A network structure for real-time data transmission and production monitoring in power plants

Abstract

The present invention discloses a network structure for real-time data transmission and production monitoring in power plants, belonging to the field of power plant informatization. A one-way physical isolation device is provided between Safety Zone I and Safety Zone III. An AGC control device is located in Safety Zone I and communicates with a DCS system located in Safety Zone I. A database server is located in Safety Zone III. Data from Safety Zone I is transmitted unidirectionally to Safety Zone III via the one-way physical isolation device and stored in the database server in Safety Zone III. A MIS system is located in Safety Zone III. Production process data is transmitted unidirectionally from the DCS system in Safety Zone I to the MIS system in Safety Zone III. The MIS system establishes a communication connection with a management database server in an information center. This invention simplifies the plant-wide automated control and management system, making the system network architecture more concise and clear, and enhancing network security.

Description

Technical Field

[0001] The present invention relates to the field of power plant informatization, and more particularly to a network structure for real-time data transmission and production monitoring in power plants. Background Art

[0002] Existing power plant automation system ( Figure 1 ) includes distributed control systems (DCS), plant-level monitoring information systems (SIS) and plant-level management information systems (MIS), most of which are independently set up. As a plant-level monitoring information system between the DCS system and the MIS system, the SIS system is a set of plant-level monitoring information systems with real-time process monitoring, optimization control and production process management. Due to its network and data security requirements, the production control optimization function cannot be closed-loop and realize two-way data transmission. The optimization results cannot be directly sent to the unit and auxiliary workshop control system, but need to be manually set and selected by the operating personnel for confirmation. At the same time, the plant-level information system is artificially divided into SIS systems and MIS systems, which easily leads to duplicate investment in software and hardware. During the construction phase of a power plant, under the premise of ensuring that the units are put into production safely as scheduled, there is often no time to take care of the SIS system, resulting in the SIS system consuming a lot of money but failing to be effective soon after the power plant units are put into production. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a network structure for real-time data transmission and production monitoring in power plants, thereby simplifying the plant-wide automation control and management system, making the system network architecture more concise and clear, and enhancing network security.

[0004] The object of the present invention is achieved through the following solutions:

[0005] A network structure for real-time data transmission and production monitoring in a power plant includes a safety zone I and a safety zone III of a power plant information system, a one-way physical isolation device is provided between the safety zone I and the safety zone III, and an AGC control device for plant-level load optimization scheduling is provided in the safety zone I. The AGC control device is communicatively connected to a DCS system provided in the safety zone I, and a database server for receiving data from the safety zone I is provided in the safety zone III. The data from the safety zone I is unidirectionally transmitted to the safety zone III through the one-way physical isolation device and stored in the database server in the safety zone III; an MIS system is provided in the safety zone III, and data in the production process is unidirectionally transmitted from the DCS system in the safety zone I to the MIS system in the safety zone III, and the MIS system establishes a communication connection with a management database server of an information center.

[0006] Furthermore, the DCS system includes a plant-level DCS subsystem, which includes a plant-level monitoring network, a plant-level database server, a DCS advanced application server, a plant-level operator station, a plant-level engineer station and a plant-level historical data station. The plant-level monitoring network, the plant-level database server, the DCS advanced application server, the plant-level operator station, the plant-level engineer station and the plant-level historical data station are connected using a communication network.

[0007] Furthermore, the MIS system is provided with a display device for presenting application data and images of the security zone I.

[0008] Furthermore, a plant-level interface server is included, and the plant-level interface server is communicatively connected to the DCS system.

[0009] Furthermore, the DCS system is connected to an optimization device of the SIS system, and the optimization device of the SIS system has built-in performance calculation and optimization diagnosis algorithm function modules.

[0010] Furthermore, the DCS system is provided with an advanced application server group for implementing SIS system and control-related functions.

[0011] Furthermore, the DCS system is provided with a DCS photon alarm device.

[0012] Furthermore, the images include images of a real-time monitoring system for water, coal, and ash.

[0013] Beneficial effects of the present invention:

[0014] The present invention eliminates the SIS system, simplifies the plant-wide automation control and management system, makes the system network architecture simpler and clearer, and enhances network security. Specifically, by eliminating the SIS system in the original Safety Zone II of the original power plant information system, the relevant functions of the SIS system are decomposed into the DCS and MIS systems through structural adjustments. The control optimization logic, performance calculation and other functions related to the production process in the SIS system are decentralized to the DCS system through structural adjustments, and the reporting and assessment functions related to management are moved up to the MIS system through structural adjustments. This simplifies the software and hardware configuration of the control system, reduces duplicate capital investment, optimizes the network structure of the power plant automation system, enables application software to function as quickly as possible, and improves the comprehensive automation level of the power plant without reducing system functions or lowering the power plant's automation level.

[0015] The improved network structure of the present invention and the improved MIS system no longer participate in the production process compared to the network structure of the SIS system, and only read data unidirectionally from the production process, thereby enhancing network security.

[0016] The present invention moves the AGC control device responsible for plant-level load optimization scheduling from the SIS system in safety zone II to the plant-level DCS system in safety zone I, which not only ensures the safety of scheduling but also realizes the plant-level unit load optimization scheduling function.

[0017] The present invention can improve overall efficiency and economic benefits and achieve energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described below are only some embodiments of the present invention. Those skilled in the art can derive other drawings based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the existing network structure used for real-time data transmission and production monitoring in power plants;

[0020] Figure 2 This is a schematic diagram of the network structure for real-time data transmission and production monitoring in a power plant according to the present invention;

[0021] Figure 3 It is a schematic diagram of the principle of the present invention. DETAILED DESCRIPTION

[0022] All features disclosed in all embodiments in this specification, or steps in all methods or processes implicitly disclosed, except for mutually exclusive features and / or steps, can be combined or replaced in any manner.

[0023] The technical solutions of the present invention are described in further detail below with reference to the accompanying drawings. However, the scope of protection of the present invention is not limited to the following. Unless otherwise stated, any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by alternative features that are equivalent or have similar purposes. That is, unless otherwise stated, each feature is merely an example of a series of equivalent or similar features.

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] Various terms appearing in the present application are used only for the purpose of describing particular embodiments and are not intended to limit the present invention. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well.

[0026] When the terms "include" and / or "comprising" are used in this specification, these terms indicate the existence of the stated features, integers, steps, operations, elements and / or parts, but do not exclude the existence and / or addition of one or more other features, integers, steps, operations, elements, parts and / or groups thereof.

[0027] Example 1

[0028] A network structure for real-time data transmission and production monitoring in a power plant includes a safety zone I and a safety zone III of a power plant information system, a one-way physical isolation device is provided between the safety zone I and the safety zone III, and an AGC control device for plant-level load optimization scheduling is provided in the safety zone I. The AGC control device is communicatively connected to a DCS system provided in the safety zone I, and a database server for receiving data from the safety zone I is provided in the safety zone III. The data from the safety zone I is unidirectionally transmitted to the safety zone III through the one-way physical isolation device and stored in the database server in the safety zone III; an MIS system is provided in the safety zone III, and data in the production process is unidirectionally transmitted from the DCS system in the safety zone I to the MIS system in the safety zone III, and the MIS system establishes a communication connection with a management database server of an information center.

[0029] like Figures 2 and 3As shown, the present invention provides a network structure for real-time data transmission and production monitoring in a power plant, which is planned as two layers: the upper layer is Safety Zone III (management information zone) and the lower layer is Safety Zone I (production control zone). The present invention eliminates the conventional SIS system of the power plant (i.e., eliminates Safety Zone II) and splits the functions of the original SIS system. The split principle is: control-related functions are implemented in the DCS, while management-related functions are implemented in the integrated information system (MIS). Necessary application data and images in Safety Zone I can be presented in Safety Zone III. In actual application, the DCS system includes hardware components such as a plant-level monitoring network (Gigabit Ethernet), a plant-level real-time database server, a DCS advanced application server, a plant-level operator station, a plant-level engineer station, and a plant-level historical data station. Using the same hardware products as the unit layer, it collects, stores, and manages real-time and historical information of the unit, utility, auxiliary control, and electrical systems. This provides useful data for the optimization analysis and calculation of the operation of the unit and auxiliary systems, laying the foundation for achieving real-time, efficient, economical, and safe management of the entire plant. At the same time, the functions assigned to the DCS plant level (Safety Zone I) in the original SIS system include data monitoring, collecting production data from all units, utilities, auxiliary systems (water, ash, coal, desulfurization), and the electrical NCS. This data is then comprehensively processed and statistically analyzed, allowing users to uniformly monitor and query each production process from each terminal, as well as display the results, target values, measured input values, intermediate values, and related parameters of various performance calculations (coal consumption, water consumption, electricity consumption, heat consumption, etc.). Furthermore, the real-time control network of each unit and the control network of the auxiliary workshop are connected to the plant-level network via communications, uploading monitoring information to the plant-level network and implementing intelligent alarms, such as DCS photon alarms. This also simplifies the operator's work, reduces operational errors, improves the safety and reliability of unit operation, shortens unit startup time, and improves the unit's economic efficiency.

[0030] The present invention implements the functions that were previously assigned to the integrated information system (Safety Zone III) within the original SIS system. This system incorporates a database server. This structure enables functional applications such as process flow monitoring, which uses real-time screen configuration to align the system's production simulation diagram with the monitoring screens of each production control system, including screens of all real-time monitoring systems, such as the unit DCS, water, coal, and ash. Furthermore, the MIS system can implement indicator assessment and statistical analysis, assessing and evaluating power plant operators and equipment, such as parameters for damaged equipment, assessment of small operating indicators, assessment of economic indicators, and assessment of power generation plans. Statistical analysis is also performed to identify existing problems. Report management can comprehensively process and statistically analyze real-time production data from the entire plant, generating unit or plant-wide production and operation reports as required by the user, and enabling monitoring, querying, and printing.

[0031] Example 2

[0032] Based on Example 1, the DCS system includes a plant-level DCS subsystem, which includes a plant-level monitoring network, a plant-level database server, a DCS advanced application server, a plant-level operator station, a plant-level engineer station and a plant-level historical data station. The plant-level monitoring network, the plant-level database server, the DCS advanced application server, the plant-level operator station, the plant-level engineer station and the plant-level historical data station are connected using a communication network.

[0033] Example 3

[0034] Based on Example 1, the MIS system is provided with a display device for presenting application data and screens of Security Zone I.

[0035] In addition, a plant-level interface server is provided, and the plant-level interface server is communicatively connected to the DCS system.

[0036] Furthermore, the DCS system is connected to an optimization device of the SIS system, and the optimization device of the SIS system has built-in functional modules of performance calculation and optimization diagnosis algorithm.

[0037] Furthermore, the DCS system is provided with an advanced application server group for implementing functions related to the SIS system and control.

[0038] Furthermore, the DCS system is provided with a DCS photon alarm device.

[0039] Furthermore, the images include images of a real-time monitoring system for water, coal, and ash.

[0040] The remaining technical features of this embodiment can be flexibly selected by those skilled in the art to meet different specific practical needs based on actual circumstances. However, it is obvious to those skilled in the art that these specific details are not required to practice the present invention. In other examples, to avoid obscuring the present invention, well-known components, structures, or parts are not described in detail, and are therefore within the scope of the technical solutions claimed in the claims of the present invention.

[0041] In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed", "installed", "connected", and "connected" are all used in a broad sense and should be understood by those skilled in the art. For example, it can be a fixed connection, a movable connection, an integral connection, a partial connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or internal communication between two components, etc. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. That is, the expression of textual language and the implementation of actual technology can be flexibly corresponded, and the expression of the textual language of the specification of the present invention (including the drawings) does not constitute any single restrictive interpretation of the claims.

[0042] Modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention are intended to be within the scope of the claims appended hereto. In the foregoing description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that these specific details are not necessarily required to practice the present invention. In other instances, well-known techniques, such as specific construction details, operating conditions, and other technical requirements, are not described in detail to avoid obscuring the present invention.

Claims

1. A network structure for real-time data transmission and production monitoring in a power plant, characterized in that: It includes a safety zone I and a safety zone III of the power plant information system, a one-way physical isolation device is provided between the safety zone I and the safety zone III, and an AGC control device for plant-level load optimization scheduling is provided in the safety zone I, the AGC control device is communicated with the DCS system provided in the safety zone I, a database server for receiving data from the safety zone I is provided in the safety zone III, the data from the safety zone I is unidirectionally transmitted to the safety zone III through the one-way physical isolation device, and is stored in the database server in the safety zone III; an MIS system is provided in the safety zone III, and data in the production process is unidirectionally transmitted from the DCS system in the safety zone I to the MIS system in the safety zone III, and the MIS system establishes a communication connection with the management database server of the information center.

2. The network structure for real-time data transmission and production monitoring of a power plant according to claim 1 is characterized in that: The DCS system includes a plant-level DCS subsystem, which includes a plant-level monitoring network, a plant-level database server, a DCS advanced application server, a plant-level operator station, a plant-level engineer station and a plant-level historical data station. The plant-level monitoring network, the plant-level database server, the DCS advanced application server, the plant-level operator station, the plant-level engineer station and the plant-level historical data station are connected using a communication network.

3. The network structure for real-time data transmission and production monitoring of a power plant according to claim 1 is characterized in that: The MIS system is provided with a display device for presenting application data and screens of Security Zone I.

4. The network structure for real-time data transmission and production monitoring of a power plant according to claim 1 is characterized in that: It includes a plant-level interface server, which is communicatively connected to the DCS system.

5. The network structure for real-time data transmission and production monitoring of a power plant according to claim 1 is characterized in that: The DCS system is connected to an optimization device of the SIS system, and the optimization device of the SIS system has built-in performance calculation and optimization diagnosis algorithm function modules.

6. The network structure for real-time data transmission and production monitoring of a power plant according to claim 1 is characterized in that: The DCS system is provided with an advanced application server group for implementing functions related to the SIS system and control.

7. The network structure for real-time data transmission and production monitoring of a power plant according to claim 1 is characterized in that: The DCS system is provided with a DCS photon alarm device.

8. The network structure for real-time data transmission and production monitoring of a power plant according to claim 1 is characterized in that: The images include those of the real-time monitoring system for water, coal and ash.

Images