A bus control system and method for ecms and dcs network multiplexing

Abstract

The application discloses a bus control system and method for ECMS and DCS network multiplexing, which comprises a unit generator set ECMS subsystem and a unit generator set DCS subsystem, and ECMS-HMI host computers and DCS-HMI host computers are respectively connected with lower computers through a multiplexed station control layer communication network; the ECMS-HMI host computers can monitor electrical protection device related equipment, low-voltage plant power intelligent measurement and control device related equipment, and monitor process related equipment; the DCS-HMI host computers can monitor electrical protection device related equipment and low-voltage plant power intelligent measurement and control device related equipment, and monitor process related equipment. The host computers are respectively deployed, the station control layer communication network is multiplexed, lower computer data is fused with each other, the ECMS-HMI host computers and the DCS-HMI host computers directly collect and directly send their respective monitoring data, intermediate transmission links are reduced, and reliability is improved.

Description

Technical Field

[0001] This invention relates to a bus control system and method for multiplexing ECMS and DCS networks, belonging to the field of bus control system technology. Background Technology

[0002] In the application of automatic control systems in thermal power plants, the monitoring of equipment related to electrical power switches is implemented in ECMS (Electrical Control and Management System in Power Plants), while the monitoring of equipment related to boiler and turbine processes is implemented in DCS (Distributed Control System). However, ECMS needs to monitor the status of motor-type equipment, and DCS needs to monitor the status of electrical power switch-type equipment. Since ECMS and DCS collect data independently, there is a situation of duplicate data collection for motor-type equipment and electrical power switch-type equipment.

[0003] The invention patent (patent number: ZL201210007231.6) discloses an integrated thermal and electrical control system for power plants, including unit generators, substations, and an integrated thermal and electrical monitoring master station. This invention's network architecture only classifies substation automation as a common system; however, thermal automation and plant power automation also have portions that are common systems. Furthermore, it does not specify whether the network architecture of the integrated thermal and electrical monitoring master station is a server / client (C / S) structure or a distributed parallel structure. The fieldbus master card functions as a protocol converter. Line protection devices and high-voltage measurement and control protection devices are transmitted to the integrated thermal and electrical monitoring master station via Ethernet through the fieldbus master card, without direct data acquisition and transmission, increasing intermediate transmission links and reducing reliability. 380V measurement and control protection (motor-related) closely related to the process is not assigned to the same pair of controllers as the controller (DPU), and without direct data acquisition and transmission, increasing intermediate transmission links and reducing reliability.

[0004] Reference (Zhang Wenjian, Zhang Yongxia, Wang Zhaohui, et al. Integrated monitoring of ECMS and DCS in thermal power plants [J]. Thermal Power Generation, 2018, 47(12): 106-110) adopted the DCS platform to realize ECMS monitoring. The network architecture adopted a distributed parallel structure. The control protocol converter is both a protocol conversion device and a controller, which is strongly coupled and concentrates risks. For the integrated protection of high-voltage electrical power switches, the data is not directly transmitted to the HMI host computer via Ethernet communication. It needs to go through the control protocol converter. The data is not directly collected and transmitted, which increases the intermediate transmission link and reduces reliability.

[0005] The information disclosed in this background section is intended only to enhance understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a bus control system and method for multiplexing ECMS and DCS networks. First, the networking of the unit ECMS subsystem and the unit DCS subsystem is improved, with each upper computer deployed independently, the station control layer communication network multiplexed, and the lower computer data integrated. Second, the unit ECMS subsystem and the unit DCS subsystem directly collect and transmit their respective monitoring data, reducing intermediate transmission links and improving reliability.

[0007] To achieve the above objectives, the present invention is implemented using the following technical solution:

[0008] In a first aspect, the present invention discloses a bus control system for multiplexing ECMS and DCS networks, including a unit ECMS subsystem and a unit DCS subsystem.

[0009] The unit's ECMS subsystem is equipped with an ECMS-HMI host computer, and the unit's DCS subsystem is equipped with a DCS-HMI host computer.

[0010] The station control layer communication network of the unit ECMS subsystem and the unit DCS subsystem is reused;

[0011] The data of the lower-level machines of the unit ECMS subsystem and the unit DCS subsystem are integrated, and the lower-level machines are respectively connected to the ECMS-HMI upper-level machine and the DCS-HMI upper-level machine through the station control layer communication network.

[0012] The lower-level machine includes an electrical protection device, a protocol conversion device, an electrical redundancy controller, and a process redundancy controller; the electrical redundancy controller is used to collect relevant equipment information of the electrical protection device through the protocol conversion device, and to collect relevant equipment information of the low-voltage plant power intelligent monitoring and control device through the fieldbus; the process redundancy controller is used to collect process-related equipment information through hardwiring and / or fieldbus.

[0013] The ECMS-HMI host computer can collect relevant equipment information of the electrical protection device through the station control layer communication network, and collect relevant equipment information of the low-voltage plant power intelligent measurement and control device through the electrical redundancy controller, so as to monitor the relevant equipment of the electrical protection device and the low-voltage plant power intelligent measurement and control device; it can also collect relevant equipment information of the process through the process redundancy controller, so as to monitor the relevant equipment of the process.

[0014] The DCS-HMI host computer can collect information on electrical protection devices and low-voltage plant power intelligent monitoring and control devices through the electrical redundancy controller to monitor the electrical protection devices and low-voltage plant power intelligent monitoring and control devices; it can also collect information on process-related devices through the process redundancy controller to monitor the process-related devices.

[0015] Furthermore, the electrical protection devices include generator-transformer protection devices, high-voltage plant power supply protection devices, and high-voltage motor protection devices.

[0016] Furthermore, the network architecture of the unit ECMS subsystem is a server / client structure;

[0017] The ECMS-HMI host computer includes an ECMS server, an ECMS engineer station, and an ECMS operator station;

[0018] The ECMS engineer station and ECMS operator station monitor relevant data through the ECMS server.

[0019] Furthermore, the network architecture of the unit DCS subsystem is a distributed parallel structure;

[0020] The DCS-HMI host computer includes a DCS operator station, a DCS engineer station, and a DCS history station. The DCS operator station, DCS engineer station, and DCS history station are in parallel structure and communicate directly with the lower-level computer based on the station control layer communication network to monitor relevant data.

[0021] Furthermore, the low-voltage plant power intelligent monitoring and control device is connected to the electrical redundancy controller via a fieldbus.

[0022] Furthermore, the process-related equipment includes high-voltage motors, low-voltage motors, actuators, and instruments.

[0023] The high-voltage motor, actuator, and instrument are connected to the process redundancy controller via I / O cards.

[0024] The low-voltage motor is connected to the process redundancy controller via fieldbus or hardwiring.

[0025] Furthermore, the security partition of the unit ECMS subsystem and the unit DCS subsystem is Security Zone 1.

[0026] Furthermore, it also includes a public ECMS subsystem and a public DCS subsystem;

[0027] The public ECMS subsystem and public DCS subsystem are divided into different network segments from the unit ECMS subsystem and unit DCS subsystem, and virtual local area networks are set up between the different network segments;

[0028] The public ECMS subsystem is monitored by the ECMS-HMI host computer of the unit ECMS subsystem;

[0029] The common DCS subsystem is monitored by the DCS-HMI host computer of the unit DCS subsystem.

[0030] Secondly, this invention discloses a bus control method for multiplexing ECMS and DCS networks, applied to an ECMS-HMI host computer, comprising the following steps:

[0031] Information on electrical protection devices is collected through the station control layer communication network; information on low-voltage plant power intelligent measurement and control devices is collected through the electrical redundancy controller; and information on process-related devices is collected through the process redundancy controller.

[0032] The electrical protection device related equipment is monitored based on the relevant equipment information of the electrical protection device, the low-voltage plant power intelligent monitoring and control device related equipment is monitored based on the relevant equipment information of the low-voltage plant power intelligent monitoring and control device, and the process related equipment is monitored based on the relevant equipment information.

[0033] Thirdly, this invention discloses a bus control method for multiplexing ECMS and DCS networks, applied to a DCS-HMI host computer, comprising the following steps:

[0034] The electrical redundancy controller collects information on electrical protection devices and low-voltage plant power intelligent measurement and control devices, and the process redundancy controller collects information on process-related devices.

[0035] The electrical protection device related equipment is monitored according to the relevant equipment information of the electrical protection device; the low-voltage plant power intelligent monitoring and control device related equipment is monitored according to the relevant equipment information of the low-voltage plant power intelligent monitoring and control device; and the process related equipment is monitored according to the relevant equipment information.

[0036] The relevant equipment information of the electrical protection device is collected by the protocol conversion device through the station control layer communication network and transmitted to the electrical redundancy controller.

[0037] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0038] The bus control system and method for ECMS and DCS network multiplexing of the present invention firstly improves the networking of the unit ECMS subsystem and the unit DCS subsystem, with each upper computer deployed independently, the station control layer communication network multiplexed, and the lower computer data integrated; secondly, the unit ECMS subsystem and the unit DCS subsystem directly collect and transmit their respective monitoring data, reducing intermediate transmission links and improving reliability.

[0039] This invention avoids redundant data collection by integrating data from the lower-level machines of the ECMS and DCS subsystems. At the same time, it retains the original operation and maintenance characteristics of electrical and thermal control. The responsibilities of thermal and electrical maintenance personnel in power plants are more clearly defined, allowing each to perform their duties and facilitating daily maintenance. It also saves on system investment and construction costs, provides feasible technical support for achieving integrated plant management and control, and provides a solid guarantee for the construction of digital power plants.

[0040] The ECMS subsystem of this invention is geared towards electrical maintenance and management tasks such as monitoring electrical power supply equipment, electrical waveform analysis, and protection setting management. The DCS subsystem is geared towards monitoring process-related aspects of boiler and turbine equipment. At the same time, the ECMS-HMI host computer can also monitor process-related equipment data of the DCS subsystem, and the DCS-HMI host computer can also monitor data of electrical power supply equipment. Both the ECMS and DCS subsystems can provide complete power plant operation data, eliminating information silos, fully leveraging the benefits of the power plant, ensuring the automated operation of thermal power plants, and improving the reliability of the power system. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of a bus control system that multiplexes ECMS and DCS networks;

[0042] Figure 2 This is a schematic diagram of the ECMS subsystem of the unit;

[0043] Figure 3 This is a schematic diagram of the DCS subsystem of the unit unit. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0045] Example 1

[0046] This embodiment 1 discloses a bus control system that multiplexes ECMS and DCS networks, such as Figure 1 As shown, it includes the unit ECMS subsystem and the unit DCS subsystem;

[0047] The unit's ECMS subsystem is equipped with an ECMS-HMI host computer, and the unit's DCS subsystem is equipped with a DCS-HMI host computer.

[0048] The station control layer communication network of the unit ECMS subsystem and the unit DCS subsystem is reused;

[0049] The data of the lower-level machines of the unit ECMS subsystem and the unit DCS subsystem are integrated, and the lower-level machines are respectively connected to the ECMS-HMI upper-level machine and the DCS-HMI upper-level machine through the station control layer communication network.

[0050] The lower-level machine includes a protocol conversion device, an electrical redundancy controller, and a process redundancy controller; the electrical redundancy controller is used to collect relevant equipment information of electrical protection devices through the protocol conversion device, and to collect relevant equipment information of low-voltage plant power intelligent measurement and control devices through the fieldbus; the process redundancy controller is used to collect process-related equipment information through hardwiring and / or fieldbus.

[0051] The ECMS-HMI host computer can collect information on electrical protection devices and related equipment through the station control layer communication network, and collect information on low-voltage plant power intelligent measurement and control devices through the electrical redundancy controller, so as to monitor the electrical protection devices and related equipment; it can also collect information on process-related equipment through the process redundancy controller, so as to monitor the process-related equipment.

[0052] The DCS-HMI host computer can collect information on electrical protection devices and low-voltage plant power intelligent monitoring and control devices through the electrical redundancy controller to monitor these devices. It can also collect information on process-related devices through the process redundancy controller to monitor these devices.

[0053] The technical concept of this invention is as follows: First, the networking of the unit ECMS subsystem and the unit DCS subsystem is improved, with each upper computer deployed independently, the station control layer communication network reused, and the lower computer data integrated; Second, the unit ECMS subsystem and the unit DCS subsystem directly collect and transmit their respective monitoring data, reducing intermediate transmission links and improving reliability.

[0054] The process redundancy controller in this embodiment is a boiler / turbine redundancy controller.

[0055] like Figure 1 and Figure 2 As shown, the network architecture of the unit's ECMS subsystem is a server / client structure;

[0056] The ECMS-HMI host computer includes an ECMS server, an ECMS engineer station, and an ECMS operator station;

[0057] The ECMS engineer station and ECMS operator station monitor relevant data through the ECMS server.

[0058] The unit's ECMS subsystem communicates based on the IEC61850 protocol, and its specific working principle is as follows:

[0059] The electrical protection devices include generator-transformer protection devices, high-voltage plant power supply protection devices, and high-voltage motor protection devices. All of them are connected to the ECMS server based on the IEC61850 protocol to enable direct procurement and transmission of electrical protection devices from the unit's ECMS subsystem.

[0060] The low-voltage plant power intelligent monitoring and control device is connected to the electrical redundancy controller via the ProfibusDP fieldbus master station card. The electrical redundancy controller is connected to the ECMS server based on the IEC61850 protocol to realize direct input and output of the low-voltage plant power intelligent monitoring and control device to the unit ECMS subsystem.

[0061] Process-related equipment is connected to the process redundancy controller via conventional I / O cards or ProfibusDP fieldbus master cards. The process redundancy controller is connected to the ECMS server based on the IEC61850 protocol to enable the unit ECMS subsystem to communicate, collect, and monitor process-related equipment.

[0062] It should be noted that the unit's ECMS subsystem only monitors the electrical protection devices and the low-voltage plant power intelligent monitoring and control devices, and only monitors, but does not control, the process-related equipment.

[0063] like Figure 1 and Figure 3 As shown, the network architecture of the unit DCS subsystem is a distributed parallel structure;

[0064] The DCS-HMI host computer includes a DCS operator station, a DCS engineer station, and a DCS history station. The DCS operator station, DCS engineer station, and DCS history station are in parallel structure and communicate directly with the lower-level computer based on the station control layer communication network to monitor relevant data.

[0065] The specific working principle of the unit's DCS subsystem is as follows:

[0066] The electrical protection devices include generator-transformer protection devices, high-voltage plant power supply protection devices, and high-voltage motor protection devices. All of them communicate with the protocol conversion device via the IEC61850 protocol. The protocol conversion device is connected to the electrical redundancy controller as a remote I / O station. The electrical redundancy controller is connected to the DCS-HMI host computer to realize the monitoring of the electrical protection devices by the unit DCS subsystem.

[0067] The low-voltage plant power intelligent monitoring and control device is connected to the electrical redundancy controller via the ProfibusDP fieldbus master station card. The electrical redundancy controller is connected to the DCS-HMI host computer to realize the monitoring of the low-voltage plant power intelligent monitoring and control device by the unit DCS subsystem.

[0068] Process-related equipment is connected to the process redundancy controller, which in turn connects to the DCS-HMI host computer to enable the unit's DCS subsystem to monitor the process-related equipment.

[0069] It should be noted that process-related equipment includes high-voltage motors, low-voltage motors, actuators, and instruments. High-voltage motors, Class I low-voltage motors, and DC motors are connected to the process redundancy controller via hard-wiring, i.e., I / O cards; conventional low-voltage motors are connected to the process redundancy controller via a Profibus DP fieldbus master card connected to an intelligent motor control unit.

[0070] The unit's DCS subsystem only monitors, does not control, electrical protection devices and low-voltage plant power intelligent monitoring and control devices, and monitors process-related equipment.

[0071] like Figure 1 As shown, this embodiment 1 also includes a common ECMS subsystem and a common DCS subsystem.

[0072] The public ECMS subsystem and the public DCS subsystem are divided into different network segments from the unit ECMS subsystem and the unit DCS subsystem, and virtual local area networks are set up between the different network segments;

[0073] The common ECMS subsystem and the common DCS subsystem do not have separate host computers. The common ECMS subsystem is monitored through the ECMS-HMI host computer of the unit group ECMS subsystem; the common DCS subsystem is monitored through the DCS-HMI host computer of the unit group DCS subsystem.

[0074] The communication networks of the common ECMS subsystem and the common DCS subsystem at the station control layer are reused; data from the common lower-level machines are integrated. The common lower-level machines are connected to the ECMS-HMI upper-level machine and the DCS-HMI upper-level machine respectively through the station control layer communication network. The communication protocol between the ECMS-HMI upper-level machine and the common lower-level machines is the IEC61850 standard protocol, while the communication protocol between the DCS-HMI upper-level machine and the common lower-level machines is the DCS internal protocol.

[0075] The common lower-level machine includes standby transformer protection devices, common high-voltage plant power comprehensive protection devices, common high-voltage motor protection devices, common protocol conversion devices, common electrical redundancy controllers, and common redundancy controllers. The working principle of the common lower-level machine is consistent with that of the lower-level machines in the unit ECMS subsystem and the unit DCS subsystem.

[0076] The security partition for the unit ECMS subsystem and the unit DCS subsystem is Security Zone 1. The security partition for the common ECMS subsystem and the common DCS subsystem is also Security Zone 1.

[0077] Example 2

[0078] This embodiment 2 discloses a bus control method for ECMS and DCS network multiplexing, applied to an ECMS-HMI host computer, including the following steps:

[0079] Information on electrical protection devices is collected through the station control layer communication network; information on low-voltage plant power intelligent measurement and control devices is collected through the electrical redundancy controller; and information on process-related devices is collected through the process redundancy controller.

[0080] The ECMS-HMI host computer monitors the electrical protection devices based on their equipment information, monitors the low-voltage plant power intelligent monitoring and control devices based on their equipment information, and monitors the process-related equipment based on its equipment information.

[0081] Example 3

[0082] This embodiment 3 discloses a bus control method for multiplexing ECMS and DCS networks, applied to a DCS-HMI host computer, including the following steps:

[0083] The electrical redundancy controller collects information on electrical protection devices and low-voltage plant power intelligent measurement and control devices, and the process redundancy controller collects information on process-related devices.

[0084] The DCS-HMI host computer monitors the electrical protection devices based on the relevant equipment information, monitors the low-voltage plant power intelligent measurement and control devices based on the relevant equipment information, and monitors the process-related equipment based on the relevant equipment information.

[0085] Among them, the equipment information related to electrical protection devices is collected by the protocol conversion device through the station control layer communication network and transmitted to the electrical redundancy controller.

[0086] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0087] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0088] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0089] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0090] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A bus control system that multiplexes ECMS and DCS networks, characterized in that, This includes the unit ECMS subsystem and the unit DCS subsystem; The unit's ECMS subsystem is equipped with an ECMS-HMI host computer, and the unit's DCS subsystem is equipped with a DCS-HMI host computer. The station control layer communication network of the unit ECMS subsystem and the unit DCS subsystem is reused; The data of the lower-level machines of the unit ECMS subsystem and the unit DCS subsystem are integrated, and the lower-level machines are respectively connected to the ECMS-HMI upper-level machine and the DCS-HMI upper-level machine through the station control layer communication network. The lower-level machine includes electrical protection device-related equipment, protocol conversion device, electrical redundancy controller, and process redundancy controller; the electrical redundancy controller is used to collect information of electrical protection device-related equipment through the protocol conversion device, and to collect information of low-voltage plant power intelligent monitoring and control device-related equipment through fieldbus; the process redundancy controller is used to collect process-related equipment information through hardwiring and / or fieldbus. The ECMS-HMI host computer can collect relevant equipment information of the electrical protection device through the station control layer communication network, and collect relevant equipment information of the low-voltage plant power intelligent measurement and control device through the electrical redundancy controller, so as to monitor the relevant equipment of the electrical protection device and the low-voltage plant power intelligent measurement and control device; it can also collect relevant equipment information of the process through the process redundancy controller, so as to monitor the relevant equipment of the process. The DCS-HMI host computer can collect information on electrical protection devices and low-voltage plant power intelligent monitoring and control devices through the electrical redundancy controller to monitor these devices. It can also collect information on process-related devices through the process redundancy controller to monitor these devices. The protocol conversion device is connected to the electrical redundancy controller as a remote I / O station of the electrical redundancy controller; The ECMS-HMI host computer is directly connected to the electrical redundancy controller and the process redundancy controller to collect information from the low-voltage plant power intelligent measurement and control device and process-related equipment.

2. The bus control system for ECMS and DCS network multiplexing according to claim 1, characterized in that, The electrical protection devices include generator-transformer protection devices, high-voltage plant power supply protection devices, and high-voltage motor protection devices.

3. The bus control system for ECMS and DCS network multiplexing according to claim 1, characterized in that, The network architecture of the unit's ECMS subsystem is a server / client structure. The ECMS-HMI host computer includes an ECMS server, an ECMS engineer station, and an ECMS operator station; The ECMS engineer station and ECMS operator station monitor relevant data through the ECMS server.

4. The bus control system for ECMS and DCS network multiplexing according to claim 1, characterized in that, The network architecture of the unit DCS subsystem is a distributed parallel structure. The DCS-HMI host computer includes a DCS operator station, a DCS engineer station, and a DCS history station. The DCS operator station, DCS engineer station, and DCS history station are in parallel structure and communicate directly with the lower-level computer based on the station control layer communication network to monitor relevant data.

5. The bus control system for ECMS and DCS network multiplexing according to claim 1, characterized in that, The low-voltage plant power intelligent monitoring and control device is connected to the electrical redundancy controller via a fieldbus.

6. The bus control system for ECMS and DCS network multiplexing according to claim 1, characterized in that, The process-related equipment includes high-voltage motors, low-voltage motors, actuators, and instruments. The high-voltage motor, actuator, and instrument are connected to the process redundancy controller via I / O cards. The low-voltage motor is connected to the process redundancy controller via fieldbus or hardwire.

7. The bus control system for ECMS and DCS network multiplexing according to claim 1, characterized in that, The security partition of the unit ECMS subsystem and the unit DCS subsystem is Security Zone 1.

8. The bus control system for ECMS and DCS network multiplexing according to claim 1, characterized in that, It also includes a public ECMS subsystem and a public DCS subsystem; The public ECMS subsystem and public DCS subsystem are divided into different network segments from the unit ECMS subsystem and unit DCS subsystem, and virtual local area networks are set up between the different network segments; The public ECMS subsystem is monitored by the ECMS-HMI host computer of the unit ECMS subsystem; The common DCS subsystem is monitored by the DCS-HMI host computer of the unit DCS subsystem.

9. A bus control method for multiplexing ECMS and DCS networks, applied to an ECMS-HMI host computer, characterized in that, Includes the following steps: Information on electrical protection devices is collected through the station control layer communication network; information on low-voltage plant power intelligent measurement and control devices is collected through the electrical redundancy controller; and information on process-related devices is collected through the process redundancy controller. The electrical protection device related equipment is monitored according to the relevant equipment information of the electrical protection device; the low-voltage plant power intelligent monitoring and control device related equipment is monitored according to the relevant equipment information of the low-voltage plant power intelligent monitoring and control device; and the process related equipment is monitored according to the relevant equipment information. The protocol conversion device is connected to the electrical redundancy controller as a remote I / O station; the ECMS-HMI host computer is directly connected to the electrical redundancy controller and the process redundancy controller to collect information from the low-voltage plant power intelligent measurement and control device and process-related equipment.

10. A bus control method for multiplexing ECMS and DCS networks, applied to a DCS-HMI host computer, characterized in that, Includes the following steps: The electrical redundancy controller collects information on electrical protection devices and low-voltage plant power intelligent measurement and control devices, and the process redundancy controller collects information on process-related devices. The electrical protection device related equipment is monitored according to the relevant equipment information of the electrical protection device; the low-voltage plant power intelligent monitoring and control device related equipment is monitored according to the relevant equipment information of the low-voltage plant power intelligent monitoring and control device; and the process related equipment is monitored according to the relevant equipment information. The relevant equipment information of the electrical protection device is collected by the protocol conversion device through the station control layer communication network and transmitted to the electrical redundancy controller.

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