Compressed air energy storage power generation side frequency modulation method, device, equipment, medium and product

Abstract

The application relates to the technical field of power systems, in particular to a compressed air energy storage power generation side frequency modulation method, device, equipment, medium and product, wherein the method comprises the following steps: acquiring wind turbine power, thermal power unit power, compressed air energy storage turbine side power and load power; inputting the wind turbine power, the thermal power unit power, the compressed air energy storage turbine side power and the load power into a compressed air energy storage frequency modulation system model; and outputting target frequency modulation parameters from the compressed air energy storage frequency modulation system model, wherein the compressed air energy storage frequency modulation system model comprises a compressed air energy storage system model based on active disturbance rejection control and a high-proportion wind power model, the reference value of the compressed air energy storage turbine side power is tracked based on the active disturbance rejection control; and the compressed air energy storage system frequency modulation is controlled based on the target frequency modulation parameters. Therefore, the problems of low compressed air energy storage system frequency modulation performance and poor frequency modulation effect in the related art are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power systems, and in particular to a compressed air energy storage power generation side frequency modulation method, device, equipment, medium and product. BACKGROUND

[0002] To cope with the challenge of resource depletion, it is necessary to build a new power system with new energy as the main body. However, due to the volatility and randomness of new energy generation, high proportion of new energy access to the power grid will bring great challenges to the safe and stable operation of the power system. Large-scale energy storage technology can smooth the volatility of new energy generation and is a key technology to support high proportion of new energy grid connection. As a large-scale clean physical energy storage technology, non-supplemental combustion compressed air energy storage technology not only inherits the advantages of traditional compressed air energy storage technology, but also removes the process of fossil fuel combustion, realizes non-combustion and zero carbon emission throughout the process, and further improves the cycle efficiency of the entire system. Non-supplemental combustion compressed air energy storage power station itself has superior dynamic response performance.

[0003] However, the current compressed air energy storage power station has not been able to fully exert its advantages as a flexible resource to provide grid frequency modulation service. The control of the compressed air energy storage system often uses PID (Proportional Integral Derivative) control. Although PID control has the advantages of simple control principle and easy implementation, its nonlinearity significantly increases the control difficulty for the compressed air energy storage system which is often in variable working conditions, making it difficult to achieve optimal control under variable working conditions, and further leading to low frequency modulation performance and poor frequency modulation effect. SUMMARY

[0004] The present application provides a compressed air energy storage power generation side frequency modulation method, device, equipment, medium and product to solve the problems of low frequency modulation performance and poor frequency modulation effect of the compressed air energy storage system in related technologies.

[0005] The first aspect embodiment of the present application provides a compressed air energy storage power generation side frequency modulation method, comprising the following steps: obtaining wind turbine power, thermal power unit power, compressed air energy storage turbine side power and load power; inputting the wind turbine power, thermal power unit power, compressed air energy storage turbine side power and load power into a compressed air energy storage frequency modulation system model, and the compressed air energy storage frequency modulation system model outputs target frequency modulation parameters, wherein the compressed air energy storage frequency modulation system model includes a self-disturbance control compressed air energy storage system model and a high proportion of wind power model, and the reference value of the compressed air energy storage turbine side power is tracked based on self-disturbance control; and controlling the compressed air energy storage system frequency modulation based on the target frequency modulation parameters.

[0006] Optionally, the formula of the compressed air energy storage frequency modulation system model is:

[0007]

[0008] wherein, Δf is the frequency variation of the compressed air energy storage frequency regulation system, H sys is the inertia constant of the compressed air energy storage frequency regulation system, P w , P G , P t and P L are the wind power, the thermal power, the compressed air energy storage turbine side power and the load power respectively, D is the load frequency sensitivity, P 0,i is the rated power of each unit, H k is the inertia constant of each unit, P tref is the system reference power of the compressed air energy storage turbine expansion stage, P t0 is the turbine rated power, R t is the primary regulation coefficient of the turbine subsystem, K AGC,t is the automatic generation control coefficient of the turbine subsystem.

[0009] Optionally, the active disturbance rejection control comprises: inputting the compressed air energy storage turbine side power into an extended state observer, the extended state observer outputting tracking a given command signal and a total disturbance; calculating a difference between a reference value of the compressed air energy storage turbine side power and a value corresponding to the given command signal, and calculating an initial control quantity according to the difference and a state error feedback law; and compensating the initial control quantity according to the total disturbance to obtain a final control quantity.

[0010] Optionally, the thermal power unit provides primary frequency regulation and secondary frequency regulation based on automatic generation control; and the turbine of the compressed air energy storage system provides primary frequency regulation and secondary frequency regulation based on automatic generation control.

[0011] Optionally, before inputting the wind power, the thermal power, the compressed air energy storage turbine side power and the load power into the compressed air energy storage frequency regulation system model, the method further comprises: obtaining a compressed air energy storage system model and a high proportion wind power model; establishing a component level dynamic model of the compressed air energy storage system according to the compressed air energy storage system model; introducing an active disturbance rejection control into the component level dynamic model to obtain an active disturbance rejection control compressed air energy storage system model; and generating the compressed air energy storage frequency regulation system model according to the active disturbance rejection control compressed air energy storage system model and the high proportion wind power model.

[0012] Optionally, the compressed air energy storage system model comprises at least one component model of a turbine, a heat exchanger, a gas storage chamber and a heat storage tank, and the high proportion wind power model comprises a wind power unit model and a thermal power unit model.

[0013] The second aspect embodiment of the application provides a compressed air energy storage power generation side frequency modulation device, comprising: an acquisition module, configured to acquire wind turbine power, thermal power unit power, compressed air energy storage turbine side power and load power; an input module, configured to input the wind turbine power, the thermal power unit power, the compressed air energy storage turbine side power and the load power into a compressed air energy storage frequency modulation system model, and the compressed air energy storage frequency modulation system model outputs a target frequency modulation parameter, wherein the compressed air energy storage frequency modulation system model comprises a compressed air energy storage system model based on active disturbance rejection control and a high proportion of wind power model, and the reference value of the compressed air energy storage turbine side power is tracked based on the active disturbance rejection control; and a control module, configured to control the compressed air energy storage system frequency modulation based on the target frequency modulation parameter.

[0014] Optionally, the formula of the compressed air energy storage frequency modulation system model is as follows:

[0015]

[0016] wherein, Δf is the frequency change of the compressed air energy storage frequency modulation system, H sys is the inertia constant of the compressed air energy storage frequency modulation system, P w , P G , P t and P L are the wind power, the thermal power, the compressed air energy storage turbine side power and the load power respectively, D is the load frequency sensitivity, P 0,i is the rated power of each unit, H k is the inertia constant of each unit, P tref is the system reference power in the compressed air energy storage turbine expansion stage, P t0 is the turbine rated power, R t is the primary regulation coefficient of the turbine subsystem, and K AGC,t is the automatic generation control coefficient of the turbine subsystem.

[0017] Optionally, the active disturbance rejection control comprises: inputting the compressed air energy storage turbine side power into an extended state observer, and the extended state observer outputs a tracking given instruction signal and a total disturbance; calculating the difference between the reference value of the compressed air energy storage turbine side power and the value corresponding to the tracking given instruction signal, calculating an initial control amount according to the difference and a state error feedback law; and compensating the initial control amount according to the total disturbance to obtain a final control amount.

[0018] Optionally, the thermal power unit provides primary frequency modulation and secondary frequency modulation based on automatic generation control; and the turbine of the compressed air energy storage system provides primary frequency modulation and secondary frequency modulation based on automatic generation control.

[0019] Optionally, the method further comprises: generating a compressed air energy storage system model and a high proportion wind power model before inputting the wind turbine power, the thermal power unit power, the compressed air energy storage turbine side power and the load power into the compressed air energy storage frequency regulation system model; establishing a component level dynamic model of the compressed air energy storage system according to the compressed air energy storage system model; introducing active disturbance rejection control into the component level dynamic model to obtain an active disturbance rejection controlled compressed air energy storage system model; and generating the compressed air energy storage frequency regulation system model according to the active disturbance rejection controlled compressed air energy storage system model and the high proportion wind power model.

[0020] Optionally, the compressed air energy storage system model comprises at least one component model of a turbine, a heat exchanger, an air storage chamber and a heat storage tank, and the high proportion wind power model comprises a wind turbine model and a thermal power unit model.

[0021] The third aspect of the present application provides an electronic device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor executes the program to implement the compressed air energy storage power generation side frequency regulation method of the above-mentioned embodiments.

[0022] The fourth aspect of the present application provides a computer readable storage medium having a computer program or instructions stored thereon, and the computer program or instructions are executed by a processor to implement the compressed air energy storage power generation side frequency regulation method of the above-mentioned embodiments.

[0023] The fifth aspect of the present application provides a computer program product comprising a computer program or instructions, and the computer program or instructions are executed to implement the compressed air energy storage power generation side frequency regulation method of the above-mentioned embodiments.

[0024] Therefore, the present application has the following beneficial effects:

[0025] The embodiments of the present application can introduce active disturbance rejection control into the compressed air energy storage system, construct a compressed air energy storage frequency regulation system model based on the active disturbance rejection controlled compressed air energy storage system model and the high proportion wind power model, and realize frequency regulation of the compressed air energy storage system by using the compressed air energy storage frequency regulation system, thereby improving the effect and performance of system frequency regulation. Therefore, the technical problems of low frequency regulation performance and poor frequency regulation effect of the compressed air energy storage system in the related art are solved.

[0026] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the following drawings in which:

[0028] Figure 1 A flowchart of a compressed air energy storage power generation side frequency modulation method according to an embodiment of the application is provided.

[0029] Figure 2 A schematic diagram of a non-reheat compressed air energy storage system model according to an embodiment of the application is provided.

[0030] Figure 3 A schematic diagram of a turbine subsystem dynamic model based on active disturbance rejection control according to an embodiment of the application is provided.

[0031] Figure 4 A schematic diagram of a two-area system frequency modulation model containing high proportion of wind power according to an embodiment of the application is provided.

[0032] Figure 5 A schematic diagram of a compressed air energy storage power generation side frequency modulation device according to an embodiment of the application is provided.

[0033] Figure 6 A structural schematic diagram of an electronic device according to an embodiment of the application is provided. DETAILED DESCRIPTION

[0034] Embodiments of the application are described in detail below with reference to the accompanying drawings, in which the same or similar elements or elements having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the application, and cannot be understood as limiting the application.

[0035] The compressed air energy storage power generation side frequency modulation method, device, equipment, medium and product of the embodiments of the application are described below with reference to the accompanying drawings. The PID control is used for the control of the compressed air energy storage system mentioned in the above background art. The PID control has the advantages of simple control principle and easy implementation, but for the compressed air energy storage system which is always in variable operating conditions, its nonlinear characteristics significantly increase the control difficulty, it is difficult to achieve optimal control under variable operating conditions, and further leads to low frequency modulation performance and poor frequency modulation effect. The application provides a compressed air energy storage power generation side frequency modulation method. In the method, active disturbance rejection control is introduced into the compressed air energy storage system, a compressed air energy storage frequency modulation system model is constructed based on the compressed air energy storage system model and the high proportion of wind power model based on active disturbance rejection control, and the compressed air energy storage frequency modulation system is used to realize frequency modulation of the compressed air energy storage system. Thus, the problems of low frequency modulation performance and poor frequency modulation effect of the compressed air energy storage system in the related art are solved.

[0036] Specifically, Figure 1 A flowchart of a compressed air energy storage power generation side frequency modulation method according to an embodiment of the application is provided.

[0037] AsFigure 1 As shown, the compressed air energy power generation side frequency modulation method comprises the following steps:

[0038] In step S101, the wind turbine power, the thermal power unit power, the compressed air energy turbine side power and the load power are obtained.

[0039] In step S102, the wind turbine power, the thermal power unit power, the compressed air energy turbine side power and the load power are input into the compressed air energy frequency modulation system model, and the compressed air energy frequency modulation system model outputs the target frequency modulation parameter, wherein the compressed air energy frequency modulation system model comprises a self-disturbance control compressed air energy system model and a high proportion of wind power model, and the reference value of the compressed air energy turbine side power is tracked based on the self-disturbance control.

[0040] It can be understood that the wind turbine power, the thermal power unit power, the compressed air energy turbine side power and the complex power can be input into the compressed air energy frequency modulation system model, and the compressed air energy frequency modulation system model outputs the target frequency modulation parameter.

[0041] The compressed air energy frequency modulation system model of the embodiment of the application comprises a self-disturbance control compressed air energy system model and a high proportion of wind power model, and the self-disturbance control is introduced, the reference value of the compressed air energy turbine side power is tracked based on the self-disturbance control, and the frequency modulation performance of the compressed air energy frequency modulation system model is improved, wherein the compressed air energy system model can be a non-fuel supplement compressed air energy system model.

[0042] In the embodiment of the application, the formula of the compressed air energy frequency modulation system model is:

[0043]

[0044] Wherein, Δf is the frequency change of the compressed air energy frequency modulation system, H sys is the inertia constant of the compressed air energy frequency modulation system, P w , P G , P t and P L are the wind power, the thermal power, the compressed air energy turbine side power and the load power respectively, D is the load frequency sensitivity, P 0,i is the rated power of each unit, H k is the inertia constant of each unit, P tref is the system reference power of the compressed air energy turbine expansion stage, P t0 is the turbine rated power, R t is the first difference coefficient of the turbine subsystem, K AGC,t is the automatic generation control coefficient of the turbine subsystem.

[0045] In the embodiment of the present application, the active disturbance rejection control comprises: inputting the compressed air energy storage turbine side power into an extended state observer, and the extended state observer outputs a tracking given instruction signal and a total disturbance; calculating a difference between a reference value of the compressed air energy storage turbine side power and a value corresponding to the tracking given instruction signal, calculating an initial control amount according to the difference and a state error feedback law; and compensating the initial control amount according to the total disturbance to obtain a final control amount.

[0046] It can be understood that the active disturbance rejection control in the embodiment of the present application comprises inputting the compressed air energy storage turbine side power into an extended state observer for state observation, and the extended state observer outputs a tracking instruction signal z1 and a total disturbance z2. The reference value of the compressed air energy storage turbine side power and a value corresponding to the tracking instruction signal z1 fed back from the extended state observer are subtracted, an initial control amount u0 is calculated according to the difference and a state error feedback law, and the initial control amount u0 is compensated according to the total disturbance z2 estimated by the extended state observer to obtain a final control amount, that is, a pure control amount u without disturbance.

[0047] Specifically, the active disturbance rejection control comprises an extended state observer and a state error feedback law, and the total power of the turbine is actually measured and fed back to the extended state observer for state observation.

[0048]

[0049] The output signals of the extended observer are z1 and z2, z1 tracks a given instruction signal, and z2 is an estimated value of a total disturbance, and the tracking given instruction signal is a power signal of the compressed air energy storage turbine side output by the extended state observer.

[0050] The total power reference value of the turbine subsystem is subtracted from z1 fed back from the extended state observer, and the difference is input into a state error feedback law to obtain a suitable output amount u0, and the control amount u0 is compensated according to the total disturbance z2 estimated by the extended state observer to obtain a pure control amount u without disturbance.

[0051]

[0052] u=(u0-z2) / b0.

[0053] In the embodiment of the present application, the thermal power generating unit provides primary frequency modulation and secondary frequency modulation based on automatic generation control, and the turbine of the compressed air energy storage system provides primary frequency modulation and secondary frequency modulation based on automatic generation control.

[0054] ​​It can be understood that the thermal power generating unit of the embodiment of the present application provides primary frequency modulation and secondary frequency modulation based on automatic generation control, and the turbine of the compressed air energy storage system provides primary frequency modulation and secondary frequency modulation based on automatic generation control.

[0055] In addition, it should be noted that the wind turbine does not participate in system frequency modulation.

[0056] In the embodiment of the present application, before the wind turbine power, the thermal power generating unit power, the compressed air energy storage turbine side power and the load power are input into the compressed air energy storage frequency modulation system model, the compressed air energy storage system model and the high proportion wind power model are also obtained, the component level dynamic model of the compressed air energy storage system is established according to the compressed air energy storage system model, the active disturbance rejection control is introduced into the component level dynamic model to obtain the active disturbance rejection control compressed air energy storage system model, and the compressed air energy storage frequency modulation system model is generated according to the active disturbance rejection control compressed air energy storage system model and the high proportion wind power model.

[0057] The compressed air energy storage system model includes at least one component model of the turbine, the heat exchanger, the gas storage chamber and the heat storage tank, and the high proportion wind power model includes the wind turbine model and the thermal power generating unit model.

[0058] It can be understood that the embodiment of the present application can establish the component level dynamic model of the compressed air energy storage system according to the compressed air energy storage system model, introduce the active disturbance rejection control into the component level dynamic model to obtain the active disturbance rejection control compressed air energy storage system model, and further generate the compressed air energy storage frequency modulation system model according to the active disturbance rejection control compressed air energy storage system model and the high proportion wind power model.

[0059] In step S103, the compressed air energy storage system frequency modulation is controlled based on the target frequency modulation parameter.

[0060] It can be understood that the embodiment of the present application can control the compressed air energy storage system frequency modulation based on the target frequency modulation parameter, and by introducing the active disturbance rejection control, the control defects of traditional difficulty in control and difficulty in realizing optimal control under variable working condition operation are overcome, so that the frequency modulation effect of the system is improved.

[0061] In summary, the embodiment of the present application proposes a compressed air energy storage power generation side frequency modulation system model based on active disturbance rejection control. Firstly, the non-reheat compressed air energy storage system component level dynamic model of the turbine, the heat exchanger, the gas storage chamber and the heat storage tank is established. Further, the active disturbance rejection control strategy is introduced to establish the compressed air energy storage power tracking control system model based on the active disturbance rejection control. Finally, the two-area system frequency modulation model containing high proportion wind power is established to obtain the compressed air energy storage frequency modulation system model based on the active disturbance rejection control, and the system frequency modulation effect is improved.

[0062] The method for frequency modulation of compressed air energy storage power generation side is described below through a specific embodiment, including the following steps:

[0063] 1. A component-level dynamic model of the turbine, heat exchanger, gas storage chamber and heat storage tank in the non-reheat compressed air energy storage system is established, the variable operating characteristics of each basic component in the system are analyzed, the accuracy and practicability of the system dynamic model are considered, and the system dynamic model is suitable for frequency modulation of the non-reheat compressed air energy storage system power generation side.

[0064] Figure 2 The non-reheat compressed air energy storage system model mainly includes basic components such as turbine, heat exchanger, gas storage chamber and heat storage tank. In order to improve energy utilization efficiency, the system often adopts the structure of “multi-stage compression, inter-stage cooling” and “multi-stage expansion, inter-stage reheating”. In the compression energy storage stage, the compressor compresses air using excess electric energy, stores the compressed high-pressure air in the gas storage chamber, and recovers the compression heat between each stage of the compressor using the heat exchanger and stores it in the heat storage tank. In the expansion energy release stage, the turbine expands the high-pressure air in the gas storage chamber to generate power, and the heat storage tank is used to heat the air between the turbine stages through the heat exchanger. According to the variable operating characteristics of each basic component, the accuracy and practicability of the model are considered, and the component-level dynamic model of the compressed air energy storage system for storage network collaborative analysis is established.

[0065]

[0066] (1) and (2) represent the working characteristics of the turbine, and are the inlet and outlet temperatures of the kth turbine, η ti,k are the isentropic efficiencies of the kth turbine, which are modeled as functions of the turbine air mass flow rate and speed, is the air mass flow rate of the turbine, P t,k and η tm,k are the power and mechanical efficiency of the kth turbine, γ is the adiabatic index, c p,air is the specific heat capacity of air at constant pressure, π t,k is the expansion ratio of the kth turbine. (3) represents the working characteristics of the heat exchanger, and are the inlet temperatures of the heat exchanger on the heat-carrying medium side and the air side, ε r is the effectiveness of the heat exchanger, τ r is the time constant of the heat exchanger. (4) represents the working characteristics of the gas storage chamber, m as is the air mass flow rate of the gas storage chamber, and T as are the inlet air temperature and internal air temperature of the gas storage chamber. (5) represents the characteristics of the heat storage tank, ρHTES V is the volume of the high-temperature heat storage tank, c HTES V is the volume of the high-temperature heat storage tank, c p,HTF V is the volume of the high-temperature heat storage tank, c HTES 、 are the internal, inlet and outlet temperatures of the high-temperature heat storage tank, respectively.

[0067] 2. A self-disturbance control strategy is introduced to establish a power tracking control system for compressed air energy storage based on self-disturbance control. The power of the compressed air energy storage system is directly affected by the air mass flow rate. By adjusting the air valve opening of the turbine, the air mass flow rate can be controlled, and thus the system power can be controlled to achieve fast tracking of the system power to the reference power.

[0068] Figure 3 is the dynamic model of the turbine subsystem based on self-disturbance control. The total power of the subsystem is mainly affected by the air mass flow rate. By adjusting the air valve opening of the turbine, the air mass flow rate of the turbine can be controlled, and thus the output power of the turbine subsystem can be controlled. The reference power input to the turbine subsystem is The total power of the compressor is realized by self-disturbance control to track the reference power . Since the compressor may experience surge and choking phenomena during dynamic operation, the air mass flow rate needs to be strictly limited. The speed of the turbine is affected by the difference between the motor power and the total power of the turbine . By inputting the air mass flow rate and speed of each stage of the turbine into the dynamic model of the turbine subsystem, the parameters of the turbine subsystem can be calculated.

[0069] Self-disturbance control includes an extended state observer and a state error feedback law. The actual measured total power of the turbine is fed back to the extended state observer for state observation,

[0070]

[0071] where the output signals of the extended observer are z1 and z2, z1 tracks the given command signal, and z2 is the estimated value of the total disturbance. Tracking the given command signal is equivalent to the power signal of the turbine side of the compressed air energy storage output by the extended state observer.

[0072] The turbine subsystem total power reference value and z1 fed back from the extended state observer are subtracted and input to the state error feedback law to obtain the appropriate output u0. Then, according to the total disturbance z2 estimated by the extended state observer, a compensation process is arranged for the control amount u0 to obtain the pure control amount u without disturbance.

[0073]

[0074] u = (u0 - z2) / b0, (9)

[0075] 3. A two-area system frequency regulation model with high proportion of wind power is established. In the system expansion and energy release stage, the turbine provides primary frequency regulation and secondary frequency regulation based on automatic generation control. The established compressed air energy storage system model is connected to the two-area system with high proportion of wind power to realize compressed air energy storage frequency regulation based on active disturbance rejection control.

[0076] Figure 4 A two-area system frequency regulation model with high proportion of wind power is established (equivalent to the compressed air energy storage frequency regulation system model of the present application). A non-reheat compressed air energy storage system is connected to a system with high proportion of wind power connected to the grid. The system includes wind turbines, thermal power units, a non-reheat compressed air energy storage system, and loads. In the entire system, wind power does not participate in system frequency regulation, and thermal power provides primary frequency regulation and secondary frequency regulation based on automatic generation control. The turbine in the turbine subsystem provides primary frequency regulation and secondary frequency regulation based on automatic generation control. A two-area system frequency regulation model with high proportion of wind power is established,

[0077]

[0078] (10) represents the first-order swing equation of the two-area system with high proportion of wind power, Δf is the frequency change of the two-area system with high proportion of wind power, H sys is the inertia constant of the two-area system with high proportion of wind power, P w , P G , P t and P L are the wind power, thermal power, compressed air energy storage turbine side and load power, respectively, and D represents the load frequency sensitivity. (11) represents the inertia constant of the two-area system with high proportion of wind power, P 0,i is the rated power of each unit. (12) represents the system reference power in the turbine expansion stage of the compressed air energy storage, R t represents the primary frequency regulation coefficient of the turbine subsystem, K AGC,t represents the automatic generation control coefficient of the turbine subsystem.

[0079] The compressed air energy storage power side frequency regulation method according to the embodiments of the present application can introduce active disturbance rejection control to the compressed air energy storage system, construct a compressed air energy storage frequency regulation system model based on the compressed air energy storage system model and the high proportion of wind power model, and realize frequency regulation for the compressed air energy storage system using the compressed air energy storage frequency regulation system, thereby improving the effect and performance of system frequency regulation.

[0080] Secondly, the compressed air energy storage power side frequency regulation device according to the embodiments of the present application is described with reference to the accompanying drawings.

[0081] Figure 5 is a block schematic diagram of a compressed air energy storage power generation side frequency modulation device of an embodiment of the present application.

[0082] As shown in Figure 5 , the compressed air energy storage power generation side frequency modulation device 10 comprises an acquisition module 100, an input module 200 and a control module 300.

[0083] The acquisition module 100 is configured to acquire wind turbine power, thermal power unit power, compressed air energy storage turbine side power and load power; the input module 200 is configured to input the wind turbine power, the thermal power unit power, the compressed air energy storage turbine side power and the load power into a compressed air energy storage frequency modulation system model, the compressed air energy storage frequency modulation system model outputting a target frequency modulation parameter, wherein the compressed air energy storage frequency modulation system model comprises a self-disturbance control compressed air energy storage system model and a high-proportion wind power model, and a reference value of the compressed air energy storage turbine side power is tracked based on the self-disturbance control; and the control module 300 is configured to control compressed air energy storage system frequency modulation based on the target frequency modulation parameter.

[0084] In the embodiment of the present application, the formula of the compressed air energy storage frequency modulation system model is as follows:

[0085]

[0086] Wherein, Δf is the frequency change of the compressed air energy storage frequency modulation system, H sys is the inertia constant of the compressed air energy storage frequency modulation system, P w , P G , P t and P L are the wind power, the thermal power, the compressed air energy storage turbine side power and the load power respectively, D is the load frequency sensitivity, P 0,i is the rated power of each unit, H k is the inertia constant of each unit, P tref is the system reference power in the compressed air energy storage turbine expansion stage, P t0 is the turbine rated power, R t is the primary regulation coefficient of the turbine subsystem, and K AGC,t is the automatic generation control coefficient of the turbine subsystem.

[0087] In the embodiment of the present application, the self-disturbance control comprises: inputting the compressed air energy storage turbine side power into an extended state observer, the extended state observer outputting a tracking given instruction signal and a total disturbance; calculating the difference between the reference value of the compressed air energy storage turbine side power and the value corresponding to the tracking given instruction signal, and calculating an initial control amount according to the difference and a state error feedback law; and compensating the initial control amount according to the total disturbance to obtain a final control amount.

[0088] In the embodiment of the present application, the thermal power generating unit provides primary frequency modulation and secondary frequency modulation based on automatic generation control; and the turbine of the compressed air energy storage system provides primary frequency modulation and secondary frequency modulation based on automatic generation control.

[0089] In the embodiment of the present application, the device 10 further comprises a generating module.

[0090] The generating module is configured to: obtain a compressed air energy storage system model and a high proportion wind power model before inputting the wind power generating unit power, the thermal power generating unit power, the compressed air energy storage turbine side power and the load power into the compressed air energy storage frequency modulation system model; establish a component level dynamic model of the compressed air energy storage system according to the compressed air energy storage system model; obtain a self-disturbance control compressed air energy storage system model by introducing self-disturbance control into the component level dynamic model; and generate the compressed air energy storage frequency modulation system model according to the self-disturbance control compressed air energy storage system model and the high proportion wind power model.

[0091] In the embodiment of the present application, the compressed air energy storage system model comprises at least one component model of a turbine, a heat exchanger, an air storage chamber and a heat storage tank, and the high proportion wind power model comprises a wind power generating unit model and a thermal power generating unit model.

[0092] It should be noted that the foregoing explanation of the compressed air energy storage power generation side frequency modulation method embodiment is also applicable to the compressed air energy storage power generation side frequency modulation device of the embodiment, which will not be described here again.

[0093] The compressed air energy storage power generation side frequency modulation device according to the embodiment of the present application can introduce self-disturbance control into the compressed air energy storage system, construct a compressed air energy storage frequency modulation system model based on a self-disturbance control compressed air energy storage system model and a high proportion wind power model, and realize frequency modulation of the compressed air energy storage system by using the compressed air energy storage frequency modulation system, thereby improving the effect and performance of system frequency modulation.

[0094] Figure 6 The structure schematic diagram of the electronic device provided by the embodiment of the present application is shown. The electronic device can comprise:

[0095] The memory 601, the processor 602 and the computer program stored in the memory 601 and executable on the processor 602.

[0096] The processor 602 executes the program to realize the compressed air energy storage power generation side frequency modulation method provided in the above embodiments.

[0097] Further, the electronic device further comprises:

[0098] The communication interface 603 is configured to communicate between the memory 601 and the processor 602.

[0099] The memory 601 is configured to store a computer program executable in the processor 602.

[0100] The memory 601 can include a high-speed RAM (Random Access Memory) memory, and can further include a nonvolatile memory such as at least one disk memory.

[0101] If the memory 601, the processor 602 and the communication interface 603 are independently implemented, the communication interface 603, the memory 601 and the processor 602 can be connected to each other through a bus and complete communication between each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, Figure 6 Only one thick line is used in the figure to represent the bus, but it does not mean that there is only one bus or only one type of bus.

[0102] Optionally, in a specific implementation, if the memory 601, the processor 602 and the communication interface 603 are integrated on a chip, the memory 601, the processor 602 and the communication interface 603 can complete communication between each other through an internal interface.

[0103] The processor 602 can be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement one or more embodiments of the present application.

[0104] The embodiment of the present application further provides a computer readable storage medium, which stores a computer program or instructions, and the computer program or instructions are executed by the processor to implement the compressed air energy storage power generation side frequency modulation method.

[0105] The embodiment of the present application further provides a computer program product, which includes a computer program or instructions, and the computer program or instructions are executed to implement the compressed air energy storage power generation side frequency modulation method.

[0106] In the description of the application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the description of the application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or N embodiments or examples. In addition, different embodiments or examples described in the description of the application and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0107] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "N" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0108] Any process or method descriptions in flow charts or otherwise described herein can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for implementing the specified logical functions or steps, and the preferred embodiments of the application include additional or fewer steps or processes in addition to or other than those shown and discussed. It is appreciated that the steps or processes can be performed in an order other than that shown or discussed, including substantially concurrently or in reverse order, as will be apparent to those skilled in the art.

[0109] It should be understood that parts of the application can be implemented in hardware, software, firmware or a combination thereof. In the above-described embodiments, the steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. As in another embodiment implemented in hardware, any one or a combination of the following technologies known in the art can be used: discrete logic circuit with logic gate circuit for implementing logical functions on data signals, application specific integrated circuit with suitable combination of logic gate circuit, programmable gate array, field programmable gate array, etc.

[0110] Those skilled in the art of the art can understand that the method of implementing the above-mentioned embodiments carries out all or part of the steps. The above-mentioned program can be stored in a computer readable storage medium, which includes one or a combination of the steps of the method embodiment when executed.

[0111] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary, and are not to be interpreted as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A compressed air energy storage power generation side frequency modulation method, characterized by, The method comprises the following steps: acquiring wind turbine power, thermal power unit power, compressed air energy storage turbine side power and load power; inputting the wind turbine power, the thermal power unit power, the compressed air energy storage turbine side power and the load power into a compressed air energy storage frequency modulation system model, the compressed air energy storage frequency modulation system model outputting target frequency modulation parameters, wherein the compressed air energy storage frequency modulation system model comprises a self-disturbance control compressed air energy storage system model and a high proportion wind power model, the reference value of the compressed air energy storage turbine side power being tracked based on self-disturbance control, the formula of the compressed air energy storage system model being: Where, Δf is the frequency change of compressed air energy storage frequency modulation system, H sys is the inertia constant of compressed air energy storage frequency modulation system, P w , P G , P t and P L are wind power, thermal power, compressed air energy storage turbine side and load power respectively, D is the load frequency sensitivity, P 0,i is the rated power of each unit, H k is the inertia constant of each unit, P tref is the system reference power of compressed air energy storage turbine expansion stage, P t0 is the turbine rated power, R t is the primary regulation coefficient of turbine subsystem, K AGC,t is the automatic generation control coefficient of turbine subsystem; controlling compressed air energy storage system frequency modulation based on the target frequency modulation parameters.

2. The compressed air energy storage power generation side frequency modulation method according to claim 1, characterized by, The self-disturbance control comprises: inputting the compressed air energy storage turbine side power into an extended state observer, the extended state observer outputting a tracking given instruction signal and total disturbance; calculating the difference between the reference value of the compressed air energy storage turbine side power and the value corresponding to the tracking given instruction signal, and calculating an initial control amount according to the difference and a state error feedback law; compensating the initial control amount according to the total disturbance to obtain a final control amount.

3. The compressed air energy storage power generation side frequency modulation method according to claim 1, characterized by, The thermal power unit provides primary frequency modulation and secondary frequency modulation based on automatic power generation control; the turbine of the compressed air energy storage system provides primary frequency modulation and secondary frequency modulation based on automatic power generation control.

4. The compressed air energy storage power generation side frequency modulation method according to claim 1, characterized by, Before inputting the wind turbine power, the thermal power unit power, the compressed air energy storage turbine side power and the load power into the compressed air energy storage frequency modulation system model, the method further comprises the following steps: acquiring a compressed air energy storage system model and a high proportion wind power model; establishing a component level dynamic model of the compressed air energy storage system according to the compressed air energy storage system model; introducing self-disturbance control into the component level dynamic model to obtain a self-disturbance control compressed air energy storage system model; generating the compressed air energy storage frequency modulation system model according to the self-disturbance control compressed air energy storage system model and the high proportion wind power model.

5. The compressed air energy storage power generation side frequency modulation method according to claim 3, characterized by, The compressed air energy storage system model comprises at least one component model of a turbine, a heat exchanger, an air storage chamber and a heat storage tank, and the high proportion wind power model comprises a wind turbine model and a thermal power unit model.

6. A compressed air energy storage power generation side frequency modulation device, characterized by, The method comprises the following steps: an acquisition module, configured to acquire wind turbine power, thermal power unit power, compressed air energy storage turbine side power and load power; an input module, configured to input the wind turbine power, the thermal power unit power, the compressed air energy storage turbine side power and the load power into a compressed air energy storage frequency modulation system model, the compressed air energy storage frequency modulation system model outputting target frequency modulation parameters, wherein the compressed air energy storage frequency modulation system model comprises a self-disturbance control compressed air energy storage system model and a high proportion wind power model, the reference value of the compressed air energy storage turbine side power being tracked based on self-disturbance control; the formula of the compressed air energy storage system model being: wherein, Δf is the frequency variation of compressed air energy storage frequency modulation system, H sys is the inertia constant of compressed air energy storage frequency modulation system, P w , P G , P t and P L are wind power, thermal power, compressed air energy storage turbine side power and load power respectively, D is the load frequency sensitivity, P 0,i is the rated power of each unit, H k is the inertia constant of each unit, P tref is the system reference power of compressed air energy storage turbine expansion stage, P t0 is the turbine rated power, R t is the primary regulation coefficient of turbine subsystem, K AGC,t is the automatic generation control coefficient of turbine subsystem; a control module, configured to control compressed air energy storage system frequency modulation based on the target frequency modulation parameters.

7. An electronic device, comprising: The method comprises the following steps: A memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the compressed air energy storage power generation side frequency modulation method of any one of claims 1-5.

8. A computer readable storage medium having stored thereon a computer program or instructions, characterized in that, The computer program or instructions, when executed, implement the compressed air energy storage power generation side frequency modulation method of any one of claims 1-5.

9. A computer program product comprising computer programs or instructions, characterized in that, The computer program or instructions, when executed, implement the compressed air energy storage power generation side frequency modulation method of any one of claims 1-5.

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