CN114893305A

Movatterモバイル変換

Info

Publication number: CN114893305A
Application number: CN202210572795.8A
Authority: CN
Inventors: 张莉; 张方; 姜海明; 郑瑞祥; 吴学崇; 周晟阳; 许伟强; 蔚伟; 张瑞臣
Original assignee: Huadian Electric Power Research Institute Co Ltd
Current assignee: Huadian Electric Power Research Institute Co Ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-08-12
Anticipated expiration: 2042-05-20
Also published as: CN114893305B

Abstract

Description

Control method and system of gas unit

Technical Field

The present application relates to the field of power system control, and in particular, to a method and a system for controlling a gas turbine.

Background

The Gas Turbine (Gas Turbine) mainly comprises a Gas Compressor (Compressor), a combustion chamber (Comburstion) and a Gas Turbine (Turbine), wherein air is sucked into the Gas Compressor from the outside, the Gas Compressor is pressurized and heated, high-pressure air and fuel (natural Gas, coal Gas and the like) are mixed and combusted in the combustion chamber to form high-pressure high-temperature Gas, the Gas expands in the Gas Turbine to do work, and the heat energy of the Gas is converted into the mechanical energy of a Turbine rotor, so that an external load rotor is driven to rotate at a high speed.

In the actual operation process of the gas turbine, if the exhaust pressure of the gas compressor is higher, the combustion temperature may be too high, and further, the over-temperature phenomenon of the unit may be caused. If the exhaust pressure is high for a long time, the compressor is in a high-frequency full load/high load carrying state, and the service life of the compressor is also adversely affected.

Disclosure of Invention

The embodiment of the application provides a control method and a control system of a gas unit, and aims to at least solve the problem that the safety of the gas unit is low due to overtemperature in the related technology.

In a first aspect, an embodiment of the present application provides a method for controlling a gas turbine, where the method includes:

acquiring historical working condition data of the gas turbine unit, acquiring a plurality of groups of mutually matched rotating speed ratios, IGV opening degrees and pressure ratio limit values from the historical working condition data, and respectively representing the rotating speed ratios, the IGV opening degrees and the pressure ratio limit values as a rotating speed ratio function, an IGV opening degree function and a pressure ratio limit value function;

obtaining a pressure ratio limit value three-dimensional broken line function through a pressure ratio limit value simulation model based on the rotating speed ratio function, the IGV opening function and the pressure ratio limit value function;

acquiring a current rotating speed ratio and a current IGV opening degree from current working condition data of the gas turbine unit, and acquiring a current pressure ratio limit value matched with a field working condition based on the current rotating speed ratio and the current IGV opening degree through the three-dimensional broken line function;

and determining whether to trigger unit operation limit protection according to the current pressure ratio limit value, and respectively generating control instructions of the IBH system and the FSR system by taking the current pressure ratio limit value as an influence parameter.

In some embodiments, obtaining the pressure ratio limit three-dimensional polygonal line function through the pressure ratio limit simulation model includes:

defining the rotation speed ratio function as a first input function of the pressure ratio limit simulation model, and defining the IGV opening function as a second input function of the pressure ratio limit simulation model;

defining the pressure ratio limit function as an output function of the pressure ratio limit simulation model;

and performing three-dimensional fitting through a binary interpolation method based on multiple groups of first input functions, multiple groups of second input functions and multiple groups of output functions by the pressure ratio limit value simulation model to obtain the three-dimensional broken line function of the pressure ratio limit value.

In some embodiments, the rotation speed ratio data and the IGV opening degree data are corrected by a preset correction factor during the process of respectively correcting the rotation speed ratio and the IGV opening degree.

In some embodiments, the preset correction coefficient is obtained by:

acquiring the current inlet temperature and the current inlet atmospheric pressure of the compressor, and obtaining the preset correction coefficient through a preset formula based on the current inlet temperature, the current inlet atmospheric pressure and the standard atmospheric pressure;

wherein the preset formula is as follows:

CQPC is an atmospheric pressure correction parameter, P_n Is the current atmospheric pressure of the inlet, P_s Is the standard atmospheric pressure, 519 and 460 are formula constants, and CTIM is the inlet current temperature.

In some embodiments, determining whether to trigger the unit operation limit protection according to the current pressure ratio limit value includes:

acquiring a current pressure ratio limit value and a current pressure ratio value in the actual operation process of the gas turbine set;

and judging whether the difference value between the current pressure ratio limit value and the current pressure ratio value is greater than a preset deviation threshold value, and if so, triggering unit operation limit protection.

In some embodiments, the generating a control instruction of the IBH system with the current pressure ratio limit as an influencing parameter includes:

acquiring a current pressure ratio of the gas turbine unit, and acquiring a current pressure ratio deviation based on the current pressure ratio and the pressure ratio limit value;

acquiring a first preset influence coefficient of the current pressure ratio deviation on an IBH system and an original IBH instruction, and carrying out inertial delay processing on the original IBH instruction;

and generating the IBH control instruction for controlling the actual output value of the IBH system based on the current pressure ratio deviation, the first preset influence coefficient and the original IBH instruction after inertial delay processing.

In some embodiments, generating FER control instructions for the gas turbine unit with the current pressure ratio limit as a reference comprises:

acquiring a second preset influence coefficient of the pressure ratio deviation on the FSR system and an original FSR instruction, and carrying out inertia delay processing on the original FSR instruction;

and generating the FSR control instruction for controlling the actual output value of the FSR system based on the current pressure ratio deviation, the second preset influence coefficient and the initial FSR instruction after inertial delay processing.

In a second aspect, an embodiment of the present application provides a control system for a gas turbine, where the system includes: the device comprises an acquisition module, a simulation module and a control module, wherein the acquisition module, the simulation module and the control module are connected with the simulation module;

the acquisition module is used for acquiring historical working condition data of the gas turbine unit, acquiring a plurality of groups of mutually matched rotating speed ratios, IGV opening degrees and pressure ratio limit values from the historical working condition data, and respectively representing the rotating speed ratios, the IGV opening degrees and the pressure ratio limit values as a rotating speed ratio function, an IGV opening degree function and a pressure ratio limit value function;

the simulation module is used for obtaining a pressure ratio limit value three-dimensional broken line function through a pressure ratio limit value simulation model based on the rotating speed ratio function, the IGV opening function and the pressure ratio limit value function;

the control module is used for acquiring a current rotating speed ratio and a current IGV opening degree from current working condition data of the gas turbine unit, and acquiring a current pressure ratio limit value matched with a field working condition and a current pressure ratio limit value matched with the field working condition based on the current rotating speed ratio and the current IGV opening degree through the three-dimensional broken line function

In a third aspect, an embodiment of the present application provides a computer device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor, when executing the computer program, implements the method according to the first aspect.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the method according to the first aspect.

Compared with the prior art, the control method of the gas turbine set provided by the embodiment of the application acquires multiple groups of mutually matched rotating speed ratios, IGV opening degrees and pressure ratio limit values by acquiring historical working condition data of the gas turbine set, and respectively expresses the rotating speed ratios, the IGV opening degrees and the pressure ratio limit values as rotating speed ratio functions, IGV opening degree functions and pressure ratio limit value functions;

obtaining a pressure ratio limit value three-dimensional broken line function through a pressure ratio limit value simulation model based on a rotating speed ratio function, an IGV opening function and a pressure ratio limit value function; acquiring a current rotating speed ratio and a current IGV opening degree from current working condition data of the gas turbine unit, and acquiring a current pressure ratio limit value matched with a field working condition based on the current rotating speed ratio and the current IGV opening degree through a three-dimensional polygonal line function; and determining whether to trigger unit operation limit protection according to the current pressure ratio limit value, and respectively generating control instructions of the IBH system and the FSR system by taking the current pressure ratio limit value as an influence parameter. The problem of relatively poor security of gas unit among the correlation technique is solved to optimize the protection of pressure ratio restriction to combustion process FSR, ensure the unit and stabilize safe operation.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a flowchart of a control method of a gas turbine plant according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a pressure ratio limit simulation model according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a three-dimensional polyline function according to an embodiment of the present application.

Fig. 4 is a block diagram of a control system of a gas turbine plant according to an embodiment of the present application;

fig. 5 is an internal structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.

It is obvious that the drawings in the following description are only examples or embodiments of the present application, and that it is also possible for a person skilled in the art to apply the present application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as referred to herein means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.

Fig. 1 is a flowchart of a control method of a gas turbine plant according to an embodiment of the present application, where the flowchart includes the following steps, as shown in fig. 1:

s101, collecting historical working condition data of a gas turbine set, obtaining a plurality of groups of mutually matched rotating speed ratios, IGV opening degrees and pressure ratio limit values from the historical working condition data, and respectively representing the rotating speed ratios, the IGV opening degrees and the pressure ratio limit values as a rotating speed ratio function, an IGV opening degree function and a pressure ratio limit value function;

the gas unit can be a 9E gas unit, and correspondingly, the historical working condition data is accumulated operation data of the 9E gas unit in the actual application process. Optionally, the data may be obtained from a log and an explanatory document of the gas turbine unit control system, or may be obtained from a historical database which is set by each power unit.

Further, the above-mentioned rotation ratio is a ratio of an actual rotation value to a reference rotation value, and in the case of a 9E gas turbine unit, the reference rotation value is 3000, and if the actual rotation value is 2800, the rotation ratio is 93. Further, the IGV opening degree is collectively referred to as an (inlet guide vane) opening degree, which is used to control the intake air amount. The pressure ratio limit is a critical value of the compression ratio of the compressor, and it can be understood that the pressure ratio limit is determined according to actual working conditions on site, and can be obtained from the prior art.

Further, the specific number of the above-mentioned multiple sets of data should satisfy some basic requirements, for example, not less than 64 sets. Theoretically, the more the data amount is, the more the accuracy of the subsequent simulation process is improved, but the calculation amount is increased, and the skilled person in the art knows from experience that 64 groups of data can satisfy the simulation requirement, and meanwhile, the calculation amount is reasonable.

Further, representing the above data as a functional form is a conventional technical means in the art, and therefore, the description thereof is omitted in this embodiment.

S102, obtaining a pressure ratio limit value three-dimensional broken line function through a pressure ratio limit value simulation model based on a rotating speed ratio function, an IGV opening function and a pressure ratio limit value function;

the above speed ratio function can be expressed as: {90, 92.5, 95, 97, 100, 105, 110, 115 };

the IGV opening function may be expressed as: {42, 44, 49, 56, 66, 78, 84, 86 };

the pressure ratio limit function can be expressed as:

{7.1030，7.3585，7.9245，8.5601，9.0457，9.5310，9.9000，10.0400，7.9063，8.2213，8.8822，9.8102，10.1738，10.7596，11.1423，11.2853，8.3380，8.7019，9.5443，10.4727，11.0894，11.8200，12.1800，12.3000，8.4840，8.8683，9.8037，10.7319，11.6764，12.5430，12.8710，12.9630，8.2533，8.6803，9.6755，10.9142，12.3264，13.4075，13.6894，13.7408，6.91，7.5688，9.0898，10.91，12.8801，14.2518，14.53，14.56，5.38，6.3268，8.4283，10.7806，13.1029，14.5674，14.83，14.9，3.8，4.9705，7.5522，10.4002，13.0982，14.5751，14.8300，14.9}；

optionally, the simulation process of step S102 may be implemented in a MATLAB software environment, and fig. 2 is a schematic diagram of a pressure ratio limit simulation model according to an embodiment of the present application.

In an MATLAB software environment, a rotation speed ratio function is defined as a first model input function X1, an IGV opening function is defined as a second model input function X2, and a pressure ratio limiting function is defined as a model output quantity Y;

through the pressure ratio limit simulation model, three-dimensional fitting is performed through a binary interpolation method based on multiple groups of first input functions, multiple groups of second input functions and multiple groups of output functions, so that a pressure ratio limit three-dimensional polygonal line function is obtained, and fig. 3 is a schematic diagram of the three-dimensional polygonal line function according to the embodiment of the application.

S103, acquiring a current rotating speed ratio and a current IGV opening degree from current working condition data of the gas turbine unit, and acquiring a current pressure ratio limit value matched with a field working condition based on the current rotating speed ratio and the current IGV opening degree through a three-dimensional polygonal line function;

in step S102, a three-dimensional polygonal line function of the pressure ratio limit is obtained, and the three-dimensional polygonal line function of the pressure ratio limit is obtained according to historical field data. Therefore, when the three-dimensional broken line function is applied to a brand-new gas unit, the unit can match the current rotating speed ratio and the IGV opening degree in the field operation process through the three-dimensional broken line function when operating, and further obtain the pressure ratio limit value matched with the field working condition.

It should be noted that, for the 9E gas turbine unit, the change of the rotation speed ratio and the IGV opening degree is always fluctuated within a certain range, and in the simulation process of the step S102, the simulation training is performed by using the upper and lower limit values and the partial interval values, so that when the three-dimensional polygonal line function obtained by simulation is used for the operation control of a new unit, all the field conditions can be covered.

And S104, determining whether to trigger unit operation limit protection according to the current pressure ratio limit value, and respectively generating control instructions of the IBH system and the FSR system by taking the current pressure ratio limit value as an influence parameter.

And triggering unit operation limit protection if the current actual pressure ratio value exceeds the current pressure ratio limit value or the difference value between the current actual pressure ratio value and the current pressure ratio limit value reaches a certain range.

Furthermore, the IBH system is fully called as an inlet air heating system, is an important auxiliary system of a 9E combustion engine, and realizes inlet air heating of the compressor by sending a small amount of exhaust air of the last stage of the compressor back to an air inlet of the compressor. The IBH system has the main function of preventing the output reduction or damage caused by the icing of the blades of the compressor under the cold weather condition, and in addition, when the combustion engine runs at low load, the IBH can extract partial exhaust of the compressor, improve the exhaust temperature of the combustion engine, maintain the exhaust temperature at a higher level and play a role in supporting combustion.

Whereas the FSR (FUEL STROKE REFERENCE) system, which may be understood as a combustion control system, controls the combustion process by the output of FUEL, wherein the pressure ratio limit is one of the important parameters affecting the generation of the IBH command and the FSR command.

Through the steps from S101 to S104, the three-dimensional broken line function is obtained through the simulation model based on historical working condition data, and after the three-dimensional broken line function is applied to a new gas unit, the gas unit can obtain a corresponding pressure ratio limit value according to the field working condition, and then the pressure ratio limit value is applied to guarantee the safe operation of the gas unit.

In some embodiments, since the selected rotation speed ratio and the IGV opening are standard values, in order to make the model simulation result closer to the actual situation on site, optionally, the rotation speed ratio and the IGV opening may be corrected, and the corrected parameters are used for simulation training, so as to obtain a three-dimensional polygonal line function with a more accurate effect, which specifically includes:

in the process of respectively representing the rotation speed ratio and the IGV opening degree as a rotation speed ratio function and an IGV opening degree function, correcting the rotation speed ratio data and the IGV opening degree data by using a preset correction coefficient, wherein the preset correction coefficient for correction is obtained by the following steps:

acquiring the current inlet temperature and the current inlet atmospheric pressure of the compressor, and obtaining a preset correction coefficient through a preset formula based on the current inlet temperature, the current inlet atmospheric pressure and the standard atmospheric pressure;

CQPC is an atmospheric pressure correction parameter, P_n Is the current atmospheric pressure at the inlet, P_s Is standard atmospheric pressure, 519 and 460 are formula constants, and CTIM is inlet temperature. Through the preset formula, the influence of factors such as the on-site atmospheric pressure and temperature on the pressure ratio limit value is fully considered, and the standard value is corrected, so that the accuracy of the three-dimensional broken line function is improved.

In some embodiments, determining whether to trigger the unit operation limit protection according to the current pressure ratio limit value includes: acquiring a current pressure ratio limit value and a current pressure ratio value in the actual operation process of the gas turbine unit; and judging whether the difference value between the current pressure ratio limit value and the current pressure ratio value is greater than a preset deviation threshold value, if so, determining that the unit operation limit protection is triggered, tripping the unit and keeping after the signal is triggered, and resetting through an L86MR 1. Optionally, when determining whether to trigger the unit operation limit protection, if the current voltage ratio value exceeds the range, the unit operation limit protection may be triggered after a certain time delay (e.g., 3S).

In some embodiments, the generating the control instruction of the IBH system with the current pressure ratio limit as an influencing parameter includes: acquiring a current pressure ratio of the gas turbine unit, and acquiring a current pressure ratio deviation based on the current pressure ratio and a pressure ratio limit value; acquiring a first preset influence coefficient of the current pressure ratio deviation on an IBH system and an original IBH instruction, and carrying out inertia delay processing on the original IBH instruction; and generating an IBH control instruction for controlling an actual output value of the IBH system based on the current pressure ratio deviation, the first preset influence coefficient and the original IBH instruction after the inertia delay processing, wherein the IBH instruction can be in a valve opening or power ratio form.

Wherein, the first preset influence coefficient is an influence coefficient of the deviation of the pressure ratio on the IBH, which may be selected as-30, and the inertial delay processing specifically includes: passing the original IBH instruction through a transfer function

And (6) performing operation.

It should be noted that when the following conditions are satisfied at the same time, namely, the compressor limit control is considered to be failed, in this case, the output value of the IBH system is configured to be a constant value 128;

condition 1: the deviation of the pressure reaches a limit, LCPRERR

Condition 2: the atmospheric pressure reaches a high limit, namely the atmospheric pressure is greater than 32.2679 Inhg;

condition 3: the command and feedback deviation of the IBH valve is more than 10 percent and 15 percent, and the rotating speed percentage is more than or equal to 95 percent;

in some embodiments, generating FER control commands for the gas turbine plant with reference to the current pressure ratio limit comprises: acquiring a second preset influence coefficient of the pressure ratio deviation on the FSR system and an original FSR instruction, and performing inertia delay processing on the original FSR instruction; and generating an FSR control command for controlling the actual output value of the FSR system based on the current pressure ratio deviation, the second preset influence coefficient and the initial FSR command after inertial delay processing.

Wherein, the second preset influence coefficient is an influence coefficient of the deviation of the pressure ratio on the FSR system, which may be selected as 12, and further, the inertia delay processing specifically includes: passing the original FSR instruction through a transfer function

And (6) performing operation.

In some of these embodiments, where the current pressure ratio value is less than the pressure ratio limit, the output value of the current FSR control command is integrated upward to exit control; and under the condition that the current pressure ratio value is greater than the pressure ratio limit value, continuously integrating the current FSR control instruction downwards until the current pressure ratio value is less than or equal to the pressure ratio limit value, so that the damage to equipment caused by overlarge pressure difference between stages of the blades of the compressor is avoided.

In some of these embodiments, the pressure ratio limiting FSR backup control is activated when the value of the last operational cycle of the output value (FSRCPR) of the FSR control system is less than the value of the FSR of the current operational cycle.

Triggering the IGV to maintain current values (LFSRCPR1 ═ I) when the following conditions are met

Condition 1: voltage ratio limited FSR standby control activation

Condition 2: and (5) grid connection.

When the signal is triggered, if the deviation amount of the voltage ratio is larger than-0.15, resetting is carried out.

It should be noted that the steps illustrated in the above-described flow diagrams or in the flow diagrams of the figures may be performed in a computer system, such as a set of computer-executable instructions, and that, although a logical order is illustrated in the flow diagrams, in some cases, the steps illustrated or described may be performed in an order different than here.

The present embodiment further provides a control system of a gas turbine, which is used to implement the foregoing embodiments and preferred embodiments, and the description of the system is omitted. As used hereinafter, the terms "module," "unit," "subunit," and the like may implement a combination of software and/or hardware for a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 4 is a block diagram of a control system of a gas turbine plant according to an embodiment of the present application, and as shown in fig. 4, the system includes: anacquisition module 40, asimulation module 41 and acontrol module 42, wherein;

theacquisition module 40 is used for acquiring historical working condition data of the gas turbine unit, acquiring a plurality of groups of mutually matched rotation speed ratios, IGV opening degrees and pressure ratio limit values from the historical working condition data, and respectively representing the groups of mutually matched rotation speed ratios, IGV opening degrees and pressure ratio limit values as a rotation speed ratio function, an IGV opening degree function and a pressure ratio limit value function;

thesimulation module 41 is configured to obtain a pressure ratio limit three-dimensional polygonal line function through a pressure ratio limit simulation model based on a rotation speed ratio function, an IGV opening function, and a pressure ratio limit function;

thecontrol module 42 is configured to obtain a current rotation speed ratio and a current IGV opening from current operating condition data of the gas turbine unit, obtain a current pressure ratio limit value matched with a field operating condition based on the current rotation speed ratio and the current IGV opening through a three-dimensional polygonal line function, determine whether to trigger unit operation limit protection according to the current pressure ratio limit value, and generate control instructions of the IBH system and the FSR system respectively by using the current pressure ratio limit value as an influence parameter.

In one embodiment, a computer device is provided, which may be a terminal. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile 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 an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of controlling a gas turbine. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.

In one embodiment, fig. 5 is a schematic diagram of an internal structure of an electronic device according to an embodiment of the present application, and as shown in fig. 5, an electronic device is provided, where the electronic device may be a server, and the internal structure diagram may be as shown in fig. 5. The electronic device comprises a processor, a network interface, an internal memory and a non-volatile memory connected by an internal bus, wherein the non-volatile memory stores an operating system, a computer program and a database. The processor is used for providing calculation and control capability, the network interface is used for communicating with an external terminal through network connection, the internal memory is used for providing an environment for an operating system and the running of a computer program, the computer program is executed by the processor to realize a control method system of the gas unit, and the database is used for storing data.

Those skilled in the art will appreciate that the configuration shown in fig. 5 is a block diagram of only a portion of the configuration associated with the present application, and does not constitute a limitation on the electronic device to which the present application is applied, and a particular electronic device may include more or less components than those shown in the drawings, or may combine certain components, or have a different arrangement of components.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A method for controlling a gas turbine, the method comprising:

2. The method of claim 1, wherein obtaining the pressure ratio limit three-dimensional polyline function through a pressure ratio limit simulation model comprises:

3. The method of claim 1, wherein the speed ratio data and the IGV opening degree data are corrected using preset correction coefficients during the process of comparing the speed ratio and the IGV opening degree to a speed ratio function and an IGV opening degree function, respectively.

4. The method according to claim 3, wherein the preset correction factor is obtained by:

wherein the preset formula is as follows:

5. The method of claim 1, wherein determining whether to trigger unit operation limit protection based on the current pressure ratio limit comprises:

6. The method of claim 1, wherein generating control instructions for an IBH system using the current pressure ratio limit as an influencing parameter comprises:

acquiring a first preset influence coefficient of the current pressure ratio deviation on an IBH system, acquiring an original IBH instruction, and performing inertia delay processing on the original IBH instruction;

7. The method of claim 4, wherein generating FER control commands for the gas unit based on the current pressure ratio limit comprises:

acquiring a second preset influence coefficient of the pressure ratio deviation on the FSR system, acquiring an original FSR instruction, and performing inertia delay processing on the original FSR instruction;

and generating the FSR control instruction for controlling the actual output value of the FSR system based on the current pressure ratio deviation, the second preset influence coefficient and the initial FSR instruction after inertia delay processing.

8. A control system for a gas turbine, the system comprising: the device comprises an acquisition module, a simulation module and a control module, wherein the acquisition module, the simulation module and the control module are connected with the simulation module;

9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 7.