Adaptive multi-mode control method and one-turbine two-machine thermal power system

Abstract

This disclosure relates to the field of thermal power generation technology, and discloses an adaptive adjustment mode for a single-boiler, two-unit thermal power system and an adaptive multi-mode control method. The system comprises a coal-fired boiler whose superheater module outlet is connected to a first high-pressure steam inlet and a second high-pressure steam inlet via a main steam diversion valve; the first and second high-pressure steam outlets are connected to the inlet of the reheat module in the coal-fired boiler via a cold reheat steam merging valve; the reheat module outlet is connected to a first medium-pressure steam inlet and a second medium-pressure steam inlet via a hot reheat steam diversion valve; and a control module is connected to the main steam diversion valve, the cold reheat steam merging valve, and the hot reheat steam diversion valve, respectively. The control module is used to automatically control the valve openings of the main steam diversion valve, the cold reheat steam merging valve, and the hot reheat steam diversion valve to automatically adjust the operating mode of the single-boiler, two-unit thermal power system, thereby enhancing the scheduling flexibility of the entire thermal power system.

Description

Technical Field

[0001] This disclosure relates to the field of thermal power generation technology, specifically to a thermal power system with one boiler and two generators that adaptively adjusts its operating mode and an adaptive multi-mode control method. Background Technology

[0002] Traditional thermal power generation systems typically employ a fixed configuration of one boiler and one generator. Under conditions of deep grid peak shaving and frequent load fluctuations, these units often need to operate at low or variable loads for extended periods, leading to problems such as difficulty in maintaining steam parameters, significant throttling losses, and low thermal efficiency. While some existing one-boiler-two-generator thermal power systems utilize a single boiler and two generator configuration, their steam pipelines are often rigidly connected. The distribution and merging of main steam and reheat steam lack flexible and adjustable control methods, failing to adaptively match steam flow and pressure based on real-time boiler operating parameters, total system load, and the actual operating status of each generator unit. This easily results in incoordination between the two units' operating conditions, deviations of reheat steam parameters from design values, and decreased economy and stability during low-load periods. Furthermore, traditional systems rely on manual or fixed logic for load allocation, making it difficult to achieve coordinated and optimized operation between the steam system and generator units. This increases equipment losses during deep peak shaving and restricts the scheduling flexibility and energy utilization efficiency of the entire thermal power system under complex grid load demands. Summary of the Invention

[0003] This disclosure addresses the problems existing in the prior art by providing an adaptive adjustment operating mode for a single-boiler, two-unit thermal power system and an adaptive multi-mode control method.

[0004] To achieve the above objectives, the technical solution adopted in this disclosure is as follows: The first aspect of this disclosure discloses a coal-fired power system with one boiler and two generators that adaptively adjusts its operating mode, comprising: a first steam turbine generator set, a second steam turbine generator set, a first feedwater reheat module, a second feedwater reheat module, a coal-fired boiler, and a control module; the outlet of the superheating module of the coal-fired boiler is connected to the first high-pressure steam inlet of the first steam turbine generator set and the second high-pressure steam inlet of the second steam turbine generator set via a main steam diversion valve; the first high-pressure steam outlet of the first steam turbine generator set and the second high-pressure steam outlet of the second steam turbine generator set are connected to the inlet of the reheat module in the coal-fired boiler via a cold reheat steam confluence valve; the outlet of the reheat module is connected to the first medium-pressure steam inlet of the first steam turbine generator set and the second medium-pressure steam inlet of the second steam turbine generator set via a hot reheat steam diversion valve. The first steam turbine generator set is connected to the coal-fired boiler through the first feedwater regeneration module, and the second steam turbine generator set is connected to the coal-fired boiler through the second feedwater regeneration module. The control module is connected to the main steam diversion valve, the cold reheat steam merging valve, and the hot reheat steam diversion valve, respectively. The control module is used to automatically control the valve opening of the main steam diversion valve, the cold reheat steam merging valve, and the hot reheat steam diversion valve based on the main steam standard parameters and reheat steam standard parameters of the coal-fired boiler, the total system load of the one-boiler-two-generator thermal power system monitored in real time, the real-time main steam parameters and real-time reheat steam parameters of the system, the first real-time operating information of the first steam turbine generator set, and the second real-time operating information of the second steam turbine generator set, so as to realize the automatic adjustment of the operating mode of the one-boiler-two-generator thermal power system.

[0005] In some embodiments of this disclosure, the coal-fired boiler includes: an air preheater, a screen-type superheater, a water-cooled wall, an economizer, a high-temperature superheater, a low-temperature superheater, a high-temperature reheater, and a low-temperature reheater; the air preheater is located at the very end of the tail flue of the coal-fired boiler; the screen-type superheater is located in the upper part of the furnace of the coal-fired boiler; the economizer, the water-cooled wall, the low-temperature superheater, and the high-temperature superheater are sequentially connected to form the superheating module of the coal-fired boiler, the inlet of the economizer is the inlet of the superheating module, and the outlet of the high-temperature superheater is the outlet of the superheating module; the low-temperature reheater is connected to the high-temperature reheater to form the reheating module of the coal-fired boiler, the inlet of the low-temperature reheater is the inlet of the reheating module, and the outlet of the high-temperature reheater is the outlet of the reheating module.

[0006] In some embodiments of this disclosure, the inlet of the economizer of the coal-fired boiler is connected to the outlet of the first feedwater regeneration module and the outlet of the second feedwater regeneration module respectively through a feedwater confluence valve. The feedwater confluence valve is used to collect the condensate from the first feedwater regeneration module and the condensate from the second feedwater regeneration module into the economizer, so that the steam supplied by the coal-fired boiler to the first steam turbine generator set and the second steam turbine generator set is converted into condensate and re-enters the economizer in the coal-fired boiler.

[0007] In some embodiments of this disclosure, the control module is also connected to the feedwater confluence valve and is used to automatically control the valve opening of the feedwater confluence valve based on the main steam standard parameters, reheat steam standard parameters of the coal-fired boiler, the total system load of the one-boiler-two-generator thermal power system monitored in real time, the real-time main steam parameters, the real-time reheat steam parameters, the first real-time operating information of the first turbine generator set, and the second real-time operating information of the second turbine generator set.

[0008] A second aspect of this disclosure discloses an adaptive multi-mode control method applicable to a control module in a coal-fired power plant system with one boiler and two turbines that adaptively adjusts its operating mode. The method includes: a control module suitable for the coal-fired power plant system, comprising: acquiring the main steam standard parameters and reheat steam standard parameters of the coal-fired boiler; real-time monitoring of the total system load, real-time main steam parameters, real-time reheat steam parameters, first real-time operating information of the first turbine generator set, and second real-time operating information of the second turbine generator set of the coal-fired power plant system; determining a first health score of the first turbine generator set and a second health score of the second turbine generator set in the coal-fired power plant system based on the main steam standard parameters, the reheat steam standard parameters, the real-time main steam parameters, the real-time reheat steam parameters, the first real-time operating information, and the second real-time operating information; and determining a first health score of the first turbine generator set and a second health score of the second turbine generator set based on the first health score, the second health score, and a preset minimum load. The minimum threshold for high-energy conversion load of the one-boiler-two-unit thermal power system is determined by the load ratio coefficient, preset health status correction coefficient, preset two-unit health status difference correction coefficient, preset low-load condition correction coefficient, total system load, and rated system load. Based on the minimum threshold for high-energy conversion load and the total system load, a target operating mode matching the total system load is selected from preset operating modes, including dual-unit parallel operation mode, load reconfiguration switching mode, and single-unit operation mode. Based on the target operating mode, the first health score, and the second health score, the valve openings corresponding to the main steam diversion valve, cold reheat steam merging valve, hot reheat steam diversion valve, and feedwater merging valve are determined. The valve openings of the corresponding valves are controlled based on the valve openings of the main steam diversion valve, cold reheat steam merging valve, hot reheat steam merging valve, and feedwater merging valve, so that the one-boiler-two-unit thermal power system operates in the target operating mode.

[0009] In some embodiments of this disclosure, determining the minimum high-energy conversion load threshold of the one-boiler-two-generator thermal power system based on the first health score, the second health score, a preset basic minimum load ratio coefficient, a preset health status correction coefficient, a preset two-unit health status difference correction coefficient, a preset low-load condition correction coefficient, the total system load, and the system rated load includes: calculating the first high-energy conversion load minimum threshold of the first steam turbine generator set using a first preset formula; calculating the first high-energy conversion load minimum threshold of the second steam turbine generator set using a second preset formula; and calculating the first high-energy conversion load minimum threshold of the second steam turbine generator set using a second preset formula; and using the sum of the first high-energy conversion load minimum threshold and the second high-energy conversion load minimum threshold as the minimum high-energy conversion load threshold of the one-boiler-two-generator thermal power system.

[0010] In some embodiments of this disclosure, the calculation of the first health score, the second health score, the preset basic minimum load ratio coefficient, the preset health status correction coefficient, the preset two-machine health status difference correction coefficient, the preset low load condition correction coefficient, the total system load, and the system rated load using a first preset formula yields the first high-energy conversion load minimum threshold for the first steam turbine generator set, expressed as: , The second preset formula is used to calculate the first health score, the second health score, the preset basic minimum load ratio coefficient, the preset health status correction coefficient, the preset two-machine health status difference correction coefficient, the preset low load condition correction coefficient, the total system load, and the system rated load to obtain the second high-energy conversion load minimum threshold of the second steam turbine generator set, expressed as: , in, This is the minimum threshold for the first high-energy conversion load; This is the minimum threshold for the first high-energy conversion load; The preset minimum load ratio coefficient; Preset health status correction coefficient; To preset the correction coefficient for the difference in health status between the two machines; This is a preset correction factor for low-load operating conditions; This is the system's rated load. This represents the total system load. .

[0011] In some embodiments of this disclosure, determining the first health score of the first turbine generator set and the second health score of the second turbine generator set in the one-boiler-two-unit thermal power system based on the main steam standard parameters, the reheat steam standard parameters, the system real-time main steam parameters, the system real-time reheat steam parameters, the first real-time operating information, and the second real-time operating information includes: using the absolute value of the difference between the main steam standard parameters and the system real-time main steam parameters as a first steam deviation value; using the absolute value of the difference between the reheat steam standard parameters and the system real-time reheat steam parameters as a second steam deviation value; using the sum of the first steam deviation value and the second steam deviation value as a total steam deviation value; performing a weighted summation of the total steam deviation value and the first real-time operating information to calculate the first health score of the first turbine generator set; and performing a weighted summation of the total steam deviation value and the second real-time operating information to calculate the second health score of the second turbine generator set.

[0012] In some embodiments of this disclosure, determining the valve openings corresponding to the main steam diversion valve, cold reheat steam combining valve, hot reheat steam diversion valve, and feedwater combining valve based on the target operating mode, the first health score, and the second health score includes: when the target operating mode is a dual-unit parallel operation mode, and the difference between the first health score and the second health score is not greater than a preset difference, determining that the first sub-load of the first turbine generator set is equal to half of the total system load, and the second sub-load of the second turbine generator set is also equal to half of the total system load, so that the first turbine generator set and the second turbine generator set operate in parallel with equal loads; when the target operating mode is a dual-unit parallel operation... In the case where the difference between the first health score and the second health score is greater than a preset difference, the total health score of the first health score and the second health score is calculated, the first ratio of the first health score to the total health score is calculated, the second ratio of the second health score to the total health score is calculated, and the first sub-load of the first turbine generator set is determined to be equal to the product of the total system load and the first ratio, and the second sub-load of the second turbine generator set is determined to be equal to the product of the total system load and the second ratio; based on the first sub-load and the second sub-load, the valve openings corresponding to the main steam diversion valve, the cold reheat steam combining valve, the hot reheat steam diversion valve, and the feedwater combining valve in the one-boiler-two-unit thermal power system are determined respectively.

[0013] In some embodiments of this disclosure, determining the valve openings corresponding to the main steam diversion valve, cold reheat steam merging valve, hot reheat steam diversion valve, and feedwater merging valve based on the target operating mode, the first health score, and the second health score includes: when the target operating mode is a load reconfiguration switching mode and the first health score is greater than or equal to the second health score, determining the first turbine generator set as the main generator set and the second turbine generator set as the auxiliary generator set; when the target operating mode is a load reconfiguration switching mode and the first health score is less than the second health score, determining the second turbine generator set as the main generator set and the first turbine generator set as the auxiliary generator set, and increasing the first sub-load of the main generator set over time according to a preset load switching step within a preset time period, and decreasing the auxiliary generator set over time according to the preset load switching step. The second subload, wherein the preset load switching step is the ratio of the first initial subload of the auxiliary generator set at the start time of the preset time period to the length of the preset time period; when the target operating mode is a single-unit operating mode, and the first health score is greater than or equal to the second health score, the first subload of the first turbine generator set is determined to be the total system load, and the second subload of the second turbine generator set is 0; when the target operating mode is a single-unit operating mode, and the first health score is less than the second health score, the second subload of the second turbine generator set is determined to be the total system load, and the first subload of the first turbine generator set is 0; based on the first subload and the second subload, the valve openings corresponding to the main steam diversion valve, cold reheat steam merging valve, hot reheat steam diversion valve, and feedwater merging valve in the one-boiler-two-unit thermal power system are determined respectively.

[0014] In some embodiments of this disclosure, determining the valve openings corresponding to the main steam diversion valve, cold reheat steam combining valve, hot reheat steam diversion valve, and feedwater combining valve in the one-boiler-two-unit thermal power system based on the first sub-load and the second sub-load includes: when the first sub-load equals the second sub-load, both the main steam diversion valve and the hot reheat steam diversion valve correspond to a first valve opening, and the amount of steam entering the first turbine generator set at the first valve opening is equal to the amount of steam entering the second turbine generator set, so that the steam entering the first turbine generator set and the second turbine generator set are connected. When the steam turbine generator set operates under constant load, the valve openings of the cold reheat steam combining valve and the feedwater combining valve are 100%. When the first sub-load is not equal to the second sub-load, and the first sub-load is not equal to the total system load and the first sub-load is not equal to 0, both the main steam diversion valve and the hot reheat steam diversion valve correspond to the second valve opening. When the second valve opening is set, the steam flow entering the first steam turbine generator set matches the first sub-load, and the steam flow entering the second steam turbine generator set matches the second sub-load. The valve openings of the steam-water combination valve and the feedwater combination valve are both 100%. When the first sub-load equals the total system load, the main steam diversion valve, the hot reheat steam diversion valve, and the cold reheat steam combination valve all correspond to a third valve opening. When the third valve is open, the amount of steam entering the first turbine generator set is the total amount of steam generated by the coal-fired boiler, and the amount of steam entering the second turbine generator set is 0, so that the first turbine generator set can operate alone. The feedwater combination valve corresponds to a fourth valve opening. When the fourth valve is open, the water entering the coal-fired boiler... The amount of steam entering the second turbine generator set is matched with the total load of the system. When the second sub-load is equal to the total load of the system, the main steam diversion valve, the hot reheat steam diversion valve, and the cold reheat steam combining valve all correspond to the fifth valve opening. When the fifth valve is open, the amount of steam entering the second turbine generator set is the total amount of steam generated by the coal-fired boiler, and the amount of steam entering the first turbine generator set is 0, so that the second turbine generator set can operate alone. The feedwater combining valve corresponds to the sixth valve opening. When the sixth valve is open, the amount of water entering the coal-fired boiler matches the total load of the system.

[0015] This disclosure also provides an electronic device, comprising: a memory for storing at least one instruction; and a processor for invoking the instruction stored in the memory to execute the adaptive multi-mode control method of either the second aspect or the second aspect embodiments described above.

[0016] This disclosure also provides a computer-readable storage medium storing at least one executable instruction, which is loaded and executed by a processor to implement the adaptive multi-mode control method of the second aspect and any embodiment of the second aspect described above.

[0017] This disclosure also provides a computer program product comprising: computer program code, which, when executed by a computer, causes the computer to perform the adaptive multi-mode control method of either the second aspect or the embodiment of the second aspect described above.

[0018] Compared with the prior art, this disclosure has the following beneficial effects: This disclosure flexibly couples a coal-fired boiler with two turbine generator sets and their respective independent feedwater reheat modules by setting a main steam diversion valve, a cold reheat steam merging valve, and a hot reheat steam diversion valve, all of which can be uniformly controlled by a control module, forming a one-boiler-two-generator thermal power system. This system can adaptively adjust the opening of each valve based on the standard parameters of the boiler's main steam and reheat steam, the total system load, real-time steam parameters, and the individual operating information of the two units. It flexibly distributes and integrates steam flow, significantly improving the adaptability and stability of the unit under varying loads, peak shaving, and low load conditions compared to traditional one-boiler-one-generator or rigidly connected one-boiler-two-generator structures. It can intelligently switch operating modes according to actual load demand, optimize steam parameter matching and energy distribution, reduce throttling losses and heat exchange losses, and improve the overall energy utilization rate of the unit. Simultaneously, it achieves coordinated control and complementary operation of the two turbine generator sets, reducing equipment wear caused by frequent deep peak shaving of a single unit, extending the unit's service life, and enhancing the operational reliability and scheduling flexibility of the entire thermal power system. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a thermal power system with one boiler and two generators that adaptively adjusts its operating mode, according to an embodiment of this disclosure. Figure 2 This is a schematic diagram of the structure of a coal-fired boiler according to an embodiment of the present disclosure; Figure 3 This is a schematic diagram of a thermal power system with one boiler and two generators, according to another embodiment of the present disclosure, which provides an adaptive adjustment mode for operation. Figure 4 This is a schematic diagram of a thermal power system with one boiler and two generators that includes a control module and an adaptive adjustment mode, according to an embodiment of this disclosure. Figure 5 This is a flowchart illustrating an adaptive multi-mode control method provided according to an embodiment of the present disclosure. Detailed Implementation

[0020] The present disclosure will now be further described with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present disclosure and should not be construed as limiting the scope of protection of the present disclosure. It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application.

[0021] The acquisition, transmission, storage, use, and processing of data in this disclosed technical solution comply with relevant national laws and regulations. In the embodiments of this disclosure, certain existing industry solutions such as software, components, and models may be mentioned. These should be considered exemplary, intended only to illustrate the feasibility of implementing the technical solution of this disclosure, and do not imply that the applicant has already used or necessarily used such solutions.

[0022] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0023] Example 1: The specific structural diagram of the one-boiler-two-unit thermal power system with adaptive adjustment operation mode in this embodiment is as follows: Figure 1 As shown, it includes: The system comprises a first steam turbine generator set 10, a second steam turbine generator set 20, a first feedwater regeneration module 30, a second feedwater regeneration module 40, a coal-fired boiler 50, and a control module 60.

[0024] The outlet of the superheating module 510 of the coal-fired boiler 50 is connected to the first high-pressure steam inlet of the first steam turbine generator set 10 and the second high-pressure steam inlet of the second steam turbine generator set 20 through the main steam diversion valve 001.

[0025] The first high-pressure steam outlet of the first steam turbine generator set 10 and the second high-pressure steam outlet of the second steam turbine generator set 20 are respectively connected to the inlet of the reheat module 520 in the coal-fired boiler 50 through the cold reheat steam confluence valve 002.

[0026] The outlet of the reheat module 520 is connected to the first medium-pressure steam inlet of the first steam turbine generator set 10 and the second medium-pressure steam inlet of the second steam turbine generator set 20 via the hot reheat steam diversion valve 003.

[0027] The first steam turbine generator set 10 is connected to the coal-fired boiler 50 through the first feedwater regeneration module 30, and the second steam turbine generator set 20 is connected to the coal-fired boiler 50 through the second feedwater regeneration module 40. The control module 60 is connected to the main steam diversion valve 001, the cold reheat steam merging valve 002, and the hot reheat steam diversion valve 003, respectively. The control module 60 is used to automatically control the valve openings of the main steam diversion valve 001, the cold reheat steam merging valve 002, and the hot reheat steam diversion valve 003 based on the main steam standard parameters and reheat steam standard parameters of the coal-fired boiler 50, the total system load of the one-boiler-two-generator thermal power system monitored in real time, the real-time main steam parameters and real-time reheat steam parameters of the system, the first real-time operating information of the first steam turbine generator set, and the second real-time operating information of the second steam turbine generator set, so as to realize the automatic adjustment of the operating mode of the one-boiler-two-generator thermal power system.

[0028] Both the first and second steam turbine generator sets are complete sets of equipment that use high-temperature, high-pressure steam as the working fluid to drive generators and generate electricity. Each set includes a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a condenser, and a generator. Specifically, for each turbine generator set, multiple stages of its high-pressure, intermediate-pressure, and low-pressure cylinders are equipped with extraction ports, drawing steam at different pressures as a heat source, which is then fed into the corresponding feedwater regeneration module. In the feedwater regeneration module, this extracted steam transfers heat to the condensate or feedwater in the high-pressure heater, low-pressure heater, and deaerator, completely condensing itself into condensate. The condensate is then returned to the condenser after being recovered in stages. The heated condensate sequentially passes through "four low-pressure heaters → deaerator → three high-pressure heaters" (i.e., the "three high, four low, one deaerator" process), and is finally fed into the coal-fired boiler as high-temperature feedwater. The entire process achieves the cascade utilization of waste heat from the turbine exhaust, significantly improving the system's thermal efficiency. A coal-fired boiler is a thermal energy conversion device that burns coal to produce high-temperature, high-pressure steam. It can simultaneously supply steam to both the first and second steam turbine generator sets, or supply steam to either set alone. The first feedwater regeneration module recovers the waste heat from the extraction steam of the first steam turbine generator set and heats the condensate, sending the heated condensate to the coal-fired boiler. The second feedwater regeneration module recovers the waste heat from the extraction steam of the second steam turbine generator set and heats the condensate, sending the heated condensate to the coal-fired boiler. The superheat module is the heating surface equipment in the coal-fired boiler used to heat saturated steam into high-temperature, high-pressure superheated steam. The reheat module is the heating surface equipment in the coal-fired boiler used to reheat the cold reheated steam discharged from the first and second steam turbine generator sets. Multiple modes include dual-unit parallel operation mode, load reconfiguration switching mode, and single-unit operation mode. By controlling the amount of steam entering the first and second steam turbine generator sets through the control module, a boiler-two-generator thermal power system can adaptively adjust its operating mode to run in different modes. Valve opening degree refers to the degree to which a corresponding valve is open.The standard parameters of main steam refer to the standard parameters of the superheater module of the coal-fired boiler under rated operating conditions; the standard parameters of reheat steam refer to the standard parameters of the reheater module of the coal-fired boiler under rated operating conditions; the total load of the one-boiler-two-generator thermal power system refers to the electrical power that the one-boiler-two-generator thermal power system needs to output; the real-time main steam parameters of the system refer to the actual operating parameters of the superheater module of the coal-fired boiler, representing the current true state of the main steam; the real-time reheat steam parameters of the system refer to the actual operating parameters of the reheater module of the coal-fired boiler, representing the current true state of the reheat steam; the first real-time operating information of the first turbine generator set is used to reflect the real-time equipment status, real-time operating conditions, and real-time operating status of the first turbine generator set; the second real-time operating information of the second turbine generator set is used to reflect the real-time equipment status, real-time operating conditions, and real-time operating status of the second turbine generator set.

[0029] Specifically, the steam discharged from the intermediate-pressure cylinder goes to the low-pressure cylinder, and some of the extracted steam is extracted to the regenerator module. The regenerator module has two main directions: one is that the condensate enters the boiler after passing through three high-pressure, four low-pressure, and one deaeration process; the other is that the extracted steam heats the condensate and then goes to the condenser.

[0030] Specifically, such as Figure 2 As shown, the coal-fired boiler 50 includes: an air preheater 501, a screen-type superheater 502, a water-cooled wall 503, an economizer 504, a high-temperature superheater 505, a low-temperature superheater 506, a high-temperature reheater 507, and a low-temperature reheater 508; the air preheater 501 is located at the very end of the tail flue of the coal-fired boiler; the screen-type superheater 502 is located in the upper part of the furnace of the coal-fired boiler; the economizer 504, the water-cooled wall 503, the low-temperature superheater 506, and the... The high-temperature superheaters 505 are connected in sequence to form the superheating module of the coal-fired boiler 50. The inlet of the economizer 504 is the inlet of the superheating module, and the outlet of the high-temperature superheater 505 is the outlet of the superheating module. The low-temperature reheater 508 is connected to the high-temperature reheater 507 to form the reheating module of the coal-fired boiler 50. The inlet of the low-temperature reheater 508 is the inlet of the reheating module, and the outlet of the high-temperature reheater 507 is the outlet of the reheating module.

[0031] The system includes: an air preheater to heat the combustion air fed into the coal-fired boiler furnace using waste heat from the flue gas, thereby improving combustion efficiency and reducing flue gas temperature; a screen-type superheater to absorb some of the heat from the high-temperature flue gas, protecting the high-temperature superheater and the high-temperature reheater; a water-cooled wall to absorb the radiant heat from the flame in the coal-fired boiler furnace, evaporating water into steam; an economizer to preheat the water in the coal-fired boiler using waste heat from the flue gas, increasing the temperature of the water entering the water-cooled wall and reducing flue gas losses; a low-temperature superheater to receive steam from the water-cooled wall and preheat it before sending the heated steam to the high-temperature superheater for secondary heating to obtain high-temperature, high-pressure steam; and a low-temperature reheater to preheat the cold reheat steam before sending the heated steam to the high-temperature reheater for secondary heating to obtain high-temperature, medium-pressure steam.

[0032] Therefore, by sharing the same reheat module, the first and second steam turbine generator sets ensure that the reheat module absorbs sufficient steam, avoiding the risk of burnout due to insufficient steam intake, and greatly improving the safety and operational stability of the system.

[0033] Specifically, such as Figure 3 As shown, the inlet of the economizer 504 of the coal-fired boiler 50 is connected to the outlet of the first feedwater regeneration module 30 and the outlet of the second feedwater regeneration module 40 respectively through the feedwater confluence valve 004. The feedwater confluence valve 004 is used to collect the condensate from the first feedwater regeneration module 30 and the condensate from the second feedwater regeneration module 40 into the economizer 504, so that the steam supplied by the coal-fired boiler 50 to the first steam turbine generator set 10 and the second steam turbine generator set 20 is converted into condensate and re-enters the economizer 504 in the coal-fired boiler 50.

[0034] Therefore, by setting up a feedwater confluence valve, the water heated by the first and second feedwater regeneration modules is combined and then uniformly fed into the economizer inlet of the coal-fired boiler, achieving efficient integration of the working fluids of the two independent regeneration systems. This not only ensures the stability and uniformity of the feedwater temperature of the coal-fired boiler and improves the heat exchange efficiency of the economizer, but also simplifies the layout of the boiler feedwater system, reduces the number of pipes and valves, lowers equipment investment and maintenance complexity, and further enhances the flexibility, safety, and economy of the "one boiler, two generators" thermal power system under multi-mode operation.

[0035] Specifically, such as Figure 4As shown, the control module 60 is also connected to the feedwater confluence valve 004, and is used to automatically control the valve opening of the feedwater confluence valve 004 based on the main steam standard parameters, reheat steam standard parameters, real-time monitored total load of the one-boiler-two-generator thermal power system, real-time main steam parameters, real-time reheat steam parameters, first real-time operating information of the first turbine generator set, and second real-time operating information of the second turbine generator set.

[0036] Therefore, by connecting the control module to the main steam diversion valve, the cold reheat steam merging valve, the hot reheat steam diversion valve, and the feedwater merging valve respectively, centralized, precise, and coordinated control of key steam and feedwater distribution nodes is achieved. Based on the standard parameters of the main steam and reheat steam of the coal-fired boiler, the real-time monitored total load of the one-boiler-two-generator thermal power system, the real-time main steam parameters, the real-time reheat steam parameters, the first real-time operating information of the first turbine generator set, and the second real-time operating information of the second turbine generator set, the control module controls each turbine generator set to operate at a load that adapts to both the total system load and its own state. It also automatically and dynamically adjusts the valve openings based on the individual state of each turbine generator set and the total system load, ensuring coordinated matching between the main steam, reheat steam, and feedwater flow rates. This allows the system to quickly and accurately switch to an operating mode that matches the total system load and the individual state of each turbine generator set. The control module significantly reduces manual intervention, improves operational reliability and intelligence, and provides strong support for the efficient, flexible and safe participation of the "one boiler, two generators" thermal power system in peak shaving in a grid with high penetration of new energy sources.

[0037] In summary, this adaptive adjustment operating mode of the "one boiler, two generators" thermal power system flexibly couples one coal-fired boiler with two turbine generator units and their respective independent feedwater reheat modules by setting a main steam diversion valve, a cold reheat steam merging valve, and a hot reheat steam diversion valve, all of which can be uniformly controlled by the control module. This system can adaptively adjust the opening of each valve based on the standard parameters of the boiler's main steam and reheat steam, the total system load, real-time steam parameters, and the individual operating information of the two units. It flexibly distributes and integrates steam flow, significantly improving the adaptability and stability of the unit under varying loads, peak shaving, and low load conditions compared to traditional one boiler, one generator, or rigidly connected "one boiler, two generators" structures. It can intelligently switch operating modes according to actual load demand, optimize steam parameter matching and energy distribution, reduce throttling losses and heat exchange losses, and improve the overall energy utilization rate of the unit. Simultaneously, it achieves coordinated control and complementary operation of the two turbine generator units, reducing equipment wear caused by frequent deep peak shaving of a single unit, extending the unit's service life, and enhancing the operational reliability and scheduling flexibility of the entire thermal power system.

[0038] Example 2: This proposal suggests an adaptive multi-mode control method applicable to the control module of a single-boiler, two-unit thermal power system that adaptively adjusts its operating mode. The specific process is as follows: Figure 5 As shown, it includes: Step 5510: Obtain the main steam standard parameters and reheat steam standard parameters of the coal-fired boiler.

[0039] Among them, the standard parameters of main steam refer to the standard parameters of the superheating module of the coal-fired boiler under rated operating conditions; the standard parameters of reheat steam refer to the standard parameters of the reheating module of the coal-fired boiler under rated operating conditions.

[0040] Step 5520: Real-time monitoring of the total system load, real-time main steam parameters, real-time reheat steam parameters, first real-time operating information of the first turbine generator set, and second real-time operating information of the second turbine generator set of the one-boiler-two-generator thermal power system.

[0041] The total system load refers to the active power that a coal-fired power plant with one boiler and two generators in an adaptively adjusted operating mode needs to transmit to the grid. The real-time main steam parameters refer to the actual operating parameters of the superheater module of the coal-fired boiler, representing the current true state of the main steam; the real-time reheat steam parameters refer to the actual operating parameters of the reheater module of the coal-fired boiler, representing the current true state of the reheat steam; the first real-time operating information of the first turbine generator set reflects the real-time equipment status, real-time operating conditions, and real-time operating status of the first turbine generator set; the second real-time operating information of the second turbine generator set reflects the real-time equipment status, real-time operating conditions, and real-time operating status of the second turbine generator set. Specifically, the first real-time operating information includes the first real-time equipment aging rate, the first real-time heat-to-electricity efficiency, the first real-time turbine internal efficiency, the first real-time heat consumption rate, and the first temperature safety margin; the second real-time operating information includes the second real-time equipment aging rate, the second real-time heat-to-electricity efficiency, the second real-time turbine internal efficiency, the second real-time heat consumption rate, and the second temperature safety margin.

[0042] Step 5530: Based on the main steam standard parameters, the reheat steam standard parameters, the system real-time main steam parameters, the system real-time reheat steam parameters, the first real-time operating information, and the second real-time operating information, determine the first health score of the first steam turbine generator set and the second health score of the second steam turbine generator set in the one-boiler-two-unit thermal power system.

[0043] Specifically, in step 5530 above, determining the first health score of the first turbine generator set and the second health score of the second turbine generator set in the one-boiler-two-unit thermal power system based on the main steam standard parameters, the reheat steam standard parameters, the system real-time main steam parameters, the system real-time reheat steam parameters, the first real-time operating information, and the second real-time operating information includes: using the absolute value of the difference between the main steam standard parameters and the system real-time main steam parameters as the first steam deviation value; using the absolute value of the difference between the reheat steam standard parameters and the system real-time reheat steam parameters as the second steam deviation value; using the sum of the first steam deviation value and the second steam deviation value as the total steam deviation value; performing a weighted summation of the total steam deviation value and the first real-time operating information to calculate the first health score of the first turbine generator set; and performing a weighted summation of the total steam deviation value and the second real-time operating information to calculate the second health score of the second turbine generator set.

[0044] For example, the first real-time operating information includes the first real-time equipment aging rate, the first real-time heat-to-electricity efficiency, the first real-time turbine internal efficiency, the first real-time heat loss rate, and the first temperature safety margin; the first health score of the first turbine generator set is calculated by weighted summation of the total steam deviation value and the first real-time operating information, as shown in the following formula: , in, First Health Score; It is the first weight; The first real-time equipment aging rate; As the second weight; The highest real-time heat-to-electricity efficiency; It is the third weight; The first real-time internal efficiency of the steam turbine; It is the fourth weight; The first real-time heat dissipation rate; It is the fifth weight; This represents the total steam deviation value; It is the sixth weight; As the first temperature safety margin, .

[0045] For example, the second real-time operating information includes the second real-time equipment aging rate, the second real-time heat-to-electricity efficiency, the second real-time turbine internal efficiency, the second real-time heat loss rate, and the second temperature safety margin. The total steam deviation value and the second real-time operating information are weighted and summed to calculate the second health score of the second turbine generator set, as shown in the following formula: , in, For the second health score; It is the first weight; The second real-time equipment aging rate; As the second weight; This represents the second real-time heat-to-electricity conversion efficiency; It is the third weight; The second real-time turbine internal efficiency; It is the fourth weight; This is the second real-time heat rate; It is the fifth weight; This represents the total steam deviation value; It is the sixth weight; This is the second temperature safety margin.

[0046] Step 5540: Based on the first health score, the second health score, the preset basic minimum load ratio coefficient, the preset health status correction coefficient, the preset two-unit health status difference correction coefficient, the preset low load condition correction coefficient, the total system load, and the system rated load, determine the minimum threshold for the high energy conversion load of the one-boiler two-unit thermal power system.

[0047] Specifically, in step 5540 above, determining the minimum high-energy conversion load threshold of the one-boiler-two-unit thermal power system based on the first health score, the second health score, the preset basic minimum load ratio coefficient, the preset health status correction coefficient, the preset two-unit health status difference correction coefficient, the preset low-load condition correction coefficient, the total system load, and the system rated load includes: using a first preset formula to apply the first health score, the second health score, the preset basic minimum load ratio coefficient, the preset health status correction coefficient, the preset two-unit health status difference correction coefficient, the preset low-load condition correction coefficient, the total system load, and the system rated load to the following parameters: The first high-energy conversion load minimum threshold of the first steam turbine generator set is obtained by calculating the constant load. The second high-energy conversion load minimum threshold of the second steam turbine generator set is obtained by calculating the first health score, the second health score, the preset basic minimum load ratio coefficient, the preset health status correction coefficient, the preset two-machine health status difference correction coefficient, the preset low load condition correction coefficient, the total system load, and the system rated load using the second preset formula. The sum of the first high-energy conversion load minimum threshold and the second high-energy conversion load minimum threshold is taken as the system high-energy conversion load minimum threshold of the one-boiler two-generator thermal power system.

[0048] The rated load of the system refers to the maximum active power that a thermal power system with one boiler and two generators can output under the design conditions for long-term safe and stable operation.

[0049] Furthermore, the first preset formula is used to calculate the first health score, the second health score, the preset basic minimum load ratio coefficient, the preset health status correction coefficient, the preset two-machine health status difference correction coefficient, the preset low load condition correction coefficient, the total system load, and the system rated load to obtain the first high energy conversion load minimum threshold of the first steam turbine generator set, expressed as: , The second preset formula is used to calculate the first health score, the second health score, the preset basic minimum load ratio coefficient, the preset health status correction coefficient, the preset two-machine health status difference correction coefficient, the preset low load condition correction coefficient, the total system load, and the system rated load to obtain the second high-energy conversion load minimum threshold of the second steam turbine generator set, expressed as: , in, This is the minimum threshold for the first high-energy conversion load; The minimum threshold for the second highest energy conversion load; The preset minimum load ratio coefficient; Preset health status correction coefficient; To preset the correction coefficient for the difference in health status between the two machines; This is a preset correction factor for low-load operating conditions; This is the system's rated load. This represents the total system load. .

[0050] Step 5550: Based on the minimum threshold of the high-energy conversion load of the system and the total load of the system, select a target operating mode that matches the total load of the system from the preset operating modes. The preset operating modes include dual-machine parallel operating mode, load reconfiguration switching mode and single-machine operating mode.

[0051] The dual-unit parallel operation mode refers to the simultaneous operation of the first and second steam turbine generator units in a single-boiler, two-generator thermal power system. The load reconfiguration switching mode refers to gradually increasing the load level of one steam turbine generator unit while gradually decreasing the load level of the other steam turbine generator unit within a preset time period, so as to completely switch the load level of one steam turbine generator unit to the other steam turbine generator unit within the preset time period. The single-unit operation mode refers to one steam turbine generator unit bearing the entire system load, while the other steam turbine generator unit is in a shutdown or standby state.

[0052] Specifically, in step 5550 above, based on the minimum threshold of the system's high-energy conversion load and the total system load, a target operating mode matching the total system load is selected from preset operating modes, including: when the total system load is greater than the minimum threshold of the system's high-energy conversion load, the target operating mode is a dual-machine parallel operating mode; when the total system load is equal to the minimum threshold of the system's high-energy conversion load, the target operating mode is a load reconfiguration switching mode; when the total system load is less than the minimum threshold of the system's high-energy conversion load, the target operating mode is a single-machine operating mode.

[0053] Therefore, this method compares the total system load with the minimum threshold for high-energy conversion load to achieve adaptive selection of dual-unit parallel operation mode, load reconfiguration switching mode, and single-unit operation mode. When the load is higher than the high-efficiency operation threshold, dual-unit parallel operation is adopted to fully utilize the synergistic power generation capacity of the two units and improve the overall system output and operating efficiency. When the load is in the critical high-efficiency range, the system automatically enters the load reconfiguration switching mode to achieve a smooth transition of operating conditions through gradual load transfer, avoiding drastic fluctuations in steam parameters and unit load. When the load is lower than the high-efficiency operation threshold, the system switches to single-unit operation mode to reduce throttling losses and energy waste caused by simultaneous operation of two units under low load. This mode selection logic is clear and the response is timely, enabling the system to always match the optimal operating mode according to the actual load level, effectively improving the energy conversion efficiency of a single-boiler, two-unit thermal power system over a wide load range, enhancing the adaptability and operational stability of the unit under varying operating conditions, while reducing unit losses and improving overall economy and reliability.

[0054] Step 5560: Based on the target operating mode, the first health score, and the second health score, determine the valve openings corresponding to the main steam diversion valve, the cold reheat steam merging valve, the hot reheat steam diversion valve, and the feedwater merging valve, respectively.

[0055] Specifically, in step 5560 above, determining the valve openings corresponding to the main steam diversion valve, cold reheat steam combining valve, hot reheat steam diversion valve, and feedwater combining valve based on the target operating mode, the first health score, and the second health score includes: when the target operating mode is a dual-unit parallel operation mode, and the difference between the first health score and the second health score is not greater than a preset difference, determining that the first sub-load of the first turbine generator set is equal to half of the total system load, and the second sub-load of the second turbine generator set is also equal to half of the total system load, so that the first turbine generator set and the second turbine generator set operate in parallel with equal loads; when the target operating mode is a dual-unit parallel operation mode... In the row mode, when the difference between the first health score and the second health score is greater than a preset difference, the total health score of the first health score and the second health score is calculated, the first ratio of the first health score to the total health score is calculated, the second ratio of the second health score to the total health score is calculated, and the first sub-load of the first steam turbine generator set is determined to be equal to the product of the total system load and the first ratio, and the second sub-load of the second steam turbine generator set is determined to be equal to the product of the total system load and the second ratio; based on the first sub-load and the second sub-load, the valve openings corresponding to the main steam diversion valve, the cold reheat steam combining valve, the hot reheat steam diversion valve, and the feedwater combining valve in the one-boiler-two-unit thermal power system are determined respectively.

[0056] Furthermore, before determining the valve openings corresponding to the main steam diversion valve, cold reheat steam combining valve, hot reheat steam diversion valve, and feedwater combining valve in the one-boiler-two-unit thermal power system based on the first sub-load and the second sub-load, the method further includes: when the target operating mode is a dual-unit parallel operating mode, if the first sub-load is less than the first high-energy conversion load minimum threshold and the second sub-load is not less than the second high-energy conversion load minimum threshold, or if the first sub-load is less than the first high-energy conversion load minimum threshold and the second sub-load is less than the second high-energy conversion load minimum threshold, the target operating mode is updated to the load reconfiguration switching mode, and the second turbine generator set is determined as the main generator set, and the first turbine generator set is determined as the... The auxiliary generator set; when the target operating mode is a dual-generator parallel operating mode, if the first sub-load is not less than the first high-energy conversion load minimum threshold and the second sub-load is less than the second high-energy conversion load minimum threshold, the target operating mode is updated to the load reconfiguration switching mode, the first turbine generator set is determined as the main generator set and the second turbine generator set is determined as the auxiliary generator set; and the first sub-load of the main generator set is increased over time according to a preset load switching step within a preset time period, and the second sub-load of the auxiliary generator set is decreased over time according to the preset load switching step, wherein the preset load switching step is the ratio of the first initial sub-load of the auxiliary generator set at the start time of the preset time period to the length of the preset time period.

[0057] Therefore, in the dual-unit parallel operation mode, this control method determines the sub-load based on the difference in health scores between the two turbine generator units, using either equal load allocation or allocation according to the health score ratio. This ensures that the unit load allocation is highly matched with its own health status, guaranteeing balanced and stable operation of both units while allowing the unit in better condition to bear a higher load, thus improving the overall system's operational safety and energy conversion efficiency. Simultaneously, it uses the minimum threshold for high-energy conversion load for each unit to determine the operating condition. When the sub-load falls below the high-efficiency operating range, the operating mode is automatically switched to load reconfiguration switching mode, using the unit in better health as the main generator unit for smooth load adjustment. This avoids the unit operating in inefficient, low-load ranges for extended periods, reducing throttling losses and equipment wear. Through this progressive logic control and precise matching of valve openings, adaptive optimization switching of the operating mode can be achieved, ensuring the system always operates within a high-efficiency, stable, and safe operating range. This significantly enhances the adjustment flexibility, control accuracy, and overall economy of a single-boiler, two-generator thermal power system under varying load conditions.

[0058] Specifically, in step 5560 above, determining the valve openings corresponding to the main steam diversion valve, cold reheat steam merging valve, hot reheat steam diversion valve, and feedwater merging valve based on the target operating mode, the first health score, and the second health score includes: when the target operating mode is a load reconfiguration switching mode, and the first health score is greater than or equal to the second health score, determining the first turbine generator set as the main generator set and the second turbine generator set as the auxiliary generator set; when the target operating mode is a load reconfiguration switching mode, and the first health score is less than the second health score, determining the second turbine generator set as the main generator set and the first turbine generator set as the auxiliary generator set, and within a preset time period, increasing the first sub-load of the main generator set according to a preset load switching step over time, and decreasing the load of the auxiliary generator set according to the preset load switching step over time. The second subload of the group, the preset load switching step is the ratio of the first initial subload of the auxiliary generator set at the start time of the preset time period to the length of the preset time period; when the target operating mode is single-unit operating mode, and the first health score is greater than or equal to the second health score, the first subload of the first turbine generator set is determined to be the total system load, and the second subload of the second turbine generator set is 0; when the target operating mode is single-unit operating mode, and the first health score is less than the second health score, the second subload of the second turbine generator set is determined to be the total system load, and the first subload of the first turbine generator set is 0; based on the first subload and the second subload, the valve openings corresponding to the main steam diversion valve, cold reheat steam combining valve, hot reheat steam diversion valve and feedwater combining valve in the one-boiler-two-generator thermal power system are determined respectively.

[0059] Therefore, this control strategy intelligently determines the primary and secondary generator units and performs graded load allocation by combining the target operating mode with the health scores of the two turbine generator units. In the load reconfiguration switching mode, the load of the primary and secondary units is smoothly adjusted according to a fixed step size and preset time period, which can avoid steam parameter fluctuations and unit impacts caused by sudden load changes and achieve a seamless transition between modes. In the single-unit operation mode, the unit with better health status is given priority to bear the entire system load, ensuring the safety and reliability of unit operation. At the same time, the opening degree of each valve is precisely matched according to the final determined sub-load, which allows steam distribution, reheat merging and feedwater regulation to dynamically adapt to load changes throughout the process. This not only makes full use of the unit with high health status to improve the overall system operation stability, but also reduces the risk of deteriorated units operating with defects, reduces equipment fatigue wear, and improves the smoothness of regulation, control accuracy and operation economy of the one-boiler-two-generator thermal power system during peak shaving and changing operating conditions.

[0060] Furthermore, determining the valve openings of the main steam diversion valve, cold reheat steam combining valve, hot reheat steam diversion valve, and feedwater combining valve in the one-boiler-two-unit thermal power system based on the first sub-load and the second sub-load includes: when the first sub-load equals the second sub-load, both the main steam diversion valve and the hot reheat steam diversion valve correspond to the first valve opening, and when the first valve opening is set, the amount of steam entering the first turbine generator set is equal to the amount of steam entering the second turbine generator set, so that the steam flow between the first turbine generator set and the second turbine generator set is equal. When the unit operates at constant load, the valve openings of the cold reheat steam combining valve and the feedwater combining valve are 100%. When the first sub-load is not equal to the second sub-load, and the first sub-load is not equal to the total system load and the first sub-load is not equal to 0, both the main steam diversion valve and the hot reheat steam diversion valve correspond to the second valve opening. When the second valve opening is set, the steam flow entering the first turbine generator unit matches the first sub-load, and the steam flow entering the second turbine generator unit matches the second sub-load. The cold reheat steam combining valve... The valve opening corresponding to the feedwater combining valve is 100%. When the first sub-load equals the total system load, the main steam diversion valve, the hot reheat steam diversion valve, and the cold reheat steam combining valve all correspond to the third valve opening. When the third valve is open, the steam entering the first turbine generator set is the total steam generated by the coal-fired boiler, and the steam entering the second turbine generator set is 0, so that the first turbine generator set operates alone. The feedwater combining valve corresponds to the fourth valve opening. When the fourth valve is open, the water entering the coal-fired boiler is equal to... The total system load is matched; when the second sub-load is equal to the total system load, the main steam diversion valve, the hot reheat steam diversion valve, and the cold reheat steam combining valve all correspond to the fifth valve opening. When the fifth valve is open, the amount of steam entering the second turbine generator set is the total amount of steam generated by the coal-fired boiler, and the amount of steam entering the first turbine generator set is 0, so that the second turbine generator set can operate alone. The feedwater combining valve corresponds to the sixth valve opening. When the sixth valve is open, the amount of water entering the coal-fired boiler matches the total system load.

[0061] Therefore, by setting differentiated opening control logic for the main steam diversion valve, hot reheat steam diversion valve, cold reheat steam merging valve, and feedwater merging valve based on the relationship between the first and second sub-loads, precise distribution and rapid response of steam and feedwater flow can be achieved under different operating conditions, such as equal load for both units, unequal load for both units, single operation of the first unit, and single operation of the second unit. When both units are operating in parallel, steam can be evenly distributed according to load ratio or on demand, with the cold reheat and feedwater loops fully open to reduce flow losses. In single-unit operation mode, all boiler steam can be directed to the corresponding unit, matched with the corresponding feedwater flow, avoiding steam diversion and ineffective backflow, and improving energy utilization. This control method has clear logic and reliable switching, ensuring matching of steam and feedwater system operating conditions under different modes, reducing throttling losses and energy waste, and improving the adjustment accuracy, operational stability, and energy conversion efficiency of a single-boiler, two-unit thermal power system during load changes and mode switching.

[0062] Step 5570, and based on the valve opening degree of the main steam diversion valve, the cold reheat steam merging valve, the hot reheat steam diversion valve and the feedwater merging valve respectively, control the opening degree of the corresponding valves so that the one-boiler-two-unit thermal power system operates in the target operating mode.

[0063] In summary, this adaptive multi-mode control method comprehensively collects boiler standard steam parameters, real-time system load, steam parameters, and operating information of two steam turbine generator sets to quantify the unit health score. It also dynamically determines the minimum threshold of high-energy conversion load of the system by combining multiple preset correction coefficients. This method can accurately match the total system load with the corresponding target operating mode and realize intelligent switching between dual-unit parallel operation, load reconfiguration switching, and single-unit operation. During the control process, the opening degrees of the main steam diversion valve, cold reheat steam merging valve, hot reheat steam diversion valve, and feedwater merging valve can be coordinated according to the target operating mode and the unit's health status. This ensures that the steam distribution, reheat merging, and feedwater regeneration systems are highly adapted to the current load and unit status, guaranteeing efficient energy conversion across different load ranges and improving overall thermal economy. It also avoids overload operation of the unit under unhealthy conditions, reducing equipment wear and failure risks. Furthermore, it enables adaptive and smooth switching of operating modes, preventing sudden changes in operating conditions from impacting the system. This significantly enhances the operational stability, control precision, and intelligence level of the one-boiler-two-unit thermal power system under peak shaving and load variation scenarios.

[0064] Example 3: This disclosure also provides an electronic device, comprising: a memory for storing at least one instruction; and a processor for invoking the instruction stored in the memory to execute the adaptive multi-mode control method in any of the above embodiments.

[0065] Example 4: This disclosure also provides a computer-readable storage medium storing at least one executable instruction, which is loaded and executed by a processor to implement the adaptive multi-mode control method in any of the above embodiments.

[0066] Example 5: This disclosure also provides a computer program product, which includes computer program code that, when executed by a computer, causes the computer to perform the adaptive multi-mode control method in any of the above embodiments.

[0067] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, systems, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0068] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0069] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0070] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0071] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0072] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, like read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0073] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0074] It should be noted that the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Terms such as "including" or "contains" mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility of covering other elements as well.

[0075] Although operations are described in a specific order in the accompanying drawings in this disclosure, it should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0076] Finally, it should be noted that the above content is only used to illustrate the technical solution of this disclosure, and is not intended to limit the scope of protection of this disclosure. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this disclosure do not depart from the substance and scope of the technical solution of this disclosure.

Claims

1. A thermal power system with one boiler and two generators that automatically adjusts its operating mode, characterized in that, include: The system comprises a first steam turbine generator set, a second steam turbine generator set, a first feedwater regeneration module, a second feedwater regeneration module, a coal-fired boiler, and a control module. The outlet of the superheating module of the coal-fired boiler is connected to the first high-pressure steam inlet of the first steam turbine generator set and the second high-pressure steam inlet of the second steam turbine generator set through the main steam diversion valve. The first high-pressure steam outlet of the first steam turbine generator set and the second high-pressure steam outlet of the second steam turbine generator set are respectively connected to the inlet of the reheat module in the coal-fired boiler through a cold reheat steam confluence valve. The outlet of the reheat module is connected to the first medium-pressure steam inlet of the first steam turbine generator set and the second medium-pressure steam inlet of the second steam turbine generator set via a hot reheat steam diversion valve. The first steam turbine generator set is connected to the coal-fired boiler through the first feedwater regeneration module, and the second steam turbine generator set is connected to the coal-fired boiler through the second feedwater regeneration module; The control module is connected to the main steam diversion valve, the cold reheat steam merging valve, and the hot reheat steam diversion valve, respectively. The control module is used to automatically control the valve opening of the main steam diversion valve, the cold reheat steam merging valve, and the hot reheat steam diversion valve based on the main steam standard parameters and reheat steam standard parameters of the coal-fired boiler, the total system load of the one-boiler-two-generator thermal power system monitored in real time, the real-time main steam parameters and real-time reheat steam parameters of the system, the first real-time operating information of the first turbine generator set, and the second real-time operating information of the second turbine generator set, so as to realize the automatic adjustment of the operating mode of the one-boiler-two-generator thermal power system.

2. The thermal power system with one boiler and two generators that adaptively adjusts its operating mode according to claim 1, characterized in that, The coal-fired boiler includes: Air preheater, screen-type superheater, water-cooled wall, economizer, high-temperature superheater, low-temperature superheater, high-temperature reheater and low-temperature reheater; The air preheater is located at the very end of the tail flue of the coal-fired boiler. The screen-type superheater is installed in the upper part of the furnace of the coal-fired boiler; The economizer, the water-cooled wall, the low-temperature superheater, and the high-temperature superheater are connected in sequence to form the superheating module of the coal-fired boiler. The inlet of the economizer is the inlet of the superheating module, and the outlet of the high-temperature superheater is the outlet of the superheating module. The low-temperature reheater and the high-temperature reheater are connected to form the reheat module of the coal-fired boiler. The inlet of the low-temperature reheater is the inlet of the reheat module, and the outlet of the high-temperature reheater is the outlet of the reheat module.

3. The thermal power system with one boiler and two generators that adaptively adjusts its operating mode according to claim 2, characterized in that, The inlet of the economizer of the coal-fired boiler is connected to the outlet of the first feedwater regeneration module and the outlet of the second feedwater regeneration module through a feedwater confluence valve. The feedwater confluence valve is used to collect the condensate from the first feedwater regeneration module and the condensate from the second feedwater regeneration module into the economizer, so that the steam supplied by the coal-fired boiler to the first steam turbine generator set and the second steam turbine generator set is converted into condensate and re-enters the economizer in the coal-fired boiler.

4. The thermal power system with one boiler and two generators that adaptively adjusts its operating mode according to claim 3, characterized in that, The control module is also connected to the feedwater confluence valve and is used to automatically control the valve opening of the feedwater confluence valve based on the main steam standard parameters, reheat steam standard parameters of the coal-fired boiler, the total system load of the one-boiler-two-generator thermal power system monitored in real time, the real-time main steam parameters, the real-time reheat steam parameters, the first real-time operating information of the first turbine generator set, and the second real-time operating information of the second turbine generator set.

5. An adaptive multi-mode control method, characterized in that, Control modules applicable to a single-boiler, two-unit thermal power system include: Obtain the main steam standard parameters and reheat steam standard parameters of the coal-fired boiler; The real-time monitoring includes the total system load, real-time main steam parameters, real-time reheat steam parameters, first real-time operating information of the first turbine generator set, and second real-time operating information of the second turbine generator set of the one-boiler-two-unit thermal power system. Based on the main steam standard parameters, the reheat steam standard parameters, the system real-time main steam parameters, the system real-time reheat steam parameters, the first real-time operating information, and the second real-time operating information, the first health score of the first steam turbine generator set and the second health score of the second steam turbine generator set in the one-boiler-two-unit thermal power system are determined. The minimum threshold for high-energy conversion load of the one-boiler-two-unit thermal power system is determined based on the first health score, the second health score, the preset basic minimum load ratio coefficient, the preset health status correction coefficient, the preset two-unit health status difference correction coefficient, the preset low load condition correction coefficient, the total system load, and the system rated load. Based on the minimum threshold of the high-energy conversion load of the system and the total load of the system, a target operating mode that matches the total load of the system is selected from the preset operating modes. The preset operating modes include dual-machine parallel operating mode, load reconfiguration switching mode and single-machine operating mode. Based on the target operating mode, the first health score and the second health score, determine the valve openings corresponding to the main steam diversion valve, the cold reheat steam merging valve, the hot reheat steam diversion valve and the feedwater merging valve respectively. The opening degree of the corresponding valves is controlled based on the valve opening degree of the main steam diversion valve, the cold reheat steam merging valve, the hot reheat steam diversion valve, and the feedwater merging valve, so that the one-boiler-two-unit thermal power system can operate in the target operating mode.

6. The adaptive multi-mode control method according to claim 5, characterized in that, The determination of the minimum high-energy conversion load threshold for the one-boiler, two-unit thermal power system based on the first health score, the second health score, a preset basic minimum load ratio coefficient, a preset health status correction coefficient, a preset two-unit health status difference correction coefficient, a preset low-load condition correction coefficient, the total system load, and the system rated load includes: The first high-energy conversion load minimum threshold of the first steam turbine generator set is obtained by using the first preset formula to calculate the first health score, the second health score, the preset basic minimum load ratio coefficient, the preset health status correction coefficient, the preset two-machine health status difference correction coefficient, the preset low load condition correction coefficient, the total system load, and the system rated load. The second high-energy conversion load minimum threshold of the second steam turbine generator set is obtained by using the second preset formula to calculate the first health score, the second health score, the preset basic minimum load ratio coefficient, the preset health status correction coefficient, the preset two-machine health status difference correction coefficient, the preset low load condition correction coefficient, the total system load, and the system rated load. The sum of the first minimum high-energy conversion load threshold and the second minimum high-energy conversion load threshold is taken as the minimum high-energy conversion load threshold of the one-boiler-two-unit thermal power system.

7. The adaptive multi-mode control method according to claim 6, characterized in that, The method utilizes a first preset formula to calculate the first health score, the second health score, the preset basic minimum load ratio coefficient, the preset health status correction coefficient, the preset two-machine health status difference correction coefficient, the preset low load condition correction coefficient, the total system load, and the system rated load to obtain the first high-energy conversion load minimum threshold of the first steam turbine generator set, expressed as: ， The second preset formula is used to calculate the first health score, the second health score, the preset basic minimum load ratio coefficient, the preset health status correction coefficient, the preset two-machine health status difference correction coefficient, the preset low load condition correction coefficient, the total system load, and the system rated load to obtain the second high-energy conversion load minimum threshold of the second steam turbine generator set, expressed as: ， in, This is the minimum threshold for the first high-energy conversion load; The minimum threshold for the second highest energy conversion load; The preset minimum load ratio coefficient; Preset health status correction coefficient; To preset the correction coefficient for the difference in health status between the two machines; This is a preset correction factor for low-load operating conditions; This is the system's rated load. This represents the total system load. .

8. The adaptive multi-mode control method according to claim 5, characterized in that, The determination of the first health score of the first turbine generator set and the second health score of the second turbine generator set in the one-boiler-two-unit thermal power system based on the main steam standard parameters, the reheat steam standard parameters, the system real-time main steam parameters, the system real-time reheat steam parameters, the first real-time operating information, and the second real-time operating information includes: The absolute value of the difference between the main steam standard parameter and the real-time main steam parameter of the system is taken as the first steam deviation value; The absolute value of the difference between the standard reheat steam parameter and the real-time reheat steam parameter of the system is taken as the second steam deviation value; The sum of the first steam deviation value and the second steam deviation value is taken as the total steam deviation value; The first health score of the first steam turbine generator set is calculated by weighted summation of the total steam deviation value and the first real-time operating information. The second health score of the second steam turbine generator set is calculated by weighted summation of the total steam deviation value and the second real-time operating information.

9. The adaptive multi-mode control method according to claim 6, characterized in that, The determination of the valve openings corresponding to the main steam diversion valve, cold reheat steam combining valve, hot reheat steam diversion valve, and feedwater combining valve based on the target operating mode, the first health score, and the second health score includes: When the target operating mode is a dual-machine parallel operating mode, and the difference between the first health score and the second health score is not greater than a preset difference, the first sub-load of the first turbine generator set is determined to be equal to half of the total system load, and the second sub-load of the second turbine generator set is also equal to half of the total system load, so that the first turbine generator set and the second turbine generator set operate in parallel with equal loads. When the target operating mode is a dual-machine parallel operating mode, and the difference between the first health score and the second health score is greater than a preset difference, calculate the total health score of the first health score and the second health score, calculate the first ratio of the first health score to the total health score, calculate the second ratio of the second health score to the total health score, and determine that the first sub-load of the first turbine generator set is equal to the product of the total system load and the first ratio, and determine that the second sub-load of the second turbine generator set is equal to the product of the total system load and the second ratio; Based on the first sub-load and the second sub-load, determine the valve openings corresponding to the main steam diversion valve, cold reheat steam combination valve, hot reheat steam diversion valve, and feedwater combination valve in the one-boiler-two-unit thermal power system.

10. The adaptive multi-mode control method according to claim 9, characterized in that, The determination of the valve openings corresponding to the main steam diversion valve, cold reheat steam combining valve, hot reheat steam diversion valve, and feedwater combining valve based on the target operating mode, the first health score, and the second health score includes: When the target operating mode is load reconfiguration switching mode, and the first health score is greater than or equal to the second health score, the first turbine generator set is determined to be the main generator set and the second turbine generator set is determined to be the auxiliary generator set. When the target operating mode is load reconfiguration switching mode, and the first health score is less than the second health score, the second turbine generator set is determined to be the main generator set and the first turbine generator set is determined to be the auxiliary generator set. Within a preset time period, the first sub-load of the main generator set is increased over time according to a preset load switching step, and the second sub-load of the auxiliary generator set is decreased over time according to the preset load switching step. The preset load switching step is the ratio of the first initial sub-load of the auxiliary generator set at the start of the preset time period to the length of the preset time period. When the target operating mode is a single-unit operating mode, and the first health score is greater than or equal to the second health score, the first sub-load of the first turbine generator set is determined to be the total load of the system, and the second sub-load of the second turbine generator set is 0. When the target operating mode is a single-unit operating mode and the first health score is less than the second health score, the second sub-load of the second turbine generator set is determined to be the total load of the system, and the first sub-load of the first turbine generator set is 0. Based on the first sub-load and the second sub-load, determine the valve openings corresponding to the main steam diversion valve, cold reheat steam combination valve, hot reheat steam diversion valve, and feedwater combination valve in the one-boiler-two-unit thermal power system.

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