Compressed air energy storage power station integrated control system based on NCS network architecture

Abstract

The utility model discloses a compressed air energy storage power station integrated control system based on an NCS network framework, and relates to the technical field of compressed air energy storage power station integrated control. The system comprises a spacing layer, a station control layer and a monitoring main network. The high-voltage power distribution device and generator-transformer group unit, the 10kV power distribution device unit, the 380V power distribution device unit, the compressor system control unit, the turbo expander system control unit, the heat storage and exchange and auxiliary system control unit, the operator work station, the engineer station, the five-prevention and training work station, the printer, the telecontrol work station and the system server are all connected to the monitoring main network. The AGC / AVC device is connected to a telecontrol work station. According to the utility model, the structure of two layers of equipment and one layer of network is adopted, the spacing layer equipment adopts a field bus as a control network, the station control layer adopts an Ethernet as a communication network among master station equipment, measurement and control and protection information share a monitoring network, and the monitoring main network adopts redundant dual networks, so that the reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of integrated control of compressed air energy storage power stations, and more specifically to an integrated control system of compressed air energy storage power stations based on an NCS network architecture. Background Art

[0002] The air compression energy storage power station is divided into the following systems: electrical system, compressor system, turbine expander system, thermal cycle system (heat exchange system and heat storage system) and auxiliary systems (air compression station, circulating water dosing, desalted water system, circulating water pump system, domestic water treatment, etc.).

[0003] The electrical system of a compressed air energy storage power station is similar to that of a conventional thermal power plant, including the booster station control system, the generator-transformer group and the station power control system. In a conventional thermal power plant, the booster station is monitored by the NCS system, the generator-transformer group is incorporated into the DCS system, and the station power system is monitored by the ECMS system.

[0004] Compressed air energy storage power station is a new application scenario for large compressors. It currently has a mature control system (CCS) with built-in corresponding compressor control algorithms (anti-surge control algorithm, performance control algorithm, decoupling algorithm, etc.) to achieve automated operation of the compressor unit.

[0005] The turbine of a compressed air energy storage power station is similar to the steam turbine of a conventional thermal power plant, and its control is mainly achieved by the digital electro-hydraulic control system (DEH) provided by the turbine manufacturer.

[0006] The heat storage, exchange and auxiliary systems of the compressed air energy storage power station are similar to the corresponding systems of conventional thermal power plants, and their control is mainly achieved by DCS.

[0007] Compressed air energy storage technology uses compressed air to store energy. The power grid has requirements for its control system such as high flexibility, rapid response, and bidirectional adjustment, and places very high demands on the power station control system.

[0008] Based on this feature, the friendliness of the compressed air energy storage power station and the dispatching interface is particularly important.

[0009] Therefore, it is necessary to develop an integrated control system for compressed air energy storage power stations based on the NCS network architecture, which is convenient for unified management of the entire station, friendly with the dispatching interface, and meets the dispatching function of the power grid to the power station. Summary of the invention

[0010] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and to provide an integrated control system for a compressed air energy storage power station based on an NCS network architecture.

[0011] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: an integrated control system of a compressed air energy storage power station based on the NCS network architecture, characterized in that: it includes an interval layer, a station control layer and a monitoring main network, and the interval layer equipment includes a high-voltage distribution device and a generator-transformer unit, a 10kV distribution device unit, a 380V distribution device unit, a compressor system control unit, a turbine expander system control unit, a heat storage and auxiliary system control unit and an AGC / AVC device;

[0012] The station control layer equipment includes operator workstation, engineer station, five-defense and training workstation, printer and telecontrol workstation, and system server;

[0013] The high-voltage power distribution device and generator-transformer unit, 10kV power distribution device unit, 380V power distribution device unit, compressor system control unit, turbine expander system control unit, heat storage and auxiliary system control unit, operator workstation, engineer station, five-defense and training workstation, printer, telecontrol workstation, and system server are all connected to the monitoring main network;

[0014] The AGC / AVC device is connected to a telecontrol workstation.

[0015] In the above technical solution, the main monitoring network adopts redundant dual networks.

[0016] In the above technical solution, the measurement and control devices and protection devices of the high-voltage power distribution device and the generator-transformer unit are all connected to the monitoring main network through their own Ethernet interfaces.

[0017] In the above technical solution, the comprehensive protection and measurement and control device of the 10kV power distribution device unit is connected to the monitoring main network through an Ethernet switch.

[0018] In the above technical solution, the intelligent measurement and control device and the motor controller of the 380V power distribution device unit are connected to the monitoring main network through the communication management machine.

[0019] In the above technical solution, the compressor system control unit is connected to the monitoring main network through the first communication interface machine, the turbine expander system control unit is connected to the monitoring main network through the second communication interface machine, and the heat storage and auxiliary system control unit is connected to the monitoring main network through the third communication interface machine.

[0020] In the above technical solution, the AGC / AVC device is connected to the remote control host through the AGC / AVC host computer, and the remote control host is connected to the monitoring main network.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] 1) The utility model adopts a two-layer device (interval layer, station control layer) and one-layer network structure. The interval layer device adopts field bus as the control network, and the station control layer adopts Ethernet as the communication network between the main station devices. The measurement and control and protection information share the monitoring network, and the monitoring main network adopts redundant dual networks to improve reliability.

[0023] 2) The utility model can unify the compressed air energy storage power station onto the same control platform, facilitating the unified management of the entire station, and is also friendly to the dispatching interface, satisfying the dispatching function of the power grid to the power station.

[0024] 3) The compressor control system, turbine expander control system, heat storage and auxiliary control system in the utility model are all based on existing technologies. The NCS measurement and control device function can be developed in the future to unify the control hardware of all systems in the station on the same platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a system schematic diagram of the utility model.

[0026] Among them, 1-interval layer, 11-high-voltage power distribution device and generator-transformer unit, 111-measurement and control unit, 112-protection device, 12-10kV power distribution device unit, 121-comprehensive protection and measurement and control device, 13-380V power distribution device unit, 131-intelligent measurement and control device, 132-motor controller, 14-compressor system control unit, 15-turbine expander system control unit, 16-heat storage and auxiliary system control unit, 17-AGC / AVC device, 181-Ethernet switch, 18 2-communication management machine, 2-station control layer, 21-operator workstation, 22-engineer station, 23-five-prevention and training workstation, 24-printer, 241-printer server, 25-telecontrol workstation, 251-AGC / AVC host computer, 252-telecontrol host, 26-system server, 271-first communication interface machine, 272-second communication interface machine, 273-third communication interface machine, 28-clock source, 3-monitoring main network, 41-provincial dispatching data network, 42-local dispatching data network. DETAILED DESCRIPTION

[0027] The following is a detailed description of the implementation of the utility model in conjunction with the accompanying drawings, but they do not constitute a limitation of the utility model and are only used as examples. At the same time, the advantages of the utility model will become clearer and easier to understand through the description.

[0028] See attached Figure 1It can be seen that: an integrated control system of a compressed air energy storage power station based on the NCS network architecture is characterized by: comprising an interval layer 1, a station control layer 2 and a monitoring main network 3, the equipment of the interval layer 1 includes a high-voltage distribution device and a generator-transformer unit 11, a 10kV distribution device unit 12, a 380V distribution device unit 13, a compressor system control unit 14, a turbine expander system control unit 15, a heat storage and auxiliary system control unit 16 and an AGC / AVC device 17;

[0029] The equipment of the station control layer 2 includes an operator workstation 21, an engineer station 22, a five-defense and training workstation 23, a printer 24, a telecontrol workstation 25, and a system server 26;

[0030] The high-voltage power distribution device and generator-transformer unit 11, 10kV power distribution device unit 12, 380V power distribution device unit 13, compressor system control unit 14, turbine expander system control unit 15, heat storage and auxiliary system control unit 16, operator workstation 21, engineer station 22, five-defense and training workstation 23, printer 24, telecontrol workstation 25, system server 26 are all connected to the monitoring main network 3;

[0031] The printer 24 is connected to the monitoring main network 3 through the printer server 241; the operator workstation 21, the engineer station 22, the five-defense and training workstation 23, the measurement and control unit 111, the protection device 112, the compressor system control unit 14, the turbine expander system control unit 15, the heat storage and auxiliary system control unit 16 are all connected to the clock source 28 for time synchronization; the 10kV power distribution device unit 12 and the 380V power distribution device unit 13 are synchronized through the system server 26 using the network;

[0032] The compressor system control unit 14, the turbine expander system control unit 15, and the heat storage and auxiliary system control unit 16 are all equipped with corresponding operator stations.

[0033] The AGC / AVC device 17 is connected to the remote control workstation 25 .

[0034] The monitoring main network 3 adopts redundant dual networks.

[0035] The measurement and control device 111 and the protection device 112 of the high-voltage power distribution device and the generator-transformer unit 11 are all connected to the monitoring main network 3 through their own Ethernet interfaces.

[0036] The comprehensive protection and measurement and control device 121 of the 10kV power distribution device unit 12 is connected to the monitoring main network 3 through the Ethernet switch 181.

[0037] The intelligent measurement and control device 131 and the motor controller 132 of the 380V power distribution device unit 13 are both connected to the monitoring main network 3 through the communication management machine 182.

[0038] The compressor system control unit 14 is connected to the monitoring main network 3 through the first communication interface machine 271, the turbine expander system control unit 15 is connected to the monitoring main network 3 through the second communication interface machine 272, and the heat storage and auxiliary system control unit 16 is connected to the monitoring main network 3 through the third communication interface machine 273.

[0039] The AGC / AVC device 17 is connected to the remote control host 252 through the AGC / AVC host computer 251, and the remote control host 252 is connected to the monitoring main network 3; the collection and transmission of remote control information and AGC / AVC are realized through the remote control host 252 with redundant configuration of the station control layer 2; the remote control host 252 is connected to the provincial dispatching data network 41 and the local dispatching data network 42.

[0040] Other parts not described belong to the prior art.

Claims

1. An integrated control system for a compressed air energy storage power station based on an NCS network architecture, characterized in that: It comprises an interval layer (1), a station control layer (2) and a monitoring main network (3), wherein the equipment of the interval layer (1) comprises a high-voltage power distribution device and a generator-transformer unit (11), a 10 kV power distribution device unit (12), a 380 V power distribution device unit (13), a compressor system control unit (14), a turbine expander system control unit (15), a heat storage and exchange and auxiliary system control unit (16) and an AGC / AVC device (17); The equipment of the station control layer (2) includes an operator workstation (21), an engineer station (22), a five-defense and training workstation (23), a printer (24), a remote control workstation (25), and a system server (26); The high-voltage power distribution device and generator-transformer unit (11), 10 kV power distribution device unit (12), 380 V power distribution device unit (13), compressor system control unit (14), turbine expander system control unit (15), heat storage and auxiliary system control unit (16), operator workstation (21), engineer station (22), five-defense and training workstation (23), printer (24), telecontrol workstation (25), and system server (26) are all connected to the monitoring main network (3); The AGC / AVC device (17) is connected to a remote control workstation (25).

2. According to claim 1, a compressed air energy storage power station integrated control system based on NCS network architecture is characterized in that: The main monitoring network (3) adopts a redundant dual network.

3. According to claim 1, a compressed air energy storage power station integrated control system based on NCS network architecture is characterized in that: The measurement and control device (111) and the protection device (112) of the high-voltage power distribution device and the generator-transformer unit (11) are all connected to the monitoring main network (3) through the Ethernet interface provided by the device.

4. According to claim 1, a compressed air energy storage power station integrated control system based on NCS network architecture is characterized in that: The comprehensive protection and measurement and control device (121) of the 10kV power distribution device unit (12) is connected to the monitoring main network (3) via an Ethernet switch (181).

5. According to claim 1, a compressed air energy storage power station integrated control system based on NCS network architecture is characterized in that: The intelligent measurement and control device (131) and the motor controller (132) of the 380V power distribution device unit (13) are both connected to the monitoring main network (3) via the communication management machine (182).

6. According to claim 1, a compressed air energy storage power station integrated control system based on NCS network architecture is characterized in that: The compressor system control unit (14) is connected to the monitoring main network (3) via a first communication interface machine (271), the turbine expander system control unit (15) is connected to the monitoring main network (3) via a second communication interface machine (272), and the heat storage and auxiliary system control unit (16) is connected to the monitoring main network (3) via a third communication interface machine (273).

7. According to claim 1, a compressed air energy storage power station integrated control system based on NCS network architecture is characterized in that: The AGC / AVC device (17) is connected to a remote control host (252) via an AGC / AVC host computer (251), and the remote control host (252) is connected to a monitoring main network (3).

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