A condensate frequency modulation method, device, equipment and medium

Abstract

The present application discloses a condensate frequency modulation method, device, equipment and medium, and relates to the technical field of condensate frequency modulation. The present application is applied to a frequency modulation system, and the frequency modulation system includes a hot water tank, a deaerator and a heating component interconnected by pipelines; the method includes: when the frequency modulation system meets a first preset frequency modulation condition, controlling the frequency modulation system to store the steam drain cooled by the heating component or the condensate heated in the hot water tank; when the frequency modulation system meets a second preset frequency modulation condition, controlling the frequency modulation system to transport the drain stored in the hot water tank to the deaerator. Through the above technical scheme, the present application can more reasonably optimize the traditional frequency modulation system, increase the duration of condensate frequency modulation, reuse the energy of the drain, and thus make better use of the drain.

Description

Technical Field

[0001] The present application relates to the technical field of condensate water frequency modulation, and in particular to a condensate water frequency modulation method, device, equipment and medium. Background Art

[0002] With the implementation of the dual carbon goals, the installed capacity of new energy sources such as wind power, photovoltaic power and hydropower in my country has increased rapidly. Due to the instability of new energy, it has brought challenges to power supply and security. Condensate throttling and frequency modulation technology is to control the water level of the condenser and deaerator within a safe range when the unit load changes, and indirectly change the steam extraction volume by changing the condensate volume in a short time, thereby changing the work of the steam turbine in a short time and increasing the response speed of the unit load to the power grid.

[0003] However, when the condensate frequency modulation technology is used in the prior art, the condensate frequency modulation time is short and the steam drainage cannot be better utilized. Summary of the invention

[0004] The main purpose of this application is to provide a condensate frequency modulation method, device, equipment and medium, aiming to solve the technical problem that when the condensate frequency modulation technology is used in the prior art, the condensate frequency modulation time is short and the steam drainage cannot be better utilized.

[0005] To achieve the above-mentioned object, the first aspect of the present application provides a condensate frequency modulation method, which is applied to a frequency modulation system, wherein the frequency modulation system comprises a hot water tank, a deaerator and a heating component interconnected by pipelines; the method comprises:

[0006] When the frequency modulation system meets a first preset frequency modulation condition, the frequency modulation system is controlled to drain the steam cooled by the heating component or store the condensed water heated by the heating component in the hot water tank;

[0007] When the frequency modulation system meets a second preset frequency modulation condition, the frequency modulation system is controlled to transport the drain water stored in the hot water tank to the deaerator.

[0008] Optionally, the first preset frequency regulation condition includes that the frequency regulation system is not in a frequency regulation condition, or the frequency regulation system is in a load reduction frequency regulation condition, or the frequency regulation system is in a peak regulation condition;

[0009] When the frequency modulation system meets the first preset frequency modulation condition, the frequency modulation system is controlled to store the steam drain cooled by the heating component or the condensed water heated by the heating component in the hot water tank, including:

[0010] When the frequency modulation system satisfies any one of the first preset frequency modulation conditions, the frequency modulation system is controlled to drain the steam cooled by the heating component or store the condensed water heated by the heating component in the hot water tank.

[0011] Optionally, the heating assembly includes a first heater, a second heater and a third heater interconnected by a pipeline;

[0012] When the frequency modulation system is not in the frequency modulation working state, controlling the frequency modulation system to drain and store the steam cooled by the first heater into the hot water tank;

[0013] When the frequency modulation system is in a load-reducing frequency modulation condition, controlling the frequency modulation system to store the condensed water heated by the second heater in the hot water tank;

[0014] When the frequency modulation system is in a peak load condition, the frequency modulation system is controlled to drain and store the steam cooled by the third heater into the hot water tank.

[0015] Optionally, the frequency modulation system further comprises a first valve and a second valve, wherein the first valve is connected between the first heater and the hot water tank through a pipeline, and the second valve is connected between the third heater and the hot water tank through a pipeline;

[0016] When the frequency modulation system is not in the frequency modulation state, the frequency modulation system is controlled to drain and store the steam cooled by the first heater into the hot water tank, including:

[0017] When the frequency modulation system is not in the frequency modulation working state, controlling the first valve to open so as to drain and store the steam cooled by the first heater into the hot water tank;

[0018] When the frequency modulation system is in a peak load condition, controlling the frequency modulation system to drain and store the steam cooled by the third heater into the hot water tank comprises:

[0019] When the frequency modulation system is in a peak load condition, the second valve is controlled to open so as to drain and store the steam cooled by the third heater into the hot water tank.

[0020] Optionally, the second preset frequency regulation condition includes that the deaerator is in a unit load increase frequency regulation condition;

[0021] When the frequency modulation system meets the second preset frequency modulation condition, the frequency modulation system is controlled to transport the drain stored in the hot water tank to the deaerator, including:

[0022] When the deaerator is in the unit load-up frequency regulation condition, the frequency regulation system is controlled to transport the drain stored in the hot water tank to the deaerator.

[0023] Optionally, the frequency modulation system further comprises a third valve and a drain pump, wherein the third valve and the drain pump are sequentially connected between the deaerator and the hot water tank through a pipeline, and the drain pump is arranged in series with the third valve;

[0024] When the deaerator is in the unit load increase frequency modulation condition, controlling the frequency modulation system to transport the drain stored in the hot water tank to the deaerator includes:

[0025] When the deaerator is in the load-up and frequency-modulation condition, the third valve is controlled to open and the drain pump is controlled to start, so as to transport the drain stored in the hot water tank to the deaerator.

[0026] Optionally, the first preset frequency modulation condition further includes that the deaerator is in a load reduction frequency modulation condition of the unit, and the frequency modulation system further includes a fourth valve installed between the deaerator and the hot water tank through a pipeline, and the fourth valve is arranged in parallel with the third valve;

[0027] When the frequency modulation system meets the first preset frequency modulation condition, the frequency modulation system is controlled to store the steam after being cooled by the heating component into the hot water tank, including:

[0028] When the deaerator is in the unit load reduction and frequency regulation condition, the fourth valve is controlled to open, the third valve is controlled to close, and the drain pump is stopped, so as to drain the steam cooled by the heating component and store it in the hot water tank.

[0029] In a second aspect, the present application provides a condensate frequency modulation device, which is applied to a frequency modulation system, wherein the frequency modulation system includes a hot water tank, a deaerator, and a heating assembly interconnected by pipelines; the device includes:

[0030] A first control module, used for controlling the frequency modulation system to store steam drain cooled by the heating component or condensed water heated by the heating component into the hot water tank when the frequency modulation system meets a first preset frequency modulation condition;

[0031] The second control module is used to control the frequency modulation system to transport the drain stored in the hot water tank to the deaerator when the frequency modulation system meets a second preset frequency modulation condition.

[0032] In a third aspect, the present application provides a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method described in the embodiment.

[0033] In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, and a processor executes the computer program to implement the method described in the embodiment.

[0034] Through the above technical solution, the present application has at least the following beneficial effects:

[0035] The condensate frequency modulation method, device, equipment and medium proposed in the embodiments of the present application are applied to a frequency modulation system, wherein the frequency modulation system includes a hot water tank, a deaerator and a heating component interconnected by pipes; the method includes: when the frequency modulation system meets a first preset frequency modulation condition, controlling the frequency modulation system to store the steam drain cooled by the heating component or the condensate heated in the hot water tank; when the frequency modulation system meets a second preset frequency modulation condition, controlling the frequency modulation system to transport the drain stored in the hot water tank to the deaerator.

[0036] That is, when the system needs to perform condensate frequency modulation on the system, if it is detected that the frequency modulation system meets the first preset frequency modulation condition, the steam drain cooled by the heating component or the heated condensate is adjusted to the hot water tank for storage, and the drain / condensate has a certain amount of heat, so while the drain / condensate is stored, the heat of the drain / condensate is also stored; if it is detected that the frequency modulation system meets the second preset frequency modulation condition, the drain stored in the hot water tank is adjusted to the deaerator, and the heat of the drain is also transported to the deaerator. That is, since the frequency modulation system is provided with a hot water tank, the hot water tank can store the hot water with heat after being cooled by the heating component. When the deaerator needs to replenish the water, the hot water with heat in the hot water tank is modulated into the deaerator, and the first preset frequency modulation condition and the second preset frequency modulation condition are pre-set. When the frequency modulation system meets the corresponding conditions, it will automatically adjust the water (condensate). Therefore, the condensate frequency modulation technology can be more reasonably adopted, the duration of the condensate frequency modulation is increased, and the energy of the water is reused, so that the water can be better utilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the computer device structure of the hardware operating environment involved in the embodiments of the present application;

[0038] Figure 2 A flow chart of a condensate frequency modulation method provided in an embodiment of the present application;

[0039] Figure 3 A schematic diagram of a condensate frequency modulation system provided in this embodiment;

[0040] Figure 4 A partial schematic diagram of the condensate frequency modulation system provided in this embodiment;

[0041] Figure 5 A schematic diagram of a condensate water frequency modulation device provided in this embodiment.

[0042] Figure numerals: 1, third heater; 2, deaerator; 3, second heater; 4, second valve; 5, third valve; 6, drain pump; 7, fourth valve; 8, hot water tank; 9, first valve; 10, first heater.

[0043] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0045] In recent years, with the implementation of the dual carbon goals, the installed capacity of new energy sources such as wind power, photovoltaics, and hydropower in my country has grown rapidly. Due to the instability of new energy, it has brought challenges to power supply and security. In the "National Coal-fired Power Unit Transformation and Upgrading Implementation Plan" issued by the National Development and Reform Commission and the National Energy Administration in 2021, the coal-fired power industry is promoted to implement energy-saving and consumption-reduction transformation, heating transformation, and flexibility transformation and manufacturing "three transformation linkage", strictly control coal-fired power projects, continuously optimize the energy and power structure and layout, and deeply promote the clean, efficient, flexible, low-carbon and intelligent high-quality development of coal-fired power, and strive to achieve the carbon peak target of my country's coal-fired power industry. Energy saving, heating, and flexibility are the key issues that coal-fired power units should consider comprehensively.

[0046] Condensate throttling and frequency modulation technology is to control the water level of the condenser and deaerator within a safe range when the unit load changes, and indirectly change the steam extraction volume by changing the condensate volume in a short time, thereby changing the work of the turbine in a short time and increasing the response speed of the unit load to the power grid. In conventional thermal power generation, low-pressure heat exchanger drain flows step by step by gravity, and finally enters the condenser or returns to the condensate system through the low-pressure heat exchanger drain pump. Since a large amount of heat from the drain to the condenser is taken away by the condensate, it can be seen from the literature that the energy consumption of the thermal system with the low-pressure heat exchanger drain pump from gravity to the condenser can be reduced by 2 to 4 kj / (kW.h), so the recovery of low-pressure heat exchanger drain is positive for the thermal system. The duration of condensate frequency modulation is limited by the water level protection of the condenser and deaerator. After the load responds quickly, it needs a certain period of stability. The unit where the drain flows to the condenser step by step has a large amount of cold section loss. The operation of the low-pressure heater drain pump is to control the low-pressure heater water level. When the condensate frequency is modulated, it cannot protect the deaerator water level through its own regulation. When the original coal-fired power unit is in deep peak regulation operation, the high and low-pressure heaters are not drained smoothly, and the emergency drain valve is often opened to discharge the heater drain directly to the condenser, causing a large amount of heat loss. In summary, when condensate frequency modulation is currently used, the frequency modulation time requirements cannot be met, and the steam drain cannot be better utilized.

[0047] In order to solve the above technical problems, the present application provides a condensate frequency modulation method, device, equipment and medium. Before introducing the specific technical solution of the present application, the hardware operating environment involved in the embodiment of the present application is first introduced.

[0048] Reference Figure 1 , Figure 1 A schematic diagram of the computer device structure of the hardware operating environment involved in the embodiment of the present application.

[0049] like Figure 1As shown, the computer device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (WIreless-FIdelity, WI-FI) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0050] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the computer device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0051] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a data storage module, a network communication module, a user interface module and an electronic program.

[0052] exist Figure 1 In the computer device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the computer device of the present application can be set in the computer device, and the computer device calls the condensate frequency modulation device stored in the memory 1005 through the processor 1001, and executes the condensate frequency modulation method provided in the embodiment of the present application.

[0053] Reference Figure 2-Figure 3 Based on the hardware environment of the aforementioned embodiment, the embodiment of the present application provides a condensate frequency modulation method, which is applied to a frequency modulation system, wherein the frequency modulation system includes a hot water tank 8, a deaerator 2 and a heating component interconnected by pipelines; the method includes:

[0054] S10: When the frequency modulation system meets the first preset frequency modulation condition, the frequency modulation system is controlled to drain the steam after being cooled by the heating component or store the condensed water after being heated in the hot water tank 8.

[0055] In the specific implementation process, the first preset frequency modulation condition is a condition set according to the actual use of the frequency modulation system. The heating component has the function of cooling steam to form hydrophobicity or heating condensed water, and the hot water tank 8 has the function of preserving hydrophobic heat.

[0056] S11: When the frequency modulation system meets a second preset frequency modulation condition, the frequency modulation system is controlled to transport the drain stored in the hot water tank 8 to the deaerator 2 .

[0057] In this embodiment, Figure 3 A schematic diagram of a frequency modulation system provided in this embodiment, Figure 3 The frequency modulation system includes boilers, steam turbines and condensers, etc. When the condensate of the frequency modulation system needs to be frequency modulated, if it is detected that the frequency modulation system meets the first preset frequency modulation condition, the steam drain cooled by the heating component or the heated condensate is adjusted to the hot water tank 8 for storage, and the drain / condensate has a certain amount of heat, so when the drain / condensate is stored, the heat of the drain / condensate is also stored; if it is detected that the frequency modulation system meets the second preset frequency modulation condition, the drain stored in the hot water tank 8 is adjusted to the deaerator 2, and the heat of the drain is also transported to the deaerator 2. That is, since the frequency modulation system is provided with a hot water tank 8, the hot water tank 8 can store the steam drain after cooling by the heating component or the condensed water with heat after heating. When the deaerator 2 needs to replenish the drain, the drain with heat in the hot water tank 8 is frequency modulated into the deaerator 2, and the first preset frequency modulation condition and the second preset frequency modulation condition are pre-set. When the frequency modulation system meets the corresponding conditions, the drain (condensed water) will be automatically adjusted. Therefore, the condensed water frequency modulation technology can be more reasonably adopted, the condensed water frequency modulation duration is increased, and the drain energy is reused, so that the drain can be better utilized.

[0058] In some embodiments, possible situations included in the first preset frequency regulation condition are given, that is, the first preset frequency regulation condition includes that the frequency regulation system is not in a frequency regulation condition, or the frequency regulation system is in a load reduction frequency regulation condition, or the frequency regulation system is in a peak regulation condition;

[0059] The step of controlling the frequency modulation system to store the steam drain cooled by the heating component or the condensed water heated by the heating component in the hot water tank 8 when the frequency modulation system meets the first preset frequency modulation condition includes: controlling the frequency modulation system to store the steam drain cooled by the heating component or the condensed water heated by the heating component in the hot water tank 8 when the frequency modulation system meets any one of the first preset frequency modulation conditions.

[0060] In this embodiment, according to the actual use of the frequency modulation system, the first preset frequency modulation condition includes that the frequency modulation system is not in the frequency modulation condition (when operating in non-frequency modulation condition), or the frequency modulation system is in the load reduction frequency modulation condition (when condensate frequency modulation is required to participate in load reduction), or the frequency modulation system is in the peak regulation condition (the coal-fired power unit is in deep peak regulation operation), etc. That is, as long as it is detected that the frequency modulation system meets any of the above-mentioned first preset frequency modulation conditions, the frequency modulation system is controlled so that the steam drain cooled by the heating component or the heated condensate is stored in the hot water tank 8. The hot water tank 8 can store the heat of the drain / condensate, so that the cooled drain is stored in the hot water tank 8 instead of being directly discharged, so the drain can be effectively utilized, and the drain can be reused later, and the heat of the drain can be reused, thereby greatly saving resources.

[0061] In some embodiments, Figure 3-Figure 4 As shown, the heating assembly includes a first heater 10, a second heater 3 and a third heater 1 which are interconnected by pipelines;

[0062] When the frequency modulation system is not in the frequency modulation condition, the frequency modulation system is controlled to store the steam drain cooled by the first heater 10 in the hot water tank 8; when the frequency modulation system is in the load reduction frequency modulation condition, the frequency modulation system is controlled to store the condensed water heated by the second heater 3 in the hot water tank 8; when the frequency modulation system is in the peak load regulation condition, the frequency modulation system is controlled to store the steam drain cooled by the third heater 1 in the hot water tank 8.

[0063] In this embodiment, when the frequency modulation system is not in the frequency modulation condition, the condensate is heated in sequence through the first heater 10, and the steam extraction of the steam turbine is condensed into various levels of drainage. During normal operation, the low-pressure drainage is stored and heat is stored by setting a hot water tank 8. Specifically, the extraction steam flows through the first heater 10 and then flows to the hot water tank 8 for storage and heat storage. When the frequency modulation system is in the load reduction frequency modulation condition, the frequency modulation system is controlled so that the condensate heated by the second heater 3 is stored in the hot water tank 8; when the frequency modulation system is in the peak load regulation condition, the frequency modulation system is controlled so that the steam drainage cooled by the third heater 1 is stored in the hot water tank 8. In this way, according to the different working conditions of the frequency modulation system, the drainage / condensate cooled or heated by the first heater 10, the second heater 3 and the third heater 1 can be automatically controlled to enter the hot water tank 8 for storage, so that the hot water storage entering the hot water tank 8 is more orderly, and the steam drainage can be stored in the hot water tank 8 more reasonably.

[0064] In some embodiments, Figure 3-Figure 4As shown, the frequency modulation system further includes a first valve 9 and a second valve 4, wherein the first valve 9 is connected between the first low-pressure heater 10 and the hot water tank 8 through a pipeline, and the second valve 4 is connected between the third low-pressure heater 1 and the hot water tank 8 through a pipeline;

[0065] When the frequency modulation system is not in the frequency modulation working state, the step of controlling the frequency modulation system to store the steam drain cooled by the first heater 10 in the hot water tank 8 comprises: when the frequency modulation system is not in the frequency modulation working state, controlling the first valve 9 to open, so as to store the steam drain cooled by the first heater 10 in the hot water tank 8;

[0066] When the frequency modulation system is in a peak-shaving condition, the step of controlling the frequency modulation system to drain and store the steam cooled by the third heater 1 into the hot water tank 8 includes: when the frequency modulation system is in a peak-shaving condition, controlling the second valve 4 to open, so as to drain and store the steam cooled by the third heater 1 into the hot water tank 8.

[0067] In this embodiment, when the non-frequency modulation working condition is in operation, the condensate is heated in sequence by the low-pressure heater, and the steam extraction of the steam turbine is condensed into various levels of drainage. During normal operation, the low-pressure drainage is stored and heat is stored by setting a hot water tank 8. The drainage heated by the second heater 3 flows to the first heater 10, and the first valve 9 is opened. The steam drainage cooled by the first heater 10 is controlled by the first valve 9, so that the cooled steam drainage flows to the hot water tank 8 for storage and heat storage. The water level of the first low-pressure heater 10 is controlled by the first valve 9. When the water level is high, the valve is opened, and vice versa. When the condensate frequency modulation is required to participate in load reduction, part of the condensate passing through the second heater 3 is returned to the hot water tank 8 for heat storage to maintain the water level balance of the deaerator 2. When the coal-fired power unit is in deep peak regulation operation, the drainage pressure difference of the third heater 1 is insufficient, and the drainage is not smooth step by step. The second valve 4 is opened to discharge the drainage to the condenser in an emergency to the hot water tank 8, and the heat is recycled at the same time. In this way, by controlling the first valve 9 and the second valve 4 to respectively control the steam drainage of the first heater 10 and the third heater 1, the accuracy of the drainage entering the hot water tank 8 can be greatly improved, so that the amount of water in the hot water tank 8 is at a safe amount, thereby improving the safety of the entire frequency modulation system and greatly improving energy utilization.

[0068] In some embodiments, the second preset frequency modulation condition may include the following situations: the second preset frequency modulation condition includes that the deaerator 2 is in the unit load increase frequency modulation condition;

[0069] The step of controlling the frequency modulation system to transport the drain stored in the hot water tank 8 to the deaerator 2 when the frequency modulation system meets the second preset frequency modulation condition includes: controlling the frequency modulation system to transport the drain stored in the hot water tank 8 to the deaerator 2 when the deaerator 2 is in the unit load increase frequency modulation condition.

[0070] In this embodiment, the water regulating door on the deaerator 2 is closed, the amount of condensate passing through the first low-pressure heater 10, the second low-pressure heater 3 and the third low-pressure heater 1 is reduced, and the amount of steam extraction entering the first low-pressure heater 10, the second low-pressure heater 3 and the third low-pressure heater 1 is reduced. When the amount of steam inlet remains unchanged, the amount of steam passing through the steam turbine increases, thereby rapidly increasing the load to perform unit frequency modulation. At this time, since the flow rate Q1 of the boiler feed water pump has not changed, the water Q2 in the deaerator 2 is reduced, Q1>Q2, and the water level of the deaerator 2 drops, there is a hidden danger in operation safety, so the condensate frequency modulation can only be operated in the safe water level range of the deaerator 2, and the duration is short. In order to solve the problem of safe operation of the water level of the deaerator 2, when the deaerator 2 is in the unit load increase frequency modulation working condition (when the condensate frequency modulation is required to participate in the load increase), the frequency modulation system is automatically controlled to replenish the drain stored in the hot water tank 8 to the condensate pipeline, and finally sent to the deaerator 2 to ensure that the water level of the deaerator 2 is in the safe zone.

[0071] In some embodiments, Figure 3-Figure 4 As shown, the frequency modulation system further includes a third valve 5 and a drain pump 6, the third valve 5 and the drain pump 6 are sequentially connected between the deaerator 2 and the hot water tank 8 through pipelines, and the drain pump 6 is arranged in series with the third valve 5;

[0072] The step of controlling the frequency modulation system to transport the drain stored in the hot water tank 8 to the deaerator 2 when the deaerator 2 is in the unit load increase and frequency modulation condition includes: when the deaerator 2 is in the unit load increase and frequency modulation condition, controlling the third valve 5 to open and controlling the drain pump 6 to start, so as to transport the drain stored in the hot water tank 8 to the deaerator 2.

[0073] In this embodiment, when condensate frequency modulation is required to participate in load-raising frequency modulation, the third valve 5 is opened, the drain pump 6 is started, and the hot water volume Q3 stored in the hot water pipe is connected to the outlet of the second low-pressure heater 3. The amount of water finally delivered to the deaerator 2 is Q2+Q3, which keeps the water level of the deaerator 2 in a safe state for a long time and increases the duration of condensate frequency modulation until the hot water tank 8 reaches the minimum safe water level. When the frequency modulation is completed, the drain pump 6 can choose to exit or deliver the drain to the deaerator 2. In this way, when the water level of the deaerator 2 is in an unsafe state, the water stored in the hot water tank 8 can be more automatically and timely delivered to the deaerator 2, thereby further improving the safety of the deaerator 2; at the same time, the third valve 5 is opened and the drain pump 6 is started through the water level control protection of the hot water tank 8 and the condensate frequency modulation instruction, which greatly increases the flexibility of the system.

[0074] In some embodiments, Figure 3-Figure 4 As shown, the first preset frequency regulation condition also includes that the deaerator 2 is in the unit load reduction frequency regulation condition, and the frequency regulation system also includes a fourth valve 7 installed between the deaerator 2 and the hot water tank 8 through a pipeline, and the fourth valve 7 is arranged in parallel with the third valve 5;

[0075] The step of controlling the frequency modulation system to store the condensate heated by the heating component in the hot water tank 8 when the frequency modulation system meets the first preset frequency modulation condition includes: when the deaerator 2 is in the unit load reduction frequency modulation condition, controlling the fourth valve 7 to open, the third valve 5 to close and the drain pump 6 to stop, so as to store the condensate heated by the heating component in the hot water tank 8.

[0076] In this embodiment, the water supply regulating gate of the deaerator 2 is opened, the amount of condensate passing through the first heater 10 and the second heater 3 increases, the amount of steam extraction entering the first heater 10 and the second heater 3 increases, and the amount of steam passing through the steam turbine is reduced when the steam intake remains unchanged, so that the load is quickly reduced to perform unit frequency modulation. At this time, since the boiler feed water pump flow Q1 does not change, the water supply Q2 of the deaerator 2 increases, Q1<Q2, and the water level of the deaerator 2 rises, which eventually leads to the overflow of the deaerator 2. The original system of the condensate frequency modulation condition does not consider the frequent overflow condition. Therefore, in order to ensure that the water level of the deaerator 2 is in the safe water level range, the duration of the condensate frequency modulation is shortened. In order to solve the problem of safe operation of the water level of the deaerator 2, the abundant condensate amount Q4 is transported to the hot water tank 8, reducing the water supply Q2 of the deaerator 2, and ensuring that the water level of the deaerator 2 is in the safe zone. When the frequency modulation is completed, the fourth valve 7 can choose to exit or continue to store heat until the water level of the water storage tank reaches the set high water level. Specifically, when the deaerator 2 is in the load reduction and frequency regulation condition of the unit (that is, when the deaerator 2 needs to participate in the load reduction and frequency regulation), the fourth valve 7 is opened, the third valve 5 is closed and the drain pump 6 is stopped, and part of the condensate water Q4 flowing to the deaerator 2 and flowing through the second heater 3 is returned to the hot water tank 8 to ensure that the water level of the deaerator 2 is in a safe zone. When the frequency regulation is completed, the fourth valve 7 can choose to exit or continue to store heat.

[0077] In summary, the effective performance of the condensate frequency modulation function is limited by the allowable water level fluctuation range of deaerator 2 and condenser. Combined with the container size of deaerator 2 and condenser and the thermal protection setting value, the allowable water level variation range still has room for further expansion. Taking a 300MW unit as an example, to increase the duration of condensate frequency modulation by three minutes, 50m3 of water needs to be added to deaerator 2. 3 The water volume is used to ensure that the water level of the deaerator 2 is in a safe range. The present application can effectively increase the duration of condensate frequency modulation by setting a hot water tank 8. The hot water tank 8 can not only store the heat of hydrophobicity, but also improve the safety of the deaerator 2.

[0078] In another embodiment, if Figure 5 As shown, based on the same inventive concept as the above-mentioned embodiment, the embodiment of the present application further provides a condensate frequency modulation device, which is applied to a frequency modulation system, wherein the frequency modulation system includes a hot water tank, a deaerator and a heating assembly interconnected by pipelines; the device includes:

[0079] A first control module, used for controlling the frequency modulation system to store steam drain cooled by the heating component or condensed water heated by the heating component into the hot water tank when the frequency modulation system meets a first preset frequency modulation condition;

[0080] The second control module is used to control the frequency modulation system to transport the drain stored in the hot water tank to the deaerator when the frequency modulation system meets a second preset frequency modulation condition.

[0081] It should be noted that each module in the condensate frequency modulation device in this embodiment corresponds one-to-one to each step in the condensate frequency modulation method in the aforementioned embodiment. Therefore, the specific implementation method and technical effects achieved by this embodiment can refer to the implementation method of the aforementioned condensate frequency modulation method, which will not be repeated here.

[0082] In addition, in one embodiment, the present application also provides a computer device, which includes a processor, a memory, and a computer program stored in the memory, and the computer program implements the method in the aforementioned embodiment when executed by the processor.

[0083] In addition, in one embodiment, the present application further provides a computer storage medium, on which a computer program is stored, and the computer program implements the method in the aforementioned embodiment when executed by a processor.

[0084] In some embodiments, the computer readable storage medium may be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, flash memory, magnetic surface memory, optical disk, or CD-ROM; or various devices including one or any combination of the above memories. The computer may be various computing devices including intelligent terminals and servers.

[0085] In some embodiments, executable instructions may be in the form of a program, software, software module, script or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as a stand-alone program or as a module, component, subroutine or other unit suitable for use in a computing environment.

[0086] As an example, executable instructions may, but need not, correspond to a file in a file system, may be stored as part of a file that stores other programs or data, such as in one or more scripts in a HyperText Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files storing one or more modules, subroutines, or code portions).

[0087] By way of example, executable instructions may be deployed to be executed on one computing device, or on multiple computing devices located at one site, or on multiple computing devices distributed across multiple sites and interconnected by a communication network.

[0088] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0089] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0090] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory / random access memory, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a multimedia terminal device (which can be a mobile phone, a computer, a television receiver, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0091] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A condensate frequency modulation method, characterized in that: Applied to a frequency modulation system, the frequency modulation system includes a hot water tank, a deaerator and a heating assembly interconnected by pipelines; the method includes: When the frequency modulation system meets a first preset frequency modulation condition, the frequency modulation system is controlled to drain the steam cooled by the heating component or store the condensed water heated by the heating component in the hot water tank; When the frequency modulation system meets a second preset frequency modulation condition, controlling the frequency modulation system to transport the drain stored in the hot water tank to the deaerator; The first preset frequency regulation condition includes that the frequency regulation system is not in a frequency regulation condition, or the frequency regulation system is in a load reduction condition, or the frequency regulation system is in a peak regulation condition; When the frequency modulation system meets the first preset frequency modulation condition, the frequency modulation system is controlled to store the steam drain cooled by the heating component or the condensed water heated by the heating component in the hot water tank, including: When the frequency modulation system satisfies any one of the first preset frequency modulation conditions, the frequency modulation system is controlled to store the steam drain cooled by the heating component or the condensed water heated by the heating component in the hot water tank; The heating assembly includes a first heater, a second heater and a third heater interconnected by a pipeline; When the frequency modulation system is not in the frequency modulation working state, controlling the frequency modulation system to drain and store the steam cooled by the first heater into the hot water tank; When the frequency modulation system is in a load-reducing frequency modulation condition, controlling the frequency modulation system to store the condensed water heated by the second heater in the hot water tank; When the frequency modulation system is in a peak load operation state, controlling the frequency modulation system to drain and store the steam cooled by the third heater into the hot water tank; The frequency modulation system further comprises a first valve and a second valve, wherein the first valve is connected between the first heater and the hot water tank through a pipeline, and the second valve is connected between the third heater and the hot water tank through a pipeline; When the frequency modulation system is not in the frequency modulation state, the frequency modulation system is controlled to drain and store the steam cooled by the first heater into the hot water tank, including: When the frequency modulation system is not in the frequency modulation working state, controlling the first valve to open so as to drain and store the steam cooled by the first heater into the hot water tank; When the frequency modulation system is in a peak load condition, controlling the frequency modulation system to drain and store the steam cooled by the third heater into the hot water tank comprises: When the frequency modulation system is in a peak load regulation state, the second valve is controlled to open so as to drain and store the steam cooled by the third heater into the hot water tank; The second preset frequency regulation condition includes that the deaerator is in the unit load increase frequency regulation condition; When the frequency modulation system meets the second preset frequency modulation condition, the frequency modulation system is controlled to transport the drain stored in the hot water tank to the deaerator, including: When the deaerator is in a load-increasing frequency-modulation condition, controlling the frequency-modulation system to transport the drain stored in the hot water tank to the deaerator; The frequency modulation system further includes a third valve and a drain pump, wherein the third valve and the drain pump are sequentially connected between the deaerator and the hot water tank through pipelines, and the drain pump is arranged in series with the third valve; When the deaerator is in the unit load increase frequency modulation condition, controlling the frequency modulation system to transport the drain stored in the hot water tank to the deaerator includes: When the deaerator is in the load-up frequency modulation condition, the third valve is controlled to open and the drain pump is controlled to start, so as to transport the drain stored in the hot water tank to the deaerator; The first preset frequency modulation condition also includes that the deaerator is in a load reduction frequency modulation condition of the unit, and the frequency modulation system also includes a fourth valve installed between the deaerator and the hot water tank through a pipeline, and the fourth valve is arranged in parallel with the third valve; When the frequency modulation system meets the first preset frequency modulation condition, the frequency modulation system is controlled to store the condensed water heated by the heating component in the hot water tank, including: When the deaerator is in the unit load reduction and frequency regulation condition, the fourth valve is controlled to open, the third valve is closed, and the drain pump is stopped, so as to store the condensate heated by the heating component in the hot water tank and ensure that the water level of the deaerator is in a safe zone; when the frequency regulation ends, the fourth valve is controlled to exit or continue to store heat.

2. A condensate frequency modulation device, characterized in that: Applicable to a frequency modulation system, the frequency modulation system comprising a hot water tank, a deaerator and a heating assembly interconnected by pipelines; the device comprises: A first control module, used for controlling the frequency modulation system to store steam drain cooled by the heating component or condensed water heated by the heating component into the hot water tank when the frequency modulation system meets a first preset frequency modulation condition; The first preset frequency regulation condition includes that the frequency regulation system is not in a frequency regulation condition, or the frequency regulation system is in a load reduction condition, or the frequency regulation system is in a peak regulation condition; When the frequency modulation system meets the first preset frequency modulation condition, the frequency modulation system is controlled to store the steam drain cooled by the heating component or the condensed water heated by the heating component in the hot water tank, including: When the frequency modulation system satisfies any one of the first preset frequency modulation conditions, the frequency modulation system is controlled to store the steam drain cooled by the heating component or the condensed water heated by the heating component in the hot water tank; The heating assembly includes a first heater, a second heater and a third heater interconnected by a pipeline; When the frequency modulation system is not in the frequency modulation working state, controlling the frequency modulation system to drain and store the steam cooled by the first heater into the hot water tank; When the frequency modulation system is in a load-reducing frequency modulation condition, controlling the frequency modulation system to store the condensed water heated by the second heater in the hot water tank; When the frequency modulation system is in a peak load operation state, controlling the frequency modulation system to drain and store the steam cooled by the third heater into the hot water tank; The frequency modulation system further comprises a first valve and a second valve, wherein the first valve is connected between the first heater and the hot water tank through a pipeline, and the second valve is connected between the third heater and the hot water tank through a pipeline; When the frequency modulation system is not in the frequency modulation state, the frequency modulation system is controlled to drain and store the steam cooled by the first heater into the hot water tank, including: When the frequency modulation system is not in the frequency modulation working state, controlling the first valve to open so as to drain and store the steam cooled by the first heater into the hot water tank; When the frequency modulation system is in a peak load condition, controlling the frequency modulation system to drain and store the steam cooled by the third heater into the hot water tank comprises: When the frequency modulation system is in a peak load regulation state, the second valve is controlled to open so as to drain and store the steam cooled by the third heater into the hot water tank; A second control module is used to control the frequency modulation system to transport the drain stored in the hot water tank to the deaerator when the frequency modulation system meets a second preset frequency modulation condition; The second preset frequency regulation condition includes that the deaerator is in the unit load increase frequency regulation condition; When the frequency modulation system meets the second preset frequency modulation condition, the frequency modulation system is controlled to transport the drain stored in the hot water tank to the deaerator, including: When the deaerator is in a load-increasing frequency-modulation condition, controlling the frequency-modulation system to transport the drain stored in the hot water tank to the deaerator; The frequency modulation system further includes a third valve and a drain pump, wherein the third valve and the drain pump are sequentially connected between the deaerator and the hot water tank through pipelines, and the drain pump is arranged in series with the third valve; When the deaerator is in the unit load increase frequency modulation condition, controlling the frequency modulation system to transport the drain stored in the hot water tank to the deaerator includes: When the deaerator is in the load-up frequency modulation condition, the third valve is controlled to open and the drain pump is controlled to start, so as to transport the drain stored in the hot water tank to the deaerator; The first preset frequency modulation condition also includes that the deaerator is in a load reduction frequency modulation condition of the unit, and the frequency modulation system also includes a fourth valve installed between the deaerator and the hot water tank through a pipeline, and the fourth valve is arranged in parallel with the third valve; When the frequency modulation system meets the first preset frequency modulation condition, the frequency modulation system is controlled to store the condensed water heated by the heating component in the hot water tank, including: When the deaerator is in the unit load reduction and frequency regulation condition, the fourth valve is controlled to open, the third valve is closed, and the drain pump is stopped, so as to store the condensate heated by the heating component in the hot water tank and ensure that the water level of the deaerator is in a safe zone; when the frequency regulation ends, the fourth valve is controlled to exit or continue to store heat.

3. A computer device, characterized in that: The computer device comprises a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method as claimed in claim 1.

4. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and the processor executes the computer program to implement the method as claimed in claim 1.

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