Compressed air energy storage power station control system based on DCS integration

Abstract

The utility model relates to the field of compressed air energy storage power stations, in particular to a compressed air energy storage power station control system based on DCS (distributed control system) integration, which comprises a three-layer framework including a monitoring layer, a control layer and an on-site equipment layer from top to bottom, and each layer comprises a compressor, an expansion machine, a heat storage and exchange system and an auxiliary workshop system. The whole compressed air energy storage power station control system adopts software and hardware of a DCS (Distributed Control System) to realize integrated control. The whole compressed air energy storage power station including compressor control and expansion machine control adopts a unified monitoring platform DCS, the network structure is optimized, and communication connection between independent systems is reduced. The whole system is simpler, more convenient to configure, and convenient to debug, operate, overhaul and maintain. The system monitoring layer equipment can be standby for each other, is suitable for an all-round on-duty operation mode, facilitates the simplification of the configuration of an operator station, and achieves the purposes of reducing people and improving efficiency. The compressed air energy storage power station can solve the technical problem that an existing compressed air energy storage power station cannot be integrated.

Description

Technical Field

[0001] The utility model relates to the field of compressed air energy storage power stations, and in particular to a compressed air energy storage power station control system based on DCS integration. Background Art

[0002] DCS, short for Distributed Control System, integrates numerous technologies, including computer communications, display, and control, and is commonly used in power plant control systems. A compressed gas energy storage power plant is a new type of energy storage plant. Its process systems primarily include a compressor unit system, a turbine generator system, a heat storage and exchange system, and auxiliary workshop systems.

[0003] The compressor and expander, two key components of compressed air energy storage power plants, are typically controlled by control systems supplied by their respective manufacturers. These control systems typically utilize dedicated control devices. Due to inconsistencies in hardware and software between these dedicated control devices and the DCS, they can only be connected to the DCS via communication. This prevents the plant's overall control system from achieving integrated integration, leading to significant inconvenience in the operation, management, and maintenance of the entire compressed air energy storage power plant. Utility Model Content

[0004] The purpose of this utility model is to provide a DCS-based integrated compressed air energy storage power station control system, which can solve the technical problem that existing compressed air energy storage power stations cannot achieve integrated integration.

[0005] To achieve the above objectives, the present invention designs a DCS-integrated compressed gas energy storage power station control system, which includes a three-layer architecture: from top to bottom, the monitoring layer, the control layer, and the on-site equipment layer. Each layer contains a compressor, an expander, a heat storage and exchange system, and an auxiliary workshop system. The entire compressed gas energy storage power station control system uses the software and hardware of the DCS control system to achieve integrated control.

[0006] As a preferred solution, the monitoring layer includes a DCS redundant communication network, a compressor operator station, a DCS operator station, an expander operator station, a compressor engineer station, an expander engineer station, a DCS engineer station, a DCS shift manager station, and a DCS history station / database server, which are respectively connected in parallel to the DCS redundant communication network.

[0007] As a preferred solution, the control layer includes a DCS redundant communication network, compressor system control layer equipment, compression side heat exchange system control layer equipment, heat storage system control layer equipment, in-plant auxiliary system control layer equipment, out-of-plant auxiliary system control layer equipment, expander system control layer equipment, and expansion side heat exchange system control layer equipment, which are respectively connected in parallel to the DCS redundant communication network.

[0008] Furthermore, the control layer also includes an off-site operator / engineer station, and the off-site operator / engineer station is arranged in parallel in the off-site auxiliary system control layer equipment.

[0009] As a preferred solution, the on-site equipment layer includes on-site equipment of the compression side system, on-site equipment of the heat storage system and auxiliary workshop system, and on-site equipment of the expansion side system; the on-site equipment of the compression side system is respectively connected to the compressor system control layer equipment and the compression side heat exchange system control layer equipment; the on-site equipment of the heat storage system and auxiliary workshop system is respectively connected to the heat storage system control layer equipment, the in-plant auxiliary system control layer equipment, and the out-of-plant auxiliary system control layer equipment; the on-site equipment of the expansion side system is respectively connected to the expander system control layer equipment and the expansion side heat exchange system control layer equipment.

[0010] As a preferred solution, the control systems of the compressor and expander respectively adopt the same software and hardware as the DCS control system, and their controllers respectively adopt the high-performance redundant DPU of the DCS control system, which is directly connected to the redundant DCS control system communication network and establishes connections with other nodes through the DCS control system network. The control system monitoring layer equipment of the compressor and expander is uniformly set with the monitoring layer equipment of the DCS control system.

[0011] As a preferred solution, the heat storage and exchange system and the auxiliary workshop system are directly incorporated into the DCS control system, and DPUs are allocated to them according to the principle of decentralization. Connections are established with other nodes through the DCS control system network, and the monitoring layer equipment of the heat storage and exchange system and the auxiliary workshop control system are uniformly set up with the monitoring layer equipment of the DCS control system.

[0012] Beneficial effects of the utility model:

[0013] The utility model provides a DCS-based integrated compressed air energy storage power station control system, which includes the entire compressed air energy storage power station, including compressor control and expander control. It adopts DCS as a unified monitoring platform, optimizes the network structure, and reduces the communication connections between independent systems. The entire system is simpler, more convenient to configure, convenient for commissioning and operation, and convenient for inspection and maintenance. The monitoring layer equipment of each system can serve as a backup for each other and is suitable for an all-round duty operation mode, which is conducive to simplifying the configuration of the operator station and achieving the purpose of reducing manpower and increasing efficiency. The utility model can solve the technical problem that existing compressed air energy storage power stations cannot achieve integrated integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the control system of a compressed gas energy storage power station based on DCS integration.

[0015] Description of reference numerals:

[0016] 101-Compressor operator station, 102-DCS operator station, 103-Expander operator station, 201-Compressor engineer station, 202-Expander engineer station, 203-DCS engineer station, 204-DCS shift supervisor station, 205-DCS historian / database server, 301-DCS printer, 400-DCS printer network, 500-DCS redundant communication network;

[0017] 206-Off-site operator / engineer station, 501-Compressor system control layer equipment, 502-Compression side heat exchange system control layer equipment, 503-Heat storage system control layer equipment, 504-In-plant auxiliary system control layer equipment, 505-Off-site auxiliary system control layer equipment, 506-Expander system control layer equipment, 507-Expansion side heat exchange system control layer equipment;

[0018] 601-Compression side system on-site equipment, 602-Heat storage system and auxiliary workshop system on-site equipment, 603-Expansion side system on-site equipment. DETAILED DESCRIPTION

[0019] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of it.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0022] The purpose of this utility model is to provide a control system for a compressed gas energy storage power station, which can realize the integrated control of the entire compressed gas energy storage power station (including the compressor, expander, heat storage and exchange system, and auxiliary workshop system) based on DCS. To achieve this purpose, this utility model adopts the following technical solutions:

[0023] The utility model relates to a compressed gas energy storage power station control system based on DCS integration, which includes a three-layer architecture, namely, a monitoring layer, a control layer, and an on-site equipment layer from top to bottom. Each layer contains a compressor, an expander, a heat storage and exchange system, and an auxiliary workshop system. The entire compressed gas energy storage power station control system adopts the software and hardware of the DCS control system to achieve integrated control.

[0024] The DCS-based integrated compressed gas energy storage power station control system, including the compressor, expander, heat storage and exchange system, and auxiliary workshop systems, is implemented using a DCS. The compressed gas energy storage power station control system implemented by this control system can be divided into a three-layer architecture: monitoring layer, control layer, and on-site equipment layer. Compressed gas refers to compressed air or gases such as CO2.

[0025] The monitoring layer consists of redundant dual communication networks (loops or buses) and their loaded node stations, among which the node stations include operator stations, engineer stations, history stations, database servers, printers, etc., completing the communication of the human-machine interface and the information exchange between stations, realizing the monitoring of the compressed air energy storage power station, performance calculation, operation guidance, printing and recording of various information, report storage, programming and configuration of various systems, debugging and adjustment, etc.

[0026] The control layer consists of controllers (DPUs, Data Processing Units), I / O modules, and other components. DPUs are configured according to the principles of decentralization for each process system. They are used for data storage and control logic operations. They connect to monitoring layer nodes and other DPUs via dual communication networks and to internal I / O modules via redundant I / O buses, providing two-way information exchange and implementing various control logics, including signal acquisition, analog regulation, sequential control, and protection interlocking. The DPUs utilize a dual-redundant configuration, with each DPU in a pair operating independently and enabling seamless switching, enabling online maintenance and debugging.

[0027] The local equipment layer includes local equipment such as detection instruments, actuators, and motors. Its I / O measurement points are connected to the I / O module through cables to establish a connection with the DPU of the control layer.

[0028] The compressor, a key component of a compressed gas energy storage power station, has a control system that uses the same hardware and software as the DCS. Its controller utilizes the DCS's high-performance redundant DPU, directly connected to the redundant DCS communication network and connected to other nodes via the DCS network. The compressor control system's monitoring layer is configured uniformly with the DCS monitoring layer.

[0029] The expander, a key component of compressed gas energy storage power plants, utilizes a control system with the same hardware and software as the DCS. Its controller utilizes the DCS's high-performance redundant DPU, directly connected to the redundant DCS communication network and connected to other nodes via the DCS network. The expander control system's monitoring layer is configured uniformly with the DCS monitoring layer.

[0030] The heat storage and exchange system and auxiliary workshop systems are directly integrated into the DCS control system. DPUs are assigned to them according to the decentralized principle, and they are directly connected to the redundant DCS communication network and connected to other nodes through the DCS network. The monitoring layer equipment of the heat storage and exchange system and auxiliary workshop control system is configured uniformly with the DCS monitoring layer equipment.

[0031] The specific solutions of the present invention are described below with reference to the accompanying drawings. The accompanying drawings are only used for illustrative purposes and are not physical drawings, and should not be understood as limiting the present invention.

[0032] The compressed gas energy storage power station control system based on DCS integration consists of the monitoring layer, control layer, and on-site equipment layer from top to bottom.

[0033] At the monitoring layer, the equipment includes a redundant communication network 500, operator stations 101-103, engineer stations 201-203, a history station / database server 205, a printer 301, and the like.

[0034] The compressor system is monitored and controlled via the compressor operator station 101, the heat storage and exchange system and auxiliary workshop systems are monitored and controlled via the DCS operator station 102, and the expander system is monitored and controlled via the expander operator station 103. The compressor operator station 101, DCS operator station 102, and expander operator station 103 can serve as backup stations for each other, and their number can be increased or decreased based on actual needs.

[0035] The compressor system is configured and debugged at the compressor engineer station 201, the expander system is configured and debugged at the expander engineer station 202, and the heat storage and exchange system and auxiliary workshop systems are configured and debugged at the DCS engineer station 203. The compressor engineer station 201, expander engineer station 202, and DCS engineer station 203 can serve as backup for each other, and their number can be increased or decreased based on actual needs.

[0036] The production data report of the pressure storage power station is printed by the DCS printer 301. The DCS printer 301 can be connected to other monitoring layer nodes by using the DCS redundant communication network 500, or a separate DCS printer network 400 can be formed.

[0037] The control layer, which includes controllers (DPUs) and I / O modules, is planned and configured based on the compressed gas energy storage power station's process systems. It primarily includes 501 - compressor system control layer equipment, 502 - compression-side heat exchange system control layer equipment, 503 - heat storage system control layer equipment, 504 - in-plant auxiliary system control layer equipment, 505 - off-plant auxiliary system control layer equipment, 506 - expander system control layer equipment, and 507 - expansion-side heat exchange system control layer equipment. 504 - instrument air compressor station, integrated water supply, and other auxiliary system control layer equipment.

[0038] The compressor system control layer equipment 501 and the compression side heat exchange system control layer equipment 502 constitute the compressor electronic equipment room, the heat storage system control layer equipment 503, the on-site auxiliary system control layer equipment 504, and the off-site auxiliary system control layer equipment 505 constitute the on-site electronic equipment room, and the expander system control layer equipment 506 and the expansion side heat exchange system control layer equipment 507 constitute the turbine electronic equipment room.

[0039] The compressor system control layer device 501 and the expander system control layer device 506 utilize the same hardware and software as the DCS, eliminating the need for a communication interface and directly connecting to the DCS's redundant communication network. The number of DPUs can be planned based on actual needs. The compressor system control layer device 501 is located in the compressor electronics room, while the expander system control layer device 506 is located in the expander electronics room.

[0040] The control system of the compressed gas energy storage power station is divided into two working modes: compression and expansion. The heat storage and exchange system is correspondingly divided into compression side heat exchange system control layer equipment 502, heat storage system control layer equipment 503, and expansion side heat exchange system control layer equipment 507. Among them, the compression side heat exchange system control layer equipment 502 is related to the compression side control, and the DPU can be planned separately or in a unified manner with the compressor system control layer equipment 501; the expansion side heat exchange system control layer equipment 507 is related to the expansion side control, and the DPU can be planned separately or in a unified manner with the expander system control layer equipment 506; the expansion side heat exchange system control layer equipment 507 is a public system, related to both compression and expansion, and the DPU can be planned separately.

[0041] The in-plant auxiliary system control layer device 504 represents the auxiliary workshop system control layer device set up in the power plant, which is directly connected to the DCS redundant communication network. The number of DPUs is planned according to the specific configuration of the in-plant auxiliary workshop system.

[0042] The off-site auxiliary system control layer equipment 505 represents the auxiliary workshop system control layer equipment set up outside the power plant, which is directly connected to the DCS redundant communication network. The number of DPUs is planned according to the specific configuration of the off-site auxiliary workshop system. Considering the convenience of debugging the off-site auxiliary workshop system, an off-site operator / engineer station 206 can be set up. The off-site operator / engineer station can directly connect to the DCS redundant communication network, and can also form a redundant DCS communication subnet separately with the off-site auxiliary system control layer equipment 505.

[0043] At the on-site equipment layer, the equipment is mainly divided into 601-compression side system on-site equipment, 602-heat storage system and auxiliary workshop system on-site equipment, and 603-expansion side system on-site equipment according to the system.

[0044] The specific execution control system described above is merely a preferred implementation example of the present invention. Those skilled in the art will appreciate that various modifications, equivalent substitutions, and variations may be made to the present invention. However, as long as these modifications do not depart from the spirit of the present invention, they are within the scope of protection of the present invention. Furthermore, certain terms used in the specification and claims of the present invention are not intended to be limiting but are merely for descriptive purposes. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A DCS-integrated compressed gas energy storage power station control system, characterized by: It includes a three-layer architecture, from top to bottom: monitoring layer, control layer, and on-site equipment layer. Each layer contains compressors, expanders, heat storage and exchange systems, and auxiliary workshop systems. The entire compressed gas energy storage power station control system uses the DCS control system's software and hardware to achieve integrated control.

2. A DCS-integrated compressed gas energy storage power station control system according to claim 1, characterized in that: The monitoring layer includes a DCS redundant communication network, a compressor operator station, a DCS operator station, an expander operator station, a compressor engineer station, an expander engineer station, a DCS engineer station, a DCS shift manager station, and a DCS history station / database server, which are respectively connected in parallel to the DCS redundant communication network.

3. A DCS-integrated compressed gas energy storage power station control system according to claim 2, characterized in that: The control layer includes a DCS redundant communication network, compressor system control layer equipment, compression side heat exchange system control layer equipment, heat storage system control layer equipment, in-plant auxiliary system control layer equipment, out-of-plant auxiliary system control layer equipment, expander system control layer equipment, and expansion side heat exchange system control layer equipment, which are respectively connected in parallel to the DCS redundant communication network.

4. A DCS-integrated compressed gas energy storage power station control system according to claim 3, characterized in that: The control layer further includes an off-site operator / engineer station, which is arranged in parallel in the off-site auxiliary system control layer equipment.

5. A DCS-integrated compressed gas energy storage power station control system according to claim 4, characterized in that: The on-site equipment layer includes on-site equipment of the compression side system, on-site equipment of the heat storage system and auxiliary workshop system, and on-site equipment of the expansion side system; the on-site equipment of the compression side system is respectively connected to the compressor system control layer equipment and the compression side heat exchange system control layer equipment; the on-site equipment of the heat storage system and auxiliary workshop system is respectively connected to the heat storage system control layer equipment, the in-plant auxiliary system control layer equipment, and the out-of-plant auxiliary system control layer equipment; the on-site equipment of the expansion side system is respectively connected to the expander system control layer equipment and the expansion side heat exchange system control layer equipment.

6. A DCS-integrated compressed gas energy storage power station control system according to claim 1, characterized in that: The control systems of the compressor and expander respectively adopt the same software and hardware as the DCS control system, and their controllers respectively adopt the high-performance redundant DPU of the DCS control system, which are directly connected to the redundant DCS control system communication network and establish a connection with the node through the DCS control system network. The control system monitoring layer equipment of the compressor and expander is uniformly set with the monitoring layer equipment of the DCS control system.

7. The DCS-integrated compressed gas energy storage power station control system according to claim 1, characterized in that: The heat storage and exchange system and the auxiliary workshop system are directly integrated into the DCS control system, and DPUs are allocated to them according to the principle of decentralization. Connections are established with nodes through the DCS control system network, and the monitoring layer equipment of the heat storage and exchange system and the auxiliary workshop control system are uniformly set with the monitoring layer equipment of the DCS control system.

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