Energy storage frequency modulation system network architecture for thermal power plant

Abstract

The utility model belongs to the technical field of power generation control, and particularly discloses an energy storage frequency modulation system network architecture for a thermal power plant. Through a power plant management and control network architecture combining energy storage adjustment and flue gas monitoring, energy storage adjustment and flue gas monitoring technologies in a power plant are organically combined, and the overall operation efficiency and the environmental protection level of the power plant are improved. On one hand, the energy storage system utilizes power plant operation condition information reflected by flue gas monitoring to optimize a charge-discharge strategy and an operation mode of the energy storage system, and the comprehensive benefits of the energy storage system on power plant production are improved; and on the other hand, the flue gas monitoring data is not only used for meeting environmental protection compliance, but also can perform data interaction and collaborative decision with energy storage adjustment from the perspective of power plant energy comprehensive management and efficient utilization, so that dual optimization of the power plant on energy utilization and environmental protection is realized, and the method is suitable for being popularized and used in power output and environmental protection management and control projects of the thermal power plant.

Description

Technical Field

[0001] This utility model belongs to the field of power generation control technology, and specifically discloses a network architecture for an energy storage frequency regulation system for thermal power plants. Background Technology

[0002] In the field of modern power production, with the adjustment of energy structure and increasingly stringent environmental protection requirements, power plant operation faces many challenges. Energy storage regulation and flue gas monitoring technologies play a key role in these challenges. However, because the existing control network architecture of thermal power plants does not integrate the two, coordinated regulation is not yet possible.

[0003] Energy storage systems, as a key supporting technology, can store electrical energy during off-peak hours and release it during peak hours to achieve load balancing and alleviate grid pressure. They also work in conjunction with traditional power sources to ensure stable operation and improve system efficiency. Through prediction and regulation, they reduce the impact of fluctuations, meet grid connection requirements, and provide rapid power support in emergencies, enhancing system stability. However, current applications of energy storage systems in power plants mostly focus solely on storing and releasing electricity to cope with grid load changes, failing to closely integrate with other key production processes within the power plant, resulting in a low degree of synergistic optimization.

[0004] Regarding flue gas monitoring, coal-fired power plant emissions contain particulate matter, carbon dioxide, sulfur dioxide, nitrogen oxides, and trace amounts of carbon monoxide. Particulate matter directly impacts atmospheric environmental quality, while carbon dioxide, sulfur dioxide, and nitrogen oxides are all acidic gases and major contributors to acid rain formation. Continuous emission monitoring systems (CEMS) can monitor pollutants such as sulfur dioxide, particulate matter, carbon monoxide, and carbon dioxide in real time, playing a crucial role in monitoring pollutant emissions from thermal power plants. They are primarily used for monitoring desulfurization processes and pollutant emission procedures. However, existing flue gas monitoring systems mainly focus on acquiring pollutant emission data to meet environmental regulatory requirements, with limited application of monitoring data in optimizing overall power plant production, particularly in coordination with energy storage regulation.

[0005] In summary, currently, energy storage regulation and flue gas monitoring technologies in power plants operate independently, without forming an organic integration. On the one hand, energy storage systems fail to utilize the power plant operating condition information reflected by flue gas monitoring to optimize their charging and discharging strategies and operating modes, thus hindering the improvement of the overall efficiency of energy storage systems for power plant production. On the other hand, flue gas monitoring data is only used to meet environmental compliance requirements, without data interaction and collaborative decision-making with energy storage regulation from the perspective of comprehensive energy management and efficient utilization of the power plant, failing to achieve dual optimization in energy utilization and environmental protection. Therefore, there is an urgent need for a power plant management and control network architecture that integrates energy storage regulation and flue gas monitoring to improve the overall operating efficiency and environmental protection level of power plants. Utility Model Content

[0006] To address the technical problems listed in the background section, this utility model provides a network architecture for an energy storage frequency regulation system used in thermal power plants. The specific technical solution is as follows:

[0007] A network architecture for an energy storage frequency regulation system in a thermal power plant includes a control layer and a field layer. The control layer includes an application Ethernet layer and a control Ethernet layer interconnected by computers. The field layer includes an energy storage frequency regulation system and a flue gas online monitoring system interconnected by field devices and computers. The control Ethernet layer and the application Ethernet layer share data through a server. The frequency regulation system control station and network security monitoring device are connected to the application Ethernet layer through communication connection devices. The frequency regulation system control station, the frequency regulation system coordination controller, and the distributed control system (DCS system) are connected to the control Ethernet layer through communication connection devices. The field layer and the control layer establish a communication connection through optical fiber.

[0008] Preferably, the control Ethernet layer and the energy storage frequency regulation system establish a communication connection through optical fiber, and adopt a dual-line primary and backup redundant connection method for networking.

[0009] Preferably, the control Ethernet layer and the application Ethernet layer communicate with the remote acquisition screen in the remote control system through the server.

[0010] Preferably, the frequency regulation system coordinator is hardwired to the automatic generation control device in the distributed control system and the remote control system, respectively.

[0011] Preferably, the energy storage frequency regulation system includes a flywheel energy storage system and a battery energy storage system.

[0012] Preferably, the flue gas online monitoring system establishes a communication connection with the application Ethernet layer.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] This utility model provides a network architecture for an energy storage frequency regulation system in thermal power plants that improves frequency regulation efficiency. By combining energy storage regulation with flue gas monitoring in a power plant management network architecture, the overall operating efficiency and environmental protection level of the power plant are improved. On the one hand, the energy storage system utilizes the power plant operating condition information reflected by flue gas monitoring to optimize its charging and discharging strategies and operating modes, thereby enhancing the comprehensive benefits of the energy storage system for power plant production. On the other hand, flue gas monitoring data not only meets environmental compliance requirements but also allows for data interaction and collaborative decision-making with energy storage regulation from the perspective of comprehensive energy management and efficient utilization of the power plant, achieving dual optimization of energy utilization and environmental protection.

[0015] In terms of energy storage system planning, by integrating the advantages of thermal power units and flywheel + battery hybrid energy storage systems, the coordinated operation of primary and secondary frequency regulation is achieved, significantly improving frequency regulation efficiency and accuracy. Attached Figure Description

[0016] Figure 1 This is a wiring diagram of the network architecture of the energy storage frequency regulation system for thermal power plants in this embodiment of the present invention;

[0017] A / B are redundant control Ethernet layer backbones in the management and control layer; C is the application Ethernet layer backbone. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] refer to Figure 1 This embodiment provides a network architecture for an energy storage frequency regulation system in a thermal power plant, employing a two-layer (control layer and field layer) network structure. The control layer network includes an application Ethernet layer and a control Ethernet layer interconnected by computers. The field layer network includes an energy storage frequency regulation system and a flue gas online monitoring system interconnected by field devices and computers. In the control layer network, A / B is the control Ethernet layer backbone, with A and B serving as redundant backups, and is connected to the energy storage frequency regulation system in the field layer via optical fiber communication. C is the application Ethernet layer backbone, connected to the flue gas online monitoring system in the field layer via optical fiber communication. The control Ethernet layer and the application Ethernet layer share data through a server. The frequency regulation system control station and network security monitoring device are connected to C via communication connection devices. The frequency regulation system control station is connected to A / B via communication connection devices. The field layer and the control layer establish a communication connection via optical fiber.

[0020] A / B also communicates with the remote acquisition screen in the remote control system via a server.

[0021] The frequency regulation system coordinator is also hardwired to the automatic generation control device (AGC device) in the DCS system and the remote control system, respectively.

[0022] The field-level energy storage and frequency regulation system includes a flywheel energy storage system and a battery energy storage system.

[0023] The on-site flue gas online monitoring system includes a desulfurization online monitoring and data acquisition cabinet, a denitrification online monitoring and data acquisition cabinet, and a CO2 continuous emission monitoring cabinet.

[0024] Under this architecture, NO XInformation on SO2, CO2, and particulate matter concentrations is uploaded to C via optical fiber, and then further uploaded to the remote control system via server to achieve real-time monitoring of emissions. Simultaneously, relevant information from the on-site flywheel energy storage system and battery energy storage system is uploaded to the frequency regulation system control station on A / B via optical fiber. The relevant data is also transferred to the frequency regulation system management station on C via server. The frequency regulation system management station comprehensively analyzes the reference commands issued by the AGC device in the remote control system and the unit DCS cabinet through the frequency regulation system coordination controller, the flue gas information obtained from the server, and the energy storage information it obtains, determines the control strategy, and then sends the relevant commands to the flywheel energy storage system and battery energy storage system on the field layer through the frequency regulation system control station to complete the coordinated control of the energy storage frequency regulation system, thereby improving the economy and environmental protection of the entire power generation system.

[0025] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A network architecture for an energy storage frequency regulation system in a thermal power plant, characterized in that, It includes a control layer and a field layer; the control layer includes an application Ethernet layer and a control Ethernet layer interconnected by computers; the field layer includes an energy storage frequency regulation system and a flue gas online monitoring system interconnected by field devices and computers; the control Ethernet layer and the application Ethernet layer share data through a server; the frequency regulation system control station and network security monitoring device are connected to the application Ethernet layer through communication connection devices; the frequency regulation system control station, the frequency regulation system coordination controller, and the distributed control system are connected to the control Ethernet layer through communication connection devices; the field layer and the control layer establish a communication connection through optical fiber.

2. The network architecture of an energy storage frequency regulation system for thermal power plants according to claim 1, characterized in that, The control Ethernet layer and the energy storage frequency regulation system establish a communication connection through optical fiber, and adopt a dual-line primary and backup redundant connection method for networking.

3. The network architecture of an energy storage frequency regulation system for thermal power plants according to claim 2, characterized in that, The control Ethernet layer and application Ethernet layer communicate with the remote acquisition screen in the remote control system through the server.

4. The network architecture of an energy storage frequency regulation system for thermal power plants as described in claim 3, characterized in that, The frequency regulation system coordinator is hardwired to the automatic generation control device in the distributed control system and the remote control system.

5. The network architecture of an energy storage frequency regulation system for thermal power plants as described in claim 4, characterized in that, Energy storage frequency regulation systems include flywheel energy storage systems and battery energy storage systems.

6. The network architecture of an energy storage frequency regulation system for thermal power plants as described in claim 5, characterized in that, The flue gas online monitoring system establishes a communication connection with the application's Ethernet layer.

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