Thermal power generating unit superheated steam temperature system control method and system based on multi-type compensation, controller and computer readable storage medium

Abstract

The invention provides a thermal power generating unit superheated steam temperature system control method and system based on multi-type compensation, a controller and a computer readable storage medium. The method comprises the steps that a state space model from the opening degree of a desuperheating water valve to the inlet temperature of a superheater and a state space model from the inlet temperature of the superheater to the outlet temperature of the superheater are established; designing an input inertia compensation link output by an outer ring controller; inputting the output of the input inertia compensation link and the outlet temperature of the superheater into a reduced order expansion state observer; designing a lead-lag compensation link for the highest-order state variable output by the reduced-order expansion state observer; designing a control law based on the output of the reduced-order extended state observer, the output of the lead-lag compensation link and the set value of the outlet temperature of the superheater to obtain control law output; designing an inner ring controller by taking control law output and superheater inlet temperature as input; and the cascade control structure of the superheated steam temperature system is obtained. According to the invention, the temperature fluctuation suppression capability of the superheated steam temperature system can be improved.

Description

Technical Field

[0001] The present invention relates to the field of superheated steam temperature control optimization of thermal power units, and in particular to a superheated steam temperature system control method, system, controller and computer-readable storage medium of thermal power units based on multi-type compensation. Background Art

[0002] The superheated steam temperature system of a thermal power unit is an operating indicator that affects the unit's economy. The higher the superheated steam temperature, the higher the unit's economy. However, too high a temperature will cause irreversible damage to the pipeline; the lower the superheated steam temperature, the lower the unit's economy. In order to operate at high parameters, it is necessary to ensure that the fluctuation range of the superheated steam temperature system is small, thereby increasing the set value of the superheated steam temperature system and ensuring that the unit's superheated steam temperature system operates in a higher range.

[0003] At present, the superheated steam temperature system of thermal power units all uses a cascade control structure. Since the inner loop controller needs to have a faster response speed, PI / PID or conventional first-order / second-order auto-disturbance rejection control is generally used. Since the process from the superheater inlet temperature to the superheater outlet temperature is a large inertia process, the design of the outer loop controller is the focus of research, including weak model feedback control such as PID, strong model feedback control such as model predictive control, and feedback control based on artificial intelligence. PID has the advantages of simple structure, stable performance and easy engineering implementation. However, when dealing with large inertia processes, it has shortcomings such as slow response speed and weak anti-interference ability; robust control also does not rely on accurate mathematical models, but the designed controller is generally a high-order controller, which is difficult to implement in engineering and has strong conservatism. Model predictive control has a satisfactory control effect when the model is accurately known, but the control performance decreases significantly when the model deviates from the design condition; feedback control based on artificial intelligence has limited practical application value due to difficulties such as computational complexity, difficulty in ensuring convergence and difficulty in engineering implementation. Auto-disturbance rejection control has strong anti-interference ability and does not rely on accurate mathematical models, and has received widespread attention. In order to solve the problem of ADRC in dealing with large inertia processes, patents CN201810041569.0 and CN202011125339.6 respectively designed improved solutions for input and output compensation, which can be applied to the design of outer loop controllers. However, the improved solutions did not improve the extended state observer, which resulted in problems such as too high order and limited bandwidth of the extended state observer when the observer had a low compensation order. Summary of the invention

[0004] The purpose of the present invention is to improve the control quality of the superheated steam temperature system of a thermal power unit, and to provide a control method, system, controller and computer-readable storage medium for the superheated steam temperature system of a thermal power unit based on multi-type compensation.

[0005] In a first aspect, the present invention provides a method for controlling a superheated steam temperature system of a thermal power unit based on multi-type compensation, comprising the following steps:

[0006] 1) Based on the operating data of the superheated steam temperature system of the thermal power unit, establish the temperature reduction water valve opening u A To superheater inlet temperature y A The state space model A and the superheater inlet temperature y A State space model B to superheater outlet temperature y;

[0007] 2) Design superheater inlet temperature y A Settings The input inertia compensation link of order ni based on the state space model, and i∈[1,n];

[0008] 3) Input the output of the inertia compensation link and the superheater outlet temperature y are sent to the j-th order reduced-order extended state observer;

[0009] 4) Based on the output z of the j-th order reduced-order extended state observer j+1 Design lead-lag compensation link;

[0010] 5) Based on the output z of the j-th order reduced-order extended state observer j+1 , the output of the lead-lag compensation link z a,j+1 and the superheater outlet temperature set point r to design the control law;

[0011] 6) Set the superheater inlet temperature y A Settings That is, the output of the outer loop controller is updated to the output u1 of the control law, with the output u1 of the control law and the superheater inlet temperature y A Design an inner loop controller for the input, use PI / PID or conventional first-order / second-order ADRC to design the inner loop controller, and update the cooling water valve opening u according to the output of the inner loop controller A , completing the cascade control of the superheated steam temperature system of the thermal power unit.

[0012] Based on the above, the opening of the cooling water valve u A To superheater inlet temperature y A The state space model A is:

[0013]

[0014] In the formula, is the state variable of the state-space model A,

[0015] is the state matrix of the state-space model A,

[0016] is the input matrix of the state-space model A, is the output matrix of the state-space model A, u A is the opening of the cooling water valve, y A is the superheater inlet temperature; m is the order of the state space model A, and m∈(1,10 10 ] and is an integer; T A are the parameters of the state space model, and T A ∈(0,10 10 ]; b A is the gain of state-space model A, and b A ∈[-10 10 ,0);

[0017] From the superheater inlet temperature y A The state space model B to the superheater outlet temperature y is:

[0018]

[0019] In the formula, are the state variables of the state-space model B,

[0020] is the state matrix of the state-space model B,

[0021] is the input matrix of the state-space model B, is the output matrix of state-space model B, t is the superheater outlet temperature; n is the order of state-space model B, n∈(1,10 10 ] and is an integer; T is the parameter of the state space model B, and T∈(0,10 10 ]; b is the gain of the state space model B, and b∈(0,10 10 ].

[0022] Based on the above, the expression of input inertia compensation link is:

[0023]

[0024] In the formula, is the state variable of the input inertia compensation link;

[0025] is the state matrix of the input inertia compensation link;

[0026] is the input matrix of the inertia compensation link, is the superheater inlet temperature y A The setting value of

[0027] Based on the above, the j-order reduced-order extended state observer is designed as follows:

[0028] If j = 1, the reduced-order extended state observer is:

[0029]

[0030] If j ≥ 2, the reduced-order extended state observer is:

[0031]

[0032] Where i≤j, i=2,3,…,j+1, ξ2, ξ i and j+1 are intermediate variables, z2, z i and z j+1 is the output of the reduced-order extended state observer, which is also the state estimate of the state-space model B; l1, l i and l j is the gain of the reduced-order extended state observer, is the parameter that needs to be adjusted; b0 is the estimated value of the gain b of the state-space model B, is the parameter that needs to be adjusted.

[0033] Based on the above, the designed lead-lag compensation link is:

[0034]

[0035] Where, T m is the time constant of the lead-lag compensation link, λ is the coefficient of the lead-lag compensation link, z a,j+1 is the output of the lead-lag compensation link; T m and λ are the parameters that need to be adjusted.

[0036] Based on the above, the expression of the designed control law is as follows:

[0037]

[0038] Where k1, k i and k j is the gain of the control law, is the parameter that needs to be adjusted; u1 is the output of the control law.

[0039] In a second aspect, the present invention provides a control system for a superheated steam temperature system of a thermal power unit based on multi-type compensation, comprising:

[0040] The state space model module presets the state space model A and the state space model B; the state space model A is based on the operation data of the superheated steam temperature system of the thermal power unit, and is established from the desuperheating water valve opening u A To superheater inlet temperature y AThe state space model B is based on the operation data of the superheated steam temperature system of the thermal power unit, and is established from the superheater inlet temperature y A To the state space model of superheater outlet temperature y;

[0041] Input inertia compensation module, the input end is connected to the superheater inlet temperature y A Settings The input inertia compensation link is the superheater inlet temperature y A Settings The ni-order input inertia compensation link based on the state space model, and i∈[1,n];

[0042] The input of the extended state observer module is connected to the output of the input inertia compensation module. and superheater outlet temperature y; the extended state observer is based on the output of the input inertia compensation module and the j-order reduced-order extended state observer designed for the superheater outlet temperature y;

[0043] Lead-lag compensation module, the input end is connected to the output z of the extended state observer module j+1 ; The lead-lag compensation link is based on the output z of the j-order reduced-order extended state observer j+1 designed;

[0044] The control law module has its input connected to the output z of the extended state observer module. j+1 , the output of the lead-lag compensation module z a,j+1 and the superheater outlet temperature set value r; the control law is based on the output z of the j-th order reduced-order extended state observer j+1 , the output of the lead-lag compensation link z a,j+1 and the superheater outlet temperature set point r;

[0045] A cascade control module, the input end of which is connected to the output u1 of the control law module, and includes an outer loop controller update module and an inner loop controller module;

[0046] The outer loop controller update module is used to update the superheater inlet temperature y A Settings Update to the output u1 of the control law module;

[0047] The inner loop controller module uses the output u1 of the control law module and the superheater inlet temperature y A As input, the inner loop controller is designed using PI / PID or conventional first-order / second-order active disturbance rejection control;

[0048] The output of the inner loop controller module is updated to the cooling water valve opening u of the state space model module A, completing the cascade control of the superheated steam temperature system of the thermal power unit.

[0049] In a third aspect, the present invention provides a controller for a superheated steam temperature system of a thermal power unit based on multi-type compensation, comprising:

[0050] one or more processors;

[0051] a memory for storing one or more programs,

[0052] When the one or more programs are executed by the one or more processors, the one or more processors execute the steps of the method for controlling the superheated steam temperature system of a thermal power plant based on multi-type compensation.

[0053] In a fourth aspect, the present invention provides a computer-readable storage medium storing a computer program, characterized in that when the program is executed by a processor, the steps of the method for controlling the superheated steam temperature system of a thermal power unit based on multi-type compensation are implemented.

[0054] Compared with the prior art, the present invention has outstanding substantive features and significant progress, specifically:

[0055] 1. Aiming at the control difficulties of the superheated steam temperature system of thermal power units, the present invention designs multiple types of compensation links. The input inertia compensation link is used to improve the synchronization of the input variables of the reduced-order expanded state observer; the lead-lag compensation link is used to advance the total disturbance; the combination of the two can significantly improve the ability of the method of the present invention to cope with the large inertia of the superheated steam temperature system.

[0056] 2. The reduced-order extended state observer designed by the present invention can improve observation efficiency and has a faster observation speed.

[0057] 3. The present invention can improve the temperature fluctuation suppression capability of the superheated steam temperature system. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 These are the implementation steps of the method of the present invention.

[0059] Figure 2 This is a structural diagram of the method and device for controlling the superheated steam temperature system of a thermal power unit based on multi-type compensation proposed by the present invention.

[0060] Figure 3 This is the control effect of the method of the present invention and other comparative methods. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0062] Example 1

[0063] This embodiment proposes a method for controlling the superheated steam temperature system of a thermal power unit based on multi-type compensation. The process is as follows: Figure 1 As shown, the control principle is as follows Figure 2 As shown, the following steps are included:

[0064] 101) Based on the operating data of the superheated steam temperature system of the thermal power unit, establish the temperature reduction water valve opening u A To superheater inlet temperature y A The state space model A and the superheater inlet temperature y A State space model B to superheater outlet temperature y;

[0065] From the opening of the cooling water valve u A To superheater inlet temperature y A The state space model A is:

[0066]

[0067] In the formula, is the state variable of the state-space model A,

[0068] is the state matrix of the state-space model A,

[0069] is the input matrix of the state-space model A, is the output matrix of the state-space model A, u A is the opening of the cooling water valve, y A is the superheater inlet temperature; m is the order of the state space model A, and m∈(1,10 10 ] and is an integer; T A are the parameters of the state space model, and T A ∈(0,10 10 ]; b A is the gain of state-space model A, and b A ∈[-10 10 ,0).

[0070] In this embodiment, m=1, T A =35, b A =-1.2 / 35.

[0071] From the superheater inlet temperature y A The state space model B to the superheater outlet temperature y is:

[0072]

[0073] In the formula, are the state variables of the state-space model B,

[0074] is the state matrix of the state-space model B,

[0075] is the input matrix of the state-space model B, is the output matrix of state-space model B, y is the superheater outlet temperature; n is the order of state-space model B, n∈(1,10 10 ] and is an integer; T is the parameter of the state space model B, and T∈(0,10 10 ]; b is the gain of the state space model B, and b∈(0,10 10 ].

[0076] In this embodiment, n=3, T=35, and b=1.2 / 35.

[0077] 102) Design superheater inlet temperature y A Settings (i.e., the output of the outer loop controller) is an input inertia compensation link of order ni based on the state space model, and i∈[1,n];

[0078] The expression of input inertia compensation link is:

[0079]

[0080] In the formula, is the state variable of the input inertia compensation link;

[0081] is the state matrix of the input inertia compensation link;

[0082] is the input matrix of the inertia compensation link, is the superheater inlet temperature y A The setting value of

[0083] In this embodiment, i=2.

[0084] 103) The output of the input inertia compensation link obtained in step 102) is and the superheater outlet temperature y are sent to the j-th order reduced-order extended state observer;

[0085] The j-order reduced-order extended state observer is designed as follows:

[0086] If j = 1, the reduced-order extended state observer is:

[0087]

[0088] If j ≥ 2, the reduced-order extended state observer is:

[0089]

[0090] Where i≤j, i=2,3,…,j+1, ξ2, ξ i and j+1 are intermediate variables, z2, z i and z j+1 is the output of the reduced-order extended state observer, which is also the state estimate of the state-space model B; l1, l i and l j is the gain of the reduced-order extended state observer, is the parameter that needs to be adjusted; b0 is the estimated value of the gain b of the state-space model B, is the parameter that needs to be adjusted.

[0091] In this embodiment, j=2, b0=0.1, l1=0.4, l i =0.04.

[0092] It should be noted that the parameters that need to be adjusted (hereinafter the same) refer to the parameters that are designed. The specific values ​​to be used can be determined by a variety of adjustment methods, wherein the adjustment methods can adopt existing methods, which are not specifically discussed in the present invention. The parameters that need to be adjusted are given as given values ​​and are directly given when the present invention is specifically implemented.

[0093] 104) Based on the output z of the j-th order reduced-order extended state observer obtained in step 103) j+1 Design lead-lag compensation link;

[0094] The designed lead-lag compensation link is:

[0095]

[0096] Where, T m is the time constant of the lead-lag compensation link, λ is the coefficient of the lead-lag compensation link, z a,j+1 is the output of the lead-lag compensation link; T m and λ are the parameters that need to be adjusted.

[0097] In this embodiment, T m =10,λ=0.1.

[0098] 105) Based on the output z of the j-order reduced-order extended state observer obtained in step 3) j+1 The output z of the lead-lag compensation link obtained in step 104) a,j+1 and the superheater outlet temperature set point r to design the control law;

[0099] The expression of the designed control law is as follows:

[0100]

[0101] Where k1, k i and k j is the gain of the control law, is the parameter that needs to be adjusted; u1 is the output of the control law.

[0102] In this embodiment, k1=0.04, k i =0.4.

[0103] 106) Set the superheater inlet temperature y A Settings (ie, the output of the outer loop controller) is updated to the output u1 of the control law, with the output u1 of the control law and the superheater inlet temperature y A Design an inner loop controller for the input, use PI / PID or conventional first-order / second-order ADRC to design the inner loop controller, and update the cooling water valve opening u according to the output of the inner loop controller A , completing the cascade control of the superheated steam temperature system of the thermal power unit.

[0104] In this embodiment, the inner loop controller adopts a PI controller, and its parameters are a proportional gain of -1.354 and an integral gain of -0.052.

[0105] Comparative experiment

[0106] In order to analyze the effectiveness of the method of the present invention, the improved ADRC proposed in patent CN201810041569.0 is added as the outer loop controller of the cascade control system, and the inner loop controller is consistent with this embodiment. The parameters of the comparison method are ω c =0.2, ω0=0.2, b0=0.1 and G cp (s) = 1 / (35s+1) 2 , the comparison effect under nominal working conditions is as follows Figure 3 shown.

[0107] The specific simulation process is as follows: at the beginning of the simulation, the system is in a steady state, at 10 seconds the set value is changed from 0 to 1, at 1500 seconds the closed loop is disturbed by the control quantity, from 0 to 5, until the simulation ends at 3000 seconds. The thick solid line is the method of the present invention, and the dotted line is the comparative method. Figure 3 It can be seen that the method of the present invention has a faster tracking speed and a stronger anti-interference ability, showing the best control quality.

[0108] Example 2

[0109] Based on the same inventive concept, the embodiment of the present application also provides a thermal power unit superheated steam temperature system control system based on multi-type compensation. The implementation scheme for solving the problem provided by the thermal power unit superheated steam temperature system control system based on multi-type compensation is similar to the implementation scheme recorded in the method of Example 1, so the specific limitations in one or more embodiments of the thermal power unit superheated steam temperature system control system based on multi-type compensation provided below can refer to the limitations of the method in Example 1, and will not be repeated here.

[0110] In an exemplary embodiment, a control system for a superheated steam temperature system of a thermal power plant based on multi-type compensation is provided, comprising:

[0111] The state space model module presets the state space model A and the state space model B; the state space model A is based on the operation data of the superheated steam temperature system of the thermal power unit, and is established from the desuperheating water valve opening u A To superheater inlet temperature y A The state space model B is based on the operation data of the superheated steam temperature system of the thermal power unit, and is established from the superheater inlet temperature y A To the state space model of superheater outlet temperature y;

[0112] Input inertia compensation module, the input end is connected to the superheater inlet temperature y A Settings The input inertia compensation link is the superheater inlet temperature y A Settings The ni-order input inertia compensation link based on the state space model, and i∈[1,n];

[0113] The input of the extended state observer module is connected to the output of the input inertia compensation module. and superheater outlet temperature y; the extended state observer is based on the output of the input inertia compensation module and the j-order reduced-order extended state observer designed for the superheater outlet temperature y;

[0114] Lead-lag compensation module, the input end is connected to the output z of the extended state observer module j+1 ; The lead-lag compensation link is based on the output z of the j-order reduced-order extended state observer j+1 designed;

[0115] The control law module has its input connected to the output z of the extended state observer module. j+1 , the output of the lead-lag compensation module z a,j+1 and the superheater outlet temperature set value r; the control law is based on the output z of the j-th order reduced-order extended state observer j+1 , the output of the lead-lag compensation link za,j+1 and the superheater outlet temperature set point r;

[0116] A cascade control module, the input end of which is connected to the output u1 of the control law module, and includes an outer loop controller update module and an inner loop controller module;

[0117] The outer loop controller update module is used to update the superheater inlet temperature y A Settings Update to the output u1 of the control law module;

[0118] The inner loop controller module uses the output u1 of the control law module and the superheater inlet temperature y A As input, the inner loop controller is designed using PI / PID or conventional first-order / second-order active disturbance rejection control;

[0119] The output of the inner loop controller module is updated to the cooling water valve opening u of the state space model module A , completing the cascade control of the superheated steam temperature system of the thermal power unit.

[0120] Example 3

[0121] Each module in the above system can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module above.

[0122] In an exemplary embodiment, a controller of a superheated steam temperature system of a thermal power unit based on multi-type compensation is provided, and the computer device can be a terminal. The computer device also includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, the steps of the control method of the superheated steam temperature system of a thermal power unit based on multi-type compensation are implemented. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0123] Those skilled in the art will appreciate that the structure of the above-mentioned computer device is only a partial structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components, or combine certain components, or have a different arrangement of components.

[0124] In an exemplary embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of a method for controlling a superheated steam temperature system of a thermal power unit based on multi-type compensation are implemented.

[0125] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0126] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0127] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for controlling the superheated steam temperature system of a thermal power unit based on multi-type compensation, characterized in that: The following steps are involved: 1) Based on the operating data of the superheated steam temperature system of the thermal power unit, establish the temperature reduction water valve opening u A To superheater inlet temperature y A The state space model A and the superheater inlet temperature y A State space model B to superheater outlet temperature y; 2) Design superheater inlet temperature yA setting value The input inertia compensation link of order ni based on the state space model, and i∈[1,n]; 3) Input the output of the inertia compensation link and the superheater outlet temperature y are sent to the j-th order reduced-order extended state observer; 4) Based on the output z of the j-th order reduced-order extended state observer j+1 Design lead-lag compensation link; 5) Based on the output z of the j-th order reduced-order extended state observer j+1 , the output of the lead-lag compensation link z a，j+1 and the superheater outlet temperature set point r to design the control law; 6) Set the superheater inlet temperature y A Settings That is, the output of the outer loop controller is updated to the output u1 of the control law, with the output u1 of the control law and the superheater inlet temperature y A Design an inner loop controller for the input, use PI / PID or conventional first-order / second-order ADRC to design the inner loop controller, and update the cooling water valve opening u according to the output of the inner loop controller A , completing the cascade control of the superheated steam temperature system of the thermal power unit.

2. The method for controlling the superheated steam temperature system of a thermal power plant based on multi-type compensation according to claim 1, characterized in that: From the opening of the cooling water valve u A To superheater inlet temperature y A The state space model A is: In the formula, is the state variable of the state-space model A, is the state matrix of the state-space model A, is the input matrix of the state-space model A, is the output matrix of the state-space model A, u A is the opening of the cooling water valve, y A is the superheater inlet temperature; m is the order of the state space model A, and m∈(1, 10 10 ] and is an integer; T A are the parameters of the state space model, and T A ∈(0,10 10 ]; b A is the gain of state-space model A, and b A ∈[-10 10 , 0); From the superheater inlet temperature y A The state space model B to the superheater outlet temperature y is: In the formula, are the state variables of the state-space model B, is the state matrix of the state-space model B, is the input matrix of the state-space model B, is the output matrix of state-space model B, y is the superheater outlet temperature; n is the order of state-space model B, n∈(1, 10 10 ] and is an integer; T is the parameter of the state space model B, and T∈(0, 10 10 ]; b is the gain of the state space model B, and b∈(0, 10 10 ].

3. The method for controlling the superheated steam temperature system of a thermal power plant based on multi-type compensation according to claim 2, characterized in that: The expression of input inertia compensation link is: In the formula, is the state variable of the input inertia compensation link; is the state matrix of the input inertia compensation link; is the input matrix of the inertia compensation link, is the set value of the superheater inlet temperature yA.

4. The method for controlling the superheated steam temperature system of a thermal power plant based on multi-type compensation according to claim 3 is characterized in that: The j-order reduced-order extended state observer is designed as follows: If j = 1, the reduced-order extended state observer is: If j ≥ 2, the reduced-order extended state observer is: Where i≤j, i=2, 3, ..., j+1, ξ2, ξ i and j+1 are intermediate variables, z2, z i and z j+1 is the output of the reduced-order extended state observer, which is also the state estimate of the state-space model B; l1, l i and l j is the gain of the reduced-order extended state observer, is the parameter that needs to be adjusted; b0 is the estimated value of the gain b of the state-space model B, is the parameter that needs to be adjusted.

5. The method for controlling the superheated steam temperature system of a thermal power plant based on multi-type compensation according to claim 4, characterized in that: The designed lead-lag compensation link is: Where, T m is the time constant of the lead-lag compensation link, λ is the coefficient of the lead-lag compensation link, z a，j+1 is the output of the lead-lag compensation link; T m and λ are the parameters that need to be adjusted.

6. The method for controlling the superheated steam temperature system of a thermal power plant based on multi-type compensation according to claim 5, characterized in that: The expression of the designed control law is as follows: Where k1, k i and k j is the gain of the control law, is the parameter that needs to be adjusted; u1 is the output of the control law.

7. A control system for superheated steam temperature system of thermal power unit based on multi-type compensation, characterized in that: include: The state space model module presets the state space model A and the state space model B; the state space model A is based on the operation data of the superheated steam temperature system of the thermal power unit, and is established from the desuperheating water valve opening u A To superheater inlet temperature y A The state space model B is based on the operation data of the superheated steam temperature system of the thermal power unit, and is established from the superheater inlet temperature y A To the state space model of superheater outlet temperature y; Input inertia compensation module, the input end is connected to the superheater inlet temperature y A Settings Input inertia compensation link is the superheater inlet temperature yA set value The ni-order input inertia compensation link based on the state space model, and i∈[1,n]; The input of the extended state observer module is connected to the output of the input inertia compensation link module. and superheater outlet temperature y; The extended state observer is based on the output of the input inertia compensation module. and the j-order reduced-order extended state observer designed for the superheater outlet temperature y; Lead-lag compensation module, the input end is connected to the output z of the extended state observer module j+1 ; The lead-lag compensation link is based on the output z of the j-order reduced-order extended state observer j+1 designed; Control law module, the input end is connected to the output z of the extended state observer module j+1 , the output of the lead-lag compensation module z a，j+1 and the superheater outlet temperature set value r; the control law is based on the output z of the j-th order reduced-order extended state observer j+1 , the output of the lead-lag compensation link z a，j+1 and the superheater outlet temperature set point r; A cascade control module, the input end of which is connected to the output u1 of the control law module, and includes an outer loop controller update module and an inner loop controller module; The outer loop controller update module is used to set the superheater inlet temperature yA to the set value Update to the output u1 of the control law module; The inner loop controller module uses the output u1 of the control law module and the superheater inlet temperature y A As input, the inner loop controller is designed using PI / PID or conventional first-order / second-order active disturbance rejection control; The output of the inner loop controller module is updated to the cooling water valve opening u of the state space model module A , completing the cascade control of the superheated steam temperature system of the thermal power unit.

8. A controller for a superheated steam temperature system of a thermal power plant based on multi-type compensation, characterized in that: include: one or more processors; a memory for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors execute the steps of the method for controlling the superheated steam temperature system of a thermal power unit based on multi-type compensation as described in any one of claims 1 to 6.

9. A computer-readable storage medium storing a computer program, characterized in that: When the program is executed by a processor, the steps of the method for controlling the superheated steam temperature system of a thermal power unit based on multi-type compensation as described in any one of claims 1 to 6 are implemented.

Images