A compressed air energy storage power station electrical monitoring system configuration method

Abstract

The application discloses a compressed air energy storage power station electrical monitoring system configuration method, and belongs to the technical field of compressed air energy storage power station electrical monitoring, and comprises the following steps: S1, constructing a two-layer network architecture, canceling an independent communication management layer in a traditional three-layer architecture, and integrating the independent communication management layer function and an interval layer into a communication measurement and control layer; wherein the two-layer network architecture comprises a central control layer and the communication measurement and control layer; S2, configuring an integrated device integrating communication management functions and comprehensive protection measurement and control functions, the integrated device being arranged at a front position of each subsystem of the power station; S3, the integrated device being placed into on-site equipment switch cabinets of each subsystem, and a communication connection being established between the integrated device and the central control layer through a preset transmission medium; and S4, intelligent auxiliary equipment of a unit in the power station directly uploading operation information to core network equipment of the central control layer in a network connection mode. The application provides an integrated and simplified configuration scheme, and can be applied to different compressed air energy storage power stations.

Description

Technical Field

[0001] This invention relates to the field of electrical monitoring technology for compressed air energy storage power stations, and in particular to a configuration method for an electrical monitoring system of a compressed air energy storage power station. Background Technology

[0002] As an important component of new energy storage, the performance of the electrical monitoring system of a compressed air energy storage power station directly affects the safe and stable operation and dispatch efficiency of the power station, which places higher demands on the comprehensiveness of information collection, the reliability of data transmission, the anti-interference ability, and the cost-effectiveness of the monitoring system.

[0003] Traditional power plant electrical monitoring systems generally employ a three-layer network architecture: a central control layer (master station layer), a communication management layer, and a bay control layer. This architecture uses a dual-network redundancy configuration. The bay layer connects to the communication management layer via fieldbus, and then the communication management layer connects to the central control layer. Both the central control layer and the communication management layer use a centralized panel installation method. However, this traditional architecture has several drawbacks: First, the centralized panel method requires a large amount of space in electronic equipment cabinets, leading to a crowded layout of electrical equipment rooms in the power plant and limiting the installation space for other equipment. Second, a large number of communication cables need to be laid between layers and between devices, increasing not only cable procurement costs but also the difficulty and labor costs of construction and wiring. Third, the signal transmission path in a multi-layered architecture is long, posing a risk of signal attenuation and interference, affecting the real-time performance and accuracy of data transmission. Fourth, the large number of devices, each with relatively simple functions, results in a large workload for system maintenance and high difficulty in troubleshooting.

[0004] With the popularization of intelligent power plant operation mode and the promotion of new energy storage systems, compressed air energy storage power plants have put forward new core requirements for electrical monitoring systems: First, to realize the unified collection and centralized management of power supply information for the entire power plant, breaking the information silos of traditional equipment; second, to ensure the reliability, anti-interference and efficiency of data transmission, meeting the needs of real-time monitoring and rapid response of the power plant; third, to simplify the system connection method, realize information sharing between equipment while ensuring electrical isolation, and avoid the spread of faults; and fourth, to reduce the system construction cost and operation and maintenance cost while meeting functional requirements.

[0005] In the existing technology, there is no simplified electrical monitoring system configuration scheme designed specifically for the characteristics of compressed air energy storage power stations. The traditional three-layer architecture configuration method can no longer meet the operational requirements of new compressed air energy storage power stations. Therefore, there is an urgent need for an electrical monitoring system configuration method that can solve the above-mentioned technical problems and take into account reliability, efficiency and economy. Summary of the Invention

[0006] To address the issue that traditional three-tier architecture configuration methods are no longer suitable for the operational requirements of new compressed air energy storage power stations, this invention provides a configuration method for the electrical monitoring system of a compressed air energy storage power station. It proposes an integrated and simplified configuration scheme that can be widely applied to compressed air energy storage power stations of different capacity levels.

[0007] The technical solution adopted by the present invention for configuring an electrical monitoring system for a compressed air energy storage power station is as follows: A method for configuring an electrical monitoring system for a compressed air energy storage power station includes the following steps: S1. Construct a two-layer network architecture, eliminating the independent communication management layer in the traditional three-layer architecture, and integrating the functions of the independent communication management layer and the interval layer into a communication measurement and control layer; the two-layer network architecture includes a central control layer and a communication measurement and control layer. S2. An integrated device that integrates communication management functions and comprehensive protection and control functions is deployed at the front end of each subsystem of the power station. S3. The integrated device is placed in the local equipment switch cabinet of each subsystem and establishes a communication connection with the central control layer through a preset transmission medium. S4. The intelligent auxiliary equipment of the generating units in the power station directly uploads the operating information to the core network equipment of the central control layer through network connection.

[0008] A further improvement of the technical solution of the present invention is that the central control layer includes a power plant monitoring master station layer, which is set in the electrical and electronic equipment room and the control room, and includes core control equipment, data storage equipment, human-computer interaction equipment and network switching equipment; wherein, the core control equipment includes an electrical monitoring system server, and the network switching equipment includes a switch.

[0009] A further improvement of the technical solution of the present invention is that the integrated device includes a comprehensive protection communication and control device. The hardware terminal of the comprehensive protection communication and control device integrates communication data forwarding, electrical equipment control and protection, and operation status monitoring and control functions. Moreover, the interface type of the hardware terminal is adapted to the communication needs of the local equipment and the central control layer of the subsystem.

[0010] A further improvement of the technical solution of the present invention is that: the communication measurement and control layer includes at least two integrated protection communication measurement and control devices, each integrated protection communication measurement and control device being connected to a local device of a subsystem; wherein, the local device includes an integrated protection device and a protection device, and the integrated protection communication measurement and control device and the local device establish wired communication through the device's built-in interface.

[0011] A further improvement of the technical solution of the present invention is that the core network equipment of the central control layer adopts a dual-network redundancy configuration, and the communication link between the communication measurement and control layer and the central control layer adopts a single-fiber bidirectional or dual-fiber bidirectional transmission mode.

[0012] A further improvement of the technical solution of the present invention is that one end of the preset transmission medium is connected to the optical communication interface of the integrated device, and the other end is connected to the optical port of the switch in the central control layer.

[0013] The technological advancements achieved by this invention due to the adoption of the above technical solutions are as follows: This invention simplifies the traditional three-layer network architecture into a two-layer structure consisting of a central control layer and a communication and measurement control layer. It eliminates the independent communication management layer, reducing signal transmission delays caused by the layered architecture and lowering system complexity. Simultaneously, the simplified layering reduces the number of devices required at each layer, lowering equipment procurement and installation costs.

[0014] This invention proposes an integrated design for a "comprehensive protection communication and control device," which integrates three core functions—communication management, comprehensive protection and control, and operation monitoring and control—on a single hardware terminal. This changes the traditional architecture where communication equipment and protection and control equipment are set up separately. This integrated design not only reduces the total number of devices but also saves installation space in the switchgear, making the internal layout of the switchgear more reasonable. At the same time, it reduces the interface adaptation cost between devices and reduces the risk of failure caused by incompatible device interfaces.

[0015] This invention places the integrated protection communication and control device into the local equipment switch cabinet of each subsystem, replacing the traditional centralized panel installation method, shortening the connection distance between the device and the local equipment, and reducing the amount of short-distance connection cables used.

[0016] In this invention, the unit's intelligent auxiliary equipment is directly connected to the central control layer's switch via network cables, maximizing the utilization of the central control layer's server hardware resources. By optimizing device interface configuration, unified access to information from various intelligent devices can be achieved without the need for additional interface expansion equipment. This design not only reduces equipment investment and floor space but also provides a hardware foundation for future expansion of additional functions into the system. Attached Figure Description

[0017] Figure 1 This is a diagram of the electrical monitoring system for the compressed air energy storage power station of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. In the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of this invention.

[0019] like Figure 1As shown in the figure, this embodiment discloses a configuration method for an electrical monitoring system of a compressed air energy storage power station. It adopts a two-layer network architecture, specifically including a central control layer and a communication and measurement control layer. The independent communication management layer in the traditional three-layer architecture is eliminated, and the communication management function and the protection and measurement control function of the interval layer are integrated into the communication and measurement control layer.

[0020] In this embodiment, the central control layer is located in the electrical and electronic equipment room and control room of the power plant. Core equipment includes an Electrical Monitoring System (ECMS) server panel, switches, operator stations, engineer stations, a laser printer, and a clock device. The ECMS server panel contains two redundant servers for data storage, processing, and issuing system control commands. The switches are industrial-grade gigabit Ethernet switches; optical ports connect to the communication and control layer, while electrical ports connect to intelligent auxiliary equipment and other terminal devices. The operator stations are equipped with high-resolution displays to show the real-time operating status, parameter data, and alarm information of various electrical equipment in the power plant, supporting remote control operations. The engineer stations are equipped with displays for system configuration, program debugging, troubleshooting, and software upgrades. The laser printer prints operating reports, fault records, and other documents. The clock device provides a unified time reference for all equipment in the central control layer and the communication and control layer.

[0021] In this embodiment, the communication and control layer is configured for each subsystem of the power station, with one integrated protection communication and control device configured for each subsystem. The integrated protection communication and control device adopts a modular hardware design, with built-in communication module, protection module, and control module. The communication module supports multiple communication protocols such as IEC61850 and Modbus. The protection module has conventional protection functions such as overcurrent protection, overvoltage protection, and grounding protection, as well as dedicated protection logic for compressed air energy storage equipment. The control module can collect various electrical parameters such as current, voltage, power, and energy.

[0022] The integrated protection communication and control device is installed in the local equipment switchgear of each subsystem. Dedicated installation positions are reserved within the switchgear, and the device is fixedly connected to the mounting beams on the inner wall of the switchgear using bolts. The wiring terminals of the integrated protection communication and control device employ a threaded locking structure to prevent loosening. The input terminals of the device are connected to current transformers, voltage transformers, and other sensors within the switchgear via shielded cables to collect equipment operating parameters. The output terminals are connected to actuators such as circuit breakers and disconnect switches via control cables to output protection trip commands and control commands. The communication terminals are connected to the device's built-in communication module via internal wiring.

[0023] This embodiment uses single-mode dual-fiber as the transmission medium. One end of the fiber is connected to the optical communication interface of the integrated protection communication and control device via an SC / PC optical connector, and the other end is laid through a cable trench to the electrical and electronic equipment room, where it is connected to the optical port of the central control layer switch via an SC / PC optical connector. Each integrated protection communication and control device corresponds to an independent fiber optic link, employing a dual-fiber bidirectional transmission mode.

[0024] In this embodiment, the intelligent auxiliary equipment of the unit includes generator-transformer protection device, synchronizing device, fast switching device, DC system equipment and UPS uninterruptible power supply equipment. These devices are installed in a dedicated cabinet in the electrical and electronic equipment room.

[0025] The ECMS server and switch are connected via gigabit Ethernet cables. The two servers are connected to different ports on the switch to achieve dual-machine redundancy backup. When one server fails, the other server can seamlessly take over the work, ensuring continuous system operation. Operator stations and engineer stations are connected to the switch via Ethernet cables to establish communication connections with the ECMS server, enabling functions such as data viewing and command issuance. The laser printer is connected to the operator station via a USB interface, and the operator station controls the printing operation. The clock device is connected to the switch via an RS485 interface to send time synchronization signals to all devices connected to the system, ensuring time consistency among all devices.

[0026] In the above embodiments, a configuration method for an electrical monitoring system of a compressed air energy storage power station is provided. The present invention simplifies the traditional three-layer network architecture into a two-layer structure of a central control layer and a communication and measurement control layer, eliminates the independent communication management layer, reduces signal transmission delay caused by the architecture layer, and reduces system complexity. Meanwhile, the simplified hierarchical structure reduces the number of devices at each level, lowering equipment procurement and installation costs. This invention proposes an integrated design for the "Comprehensive Protection Communication and Control Device," integrating three core functions—communication management, comprehensive protection and control, and operation monitoring and control—on a single hardware terminal, changing the traditional architecture where communication equipment and protection and control equipment are separated. This integrated design not only reduces the total number of devices but also saves installation space within switchgear, making the internal layout of the switchgear more rational. It also reduces interface adaptation costs between devices and minimizes the risk of failures due to incompatible interfaces. This invention places the comprehensive protection communication and control device within the local switchgear of each subsystem, replacing the traditional centralized panel installation method, shortening the connection distance between the device and local equipment, and reducing the use of short-distance connection cables. In this invention, the unit's intelligent auxiliary equipment is directly connected to the central control layer's switch via network cables, maximizing the utilization of the central control layer's server hardware resources. By optimizing device interface configuration, unified access to information from various intelligent devices can be achieved without the need for additional interface expansion equipment. This design not only reduces equipment investment and floor space but also provides a hardware foundation for future system expansion and additional functions.

[0027] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the inventive concept should fall within the protection scope of the present invention. All technical contents for which protection is sought in this invention are fully described in the claims.

Claims

1. A method for configuring an electrical monitoring system for a compressed air energy storage power station, characterized in that, Includes the following steps: S1. Construct a two-layer network architecture, eliminating the independent communication management layer in the traditional three-layer architecture, and integrating the functions of the independent communication management layer and the interval layer into a communication measurement and control layer; the two-layer network architecture includes a central control layer and a communication measurement and control layer. S2. An integrated device that integrates communication management functions and comprehensive protection and control functions is deployed at the front end of each subsystem of the power station. S3. The integrated device is placed in the local equipment switch cabinet of each subsystem and establishes a communication connection with the central control layer through a preset transmission medium. S4. The intelligent auxiliary equipment of the generating units in the power station directly uploads the operating information to the core network equipment of the central control layer through network connection.

2. The configuration method of an electrical monitoring system for a compressed air energy storage power station according to claim 1, characterized in that: The central control layer includes a power plant monitoring master station layer, located in the electrical and electronic equipment room and control room, and includes core control equipment, data storage equipment, human-machine interaction equipment and network switching equipment; wherein, the core control equipment includes an electrical monitoring system server, and the network switching equipment includes switches.

3. The configuration method of an electrical monitoring system for a compressed air energy storage power station according to claim 2, characterized in that: The integrated device includes a comprehensive protection communication and control device. The hardware terminal of the comprehensive protection communication and control device integrates communication data forwarding, electrical equipment control and protection, and operation status monitoring and control functions. The interface type of the hardware terminal is adapted to the communication needs of the local equipment and the central control layer of the subsystem.

4. The configuration method of an electrical monitoring system for a compressed air energy storage power station according to claim 3, characterized in that: The communication and control layer includes at least two integrated protection communication and control devices, each of which is connected to a local device of a subsystem. The local device includes an integrated protection device and a support device. The integrated protection communication and control device and the local device establish wired communication through the device's built-in interface.

5. The configuration method of an electrical monitoring system for a compressed air energy storage power station according to claim 1, characterized in that: The core network equipment of the central control layer adopts a dual-network redundancy configuration, and the communication link between the communication measurement and control layer and the central control layer adopts a single-fiber bidirectional or dual-fiber bidirectional transmission mode.

6. The configuration method of an electrical monitoring system for a compressed air energy storage power station according to claim 1, characterized in that: One end of the preset transmission medium is connected to the optical communication interface of the integrated device, and the other end is connected to the optical port of the switch in the central control layer.

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