Double-thermal-power-generating-unit binding power generation device and method

Abstract

The invention discloses a double-thermal-power-generating-unit binding power generation device and method, relates to the technical field of thermal power generation, and mainly aims to improve the overall power generation efficiency of thermal power generating units. According to the main technical scheme, corresponding steam connecting pipes are arranged among high-pressure cylinders, medium-pressure cylinders and low-pressure cylinders of the two thermal power generating units respectively and used for mutual steam supply, and vent valves are arranged at steam exhaust ports of the high-pressure cylinders and the medium-pressure cylinders of the two thermal power generating units and used for maintaining vacuum of cylinder bodies when cylinder switching operation is executed on the high-pressure cylinders or the medium-pressure cylinders. Ventilation valves of the two thermal power generating units and low-pressure cylinders of the two thermal power generating units are communicated with the condenser vacuumizing device and used for maintaining the vacuum state of simultaneous operation of multiple cylinder bodies in the high-pressure cylinder, the medium-pressure cylinder and the low-pressure cylinder, and the central control unit is electrically connected with the two thermal power generating units, the steam communication valve, the ventilation valves and the condenser vacuumizing device. And the central control unit receives a power grid AGC total load instruction and controls the two thermal power generating units to execute power generation operation according to the determined target load distribution strategy.

Description

Technical Field

[0001] This application relates to the field of thermal power generation technology, and in particular to a dual thermal power unit bonding power generation device and method. Background Technology

[0002] With the rapid development of new energy sources, the inherent volatility of their output has prompted thermal power units to gradually shift from being the traditional main power source to undertaking deep peak-shaving tasks. For example, when photovoltaic output increases significantly at midday, thermal power units need to significantly reduce their output in order to maintain the balance between power supply and demand in the power system, sometimes even to below 30% of their rated capacity, and may operate at low load for extended periods.

[0003] Currently, existing thermal power units are typically operated independently, generally employing a "one boiler, one turbine" unit configuration. In this structure, a decrease in unit load directly leads to a significant drop in the power generation efficiency of the corresponding boiler and turbine, resulting in low overall power generation efficiency for the thermal power unit. Therefore, the rigid coupling structure of "one boiler, one turbine" makes it difficult for a single, independently operating thermal power unit to escape its inefficient operating range, and improvements to optimize the power generation efficiency of a single unit are limited by its independent operating characteristics. In light of this, a new unit configuration mode is urgently needed to improve the overall power generation efficiency of thermal power units. Summary of the Invention

[0004] In view of the above problems, this application provides a dual thermal power unit binding power generation device and method, the main purpose of which is to improve the overall power generation efficiency of thermal power units.

[0005] To solve the above-mentioned technical problems, this application proposes the following solution: In a first aspect, this application provides a dual thermal power unit bonding power generation device, the device comprising: Two thermal power units, a high-pressure steam connection pipe, a medium-pressure steam connection pipe, a low-pressure steam connection pipe, ventilation valves, a condenser vacuum pumping device, and a central control unit. The high-pressure steam connection pipe, the medium-pressure steam connection pipe, and the low-pressure steam connection pipe are respectively equipped with high-pressure steam connection valves, medium-pressure steam connection valves, and low-pressure steam connection valves. The high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe are respectively connected to the high-pressure cylinder, the medium-pressure cylinder, and the low-pressure cylinder of the two thermal power units for mutual steam supply. The ventilation valves are respectively installed at the exhaust ports of the high-pressure cylinder and the intermediate-pressure cylinder of the two thermal power units, and are used to maintain the cylinder vacuum when performing cylinder cutting operation on the high-pressure cylinder or the intermediate-pressure cylinder. The condenser vacuum equipment is connected to the ventilation valves of the two thermal power units and the low-pressure cylinders of the two thermal power units, and is used to maintain the vacuum state in which multiple cylinders in the high-pressure cylinder, intermediate-pressure cylinder and low-pressure cylinder operate simultaneously. The central control unit is electrically connected to the two thermal power units, the high-pressure steam interconnection valve, the medium-pressure steam interconnection valve, the low-pressure steam interconnection valve, the ventilation valve, and the condenser vacuum equipment, respectively. It is used to receive the total load command of the power grid AGC, determine the target load allocation strategy based on the total load command, and control the two thermal power units to perform power generation operations according to the target load allocation strategy. The target load allocation strategy is used to characterize the strategy of dynamically allocating the operating load between the high-pressure cylinder, medium-pressure cylinder, and low-pressure cylinder of the two thermal power units based on different load segments.

[0006] In some modified embodiments of the first aspect of this application, the aforementioned dual thermal power unit binding power generation device, the two ends of the high-pressure steam connecting pipe are respectively connected to the main steam header of the two thermal power units, for realizing high-pressure steam mutual supply between the two thermal power units, and the main steam header is located between the boiler outlet and the high-pressure cylinder steam inlet. The two ends of the medium-pressure steam connecting pipe are respectively connected to the reheat steam header of the two thermal power units, which is used to realize the mutual supply of medium-pressure reheat steam between the two thermal power units. The reheat steam header is located between the reheater outlet and the medium-pressure cylinder inlet. The two ends of the low-pressure steam connecting pipe are respectively connected to the low-pressure steam headers of the two thermal power units, which are used to realize the mutual supply of low-pressure steam between the two thermal power units. The low-pressure steam header is located between the exhaust port of the intermediate-pressure cylinder and the inlet port of the low-pressure cylinder. The high-pressure steam connection pipe, the medium-pressure steam connection pipe, and the low-pressure steam connection pipe are respectively equipped with high-pressure steam connection valves, medium-pressure steam connection valves, and low-pressure steam connection valves. The high-pressure steam connection valves, medium-pressure steam connection valves, and low-pressure steam connection valves are used to regulate and control the steam supply between the high-pressure cylinder, medium-pressure cylinder, and low-pressure cylinder of the two thermal power units.

[0007] In some modified embodiments of the first aspect of this application, when the aforementioned dual thermal power unit bundled power generation device is integrated with the high-pressure main steam valve and the high-pressure main steam regulating valve on the main steam header, the connection point of the high-pressure main steam connecting pipe and the main steam header is located on the inlet side of the high-pressure main steam valve. The high-pressure steam connecting valve consists of two isolation valves and one regulating valve, used for isolation, regulation, and flow control of high-pressure steam mutual supply between the two thermal power units; when the high-pressure main steam valve and the high-pressure main steam regulating valve are separately installed, the connection point of the high-pressure main steam connecting pipe and the main steam header is located between the outlet side of the high-pressure main steam valve and the inlet side of the high-pressure main steam regulating valve. The high-pressure steam connecting valve consists of one regulating valve, used for regulation and flow control of high-pressure steam mutual supply between the two thermal power units. When the intermediate-pressure reheat steam valve and the intermediate-pressure reheat steam regulating valve on the reheat steam header are integrated, the connection between the intermediate-pressure main steam connecting pipe and the reheat steam header is located on the inlet side of the intermediate-pressure main steam valve. The intermediate-pressure steam connecting valve consists of two isolation valves and one regulating valve, used for isolation, regulation, and flow control of the intermediate-pressure reheat steam supply between the two thermal power units. When the intermediate-pressure reheat steam valve and the intermediate-pressure reheat steam regulating valve are separate, the connection between the intermediate-pressure main steam connecting pipe and the reheat steam header is located between the outlet side of the intermediate-pressure main steam valve and the inlet side of the intermediate-pressure main steam regulating valve. The intermediate-pressure steam connecting valve consists of one regulating valve, used for regulation and flow control of the intermediate-pressure reheat steam supply between the two thermal power units. When the low-pressure steam pilot valve and the low-pressure steam pilot regulating valve on the low-pressure steam header are integrated, the connection between the low-pressure main steam connecting pipe and the low-pressure steam header is located on the inlet side of the low-pressure main steam valve. The low-pressure steam connecting valve consists of two isolation valves and one regulating valve, used for isolation, regulation, and flow control of low-pressure steam mutual supply between the two thermal power units. When the low-pressure steam pilot valve and the low-pressure steam pilot regulating valve are separate, the connection between the low-pressure main steam connecting pipe and the low-pressure steam header is located between the outlet side of the low-pressure main steam valve and the inlet side of the low-pressure main steam regulating valve. The low-pressure steam connecting valve consists of one regulating valve, used for regulation and flow control of low-pressure steam mutual supply between the two thermal power units.

[0008] In some modified embodiments of the first aspect of this application, the aforementioned dual thermal power unit-bonded power generation device is provided with a warming mechanism on the high-pressure steam connection pipe, the medium-pressure steam connection pipe and the low-pressure steam connection pipe, which is used to maintain the pipe wall temperature in a warming state when there is no steam flow in the high-pressure steam connection pipe, the medium-pressure steam connection pipe and the low-pressure steam connection pipe.

[0009] In some modified embodiments of the first aspect of this application, the aforementioned dual thermal power unit is bound to a power generation device, and the pipe warming mechanism includes a thermocouple and an electronic heating strap. The thermocouples are installed at both ends and the middle of the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe and the low-pressure steam connecting pipe, and are used to monitor the pipe wall temperature of the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe and the low-pressure steam connecting pipe in real time. The electronic heating strap is laid along the entire length of the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe. It is used to heat the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe according to the preset heating logic and target temperature, so that the pipe wall temperature of the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe is maintained at the target temperature when there is no steam flow, thus achieving a warm-up state.

[0010] In some modified embodiments of the first aspect of this application, the aforementioned dual thermal power unit is bound to a power generation device, and the pipe warming mechanism further includes an insulation layer; The insulation layer is laid along the entire length of the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe to reduce the heat conduction and convection of the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe, so as to work with the electronic heating strap to maintain the pipe wall temperature at the target temperature and achieve the pipe warming state.

[0011] Secondly, this application provides a method for binding two thermal power units together for power generation, applied to the dual thermal power unit binding power generation device described in the first aspect above, the method comprising: Receive the total load instruction from the power grid AGC, which is issued by the power grid dispatch center treating the two thermal power units as a single load unit; Based on the total load command, a target load allocation strategy for the two thermal power units is determined. The target load allocation strategy is used to characterize the strategy of dynamically allocating the operating load between the high-pressure cylinder, intermediate-pressure cylinder and low-pressure cylinder of the two thermal power units based on different load segments. According to the target load distribution strategy, the opening of the high-pressure steam interconnection valve, the medium-pressure steam interconnection valve and the low-pressure steam interconnection valve are controlled to regulate the mutual supply flow of high-pressure steam, medium-pressure reheat steam and low-pressure steam between the two thermal power units. When it is necessary to perform cylinder cutting operation on the high-pressure cylinder or the medium-pressure cylinder, the ventilation valve is controlled to open to maintain the vacuum state of the high-pressure cylinder and the medium-pressure cylinder.

[0012] In some modified embodiments of the second aspect of this application, the aforementioned dual thermal power unit binding power generation method, based on the total load command, determines the target load allocation strategy for the two thermal power units, including: According to the operating load segment corresponding to the total load instruction, the operating load segment includes at least a high load segment, a medium load segment, and a low load segment; If it is the high-load section, the target load allocation strategy is: control both thermal power units to operate at full load, close the high-pressure steam interconnection valve, the medium-pressure steam interconnection valve and the low-pressure steam interconnection valve, and prohibit steam mutual supply. If it is the medium load section, the target load allocation strategy is as follows: control one thermal power unit to operate at full load, and the other thermal power unit to operate at partial load by adjusting the opening of the high-pressure steam interconnection valve, the medium-pressure steam interconnection valve and the low-pressure steam interconnection valve. The opening is dynamically adjusted according to the real-time load deviation. If it is the low-load section, the target load allocation strategy is as follows: control one thermal power unit to operate at partial load, and the high-pressure cylinder or medium-pressure cylinder of the other thermal power unit to perform cylinder cutting operation, and adjust the opening range of the ventilation valve according to the cylinder cutting status of the high-pressure cylinder or medium-pressure cylinder to maintain the vacuum state.

[0013] In some modified embodiments of the second aspect of this application, the aforementioned method for binding two thermal power units for power generation further includes: The pipe wall temperatures of the high-pressure steam connection pipe, medium-pressure steam connection pipe, and low-pressure steam connection pipe are monitored in real time via thermocouples. The pipe wall temperature is compared with the preset target temperatures of the high-pressure steam connection pipe, the medium-pressure steam connection pipe, and the low-pressure steam connection pipe, respectively. If the tube wall temperature is lower than the target temperature, the heating mode of the electronic heating strap is determined based on the temperature difference between the target temperature and the tube wall temperature. The electronic heating strap is controlled to perform the heating operation according to the heating mode, so that the high-pressure steam connection pipe, the medium-pressure steam connection pipe and the low-pressure steam connection pipe are maintained at the target temperature when there is no steam flow, thus achieving the pipe warming state.

[0014] In some modified embodiments of the second aspect of this application, the aforementioned dual thermal power unit bonding power generation method, which determines the heating mode of the electronic heating strap based on the temperature difference between the target temperature and the pipe wall temperature, includes: If the temperature difference exceeds the first temperature difference threshold, then the maximum heating power is used as the heating mode; If the temperature difference exceeds the second temperature difference threshold but does not exceed the first temperature difference threshold, then the standard heating power is used as the heating mode.

[0015] To achieve the above objectives, according to a third aspect of this application, a storage medium is provided, the storage medium including a stored program, wherein, when the program is executed, the device where the storage medium is located is controlled to perform the dual thermal power unit bonding power generation method of the second aspect described above.

[0016] To achieve the above objectives, according to a fourth aspect of this application, a processor is provided for running a program, wherein the program executes the dual thermal power unit bonding power generation method of the second aspect described above.

[0017] Based on the above technical solution, this application provides a dual thermal power unit binding power generation device and method. The device connects the high-pressure cylinder, intermediate-pressure cylinder, and low-pressure cylinder of two thermal power units through a high-pressure steam interconnection pipe, a medium-pressure steam interconnection pipe, and a low-pressure steam interconnection pipe. A connecting valve is installed on the steam interconnection pipe to achieve mutual steam supply. At the same time, a ventilation valve and a condenser vacuuming device are installed to maintain cylinder vacuum when performing cylinder switching operation on the high-pressure cylinder or the intermediate-pressure cylinder to ensure the vacuum state of multiple cylinders operating simultaneously. When the central control unit receives the grid AGC total load command, it dynamically distributes the operating load between the high-pressure cylinder, intermediate-pressure cylinder, and low-pressure cylinder of the two thermal power units based on different load segments to control the two thermal power units to perform power generation operation. This innovative approach physically binds two thermal power units together and integrates steam supply and vacuum control mechanisms, circumventing the limitations imposed by the independent operation of a single thermal power unit. It solves the inefficient operation bottleneck inherent in the existing "one boiler, one turbine" structure of single thermal power units. Simultaneously, it enables the two units to operate collaboratively as a unified power generation system. Steam resources can be dynamically allocated between the two units, ensuring precise matching between steam supply flow and load demand. This improves overall thermal efficiency under low-load conditions, significantly reduces fuel consumption, and keeps the thermal power unit as a whole operating within its high-efficiency power generation range. The entire power generation unit can continue to operate within its high-efficiency range even under low-load conditions, effectively improving the overall power generation efficiency of the thermal power unit.

[0018] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This paper shows a block diagram of a dual thermal power unit bonded power generation device according to an embodiment of this application; Figure 2 A flowchart of a dual thermal power unit bonding power generation method provided in an embodiment of this application is shown; Figure 3 A flowchart of another method for binding two thermal power units for power generation provided in an embodiment of this application is shown. Detailed Implementation

[0020] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the invention, are intended to cover non-exclusive inclusion.

[0022] In the description of the embodiments of this invention, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this invention, "multiple" means two or more, unless otherwise explicitly defined.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] In the description of the embodiments of this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0025] In the description of the embodiments of the present invention, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0026] In the description of the embodiments of the present invention, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0027] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0028] Overview of the Invention's Main Line Currently, existing thermal power units are typically operated independently, generally employing a "one boiler, one turbine" unit configuration. Under this structure, a reduction in unit load directly leads to a significant decrease in the power generation efficiency of the corresponding boiler and turbine, resulting in low overall power generation efficiency for the thermal power unit. Therefore, the rigid coupling structure of "one boiler, one turbine" makes it difficult for a single, independently operating thermal power unit to escape its inefficient operating range, and improvements to optimize the power generation efficiency of a single thermal power unit are limited by its independent operating characteristics.

[0029] To address the aforementioned issues, optimization of the traditional thermal power unit structure is urgently needed. This invention proposes a dual-thermal power unit binding power generation device, employing a "dual-unit bound operation" configuration. This is achieved by adding high-pressure steam interconnection pipes, medium-pressure steam interconnection pipes, and low-pressure steam interconnection pipes to form a dual-unit bound body. This connects the high-pressure, medium-pressure, and low-pressure cylinders of the two thermal power units accordingly. Ventilation valves and condenser vacuum equipment are installed to maintain a vacuum state in multiple cylinders. In essence, the two thermal power units are physically bound together, integrating steam mutual supply and vacuum control mechanisms. The operating status of the two thermal power units can be flexibly scheduled through grid AGC total load commands. Under low-load conditions, the load can be concentrated on one thermal power unit, maintaining its operation within the high-efficiency load range, thereby improving overall power generation efficiency.

[0030] like Figure 1 As shown, Figure 1 This is a schematic diagram of a dual thermal power unit bonding generator provided in this application. It should be noted that... Figure 1The design aims to illustrate the overall system architecture of the unit and the connections between its main functional modules, with a focus on demonstrating the collaborative operation between the two thermal power units, steam interconnection pipes, ventilation valves, and condenser vacuum equipment. The diagram does not show the specific central control unit, which is only a structural framework illustration; however, this does not mean that the actual unit does not contain such a unit.

[0031] like Figure 1 As shown, the present application provides a dual thermal power unit binding power generation device, including two thermal power units, a high-pressure steam connection pipe, a medium-pressure steam connection pipe, a low-pressure steam connection pipe, a ventilation valve, a condenser vacuum equipment, and a central control unit. The high-pressure steam connection pipe, the medium-pressure steam connection pipe, and the low-pressure steam connection pipe are respectively equipped with a high-pressure steam connection valve, a medium-pressure steam connection valve, and a low-pressure steam connection valve.

[0032] Among them, two thermal power units serve as the main power generation entities. Each thermal power unit includes a boiler system, a gas extraction and regeneration system, a steam turbine (high-pressure cylinder, medium-pressure cylinder, and low-pressure cylinder), and a generator, which are used to convert thermal energy into electrical energy.

[0033] High-pressure steam connecting pipe (HP connecting pipe in the figure), medium-pressure steam connecting pipe (IP connecting pipe in the figure), and low-pressure steam connecting pipe (LP connecting pipe in the figure): connect the high-pressure cylinder, medium-pressure cylinder, and low-pressure cylinder of two thermal power units. They are used to achieve mutual steam supply between high-pressure steam systems, medium-pressure reheat steam systems, and low-pressure steam systems, so that high-pressure steam, medium-pressure reheat steam, and low-pressure steam can be dynamically allocated according to load demand.

[0034] High-pressure steam interconnection valve (HP interconnection valve in the figure), medium-pressure steam interconnection valve (P interconnection valve in the figure), and low-pressure steam interconnection valve (LP interconnection valve in the figure): are integrated on the high-pressure steam interconnection pipe, medium-pressure steam interconnection pipe, and low-pressure steam interconnection pipe respectively, and are used to precisely regulate the steam mutual supply flow, realize the isolation, regulation and flow control of steam flow.

[0035] Ventilation valves (including HP ventilation valve 1, HP ventilation valve 2, IP ventilation valve 1 and IP ventilation valve 2 in the figure): are used to open immediately when performing cylinder cutting operation (closing the steam inlet of the high-pressure cylinder or the intermediate-pressure cylinder) to prevent steam retention and sudden negative pressure changes in the cylinder and maintain the cylinder vacuum state; Condenser vacuum equipment: used to maintain the vacuum level of the entire steam turbine system by continuously pumping vacuum when multiple cylinders such as high-pressure cylinder (HP1 and HP2 in the figure), intermediate-pressure cylinder (IP1 and IP2 in the figure), and low-pressure cylinder (LP1 and LP2 in the figure) are running synchronously, so as to ensure stable thermal efficiency.

[0036] Central control unit (not shown in the figure): As the core of the system, it receives the total load command of the grid AGC (for the two thermal power units as a whole), dynamically calculates the target load allocation strategy (such as according to the load segment division), and controls the opening of the interconnection valve, the status of the ventilation valve and the operation of the condenser vacuum equipment to realize the intelligent coordination of the bundled power generation operation.

[0037] Based on the above description, the connection relationships between the components are as follows: The high-pressure steam connection pipe, the medium-pressure steam connection pipe, and the low-pressure steam connection pipe are respectively connected to the high-pressure cylinder, the medium-pressure cylinder, and the low-pressure cylinder of the two thermal power units for mutual steam supply. Ventilation valves are installed at the exhaust ports of the high-pressure cylinder and intermediate-pressure cylinder of the two thermal power units, respectively, to maintain cylinder vacuum when performing cylinder cutting operation on the high-pressure cylinder or intermediate-pressure cylinder; The condenser vacuum equipment is connected to the ventilation valves of the two thermal power units and the low-pressure cylinder of the two thermal power units, and is used to maintain the vacuum state of multiple cylinders in the high-pressure cylinder, intermediate-pressure cylinder and low-pressure cylinder operating at the same time. The central control unit is electrically connected to the two thermal power units, the high-pressure steam interconnection valve, the medium-pressure steam interconnection valve, the low-pressure steam interconnection valve, the ventilation valve, and the condenser vacuum equipment. It is used to receive the total load command of the power grid AGC, determine the target load allocation strategy based on the total load command, and control the two thermal power units to perform power generation operations according to the target load allocation strategy. The target load allocation strategy is used to characterize the strategy of dynamically allocating the operating load between the high-pressure cylinder, medium-pressure cylinder, and low-pressure cylinder of the two thermal power units based on different load segments.

[0038] Specifically, in actual operation, the power grid dispatch center treats the two thermal power units as a single generating unit and issues an AGC total load command for the entire unit. After receiving the AGC total load command, the central control unit calculates the current total load value and divides it into high-load, medium-load, and low-load segments. Based on different load segments, a target allocation strategy is generated. In the high-load segment: all interconnection valves are closed, both units operate at full load, and steam mutual supply is prohibited; in the medium-load segment: one unit operates at full load, and the other unit receives steam by adjusting the opening of the corresponding interconnection valve to achieve partial load operation; in the low-load segment: one unit operates at partial load, and the other unit performs cylinder cut-off operation (such as closing the high-pressure cylinder steam inlet), while controlling the ventilation valve to open to maintain cylinder vacuum. By adjusting the opening of the high-pressure, medium-pressure, or low-pressure steam interconnection valve, the steam mutual supply flow is dynamically controlled. During cylinder cut-off operation, the corresponding ventilation valve opens immediately to prevent cylinder vacuum from being broken, and the condenser vacuum pump operates synchronously to ensure that the vacuum state of the high-pressure, medium-pressure, and low-pressure cylinders is consistent.

[0039] Furthermore, such as Figure 1As shown, the high-pressure steam connecting pipe (HP connecting pipe in the figure) is connected at both ends to the main steam headers of the two thermal power units, respectively, for the mutual supply of high-pressure steam between the two thermal power units. The main steam header is located between the boiler outlet and the high-pressure cylinder inlet. The medium-pressure steam connecting pipe (IP connecting pipe in the figure) is connected at both ends to the reheat steam headers of the two thermal power units, respectively, for the mutual supply of medium-pressure reheat steam between the two thermal power units. The reheat steam header is located between the reheater outlet and the medium-pressure cylinder inlet. The low-pressure steam connecting pipe (LP connecting pipe in the figure) is connected at both ends to the low-pressure steam headers of the two thermal power units. The low-pressure steam header is used to achieve low-pressure steam mutual supply between two thermal power units. The low-pressure steam header is located between the exhaust port of the intermediate-pressure cylinder and the inlet port of the low-pressure cylinder. The high-pressure steam connecting pipe (HP connecting pipe in the figure), the intermediate-pressure steam connecting pipe (IP connecting pipe in the figure), and the low-pressure steam connecting pipe (LP connecting pipe in the figure) are respectively equipped with high-pressure steam connecting valves (not shown in the figure), intermediate-pressure steam connecting valves (not shown in the figure), and low-pressure steam connecting valves (not shown in the figure) to control the regulation and flow control of steam mutual supply between the high-pressure cylinder, intermediate-pressure cylinder, and low-pressure cylinder of the two thermal power units.

[0040] Specifically, by connecting three interconnecting pipes to key nodes of the corresponding steam systems—the main steam header, the reheat steam header, and the low-pressure steam header—the two thermal power units can dynamically supply high-pressure steam, medium-pressure reheat steam, and low-pressure steam to each other under different load conditions, avoiding resource waste caused by steam matching imbalances in traditional single-unit operation. For example, under medium load conditions, the high-pressure steam from one thermal power unit can be directly supplied to the medium-pressure cylinder of another thermal power unit without the need to start the boiler, reducing fuel consumption by more than 15%. Under low load conditions, the low-pressure exhaust steam from one thermal power unit can be supplied to the low-pressure cylinder of another thermal power unit, avoiding steam overflow losses. The three independent interconnecting pipe design avoids mutual interference between steam systems, enabling the thermal power units to maintain stable operation during load fluctuations (such as rapid changes in AGC commands), reducing the risk of unplanned shutdowns.

[0041] Furthermore, when the high-pressure main steam valve and the high-pressure main steam regulating valve on the main steam header are integrated, the connection between the high-pressure main steam connecting pipe and the main steam header is located on the inlet side of the high-pressure main steam valve. The high-pressure steam connecting valve consists of two isolation valves and one regulating valve, used for isolation, regulation, and flow control of high-pressure steam supply between the two thermal power units. When the high-pressure main steam valve and the high-pressure main steam regulating valve are separate, the connection between the high-pressure main steam connecting pipe and the main steam header is located between the outlet side of the high-pressure main steam valve and the inlet side of the high-pressure main steam regulating valve. The high-pressure steam connecting valve consists of one regulating valve, used for regulation and flow control of high-pressure steam supply between the two thermal power units. When the intermediate-pressure reheat steam valve and the intermediate-pressure reheat steam regulating valve on the reheat steam header are integrated, the connection between the intermediate-pressure main steam connecting pipe and the reheat steam header is located on the inlet side of the intermediate-pressure main steam valve. The intermediate-pressure steam connecting valve consists of two isolation valves and one regulating valve, used for the isolation, regulation, and flow control of the intermediate-pressure reheat steam supply between the two thermal power units. When the intermediate-pressure reheat steam valve and the intermediate-pressure reheat steam regulating valve are separate, the connection between the intermediate-pressure main steam connecting pipe and the reheat steam header is located between the outlet side of the intermediate-pressure main steam valve and the inlet side of the intermediate-pressure main steam regulating valve. The intermediate-pressure steam connecting valve consists of one regulating valve, used for the regulation and flow control of the intermediate-pressure reheat steam supply between the two thermal power units. When the low-pressure steam pilot valve and the low-pressure steam pilot regulating valve on the low-pressure steam header are integrated, the connection between the low-pressure main steam connecting pipe and the low-pressure steam header is located on the inlet side of the low-pressure main steam valve. The low-pressure steam connecting valve consists of two isolation valves and one regulating valve, used for isolation, regulation, and flow control of low-pressure steam mutual supply between the two thermal power units. When the low-pressure steam pilot valve and the low-pressure steam pilot regulating valve are separate, the connection between the low-pressure main steam connecting pipe and the low-pressure steam header is located between the outlet side of the low-pressure main steam valve and the inlet side of the low-pressure main steam regulating valve. The low-pressure steam connecting valve consists of one regulating valve, used for regulation and flow control of low-pressure steam mutual supply between the two thermal power units.

[0042] Specifically, in the integrated configuration, two isolation valves ensure complete isolation of steam supply, while a single regulating valve enables precise flow control. In the separate configuration, a single regulating valve simplifies the control logic and reduces system complexity. This integrated or separate valve configuration can adapt to different thermal power unit designs, avoiding steam supply failures due to differences in valve structure. Furthermore, this standardized design reduces the types of spare parts, shortens maintenance time, and prevents steam supply interruptions due to valve failure, ultimately lowering overall maintenance costs.

[0043] Furthermore, such as Figure 1As shown, warming mechanisms are installed on the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe to maintain the pipe wall temperature in a warm state when there is no steam flow. The warming mechanism includes thermocouples and electronic heating straps. The thermocouples are installed at both ends and the middle of the high-pressure, medium-pressure, and low-pressure steam connecting pipes to monitor the pipe wall temperature in real time. The electronic heating straps run along the entire length of the high-pressure, medium-pressure, and low-pressure steam connecting pipes. The system is designed to heat the high-pressure steam connection pipe, medium-pressure steam connection pipe, and low-pressure steam connection pipe according to a preset heating logic and target temperature. This ensures that the pipe wall temperature of the high-pressure steam connection pipe, medium-pressure steam connection pipe, and low-pressure steam connection pipe remains at the target temperature even when there is no steam flow, thus achieving a warm-up state. The warm-up mechanism also includes an insulation layer. The insulation layer is laid along the entire length of the high-pressure steam connection pipe, medium-pressure steam connection pipe, and low-pressure steam connection pipe to reduce heat conduction and convection in the high-pressure steam connection pipe, medium-pressure steam connection pipe, and low-pressure steam connection pipe. This, in conjunction with the electronic heating straps, helps maintain the pipe wall temperature at the target temperature, achieving a warm-up state.

[0044] Specifically, both the thermocouple and the electronic heating strap are electrically connected to the central control unit.

[0045] Thermocouples can be installed at both ends (near the unit connection) and the middle section (midpoint of each section of the connecting pipe) of the high-pressure, medium-pressure, and low-pressure steam connecting pipes, forming a "three-point" temperature monitoring network. Alternatively, multiple thermocouples can be installed at equal intervals according to the length of the connecting pipe to ensure full temperature coverage. Thermocouples collect pipe wall temperature data in real time and transmit the data to the central control unit.

[0046] Electronic heating straps are tightly laid along the entire length of the high-pressure, medium-pressure, and low-pressure steam connecting pipes. Made of flexible silicone, they are high-temperature resistant and provide safe insulation. The central control unit executes a dynamic PID heating strategy based on thermocouple pipe wall temperature data. Target temperatures for warming up the pipes can be set separately for the high-pressure, medium-pressure, and low-pressure steam connecting pipes. The pipe wall temperature is compared to the target temperature, and the heating mode is determined based on the temperature difference. Heating modes can be categorized by heating power, such as standard heating power or maximum heating power, and can be selected based on the magnitude of the temperature difference or heating aging requirements. When both units are under low load or shut down (no steam flow), the central control unit automatically activates the warming mechanism. It can also be linked with ventilation valves and condenser vacuum equipment: after cylinder cut-off, the warming mechanism starts synchronously to ensure stable connecting pipe temperature during vacuum maintenance.

[0047] The insulation layer can adopt a double-layer composite structure. For example, the inner layer is a nanoporous insulation material, and the outer layer is an aluminum silicate fiber felt. It is also laid seamlessly along the entire length of the connecting pipe. For high-pressure or medium-pressure steam connecting pipes, the thickness can be 15mm, and for low-pressure steam connecting pipes, the thickness can be 10mm. It is fixed with clamps to avoid thermal bridging. The inner layer blocks heat conduction, and the outer layer inhibits heat convection, reducing the heat exchange rate between the pipe wall and the environment to 1 / 5 of that of traditional insulation layers. At the same time, it forms a dual insulation structure with the electronic heating straps, where electronic heating provides dynamic compensation and the insulation layer reduces basic heat loss.

[0048] For example, taking two 1000MW rated thermal power units (Unit 1 and Unit 2) as an example, the collaborative control logic of this application in actual operation is illustrated. The power grid dispatch center treats the two units as a single power generation unit and issues an AGC total load command (e.g., a total load of 1500MW). The central control unit dynamically allocates the load based on the command, driving steam mutual supply, vacuum maintenance, and warm-up control to achieve closed-loop collaboration. The specific operation is as follows: When operating at high load (total load 1700MW, 170% of rated capacity): AGC command input: The power grid dispatch center issues a total load command of 1700MW (both generating units as a whole). Central control unit strategy: Identify the load segment as a high-load segment (greater than or equal to 80%) and determine the target load allocation strategy: Both units operate at full load, and steam mutual supply is prohibited. Close all interconnection valves (high-pressure steam interconnection valve, medium-pressure steam interconnection valve, low-pressure steam interconnection valve) to ensure that the high-pressure, medium-pressure, and low-pressure steam systems operate independently.

[0049] Execution process: Unit 1 and Unit 2 operate synchronously at full load (850MW each). Figure 1 For example, HP interconnection valve, IP interconnection valve, and LP interconnection valve are all closed. Main steam valve 1, main steam valve 2, reheat steam valve 1, reheat steam valve 2, LP pilot steam valve 1, and LP pilot steam valve 2 are all open. HP vent valve 1, HP vent valve 2, IP vent valve 1, and IP vent valve 2 are all closed, and the condenser vacuum equipment maintains a basic vacuum (-90 kPa). There is no steam flow in the three steam interconnection pipes, and the pipe warming mechanism maintains the pipe wall temperature at 90°C.

[0050] When operating at medium load (total load 1500MW, 150% rated capacity): AGC command input: Total load command 1500MW.

[0051] Central control unit strategy: Identify the load segment as a medium load segment (50%-80%) and determine the target load allocation strategy: one unit operates at full load, while the other achieves partial load through low-pressure steam interconnection valve adjustment. Figure 1For example, the HP interconnection valve and IP interconnection valve are closed, while the LP interconnection valve is open. Main steam valve 1, main steam valve 2, reheat steam valve 1, reheat steam valve 2, LP pilot steam valve 1, and LP pilot steam valve 2 are all open. HP vent valve 1, HP vent valve 2, IP vent valve 1, and IP vent valve 2 are all closed. Unit 1 operates at full load (1000MW), and Unit 2 operates at partial load (500MW); the low-pressure steam interconnection valve opening is set to 50%.

[0052] Execution process: The low-pressure exhaust steam of Unit 1 is supplied to the low-pressure cylinder of Unit 2 through the low-pressure steam connection pipe (including the low-pressure steam connection valve); the high-pressure steam connection valve and the medium-pressure steam connection valve are closed to prevent the mutual supply of high-pressure and medium-pressure steam; the ventilation valve is closed and the vacuum equipment of the condenser is used to maintain the vacuum; the warm-up mechanism monitors the temperature of the low-pressure steam connection pipe in real time. If it is lower than 90°C, the electronic heating straps heat at the standard heating power.

[0053] When operating at low load (total load 1200MW, 120% rated capacity): AGC command input: Total load command 1200MW.

[0054] Central control unit strategy: Identify load segments as low-load segments (less than or equal to 50%) and determine the target load allocation strategy: One unit maintains high-pressure / medium-pressure cylinder operation, while the other gradually switches cylinders to lower loads. Figure 1 For example, the HP and IP interconnection valves are closed, while the LP interconnection valve is open. Main steam valve 1, reheat steam valve 1, LP pilot steam valve, and LP pilot steam valve 2 are all open; main steam valve 2 and reheat steam valve 2 are both closed; HP ventilation valve 1 and IP ventilation valve 1 are both closed; HP ventilation valve 2 and IP ventilation valve 2 are both open. Unit 1 operates at 850MW (high-pressure and intermediate-pressure cylinders at full load, low-pressure cylinder at partial load); Unit 2 performs cylinder cut-off: high-pressure cylinder cut-off: high-pressure ventilation valve opens to maintain high-pressure cylinder vacuum; intermediate-pressure cylinder cut-off: intermediate-pressure ventilation valve opens to maintain intermediate-pressure cylinder vacuum; only low-pressure cylinder cooling steam is retained (triggered at a total load of 1100MW, currently approaching 1200MW): low-pressure steam interconnection valve opening is 100%, and the low-pressure exhaust steam from Unit 1 supplies the low-pressure cylinder cooling flow of Unit 2.

[0055] Execution process: The exhaust vent valve of the high-pressure cylinder in Unit 2 opens, and the vacuum of the high-pressure cylinder is maintained immediately; the exhaust vent valve of the intermediate-pressure cylinder in Unit 2 opens, and the vacuum of the intermediate-pressure cylinder is maintained immediately; the vacuum equipment for the condenser operates synchronously to ensure that the vacuum levels of the high-pressure, intermediate-pressure, and low-pressure cylinders are consistent (-90 kPa); the warm-up mechanism monitors the temperature of the low-pressure steam connecting pipe, and if it drops to 85°C (target temperature is 90°C), the electronic heating straps heat at maximum power. When operating at deep peak load (total load 200MW, 20% of rated capacity): AGC command input: Total load command 200MW.

[0056] Central control unit strategy: Identify the load segment as a low-load segment and determine the target load allocation strategy: Both units operate at partial load, but unit 2 has been completely de-energized. Figure 1 For example, the HP and IP interconnection valves are closed, while the LP interconnection valve is open. Main steam valve 1, reheat steam valve 1, LP pilot steam valve, and LP pilot steam valve 2 are all open; main steam valve 2 and reheat steam valve 2 are both closed; HP vent valve 1 and IP vent valve 1 are both closed; HP vent valve 2 and IP vent valve 2 are both open. Unit 1 operates at 200MW (only the low-pressure cylinder operates, retaining cooling steam); Unit 2 operates at 0MW (the high-pressure, intermediate-pressure, and low-pressure cylinders are all disconnected, receiving cooling steam only through the low-pressure steam interconnection valve). The low-pressure steam interconnection valve is 100% open, and all low-pressure exhaust steam from Unit 1 is supplied to the low-pressure cylinder of Unit 2 for cooling.

[0057] Execution process: The exhaust valves of the high-pressure cylinder and intermediate-pressure cylinder of Unit 1 are opened (to maintain vacuum); the low-pressure cylinder of Unit 2 maintains the cooling steam flow (to avoid overheating); the vacuum equipment of the condenser is operated; the warm-up mechanism maintains the temperature of the low-pressure steam connecting pipe at 90℃.

[0058] During the load increase process (from 200MW to 1700MW): AGC command input: Total load command gradually increased from 200MW to 1700MW.

[0059] Central control unit strategy: Units are restored gradually in reverse order: Total load 1100MW: Unit 2 resumes low-pressure cylinder operation; Total load 1400MW: Unit 2 resumes intermediate-pressure cylinder operation, and IP ventilation valve 2 is closed; Total load 1600MW: Unit 2 resumes high-pressure cylinder operation, and HP ventilation valve 2 is closed; Total load 1700MW: Both units operate at full load, and all ventilation valves are closed. When increasing load, priority is given to increasing the combustion intensity of the unit with poor combustion (such as Unit 2).

[0060] Execution process: In each step, the ventilation valve is closed as needed, and the opening of the connecting valve is dynamically adjusted; the heating mechanism adjusts the heating mode according to temperature changes (such as activating maximum power when the temperature difference is >5℃).

[0061] It should be noted that this diagram does not show the detailed internal structure of the condenser system, extraction steam regeneration system, and extraction steam pipelines. Instead, it uses text labels and schematic arrows to generally represent their steam extraction relationships with each turbine generator unit. Furthermore, due to limitations in the diagram's representation, although the exhaust ends of the high-pressure cylinders (HP1 and HP2 in the diagram), intermediate-pressure cylinders (IP1 and IP2 in the diagram), and low-pressure cylinders (LP1 and LP2 in the diagram) of the two thermal power units are also equipped with extraction steam pipelines connected to the extraction steam regeneration system, and the warm-up mechanism is directly laid on the high-pressure, intermediate-pressure, and low-pressure steam connecting pipes, these are not shown in this diagram. However, it should be understood that this does not mean that these connections do not exist in the actual system; all extraction steam passages are physically and structurally complete.

[0062] Based on the above Figure 1 As can be seen, the dual thermal power unit binding power generation device provided in this application innovatively physically binds two thermal power units and integrates steam mutual supply and vacuum control mechanisms, avoiding the limitations of independent operation characteristics of a single thermal power unit. It solves the inefficient operation bottleneck that the existing "one boiler, one machine" structure of a single thermal power unit cannot overcome. At the same time, it enables the two units to operate collaboratively as a unified power generation system. Steam resources can be dynamically allocated between the two thermal power units, so that the steam mutual supply flow is precisely matched with the load demand, improving the overall thermal efficiency under low load conditions, significantly reducing fuel consumption, and keeping the thermal power units as a whole in the high-efficiency power generation range. The entire power generation device can continue to operate in the high-efficiency range under low load conditions, effectively improving the overall power generation efficiency of the thermal power units.

[0063] Furthermore, this application provides a method for binding two thermal power units together for power generation, applied to the aforementioned dual thermal power unit binding power generation device. This method can improve the overall power generation efficiency of the thermal power units. The specific execution steps are as follows: Figure 1 As shown, it includes: 101. Receive the total load command of the power grid AGC.

[0064] Among them, the total load instruction is issued by the power grid dispatch center as a whole load for the two thermal power units.

[0065] 102. Based on the total load command, determine the target load allocation strategy for the two thermal power units.

[0066] Among them, the target load allocation strategy is used to characterize the strategy of dynamically allocating the operating load between the high-pressure cylinder, intermediate-pressure cylinder and low-pressure cylinder of two thermal power units based on different load sections.

[0067] Specifically, based on the operating load segment corresponding to the total load command, the operating load segment includes at least a high-load segment, a medium-load segment, and a low-load segment. If it is a high-load segment, the target load allocation strategy is as follows: control both thermal power units to operate at full load, close the high-pressure steam interconnection valve, the medium-pressure steam interconnection valve, and the low-pressure steam interconnection valve, and prohibit steam mutual supply. If it is a medium-load segment, the target load allocation strategy is as follows: control one thermal power unit to operate at full load, and the other thermal power unit to achieve partial load operation by adjusting the opening degree of the high-pressure steam interconnection valve, the medium-pressure steam interconnection valve, and the low-pressure steam interconnection valve. If it is a low-load segment, the target load allocation strategy is as follows: control one thermal power unit to operate at partial load, and the high-pressure cylinder or the medium-pressure cylinder of the other thermal power unit to perform cylinder cutting operation, and adjust the opening degree of the ventilation valve according to the cylinder cutting status of the high-pressure cylinder or the medium-pressure cylinder to maintain the vacuum state.

[0068] In this step, the opening degree of the high-pressure steam interconnection valve, the medium-pressure steam interconnection valve, and the low-pressure steam interconnection valve can be dynamically adjusted according to the real-time load deviation.

[0069] 103. According to the target load distribution strategy, control the opening of the high-pressure steam interconnection valve, the medium-pressure steam interconnection valve and the low-pressure steam interconnection valve to regulate the mutual supply flow of high-pressure steam, medium-pressure reheat steam and low-pressure steam between the two thermal power units, and control the ventilation valve to open when it is necessary to perform cylinder cutting operation on the high-pressure cylinder or the medium-pressure cylinder to maintain the vacuum state of the high-pressure cylinder and the medium-pressure cylinder.

[0070] Based on the above Figure 2 It can be seen that by processing the total load command of the power grid AGC based on the overall load of the two thermal power units, a fundamental breakthrough in operating logic has been achieved. This avoids the load distribution imbalance problem caused by the dispersed total load command in traditional single-unit operation. The central control unit dynamically divides the load segments based on the total load command, precisely controlling steam mutual supply and vacuum maintenance, thus upgrading the two thermal power units from independent operation to an organically coordinated whole. This improves thermal efficiency under low-load conditions, shortens the response time of AGC commands, and the overall energy efficiency far exceeds that of single-unit operation, completely solving the inefficient operation bottleneck that the rigid coupling structure of "one boiler, one unit" prevents from being overcome by a single independently operating thermal power unit.

[0071] Furthermore, the preferred embodiments of this application are based on the above... Figure 2 Based on this, a warming mechanism is added to the high-pressure, medium-pressure, and low-pressure steam interconnection pipes in the aforementioned dual-thermal-power unit bundled power generation device. This warming mechanism is electrically connected to the central control unit and specifically includes thermocouples, electronic heating straps, and an insulation layer. A detailed description of the warming process of the warming mechanism in the dual-thermal-power unit bundled power generation method is provided, with the specific steps as follows: Figure 3 As shown, it includes: 201. Monitor the pipe wall temperature of the high-pressure steam connection pipe, medium-pressure steam connection pipe and low-pressure steam connection pipe in real time via thermocouples.

[0072] 202. Compare the pipe wall temperature with the preset target temperatures of the high-pressure steam connection pipe, the medium-pressure steam connection pipe, and the low-pressure steam connection pipe, respectively.

[0073] In this step, the target temperature can be between 85 and 95°C. For example, 90°C.

[0074] 203. If the pipe wall temperature is lower than the target temperature, the heating mode of the electronic heating strap shall be determined according to the temperature difference between the target temperature and the pipe wall temperature.

[0075] Specifically, if the temperature difference exceeds the first temperature difference threshold, the maximum heating power is used as the heating mode; if the temperature difference exceeds the second temperature difference threshold but does not exceed the first temperature difference threshold, the standard heating power is used as the heating mode.

[0076] In this step, the first temperature difference threshold is much larger than the second temperature difference threshold. For example, the first temperature threshold can be 20℃, and the second temperature threshold can be 10℃. The standard heating power is less than the maximum heating power. When the temperature difference is small, a relatively lower standard heating power can be used as the heating mode to save energy. When the temperature difference is large, a relatively higher maximum heating power can be used as the heating mode to quickly warm up the pipes. This maximum heating power can be customized with reference to the standard heating power.

[0077] 204. Control the electronic heating straps to perform heating operations according to the heating mode, so that the high-pressure steam connection pipe, medium-pressure steam connection pipe and low-pressure steam connection pipe maintain the target temperature when there is no steam flow, and achieve the pipe warming state.

[0078] Based on the above Figure 3 It can be seen that the synergistic warming mechanism composed of thermocouples, electronic heating straps and insulation layers can stably maintain the pipe wall temperature of the steam connection pipe in a warming state when there is no steam flow. This completely eliminates the problems of condensate accumulation and corrosion caused by traditional static insulation, and upgrades the warming technology from passive insulation to active synergistic control, providing key guarantees for the reliability of steam supply.

[0079] Furthermore, embodiments of this application also provide a storage medium for storing a computer program, wherein the computer program, when running, controls the device where the storage medium is located to execute the above-described... Figure 2-3 The method for generating electricity by binding two thermal power units as described in the article.

[0080] Furthermore, embodiments of this application also provide a processor for running a program, wherein the program executes the above-described... Figure 2-3The method for generating electricity by binding two thermal power units as described above. In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0081] It is understood that the relevant features in the above methods and apparatus can be referenced interchangeably. Furthermore, the terms "first," "second," etc., in the above embodiments are used to distinguish between embodiments and do not represent the superiority or inferiority of any particular embodiment.

[0082] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0083] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems can also be used in conjunction with the teachings herein. The required structure for constructing such systems is apparent from the above description. Furthermore, this application is not directed to any particular programming language. It should be understood that the content of this application described herein can be implemented using various programming languages, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of this application.

[0084] In addition, the memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0085] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application 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.

[0086] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. 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, generate instructions for implementing the flowchart... Figure 1One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0087] 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.

[0088] 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 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0089] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0090] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0091] 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 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.

[0092] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0093] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application 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.

[0094] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A dual thermal power unit bonded power generation device, characterized in that, The device includes: Two thermal power units, a high-pressure steam connection pipe, a medium-pressure steam connection pipe, a low-pressure steam connection pipe, ventilation valves, a condenser vacuum pumping device, and a central control unit. The high-pressure steam connection pipe, the medium-pressure steam connection pipe, and the low-pressure steam connection pipe are respectively equipped with high-pressure steam connection valves, medium-pressure steam connection valves, and low-pressure steam connection valves. The high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe are respectively connected to the high-pressure cylinder, the medium-pressure cylinder, and the low-pressure cylinder of the two thermal power units for mutual steam supply. The ventilation valves are respectively installed at the exhaust ports of the high-pressure cylinder and the intermediate-pressure cylinder of the two thermal power units, and are used to maintain the cylinder vacuum when performing cylinder cutting operation on the high-pressure cylinder or the intermediate-pressure cylinder. The condenser vacuum equipment is connected to the ventilation valves of the two thermal power units and the low-pressure cylinders of the two thermal power units, and is used to maintain the vacuum state in which multiple cylinders in the high-pressure cylinder, intermediate-pressure cylinder and low-pressure cylinder operate simultaneously. The central control unit is electrically connected to the two thermal power units, the high-pressure steam interconnection valve, the medium-pressure steam interconnection valve, the low-pressure steam interconnection valve, the ventilation valve, and the condenser vacuum equipment, respectively. It is used to receive the total load command of the power grid AGC, determine the target load allocation strategy based on the total load command, and control the two thermal power units to perform power generation operations according to the target load allocation strategy. The target load allocation strategy is used to characterize the strategy of dynamically allocating the operating load between the high-pressure cylinder, medium-pressure cylinder, and low-pressure cylinder of the two thermal power units based on different load segments.

2. The apparatus according to claim 1, characterized in that, The two ends of the high-pressure steam connecting pipe are respectively connected to the main steam headers of the two thermal power units, which are used to realize the mutual supply of high-pressure steam between the two thermal power units. The main steam header is located between the boiler outlet and the high-pressure cylinder steam inlet. The two ends of the medium-pressure steam connecting pipe are respectively connected to the reheat steam header of the two thermal power units, which is used to realize the mutual supply of medium-pressure reheat steam between the two thermal power units. The reheat steam header is located between the reheater outlet and the medium-pressure cylinder inlet. The two ends of the low-pressure steam connecting pipe are respectively connected to the low-pressure steam headers of the two thermal power units, which are used to realize the mutual supply of low-pressure steam between the two thermal power units. The low-pressure steam header is located between the exhaust port of the intermediate-pressure cylinder and the inlet port of the low-pressure cylinder. The high-pressure steam connection pipe, the medium-pressure steam connection pipe, and the low-pressure steam connection pipe are respectively equipped with high-pressure steam connection valves, medium-pressure steam connection valves, and low-pressure steam connection valves. The high-pressure steam connection valves, medium-pressure steam connection valves, and low-pressure steam connection valves are used to regulate and control the steam supply between the high-pressure cylinder, medium-pressure cylinder, and low-pressure cylinder of the two thermal power units.

3. The apparatus according to claim 2, characterized in that, When the high-pressure main steam valve and the high-pressure main steam regulating valve on the main steam header are integrated, the connection point between the high-pressure main steam connecting pipe and the main steam header is located on the inlet side of the high-pressure main steam valve. The high-pressure steam connecting valve consists of two isolation valves and one regulating valve, used for isolation, regulation, and flow control of high-pressure steam mutual supply between the two thermal power units. When the high-pressure main steam valve and the high-pressure main steam regulating valve are separate, the connection point between the high-pressure main steam connecting pipe and the main steam header is located between the outlet side of the high-pressure main steam valve and the inlet side of the high-pressure main steam regulating valve. The high-pressure steam connecting valve consists of one regulating valve, used for regulation and flow control of high-pressure steam mutual supply between the two thermal power units. When the intermediate-pressure reheat steam valve and the intermediate-pressure reheat steam regulating valve on the reheat steam header are integrated, the connection between the intermediate-pressure main steam connecting pipe and the reheat steam header is located on the inlet side of the intermediate-pressure main steam valve. The intermediate-pressure steam connecting valve consists of two isolation valves and one regulating valve, used for isolation, regulation, and flow control of the intermediate-pressure reheat steam supply between the two thermal power units. When the intermediate-pressure reheat steam valve and the intermediate-pressure reheat steam regulating valve are separate, the connection between the intermediate-pressure main steam connecting pipe and the reheat steam header is located between the outlet side of the intermediate-pressure main steam valve and the inlet side of the intermediate-pressure main steam regulating valve. The intermediate-pressure steam connecting valve consists of one regulating valve, used for regulation and flow control of the intermediate-pressure reheat steam supply between the two thermal power units. When the low-pressure steam pilot valve and the low-pressure steam pilot regulating valve on the low-pressure steam header are integrated, the connection between the low-pressure main steam connecting pipe and the low-pressure steam header is located on the inlet side of the low-pressure main steam valve. The low-pressure steam connecting valve consists of two isolation valves and one regulating valve, used for isolation, regulation, and flow control of low-pressure steam mutual supply between the two thermal power units. When the low-pressure steam pilot valve and the low-pressure steam pilot regulating valve are separate, the connection between the low-pressure main steam connecting pipe and the low-pressure steam header is located between the outlet side of the low-pressure main steam valve and the inlet side of the low-pressure main steam regulating valve. The low-pressure steam connecting valve consists of one regulating valve, used for regulation and flow control of low-pressure steam mutual supply between the two thermal power units.

4. The apparatus according to any one of claims 1-3, characterized in that, Each of the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe is equipped with a pipe warming mechanism to maintain the pipe wall temperature in a warm state when there is no steam flow in the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe.

5. The apparatus according to claim 4, characterized in that, The heating pipe mechanism includes a thermocouple and an electronic heating strap; The thermocouples are installed at both ends and the middle of the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe and the low-pressure steam connecting pipe, and are used to monitor the pipe wall temperature of the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe and the low-pressure steam connecting pipe in real time. The electronic heating strap is laid along the entire length of the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe. It is used to heat the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe according to the preset heating logic and target temperature, so that the pipe wall temperature of the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe is maintained at the target temperature when there is no steam flow, thus achieving a warm-up state.

6. The apparatus according to claim 5, characterized in that, The heating pipe mechanism also includes an insulation layer; The insulation layer is laid along the entire length of the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe to reduce the heat conduction and convection of the high-pressure steam connecting pipe, the medium-pressure steam connecting pipe, and the low-pressure steam connecting pipe, so as to work with the electronic heating strap to maintain the pipe wall temperature at the target temperature and achieve the pipe warming state.

7. A method for operating and controlling dual thermal power units in a combined power generation system, applied to the dual thermal power unit combined power generation device described in any one of claims 1-6, characterized in that, The method includes: Receive the total load instruction from the power grid AGC, which is issued by the power grid dispatch center treating the two thermal power units as a single load unit; Based on the total load command, a target load allocation strategy for the two thermal power units is determined. The target load allocation strategy is used to characterize the strategy of dynamically allocating the operating load between the high-pressure cylinder, intermediate-pressure cylinder and low-pressure cylinder of the two thermal power units based on different load segments. According to the target load distribution strategy, the opening of the high-pressure steam interconnection valve, the medium-pressure steam interconnection valve and the low-pressure steam interconnection valve are controlled to regulate the mutual supply flow of high-pressure steam, medium-pressure reheat steam and low-pressure steam between the two thermal power units. When it is necessary to perform cylinder cutting operation on the high-pressure cylinder or the medium-pressure cylinder, the ventilation valve is controlled to open to maintain the vacuum state of the high-pressure cylinder and the medium-pressure cylinder.

8. The method according to claim 7, characterized in that, Based on the total load command, the target load allocation strategy for the two thermal power units is determined, including: According to the operating load segment corresponding to the total load instruction, the operating load segment includes at least a high load segment, a medium load segment, and a low load segment; If it is the high-load section, the target load allocation strategy is: control both thermal power units to operate at full load, close the high-pressure steam interconnection valve, the medium-pressure steam interconnection valve and the low-pressure steam interconnection valve, and prohibit steam mutual supply. If it is the medium load section, the target load allocation strategy is as follows: control one thermal power unit to operate at full load, and the other thermal power unit to operate at partial load by adjusting the opening of the high-pressure steam interconnection valve, the medium-pressure steam interconnection valve and the low-pressure steam interconnection valve. The opening is dynamically adjusted according to the real-time load deviation. If it is the low-load section, the target load allocation strategy is as follows: control one thermal power unit to operate at partial load, and the high-pressure cylinder or medium-pressure cylinder of the other thermal power unit to perform cylinder cutting operation, and adjust the opening range of the ventilation valve according to the cylinder cutting status of the high-pressure cylinder or medium-pressure cylinder to maintain the vacuum state.

9. The method according to claim 7, characterized in that, The method further includes: The pipe wall temperatures of the high-pressure steam connection pipe, medium-pressure steam connection pipe, and low-pressure steam connection pipe are monitored in real time via thermocouples. The pipe wall temperature is compared with the preset target temperatures of the high-pressure steam connection pipe, the medium-pressure steam connection pipe, and the low-pressure steam connection pipe, respectively. If the tube wall temperature is lower than the target temperature, the heating mode of the electronic heating strap is determined based on the temperature difference between the target temperature and the tube wall temperature. The electronic heating strap is controlled to perform the heating operation according to the heating mode, so that the high-pressure steam connection pipe, the medium-pressure steam connection pipe and the low-pressure steam connection pipe are maintained at the target temperature when there is no steam flow, thus achieving the pipe warming state.

10. The method according to claim 9, characterized in that, The heating mode of the electronic heating strap is determined based on the temperature difference between the target temperature and the tube wall temperature, including: If the temperature difference exceeds the first temperature difference threshold, then the maximum heating power is used as the heating mode; If the temperature difference exceeds the second temperature difference threshold but does not exceed the first temperature difference threshold, then the standard heating power is used as the heating mode.

11. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the dual thermal power unit bonding power generation method as described in any one of claims 7 to 10.

12. A processor, characterized in that, The processor is used to run a program, wherein the program executes the dual thermal power unit binding power generation method as described in any one of claims 7 to 10.

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