Electrical monitoring system of compressed air energy storage and electrochemical energy storage hybrid energy storage power station

Abstract

The invention relates to the technical field of electrical monitoring systems, and discloses an electrical monitoring system of a compressed air energy storage and electrochemical energy storage hybrid energy storage power station, the electrical monitoring system is an integrated electrical equipment monitoring platform, and the electrical monitoring system comprises a station level control layer, a network communication layer and an interval equipment layer which are connected in sequence, the station-level control layer is used for receiving an external control instruction, collecting operation data of electrical equipment in the hybrid energy storage power station in real time, and sending a control adjustment instruction to the interval equipment layer based on the external control instruction and the operation data; and the interval equipment layer is used for monitoring the operation state of the corresponding electrical equipment in the hybrid energy storage power station based on the control adjustment instruction of the station-level control layer and adjusting the operation state. Information resource integration of the electrical monitoring system of the hybrid energy storage power station is realized, a unified monitoring platform is provided for operation and maintenance personnel, the operation and maintenance work is simplified, and the operation and maintenance efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical monitoring systems, and in particular to an electrical monitoring system for a compressed air energy storage and electrochemical energy storage hybrid energy storage power station. Background Art

[0002] The monitoring objects of the electrical system of a hybrid energy storage power station with compressed air energy storage and electrochemical energy storage generally include: (1) turbine generator set control and protection system; (2) high-voltage plant power supply and motor system; (3) low-voltage plant power supply and motor system; (4) other plant power supply systems; (5) electrochemical energy storage equipment; (6) booster station measurement, control and protection system. According to current industry practices, the electrical equipment of a hybrid energy storage power station is monitored in the following monitoring systems:

[0003] For monitoring objects (1) to (4), there are usually two monitoring methods in the industry: Method A: monitoring in a thermal distributed control system (DCS) or fieldbus control system (FCS); Method B: setting up a dedicated plant power monitoring and management system (ECMS) and monitoring in the ECMS. Generator measurement, control and protection devices (a subset of (1)) are generally monitored in the booster station network monitoring system (NCS).

[0004] For the monitoring object (5), an independent energy management system (EMS) is usually set up to realize monitoring.

[0005] For the monitoring object (6), a booster station network monitoring system (Net Control System, NCS) is usually set up to achieve monitoring.

[0006] The existing monitoring system configuration methods in the industry have the following disadvantages:

[0007] (1) There are multiple electrical monitoring systems in the entire station, such as DCS (or FCS), ECMS, EMS, and NCS. Electrical operation and maintenance personnel need to monitor different electrical equipment on multiple platforms, which increases the workload of operation and maintenance and reduces the efficiency of operation and maintenance.

[0008] (2) The DCS or FCS monitoring systems used in monitoring objects (1) to (4) are control systems developed for thermal process control. They are difficult to achieve, such as comprehensive display of the operating status, protection actions, settings, accident recall, and energy metering of electrical equipment, and are difficult to achieve advanced application functions such as electrical control, electrical diagnosis, predictive maintenance, and analysis.

[0009] (3) The DCS monitoring system used for monitoring objects (1) to (4) usually requires a large number of hard-wired cables, which requires a large amount of design and on-site installation and debugging work and is not conducive to engineering cost control. (4) Different electrical equipment is monitored in different systems, which leads to poor resource integration and difficulty in achieving coordinated management. Taking the "five-defense" function as an example, the NCS system is usually equipped with a microcomputer five-defense system to realize the "five-defense" function of electrical equipment. However, due to the information isolation between different platforms, electrical equipment monitored by the DCS and EMS systems cannot be uniformly managed by the microcomputer five-defense system. Summary of the invention

[0010] Therefore, the technical problem to be solved by the present invention is to solve the problem in the prior art that multiple electrical systems of a hybrid energy storage power station cannot be centrally and efficiently monitored, thereby providing an electrical monitoring system for a hybrid energy storage power station of compressed air energy storage and electrochemical energy storage.

[0011] In order to achieve the above object, the present invention provides the following technical solutions:

[0012] The present invention provides an electrical monitoring system for a hybrid energy storage power station of compressed air energy storage and electrochemical energy storage. The electrical monitoring system is an integrated electrical equipment monitoring platform. The electrical monitoring system includes: a station-level control layer, a network communication layer and an interval device layer connected in sequence, wherein the station-level control layer is used to receive control instructions and collect the operating data of the electrical equipment in the hybrid energy storage power station in real time, and then perform integrated monitoring on the interval device layer based on the control instructions and the operating data, and send control adjustment instructions to the interval device layer; the network communication layer is used to realize protocol conversion and data transmission between the station-level control layer and the interval device layer; the interval device layer is used to monitor the operating status of the corresponding electrical equipment in the hybrid energy storage power station and adjust the operating status based on the control adjustment instructions of the station-level control layer.

[0013] The electrical monitoring system of the compressed air energy storage and electrochemical energy storage hybrid energy storage power station provided by the present invention adopts a unified electrical equipment monitoring platform. The station-level control layer can fully display the operating status, protection action, setting, accident recall, power metering and other information of the electrical equipment, and realize electrical control, electrical diagnosis, predictive maintenance, analysis and other advanced application functions in combination with the interval equipment layer. The electrical system of the entire station is unified to an integrated monitoring platform for monitoring, avoiding the splitting of the electrical system into multiple monitoring platforms such as NCS, DCS (or FCS), ECMS, EMS, etc., realizing the integration of information resources, providing a unified monitoring platform for operation and maintenance personnel, simplifying the operation and maintenance work, and improving the operation and maintenance efficiency.

[0014] In an optional embodiment, the interval equipment layer includes: a turbine generator set measurement and control system, a high-voltage plant power supply and motor measurement and control system, a low-voltage plant power supply and motor measurement and control system, an electrochemical energy storage device measurement and control system, a booster station measurement and control system and other plant power supply measurement and control systems, wherein the turbine generator set measurement and control system, the high-voltage plant power supply and motor measurement and control system, the low-voltage plant power supply and motor measurement and control system, the electrochemical energy storage device measurement and control system, the booster station measurement and control system and other plant power supply measurement and control systems are all connected to the station-level control layer through the network communication layer; the turbine generator set measurement and control system is used to monitor and control the working status of the turbine generator and its excitation system based on the control instructions of the station-level control layer; the high-voltage plant power supply and motor measurement and control system is used to monitor and control the working status of the turbine generator and its excitation system based on the control instructions of the station-level control layer The control instructions are used to monitor and control the working status of the compressed air energy storage high-voltage plant power supply system and the compressed air energy storage high-voltage motor system; the low-voltage plant power supply and motor measurement and control system is used to monitor and control the working status of the compressed air energy storage low-voltage plant power supply system and the compressed air energy storage low-voltage motor system based on the control instructions of the station-level control layer; the electrochemical energy storage equipment measurement and control system is used to monitor and control the working status of the electrochemical energy storage equipment based on the control instructions of the station-level control layer; the booster station measurement and control system is used to monitor and control the working status of each electrical primary equipment in the booster station based on the control instructions of the station-level control layer; other plant power supply measurement and control systems are used to monitor and control the working status of other electrical equipment in the hybrid energy storage power station based on the control instructions of the station-level control layer.

[0015] The electrical monitoring system of the compressed air energy storage and electrochemical energy storage hybrid energy storage power station provided by the present invention sets up six types of measurement and control systems for all electrical equipment according to the types of electrical equipment in the hybrid energy storage power station, and monitors and integrates the working parameters of all electrical equipment at the station-level control layer to achieve unified monitoring, improve operation and maintenance efficiency, and realize the integrity of the functional management of electrical equipment in the entire station.

[0016] In an optional embodiment, the turbine generator set measurement and control system includes: an excitation regulator, a turbine generator measurement and control device and a turbine generator protection device, wherein the excitation regulator, the turbine generator measurement and control device and the turbine generator protection device are all connected to the station-level control layer through the network communication layer, and the excitation regulator, the turbine generator measurement and control device and the turbine generator protection device are also connected to the turbine generator set; the turbine generator measurement and control device is used to measure and control the working state of the turbine generator set based on the control instructions of the station-level control layer; the turbine generator protection device is used to protect the turbine generator set and feedback protection information to the station-level control layer; the excitation regulator is used to adjust the excitation current of the turbine generator set and adjust the reactive power of the turbine generator set based on the control instructions of the station-level control layer.

[0017] In an optional embodiment, the electrochemical energy storage device measurement and control system includes: an energy storage coordination controller, multiple energy storage battery management systems and multiple energy storage inverter controllers, wherein each energy storage battery management system and each energy storage inverter controller are connected to the station-level control layer through the energy storage coordination controller and the network communication layer, and each energy storage battery management system and each energy storage inverter controller are also connected to an electrochemical energy storage device respectively; the energy storage battery management system is used to monitor and manage the operating status of the energy storage battery, and adjust the charging and discharging process of each electrochemical energy storage device based on the control instructions of the station-level control layer; the energy storage coordination controller is used to allocate power output values ​​to each energy storage inverter controller based on the control instructions of the station-level control layer and in combination with the operating status of the energy storage battery fed back by the station-level control layer; the energy storage inverter controller is used to control the power output of each energy storage inverter.

[0018] In an optional embodiment, the high-voltage plant power supply and motor measurement and control system includes: multiple power supply comprehensive protection and measurement and control devices and multiple motor comprehensive protection and measurement and control devices, wherein each power supply comprehensive protection and measurement and control device is connected to the station-level control layer through a network communication layer, and each power supply comprehensive protection and measurement and control device is also respectively connected to a high-voltage plant power supply, and the power supply comprehensive protection and measurement and control device is used to monitor the working parameters of the power supply connected thereto, and adjust and control the working parameters of the power supply based on the control instructions of the station-level control layer; each motor comprehensive protection and measurement and control device is connected to the station-level control layer through a network communication layer, and each motor comprehensive protection and measurement and control device is also respectively connected to a high-voltage motor and a thermal distributed control system, and the motor comprehensive protection and measurement and control device is used to monitor the working state of the high-voltage motor, and control the working state of the high-voltage motor connected thereto based on the control instructions of the station-level control layer and the thermal logic signals of the thermal distributed control system.

[0019] In an optional embodiment, the low-voltage plant power supply and motor measurement and control system includes: an intelligent switch, a motor controller and an intelligent instrument, wherein the intelligent switch, the motor controller and the intelligent instrument are all connected to the station-level control layer through the network communication layer, and the intelligent switch, the motor controller and the intelligent instrument are also respectively connected to each low-voltage plant power supply or each low-voltage motor, and the motor controller is also connected to the thermal distributed control system; the intelligent switch is used to control the switch state of the low-voltage plant power supply based on the control instructions of the station-level control layer, and monitor the electrical quantities of the low-voltage plant power supply; the motor controller is used to control the operating state of the corresponding low-voltage motor based on the control instructions of the station-level control layer and the thermal logic signals of the thermal distributed control system; the intelligent instrument is used to monitor the operating parameters of each low-voltage plant power supply, and / or each low-voltage motor.

[0020] In an optional embodiment, the substation measurement and control system includes: multiple bus measurement and control protection systems, multiple line measurement and control protection systems and multiple transformer measurement and control protection systems, wherein each bus measurement and control protection system, line measurement and control protection system and transformer measurement and control protection system are connected to the station-level control layer through a network communication layer; the bus measurement and control protection system is used to monitor the operating status of the bus equipment in the substation, and to control and protect the bus equipment; the line measurement and control protection system is used to monitor the operating status of the line equipment in the substation, and to control and protect the line equipment; the transformer measurement and control protection system is used to monitor the operating status of the transformer, and to control and protect the transformer equipment.

[0021] In an optional implementation, the station-level control layer includes: an integrated electrical monitoring server, an automatic power generation controller, an automatic voltage controller, a microcomputer five-protection system, an operator station, and an engineer station, wherein the integrated electrical monitoring server, the automatic power generation controller, the automatic voltage controller, the microcomputer five-protection system, the operator station, and the engineer station are all connected to the interval equipment layer through the network communication layer; the automatic power generation controller is also connected to the thermal distributed control system and the dispatching data network, which is used to receive the active power target instructions issued by the dispatching data network, allocate the compressed air energy storage active output value to the thermal distributed control system, and transmit the compressed air energy storage active output value to the thermal distributed control system through the network. The network communication layer allocates active output values ​​to the electrochemical energy storage system; the automatic voltage controller is also connected to the excitation regulator, thermal distributed control system and dispatching data network, and is used to receive reactive target value instructions or grid high-voltage bus voltage instructions issued by the dispatching data network, adjust the working state of the excitation regulator, and thus adjust the reactive output of the turbine generator. In addition, the reactive output value is allocated to the electrochemical energy storage equipment measurement and control system through the network communication layer; the integrated electrical monitoring server is used to monitor the working state of electrical equipment in the hybrid energy storage power station; the microcomputer five-defense system is used to perform five-defense operation management on the electrical equipment in the hybrid energy storage power station.

[0022] In an optional embodiment, the integrated electrical monitoring server integrates one or more of electrochemical energy storage management software, booster station electrical information monitoring software, compressed air energy storage monitoring software, turbine generator set monitoring software, plant power and motor system monitoring software, electrical system analysis and diagnosis software, and predictive maintenance software.

[0023] In an optional embodiment, the network communication layer includes: Ethernet and multiple communication servers, wherein the turbine generator set measurement and control system, the low-voltage plant power supply and motor measurement and control system and other plant power supply measurement and control systems are all connected to the station-level control layer through the communication server and Ethernet; the communication server and Ethernet are connected to the station-level control layer; the high-voltage plant power supply and motor measurement and control system and the booster station measurement and control system are all connected to the station-level control layer through Ethernet.

[0024] The electrical monitoring system of the compressed air energy storage and electrochemical energy storage hybrid energy storage power station provided by the present invention avoids the splitting of the electrical system into multiple monitoring platforms such as NCS, DCS (or FCS), ECMS, EMS, etc., realizes the integration of information resources, provides a unified monitoring platform for operation and maintenance personnel, simplifies operation and maintenance work, and improves operation and maintenance efficiency; in addition, network communication is adopted between the various layers of the electrical equipment monitoring platform, which can save a large amount of cable materials compared with DCS monitoring and simplifies design and construction work. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural diagram of the electrical main system of a compressed air energy storage and electrochemical energy storage hybrid energy storage power station according to an embodiment of the present invention;

[0027] Figure 2 is a composition diagram of a specific example of an electrical monitoring system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described clearly and completely below 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Regarding the monitoring method of electrical equipment in a hybrid energy storage power station, the electrical system is usually split into multiple monitoring platforms such as NCS, DCS (or FCS), ECMS, EMS, etc., and different electrical systems are monitored on multiple platforms, resulting in a large workload and low efficiency of operation and maintenance. In addition, it is difficult for a DCS or FCS system to fully display information such as the operating status, protection action, setting, accident recall, and electric energy metering of electrical equipment, and it is difficult to achieve advanced application functions such as electrical control, electrical diagnosis, predictive maintenance, and analysis. In addition, the DCS monitoring system requires a large number of hard-wired cables for connection, and the workload of design and on-site installation and commissioning is large, and it is not conducive to engineering cost control. For this reason, this embodiment provides an electrical monitoring system for a hybrid energy storage power station of compressed air energy storage and electrochemical energy storage, and the electrical monitoring system is an integrated electrical equipment monitoring platform.

[0033] Figure 1 A main electrical system structure diagram of a hybrid energy storage power station is provided for this embodiment. The booster station aggregates and boosts the electrical energy in the turbine generator and its excitation system, high-voltage plant power supply, high-voltage motor (including compressor), low-voltage plant power supply, low-voltage motor and electrochemical energy storage system.

[0034] like Figure 2As shown, for the above equipment, the electrical monitoring system of this embodiment includes: a station-level control layer 1, a network communication layer 2 and a spacing device layer 3 which are connected in sequence.

[0035] Figure 2 In the system, the station-level control layer 1 is used to receive control instructions and collect the operating data of electrical equipment in the hybrid energy storage power station in real time, and then perform integrated monitoring of the interval equipment layer 3 based on the control instructions and operating data, and send control adjustment instructions to the interval equipment layer 3. The station-level control layer 1 includes an integrated electrical monitoring server, an operator station, an engineer station, a five-defense workstation, an AVC / AGC controller, etc.

[0036] Specifically, Figure 2 In the station-level control layer 1, an engineer station and an operator station are set up. Engineers and operators can use the equipment in the engineer station and the operator station to issue control instructions, collect and store data of the entire station in real time, monitor the electrical equipment of the entire station in real time, remotely control and operate the five-prevention system, perform data statistics, and query and print reports.

[0037] Figure 2 In the network communication layer 2, the protocol conversion and data transmission between the station-level control layer 1 and the interval device layer 3 are realized.

[0038] Optionally, Figure 2 In the network communication layer 2, the network communication layer 2 may include Ethernet, network switches, communication servers and other equipment. All equipment such as the station-level control layer 1, the interval equipment layer 3, and the monitoring object are connected through the network equipment in the network communication layer 2. No hard wiring connection is set, which saves a lot of cable materials and simplifies the design and construction work.

[0039] Figure 2 In the example, the interval equipment layer 3 is used to monitor and adjust the operating status of the corresponding electrical equipment in the hybrid energy storage power station based on the control and adjustment instructions of the station-level control layer 1.

[0040] Specifically, Figure 2 In the process, after the electrical equipment of the entire station is classified as monitoring objects, corresponding measurement and control systems are set up in the interval equipment layer 3 respectively. Each measurement and control system receives the control and adjustment instructions sent by the station-level control layer 1, and adjusts the working status and measures the working parameters of the connected monitoring objects based on the control and adjustment instructions.

[0041] Optionally, Figure 2The station-level control layer includes an integrated electrical monitoring server, operator station, engineer station, five-defense workstation, AVC / AGC controller, etc. The electrical monitoring application software is integrated in the integrated electrical monitoring server, operator station, and engineer station. The software at least includes electrochemical energy storage energy management, booster station electrical information monitoring, compressed air energy storage turbine generator set monitoring, plant power and motor system monitoring, electrical system analysis and diagnosis, predictive maintenance and other functional modules.

[0042] The electrical monitoring system of the hybrid energy storage power station provided in this embodiment adopts a unified electrical equipment monitoring platform. The station-level control layer can fully display the operating status, protection action, setting, accident recall, power metering and other information of the electrical equipment, and realize electrical control, electrical diagnosis, predictive maintenance, analysis and other advanced application functions in combination with the interval equipment layer. The electrical system of the entire station is unified to an integrated monitoring platform for monitoring, avoiding the splitting of the electrical system into multiple monitoring platforms such as NCS, DCS (or FCS), ECMS, EMS, etc., realizing the integration of information resources, providing a unified monitoring platform for operation and maintenance personnel, simplifying the operation and maintenance work, and improving the operation and maintenance efficiency.

[0043] In some optional embodiments, such as Figure 2 As shown, the interval equipment layer 3 includes: a turbine generator set measurement and control system 31, a high-voltage plant power supply and motor measurement and control system 32, a low-voltage plant power supply and motor measurement and control system 33, an electrochemical energy storage equipment measurement and control system 34, a booster station measurement and control system 35 and other plant power supply measurement and control systems 36, wherein the turbine generator set measurement and control system 31, the high-voltage plant power supply and motor measurement and control system 32, the low-voltage plant power supply and motor measurement and control system 33, the electrochemical energy storage equipment measurement and control system 34, the booster station measurement and control system 35 and other plant power supply measurement and control systems 36 are all connected to the station-level control layer 1 through the network communication layer 2.

[0044] Figure 2 In the embodiment, the turbine generator set measurement and control system 31 is used to monitor and control the working status of the turbine generator and its excitation system based on the control instructions of the station-level control layer 1.

[0045] Specifically, Figure 2 In the figure, the turbine generator set measurement and control system 31 includes: an excitation regulator 311, a turbine generator measurement and control device 312 and a turbine generator protection device 313, wherein the excitation regulator 311, the turbine generator measurement and control device 312 and the turbine generator protection device 313 are all connected to the station-level control layer 1 through the network communication layer 2, and the excitation regulator 311, the turbine generator measurement and control device 312 and the turbine generator protection device 313 are also connected to the turbine generator set.

[0046] Specifically, Figure 2In the embodiment, the turbine generator measurement and control device 312 is used to measure and control the working state of the turbine generator set based on the control instructions of the station-level control layer 1; the turbine generator protection device 313 is used to protect the turbine generator set and feedback protection information to the station-level control layer 1; the excitation regulator 311 is used to adjust the excitation current of the turbine generator set and adjust the reactive power of the turbine generator set based on the control instructions of the station-level control layer 1. The turbine generator measurement and control device 312 and the turbine generator protection device 313 preferably use standard protocol devices and directly communicate with the station-level control layer 1 equipment through the network.

[0047] Optionally, Figure 2 In the present invention, the turbine generator set measurement and control system 31 also includes a synchronization device 314 and a plant power quick-cut device 315, both of which are connected to the turbine generator set and the high-voltage plant power supply system respectively. Both can switch the working state based on the monitoring and adjustment instructions of the station-level control layer, thereby realizing the synchronization grid connection and plant power quick switching functions of the turbine generator set.

[0048] Figure 2 In the middle, the high-voltage plant power supply and motor measurement and control system 32 is used to monitor and control the working status of the compressed air energy storage high-voltage plant power supply system and the compressed air energy storage high-voltage motor system based on the control instructions of the station-level control layer 1.

[0049] Specifically, Figure 2 In the embodiment, the high-voltage plant power supply and motor measurement and control system 32 includes: a plurality of power supply integrated protection measurement and control devices 321 and a plurality of motor integrated protection measurement and control devices 322, wherein each power supply integrated protection measurement and control device is connected to the station-level control layer 1 through the network communication layer 2, and each power supply integrated protection measurement and control device 321 is also respectively connected to a high-voltage plant power supply, and the power supply integrated protection measurement and control device 321 is used to monitor the working parameters of the power supply connected thereto, and adjust and control the working parameters of the power supply based on the control instructions of the station-level control layer 1; each motor integrated protection measurement and control device 322 is connected to the station-level control layer 1 through the network communication layer 2, and each motor integrated protection measurement and control device 322 is also respectively connected to a high-voltage motor and a thermal distributed control system DCS, and the motor integrated protection measurement and control device 322 is used to monitor the working state of the high-voltage motor, and control the working state of the high-voltage motor connected thereto based on the control instructions of the station-level control layer 1 and the thermal logic signals of the thermal distributed control system DCS.

[0050] Specifically, Figure 2In the example, each power integrated protection and measurement and control device 321 is used to measure and control a compressed air energy storage high-voltage plant power supply system based on the monitoring and adjustment instructions of the station-level control layer 1, and each motor integrated protection and measurement and control device 322 is used to measure and control a compressed air energy storage high-voltage motor system (including compressor) based on the control and adjustment instructions of the station-level control layer 1. The signals of the motor class participating in the thermal logic are reserved for the hard wiring of the thermal distributed control system DCS to achieve high-resolution and fast transmission of signals.

[0051] Figure 2 In the embodiment, the low-voltage plant power supply and motor measurement and control system 33 is used to monitor and control the working status of the compressed air energy storage low-voltage plant power supply system and the compressed air energy storage low-voltage motor system based on the control instructions of the station-level control layer 1.

[0052] Specifically, Figure 2 In the figure, the low-voltage plant power supply and motor measurement and control system 33 includes: an intelligent switch 331, a motor controller 332 and an intelligent instrument 333, wherein the intelligent switch 331, the motor controller 332 and the intelligent instrument 333 are all connected to the station-level control layer through the network communication layer, and the intelligent switch 331, the motor controller 332 and the intelligent instrument 333 are also respectively connected to each low-voltage plant power supply or each low-voltage motor, and the motor controller 332 is also connected to the thermal distributed control system DCS; the intelligent switch 331 is used to control the switch state of the low-voltage plant power supply based on the control instruction of the station-level control layer 1, and monitor the electrical quantity of the low-voltage plant power supply; the motor controller 332 is used to control the operating state of the corresponding low-voltage motor based on the control instruction of the station-level control layer 1 and the thermal logic signal of the thermal distributed control system DCS; the intelligent instrument 333 is used to monitor the working parameters of each low-voltage plant power supply and / or each low-voltage motor.

[0053] Specifically, Figure 2 In the system, each intelligent switch 331 and motor controller 332 are used to control a compressed air energy storage low-voltage motor system based on the monitoring and adjustment instructions of the station-level control layer 1, and adjust the output and other working parameters of the motor. The intelligent instrument 333 monitors the working status of the motor system and the compressed air energy storage low-voltage plant power supply system. The signals of the motor participating in the thermal logic are retained to the hard wiring of the thermal distributed control system DCS, so as to realize high-resolution and rapid transmission of the signal.

[0054] Optionally, Figure 2 In the figure, the number of intelligent switches 331, motor controllers 332 and intelligent meters 333 corresponds to the number of compressed air energy storage low-voltage plant power supply systems and compressed air energy storage low-voltage motor systems.

[0055] Figure 2In the embodiment, the electrochemical energy storage device measurement and control system 34 is used to monitor and control the working state of the electrochemical energy storage device based on the control instructions of the energy management system in the station-level control layer 1.

[0056] Specifically, Figure 2 In the embodiment, the electrochemical energy storage device measurement and control system 34 includes: multiple energy storage battery management systems 341, multiple energy storage inverter controllers 342 and energy storage coordination controllers 343, wherein each energy storage battery management system 341 and each energy storage inverter controller 342 are connected to the station-level control layer 1 through the energy storage coordination controller 343 and the network communication layer 2, and each energy storage battery management system 341 and each energy storage inverter controller 342 are also connected to an electrochemical energy storage device respectively; the energy storage battery management system 341 is used to monitor and manage the operating status of the energy storage battery, and adjust the charging and discharging process of each electrochemical energy storage device based on the superior control instruction; the energy storage coordination controller 343 is used to allocate power output values ​​to each energy storage inverter controller 342 based on the control instructions of the station-level control layer 1 and in combination with the operating status of the energy storage battery fed back by the station-level control layer 1; the energy storage inverter controller 342 is used to control the power output of the energy storage inverter based on the control instructions of the energy storage coordination controller 343.

[0057] Optionally, the electrochemical energy storage device measurement and control system 34 also includes a transformer measurement and control 344, which is connected to the transformer for real-time monitoring, precise measurement, automatic control and fault protection of the transformer.

[0058] Figure 2 In the booster station measurement and control system 35, based on the control instructions of the booster station network monitoring system in the station-level control layer 1, the working status of each electrical primary equipment in the booster station is monitored and controlled.

[0059] Specifically, Figure 2 In the figure, the booster station measurement and control system 35 includes: multiple bus measurement and control protection systems 351, multiple line measurement and control protection systems 352 and multiple transformer measurement and control protection systems 353, wherein each bus measurement and control protection system 351, line measurement and control protection system 352 and transformer measurement and control protection system 353 are connected to the station-level control layer 1 through the network communication layer 2, and each bus measurement and control protection system 351, line measurement and control protection system 352 and transformer measurement and control protection system 353 are also respectively connected to a bus device, a line device, and a transformer; the bus measurement and control protection system 351 is used to monitor the operating status of the bus device in the booster station, and control and protect the bus device; the line measurement and control protection system 352 is used to monitor the operating status of the line equipment in the booster station, and control and protect the line equipment; the transformer measurement and control protection system 353 is used to monitor the operating status of the transformer, and control and protect the transformer equipment.

[0060] Specifically, the booster station includes various primary electrical equipment, and the control and protection of the primary electrical equipment is achieved by setting up special devices, such as main transformer measurement and control devices, busbar measurement and control devices, line measurement and control devices, main transformer protection devices, busbar protection devices, line protection devices, etc. The above devices all belong to the booster station measurement and control system 35.

[0061] Figure 2 In the example, the other plant power supply measurement and control system 36 is used to monitor and control the working status of other electrical equipment in the hybrid energy storage power station based on the control instructions of the station-level control layer 1.

[0062] Optionally, Figure 2 Among them, the detection objects of other factory power supply measurement and control systems 36 include: DC system 361, UPS and diesel engine PLC362. Other factory power supply measurement and control systems 36 monitor and control the working status of DC system 361, UPS and diesel engine PLC362 respectively based on the control instructions of station-level control layer 1.

[0063] In some optional embodiments, such as Figure 2 As shown, the station-level control layer 1 includes: an integrated electrical monitoring server 11, an automatic power generation controller 13, an automatic voltage controller 14 and a microcomputer five-protection system 15, an operator station and an engineer station, wherein the integrated electrical monitoring server 11, the automatic power generation controller 13, the automatic voltage controller 14 and the microcomputer five-protection system 15 are all connected to the interval equipment layer 3 through the network communication layer 2.

[0064] Figure 2 In the figure, the automatic power generation controller 13 is also connected to the thermal distributed control system DCS and the dispatching data network. It is used to receive the active power target instructions issued by the dispatching data network, distribute the compressed air energy storage active output value to the thermal distributed control system DCS, and distribute the active output value to the electrochemical energy storage system through the network communication layer.

[0065] Specifically, Figure 2 In the figure, the automatic power generation controller 13 is connected to the dispatching data network at the top and the network of the station-level control layer 1 at the bottom, and is connected to the DCS by hard wiring; the automatic power generation controller 13 receives the active power target instruction issued by the dispatching data network, distributes the electrochemical energy storage active output value to the station-level control layer 1 network according to the preset strategy, and distributes the compressed air energy storage active output value to the DCS.

[0066] Figure 2In the figure, the automatic voltage controller 14 is also connected to the excitation regulator 311, the thermal distributed control system DCS and the dispatching data network. It is used to receive the reactive target value instruction or the high-voltage bus voltage instruction of the power grid issued by the dispatching data network, adjust the working state of the excitation regulator 311, thereby adjusting the reactive output of the turbine generator, and also distributes the reactive output value to the electrochemical energy storage system through the network communication layer.

[0067] Specifically, Figure 2 In the figure, the automatic voltage controller 14 is connected to the dispatching data network upward and to the network of the station-level control layer 1 downward, and is connected to the DCS and the excitation regulator 311 by hard wiring; the automatic voltage controller 14 receives the reactive power target value instruction or the high-voltage bus voltage instruction of the power grid issued by the dispatching data network, and distributes the electrochemical energy storage reactive power output value to the station-level control layer 1 network according to the preset strategy, distributes the reactive power output value of the turbine generator set to the DCS, and performs magnetization / demagnetization operation through the excitation regulator 311.

[0068] Figure 2 In the embodiment, the integrated electrical monitoring server 11 is used to monitor the working status of the electrical equipment in the hybrid energy storage power station.

[0069] Specifically, Figure 2 In the integrated electrical monitoring server 11, one or more of the electrochemical energy storage management software, booster station electrical information monitoring software, compressed air energy storage monitoring software, turbine generator set monitoring software, plant power and motor system monitoring software, electrical system analysis and diagnosis software, and predictive maintenance software are integrated, thereby realizing automated management and control of the measurement and control work of the system in the interval equipment layer 3.

[0070] Figure 2 In the present invention, the microcomputer five-defense system 15 is used to perform five-defense operation management on the electrical equipment in the hybrid energy storage power station.

[0071] Specifically, Figure 2 In a hybrid energy storage power station, it is usually necessary to perform five-defense operation management to prevent accidental pulling / closing of circuit breakers, accidental pulling with load, closing of disconnectors, closing of ground disconnectors with power on, closing of switches with ground wires on, and accidental entry into live intervals, so as to standardize the operating behavior of operators and reduce the occurrence of risk accidents. In conventional schemes, the high-voltage plant power system, electrochemical energy storage system, and booster station system are monitored on different platforms, making it difficult to implement the five-defense operation management of all electrical equipment by the five-defense system. This embodiment integrates all electrical equipment in a unified manner and uses a complete monitoring system to manage the monitoring platform, thereby realizing the five-defense operation management of the entire station's electrical equipment by the microcomputer five-defense system 15.

[0072] Specifically, Figure 2The engineer station includes: electrical engineer station 16 and automatic voltage control workstation 17. Engineers can measure and control the working status of corresponding equipment according to the system software in each workstation, and configure, debug and maintain the control system equipment. The operator station includes: electrical operator station 18 and microcomputer five-defense system 15. Operators can monitor and control the working status of corresponding equipment according to the system software in each workstation.

[0073] In some optional embodiments, the network communication layer 2 includes: Ethernet 21, multiple communication servers 22, and an energy storage coordination controller 343, wherein the turbine generator set measurement and control system 31, the low-voltage plant power supply and motor measurement and control system 33, and other plant power supply measurement and control systems 36 are all connected to the station-level control layer 1 through the communication server 22 and Ethernet 21; the electrochemical energy storage equipment measurement and control system 34 is connected to the station-level control layer 1 through the communication server 22, the energy storage coordination controller 343, and Ethernet 21; the high-voltage plant power supply and motor measurement and control system 32 and the booster station measurement and control system 35 are all connected to the station-level control layer 1 through Ethernet 21.

[0074] Optionally, Figure 2 In the figure, after the excitation regulator 311, the synchronization device 314 and the plant power quick-cut device 315 are connected to the communication server 22 through the MODBUS protocol network, data is transmitted with the station-level control layer 1 through Ethernet; the energy storage converter controller 342 is connected to the energy storage coordination controller 343 through the Ethernet GOOSE protocol and accepts the control instructions of the energy storage coordination controller 343, and the energy storage coordination controller 343 transmits data with the station-level control layer 1 through Ethernet; after the energy storage converter controller 342 is connected to the communication server 22 through the Ethernet MMS protocol, data is transmitted with the station-level control layer 1 through Ethernet; after the low-voltage plant power supply and the motor measurement and control system 33 are connected to the communication server 22 through the PROFIBUS-DP field bus, data is transmitted with the station-level control layer 1 through Ethernet; after the other plant power measurement and control systems 36 are connected to the communication server 22 through the MODBUS protocol network, data is transmitted with the station-level control layer 1 through Ethernet.

[0075] It should be noted that for devices in the interval device layer that do not meet the standard protocols, they are first connected to the communication server, and after protocol conversion, they are connected to the station-level control layer communication network, and the communication server is used for protocol conversion and data transmission; for devices in the interval device layer that meet the standard protocols, they can directly communicate with the station-level control layer through the network.

[0076] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An electrical monitoring system for a compressed air energy storage and electrochemical energy storage hybrid energy storage power station, characterized in that: The electrical monitoring system is an integrated electrical equipment monitoring platform, and comprises: a station-level control layer, a network communication layer and a spacing equipment layer connected in sequence, wherein: The station-level control layer is used to receive control instructions and collect real-time operating data of electrical equipment in the hybrid energy storage power station, perform integrated monitoring of the interval equipment layer based on the control instructions and operating data, and send control adjustment instructions to the interval equipment layer; The network communication layer is used to realize protocol conversion and data transmission between the station-level control layer and the interval device layer; The interval equipment layer is used to monitor the operating status and adjust the operating status of the corresponding electrical equipment in the hybrid energy storage power station based on the control and adjustment instructions of the station-level control layer.

2. The electrical monitoring system of the hybrid energy storage power station according to claim 1, characterized in that: The interval equipment layer includes: turbine generator set measurement and control system, high-voltage plant power supply and motor measurement and control system, low-voltage plant power supply and motor measurement and control system, electrochemical energy storage equipment measurement and control system, booster station measurement and control system and other plant power supply measurement and control systems, among which, The turbine generator set measurement and control system, high-voltage plant power supply and motor measurement and control system, low-voltage plant power supply and motor measurement and control system, electrochemical energy storage equipment measurement and control system, booster station measurement and control system and other plant power supply measurement and control systems are all connected to the station-level control layer through the network communication layer; The turbine generator set measurement and control system is used to monitor and control the working state of the turbine generator and its excitation system based on the control instructions of the station-level control layer; The high-voltage plant power supply and motor measurement and control system is used to monitor and control the working status of the compressed air energy storage high-voltage plant power supply system and the compressed air energy storage high-voltage motor system based on the control instructions of the station-level control layer; The low-voltage plant power supply and motor measurement and control system is used to monitor and control the working status of the compressed air energy storage low-voltage plant power supply system and the compressed air energy storage low-voltage motor system based on the control instructions of the station-level control layer; The electrochemical energy storage device measurement and control system is used to monitor and control the working state of the electrochemical energy storage device based on the control instructions of the station-level control layer; The booster station measurement and control system is used to monitor and control the working status of each electrical primary equipment in the booster station based on the control instructions of the station-level control layer; The other plant power supply measurement and control system is used to monitor and control the working status of other electrical equipment in the hybrid energy storage power station based on the control instructions of the station-level control layer.

3. The electrical monitoring system of the hybrid energy storage power station according to claim 2, characterized in that: The turbine generator set measurement and control system includes: an excitation regulator, a turbine generator measurement and control device and a turbine generator protection device, wherein: The excitation regulator, turbine generator measurement and control device and turbine generator protection device are all connected to the station-level control layer through the network communication layer, and the excitation regulator, turbine generator measurement and control device and turbine generator protection device are also connected to the turbine generator set; The turbine generator measurement and control device is used to measure and control the working state of the turbine generator set based on the control instructions of the station-level control layer; The turbine generator protection device is used to protect the turbine generator set and feed back protection information to the station-level control layer; The excitation regulator is used to adjust the excitation current of the turbine generator set and the reactive power of the turbine generator set based on the control instructions of the station-level control layer.

4. The electrical monitoring system of the hybrid energy storage power station according to claim 2, characterized in that: The electrochemical energy storage device measurement and control system includes: an energy storage coordination controller, multiple energy storage battery management systems and multiple energy storage converter controllers, wherein: Each of the energy storage battery management systems and each of the energy storage converter controllers are connected to the station-level control layer through the energy storage coordination controller and the network communication layer, and each of the energy storage battery management system and each of the energy storage converter controllers are also connected to an electrochemical energy storage device respectively; The energy storage battery management system is used to monitor and manage the operating status of the energy storage battery, and adjust the charging and discharging process of each electrochemical energy storage device based on the control instructions of the station-level control layer; The energy storage coordination controller is used to allocate power output values ​​to each energy storage converter controller based on the control instructions of the station-level control layer and in combination with the operating status of the energy storage battery fed back by the station-level control layer; The energy storage converter controller is used to control the power output of each energy storage converter.

5. The electrical monitoring system of the hybrid energy storage power station according to claim 2, characterized in that: The high-voltage plant power supply and motor measurement and control system includes: multiple power supply comprehensive protection measurement and control devices and multiple motor comprehensive protection measurement and control devices, wherein: Each of the power supply integrated protection measurement and control devices is connected to the station-level control layer through the network communication layer, and each of the power supply integrated protection measurement and control devices is also connected to a high-voltage plant power supply. The power supply integrated protection measurement and control device is used to monitor the operating parameters of the power supply connected thereto, and adjust and control the operating parameters of the power supply based on the control instructions of the station-level control layer; Each of the motor comprehensive protection and measurement and control devices is connected to the station-level control layer through the network communication layer. Each of the motor comprehensive protection and measurement and control devices is also connected to a high-voltage motor and a thermal distributed control system respectively. The motor comprehensive protection and measurement and control device is used to monitor the working status of the high-voltage motor and control the working status of the high-voltage motor connected thereto based on the control instructions of the station-level control layer and the thermal logic signals of the thermal distributed control system.

6. The electrical monitoring system of the hybrid energy storage power station according to claim 2, characterized in that: The low-voltage plant power supply and motor measurement and control system includes: intelligent switches, motor controllers and intelligent instruments, among which: The intelligent switch, motor controller and intelligent instrument are all connected to the station-level control layer through the network communication layer. The intelligent switch, motor controller and intelligent instrument are also connected to each low-voltage plant power supply or each low-voltage motor respectively. The motor controller is also connected to a thermal distributed control system. The intelligent switch is used to control the switch state of the low-voltage plant power supply based on the control instruction of the station-level control layer, and monitor the electrical quantity of the low-voltage plant power supply; The motor controller is used to control the operating state of the corresponding low-voltage motor based on the control instructions of the station-level control layer and the thermal logic signal of the thermal distributed control system; The intelligent instrument is used to monitor the working parameters of each low-voltage plant power supply and / or each low-voltage motor.

7. The electrical monitoring system of the hybrid energy storage power station according to claim 2, characterized in that: The booster station measurement and control system includes: multiple bus measurement and control protection systems, multiple line measurement and control protection systems and multiple transformer measurement and control protection systems, wherein: Each of the busbar measurement and control protection system, line measurement and control protection system and transformer measurement and control protection system is connected to the station-level control layer through the network communication layer; The busbar measurement, control and protection system is used to monitor the operating status of the busbar equipment in the booster station, and to control and protect the busbar equipment; The line measurement, control and protection system is used to monitor the operating status of the booster station line equipment and to control and protect the line equipment; The transformer measurement, control and protection system is used to monitor the operating status of the transformer and to control and protect the transformer equipment.

8. The electrical monitoring system of the hybrid energy storage power station according to claim 3, characterized in that: The station-level control layer includes: integrated electrical monitoring server, automatic power generation controller, automatic voltage controller, microcomputer five-protection system, operator station, engineer station, among which, The integrated electrical monitoring server, automatic power generation controller, automatic voltage controller, microcomputer five-protection system, operator station, and engineer station are all connected to the interval equipment layer through the network communication layer; The automatic power generation controller is also connected to the thermal distributed control system and the dispatching data network, and is used to receive the active power target instruction issued by the dispatching data network, distribute the compressed air energy storage active output value to the thermal distributed control system, and distribute the active output value to the electrochemical energy storage system through the network communication layer; The automatic voltage controller is also connected to the excitation regulator, the thermal distributed control system and the dispatching data network, and is used to receive reactive power target value instructions or power grid high-voltage bus voltage instructions issued by the dispatching data network, adjust the working state of the excitation regulator, thereby adjusting the reactive power output of the turbine generator, and also distribute reactive power values ​​to the electrochemical energy storage device measurement and control system through the network communication layer; The integrated electrical monitoring server is used to monitor the working status of the electrical equipment in the hybrid energy storage power station; The microcomputer five-defense system is used to perform five-defense operation management on the electrical equipment in the hybrid energy storage power station.

9. The electrical monitoring system of the hybrid energy storage power station according to claim 8, characterized in that: The integrated electrical monitoring server integrates one or more of electrochemical energy storage management software, booster station electrical information monitoring software, compressed air energy storage monitoring software, turbine generator set monitoring software, plant power and motor system monitoring software, electrical system analysis and diagnosis software, and predictive maintenance software.

10. The electrical monitoring system of the hybrid energy storage power station according to claim 2, characterized in that: The network communication layer includes: Ethernet and multiple communication servers, wherein: The turbine generator set measurement and control system, the low-voltage plant power supply and motor measurement and control system and the other plant power supply measurement and control systems are all connected to the station-level control layer through the communication server and the Ethernet; The communication server and the Ethernet are connected to the station-level control layer; The high-voltage plant power supply and motor measurement and control system and the booster station measurement and control system are connected to the station-level control layer via the Ethernet.

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