Operation control method and device of steam turbine unit, electronic equipment and storage medium

Abstract

The present disclosure provides a method for operating control of a steam turbine unit. The method is applied to a steam turbine unit, which comprises a medium-pressure cylinder and a boiler. The method comprises: in response to monitoring that the steam turbine unit is in a zero-output heating working condition and receiving an electric load adjustment instruction, obtaining initial operating parameters of the boiler when the steam turbine unit is in a pure condensing working condition and a first exhaust heating extraction flow of the medium-pressure cylinder when the steam turbine unit is in the zero-output heating working condition, determining influence degree information of the exhaust heating extraction flow of the medium-pressure cylinder on an electric load amount of the steam turbine unit, the influence degree information representing an influence degree of the exhaust heating extraction flow on the electric load amount, determining an electric load advance control margin of the steam turbine unit according to the first exhaust heating extraction flow and the influence degree information, and controlling operation of the steam turbine unit according to the initial operating parameters and the electric load advance control margin. Thus, the electric load response rate of the steam turbine unit can be ensured while the steam turbine unit is stably operated in the zero-output working condition.

Description

Technical Field

[0001] This disclosure relates to the field of turbine control technology, and in particular to a method, apparatus, electronic equipment and storage medium for the operation control of a steam turbine unit. Background Technology

[0002] Zero-output technology for low-pressure cylinders involves cutting off the original steam inlet pipe of the low-pressure cylinder under high-vacuum operation conditions and introducing a small amount of cooling steam through a newly added bypass pipe to achieve near-zero output operation of the low-pressure cylinder. This significantly reduces the consumption of cooling steam in the low-pressure cylinder, reduces the cold source loss of the turbine unit, and greatly improves the heating capacity, power peak-shaving capacity, and heating economy of the turbine unit. It has advantages such as low investment, flexible operation, and high thermal-electric decoupling characteristics. However, although the exhaust steam heating capacity of the intermediate-pressure cylinder can be maximized under the zero-output condition of the low-pressure cylinder, it will cause a significant change in the original steam flow rate into the low-pressure cylinder, which will deviate significantly from the design value. This will directly affect the electrical load response rate of the turbine unit, and thus affect the safe and stable operation of the turbine unit. Therefore, how to ensure the electrical load response rate of the turbine unit while controlling the turbine unit to operate stably under zero-output conditions has become a key research direction. Summary of the Invention

[0003] This disclosure aims to at least partially address the technical problems in the related art.

[0004] Therefore, the purpose of this disclosure is to provide a method, device, electronic equipment, storage medium, and computer program product for the operation control of a steam turbine unit.

[0005] The turbine unit operation control method proposed in the first aspect of this disclosure is applied to a turbine unit, which includes an intermediate-pressure cylinder and a boiler. The method includes: in response to detecting that the turbine unit is in a zero-output heating condition and receiving an electrical load adjustment command, acquiring the initial operating parameters of the boiler when the turbine unit is in a pure condensing condition, and the first exhaust steam extraction flow rate of the intermediate-pressure cylinder when the turbine unit is in a zero-output heating condition; determining the degree of influence of the exhaust steam extraction flow rate of the intermediate-pressure cylinder on the electrical load of the turbine unit, wherein the degree of influence information represents the degree of influence of the exhaust steam extraction flow rate on the electrical load; determining the electrical load advance control margin of the turbine unit based on the first exhaust steam extraction flow rate and the degree of influence information; and controlling the operation of the turbine unit based on the initial operating parameters and the electrical load advance control margin.

[0006] The turbine unit operation control device proposed in the second aspect of this disclosure is applied to a turbine unit, which includes an intermediate-pressure cylinder and a boiler. The device includes: an acquisition module, used to acquire the initial operating parameters of the boiler when the turbine unit is in pure condensing mode and the first exhaust steam extraction flow rate of the intermediate-pressure cylinder when the turbine unit is in zero-output heating mode, in response to monitoring that the turbine unit is in zero-output heating mode and receiving an electrical load adjustment command; a first determination module, used to determine the degree of influence of the exhaust steam extraction flow rate of the intermediate-pressure cylinder on the electrical load of the turbine unit, wherein the degree of influence information represents the degree of influence of the exhaust steam extraction flow rate on the electrical load; a second determination module, used to determine the electrical load advance control margin of the turbine unit based on the first exhaust steam extraction flow rate and the degree of influence information; and a control module, used to control the operation of the turbine unit based on the initial operating parameters and the electrical load advance control margin.

[0007] A third aspect of this disclosure provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the turbine unit operation control method as proposed in the first aspect of this disclosure.

[0008] The fourth aspect of this disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the turbine unit operation control method as proposed in the first aspect of this disclosure.

[0009] The fifth aspect of this disclosure provides a computer program product that, when executed by an instruction processor, performs the turbine unit operation control method as described in the first aspect of this disclosure.

[0010] The turbine unit operation control method provided in the embodiments of this disclosure can include the following beneficial effects: In response to monitoring that the turbine unit is in a zero-output heating condition and receiving an electrical load adjustment command, the method acquires the initial operating parameters of the boiler when the turbine unit is in a pure condensing condition, and the first exhaust steam extraction flow rate of the intermediate pressure cylinder when the turbine unit is in a zero-output heating condition. It then determines the degree of influence of the exhaust steam extraction flow rate of the intermediate pressure cylinder on the electrical load of the turbine unit, wherein the degree of influence information indicates the degree of influence of the exhaust steam extraction flow rate on the electrical load. Based on the first exhaust steam extraction flow rate and the degree of influence information, the method determines the electrical load advance control margin of the turbine unit. Finally, based on the initial operating parameters and the electrical load advance control margin, the method controls the operation of the turbine unit. Thus, while ensuring stable operation of the turbine unit in a zero-output condition, the method ensures the electrical load response rate of the turbine unit.

[0011] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0012] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0013] Figure 1 This is a schematic flowchart of an embodiment of the operation control method for a steam turbine unit proposed in this disclosure;

[0014] Figure 2 This is a schematic flowchart of an operation control method for a steam turbine unit according to another embodiment of this disclosure;

[0015] Figure 3 This is a schematic diagram of the structure of the operation control device for a steam turbine unit according to an embodiment of this disclosure;

[0016] Figure 4 A block diagram of an exemplary electronic device suitable for implementing embodiments of the present disclosure is shown. Detailed Implementation

[0017] Embodiments of this disclosure are described in detail below, with examples of embodiments illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are used only to explain this disclosure, and should not be construed as limiting this disclosure. Rather, embodiments of this disclosure include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0018] It should be noted that the processes of data acquisition, collection, storage, use, and processing in this disclosed technical solution comply with relevant laws and regulations and do not violate public order and good morals.

[0019] Figure 1 This is a schematic flowchart of an embodiment of the operation control method for a steam turbine unit proposed in this disclosure.

[0020] It should be noted that the execution subject of the turbine unit operation control method in this embodiment is the turbine unit operation control system. This device can be implemented by software and / or hardware. This device can be configured in electronic equipment, which may include, but is not limited to, terminals, servers, etc.

[0021] like Figure 1 As shown, the operation control method of this steam turbine unit includes:

[0022] S101: In response to the detection that the turbine unit is in zero-output heating condition and the receipt of the electrical load adjustment command, the initial operating parameters of the boiler when the turbine unit is in pure condensing condition, and the first exhaust steam extraction flow rate of the intermediate pressure cylinder when the turbine unit is in zero-output heating condition.

[0023] The turbine operation control method described in this embodiment can be applied to turbine units, such as generator sets or heating units with a rated capacity of 300 megawatts (MW), without limitation.

[0024] In this embodiment of the disclosure, the steam turbine unit includes: an intermediate-pressure cylinder, a boiler, and a low-pressure cylinder.

[0025] Among them, the zero-output heating condition refers to the operating state when the heat source in the steam turbine unit cannot provide any heat, and the pure condensation condition of the steam turbine unit refers to the operating state in which the exhaust gas discharged from the steam turbine does not contain any moisture, that is, all the moisture is condensed by the condenser.

[0026] Among them, the electrical load adjustment command can be used to trigger an increase or decrease in the electrical load of the turbine unit, without any restrictions.

[0027] Among them, the relevant operating parameters of the boiler when the steam turbine unit is in pure condensing condition can be referred to as the initial operating parameters. These initial operating parameters can be specific to, for example, the boiler feed rate and the boiler air intake rate, without any restrictions.

[0028] When the turbine unit is in zero-output heating operation, the exhaust steam flow rate of the intermediate pressure cylinder of the turbine unit for heating can be referred to as the first exhaust steam flow rate for heating.

[0029] In other words, in this embodiment of the present disclosure, when the turbine unit is detected to be in a zero-output heating condition and an electrical load adjustment command is received, in order to ensure that the turbine unit can quickly respond to the electrical load adjustment command and make adjustments while controlling the turbine unit to operate stably in a zero-output heating condition, it is necessary to control the operation of the turbine unit in a zero-output heating condition, so as to improve the load response rate of the turbine unit.

[0030] S102: Determine the degree of influence of the exhaust steam supply and extraction steam flow rate of the intermediate pressure cylinder on the electrical load of the turbine unit. The degree of influence information indicates the degree of influence of the exhaust steam supply and extraction steam flow rate on the electrical load.

[0031] Understandably, during the operation of a steam turbine unit, as the exhaust steam flow rate of the intermediate pressure cylinder increases, it can be used for heating and industrial purposes, reducing the operating costs of boilers and other heating equipment. However, the output power of the steam turbine unit will decrease, resulting in a decrease in electrical load.

[0032] Among them, the degree of impact information can indicate the degree of impact of exhaust steam extraction flow rate on the electrical load. This degree of impact information can be specifically, for example, the degree of impact level, and the change in the electrical load of the turbine unit under the unit change of exhaust steam extraction flow rate. There are no restrictions on this.

[0033] In some embodiments, determining the degree of influence of the exhaust steam extraction flow rate of the intermediate pressure cylinder on the electrical load of the turbine unit can be achieved by monitoring the electrical load of the turbine unit and the exhaust steam extraction flow rate of the intermediate pressure cylinder during turbine unit operation, and then fitting a relationship function between the exhaust steam extraction flow rate and the electrical load based on the monitored data, and using the fitted relationship function as the degree of influence information.

[0034] In other embodiments, determining the degree of influence of the exhaust steam supply and extraction steam flow rate of the intermediate pressure cylinder on the electrical load of the turbine unit can also be achieved by adjusting the exhaust steam supply and extraction steam flow rate of the intermediate pressure cylinder based on a preset change, and monitoring the electrical load of the turbine unit during the adjustment process to determine the change in the electrical load of the turbine unit, and using the change in the electrical load of the turbine unit as the degree of influence information.

[0035] S103: Determine the advance control margin of the turbine unit's electrical load based on the information of the first exhaust steam extraction flow rate and its impact.

[0036] Among them, the power load advance control margin of the steam turbine unit refers to the degree of matching between the steam turbine unit's ability to adjust its output power and the actual required power when responding to changes in grid load. In other words, the power load advance control margin of the steam turbine unit can be determined when the steam turbine unit is detected to be operating under zero operating conditions. Thus, when the steam turbine unit is controlled based on the power load advance control margin, the power load response rate of the steam turbine unit can be effectively improved.

[0037] In this embodiment of the present disclosure, after determining the degree of influence of the exhaust steam supply and extraction steam flow rate of the intermediate pressure cylinder on the electrical load of the turbine unit, the electrical load advance control margin of the turbine unit can be determined based on the first exhaust steam supply and extraction steam flow rate and the degree of influence information.

[0038] In some embodiments, a reference electrical load advance control margin corresponding to the exhaust steam heating extraction flow rate and impact information may be obtained in advance, and after determining the first exhaust steam heating extraction flow rate and impact information, the reference electrical load advance control margin corresponding to the first exhaust steam heating extraction flow rate and impact information may be determined as the electrical load advance control margin of the turbine unit, without limitation.

[0039] S104: Control the operation of the steam turbine unit based on the initial operating parameters and the electrical load advance control margin.

[0040] In this embodiment of the present disclosure, after determining the electrical load advance control margin of the turbine unit based on the first exhaust steam heating extraction steam flow rate and influence information, the turbine unit can be controlled to operate according to the initial operating parameters and the electrical load advance control margin.

[0041] In some embodiments, the turbine unit is controlled to operate based on the initial operating parameters and the electrical load advance control margin. This can be achieved by adjusting the initial operating parameters based on the electrical load advance control margin and then controlling the turbine unit based on the adjusted initial operating parameters. Alternatively, it can be achieved by generating a control command based on the initial operating parameters and the electrical load advance control margin, and then controlling the turbine unit based on the control command. There are no restrictions on this.

[0042] In this embodiment of the disclosure, in response to the detection that the turbine unit is in a zero-output heating condition and receiving an electrical load adjustment command, the initial operating parameters of the boiler when the turbine unit is in a pure condensing condition and the first exhaust steam extraction flow rate of the intermediate pressure cylinder when the turbine unit is in a zero-output heating condition are obtained. The influence information of the exhaust steam extraction flow rate of the intermediate pressure cylinder on the electrical load of the turbine unit is determined, wherein the influence information indicates the degree of influence of the exhaust steam extraction flow rate on the electrical load. Then, based on the first exhaust steam extraction flow rate and the influence information, the electrical load advance control margin of the turbine unit is determined. Based on the initial operating parameters and the electrical load advance control margin, the turbine unit is controlled to operate. Thus, the electrical load response rate of the turbine unit can be ensured while controlling the turbine unit to operate stably in a zero-output condition.

[0043] Figure 2 This is a flowchart illustrating the operation control method for a steam turbine unit proposed in another embodiment of this disclosure.

[0044] like Figure 2 As shown, the operation control method of this steam turbine unit includes:

[0045] S201: In response to the detection that the turbine unit is in zero-output heating condition and the receipt of the electrical load adjustment command, the initial operating parameters of the boiler when the turbine unit is in pure condensing condition, and the first exhaust steam extraction flow rate of the intermediate pressure cylinder when the turbine unit is in zero-output heating condition.

[0046] For a detailed description of S201, please refer to the above embodiments, which will not be repeated here.

[0047] S202: When the turbine unit is in zero-output heating operation, obtain the first electrical load of the turbine unit and the first exhaust steam extraction flow rate of the intermediate pressure cylinder when the turbine unit is running based on different steam flow rates.

[0048] Among them, when the steam turbine unit is in the zero-output heating condition, the electrical load of the steam turbine unit can be called the first electrical load when the steam turbine unit is running based on different steam flow rates, and the exhaust steam extraction flow rate of the intermediate pressure cylinder of the steam turbine unit can be called the first exhaust steam extraction flow rate.

[0049] In other words, in this embodiment of the present disclosure, the acquisition of steam flow rates (M) can be performed when the turbine unit is detected to be in a zero-output heating condition. msn During operation, the first electrical load of the steam turbine unit (W″) n ) and the first exhaust steam supply and extraction steam flow rate of the intermediate pressure cylinder (M″) hsn ).

[0050] S202: When the turbine unit is in a non-zero output heating condition, obtain the second electrical load of the turbine unit and the second exhaust steam extraction flow rate of the intermediate pressure cylinder when the turbine unit is running based on different steam flow rates.

[0051] Among them, when the steam turbine unit is in a non-zero output heating condition, the electrical load of the steam turbine unit can be called the second electrical load when the steam turbine unit is running based on different steam flow rates, and the exhaust steam extraction flow rate of the intermediate pressure cylinder of the steam turbine unit can be called the second exhaust steam extraction flow rate.

[0052] In other words, in this embodiment of the present disclosure, the acquisition of steam flow rates (M) can be performed when the turbine unit is detected to be in a zero-output heating condition. msn During operation, the second electrical load of the steam turbine unit (W′) n ) and the second exhaust steam extraction flow rate of the intermediate pressure cylinder for heating (M′) hsn ).

[0053] S204: Determine the degree of influence information based on steam flow rate, first electrical load, first exhaust steam for heating extraction flow rate, second electrical load, and second exhaust steam for heating extraction flow rate.

[0054] In this embodiment of the disclosure, after determining the steam flow rate, the first electrical load, the first exhaust steam supply and extraction steam flow rate, the second electrical load, and the second exhaust steam supply and extraction steam flow rate, the degree of influence information can be determined based on the steam flow rate, the first electrical load, the first exhaust steam supply and extraction steam flow rate, the second electrical load, and the second exhaust steam supply and extraction steam flow rate.

[0055] In some embodiments, a pre-trained neural network model can be used to determine the degree of influence based on the steam flow rate, the first electrical load, the first exhaust steam heating extraction flow rate, the second electrical load, and the second exhaust steam heating extraction flow rate. That is, the steam flow rate, the first electrical load, the first exhaust steam heating extraction flow rate, the second electrical load, and the second exhaust steam heating extraction flow rate can all be input into the pre-trained neural network model, and the neural network model can process the steam flow rate, the first electrical load, the first exhaust steam heating extraction flow rate, the second electrical load, and the second exhaust steam heating extraction flow rate and output the corresponding degree of influence information. There are no restrictions on this.

[0056] In other embodiments, a functional relationship curve between the steam flow rate and the first electrical load can be obtained by fitting: W″=a(M″) LPi Then, by fitting, the functional relationship curve between the steam flow rate and the first exhaust steam extraction flow rate for heating is obtained: M′ hs =b(M″ ms Then, by fitting the curve, the functional relationship between steam flow rate and second electrical load is obtained: W′=c(M′ LPi Then, by fitting, the functional relationship curve between the steam flow rate and the second exhaust steam extraction flow rate for heating is obtained: M′ hs =f(M′) ms Then, the aforementioned multiple functional relationship curves can be analyzed to determine the degree of influence, without any restrictions.

[0057] Optionally, in some embodiments, the degree of influence information is determined based on the steam flow rate, the first electrical load, the first exhaust steam for heating extraction flow rate, the second electrical load, and the second exhaust steam for heating extraction flow rate. This can be achieved by determining the difference in electrical load between the first and second electrical loads when the steam flow rates are the same, and by determining the difference in exhaust steam for heating extraction flow rates between the first and second exhaust steam for heating extraction flow rates when the steam flow rates are the same. The ratio between the difference in electrical load and the difference in exhaust steam for heating extraction flow rates is then used as the degree of influence information.

[0058] In other words, in this embodiment of the present disclosure, the difference between the first electrical load and the second electrical load under the condition of the same steam flow rate can be determined, and the difference between the first exhaust steam supply and extraction steam flow rate and the second exhaust steam supply and extraction steam flow rate under the condition of the same steam flow rate can be determined. Then, the ratio between the difference in electrical load and the difference in exhaust steam supply and extraction steam flow rate can be used as the degree of influence information. The method for determining the degree of influence information A is as follows:

[0059]

[0060] S205: Determine the advance control margin of the turbine unit's electrical load based on the information of the first exhaust steam extraction flow rate and its impact.

[0061] Optionally, in some embodiments, the electrical load advance control margin of the turbine unit is determined based on the first exhaust steam heating extraction flow rate and the degree of influence information. This can be achieved by determining the average of multiple ratios and using the product of the average value and the first exhaust steam heating extraction flow rate as the electrical load advance control margin.

[0062] In other words, in this embodiment of the present disclosure, the electrical load advance control margin of the turbine unit can be determined based on the first exhaust steam heating extraction steam flow rate and its degree of influence. Alternatively, the average of multiple ratios can be determined, and the product of the average value and the first exhaust steam heating extraction steam flow rate can be used as the electrical load advance control margin ΔW. The method for determining the electrical load advance control margin ΔW is as follows:

[0063]

[0064] Where n is the number of ratios, M″ hs The steam extraction flow rate for heating the first row of steam.

[0065] S206: Determine the initial electrical load of the turbine unit when it is in pure condensing operation and operating based on the initial operating parameters.

[0066] Among them, when the steam turbine unit is in pure condensing condition and is operating based on the initial operating parameters, the determined electrical load of the steam turbine unit is the initial electrical load.

[0067] In other words, in this embodiment of the present disclosure, the initial electrical load W of the turbine unit can be determined when the turbine unit is in pure condensing condition and operating based on the initial operating parameters. Then, the initial electrical load W of the turbine unit can be used to trigger the execution of the subsequent turbine unit operation control method. For details, please refer to the following embodiments.

[0068] S207: Determine the first conversion function between the initial electrical load and the initial boiler coal feed, and determine the second conversion function between the initial electrical load and the initial boiler primary air volume.

[0069] In this embodiment of the disclosure, the initial operating parameters include: initial boiler coal feed rate and initial boiler primary air volume.

[0070] The first conversion function can be used to describe the relationship between the initial electrical load and the initial boiler coal feed, and correspondingly, the second conversion function can be used to describe the relationship between the initial electrical load and the initial boiler primary air volume, without any restrictions.

[0071] In other words, in this embodiment of the present disclosure, a first conversion function G = f(W) between the initial electrical load and the initial boiler coal feed can be determined, and a second conversion function F = h(W) between the initial electrical load and the initial boiler primary air volume can be determined. Then, the first conversion function and the second conversion function can be combined to trigger the execution of the subsequent turbine unit operation control method. For details, please refer to the following embodiments, which will not be repeated here.

[0072] S208: The first conversion function is modified based on the electrical load advance control margin to obtain the third conversion function, and the second conversion function is modified based on the electrical load advance control margin to obtain the fourth conversion function.

[0073] In this embodiment of the present disclosure, after determining a first conversion function between the initial electrical load and the initial boiler coal feed, and a second conversion function between the initial electrical load and the initial boiler primary air volume, the first conversion function can be modified based on the electrical load advance control margin to obtain a third conversion function, and the second conversion function can be modified based on the electrical load advance control margin to obtain a fourth conversion function.

[0074] The third transformation function is expressed as: G = f(W + ΔW), and the fourth transformation function is expressed as: F = h(W + ΔW).

[0075] S209: Solve the third transformation function to obtain the target boiler coal feed rate, and solve the fourth transformation function to obtain the target boiler primary air volume.

[0076] In this embodiment of the present disclosure, after modifying the first conversion function based on the electrical load advance control margin to obtain the third conversion function, and modifying the second conversion function based on the electrical load advance control margin to obtain the fourth conversion function, the third conversion function can be solved to obtain the target boiler coal feed rate, and the fourth conversion function can be solved to obtain the target boiler primary air volume.

[0077] S210: Control the operation of the steam turbine unit based on the target boiler coal feed rate and the target boiler primary air volume.

[0078] In this embodiment of the invention, after determining the target boiler coal feed rate and the target boiler primary air volume, the turbine unit can be controlled to operate based on the target boiler coal feed rate and the target boiler primary air volume. That is, the boiler coal feed rate and the boiler primary air volume can be adjusted based on the target boiler coal feed rate and the target boiler primary air volume to control the turbine unit operation. Alternatively, corresponding operation control commands can be generated based on the target boiler coal feed rate and the target boiler primary air volume, and the turbine unit operation can be controlled based on the operation control commands. There are no limitations on this.

[0079] In this embodiment of the disclosure, the turbine unit further includes a proportional-integral-derivative controller.

[0080] Optionally, in some embodiments, controlling the operation of the steam turbine unit based on the target boiler coal feed rate and the target boiler primary air volume can be achieved by generating target control commands based on the target boiler coal feed rate and the target boiler primary air volume, and controlling the operation of the boiler and the proportional-integral-derivative controller based on the target control commands.

[0081] In other words, in this embodiment of the present disclosure, a corresponding control command may be generated jointly based on the target boiler coal feed rate and the target boiler primary air volume. This control command is the target control command. Then, the target control command can be provided to the boiler and the proportional-integral-derivative controller so that the boiler and the proportional-integral-derivative controller can operate based on the target control command. Thus, the turbine unit operation control method described in this embodiment of the present disclosure is realized.

[0082] In this embodiment of the disclosure, in response to the detection that the turbine unit is in a zero-output heating condition and receiving an electrical load adjustment command, the initial operating parameters of the boiler when the turbine unit is in a pure condensing condition and the first exhaust steam extraction flow rate of the intermediate pressure cylinder when the turbine unit is in a zero-output heating condition are obtained. Then, when the turbine unit is in a zero-output heating condition, the first electrical load of the turbine unit and the first exhaust steam extraction flow rate of the intermediate pressure cylinder are obtained when the turbine unit operates based on different steam flow rates. When the turbine unit is in a non-zero-output heating condition, the second electrical load of the turbine unit and the second exhaust steam extraction flow rate of the intermediate pressure cylinder are obtained when the turbine unit operates based on different steam flow rates. Then, based on the steam flow rate, the first electrical load, the first exhaust steam extraction flow rate, the second electrical load, and the second exhaust steam extraction flow rate, the degree of influence information is determined. Finally, based on the first exhaust steam extraction flow rate and the degree of influence information, the following is determined: The turbine unit's electrical load advance control margin is used to determine the initial electrical load of the turbine unit under pure condensing operation and based on the initial operating parameters. A first conversion function is then determined between the initial electrical load and the initial boiler coal feed rate, and a second conversion function is determined between the initial electrical load and the initial boiler primary air volume. The first conversion function is then corrected based on the electrical load advance control margin to obtain a third conversion function, and the second conversion function is also corrected based on the electrical load advance control margin to obtain a fourth conversion function. The third conversion function is solved to obtain the target boiler coal feed rate, and the fourth conversion function is solved to obtain the target boiler primary air volume. Based on the target boiler coal feed rate and the target boiler primary air volume, the turbine unit's operation is controlled. This ensures the turbine unit's electrical load response rate while maintaining stable operation under zero-output conditions.

[0083] Figure 3This is a schematic diagram of the operation control device for a steam turbine unit according to an embodiment of this disclosure.

[0084] like Figure 3 As shown, the turbine unit's operation control device 30 is applied to the turbine unit, which includes an intermediate-pressure cylinder and a boiler. The turbine unit's operation control device 30 includes:

[0085] The acquisition module 301 is used to acquire the initial operating parameters of the boiler when the turbine unit is in pure condensing mode and the first exhaust steam extraction flow rate of the intermediate pressure cylinder when the turbine unit is in zero-output heating mode in response to the detection that the turbine unit is in zero-output heating mode and the electrical load adjustment command.

[0086] The first determining module 302 is used to determine the degree of influence of the exhaust steam supply and heating extraction steam flow rate of the intermediate pressure cylinder on the electrical load of the turbine unit, wherein the degree of influence information represents the degree of influence of the exhaust steam supply and heating extraction steam flow rate on the electrical load.

[0087] The second determining module 303 is used to determine the electrical load advance control margin of the steam turbine unit based on the first exhaust steam heating extraction steam flow rate and impact information.

[0088] The control module 304 is used to control the operation of the steam turbine unit based on the initial operating parameters and the electrical load advance control margin.

[0089] In some embodiments of this disclosure, the first determining module 302 is further configured to:

[0090] Under the condition of zero-output heating of the steam turbine unit, the first electrical load of the steam turbine unit and the first exhaust steam extraction flow of the intermediate pressure cylinder are obtained when the steam turbine unit is running based on different steam flow rates.

[0091] When the turbine unit is in a non-zero output heating condition, the second electrical load of the turbine unit and the second exhaust steam extraction flow of the intermediate pressure cylinder are obtained when the turbine unit is running based on different steam flow rates.

[0092] Based on the steam flow rate, the first electrical load, the first exhaust steam supply and extraction steam flow rate, the second electrical load, and the second exhaust steam supply and extraction steam flow rate, the degree of influence is determined.

[0093] In some embodiments of this disclosure, the first determining module 302 is further configured to:

[0094] Determine the difference in electrical load between the first electrical load and the second electrical load when the steam flow rate is the same;

[0095] Determine the difference in exhaust steam supply and extraction steam flow rate between the first exhaust steam supply and extraction steam flow rate and the second exhaust steam supply and extraction steam flow rate, assuming the same steam flow rate.

[0096] The ratio between the difference in electrical load and the difference in exhaust steam supply and extraction steam flow is used as information on the degree of influence.

[0097] In some embodiments of this disclosure, the second determining module 303 is further configured to:

[0098] Determine the average of multiple ratios;

[0099] The product of the average value and the first exhaust steam extraction flow rate is used as the electrical load advance control margin.

[0100] In some embodiments of this disclosure, the initial operating parameters include: initial boiler coal feed rate and initial boiler primary air volume;

[0101] The control module 304 is also used for:

[0102] Determine the initial electrical load of the turbine unit when it is in pure condensing operation and operating based on the initial operating parameters;

[0103] Determine the first conversion function between the initial electrical load and the initial boiler coal feed, and determine the second conversion function between the initial electrical load and the initial boiler primary air volume;

[0104] The first conversion function is modified based on the electrical load advance control margin to obtain the third conversion function, and the second conversion function is modified based on the electrical load advance control margin to obtain the fourth conversion function.

[0105] The third transformation function is solved to obtain the target boiler coal feed rate, and the fourth transformation function is solved to obtain the target boiler primary air volume.

[0106] The operation of the steam turbine unit is controlled based on the target boiler coal feed rate and the target boiler primary air volume.

[0107] In some embodiments of this disclosure, the turbine unit further includes: a proportional-integral-derivative controller;

[0108] The control module 304 is also used for:

[0109] Based on the target boiler coal feed rate and target boiler primary air volume, generate target control commands;

[0110] Based on the target control command, the boiler and the proportional-integral-derivative controller are controlled to operate.

[0111] With the above Figures 1 to 2 Corresponding to the turbine operation control method provided in the embodiments, this disclosure also provides a turbine operation control device. Since the turbine operation control device provided in the embodiments of this disclosure is similar to the one described above... Figures 1 to 2The turbine operation control method provided in the embodiments corresponds to the turbine operation control method provided in this disclosure. Therefore, the implementation method of the turbine operation control method is also applicable to the turbine operation control device provided in the embodiments of this disclosure, and will not be described in detail in the embodiments of this disclosure.

[0112] In this embodiment, in response to the detection that the turbine unit is in a zero-output heating condition and receiving an electrical load adjustment command, the initial operating parameters of the boiler when the turbine unit is in a pure condensing condition and the first exhaust steam extraction flow rate of the intermediate pressure cylinder when the turbine unit is in a zero-output heating condition are obtained. The influence information of the exhaust steam extraction flow rate of the intermediate pressure cylinder on the electrical load of the turbine unit is determined. The influence information indicates the degree of influence of the exhaust steam extraction flow rate on the electrical load. Based on the first exhaust steam extraction flow rate and the influence information, the electrical load advance control margin of the turbine unit is determined. Based on the initial operating parameters and the electrical load advance control margin, the turbine unit is controlled to operate. Thus, the electrical load response rate of the turbine unit can be ensured while controlling the turbine unit to operate stably in a zero-output condition.

[0113] To implement the above embodiments, this disclosure also proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the turbine unit operation control method proposed in the foregoing embodiments of this disclosure.

[0114] To implement the above embodiments, this disclosure also proposes a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the turbine unit operation control method proposed in the foregoing embodiments of this disclosure.

[0115] To implement the above embodiments, this disclosure also proposes a computer program product that, when executed by an instruction processor, performs the turbine unit operation control method as proposed in the foregoing embodiments of this disclosure.

[0116] Figure 4 A block diagram of an exemplary electronic device suitable for implementing embodiments of the present disclosure is shown. Figure 4 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments disclosed herein.

[0117] like Figure 4 As shown, the electronic device is represented in the form of a general-purpose computing device. The components of the electronic device may include, but are not limited to: one or more processors or processing units 16, system memory 28, and bus 18 connecting different system components (including system memory 28 and processing unit 16).

[0118] Bus 18 represents one or more of several bus architectures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. Examples of these architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnect (PCI) bus.

[0119] Electronic devices typically include a variety of computer-readable media. These media can be any available media that can be accessed by the electronic device, including volatile and non-volatile media, and removable and non-removable media.

[0120] Memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The electronic device may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 34 may be used to read and write non-removable, non-volatile magnetic media (…). Figure 4 Not shown; usually referred to as a "hard drive".

[0121] although Figure 4 Not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk") and an optical disc drive for reading and writing to a removable non-volatile optical disc (e.g., a compact disc read-only memory (CD-ROM), a digital video disc read-only memory (DVD-ROM), or other optical media) may be provided. In these cases, each drive may be connected to bus 18 via one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of this disclosure.

[0122] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 42 typically perform the functions and / or methods described in the embodiments of this disclosure.

[0123] The electronic device can also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), and with one or more devices that enable a user to interact with the electronic device, and / or with any device that enables the electronic device to communicate with one or more other computing devices (e.g., network card, modem, etc.). This communication can be performed via input / output (I / O) interface 22. Furthermore, the electronic device can also communicate with one or more networks (e.g., Local Area Network (LAN), Wide Area Network (WAN), and / or public networks, such as the Internet) via network adapter 20. As shown, network adapter 20 communicates with other modules of the electronic device via bus 18. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the electronic device, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0124] The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, such as implementing the turbine unit operation control method mentioned in the foregoing embodiments.

[0125] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0126] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

[0127] It should be noted that in the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0128] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0129] It should be understood that various parts of this disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0130] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0131] Furthermore, the functional units in the various embodiments of this disclosure can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0132] The storage media mentioned above can be read-only memory, disk, or optical disk, etc.

[0133] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0134] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A method for operating and controlling a steam turbine unit, characterized in that, Applied to a steam turbine unit, the steam turbine unit comprising: an intermediate-pressure cylinder and a boiler, the method comprising: In response to the detection that the turbine unit is in a zero-output heating condition and receiving an electrical load adjustment command, the initial operating parameters of the boiler when the turbine unit is in a pure condensing condition and the first exhaust steam extraction flow rate of the intermediate pressure cylinder when the turbine unit is in the zero-output heating condition are obtained. The influence information of the exhaust steam supply and extraction steam flow rate of the intermediate pressure cylinder on the electrical load of the turbine unit is determined, wherein the influence information indicates the degree of influence of the exhaust steam supply and extraction steam flow rate on the electrical load. Based on the first exhaust steam extraction flow rate for heating and the information on the degree of influence, the electrical load advance control margin of the turbine unit is determined; The turbine unit is controlled to operate based on the initial operating parameters and the electrical load advance control margin. The information regarding the impact of the exhaust steam flow rate of the intermediate-pressure cylinder on the electrical load of the turbine unit includes: When the turbine unit is in the zero-output heating condition, the first electrical load of the turbine unit and the first exhaust steam extraction flow rate of the intermediate pressure cylinder are obtained when the turbine unit is running based on different steam flow rates. When the turbine unit is in a non-zero output heating condition, the second electrical load of the turbine unit and the second exhaust steam extraction flow rate of the intermediate pressure cylinder are obtained when the turbine unit is running based on different steam flow rates. Based on the steam flow rate, the first electrical load, the first exhaust steam for heating extraction flow rate, the second electrical load, and the second exhaust steam for heating extraction flow rate, determine the degree of influence information; The determination of the degree of influence information based on the steam flow rate, the first electrical load, the first exhaust steam extraction flow rate for heating, the second electrical load, and the second exhaust steam extraction flow rate for heating includes: Determine the difference in electrical load between the second electrical load and the second electrical load when the steam flow rate is the same; Determine the difference in exhaust steam supply and extraction steam flow rates between the first exhaust steam supply and extraction steam flow rate and the second exhaust steam supply and extraction steam flow rate when the steam flow rates are the same. The ratio between the difference in electrical load and the difference in exhaust steam supply and extraction steam flow rate is used as the influence level information; The step of determining the electrical load advance control margin of the turbine unit based on the first exhaust steam heating extraction flow rate and the influence degree information includes: Determine the average of the multiple ratios; The product of the average value and the first exhaust steam extraction flow rate is taken as the electrical load advance control margin. The initial operating parameters include: initial boiler coal feed rate and initial boiler primary air volume; The step of controlling the operation of the steam turbine unit based on the initial operating parameters and the electrical load advance control margin includes: When the turbine unit is in the pure condensing condition and is operating based on the initial operating parameters, determine the initial electrical load of the turbine unit; Determine a first conversion function between the initial electrical load and the initial boiler coal feed rate, and determine a second conversion function between the initial electrical load and the initial boiler primary air volume; The first conversion function is modified based on the electrical load advance control margin to obtain the third conversion function, and the second conversion function is modified based on the electrical load advance control margin to obtain the fourth conversion function. The third transformation function is solved to obtain the target boiler coal feed rate, and the fourth transformation function is solved to obtain the target boiler primary air volume; The operation of the steam turbine unit is controlled based on the target boiler coal feed rate and the target boiler primary air volume.

2. The method as described in claim 1, characterized in that, The turbine unit also includes: a proportional-integral-derivative controller; The step of controlling the operation of the steam turbine unit based on the target boiler coal feed rate and the target boiler primary air volume includes: Based on the target boiler coal feed rate and the target boiler primary air volume, a target control command is generated; Based on the target control command, the boiler and the proportional-integral-derivative controller are controlled to operate.

3. An operation control device for a steam turbine unit, characterized in that, Applied to a steam turbine unit, the steam turbine unit including: an intermediate-pressure cylinder and a boiler, the device including: The acquisition module is used to acquire the initial operating parameters of the boiler when the turbine unit is in pure condensing mode and the first exhaust steam extraction flow rate of the intermediate pressure cylinder when the turbine unit is in the zero-output heating mode in response to the detection that the turbine unit is in the zero-output heating mode and the electrical load adjustment command. The first determining module is used to determine the degree of influence of the exhaust steam supply and heating extraction flow rate of the intermediate-pressure cylinder on the electrical load of the turbine unit, wherein the degree of influence information represents the degree of influence of the exhaust steam supply and heating extraction flow rate on the electrical load; determining the degree of influence of the exhaust steam supply and heating extraction flow rate of the intermediate-pressure cylinder on the electrical load of the turbine unit includes: When the turbine unit is in the zero-output heating condition, the first electrical load of the turbine unit and the first exhaust steam extraction flow rate of the intermediate pressure cylinder are obtained when the turbine unit is running based on different steam flow rates. When the turbine unit is in a non-zero output heating condition, the second electrical load of the turbine unit and the second exhaust steam extraction flow rate of the intermediate pressure cylinder are obtained when the turbine unit is running based on different steam flow rates. Based on the steam flow rate, the first electrical load, the first exhaust steam for heating extraction flow rate, the second electrical load, and the second exhaust steam for heating extraction flow rate, determine the degree of influence information; The determination of the degree of influence information based on the steam flow rate, the first electrical load, the first exhaust steam extraction flow rate for heating, the second electrical load, and the second exhaust steam extraction flow rate for heating includes: Determine the difference in electrical load between the second electrical load and the second electrical load when the steam flow rate is the same; Determine the difference in exhaust steam supply and extraction steam flow rates between the first exhaust steam supply and extraction steam flow rate and the second exhaust steam supply and extraction steam flow rate when the steam flow rates are the same. The ratio between the difference in electrical load and the difference in exhaust steam supply and extraction steam flow rate is used as the influence level information; The second determining module is used to determine the electrical load advance control margin of the steam turbine unit based on the first exhaust steam heating extraction flow rate and the influence degree information; The second determining module is specifically used for: Determine the average of the multiple ratios; The product of the average value and the first exhaust steam extraction flow rate is taken as the electrical load advance control margin. A control module is used to control the operation of the steam turbine unit according to the initial operating parameters and the electrical load advance control margin; the initial operating parameters include: initial boiler coal feed rate and initial boiler primary air volume; wherein, controlling the operation of the steam turbine unit according to the initial operating parameters and the electrical load advance control margin includes: determining the initial electrical load of the steam turbine unit when the steam turbine unit is in the pure condensing condition and operating based on the initial operating parameters; determining a first conversion function between the initial electrical load and the initial boiler coal feed rate, and determining a second conversion function between the initial electrical load and the initial boiler primary air volume; correcting the first conversion function based on the electrical load advance control margin to obtain a third conversion function, and correcting the second conversion function based on the electrical load advance control margin to obtain a fourth conversion function; solving the third conversion function to obtain a target boiler coal feed rate, and solving the fourth conversion function to obtain a target boiler primary air volume; and controlling the operation of the steam turbine unit according to the target boiler coal feed rate and the target boiler primary air volume.

4. An electronic device, comprising: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-2.

5. A non-transitory computer-readable storage medium storing computer instructions, wherein, The computer instructions are used to cause the computer to perform the method according to any one of claims 1-2.

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