Compressed air energy storage power station EMS system

Abstract

The invention provides a compressed air energy storage power station EMS system, and relates to the technical field of energy storage, and the compressed air energy storage power station EMS system comprises a field data collection unit which is used for collecting key parameters of a compressed air energy storage power station in real time; the data storage and calculation unit is used for correcting and storing the key parameters of the compressed air energy storage power station collected in real time as historical key parameters; the decision-making unit is used for acquiring real-time storage performance data of the salt cavern by acquiring key parameters and historical key parameters of the compressed air energy storage power station in real time; by means of the compressed air energy storage power station energy management system, a series of energy parameters of a power station can be calculated, and energy management of the compressed air energy storage power station can be better achieved.

Description

[Technical field]

[0001] The present invention relates to the technical field of energy gas station storage, and in particular to an EMS system of a compressed air energy storage power station. [Background technology]

[0002] Under the background of the "dual carbon" goal, new energy sources such as photovoltaics and wind power are developing rapidly. New energy sources have strong randomness and volatility, and have a great impact on the power grid. For this reason, energy storage technology has emerged as a key technology to solve the problem of new energy. With the vigorous development of new energy resources, the demand for long-term energy storage is getting higher and higher. Compressed air energy storage, as a long-term energy storage, has the characteristics of large capacity, high safety, long service life and low construction cost. It plays an important supporting role in auxiliary services such as peak regulation, frequency regulation, peak shaving and valley filling, and rotational inertia support.

[0003] Since there are few compressed air energy storage power stations put into operation, many scholars have mainly carried out a lot of research on compressed air energy storage technology from the aspects of system optimization, waste heat utilization, equipment research and development, simulation development, etc. Most of the research is in the construction period of compressed air energy storage power stations, and there are few studies on power stations in operation. The compressed air energy storage system includes the compressor system, expander system, heat storage system, heat exchange system, and gas storage system. Each system is crucial, so there are many parameters to monitor for each system. Most of these parameters are process parameters. There is less monitoring of energy parameters such as the gas filling volume, remaining chargeable capacity, and power generation of the power station, and its monitoring methods are relatively immature. At this time, it is necessary to calculate through the existing monitoring parameters. However, there is currently little research on this system.

[0004] Therefore, it is necessary to study a compressed air energy storage power station EMS system to address the shortcomings of the existing technology and to solve or alleviate one or more of the above problems. [Summary of the invention]

[0005] In view of this, the present invention provides an EMS system for a compressed air energy storage power station, through which a series of energy parameters of the power station can be calculated to better manage the energy of the compressed air energy storage power station.

[0006] In one aspect, the present invention provides a compressed air energy storage power station EMS system, the compressed air energy storage power station EMS system comprising:

[0007] On-site data acquisition unit, used to collect key parameters of compressed air energy storage power station in real time;

[0008] A data storage and calculation unit, used to correct and store the key parameters of the compressed air energy storage power station collected in real time as historical key parameters;

[0009] A decision-making unit, which is used to obtain real-time storage performance data of the salt cavern by collecting key parameters and historical key parameters of the compressed air energy storage power station in real time;

[0010] The field data acquisition unit is connected to the decision-making unit via the data storage and calculation unit.

[0011] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the key parameters include compressor exhaust temperature, compressor exhaust pressure, compressor exhaust flow rate, compressor power, expander inlet temperature, expander inlet pressure, expander inlet flow rate, gas storage reservoir volume and power station load.

[0012] According to the above aspects and any possible implementation, an implementation is further provided, wherein the field data acquisition unit includes a plurality of data acquisition sensors, and the plurality of data acquisition sensors are all connected to the data storage and computing unit.

[0013] According to the above aspects and any possible implementation, there is further provided an implementation, wherein the field data acquisition unit is connected to the data storage and computing unit via a twisted pair copper core wire.

[0014] According to the above aspects and any possible implementation, there is further provided an implementation, wherein the data storage and computing unit is connected to the decision-making unit via a communication protocol.

[0015] According to the above aspects and any possible implementation, there is further provided an implementation, wherein the data storage and calculation unit includes a historical database and a real-time database;

[0016] Wherein, the historical database is used to store the historical key parameters collected by the field collection unit;

[0017] The real-time database is used to store the real-time key parameters collected by the field collection unit;

[0018] The historical database and the real-time database are both connected to the field data acquisition unit.

[0019] According to the aspects and any possible implementation methods described above, an implementation method is further provided, wherein the real-time storage performance data includes the maximum gas mass that the salt cavern can accommodate, the remaining gas mass in the salt cavern, the charged amount, the remaining chargeable amount, the remaining chargeable time, the current power generation, the remaining power generation, the remaining power generation time, the battery capacity of the EMS system, the unit power-to-power conversion efficiency, the plant power consumption rate, the monthly energy storage times, the monthly energy release times, the annual energy storage times and the annual energy release times.

[0020] According to the above aspects and any possible implementation, an implementation is further provided, wherein the communication protocol includes but is not limited to TCP / IP transmission protocol, MODBUS protocol, Profibus protocol and OPC protocol.

[0021] According to the above aspects and any possible implementation, there is further provided an implementation, wherein the data storage and computing unit further includes an engineer station and an operator station, wherein;

[0022] The engineer station is used to add, delete and modify related control logic and measurement points;

[0023] The operator station is used to view and display EMS system related data;

[0024] The engineer station and the operator station are both connected to the historical database and the real-time database at the same time.

[0025] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the decision unit includes a high-performance calculator and a computing results storage database, one end of the high-performance calculator is connected to the historical database and the real-time database, and the other end is connected to the computing results storage database.

[0026] Compared with the prior art, the present invention can achieve the following technical effects:

[0027] (1) The present invention provides an energy management system for compressed air energy storage, which can grasp the operating status of the power station in real time, make good power station operation planning, and facilitate grid dispatching.

[0028] (2) The present invention can calculate in real time how much gas the current gas storage can store at most, how much gas can still be stored, and how long it can be stored, and records the energy status of the power station in more detail, providing safe operation guarantee for the compressor operation.

[0029] (3) The present invention can also calculate in real time how much gas the current gas storage can release and how long it can be released, and can inform the power grid of the power generation capacity of the power station at any time, making it convenient for the power grid to match and dispatch the electricity in the entire region.

[0030] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time.

Brief Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a system structure diagram of a compressed air energy storage power station EMS system provided by an embodiment of the present invention. [Specific implementation method]

[0033] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] It should be clear that 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.

[0035] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0036] The present invention provides a compressed air energy storage power station EMS system, the compressed air energy storage power station EMS system comprising:

[0037] On-site data acquisition unit, used to collect key parameters of compressed air energy storage power station in real time;

[0038] A data storage and calculation unit, used to correct and store the key parameters of the compressed air energy storage power station collected in real time as historical key parameters;

[0039] A decision-making unit, which is used to obtain real-time storage performance data of the salt cavern by collecting key parameters and historical key parameters of the compressed air energy storage power station in real time;

[0040] The field data acquisition unit is connected to the decision-making unit via the data storage and calculation unit.

[0041] The key parameters include compressor exhaust port temperature, compressor exhaust port pressure, compressor exhaust flow rate, compressor power, expander inlet temperature, expander inlet pressure, expander inlet flow rate, gas storage reservoir volume and power station load.

[0042] The field data acquisition unit includes a plurality of data acquisition sensors, and the plurality of data acquisition sensors are all connected to the data storage and calculation unit.

[0043] The field data acquisition unit is connected to the data storage and calculation unit via a twisted pair copper core wire.

[0044] The data storage and calculation unit is connected with the decision-making unit via a communication protocol.

[0045] The data storage and calculation unit includes a historical database and a real-time database;

[0046] Wherein, the historical database is used to store the historical key parameters collected by the field collection unit;

[0047] The real-time database is used to store the real-time key parameters collected by the field collection unit;

[0048] The historical database and the real-time database are both connected to the field data acquisition unit.

[0049] The real-time storage performance data includes the maximum gas mass that the salt cavern can accommodate, the remaining gas mass in the salt cavern, the charged amount, the remaining chargeable amount, the remaining chargeable time, the current power generation, the remaining power generation, the remaining power generation time, the battery capacity of the EMS system, the unit power-to-power conversion efficiency, the plant power consumption rate, the monthly energy storage times, the monthly energy release times, the annual energy storage times and the annual energy release times.

[0050] The communication protocols include but are not limited to TCP / IP transmission protocol, MODBUS protocol, Profibus protocol and OPC protocol.

[0051] The data storage and computing unit also includes an engineer station and an operator station, wherein;

[0052] The engineer station is used to add, delete and modify related control logic and measurement points;

[0053] The operator station is used to view and display EMS system related data;

[0054] The engineer station and the operator station are both connected to the historical database and the real-time database at the same time.

[0055] The decision-making unit includes a high-performance calculator and a computing result storage database. One end of the high-performance calculator is connected to a historical database and a real-time database, and the other end is connected to the computing result storage database.

[0056] Embodiment 1:

[0057] refer to Figure 1 The present invention provides a compressed air energy storage power station EMS system, which specifically includes:

[0058] On-site data collection unit 1, data storage and calculation unit 2, decision-making unit 3.

[0059] The field data acquisition unit 1 includes a plurality of sensors, which are connected to the data storage and calculation unit 2 via a twisted pair copper core wire 21 , and the data storage and calculation unit 2 is connected to the decision-making unit 3 via a communication protocol 22 .

[0060] The field data acquisition unit 1 mainly realizes the collection of key parameters of each system of the compressed air energy storage power station, and the key parameters include compressor exhaust port temperature, compressor exhaust port pressure, compressor exhaust flow, compressor power, expander inlet temperature, expander inlet pressure, expander inlet flow, gas storage reservoir volume, and power station load.

[0061] The data storage and calculation unit 2 mainly includes an engineer station 5, an operator station 6, a historical database 4, and a real-time database 7. The historical database 4 is used to store historical data collected by the field acquisition unit, and the real-time database 7 is used to store real-time data collected by the field acquisition unit. The engineer station 5 is mainly used to add, delete, and modify related control logic and measurement points, and the operator station 6 is mainly used to view and display EMS system related data.

[0062] The decision-making unit 3 mainly includes a high-performance calculator and a calculation result storage database. The high-performance calculator mainly calculates the maximum gas mass that the salt cavern can accommodate, the remaining gas mass in the salt cavern, the charged amount, the remaining chargeable amount, the remaining chargeable time, the current power generation, the remaining power generation, the remaining power generation time, the battery capacity of the EMS system, the unit power-to-power conversion efficiency, the plant power consumption rate, the monthly energy storage times, the monthly energy release times, the annual energy storage times, and the annual energy release times based on the historical data 4 and the historical data and real-time data in the real-time database 7.

[0063] The maximum gas mass M1 that the salt cavern can accommodate is mainly obtained by establishing a density model of the compressed air in the salt cavern based on the temperature and pressure of the salt cavern and combining it with the volume of the salt cavern.

[0064] The residual gas mass M2 in the salt cavern is mainly obtained by obtaining the salt cavern density model through the current pressure and corresponding temperature, the minimum pressure and corresponding temperature of the salt cavern, and combining it with the salt cavern volume.

[0065] The charged amount Q1 is determined based on the remaining gas mass in the salt cavern, the maximum gas mass that the salt cavern can accommodate and the maximum discharge capacity of the unit, and the formula is Q1=M2 / M1×1500MWh.

[0066] The remaining chargeable capacity Q2 is determined based on the current available capacity of the salt cavern, the maximum available capacity of the salt cavern and the amount charged this time: Q2 = current available capacity of the salt cavern / maximum available capacity of the salt cavern×1500MWh-Q1.

[0067] The remaining charging time T1 is determined according to the remaining gas mass of the salt cavern, the maximum gas mass that the salt cavern can accommodate, and the charging flow of the A / B series compressor units. T1 = (M1-M2) / f, where f is the intake flow of the compressor unit.

[0068] The current generated power W1 is mainly based on the accumulation of the active power of the unit over time.

[0069] The remaining power generation capacity W2 is mainly determined according to the ratio of the remaining gas mass M2 to the real-time gas consumption rate V1 of the unit.

[0070] The remaining expandable time T2 is mainly determined according to the ratio of the remaining gas mass M2 to the expander intake air flow V2.

[0071] The battery capacity of the EMS system is mainly determined by the remaining gas mass M2 of the salt cavern and the maximum gas mass M1 that can be accommodated in the salt cavern.

[0072] The monthly energy storage times are mainly based on the start-up of the compressor unit to inject gas into the salt cavern, which is regarded as an energy storage process, and the energy storage times within one month are counted.

[0073] The monthly energy release times are mainly based on the air intake of the expansion unit. As an energy release process, the energy release times within one month are counted.

[0074] The annual energy storage times are based on the monthly energy storage times, and the annual energy storage times are counted.

[0075] The annual energy release times are based on the monthly energy release times, and the annual energy release times are counted.

[0076] The results calculated by the high performance computer are stored in the result storage data 9 and sent to the DCS system via the communication protocol 22.

[0077] The communication protocol 22 may adopt TCP / IP transmission protocol, MODBUS protocol, Profibus protocol, or OPC protocol.

[0078] The above is a detailed introduction to a compressed air energy storage power station EMS system provided by the embodiment of the present application. The description of the above embodiment is only used to help understand the method and core idea of ​​the present application; at the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

[0079] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different nouns to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. As mentioned throughout the specification and claims, "including" and "comprising" are open-ended terms, so they should be interpreted as "including / including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect. The subsequent description of the specification is a preferred embodiment of the present application, but the description is for the purpose of illustrating the general principles of the present application, and is not used to limit the scope of the present application. The scope of protection of the present application shall be determined by the definition of the attached claims.

[0080] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0081] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0082] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. A compressed air energy storage power station EMS system, characterized in that: The compressed air energy storage power station EMS system includes: On-site data acquisition unit, used to collect key parameters of compressed air energy storage power station in real time; A data storage and calculation unit, used to correct and store the key parameters of the compressed air energy storage power station collected in real time as historical key parameters; A decision-making unit, used to obtain real-time storage performance data of the salt cavern by collecting key parameters and historical key parameters of the compressed air energy storage power station in real time; The field data acquisition unit is connected to the decision-making unit via the data storage and calculation unit.

2. The compressed air energy storage power station EMS system according to claim 1 is characterized in that: The key parameters include compressor exhaust temperature, compressor exhaust pressure, compressor exhaust flow, compressor power, expander inlet temperature, expander inlet pressure, expander inlet flow, gas storage capacity and power station load.

3. The compressed air energy storage power station EMS system according to claim 1, characterized in that: The field data acquisition unit includes a plurality of data acquisition sensors, and the plurality of data acquisition sensors are all connected to the data storage and calculation unit.

4. The compressed air energy storage power station EMS system according to claim 1, characterized in that: The field data acquisition unit is connected to the data storage and calculation unit via a twisted pair copper core wire.

5. The compressed air energy storage power station EMS system according to claim 1, characterized in that: The data storage and calculation unit is connected with the decision-making unit via a communication protocol.

6. The compressed air energy storage power station EMS system according to claim 1, characterized in that: The data storage and calculation unit includes a historical database and a real-time database; Wherein, the historical database is used to store the historical key parameters collected by the field collection unit; The real-time database is used to store the real-time key parameters collected by the field collection unit; The historical database and the real-time database are both connected to the field data acquisition unit.

7. The compressed air energy storage power station EMS system according to claim 1, characterized in that: The real-time storage performance data includes the maximum gas mass that the salt cavern can accommodate, the remaining gas mass in the salt cavern, the charged amount, the remaining chargeable amount, the remaining chargeable time, the current power generation, the remaining power generation, the remaining power generation time, the battery capacity of the EMS system, the unit power-to-power conversion efficiency, the plant power consumption rate, the monthly energy storage times, the monthly energy release times, the annual energy storage times and the annual energy release times.

8. The EMS system of a compressed air energy storage power station according to claim 5, characterized in that: The communication protocols include but are not limited to TCP / IP transmission protocol, MODBUS protocol, Profibus protocol and OPC protocol.

9. The EMS system of a compressed air energy storage power station according to claim 6, characterized in that: The data storage and computing unit also includes an engineer station and an operator station, wherein; The engineer station is used to add, delete and modify related control logic and measurement points; The operator station is used to view and display EMS system related data; The engineer station and the operator station are both connected to the historical database and the real-time database at the same time.

10. The EMS system of a compressed air energy storage power station according to claim 1, characterized in that: The decision-making unit includes a high-performance calculator and a computing result storage database. One end of the high-performance calculator is connected to a historical database and a real-time database, and the other end is connected to the computing result storage database.

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