperative working states.

202 Access by a device through a communication network comprising a plurality of access points to build up a co-operating network.

After the power terminal equipment is installed in place, initializing to a set working state through configuration file setting, accessing a 5G network, and sending configuration information of the equipment to associated equipment of the cooperative network according to set requirements.

In one implementation, each device obtains cooperative network configuration information after network access, and the network access device sends the device configuration information to the device implementing the networking logic function.

203, Switching the working state to optimize the cooperative working network.

The power network operating state varies with load conditions, planned events, unexpected events, etc. The device can calculate according to the system parameters acquired by the current acquisition port, particularly the parameters showing the change of the state of the control system, in each set control period, and select the optimal working state under the control of the working state transition decision module.

In one implementation, the current communication critical resource index is the current cooperative network demand for low delay links.

Preferably, the above-mentioned working state transition decision-making module adopts a Markov decision algorithm.

Further, the markov decision algorithm includes the following steps:

S1: combining the state space of the Markov decision process according to the system running state conversion relation, the vulnerability index corresponding to the running state, the current communication key resource index and the input information, and calculating to obtain a state transition probability matrix; defining an action space of a Markov decision process;

S2: the reward function of the Markov decision process is defined as a vulnerability index function corresponding to the current system running state;

s3: determining an objective function according to the system running state conversion relation and the vulnerability index corresponding to the running state;

S4: solving the Markov decision process model to obtain the working state transition decision strategy of the equipment.

Preferably, in the step S2, the vulnerability index function corresponding to the current system running state is an intermediate centrality index of the device collaboration network.

Finally, it should be noted that the above-mentioned embodiments are merely illustrative of the technical solution of the invention and not limiting thereof. It will be understood by those skilled in the art that modifications and equivalents may be made to the particular embodiments of the invention, which are within the scope of the claims appended hereto.

Claims

1. A multi-device collaborative working method, characterized by comprising:

A plurality of terminal devices with functional resources and a communication network including a plurality of access points, wherein the plurality of terminal devices access the communication network through the access points to form a multi-device collaborative work control system;

The terminal device can be designed to work in different working states and the collaborative functions corresponding to the working states according to the requirements of the industrial control system;

The terminal device includes a working state transfer decision module;

The working state transfer decision module functions include: being able to calculate and select the optimal working state according to the parameters reflecting the change of the control system state collected by the current collection port in each set control cycle, and then changing the working state;

The communication network including multiple access points has dynamic resource allocation capability and can dynamically allocate communication channels with required bandwidth and delay according to the requirements of access devices;

The working state transfer decision module adopts a Markov decision algorithm, including the following steps:

S1: According to the system operation state conversion relationship, the vulnerability index corresponding to the operation state, the current communication key resource index, and the input information, the state space of the Markov decision process is combined, and the state transition probability matrix is calculated; and the action space of the Markov decision process is defined;

S2: The reward function of the Markov decision process is defined as the vulnerability index function corresponding to the current system operation state; the vulnerability index function corresponding to the current system operation state is the betweenness centrality index of the device collaborative network;

S3: Determine the objective function according to the system operation state conversion relationship and the vulnerability index corresponding to the operation state according to the system operation state conversion;

S4: Solve the above Markov decision process model to obtain the working state transfer decision strategy of the equipment.

2. A method for multi-device collaborative work according to claim 1, characterized in that the terminal device with functional resources also includes at least one of a central processing unit resource of the device, a memory resource of the device, a communication resource of the device, an information collection port resource of the device, and a control port resource of the device, which is determined when the device is manufactured and stored in the device in the form of configuration information;

The communication resources of the device include communication bandwidth and communication delay parameters that match the communication network access point;

The configuration information also includes at least one of the communication parameters, input and output settings, input information processing program, output information processing program, acquisition port processing program, and control port processing program when the device is running in various working states.