Adjusting method and device for increasing peak power output of heat supply unit

Abstract

The invention provides an adjusting method and device for enhancing peak power output of a heat supply unit, and belongs to the field of heat supply units. The method comprises the steps of determining corresponding unit stable output power in a low-pressure cylinder zero-output heat supply mode in a daytime period based on output power characteristic functions under different heating steam extraction flows in a low-pressure cylinder zero-output heat supply mode of a heat supply unit and the maximum heating steam extraction flow in other daytime periods except a late peak period; based on the maximum output characteristic function under different heating steam extraction flows in the extraction condensing heat supply mode of the heat supply unit and the heat supply steam extraction flow in the late peak period, the unit peak maximum output in the extraction condensing heat supply mode in the late peak period is determined; and an adjusting strategy is determined based on the corresponding unit stable output power under the low-pressure cylinder zero output heat supply mode in the daytime period, the unit peak maximum output power under the extraction condensing heat supply mode in the late peak period and the increasing value of the unit peak maximum output power in the late peak period. The peak maximum output capacity of the heat supply unit can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heating units, and in particular to a method and a device for regulating a heating unit to enhance peak power output. Background Art

[0002] With the large-scale access of new energy sources to the grid, the peak load support role of power generation units in the grid has become more prominent. In some areas, most power generation units also undertake the task of external heat supply.

[0003] While providing heat and electricity, the peak maximum power output of the heating unit will be affected by the heat supply. The greater the heat supply, the lower the peak maximum power output of the unit will be. In the past, due to the unilateral emphasis on heating safety, the power load scheduling of the heating unit was carried out in the way of determining the output based on the maximum heat supply, which often resulted in insufficient peak output of the unit and the peak load regulation capacity of the heating unit was not fully utilized.

[0004] The current maximum power output capacity of heating units during the peak hours of electricity consumption during the heating period is relatively low, especially under extreme weather conditions. The heating network has a large thermal inertia during operation. How to utilize the heat storage characteristics of the heating network and the heating capacity of the heating units under different heating operation modes to improve the peak maximum power output capacity of the heating units has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The embodiment of the present invention provides a method and device for regulating the peak power output of a heating unit to solve the problem that the peak maximum power output capacity of the current heating unit is low during the peak power consumption period of the heating period.

[0006] In a first aspect, an embodiment of the present invention provides a method for regulating a heating unit to enhance peak power output, comprising:

[0007] Based on the electric output characteristic function of the heating unit under the zero-output heating mode of the low-pressure cylinder at different heating extraction steam flow rates, and the maximum heating extraction steam flow rate during the daytime periods except the evening peak period, the corresponding stable electric output of the unit under the zero-output heating mode of the low-pressure cylinder during the daytime period is determined;

[0008] Based on the maximum output characteristic function of the heating unit under the extraction condensing heating mode at different heating extraction steam flow rates, and the heating extraction steam flow rate during the evening peak period, determine the peak maximum electrical output of the unit under the extraction condensing heating mode during the evening peak period, and determine the increase value of the peak maximum electrical output of the unit during the evening peak period;

[0009] Based on the corresponding stable electrical output of the unit under the low-pressure cylinder zero-output heating mode during the daytime, the peak maximum electrical output of the unit under the extraction and condensing heating mode during the evening peak period, and the increased value of the peak maximum electrical output of the unit during the evening peak period, the regulation strategy for enhancing the peak electrical output of the heating unit is determined.

[0010] In a possible implementation, determining the increase value of the peak maximum power output of the unit during the evening peak period includes:

[0011] Determine the average value of the peak maximum power output during the evening peak period when the heating unit does not adopt the enhanced peak power output regulation strategy;

[0012] Based on the peak maximum electrical output of the unit under the extraction and condensing heating mode during the evening peak period and the average peak maximum electrical output of the heating unit during the evening peak period, the increase value of the peak maximum electrical output of the unit during the evening peak period is determined.

[0013] In a possible implementation, the maximum heating steam extraction flow Fn during the daytime hours except the evening peak hours is rj The method to determine is:

[0014] Fn rj =Fn ave +Q qr / (△t rj -△tt-△t wf );

[0015] Among them, △t wf is the evening peak time, Q qr is the overall heating shortage during the evening peak period, △tt is the time required for the adjustment and reduction of the heating extraction steam flow during the evening peak period, △trj is the duration of the daytime period, and Fn ave It is the average steam extraction flow rate for heating during the daytime.

[0016] In a possible implementation, the method for determining the time △tt required for adjusting and reducing the heating extraction steam flow rate during the evening peak period is:

[0017] △tt=△F / FS;

[0018] Overall heating shortage during evening peak hours Q qr The method to determine is:

[0019] Q qr =△F×(△tt+△t wf );

[0020] Among them, △F is the adjustment reduction of the heating extraction steam flow rate during the evening peak period compared with the average heating extraction steam flow rate, and FS is the adjustment change rate of the heating extraction steam flow rate.

[0021] In a possible implementation, the method for determining the adjustment change rate FS of the heating extraction steam flow rate is:

[0022] FS = Fw × 4.186 × TS / 2550;

[0023] Among them, TS is the temperature rise rate of the heating network, and Fw is the circulating water flow rate of the heating network.

[0024] In a possible implementation, the heating extraction steam flow Fn during the evening peak period is wf The method to determine is:

[0025] Fn wf =Fn ave -△F;

[0026] Among them, △F is the adjustment reduction of the heating steam extraction flow rate during the evening peak period compared with the average heating steam extraction flow rate, Fn ave It is the average steam extraction flow rate for heating during the daytime.

[0027] In a possible implementation, the process of determining the maximum output characteristic function of the heating unit under different heating steam extraction flow rates in the extraction condensing heating mode is as follows:

[0028] When the steam inlet of the steam turbine is maintained at the designed steam inlet flow rate under the maximum continuous output condition, the maximum output value of the unit under different heating extraction steam flow rates is obtained;

[0029] Based on the maximum output value of the unit under different heating extraction steam flow rates, the maximum output characteristic function of the heating unit under different heating extraction steam flow rates in the extraction and condensing heating mode is fitted.

[0030] In a possible implementation, the process of determining the electric output characteristic function under different heating steam extraction flow rates in the zero-output heating mode of the low-pressure cylinder of the heating unit is as follows:

[0031] When the steam inlet flow rate of the low-pressure cylinder of the steam turbine is controlled at the minimum cooling steam volume determined by the manufacturer, the unit power output value under different heating steam extraction flow rates is obtained;

[0032] Based on the unit's electrical output value under different heating extraction steam flow rates, the electrical output characteristic function of the heating unit under different heating extraction steam flow rates in the zero-output heating mode of the low-pressure cylinder is fitted.

[0033] In a possible implementation, based on the corresponding stable power output of the unit under the low-pressure cylinder zero-output heating mode during the daytime, the peak maximum power output of the unit under the extraction and condensation heating mode during the evening peak period, and the increase value of the peak maximum power output of the unit during the evening peak period, the regulation strategy for enhancing the peak power output of the heating unit is determined, including:

[0034] When the heating unit is in the daytime period, the heating mode of zero output of the low-pressure cylinder is adopted to control the operation of the unit based on the corresponding stable electrical output of the unit under the heating mode of zero output of the low-pressure cylinder during the daytime period;

[0035] When the heating unit is in the transition period from the daytime to the evening peak, based on the corresponding stable power output of the unit under the low-pressure cylinder zero-output heating mode during the daytime and the increased value of the unit's peak maximum power output during the evening peak, the unit's heating mode is controlled to switch from the low-pressure cylinder zero-output heating mode to the extraction and condensing heating mode, and the heating extraction steam flow is adjusted from the heating extraction steam flow during the daytime to the heating extraction steam flow during the evening peak; the unit output is controlled to be adjusted from the corresponding stable power output of the unit under the low-pressure cylinder zero-output heating mode during the daytime to the unit's peak maximum power output under the extraction and condensing heating mode during the evening peak;

[0036] When the heating unit is in the transition period from the peak period to the evening peak, the extraction condensing heating mode is used to control the unit operation based on the unit's peak maximum electrical output under the extraction condensing heating mode during the evening peak period.

[0037] In a second aspect, an embodiment of the present invention provides a regulating device for enhancing peak power output of a heating unit, comprising:

[0038] The first determination module is used to determine the corresponding stable electric output of the unit under the low-pressure cylinder zero output heating mode during the daytime period based on the electric output characteristic function under different heating steam extraction flow rates under the low-pressure cylinder zero output heating mode of the heating unit, and the maximum heating steam extraction flow rate during the daytime period except the evening peak period;

[0039] The second determination module is used to determine the peak maximum electrical output of the unit under the extraction and condensing heating mode during the evening peak period based on the maximum output characteristic function of the heating unit under different heating extraction steam flow rates under the extraction and condensing heating mode, and the heating extraction steam flow rate during the evening peak period, and determine the increase value of the peak maximum electrical output of the unit during the evening peak period;

[0040] A determination strategy module is used to determine the regulation strategy for enhancing the peak power output of the heating unit based on the corresponding stable power output of the unit under the low-pressure cylinder zero-output heating mode during the daytime, the peak maximum power output of the unit under the extraction and condensing heating mode during the evening peak period, and the increase value of the peak maximum power output of the unit during the evening peak period.

[0041] The embodiment of the present invention provides a method and device for regulating the peak power output of a heating unit. The method and device determine the corresponding stable power output of the unit under the low-pressure cylinder zero-output heating mode during the daytime period based on the power output characteristic function under different heating extraction steam flow rates under the low-pressure cylinder zero-output heating mode of the heating unit, and the maximum heating extraction steam flow rate during the daytime period except the evening peak period. Then, based on the maximum output characteristic function under different heating extraction steam flow rates under the extraction-condensing heating mode of the heating unit, and the heating extraction steam flow rate during the evening peak period, the peak maximum power output of the unit under the extraction-condensing heating mode during the evening peak period is determined, and the increase value of the peak maximum power output of the unit during the evening peak period is determined. Finally, based on the corresponding stable power output of the unit under the low-pressure cylinder zero-output heating mode during the daytime period, the peak maximum power output of the unit under the extraction-condensing heating mode during the evening peak period, and the increase value of the peak maximum power output of the unit during the evening peak period, the regulation strategy for enhancing the peak power output of the heating unit is determined. Based on the operating constraints of the heating network, the increase in the peak maximum electrical output of the heating unit under the condition of adjusting the heating extraction steam flow rate during peak electricity consumption periods is calculated, thereby effectively improving the peak maximum electrical output capacity of the heating unit during peak electricity consumption periods and effectively improving the peak-shaving flexibility and supply support capabilities of the heating unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 is a flow chart for implementing a method for regulating a heating unit to enhance peak power output provided by an embodiment of the present invention;

[0044] Figure 2 It is a structural flow chart of a method for regulating the peak power output of a heating unit provided by an embodiment of the present invention;

[0045] Figure 3 It is a schematic diagram of the structure of a regulating device for enhancing the peak power output of a heating unit provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0046] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0047] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below in conjunction with the accompanying drawings.

[0048] Figure 1 and Figure 2 The flowchart of the method for regulating the peak power output of a heating unit provided by an embodiment of the present invention is described in detail as follows:

[0049] S110. Based on the electric output characteristic function of the heating unit under the zero-output heating mode of the low-pressure cylinder at different heating extraction steam flow rates, and the maximum heating extraction steam flow rate during the daytime periods except the evening peak period, determine the corresponding stable electric output of the unit under the zero-output heating mode of the low-pressure cylinder during the daytime period.

[0050] In some embodiments, the process of determining the electric output characteristic function under different heating steam extraction flow rates in the zero-output heating mode of the low-pressure cylinder of the heating unit is as follows:

[0051] Firstly, when the steam inlet flow rate to the low-pressure cylinder of the steam turbine is controlled at the minimum cooling steam volume determined by the manufacturer, the electrical output value of the unit under different heating extraction steam flow rates is obtained.

[0052] Then, based on the unit's electrical output value under different heating extraction steam flow rates, the electrical output characteristic function under different heating extraction steam flow rates in the heating mode with zero output of the low-pressure cylinder of the heating unit was fitted.

[0053] In this embodiment, the boundary condition of the zero-output heating mode of the low-pressure cylinder of the heating unit is that the steam inlet flow rate of the low-pressure cylinder of the steam turbine is controlled at the minimum cooling steam volume determined by the manufacturer, and the unit electrical output values ​​under different heating steam extraction flows under this condition are summarized in a list form and fitted into an electrical output characteristic function. The form of the electrical output characteristic function is:

[0054] P2=a2+b2×Fn.

[0055] In some embodiments, the maximum heating steam flow rate Fn during the daytime except the evening peak period is rj for:

[0056] Fn rj =Fn ave +Q qr / (△t rj -△tt-△t wf );

[0057] Among them, △t wf is the evening peak time, Q qr is the overall heating shortage during the evening peak period, △tt is the time required for the adjustment and reduction of the heating extraction steam flow during the evening peak period, △t rj is the duration of the daytime period (8:00 a.m. to the end of the evening peak period), Fnave It is the average steam extraction flow rate for heating during the daytime.

[0058] In some embodiments, the present invention selects Fn ave is the average heating steam extraction flow rate of the heating unit during the daytime within three days. The calculation process is:

[0059]

[0060] The daytime period is from 8:00 a.m. to the end of the evening peak period.

[0061] The calculation process of the average heating extraction steam flow rate of a single-day heating unit during the daytime period (8:00 a.m. to the end of the evening peak period) is as follows:

[0062]

[0063] In the formula, F ni is the i-th heating steam extraction flow rate at an interval of 15 minutes, in t / h; n is the total heating steam extraction flow rate during the daytime; F nd(j) It is the average heating steam extraction flow rate of the heating unit during the daytime period on the jth day.

[0064] The total steam extraction flow TFn of the heating unit for heating during the day is:

[0065] TFn=Fn ave ×△t rj .

[0066] △t rj It is the duration of the daytime period (8:00 a.m. to the end of the evening peak period).

[0067] In this embodiment, the method for determining the time Δtt required for adjusting and reducing the heating extraction steam flow rate during the evening peak period is:

[0068] △tt=△F / FS;

[0069] Overall heating shortage during evening peak hours Q qr The method to determine is:

[0070] Q qr =△F×(△tt+△t wf );

[0071] Among them, △F is the adjustment reduction of the heating extraction steam flow rate during the evening peak period compared with the average heating extraction steam flow rate, and FS is the adjustment change rate of the heating extraction steam flow rate.

[0072] In this embodiment, the method for determining the adjustment change rate FS of the heating extraction steam flow rate is:

[0073] FS = Fw × 4.186 × TS / 2550;

[0074] Among them, TS is the temperature rise rate of the heating network, and Fw is the circulating water flow rate of the heating network.

[0075] In this embodiment, according to the electrical output characteristic function P2=a2+b2×Fn under different heating steam extraction flow rates in the low-pressure cylinder zero-output heating mode of the heating unit, the maximum heating steam extraction flow rate during the daytime periods except the evening peak period is substituted into the function, and the corresponding stable electrical output of the unit under the low-pressure cylinder zero-output heating mode during the daytime period can be calculated.

[0076] S120. Based on the maximum output characteristic function of the heating unit under the extraction-condensing heating mode at different heating extraction steam flow rates, and the heating extraction steam flow rate during the evening peak period, determine the peak maximum electrical output of the unit under the extraction-condensing heating mode during the evening peak period, and determine the increase value of the peak maximum electrical output of the unit during the evening peak period.

[0077] In some embodiments, the process of determining the maximum output characteristic function under different heating steam extraction flow rates in the extraction condensation heating mode of the heating unit is as follows:

[0078] First, when the steam inlet of the steam turbine is maintained at the designed steam inlet flow rate under the maximum continuous output condition, the maximum output value of the unit under different heating steam extraction flow rates can be obtained. Then, based on the maximum output value of the unit under different heating steam extraction flow rates, the maximum output characteristic function of the heating unit under different heating steam extraction flow rates under the extraction and condensing heating mode can be fitted.

[0079] In this embodiment, the boundary condition of the maximum output characteristic curve of the heating unit is that the turbine steam inlet volume is maintained at the designed steam inlet flow rate under the maximum continuous output (TMCR) condition, and the maximum output values ​​of the unit under different heating steam extraction flow rates under this condition are summarized in a list form and fitted into the maximum output characteristic function Pmax1=a1+b1×Fn.

[0080] In some embodiments, the heating extraction steam flow rate Fn during the evening peak period wf The determination process is:

[0081] Fn wf =Fn ave -△F;

[0082] Among them, △F is the adjustment reduction of the heating steam extraction flow rate during the evening peak period compared with the average heating steam extraction flow rate, Fn ave It is the average steam extraction flow rate for heating during the daytime.

[0083] In some embodiments, according to the maximum output characteristic function Pmax1=a1+b1×Fn of the heating unit under the extraction and condensation heating mode, the heating extraction steam flow rate during the evening peak period is substituted into the function, and the peak maximum power output Pn of the unit under the extraction and condensation heating mode during the evening peak period can be calculated. wf .

[0084] In some embodiments, the process of determining the increase value of the peak maximum power output of the unit during the evening peak period is as follows:

[0085] First, the average peak maximum power output of the heating unit during the evening peak period is determined when the enhanced peak power output regulation strategy is not adopted. Then, based on the peak maximum power output of the unit under the extraction and condensation heating mode during the evening peak period and the average peak maximum power output of the heating unit during the evening peak period, the increase value of the peak maximum power output of the unit during the evening peak period is determined.

[0086] In this embodiment, the increase in the maximum peak power output of the unit during the evening peak period is calculated as follows:

[0087] △Pn wf =Pn wf -Pn wfave ;

[0088] Pn wfave Pn is the average value of the peak maximum power output of the heating unit during the evening peak period in the past three days. wf It is the maximum power output of the unit during the evening peak period.

[0089] S130. Determine the regulation strategy for enhancing the peak power output of the heating unit based on the corresponding stable power output of the unit under the low-pressure cylinder zero-output heating mode during the daytime, the peak maximum power output of the unit under the extraction and condensation heating mode during the evening peak period, and the increase value of the peak maximum power output of the unit during the evening peak period.

[0090] In some embodiments, during the daytime period (except the evening peak period and the transition period), based on the corresponding stable power output of the unit under the low-pressure cylinder zero output heating mode during the daytime period, the low-pressure cylinder zero output heating mode will be used to control the operation of the unit. The daytime heating steam extraction flow rate is Fn rj .

[0091] During the transition period from the daytime to the evening peak, based on the stable power output of the unit corresponding to the zero-output heating mode of the low-pressure cylinder during the daytime and the increase in the peak power output of the unit during the evening peak, the heating extraction steam flow rate of the unit is adjusted to FS, and the heating extraction steam flow rate is changed from the daytime heating extraction steam flow rate Fn rj Adjustment changes to the heating steam extraction flow Fn during the evening peak period wfThe unit output is adjusted from the stable power output of the unit corresponding to the low-pressure cylinder zero-output heating mode during the daytime to the peak maximum power output of the unit under the extraction and condensation heating mode during the evening peak period.

[0092] During the transition period from the evening peak to the evening peak, based on the peak maximum power output of the unit under the extraction condensation heating mode during the evening peak, the extraction condensation heating mode is used to control the operation of the unit. The extraction steam flow rate Fn for heating during the evening peak is wf At this time, the peak maximum power output of the unit is Pn wf .

[0093] The regulation method provided by the present invention determines the corresponding stable electrical output of the unit under the low-pressure cylinder zero-output heating mode during the daytime period based on the electrical output characteristic function under different heating extraction steam flow rates under the low-pressure cylinder zero-output heating mode of the heating unit, and the maximum heating extraction steam flow rate during the daytime periods except the evening peak period. Then, based on the maximum output characteristic function under different heating extraction steam flow rates under the extraction-condensing heating mode of the heating unit, and the heating extraction steam flow rate during the evening peak period, the peak maximum electrical output of the unit under the extraction-condensing heating mode during the evening peak period is determined, as well as the increase value of the peak maximum electrical output of the unit during the evening peak period. Finally, based on the corresponding stable electrical output of the unit under the low-pressure cylinder zero-output heating mode during the daytime period, the peak maximum electrical output of the unit under the extraction-condensing heating mode during the evening peak period, and the increase value of the peak maximum electrical output of the unit during the evening peak period, the regulation strategy for enhancing the peak electrical output of the heating unit is determined. Based on the operating constraints of the heating network, the increase in the peak maximum electrical output of the heating unit under the condition of adjusting the heating extraction steam flow rate during peak electricity consumption periods is calculated, thereby effectively improving the peak maximum electrical output capacity of the heating unit during peak electricity consumption periods and effectively improving the peak-shaving flexibility and supply support capabilities of the heating unit.

[0094] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0095] The following is an embodiment of the device of the present invention. For details not described in detail therein, reference may be made to the corresponding method embodiment described above.

[0096] Figure 3 The schematic diagram of the structure of the regulating device for enhancing the peak power output of a heating unit provided by an embodiment of the present invention is shown. For the convenience of explanation, only the part related to the embodiment of the present invention is shown, which is described in detail as follows:

[0097] like Figure 3 As shown, a regulating device 300 for enhancing peak power output of a heating unit comprises:

[0098] The first determination module 310 is used to determine the corresponding stable electric output of the unit under the low-pressure cylinder zero output heating mode during the daytime period based on the electric output characteristic function of the heating unit under different heating steam extraction flow rates under the low-pressure cylinder zero output heating mode and the maximum heating steam extraction flow rate during the daytime period except the evening peak period;

[0099] The second determination module 320 is used to determine the peak maximum power output of the unit under the extraction and condensing heating mode during the evening peak period based on the maximum output characteristic function of the heating unit under different heating extraction steam flow rates under the extraction and condensing heating mode, and the heating extraction steam flow rate during the evening peak period, and determine the increase value of the peak maximum power output of the unit during the evening peak period;

[0100] Determine the strategy module 330, which is used to determine the regulation strategy for enhancing the peak power output of the heating unit based on the corresponding stable power output of the unit under the low-pressure cylinder zero-output heating mode during the daytime period, the peak maximum power output of the unit under the extraction and condensation heating mode during the evening peak period, and the increase value of the peak maximum power output of the unit during the evening peak period.

[0101] In a possible implementation, the second determination module 320 is used to determine the average value of the peak maximum power output during the evening peak period when the heating unit does not adopt the enhanced peak power output regulation strategy;

[0102] Based on the peak maximum electrical output of the unit under the extraction and condensing heating mode during the evening peak period and the average peak maximum electrical output of the heating unit during the evening peak period, the increase value of the peak maximum electrical output of the unit during the evening peak period is determined.

[0103] In a possible implementation, the maximum heating steam extraction flow Fn during the daytime hours except the evening peak hours is rj The method to determine is:

[0104] Fn rj =Fn ave +Q qr / (△t rj -△tt-△t wf );

[0105] Among them, △t wf is the evening peak time, Q qr is the overall heating shortage during the evening peak period, △tt is the time required for the adjustment and reduction of the heating extraction steam flow during the evening peak period, △trj is the duration of the daytime period, and Fn ave It is the average steam extraction flow rate for heating during the daytime.

[0106] In a possible implementation, the method for determining the time △tt required for adjusting and reducing the heating extraction steam flow rate during the evening peak period is:

[0107] △tt=△F / FS;

[0108] Overall heating shortage during evening peak hours Q qr The method to determine is:

[0109] Q qr =△F×(△tt+△t wf );

[0110] Among them, △F is the adjustment reduction of the heating extraction steam flow rate during the evening peak period compared with the average heating extraction steam flow rate, and FS is the adjustment change rate of the heating extraction steam flow rate.

[0111] In a possible implementation, the method for determining the adjustment change rate FS of the heating extraction steam flow rate is:

[0112] FS = Fw × 4.186 × TS / 2550;

[0113] Among them, TS is the temperature rise rate of the heating network, and Fw is the circulating water flow rate of the heating network.

[0114] In a possible implementation, the heating extraction steam flow Fn during the evening peak period is wf The method to determine is:

[0115] Fn wf =Fn ave -△F;

[0116] Among them, △F is the adjustment reduction of the heating steam extraction flow rate during the evening peak period compared with the average heating steam extraction flow rate, Fn ave It is the average steam extraction flow rate for heating during the daytime.

[0117] In a possible implementation, the second determination module 320 is used to obtain the maximum output value of the unit under different heating extraction steam flow rates when the steam inlet flow of the steam turbine is maintained at the designed steam inlet flow rate under the maximum continuous output condition;

[0118] Based on the maximum output value of the unit under different heating extraction steam flow rates, the maximum output characteristic function of the heating unit under different heating extraction steam flow rates in the extraction and condensing heating mode is fitted.

[0119] In a possible implementation, the first determination module 310 is used to obtain the unit power output value under different heating extraction steam flow rates when the steam inlet flow rate of the low-pressure cylinder of the steam turbine is controlled at the minimum cooling steam flow rate determined by the manufacturer;

[0120] Based on the unit's electrical output value under different heating extraction steam flow rates, the electrical output characteristic function of the heating unit under different heating extraction steam flow rates in the zero-output heating mode of the low-pressure cylinder is fitted.

[0121] In a possible implementation, the strategy module 330 is used to determine that when the heating unit is in the daytime period, based on the corresponding stable electrical output of the unit under the low-pressure cylinder zero-output heating mode in the daytime period, the low-pressure cylinder zero-output heating mode will be adopted;

[0122] When the heating unit is in the transition period from the daytime to the evening peak, based on the corresponding stable power output of the unit under the low-pressure cylinder zero-output heating mode during the daytime and the increased value of the unit's peak maximum power output during the evening peak, the unit's heating mode is controlled to switch from the low-pressure cylinder zero-output heating mode to the extraction and condensing heating mode, and the heating extraction steam flow is adjusted from the heating extraction steam flow during the daytime to the heating extraction steam flow during the evening peak; the unit output is controlled to be adjusted from the corresponding stable power output of the unit under the low-pressure cylinder zero-output heating mode during the daytime to the unit's peak maximum power output under the extraction and condensing heating mode during the evening peak;

[0123] When the heating unit is in the transition period from the peak period to the evening peak, the extraction condensation heating mode will be adopted based on the unit's peak maximum electrical output under the extraction condensation heating mode during the evening peak period.

[0124] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0125] Those of ordinary skill in the art will appreciate that the templates, units, and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0126] If the module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, it can implement the steps of the above-mentioned embodiments of the method for regulating the peak power output of each heating unit. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier signal, telecommunication signal and software distribution medium.

[0127] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for regulating a heating unit to increase peak power output, characterized in that: include: Based on the electric output characteristic function of the heating unit under the zero-output heating mode of the low-pressure cylinder at different heating extraction steam flow rates, and the maximum heating extraction steam flow rate during the daytime periods except the evening peak period, the corresponding stable electric output of the unit under the zero-output heating mode of the low-pressure cylinder during the daytime period is determined; Based on the maximum output characteristic function of the heating unit under the extraction condensing heating mode at different heating extraction steam flow rates, and the heating extraction steam flow rate during the evening peak period, determine the peak maximum electrical output of the unit under the extraction condensing heating mode during the evening peak period, and determine the increase value of the peak maximum electrical output of the unit during the evening peak period; Based on the corresponding stable electrical output of the unit under the low-pressure cylinder zero-output heating mode during the daytime period, the peak maximum electrical output of the unit under the extraction and condensation heating mode during the evening peak period, and the increased value of the peak maximum electrical output of the unit during the evening peak period, the regulation strategy for enhancing the peak electrical output of the heating unit is determined.

2. The method for regulating the peak power output of a heating unit according to claim 1, characterized in that: The determination of the increase in the peak maximum power output of the unit during the evening peak period includes: Determine the average value of the peak maximum power output during the evening peak period when the heating unit does not adopt the enhanced peak power output regulation strategy; Based on the peak maximum electrical output of the unit under the extraction and condensation heating mode during the evening peak period and the average peak maximum electrical output of the heating unit during the evening peak period, the increase value of the peak maximum electrical output of the unit during the evening peak period is determined.

3. The method for regulating the peak power output of a heating unit according to claim 1, characterized in that: The maximum heating steam extraction flow Fn during the daytime except the evening peak period rj The method to determine is: Fn rj =Fn ave +Q qr / (△t rj -△tt-△t wf ); Among them, △t wf is the evening peak time, Q qr is the overall heating shortage during the evening peak period, △tt is the time required for the adjustment and reduction of the heating extraction steam flow during the evening peak period, △trj is the duration of the daytime period, and Fn ave It is the average steam extraction flow rate for heating during the daytime.

4. The method for regulating the peak power output of a heating unit according to claim 3, characterized in that: The method for determining the time △tt required for adjusting and reducing the heating extraction steam flow rate during the evening peak period is: △tt=△F / FS; Overall heating shortage during evening peak hours Q qr The method to determine is: Q qr =△F×(△tt+△t wf ); Among them, △F is the adjustment reduction of the heating extraction steam flow rate during the evening peak period compared with the average heating extraction steam flow rate, and FS is the adjustment change rate of the heating extraction steam flow rate.

5. The method for regulating the peak power output of a heating unit according to claim 4, characterized in that: The method for determining the adjustment change rate FS of the heating extraction steam flow is: FS = Fw × 4.186 × TS / 2550; Among them, TS is the temperature rise rate of the heating network, and Fw is the circulating water flow rate of the heating network.

6. The method for regulating the peak power output of a heating unit according to claim 1, characterized in that: The heating extraction steam flow rate Fn during the evening peak period wf The method to determine is: UN wf =Fn ave -△F; Among them, △F is the adjustment reduction of the heating steam extraction flow rate during the evening peak period compared with the average heating steam extraction flow rate, Fn ave It is the average steam extraction flow rate for heating during the daytime.

7. The method for regulating the peak power output of a heating unit according to any one of claims 1 to 6, characterized in that: The process of determining the maximum output characteristic function of the heating unit under different heating steam extraction flow rates in the extraction condensation heating mode is as follows: When the steam inlet of the steam turbine is maintained at the designed steam inlet flow rate under the maximum continuous output condition, the maximum output value of the unit under different heating extraction steam flow rates is obtained; Based on the maximum output value of the unit under different heating steam extraction flow rates, the maximum output characteristic function of the heating unit under different heating steam extraction flow rates in the extraction and condensing heating mode is fitted.

8. The method for regulating the peak power output of a heating unit according to any one of claims 1 to 6, characterized in that: The process of determining the electric output characteristic function under different heating steam extraction flow rates in the zero-output heating mode of the low-pressure cylinder of the heating unit is as follows: When the steam inlet flow rate of the low-pressure cylinder of the steam turbine is controlled at the minimum cooling steam volume determined by the manufacturer, the unit power output value under different heating steam extraction flow rates is obtained; Based on the electric output value of the unit under different heating steam extraction flow rates, the electric output characteristic function of the heating unit under different heating steam extraction flow rates in the zero-output heating mode of the low-pressure cylinder is fitted.

9. The method for regulating the peak power output of a heating unit according to any one of claims 1 to 6, characterized in that: The regulation strategy for enhancing the peak power output of the heating unit is determined based on the corresponding stable power output of the unit under the low-pressure cylinder zero-output heating mode during the daytime period, the peak maximum power output of the unit under the extraction and condensation heating mode during the evening peak period, and the increase value of the peak maximum power output of the unit during the evening peak period, including: When the heating unit is in the daytime period, based on the corresponding stable electrical output of the unit under the low-pressure cylinder zero-output heating mode during the daytime period, the unit operation is controlled by adopting the low-pressure cylinder zero-output heating mode; When the heating unit is in the transition period from the daytime period to the evening peak period, based on the corresponding stable power output of the unit under the low-pressure cylinder zero-output heating mode during the daytime period and the increased value of the peak maximum power output of the unit during the evening peak period, the heating mode of the unit is controlled to switch from the low-pressure cylinder zero-output heating mode to the extraction and condensing heating mode, and the heating extraction steam flow is adjusted from the heating extraction steam flow during the daytime period to the heating extraction steam flow during the evening peak period; the unit output is controlled to be adjusted from the corresponding stable power output of the unit under the low-pressure cylinder zero-output heating mode during the daytime period to the peak maximum power output of the unit under the extraction and condensing heating mode during the evening peak period; When the heating unit is in the transition period from the peak period to the evening peak period, the extraction condensing heating mode is used to control the operation of the unit based on the peak maximum electrical output of the unit under the extraction condensing heating mode during the evening peak period.

10. A regulating device for increasing the peak power output of a heating unit, characterized in that: include: The first determination module is used to determine the corresponding stable electric output of the unit under the low-pressure cylinder zero output heating mode during the daytime period based on the electric output characteristic function under different heating steam extraction flow rates under the low-pressure cylinder zero output heating mode of the heating unit, and the maximum heating steam extraction flow rate during the daytime period except the evening peak period; The second determination module is used to determine the peak maximum electrical output of the unit under the extraction and condensing heating mode during the evening peak period based on the maximum output characteristic function of the heating unit under different heating extraction steam flow rates under the extraction and condensing heating mode, and the heating extraction steam flow rate during the evening peak period, and determine the increase value of the peak maximum electrical output of the unit during the evening peak period; A determination strategy module is used to determine a regulation strategy for enhancing the peak electrical output of the heating unit based on the corresponding stable electrical output of the unit under the low-pressure cylinder zero-output heating mode during the daytime period, the peak maximum electrical output of the unit under the extraction and condensation heating mode during the evening peak period, and the increased value of the peak maximum electrical output of the unit during the evening peak period.

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