Peak regulation method, device and equipment for cogeneration unit and storage medium

Abstract

The embodiment of the invention discloses a peak regulation method, device and equipment for a cogeneration unit and a storage medium, and relates to the technical field of electric power, and the method comprises the steps: determining the heat user demand heat of a preset region in a current unit time length based on the heat supply scene information of heat users in the preset region and a predicted outdoor temperature sequence of the preset region in the current unit time length, based on heat supply network heat supply steam information extracted from the combined heat and power generation unit by a heat supply network heat supply system in the preset area in the current unit time, heat source heat supply heat of the preset area in the current unit time is determined; the supply and demand deviation is determined according to the heat user demand heat and the heat source heat supply heat, and when the supply and demand deviation is larger than a set deviation threshold value, a heat storage adjusting valve is opened to start a heat storage mode of the heat supply network heat supply system, and when the heat user demand heat is larger than the heat source heat supply heat, heat stored by the heat supply network heat supply system in the heat storage mode is used for heat supply. And the peak regulation flexibility of the cogeneration unit is improved in a peak load shifting manner.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electric power technology, and in particular to a peak-shaving method, device, equipment, and storage medium for a cogeneration unit. Background Art

[0002] Cogeneration units can generate high-temperature, high-pressure steam by burning fuels such as coal and natural gas. The steam first drives a steam turbine to generate electricity, and the waste heat of the steam (or extraction steam) after completing the work can be used for heating. However, traditional cogeneration units generate electricity and heat in a "heat-to-electricity" mode, resulting in a high degree of thermoelectric coupling and low flexible adjustment capabilities of the cogeneration units.

[0003] At present, the reverse decoupling of heating and power generation is achieved by reducing the amount of steam entering the steam turbine to perform work and changing the balance between power generation and heat supply of the cogeneration unit. For example, by adopting the low-pressure cylinder cutting technology, when the demand for heating is large and the demand for power generation is small, part of the steam is diverted from the path originally entering the low-pressure cylinder to perform work and power generation and used directly for heating; or, by adopting high and low pressure bypass heating, the steam is diverted through the bypass pipe for heating, thereby increasing the heating capacity and reducing the power generation.

[0004] However, the above-mentioned thermal-electric decoupling method cannot meet the heating demand at low load and small heating extraction steam flow. Summary of the Invention

[0005] The embodiments of the present application provide a peak-shaving method, device, equipment and storage medium for a cogeneration unit, which can meet the heating demand at low load and small heating extraction steam flow through heat storage or heat release of the urban heating network, realize thermal and electrical decoupling of the cogeneration unit, and improve the peak-shaving flexibility of the cogeneration unit.

[0006] In a first aspect, an embodiment of the present application provides a peak-shaving method for a cogeneration unit, which is applied to a control device of a heat network heating system. The heat network heating system also includes a heat network first station and a secondary heat exchange station. The heat network first station and the secondary heat exchange station are connected via a primary pipe network. A heat storage regulating valve is installed between a primary water supply pipe network and a primary return pipe network of the primary pipe network. The method includes:

[0007] Obtaining heating scenario information of heat users in a preset area, a predicted outdoor temperature sequence in the preset area within a current unit time, and heating network heating steam information extracted from a cogeneration unit by a heating network heating system in the preset area within a current unit time;

[0008] Determine the heat demand of heat users in the preset area in the current unit time based on the heating scene information and the predicted outdoor temperature sequence, and determine the heat supply heat of the heat source in the preset area in the current unit time based on the heating steam information of the heating network;

[0009] The supply and demand deviation is determined based on the heat demand of heat users and the heat supply of heat sources. When the supply and demand deviation is greater than the set deviation threshold, the heat storage regulating valve is opened to start the heat storage mode of the heat network heating system and use the heat stored in the heat storage mode of the heat network heating system to provide heating when the heat demand of heat users is greater than the heat supply of heat sources.

[0010] In a second aspect, an embodiment of the present application provides a peak-shaving device for a cogeneration unit, which is applied to a control device of a heat network heating system. The heat network heating system also includes a heat network first station and a secondary heat exchange station. The heat network first station and the secondary heat exchange station are connected through a primary pipe network. A heat storage regulating valve is installed between the primary water supply pipe network and the primary return pipe network of the primary pipe network. The device includes:

[0011] An acquisition module is used to obtain heating scenario information of heat users in a preset area, a predicted outdoor temperature sequence of the preset area within a current unit time, and heating network heating steam information extracted from the cogeneration unit by the heating network heating system of the preset area within the current unit time;

[0012] A determination module is used to determine the heat demand of heat users in a preset area in the current unit time based on the heating scene information and the predicted outdoor temperature sequence, and to determine the heat supply heat of the heat source in the preset area in the current unit time based on the heating steam information of the heating network;

[0013] The control module is used to determine the supply and demand deviation based on the heat demand of the heat user and the heat supply of the heat source, and when the supply and demand deviation is greater than the set deviation threshold, open the heat storage regulating valve to start the heat storage mode of the heat network heating system and use the heat stored in the heat storage mode of the heat network heating system to provide heating when the heat demand of the heat user is greater than the heat supply of the heat source.

[0014] In a third aspect, an embodiment of the present application provides an electronic device, the electronic device comprising:

[0015] at least one processor; and a memory communicatively coupled to the at least one processor;

[0016] The memory stores a computer program that can be executed by at least one processor, and the computer program is executed by at least one processor so that the at least one processor can execute the peak-shaving method of the cogeneration unit of any embodiment of the present application.

[0017] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a peak-shaving method for a cogeneration unit as in any embodiment of the present application.

[0018] In the embodiment of the present application, by paying real-time attention to the heating scene information in the preset area, predicting the outdoor temperature sequence and the heating steam information of the heating network, the heat demand of the heat user and the heat supply of the heat source can be accurately determined, and the dynamic relationship between the heat demand of the heat user and the heat supply of the heat source can be accurately grasped. Then, the supply and demand deviation is further determined, and when the supply and demand deviation is greater than the set deviation threshold, the heat storage regulating valve is opened, and the heat storage mode of the heating network heating system can be opened to utilize the bypass recirculation of the primary pipeline branch line to achieve the increase of the return water temperature of the primary pipeline network, thereby achieving the purpose of heat storage, that is, when the heating capacity of the cogeneration unit is greater than the heating demand during the peak period, the excess heat demand is transferred through the storage valve. The heat is stored in the urban heat network at the heat exchange station; when the heat demanded by the heat user is greater than the heat supplied by the heat source (i.e. the heating capacity cannot meet the heating demand), that is, when the low-load heating extraction steam of the cogeneration unit cannot meet the heating demand, the stored heat is used for heating, which reduces the demand for heating extraction steam flow when the heating capacity of the cogeneration unit cannot meet the heating demand, and can still meet the heating demand at low load and small heating extraction steam flow, thereby reducing the main steam flow of the cogeneration unit and the power generation power of the cogeneration unit, realizing the thermal and electrical decoupling of the cogeneration unit by means of peak shifting and valley filling, improving the flexibility of peak regulation of the cogeneration unit, and further realizing the integration of source, grid, load and storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 This is a flow chart of a peak-shaving method for a cogeneration unit provided in an embodiment of the present application;

[0021] Figure 2a This is an example diagram of a heat network heating system provided by an embodiment of the present application;

[0022] Figure 2b This is an example diagram of a secondary heat exchange station with heat storage function provided in an embodiment of the present application;

[0023] Figure 3 This is another flow chart of the peak-shaving method for a cogeneration unit provided in an embodiment of the present application;

[0024] Figure 4 This is a structural diagram of a peak-shaving device for a cogeneration unit provided in an embodiment of the present application;

[0025] Figure 5It is a structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0027] It should be noted that the terms "first," "second," "target," and "original" in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or apparatus.

[0028] Figure 1 It is a flow chart of the peak-shaving method of the cogeneration unit provided in the embodiment of the present application. This embodiment can be applied to scenarios where the cogeneration unit needs to be peak-shaving to meet both the power generation demand and the heating demand. The peak-shaving method of the cogeneration unit provided in this embodiment can be executed by the peak-shaving device of the cogeneration unit provided in the embodiment of the present application, and the device can be implemented in software and / or hardware. In a specific embodiment, the peak-shaving device of the cogeneration unit can be integrated into an electronic device, which is a control device of a heat network heating system, such as a computer. The execution subject of this method can be the electronic device (i.e., the control device of the heat network heating system).

[0029] In a specific embodiment, the heat network heating system may include a control device, a heat network first station and a secondary heat exchange station, and the heat network first station is connected to the secondary heat exchange station through a primary pipeline network; the control device is used to control the entire heat network heating system; the heat network first station is used to extract heat from the heat source and distribute the heat to the primary pipeline network in multiple directions; the secondary heat exchange station is used to transfer the heat of the pipeline heating medium (such as high-temperature hot water) transported by the primary pipeline network to the circulating water in the secondary pipeline network, and then provide the heated secondary pipeline network circulating water to the heat user's heat dissipation equipment, thereby providing heat to the heat user; the secondary heat exchange station is connected to the heat user's heat dissipation equipment through the secondary pipeline network.

[0030] For example, Figure 2a The figure shows an example of a heat network heating system provided by an embodiment of the present application. Figure 2a As shown in the figure, when the cogeneration unit is operating normally, steam enters the steam turbine to perform work, part of the exhaust steam from the intermediate pressure cylinder enters the low pressure cylinder to generate electricity, and part of the exhaust steam from the intermediate pressure cylinder is extracted to the first station of the heat network for heating. That is, the heat source of the heat network heating system comes from the steam extracted from the cogeneration unit.

[0031] like Figure 2b The figure shows an example of a secondary heat exchange station with heat storage function provided by an embodiment of the present application, wherein the primary pipe network connects the first station of the heat network with the secondary heat exchange station, and the secondary pipe network connects the secondary heat exchange station with the heat dissipation equipment of the heat user. Figure 2b The water supply of the first network is the hot water delivered from the first station of the heat network to the secondary heat exchange station, the return water of the first network is the cold water delivered from the secondary heat exchange station to the first station of the heat network, the water supply of the second network is the hot water delivered from the secondary heat exchange station to the heat dissipation equipment of the heat user, and the return water of the second network is the cold water delivered from the heat dissipation equipment of the heat user to the secondary heat exchange station; and compared with the conventional secondary heat exchange station, Figure 2b In the secondary heat exchange station, a heat storage bypass and a heat storage regulating valve are added between the primary water supply network and the primary return water network of the primary pipeline network, and the switch of the heat storage bypass is controlled by the heat storage regulating valve. In this way, when the heat demand of the heat users is met, the heat storage regulating valve can be opened, and the excess heat is collected into the return water of the primary network through the heat storage bypass through the primary water supply network, so that the heat of the primary water supply network can be used to directly heat the return water of the primary network, thereby increasing the return water temperature of the primary network, thereby storing heat in the heat network.

[0032] The heating process of the heat network heating system is as follows: the exhaust steam from the intermediate pressure cylinder is extracted to the first station of the heat network; then, the heat exchanger in the first station of the heat network is used to heat the cold water in the first station of the heat network based on the heat of the steam, and the heated hot water is transported to the secondary heat exchange station in each area through the primary pipeline network; then, the heat exchanger in the secondary heat exchange station is used to heat the cold water in the secondary pipeline network based on the heat of the hot water transported by the primary pipeline network, and the heated hot water is transported to the heat dissipation equipment of the heat user; after that, the heat dissipation equipment of the heat user uses the heat of the hot water transported by the secondary pipeline network to heat the indoor air, thereby realizing heating.

[0033] At the same time, in the process of using the heat exchanger in the secondary heat exchange station to heat the cold water in the secondary heat exchange station based on the heat of the hot water transported by the primary pipeline network, the temperature of the hot water transported by the primary pipeline network gradually decreases, and flows back to the first station of the heat network through the primary pipeline network to provide water for recycling at the first station of the heat network, that is, the water in the primary pipeline network is circulating water; in the process of the heat user's heat dissipation equipment using the hot water transported by the secondary pipeline network to exchange heat with the indoor air, the temperature of the hot water transported by the secondary pipeline network gradually decreases, and flows back to the secondary heat exchange station through the secondary pipeline network to provide water for recycling at the secondary heat exchange station, that is, the water in the secondary pipeline network is circulating water.

[0034] See also Figure 1 The peak-shaving method of the cogeneration unit of this embodiment includes but is not limited to the following steps:

[0035] S110, obtaining heating scenario information of heat users in a preset area, a predicted outdoor temperature sequence of the preset area within a current unit time, and heating network heating steam information extracted from the cogeneration unit by the heating network heating system of the preset area within the current unit time.

[0036] Among them, the preset area is a specific geographical area determined according to certain division principles. It can be delineated according to heating zones (for example, different heating sub-areas divided according to the layout of the heating network and the direction of the pipeline) or user type aggregation areas (such as concentrated residential areas and industrial parks, etc.). The purpose is to facilitate the analysis, management and regulation of the heating situation of heat users within a specific range.

[0037] The heating scenario information is a collection of relevant heating information reflecting heat users in a preset area, and may include, for example, the heating area, etc. The heating area is the total area that needs to be heated in the preset area.

[0038] The current unit duration is a fixed and representative time interval selected for monitoring, analyzing, and regulating the heating status of the cogeneration unit, such as one hour or two hours. The predicted outdoor temperature sequence is the predicted outdoor temperature value at each moment within the current unit duration, which can be determined based on a weather forecast system.

[0039] The heating network steam information refers to the key physical parameters of the steam extracted from the cogeneration unit and entering the heating network heating system. It reflects from different perspectives the amount of heat carried by the steam and its ability and status when participating in heat transfer in the heating network. It can include heating steam flow rate, heating steam extraction enthalpy and condensed water enthalpy.

[0040] Specifically, heating scenario information for heat users within a preset area can be obtained. For example, the actual heating area of ​​all heat users within the preset area can be obtained through the heating company's billing system, user declarations, and on-site verification, thereby obtaining the heating area. Then, a predicted outdoor temperature sequence for the preset area within the current unit time can be obtained. That is, the predicted outdoor temperature at each moment within the current unit time can be obtained through a weather forecast system to obtain the predicted outdoor temperature sequence.

[0041] Afterwards, the heating network heating steam information extracted from the cogeneration unit by the heating network heating system in the preset area within the current unit time can be obtained, that is, the heating steam flow rate at each moment in the current unit time can be measured by the steam flow meter installed on the extraction pipe of the cogeneration unit; and the heating steam extraction pressure and temperature at each moment can be measured by the pressure sensor and temperature sensor installed on the extraction pipe, and the condensate pressure and temperature at each moment can be measured by the pressure sensor and temperature sensor installed on the condensate pipe, and then based on the heating steam extraction pressure and temperature at each moment, the heating steam extraction enthalpy at each moment can be calculated using the thermodynamic properties table of water and water vapor or related enthalpy entropy calculation software, and based on the condensate pressure and temperature at each moment, the condensate enthalpy at each moment can be calculated.

[0042] S120. Determine the heat demand of heat users in the preset area in the current unit time based on the heating scene information and the predicted outdoor temperature sequence, and determine the heat supply heat of the heat source in the preset area in the current unit time based on the heating network heating steam information.

[0043] The heat demand is the total amount of heat required by all heat users in a predefined area to maintain a desired indoor comfort temperature (for residential and commercial users) or to meet specific production process requirements (for industrial users) during the current unit time. The heat source heat supply is the total amount of heat provided by the steam extracted from the cogeneration unit during the current unit time.

[0044] Specifically, the amount of heat demanded by heat users in a preset area during the current unit time can be determined based on the heating scenario information and the predicted outdoor temperature sequence. For example, a pre-trained heat load prediction model can be obtained, that is, a relationship model between heat load and outdoor temperature can be established in advance using methods such as regression analysis or neural networks to obtain a heat load prediction model. The heat load prediction model is then trained based on the historical heating data of the preset area and the corresponding outdoor temperature. Then, the average value of multiple predicted outdoor temperatures in the predicted outdoor temperature sequence is calculated to obtain the outdoor average temperature corresponding to the current unit time. The outdoor average temperature corresponding to the current unit time is input into the heat load prediction model to obtain the heat load value corresponding to the current unit time. Subsequently, the product of the heating area of ​​heat users in the preset area and the heat load value is calculated to obtain the amount of heat demanded by heat users in the preset area during the current unit time. The heat load prediction model is a pre-trained neural network model used to predict the corresponding heat load value based on the outdoor temperature. The outdoor average temperature is a value representing the overall level of outdoor temperature during the current unit time.

[0045] Then, the heat source heating quantity of the preset area in the current unit time can be determined based on the heating steam information of the heating network. That is, any moment in the current unit time can be selected as the current moment, and then the difference between the heating steam extraction enthalpy at the current moment and the condensed water enthalpy at the current moment is calculated, and the product of the heating steam flow at the current moment and the difference is calculated to obtain the heat source heating quantity corresponding to the current moment. Then, each moment in the current unit time is traversed and the above calculation process is repeated to obtain the heat source heating quantity corresponding to each moment. Afterwards, the heat source heating quantity corresponding to each moment is integrated with the time as a variable to obtain the heat source heating quantity for the current unit time. That is, the calculation formula of the heat source heating quantity can be expressed as:

[0046]

[0047] Among them, Q s_k (t) represents the heat supply of the k-th unit time; t x_k Indicates the starting time of the kth unit duration; t y_k represents the end time of the kth unit time; q1(t) represents the heating steam flow at time t; h stm (t) represents the extraction enthalpy of heating steam at time t; h cds (t) represents the condensation enthalpy of water at time t.

[0048] S130. Determine the supply-demand deviation based on the heat demand of the heat user and the heat supply of the heat source, and when the supply-demand deviation is greater than the set deviation threshold, open the heat storage regulating valve to start the heat storage mode of the heat network heating system and use the heat stored in the heat storage mode of the heat network heating system to provide heating when the heat demand of the heat user is greater than the heat supply of the heat source.

[0049] The supply-demand deviation is used to measure the degree of imbalance between heat supply and demand within the heating network heating system over a specific period of time. The set deviation threshold is a pre-set value used to measure the standard limit of the deviation between the heat demand of the heat user and the heat supply of the heat source, which is used to determine whether to activate the heat storage mode. The user can adjust and set the set deviation threshold based on actual usage needs. This embodiment of the application does not specifically limit this; for example, the set deviation threshold can be 5%.

[0050] The heat storage mode is a mode in which the water supply of one network is used to directly heat the return water of one network. When the heat demanded by heat users is less than the heat supply of heat source, that is, when the cogeneration unit is in the peak period, excess heat can be stored so that when the heat demanded by heat users is greater than the heat supply of heat source, that is, when the cogeneration unit is in the peak period, the heat stored in the heat network heating system in the heat storage mode can be used for heating.

[0051] Specifically, after obtaining the heat demanded by the heat user and the heat supplied by the heat source for the current unit time, the supply and demand deviation can be determined based on the heat demanded by the heat user and the heat supplied by the heat source, that is, the difference between the heat supplied by the heat source and the heat demanded by the heat user can be calculated to obtain the supply and demand deviation; or, the difference between the heat supplied by the heat source and the heat demanded by the heat user can be calculated, and the ratio of the difference to the heat demanded by the heat user can be calculated to obtain the supply and demand deviation.

[0052] Then, a pre-set deviation threshold is obtained, and the supply-demand deviation is compared with the set deviation threshold. If the supply-demand deviation is greater than the set deviation threshold, it indicates that the heat source heat supply has a surplus after meeting the user's heating demand. At this time, the heat storage regulating valve can be opened to start the heat storage mode of the heat network heating system. The excess heat in the heat source heat supply can be stored in the primary pipe network, so as to increase the return water temperature of the primary pipe network by bypassing and recycling the primary pipe network branch line, thereby achieving the purpose of heat storage. This is convenient for using the stored heat for heating when the heat user's heat demand is greater than the heat source heat supply (that is, when the heating capacity cannot meet the heating demand), that is, when the low-load heating extraction steam of the cogeneration unit cannot meet the user's heat demand. If the supply-demand deviation is less than the set deviation threshold, it indicates that the heat source heat supply has no surplus after meeting the user's heating demand. At this time, there is no need to open the heat storage regulating valve, that is, the heat storage mode of the heat network heating system is not started.

[0053] After the heat storage regulating valve is opened, the opening of the heat storage regulating valve can be adjusted. For example, the opening of the heat storage regulating valve can be adjusted according to a pre-set control strategy based on the specific numerical value of the supply and demand deviation. That is, if the supply and demand deviation is greater than the set deviation threshold and less than the first set value, the opening of the heat storage regulating valve is determined to be the first set opening; if the supply and demand deviation is greater than or equal to the first set value, the opening of the heat storage regulating valve is determined to be the second set opening, and the first set opening is less than the second set opening; at the same time, in the process of adjusting the opening of the heat storage regulating valve, the changes in relevant parameters in the heat network heating system, such as temperature, pressure and flow, are monitored in real time to ensure the stable operation of the heat network heating system during the adjustment process, and to avoid abnormal conditions such as sudden pressure changes that affect the normal operation of the heat network heating system.

[0054] The technical solution of the embodiment of the present application can accurately determine the heat demand of heat users and the heat supply of heat sources by paying real-time attention to the heating scene information in the preset area, predicting the outdoor temperature sequence and the heating steam information of the heating network, and accurately grasping the dynamic relationship between the heat demand of heat users and the heat supply of heat sources. Then, the supply and demand deviation is further determined, and when the supply and demand deviation is greater than the set deviation threshold, the heat storage regulating valve is opened, and the heat storage mode of the heating network heating system can be opened to utilize the bypass recirculation of the primary pipeline branch line to achieve the increase of the return water temperature of the primary pipeline, thereby achieving the purpose of heat storage, that is, when the heating capacity of the cogeneration unit is greater than the heating demand during the peak period, the excess heat demand is passed The excess heat is stored in the urban heating network at the heat storage heat exchange station; when the heat demanded by the heat user is greater than the heat supplied by the heat source (i.e., the heating capacity cannot meet the heating demand), that is, when the low-load heating extraction steam of the cogeneration unit cannot meet the heating demand, the stored heat is used for heating, which reduces the demand for heating extraction steam flow when the heating capacity of the cogeneration unit cannot meet the heating demand, and can still meet the heating demand at low load and small heating extraction steam flow, thereby reducing the main steam flow of the cogeneration unit and the power generation power of the cogeneration unit, and realizing the thermal and electrical decoupling of the cogeneration unit by means of peak shifting and valley filling, thereby improving the flexibility of peak regulation of the cogeneration unit and further realizing the integration of source, grid, load and storage.

[0055] The following further describes a peak-shaving method for a cogeneration unit provided by an embodiment of the present application. Figure 3 This is another flow chart of the peak load regulation method for a combined heat and power unit provided in the embodiment of the present application. This embodiment of the present application is optimized based on the above embodiments. Figure 3 The method of this embodiment includes but is not limited to the following steps:

[0056] S301, obtaining heating scenario information of heat users in a preset area, a predicted outdoor temperature sequence of the preset area within a current unit time, and heating network heating steam information extracted from a cogeneration unit by a heating network heating system in the preset area within a current unit time.

[0057] Optionally, the heating scenario information may include the building heating area thermal index, the heating area, the indoor calculated temperature and the heating outdoor calculated temperature; the building heating area thermal index is the heat required per unit building area per unit time to maintain the required indoor calculated temperature under a specific indoor and outdoor temperature difference and certain thermal performance conditions of the enclosing structure; the indoor calculated temperature is the temperature that the indoor room needs to reach after heating the indoor room, that is, the required indoor calculated temperature; the heating outdoor calculated temperature is a specific outdoor temperature value used to determine the heating heat load of the building. It is a representative outdoor temperature obtained through statistics and analysis, representing the temperature under local relatively cold and long-lasting weather conditions during a certain period of time (usually the heating season).

[0058] Specifically, the heating scenario information of heat users in the preset area can be obtained, that is, the actual total heating area of ​​all heat users in the preset area can be obtained through the heating company's charging system, user declaration and on-site verification, and the heating area can be obtained; the indoor design temperature standard set in advance for the preset area (generally 18°C ​​to 22°C) can be obtained to obtain the indoor calculated temperature; the average daily temperature of the preset area in previous years, which is not guaranteed for 5 days a year, can be obtained to obtain the heating outdoor calculated temperature; and the indoor and outdoor temperature difference can be determined based on the indoor calculated temperature and the heating outdoor calculated temperature, and the building heating area thermal index can be determined based on the indoor and outdoor temperature difference and the thermal insulation performance of the building envelope structure in the preset area.

[0059] It should be noted that, for implementation details of obtaining the predicted outdoor temperature sequence and the heating network heating steam information, reference may be made to the detailed description of S110 , which will not be repeated here.

[0060] S302: Determine the heat demand of heat users in the preset area in the current unit time based on the heating scene information and the predicted outdoor temperature sequence.

[0061] Specifically, based on the predicted outdoor temperature sequence, the outdoor average temperature of the preset area in the current unit time is determined; the difference between the indoor calculated temperature and the outdoor average temperature is calculated to obtain a first difference corresponding to the current unit time, and the difference between the indoor calculated temperature and the heating outdoor calculated temperature is calculated to obtain a second difference; the product of the thermal index of the building thermal area and the heating area is calculated to obtain the building heat demand, and the ratio of the first difference corresponding to the current unit time to the second difference is calculated to obtain the heat demand ratio corresponding to the current unit time; the product of the building heat demand and the heat demand ratio is determined as the heat demand of the heat user in the preset area in the current unit time. The first difference represents the temperature difference between indoor and outdoor environments in the current unit time. The larger the first difference, the greater the power of heat loss from indoor to outdoor, and the more heat the building needs to supplement to maintain the indoor calculated temperature; the second difference represents the temperature difference between indoor and outdoor under the most unfavorable outdoor temperature conditions; the building heat demand represents the total heat required for the building to maintain the indoor calculated temperature in unit time in theory; the heat demand ratio represents the ratio of the actual indoor and outdoor temperature difference to the indoor and outdoor temperature difference under the most unfavorable design working condition of the heating network heating system (with the heating outdoor calculated temperature as a reference) in the current unit time. The larger the heat demand ratio, the closer the building's heat demand in the current unit time is to the heat demand level under the most unfavorable design working condition, and the heating network heating system needs to provide a heat supply closer to full load, that is, the greater the heat demand of the heat user; conversely, the smaller the heat demand ratio, the smaller the heat demand of the heat user.

[0062] That is, the calculation formula for the heat demand of heat users can be expressed as:

[0063]

[0064] Among them, Q u_k (t) represents the heat demand of the k-th unit time user; q A Indicates the building thermal area thermal index; A indicates the heating area; T1 indicates the indoor calculated temperature; T 2_k It represents the average outdoor temperature during the kth unit time; T3 represents the calculated outdoor temperature during heating.

[0065] In the implementation of this application, the heat demand ratio corresponding to the current unit time can be accurately determined through the predicted outdoor temperature sequence, indoor calculated temperature, and heating outdoor calculated temperature within the current unit time; and then further combined with the building thermal area thermal index and the heating area, the heat demand of heat users in the preset area in the current unit time can be accurately determined, providing an accurate data basis for the parameter configuration of the heat network heating system, and providing an accurate data basis for the subsequent determination of the supply and demand deviation, thereby ensuring that the heat network heating system meets the user's heat demand.

[0066] S303: Determine whether the power grid is in a peak load phase based on the power load dispatching instruction issued by the power grid dispatching system to the cogeneration unit.

[0067] The load dispatch instructions are power generation adjustment commands issued by the grid dispatch system to the cogeneration units, including load reduction and load increase instructions. The peak load phase is when the power generation of the cogeneration units is increased.

[0068] Specifically, after obtaining the heat demand of the heat user, the power grid dispatch system can obtain the electric load dispatch instruction issued to the cogeneration unit. If the electric load dispatch instruction is an electric load increase instruction, it indicates that the cogeneration unit needs to increase its power generation. At this time, it can be determined that it is in the peak electric load stage (i.e., the peak period) and execute S304. If the electric load dispatch instruction is an electric load decrease instruction, it indicates that the cogeneration unit needs to reduce its power generation. At this time, it can be determined that it is in the peak electric load stage (i.e., the peak period) and execute S313. The peak electric load stage is the stage of reducing the power generation of the cogeneration unit.

[0069] S304: When it is determined that the electric load is at the peak stage, the amount of heat supplied by the heat source in the preset area in the current unit time is determined based on the heating steam information of the heating network.

[0070] Specifically, when it is determined that the power load is at its peak, it indicates that the power generation of the cogeneration unit has increased, the steam flow entering the steam turbine has increased accordingly, and the heating steam flow entering the heating network system will also increase. However, at this time, the heat demand of the heat users has not changed or the heat demand of the heat users has changed little. At this time, there may be a situation where the heating capacity is greater than the heating demand. Therefore, based on the heating steam information of the heating network, the heat source heating amount of the preset area in the current unit time can be determined to determine whether the heating capacity is greater than the heating demand.

[0071] S305: Determine whether the outlet temperature of the first station of the heating network is greater than a second set temperature threshold.

[0072] The outlet temperature of the heating network's first station is the temperature of the hot water at the outlet of the heating network's first station when the first station delivers the heat exchanged hot water to the primary pipe network. The second set temperature threshold is a value pre-set during the peak power load phase and is used to distinguish between different heating operation adjustment strategy scenarios, thereby taking different adjustment measures to ensure the normal operation and heating effect of the heating network heating system. Users can adjust and set the second set temperature threshold based on actual usage needs. This embodiment of the present application does not specifically limit this; for example, the second set temperature threshold can be 100°C.

[0073] Specifically, after determining the heat supply amount of the heat source, if the outlet temperature of the first station of the heating network is greater than the second set temperature threshold, S306 can be executed; if the outlet temperature of the first station of the heating network is not greater than the second set temperature threshold, S307 can be executed.

[0074] S306: When the outlet temperature of the first station of the heating network is greater than the second set temperature threshold, the circulating water flow rate is increased with the temperature rise rate not exceeding the first set rate as the adjustment standard.

[0075] The temperature rise rate is the rate at which the temperature of the circulating water (the medium used to transfer heat within the heating network) in the heating network rises. The first set rate is a pre-set maximum rate at which the circulating water temperature can rise in the quantity control mode. This can be set based on actual conditions; for example, the first set rate can be 3°C / h.

[0076] Specifically, when the outlet temperature of the heating network's first station exceeds the second set temperature threshold, the quantity adjustment mode may be determined. That is, the circulating water flow rate, i.e., the water supply flow rate of the first network, may be gradually increased, with the temperature rise rate not exceeding the first set rate as the adjustment standard. Then, S308 is executed.

[0077] S307: When the outlet temperature of the first station of the heating network is not greater than the second set temperature threshold, the circulating water flow rate and the circulating water temperature are increased with the temperature rise rate not exceeding the second set rate as the adjustment standard.

[0078] Among them, the second set rate is a pre-set maximum speed limit for allowing the circulating water temperature to rise in the quantity-quality synchronization mode, which can be specifically limited according to actual conditions; and the first set rate is less than the second set rate; for example, the second set rate can be 5°C / h.

[0079] Specifically, if the outlet temperature of the heating network's first station is no greater than the second set temperature threshold, the quantity-quality synchronization mode can be adopted. That is, the circulating water flow rate and temperature are gradually increased, with the temperature rise rate not exceeding the second set rate. This means that the water flow rate and temperature of the first network are gradually increased. Then, S308 is executed.

[0080] S308. Determine the supply-demand deviation based on the heat demanded by the heat user and the heat supplied by the heat source.

[0081] S309: Determine whether the supply-demand deviation is greater than a set deviation threshold.

[0082] Specifically, if the supply-demand deviation is greater than the set deviation threshold, S310 may be executed; otherwise, S312 may be executed.

[0083] S310. When the supply-demand deviation is greater than the set deviation threshold, the heat storage regulating valve is opened to start the heat storage mode of the heat network heating system and to use the heat stored in the heat storage mode of the heat network heating system to provide heating when the heat demanded by the heat user is greater than the heat supplied by the heat source.

[0084] Afterwards, execute S311.

[0085] S311. Determine whether the electric load dispatching instruction issued by the power grid dispatching system to the cogeneration unit has changed.

[0086] Specifically, after the heat storage regulating valve is opened, the electric load dispatching instruction issued by the power grid dispatching system to the cogeneration unit can be obtained in real time, and it is determined whether the electric load dispatching instruction has changed. If the electric load dispatching instruction has changed, that is, from an electric load increase instruction to an electric load decrease instruction, the execution is returned to determine the heat source heating amount of the preset area in the current unit time based on the heating steam information of the heating network, until the supply and demand deviation is no more than the set deviation threshold, and then the heat storage regulating valve is closed to end the heat storage mode of the heating network heating system, that is, return to execution S304 to S309, and determine whether to close the heat storage regulating valve based on the size relationship between the supply and demand deviation and the set deviation threshold.

[0087] If the electric load dispatching instruction does not change, that is, the electric load dispatching instruction keeps the electric load increase instruction unchanged, then continue to execute S310, that is, continue to open the heat storage regulating valve to continuously start the heat storage mode of the heat network heating system.

[0088] S312: When the supply-demand deviation is not greater than the set deviation threshold, close the heat storage regulating valve to end the heat storage mode of the heat network heating system.

[0089] Specifically, when the supply-demand deviation is not greater than the set deviation threshold, it indicates that the heat source has no remaining heat after meeting the user's heating demand. At this time, the heat storage regulating valve can be closed to end the heat storage mode of the heat network heating system, so that all the heat supplied by the heat source is used to provide heating for the user.

[0090] S313: When it is determined that the system is in the peak load regulation stage, the heat release mode is started to supply heat by utilizing the heat stored in the heat storage mode of the heat supply system of the heat network.

[0091] Among them, the heat release mode is a mode in which when the cogeneration unit is in a situation where it needs to reduce the electric load to meet the peak-shaving demand of the power grid, the heat stored in the heat network heating system in the heat storage mode is used to provide heat to the heat users. At this time, there is no need to increase the heat extraction steam flow of the cogeneration unit to meet the heating needs of the heat users. The heat stored in the heat network heating system in the heat storage mode can meet the heating needs of the heat network users, so the electric load of the cogeneration unit is allowed to continue to decline.

[0092] Specifically, when it is determined that the power load is in the peak load regulation stage, it indicates that the power generation of the cogeneration unit is reduced, the steam flow entering the steam turbine is reduced accordingly, and the heating steam flow entering the heating network heating system will also be reduced. However, at this time, the heat demand of the heat users has not changed or the heat demand of the heat users is still high, resulting in the heating capacity being less than the heating demand. Therefore, the heat release mode of the heating network heating system can be started to use the heat stored in the heat storage mode of the heating network heating system for auxiliary heating to meet the user's heating needs.

[0093] Afterwards, S314 or S315 may be executed.

[0094] S314: Determine whether the electric load dispatch instruction has changed.

[0095] Specifically, the electric load dispatching instruction issued by the power grid dispatching system to the cogeneration unit can be obtained in real time, and it is possible to determine whether the electric load dispatching instruction has changed. If the electric load dispatching instruction has changed, that is, from an electric load decrease instruction to an electric load increase instruction, it indicates that the power generation of the cogeneration unit has increased, and the heating steam flow entering the heat network heating system has also increased. At this time, the heat release mode can be ended and S304 can be executed to determine whether to start the heat storage mode.

[0096] If the electric load dispatch instruction does not change, that is, the electric load reduction instruction remains unchanged, S313 may be executed to continue to maintain the heat release mode.

[0097] S315: Determine whether the outlet temperature of the first station of the heating network is greater than a first set temperature threshold.

[0098] Among them, the first set temperature threshold is a value predetermined in the peak load regulation stage, which is used to determine whether to continue to maintain the heat release mode and can be specifically defined according to actual conditions; for example, the first set temperature threshold is 85°C.

[0099] Specifically, if the outlet temperature of the first station of the heating network is greater than the first set temperature threshold, S313 is executed to continue to maintain the heat release mode; if the outlet temperature of the first station of the heating network is not greater than the first set temperature threshold, S316 is executed.

[0100] S316: When the outlet temperature of the first station of the heating network is not greater than the first set temperature threshold, the heat release mode is terminated.

[0101] It should be noted that S314, S315 and S316 are parallel solutions, and any one branch can be selected for execution, which is not specifically limited in this embodiment.

[0102] Optionally, the heat release mode is terminated when the electric load scheduling instruction changes or the outlet temperature of the first station of the heating network is not greater than the first set temperature threshold; the heat release mode is continued when the electric load scheduling instruction does not change and the outlet temperature of the first station of the heating network is greater than the first set temperature threshold.

[0103] Optionally, a heating network heating model of the preset area is established based on the heating network topology, heating network attribute information and heat user building attribute information of the preset area; and the heating network heating model is displayed.

[0104] Among them, the heat network topology is the layout form and logical relationship of the interconnection between the various components in the heat network heating system. The heat network can be regarded as a fluid network, with each pipeline as a branch, the heat source, the first station of the heat network, the secondary heat exchange station, the water pump, the regulating valve and the pipeline connection point as nodes, and the flow direction of the fluid as the branch direction. A directed graph is constructed to represent the heat network topology.

[0105] The heat network attribute information is a detailed description of the relevant physical characteristics, operating parameters, etc. of each component of the heat network, which may include pipeline attributes (such as material, pipe diameter, wall thickness, insulation conditions and ground elevation), equipment attributes (such as water pump flow, valve type and opening range, and heat exchange efficiency and heat exchange area of ​​the heat exchanger), and operating parameters (such as supply water temperature, return water temperature, supply water pressure, return water pressure, supply water flow and valve opening, etc.).

[0106] The heat user building attribute information is a description of the heating-related characteristics of each building receiving heating services, which may include basic building conditions, envelope structure attributes, and interior design parameters.

[0107] The heating network model is a digital model that integrates and analyzes the heating network topology, heating network attribute information and heat user building attribute information of a preset area, and is constructed using mathematical methods, physical principles and computer simulation. It can be used to simulate, predict and analyze the operating status and heating effect of the heating network heating system.

[0108] Specifically, digital twin technology can be used to establish a heating network heating model for a preset area based on the heating network topology, heating network attribute information and heat user building attribute information of the preset area, and display the heating network heating model on the display screen so that users can view the heating situation in the preset area; at the same time, based on the heating network hydraulic working condition simulation model, the operating parameters such as each pipeline pressure, valve opening and secondary network water supply temperature can be calculated in real time according to actual conditions, and the corresponding operating parameters can be set and saved in each heating network node of the heating network heating model, so that users can view the operating status and heating effect of the heating network heating system in real time.

[0109] Optionally, the process of determining the operating parameters of each heating network node based on the heating network hydraulic condition simulation model is as follows:

[0110] The directed graph G(V,E) representing the topological structure of the heating network contains n nodes and m pipelines, where V represents the set of heating network nodes and E represents the set of heating network pipelines. The relationship between nodes and pipelines can be expressed by the association matrix A=(a ij ) n×m Indicates that each row in the association matrix A corresponds to a node, and each column corresponds to a pipeline; any element a in the association matrix ij (1≤i≤n,1≤j≤m) is defined as follows:

[0111]

[0112] (1) The heating network heating system satisfies the flow balance AQ = 0, where Q represents the branch flow matrix, Q = [q1,q2,…,q m ] T ,q j (j=1,2,3,…,m) represents the working fluid flow rate of the jth branch.

[0113] (2) The heating network heating system meets the heat balance:

[0114]

[0115] in, represents the incidence matrix of the inflow node, A represents the outflow node's incidence matrix; H in Represents the heat flowing into the node; H out Indicates the heat flowing out of the node; h in_m represents the enthalpy value of the working fluid flowing into the node of the mth branch; h out_m Represents the enthalpy value of the working fluid flowing out of the node of the mth branch.

[0116] (3) Pipeline network boundary constraints in the heating network system:

[0117]

[0118] Among them, T s T is the water supply temperature of the heating network heating system; r P is the return water temperature of the heating network heating system; s The water supply pressure of the heating network heating system; P r is the return water pressure of the heating network heating system; the subscripts min and max are the minimum and maximum design values ​​of the corresponding parameters respectively.

[0119] If the heat loss of the heat pipe network is not considered, when the supply and demand of the heat network is balanced, the heat supply of the heat source per unit time, the heat exchange of the first station of the heat network, the heat exchange of the secondary heat exchange station and the heat demand of the heat user are equal, that is:

[0120] Q s_k (t) = Q ht1_k (t) = Q ht2_k (t) = Q u_k (t)

[0121]

[0122] Among them, Q ht1_k (t) represents the heat exchange rate of the first station of the heat network for the kth unit time; Q ht2_k (t) represents the heat exchange rate of the secondary heat exchange station in the kth unit time; U represents the number of the first station in the heat network; V represents the number of secondary heat exchange stations; It represents the constant pressure specific heat capacity of the primary pipe network and is treated as a constant; represents the constant-pressure specific heat capacity of the secondary pipe network, which is treated as a constant; q w1 (t) represents the water supply flow of a network at time t; q w2 (t) represents the water supply flow of the secondary network at time t; T s1_u (t) represents the water supply temperature of the uth heating network first station at time t, that is, the water supply temperature of the first network; T r1_u (t) represents the return water temperature of the uth heating network first station at time t, that is, the return water temperature of the first network; T s2_v (t) represents the water supply temperature of the vth secondary heat exchange station at time t, that is, the water supply temperature of the secondary network; T r2_v (t) represents the return water temperature of the vth secondary heat exchange station at time t, that is, the return water temperature of the secondary network.

[0123] Therefore, in the process of heating supply by the heating network heating system, the water supply temperature of the second network is used as the calculation target value, and the above formula is used to comprehensively calculate the actual operating parameters of each heating network node, and the flow balance, heat balance and pipe network boundary constraints are met. Then, the determined actual operating parameters are marked in the heating network heating model; in the heat storage mode, the excess heat is matched with the valve opening of the heat storage regulating valve to realize the heat storage function.

[0124] In the embodiment of the present application, by establishing and displaying a heating network heating model, the heating situation in a preset area can be comprehensively displayed, which is convenient for users to view and evaluate the heating effect of the preset area, and can provide strong support for the decision-making of the heating company; at the same time, precise heating regulation can be achieved to avoid local overheating or insufficient heating, thereby improving the quality of heating services and user satisfaction.

[0125] The technical solution of the embodiment of the present application is that when it is determined that the power load dispatching instruction issued by the power grid dispatching system to the cogeneration unit is in the peak power load stage, it can trigger the execution of determining the heat source heating amount of the preset area in the current unit time based on the heating steam information of the heating network, so as to determine whether to start the heat storage mode; when it is determined that it is in the peak power load stage, the heat release mode is started to utilize the heat stored in the heating system of the heating network in the heat storage mode for heating. Taking advantage of the large capacity and long time lag of the urban heating network, when the heating capacity of the cogeneration unit is greater than the heating demand, the primary pipeline network branch line bypass recirculation is used to increase the return water temperature of the primary pipeline network, thereby achieving the purpose of heat storage; When the heating capacity of the cogeneration unit cannot meet the heating demand during the peak-shaving period, the heat stored in the heat storage mode of the heat network heating system is released, so that the cogeneration unit can still meet the user's heating demand when the power load is low. It realizes the storage of heat during the peak power consumption period and the release of heat during the peak power consumption period, reducing the demand of the heat network heating system for the heating extraction steam flow, and can reduce the main steam flow of the cogeneration unit, so that the power load is reduced, thereby further realizing thermal and electrical decoupling by shifting peaks and filling valleys, improving the flexibility of the cogeneration unit in peak-shaving, and effectively solving the common problem of cogeneration units that "they cannot be raised during peak periods and cannot be suppressed during valley periods".

[0126] When the outlet temperature of the first station of the heating network is greater than the second set temperature threshold, the circulating water flow rate is increased with the temperature rise rate not exceeding the first set rate as the adjustment standard; when the outlet temperature of the first station of the heating network is not greater than the second set temperature threshold, the circulating water flow rate and circulating water temperature are increased with the temperature rise rate not exceeding the second set rate as the adjustment standard. This can ensure the safe and stable operation of the heating network heating system, and can reasonably distribute heat to avoid local overheating, thereby improving energy utilization efficiency.

[0127] After starting the heat release mode, when the outlet temperature of the first station of the heating network is not greater than the first set temperature threshold, the heat release mode is ended, which can effectively prevent the water temperature in the heating network from being too low, and avoid the low temperature from affecting the heating effect; or, when the electric load scheduling instruction changes, it triggers the execution of the heat source heating heat of the preset area in the current unit time based on the heating steam information of the heating network. The heating mode of the heating network heating system can be flexibly adjusted according to the electric load scheduling instruction, realizing flexible peak regulation of the cogeneration unit under different electric load demands, thereby optimizing the distribution of thermal and electric loads and improving the operating efficiency of the cogeneration unit.

[0128] After the heat storage regulating valve is opened to start the heat storage mode of the heat network heating system, when the electric load dispatching instruction issued by the power grid dispatching system to the cogeneration unit changes, the execution returns to determine the heat source heating amount of the preset area in the current unit time based on the heating steam information of the heat network, until the supply and demand deviation is no more than the set deviation threshold, and then the heat storage regulating valve is closed to end the heat storage mode of the heat network heating system. The opening or closing of the heat storage regulating valve can be accurately adjusted based on the electric load dispatching instruction issued by the power grid dispatching system and the dynamic relationship between energy supply and demand, thereby improving the accuracy of starting or closing the heat storage mode, enabling the heat network heating system to flexibly respond to changes in the electric load of the cogeneration unit, thereby improving energy utilization, and preparing for the heat release mode when the heating capacity of the cogeneration unit cannot meet the heating demand during the peak period.

[0129] Figure 4 This is a schematic diagram of a peak-shaving device for a combined heat and power generation unit provided in an embodiment of the present application, with reference to Figure 4 The peak-shaving device of the combined heat and power unit may include:

[0130] An acquisition module 410 is configured to acquire heating scenario information of heat users in a preset area, a predicted outdoor temperature sequence of the preset area within a current unit time, and heating network heating steam information extracted from a cogeneration unit by a heating network heating system in the preset area within a current unit time;

[0131] Determination module 420, for determining the heat demand of heat users in the preset area in the current unit time based on the heating scenario information and the predicted outdoor temperature sequence, and determining the heat supply heat of the heat source in the preset area in the current unit time based on the heating network heating steam information;

[0132] The control module 430 is used to determine the supply-demand deviation based on the heat demand of the heat user and the heat supply of the heat source, and when the supply-demand deviation is greater than the set deviation threshold, open the heat storage regulating valve to start the heat storage mode of the heat network heating system and use the heat stored in the heat storage mode of the heat network heating system to provide heating when the heat demand of the heat user is greater than the heat supply of the heat source.

[0133] In one embodiment, the peak-shaving device of the cogeneration unit also includes a first determination module, which is specifically used to: after determining the heat demand of heat users in the preset area in the current unit time based on the heating scene information and the predicted outdoor temperature sequence, determine whether it is in the peak electric load stage based on the electric load scheduling instruction issued by the power grid scheduling system to the cogeneration unit; when it is determined that it is in the peak electric load stage, trigger the execution of the heat source heating heat for the preset area in the current unit time based on the heating steam information of the heating network; when it is determined that it is in the peak electric load stage, start the heat release mode to use the heat stored in the heating system of the heating network in the heat storage mode for heating.

[0134] In one embodiment, the peak-shaving device of the cogeneration unit also includes a second determination module, which is specifically used to: after starting the heat release mode, end the heat release mode when the outlet temperature of the first station of the heating network is not greater than the first set temperature threshold; or, when the electric load scheduling instruction changes, trigger the execution of determining the heat source heating amount of the preset area in the current unit time based on the heating steam information of the heating network.

[0135] In one embodiment, the peak-shaving device of the cogeneration unit also includes a third determination module, which is specifically used to: before determining the supply and demand deviation based on the heat user's demand for heat and the heat source's supply for heat, when the outlet temperature of the first station of the heating network is greater than the second set temperature threshold, increase the circulating water flow rate with the temperature rise rate not exceeding the first set rate as the adjustment standard; when the outlet temperature of the first station of the heating network is not greater than the second set temperature threshold, increase the circulating water flow rate and circulating water temperature with the temperature rise rate not exceeding the second set rate as the adjustment standard; the first set rate is less than the second set rate.

[0136] In one embodiment, the peak-shaving device of the cogeneration unit further includes a fourth determination module, which is specifically configured to: after the heat storage regulating valve is opened, when the electric load dispatching instruction issued by the power grid dispatching system to the cogeneration unit changes, return to executing the method of determining the heat source heating amount of the preset area in the current unit time based on the heating steam information of the heating network, until the supply-demand deviation is no greater than the set deviation threshold, and then close the heat storage regulating valve to end the heat storage mode of the heating network heating system.

[0137] In one embodiment, the heating scene information includes a thermal index of the building heating area, a heating area, a calculated indoor temperature, and a calculated outdoor temperature for heating. The determination module 420 determines the heat demand of the heat users in the preset area in the current unit time based on the heating scene information and the predicted outdoor temperature sequence, including: determining the outdoor average temperature of the preset area in the current unit time based on the predicted outdoor temperature sequence; calculating the difference between the indoor calculated temperature and the outdoor average temperature to obtain a first difference corresponding to the current unit time, and calculating the difference between the indoor calculated temperature and the heated outdoor calculated temperature to obtain a second difference; calculating the product of the thermal index of the building heating area and the heating area to obtain the building heat demand, and calculating the ratio of the first difference corresponding to the current unit time to the second difference to obtain the heat demand ratio corresponding to the current unit time; determining the product of the building heat demand and the heat demand ratio as the heat demand of the heat users in the preset area in the current unit time.

[0138] In one embodiment, the peak-shaving device of the cogeneration unit also includes a display module, which is specifically used to: after opening the heat storage regulating valve, establish a heat network heating model of the preset area based on the heat network topology structure, heat network attribute information and heat user building attribute information of the preset area; and display the heat network heating model.

[0139] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional modules is used as an example for illustration. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the functional modules described above can refer to the corresponding process in the aforementioned method embodiment and will not be repeated here.

[0140] The peak-shaving device for a cogeneration unit provided in this embodiment can be applied to the peak-shaving method for a cogeneration unit provided in any of the above embodiments, and has corresponding functions and beneficial effects.

[0141] Figure 5 It is a structural diagram of an electronic device provided in an embodiment of the present application. Figure 5 A block diagram of an exemplary electronic device 11 suitable for implementing embodiments of the present application is shown. Figure 5 The electronic device 11 shown is only an example and should not bring any limitation to the functions and scope of use of this embodiment.

[0142] like Figure 5 As shown, electronic device 11 is implemented as a general-purpose computing electronic device. Components of electronic device 11 may include, but are not limited to, one or more processors or processing units 16, system memory 28, and a bus 18 connecting various system components (including system memory 28 and processing unit 16).

[0143] Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, or a local bus using any of a variety of bus architectures. Examples of these architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MAC) bus, an Enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.

[0144] The electronic device 11 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the electronic device 11, including volatile and non-volatile media, removable and non-removable media.

[0145] The system memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The electronic device 11 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be configured to read and write non-removable, non-volatile magnetic media ( Figure 5Not shown, often called a "hard drive"). Although Figure 5 Not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk"), and an optical drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The system memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of various embodiments of the present application.

[0146] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in system memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may include an implementation of a network environment. Program modules 42 generally implement the functions and / or methods of the embodiments described herein.

[0147] The electronic device 11 may also communicate with one or more external devices 14 (e.g., a keyboard, a pointing device, a display 24, etc.), one or more devices that enable a user to interact with the electronic device 11, and / or any device that enables the electronic device 11 to communicate with one or more other computing devices (e.g., a network card, a modem, etc.). Such communication may be performed via an input / output (I / O) interface 22. Furthermore, the electronic device 11 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 20.

[0148] like Figure 5 As shown, the network adapter 20 communicates with other modules of the electronic device 11 via the bus 18. Figure 5 Not shown, other hardware and / or software modules may be used in conjunction with the electronic device 11, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0149] The processing unit 16 executes various functional applications and page displays by running programs stored in the system memory 28, such as implementing a peak-shaving method for a cogeneration unit provided in any embodiment of the present application.

[0150] An embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, a peak-shaving method for a cogeneration unit, for example, provided in any embodiment of the present application, is implemented.

[0151] The computer storage medium of this embodiment can adopt any combination of one or more computer-readable media. Computer-readable media can be computer-readable signal media or computer-readable storage media. Computer-readable storage media can be, for example, but not limited to: electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or components, or any combination thereof. More specific examples (non-exhaustive list) of computer-readable storage media include: electrical connections with one or more wires, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROMs), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this document, computer-readable storage media can be any tangible medium containing or storing a program that can be used by an instruction execution system, device or device or used in combination with it.

[0152] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0153] Program code embodied on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0154] The computer program code for performing the operations of the present application can be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0155] Those skilled in the art will appreciate that the modules or steps of the present application described above can be implemented using a general-purpose computing device. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they can be implemented using program code executable by a computer device, so that they can be stored in a storage device and executed by the computing device. Alternatively, they can be fabricated into separate integrated circuit modules, or multiple modules or steps can be fabricated into a single integrated circuit module for implementation. Thus, the present application is not limited to any specific combination of hardware and software.

[0156] In addition, the acquisition, storage, use, and processing of data in the technical solution of this application comply with relevant laws and regulations.

[0157] Note that the above are only preferred embodiments of the present application and the technical principles employed. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments and may include more other equivalent embodiments without departing from the inventive concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A peak regulation method for a combined heat and power unit, characterized in that: A control device applied to a heat network heating system, the heat network heating system further comprising a heat network first station and a secondary heat exchange station, the heat network first station and the secondary heat exchange station being connected via a primary pipe network, a heat storage regulating valve being installed between a primary water supply pipe network and a primary return water pipe network of the primary pipe network, the method comprising: Obtaining heating scenario information of heat users in a preset area, a predicted outdoor temperature sequence of the preset area within a current unit time, and heating network heating steam information extracted from a cogeneration unit by a heating network heating system in the preset area within the current unit time; Determine the heat demand of the heat user in the preset area in the current unit time based on the heating scene information and the predicted outdoor temperature sequence, and determine the heat supply heat of the heat source in the preset area in the current unit time based on the heating steam information of the heating network; The supply-demand deviation is determined based on the heat demand of the heat user and the heat supply of the heat source, and when the supply-demand deviation is greater than the set deviation threshold, the heat storage regulating valve is opened to start the heat storage mode of the heat network heating system and to use the heat stored in the heat storage mode of the heat network heating system to supply heat when the heat demand of the heat user is greater than the heat supply of the heat source.

2. The peak-shaving method for a cogeneration unit according to claim 1, characterized in that: After determining the heat demand of the heat user in the preset area in the current unit time based on the heating scene information and the predicted outdoor temperature sequence, the method further includes: Determining whether the power generation unit is in a peak power load phase based on a power load dispatch instruction issued by a power grid dispatch system to the cogeneration unit; When it is determined that the electric load is at the peak stage, the method of determining the heat source heating quantity of the preset area in the current unit time based on the heating steam information of the heating network is triggered; When it is determined that the system is in the peak load regulation stage, the heat release mode is started to supply heat by utilizing the heat stored in the heat storage mode of the heat supply system of the heat network.

3. The peak-shaving method for a cogeneration unit according to claim 2, characterized in that: After starting the heat release mode, it also includes: When the outlet temperature of the first station of the heating network is not greater than the first set temperature threshold, the heat release mode is terminated; Alternatively, when the electric load dispatch instruction changes, the method of determining the heat source heating quantity for the preset area in the current unit time based on the heating steam information of the heating network is triggered.

4. The peak-shaving method for a cogeneration unit according to claim 1, characterized in that: Before determining the supply-demand deviation according to the heat user's required heat quantity and the heat source's supplied heat quantity, the method further includes: When the outlet temperature of the first station of the heating network is greater than the second set temperature threshold, the circulating water flow rate is increased with the temperature rise rate not exceeding the first set rate as the adjustment standard; When the outlet temperature of the first station of the heating network is not greater than the second set temperature threshold, the circulating water flow and circulating water temperature are increased with the temperature rise rate not exceeding the second set rate as the adjustment standard; the first set rate is less than the second set rate.

5. The peak-shaving method for a cogeneration unit according to claim 1, characterized in that: After opening the heat storage regulating valve, the method further includes: When the electric load dispatching instruction issued by the power grid dispatching system to the cogeneration unit changes, the execution returns to the method of determining the heat source heating amount of the preset area in the current unit time based on the heating steam information of the heating network, until the supply and demand deviation is no more than the set deviation threshold, and then the heat storage regulating valve is closed to end the heat storage mode of the heating network heating system.

6. The peak regulation method of a cogeneration unit according to claim 1, characterized in that: The heating scenario information includes a building heating area heat index, a heating area, a calculated indoor temperature, and a calculated outdoor temperature for heating. The determining of the heat demand of the heat user in the preset area in the current unit time based on the heating scenario information and the predicted outdoor temperature sequence includes: Determining the average outdoor temperature of the preset area in the current unit time based on the predicted outdoor temperature sequence; Calculating the difference between the indoor calculated temperature and the outdoor average temperature to obtain a first difference corresponding to the current unit time, and calculating the difference between the indoor calculated temperature and the heating outdoor calculated temperature to obtain a second difference; Calculating the product of the building heating area heat index and the heating area to obtain the building heat demand, and calculating the ratio of the first difference corresponding to the current unit time to the second difference to obtain the heat demand ratio corresponding to the current unit time; The product of the building heat demand and the heat demand ratio is determined as the heat demand of the heat users in the preset area in the current unit time.

7. The peak-shaving method for a cogeneration unit according to claim 1, characterized in that: After opening the heat storage regulating valve, the method further includes: Establishing a heating network model for the preset area based on the heating network topology, heating network attribute information, and heat user building attribute information of the preset area; The heating network heating model is displayed.

8. A peak-shaving device for a combined heat and power unit, characterized in that: A control device for a heat network heating system, wherein the heat network heating system further comprises a heat network first station and a secondary heat exchange station, wherein the heat network first station and the secondary heat exchange station are connected via a primary pipe network, and a heat storage regulating valve is installed between the primary water supply pipe network and the primary return pipe network of the primary pipe network, wherein the device comprises: An acquisition module is configured to acquire heating scenario information of heat users in a preset area, a predicted outdoor temperature sequence of the preset area within a current unit time, and heating network heating steam information extracted from a cogeneration unit by a heating network heating system in the preset area within the current unit time; a determination module, configured to determine the heat demand of heat users in the preset area in the current unit time based on the heating scenario information and the predicted outdoor temperature sequence, and to determine the heat supply heat of the heat source in the preset area in the current unit time based on the heating steam information of the heating network; The control module is used to determine the supply-demand deviation based on the heat demand of the heat user and the heat supply of the heat source, and when the supply-demand deviation is greater than the set deviation threshold, open the heat storage regulating valve to start the heat storage mode of the heat network heating system and use the heat stored in the heat storage mode of the heat network heating system to supply heat when the heat demand of the heat user is greater than the heat supply of the heat source.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the peak-shaving method of the cogeneration unit described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the peak regulation method for a cogeneration unit as claimed in any one of claims 1 to 7 is implemented.

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