CN113868580B

CN113868580B - Method for determining minimum peak-shaving output of industrial steam supply working condition of extraction condensing heat supply unit

Info

Publication number: CN113868580B
Application number: CN202110962985.6A
Authority: CN
Inventors: 杨海生; 唐广通; 张营; 李�浩; 闫晓沛
Original assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd; State Grid Hebei Energy Technology Service Co Ltd
Current assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd; State Grid Hebei Energy Technology Service Co Ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2024-06-14
Anticipated expiration: 2041-08-20
Also published as: CN113868580A

Abstract

The invention is suitable for the technical field of heating units, and provides a method for determining the minimum peak shaving output of an industrial steam supply working condition of a condensing heating unit, which comprises the following steps: obtaining experimental steam supply and experimental pressure difference obtained by experiments of each industrial steam supply section, and determining a resistance characteristic function of each industrial steam supply section; calculating the pressure difference of each industrial steam supply section under the preset steam supply, and determining the minimum steam extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam supply; initializing main steam flow, and adjusting the current main steam flow based on the difference value between the steam extraction pressure and the minimum steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow to obtain the minimum main steam flow meeting the steam supply requirement; and determining the minimum peak regulation output corresponding to the preset steam supply of the extraction condensing heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement. The invention can obtain more accurate minimum peak shaving output.

Description

Method for determining minimum peak-shaving output of industrial steam supply working condition of extraction condensing heat supply unit

Technical Field

The invention belongs to the technical field of heating units, and particularly relates to a method, a device and a terminal for determining minimum peak shaving output of an industrial steam supply working condition of a condensing heating unit.

Background

At present, the development planning of the thermal power flexible transformation technology of the national energy bureau 2016-2020 is explicitly proposed, and the peak shaving amplitude of the existing thermal power generating unit is improved. The minimum peak shaving output performance of the extraction and condensation heat supply unit is directly related to the operation parameters of the unit for external industrial steam supply under the industrial steam supply working condition, and the minimum peak shaving output performance can be adjusted by adjusting the operation parameters of the extraction and condensation heat supply unit.

However, the peak shaving characteristic curve of the industrial steam supply condition provided by the turbine manufacturer often has great deviation when the actual computer unit has the minimum peak shaving output. Therefore, how to accurately determine the related characteristics of the minimum peak shaving output of the extraction and condensation heat supply unit under the industrial steam supply working condition, and further furthest mine the peak shaving potential of the extraction and condensation heat supply unit under the industrial steam supply working condition, is a great difficulty to be solved in front of the power plant.

Disclosure of Invention

In view of the above, the invention provides a method for determining the minimum peak regulation output of the industrial steam supply working condition of the extraction condensing heat supply unit, so as to solve the problem of low accuracy of the industrial steam supply peak regulation characteristic curve provided by a steam turbine manufacturer.

The first aspect of the embodiment of the invention provides a method for determining the minimum peak shaving output of the industrial steam supply working condition of a condensing heat supply unit, which comprises the following steps:

Obtaining experimental steam supply and experimental pressure difference obtained by experiments of each industrial steam supply section, and determining a resistance characteristic function of each industrial steam supply section according to the experimental steam supply and the experimental pressure difference;

Calculating the pressure difference of each industrial steam supply section under the preset steam supply according to the resistance characteristic function of each industrial steam supply section, and determining the minimum steam extraction pressure of the extraction condensing heat supply unit steam turbine under the preset steam supply based on the preset steam supply, the minimum steam consumption parameter of the user side and the pressure difference of each industrial steam supply section;

initializing main steam flow;

Determining the extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow; adjusting the current main steam flow based on the difference value between the steam extraction pressure and the minimum steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow, and repeating the steps until the minimum main steam flow meeting the steam supply requirement is obtained;

And determining the minimum peak regulation output corresponding to the preset steam supply of the extraction condensing heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement.

A second aspect of the embodiment of the present invention provides a device for determining a minimum peak shaving output under an industrial steam supply condition of a condensing heat supply unit, including:

the characteristic determining module is used for obtaining experimental steam supply and experimental pressure difference obtained by experiments of each industrial steam supply section and determining a resistance characteristic function of each industrial steam supply section according to the experimental steam supply and the experimental pressure difference;

the minimum pressure determining module is used for calculating the pressure difference of each industrial steam supply section under the preset steam supply according to the resistance characteristic function of each industrial steam supply section, and determining the minimum steam extraction pressure of the extraction condensing heat supply unit steam turbine under the preset steam supply based on the preset steam supply, the lowest steam consumption parameter of the user side and the pressure difference of each industrial steam supply section;

The initialization module is used for initializing the main steam flow;

The main steam flow determining module is used for determining the steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow; adjusting the current main steam flow based on the difference value between the steam extraction pressure and the minimum steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow, and repeating the steps until the minimum main steam flow meeting the steam supply requirement is obtained;

And the minimum output determining module is used for determining the minimum peak regulation output corresponding to the preset steam supply of the extraction condensing heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement.

A third aspect of the embodiment of the present invention provides a terminal, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements the steps of the method for determining the minimum peak shaving output of the industrial steam supply condition of the condensing heat supply unit according to any one of the above steps when executing the computer program.

A fourth aspect of the embodiments of the present invention provides a computer readable storage medium storing a computer program, which when executed by a processor implements the steps of a method for determining a minimum peak shaving output for an industrial steam supply condition of a pump condensing heat supply unit according to any one of the above.

Compared with the prior art, the invention has the beneficial effects that:

The method for determining the minimum peak shaving output of the industrial steam supply working condition of the extraction condensing heat supply unit comprises the following steps: obtaining experimental steam supply and experimental pressure difference obtained by experiments of each industrial steam supply section, and determining a resistance characteristic function of each industrial steam supply section according to the experimental steam supply and the experimental pressure difference; calculating the pressure difference of each industrial steam supply section under the preset steam supply according to the resistance characteristic function of each industrial steam supply section, and determining the minimum steam extraction pressure of the extraction condensing heat supply unit steam turbine under the preset steam supply based on the preset steam supply, the minimum steam consumption parameter of the user side and the pressure difference of each industrial steam supply section; initializing main steam flow; determining the extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow; adjusting the current main steam flow based on the difference value between the steam extraction pressure and the minimum steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow, and repeating the steps until the minimum main steam flow meeting the steam supply requirement is obtained; and determining the minimum peak regulation output corresponding to the preset steam supply of the extraction condensing heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement. The minimum steam extraction pressure is determined through the resistance characteristic function of each industrial steam supply section of the extraction condensing heat supply unit, the main steam flow is adjusted through the difference value between the pressure of the steam extraction section of the steam turbine and the minimum steam extraction pressure, the minimum main steam flow meeting the steam supply requirement is obtained, the accurate minimum peak regulation output is calculated based on the main steam flow, and the peak regulation operation performance of the extraction condensing heat supply unit under the industrial steam supply working condition is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of an implementation of a method for determining minimum peak shaving output of an industrial steam supply condition of a condensing heat supply unit provided by an embodiment of the invention;

FIG. 2 is a schematic structural diagram of a device for determining minimum peak shaving output under industrial steam supply conditions of a condensing heat supply unit according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a terminal according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of an application scenario in an embodiment of the present invention.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made by way of specific embodiments with reference to the accompanying drawings.

Referring to fig. 1, a flowchart of an implementation method for determining a minimum peak shaving output of an industrial steam supply condition of a condensing heat supply unit according to an embodiment of the present invention is shown, where the method is applied to a terminal device, and is described in detail as follows:

and step 101, obtaining experimental steam supply and experimental pressure difference obtained by experiments of each industrial steam supply section, and determining a resistance characteristic function of each industrial steam supply section according to the experimental steam supply and the experimental pressure difference.

In this embodiment, when the extraction and condensation heat supply unit supplies steam to the industrial steam supply users, a long steam supply pipeline is required, and for convenience of description and calculation, the steam supply pipeline from the extraction and condensation heat supply unit to each industrial steam supply user is divided into a plurality of industrial steam supply sections. The terminal device may calculate a pressure value at an end point of each industrial steam supply section in a certain steam supply state based on a resistance characteristic function of each industrial steam supply section.

Optionally, the industrial steam supply section comprises a first industrial steam supply section, a second industrial steam supply section and a third industrial steam supply section, wherein the first industrial steam supply section is an industrial steam supply section from the tail end of the industrial steam supply main pipe to the industrial steam supply user end, the second industrial steam supply section is an industrial steam supply section from the industrial steam supply main pipe power plant end to the tail end of the industrial steam supply main pipe, and the third industrial steam supply section is an industrial steam supply section from the steam extraction port of the steam turbine of the extraction and condensation heat supply unit to the industrial steam supply main pipe power plant end; the experimental steam supply comprises at least one experimental steam supply of a user side of an industrial steam supply user, at least one total experimental steam supply and at least one experimental steam supply of a steam turbine of the extraction condensing heat supply unit.

In this embodiment, as shown in fig. 4, there may be a plurality of condensing heat supply units 401 supplying steam to the industrial steam supply main pipe 402 at the same time, and the industrial steam supply main pipe 402 may also supply steam to a plurality of industrial steam supply users 403 at the same time, so that the total steam supply of each condensing heat supply unit 401 is the total steam supply in the industrial steam supply main pipe 402, and the total steam supply of each industrial steam supply user 403 at the user side is the total steam supply in the industrial steam supply main pipe 402. In this embodiment, the experimental steam supply of the steam turbine of the extraction and condensation heat supply unit is the steam supply of the steam turbine of the extraction and condensation heat supply unit during the experiment, the user-side experimental steam supply is the user-side steam supply during the experiment, the total experimental steam supply is the total steam supply during the experiment, and the experimental steam supply of the steam turbine is the steam supply of the steam turbine during the experiment.

Correspondingly, step 101 includes:

Step 1011, obtaining a plurality of user side experimental steam supply amounts obtained by performing a pipeline system resistance characteristic experiment on a first industrial steam supply section corresponding to a target industrial steam supply user and pressure differences of the first industrial steam supply section corresponding to each user side experimental steam supply amount; the target industrial steam supply user is any industrial steam supply user.

In this embodiment, the pipeline system resistance characteristic experiment process for the first industrial steam supply section specifically includes the following steps:

1) Carrying out a steam supply pipeline resistance characteristic experiment on any industrial steam supply user (i-th user);

2) Maintaining stable parameters of the tail end of the industrial steam supply main pipe, wherein the pressure and the temperature are pmge0 and tmge0 respectively, and the units are MPa and the temperature are respectively;

3) And the valve from the tail end of the industrial steam supply main pipe to the user pipeline is kept fully open, and the experimental steam supply of the user side of the target industrial steam supply user is changed by adjusting the steam consumption of the user side. At least two tests of steam supply flow rate were performed, and the user side steam supply flow rate Fyh (i, j), steam supply pressure pyh (i, j), and steam supply temperature tyh (i, j) were recorded. j represents the j-th experiment. The units are t/h, MPa and DEG C respectively

4) Calculating the pressure difference of a first industrial steam supply section corresponding to an ith industrial steam supply user in the jth test:

△p(i,j)＝pmge0(i,j)-pyh(i,j)

Step 1012, fitting the resistance characteristic function of the first industrial steam supply segment corresponding to the target industrial steam supply user based on the experimental steam supply quantity at each user side of the target industrial steam supply user and the pressure difference of the corresponding first industrial steam supply segment under the experimental steam supply quantity at each user side.

In this embodiment, the resistance characteristic function of the first industrial steam supply section corresponding to the target industrial steam supply user is a quadratic function, and is used to calculate the pressure difference of the first industrial steam supply section corresponding to the target industrial steam supply user under the steam supply quantity of any user side.

Step 1013, obtaining a plurality of total experimental steam supply amounts obtained by performing a pipeline system resistance characteristic experiment on the second industrial steam supply section, and a pressure difference of the second industrial steam supply section corresponding to each total experimental steam supply amount.

In this embodiment, a pipeline system resistance characteristic experiment is performed on the second industrial steam supply section, and the experimental process is specifically as follows:

1) The total experimental steam supply quantity in the industrial steam supply main pipe is adjusted, and the power plant end and end operation parameters of the industrial steam supply main pipe under different total experimental steam supply quantities (at least four) are recorded, wherein the parameters comprise the total experimental steam supply quantity Fgc (k), the industrial steam supply main pipe power plant end pressure pmgs (k), the industrial steam supply main pipe power plant end steam supply temperature tmgs (k), the industrial steam supply main pipe end pressure pmge (k) and the industrial steam supply main pipe end temperature tmge (k). The pressure and temperature units are MPa and DEG C respectively, and the flow unit is t/h.

2) And calculating the steam supply pressure difference from the power plant end of the industrial steam supply main pipe to the tail end of the industrial steam supply main pipe under the kth total experimental steam supply.

△p(k)＝pmgs0(k)-pmge0(k)

Step 1014, fitting a resistance characteristic function of the second industrial steam supply section based on the pressure differences of the second industrial steam supply section corresponding to each total experimental steam supply.

In this embodiment, the resistance characteristic function of the second industrial steam supply section is a quadratic function, and is used to calculate the pressure difference of the corresponding second industrial steam supply section under any total steam supply.

Step 1015, obtaining a plurality of experimental steam supply amounts of the target steam turbine obtained by performing a pipeline system resistance characteristic experiment on a third industrial steam supply section corresponding to the target steam turbine, and the pressure difference of the third industrial steam supply section of the target steam turbine under each experimental steam supply amount; the target turbine is any turbine.

In this embodiment, the pipeline system resistance characteristic experiment process for the third industrial steam supply section specifically includes the following steps:

1) And carrying out resistance characteristic experiments on a pipeline system from a steam turbine steam extraction port of each heat supply unit in the power plant to the industrial steam supply main pipe power plant.

2) The valve from the steam extraction port of the steam turbine of the ijz th heat supply unit to the end of the industrial steam supply main pipe power plant is kept fully open, and the experimental steam supply of the steam turbine is changed by adjusting the load of the unit. At least two experiments of the experimental steam supply of the steam turbines are carried out, and the experimental steam supply Fgc (ijz, l), the steam turbine extraction pressure pcq (ijz, l), the extraction temperature tcq (ijz, l), the industrial steam supply main power plant end pressure pmgs (l), the steam supply temperature tmgs (l), the desuperheating water pressure pjw (l) and the desuperheating water temperature tjw (l) of the steam turbines of the ijz th heat supply unit are recorded. l represents the first test data. The units of steam supply, pressure and temperature are t/h, MPa and DEG C respectively.

3) Calculating the steam supply pressure difference from the steam extraction port of the steam turbine to the industrial steam supply main pipe power plant during the first test:

△p(ijz,l)＝pcq(ijz,l)-pmgs0(l)

step 1016, fitting the resistance characteristic function of the third industrial steam supply section corresponding to the target steam turbine based on each experimental steam supply of the target steam turbine and the pressure difference of the third industrial steam supply section of the target steam turbine under each experimental steam supply.

In this embodiment, the resistance characteristic function of the third industrial steam supply section corresponding to the target turbine is a quadratic function, and is used to calculate the pressure difference of the third industrial steam supply section of the target turbine under the steam supply of any turbine.

Step 102, calculating the pressure difference of each industrial steam supply section under the preset steam supply according to the resistance characteristic function of each industrial steam supply section, and determining the minimum steam extraction pressure of the extraction condensing heat supply unit steam turbine under the preset steam supply based on the preset steam supply, the lowest steam consumption parameter of the user side and the pressure difference of each industrial steam supply section.

In this embodiment, the preset steam supply is used to represent a certain steam supply distribution state, that is, the user side steam supply of each industrial steam supply user and the steam supply of the steam turbine of each condensing and heating unit are given, and the sum of the user side steam supply of each industrial steam supply user is equal to the sum of the steam supply of the steam turbines of each condensing and heating unit. The terminal equipment determines the minimum steam extraction pressure of the steam turbine meeting the minimum steam consumption parameter at the user side under the preset steam supply based on the resistance characteristic function of each industrial steam supply section and the minimum steam consumption parameter at the user side.

Optionally, the preset steam supply includes a preset steam supply of a user side of at least one industrial steam supply user, a preset steam supply of a steam turbine and a total preset steam supply; the minimum steam consumption parameters at the user side comprise the minimum steam consumption pressure and the minimum steam consumption temperature of each industrial steam supply user.

Accordingly, step 102 includes:

Step 1021, determining the pressure difference of the first industrial steam supply section of each industrial steam supply user under the preset steam supply of the corresponding user side based on the preset steam supply of the user side of each industrial steam supply user and the resistance characteristic function of the first industrial steam supply section corresponding to each industrial steam supply user.

In this example, the minimum steam pressure is in MPa and the minimum steam temperature is in ℃. The terminal equipment substitutes the preset steam supply quantity of the user side of each industrial steam supply user into the resistance characteristic function of the first industrial steam supply section corresponding to each industrial steam supply user, so that the pressure difference of the first industrial steam supply section of each industrial steam supply user under the preset steam supply quantity of the user side corresponding to each industrial steam supply user can be obtained.

Step 1022, calculating pmgemin =max [ pmin (i) +Δp (i) ], to obtain a minimum pressure value of the tail end of the industrial steam supply main pipe under the preset steam supply quantity at the user side of each industrial steam supply user, wherein pmgemin represents the minimum pressure value of the tail end of the industrial steam supply main pipe, pmin (i) represents the minimum steam supply pressure of the ith industrial steam supply user, and Δp (i) represents the pressure difference of the first industrial steam supply section corresponding to the ith industrial steam supply user under the preset steam supply quantity at the user side of each industrial steam supply user; max [ ] represents the maximum function.

In this embodiment, the terminal device adds the lowest steam consumption parameter of any industrial steam supply user to the pressure difference of the first industrial steam supply section of the industrial steam supply user under the preset steam supply amount of the corresponding user side, so as to obtain the lowest pressure of the industrial steam supply main pipe end of the industrial steam supply user under the preset steam supply amount of the corresponding user side. The terminal equipment calculates the minimum pressure of the tail end of the industrial steam supply main pipe of each industrial steam supply user under the preset steam supply quantity of the corresponding user side respectively, and selects the maximum value as the minimum pressure of the tail end of the industrial steam supply main pipe under the preset steam supply distribution state. The minimum pressure of the tail end of the industrial steam supply main pipe is the minimum pressure of the tail end of the industrial steam supply main pipe which can meet the minimum steam utilization pressure of each industrial steam supply user.

Step 1023, obtaining the pressure difference of the second industrial steam supply section corresponding to the total preset steam supply based on the total preset steam supply and the resistance characteristic function of the second industrial steam supply section.

In this embodiment, the total preset steam supply is the sum of preset steam supplies of the user side of each industrial steam supply user, and is also equal to the sum of preset steam turbine steam supplies of each condensing heat supply unit.

Step 1024, obtaining the minimum pressure value of the industrial steam supply main power plant end based on the minimum pressure value of the industrial steam supply main end and the pressure difference of the second industrial steam supply section corresponding to the total preset steam supply.

In this embodiment, the terminal device adds the minimum pressure value of the end of the industrial steam supply main pipe to the pressure difference of the second industrial steam supply section corresponding to the total preset steam supply amount to obtain the minimum pressure value of the industrial steam supply main pipe power plant end.

Step 1025, determining the pressure difference of the third industrial steam supply section of the steam turbine of the extraction condensing heat supply unit under the preset steam turbine steam supply based on the preset steam turbine steam supply and the resistance characteristic function of the third industrial steam supply section corresponding to the steam turbine of the extraction condensing heat supply unit.

In this embodiment, the terminal device substitutes the preset steam supply amount of the steam turbine into the resistance characteristic function of the third industrial steam supply section corresponding to the steam turbine of the extraction condensing heat supply unit to obtain the pressure difference of the third industrial steam supply section of the steam turbine of the extraction condensing heat supply unit under the preset steam supply amount of the steam turbine.

And 1026, calculating pcq (i _jz)mⁿ＝Pmgsmin+Δp(i_jz) to obtain the minimum extraction pressure of the steam turbine of the extraction condensing heat supply unit under the condition of the preset steam turbine steam supply, wherein pcq (i _jz) min represents the minimum extraction pressure of the steam turbine of the extraction condensing heat supply unit under the condition of the preset steam turbine steam supply, pmgsmin represents the minimum pressure value of the industrial steam supply main power plant end, Δp (i _jz) represents the pressure difference of the third industrial steam supply section of the steam turbine of the extraction condensing heat supply unit under the condition of the preset steam turbine steam supply, and i _jz represents the steam turbine number.

In this embodiment, the terminal device adds the minimum pressure value of the industrial steam supply main power plant end under the preset steam supply to the pressure difference of the third industrial steam supply section of the steam turbine of the extraction condensing heat supply unit under the preset steam supply of the steam turbine to obtain the minimum extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam supply of the steam turbine.

Step 103, initializing the main steam flow.

In this embodiment, the main steam flow is the main steam flow of the steam turbine of the extraction condensing heat supply unit. The terminal equipment needs to select a main steam flow value as an initial value to calculate the steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to each main steam flow, and determines the minimum main steam flow meeting the steam supply requirement based on each main steam flow and the steam extraction pressure of the steam turbine under the corresponding industrial steam supply working condition.

104, Determining the steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow; and adjusting the current main steam flow based on the difference value between the steam extraction pressure and the minimum steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow, and repeating the steps until the minimum main steam flow meeting the steam supply requirement is obtained.

In this embodiment, the terminal device adjusts the current main steam flow based on the difference between the steam turbine extraction pressure and the minimum extraction pressure under the industrial steam supply condition corresponding to the current main steam flow, so that the steam turbine extraction pressure under the industrial steam supply condition corresponding to the current main steam flow is continuously close to the minimum extraction pressure, thereby obtaining the minimum main steam flow meeting the steam supply requirement.

Optionally, the preset steam supply includes a preset steam turbine steam supply.

Accordingly, step 104 includes:

step 1041, obtaining a preset steam turbine steam supply, a steam extraction-industrial steam supply ratio, a first pressure calculation function, a second pressure calculation function and a first flow calculation function, wherein the first pressure calculation function is a function for calculating a first steam extraction pressure based on a main steam flow, the second pressure calculation function is a function for calculating a first steam extraction pressure based on a first through-flow steam flow, the first flow calculation function is a function for calculating a first through-flow steam flow based on the main steam flow, the first steam extraction pressure is a steam extraction pressure of a first steam extraction section, the first through-flow steam flow is a steam turbine through-flow steam flow after the first steam extraction section, and the first steam extraction section is a steam turbine steam extraction section corresponding to the industrial steam supply main pipe.

In this embodiment, the first pressure calculation function is a linear function, and may be obtained by fitting each main steam flow under multiple pure condensation design conditions and a first extraction pressure parameter corresponding to each main steam flow, the second pressure calculation function is a linear function, and may be obtained by fitting each first through-flow steam flow under multiple pure condensation design conditions and a first extraction pressure parameter corresponding to each first through-flow steam flow, and the first flow calculation function is a linear function, and may be obtained by fitting each main steam flow under multiple pure condensation design conditions and a first through-flow steam flow parameter corresponding to each main steam flow. The ratio of the extraction steam quantity to the industrial steam supply quantity is used for calculating the extraction steam quantity of the steam turbine corresponding to the steam supply quantity of any steam turbine.

Optionally, step 1041 includes:

Step 10411, obtaining steam supply pressure, steam supply temperature, temperature-reducing water pressure, temperature-reducing water temperature, steam extraction pressure of a steam turbine and steam extraction temperature of the steam turbine of a plurality of industrial steam supply main pipe power plant ends obtained by performing steam extraction quantity-industrial steam supply quantity ratio experiments on the extraction condensing heat supply unit.

Step 10412, calculatingObtaining the ratio of the steam extraction quantity to the industrial steam supply quantity in the experiment of the ratio of the first steam extraction quantity to the industrial steam supply quantity;

Wherein K (l) represents the ratio of the extraction amount to the industrial steam supply amount at the first test, l represents the number of times of the extraction amount to the industrial steam supply amount ratio test, hpt (p, t) represents a function of calculating the enthalpy value of the medium according to the medium pressure and the medium temperature, pmgs (l) represents the industrial steam supply main power plant end steam supply pressure at the first extraction amount to the industrial steam supply amount ratio test, tmgs (l) represents the industrial steam supply main power plant end steam supply temperature at the first extraction amount to the industrial steam supply amount ratio test, pjw (l) represents the desuperheat water pressure at the first extraction amount to the industrial steam supply amount ratio test, tjw (l) represents the desuperheat water temperature at the first extraction amount to the industrial steam supply amount ratio test, pcq (i _jz, l) represents the turbine pressure at the i _jz turbine at the first extraction amount to the industrial steam supply amount ratio test, q (i _jz, l) represents the turbine temperature at the first extraction amount to the i _jz at the first extraction amount to the industrial steam supply amount ratio test.

And 10413, taking the average value of the steam extraction quantity-industrial steam supply quantity ratio of each steam extraction quantity-industrial steam supply quantity ratio experiment as the steam extraction quantity-industrial steam supply quantity ratio.

In this embodiment, the terminal device calculates an average value of the multiple experimental results, so as to obtain a more accurate ratio of the extraction amount to the industrial steam supply amount.

Step 1042, calculating Fcq (i _jz)＝K×Fgc(i_jz) to obtain the steam extraction quantity of the steam turbine of the condensing heat supply unit; wherein Fcq (i _jz) represents the steam extraction amount of a steam turbine of the extraction condensing heat supply unit, K represents the ratio of the steam extraction amount to the industrial steam supply amount, fgc (i _jz) represents the preset steam supply amount of the steam turbine, and i _jz represents the number of the steam turbine.

In this embodiment, the terminal device calculates the product of the ratio of the extraction amount to the industrial steam supply amount and the preset steam supply amount of the steam turbine to obtain the extraction amount of the steam turbine of the extraction condensing heat supply unit

Step 1043, determining a first extraction pressure corresponding to the current main steam flow in the pure condensation state based on the current main steam flow and the first pressure calculation function;

In this embodiment, the terminal device substitutes the current main steam flow into the first pressure calculation function to obtain the first extraction pressure corresponding to the current main steam flow in the pure condensation state.

Step 1044, determining a first through-flow steam volume corresponding to the current main steam flow in the pure condensing state based on the current main steam flow and the first flow calculation function.

In this embodiment, the terminal device substitutes the current main steam flow into the first flow calculation function to obtain a first through-flow steam flow corresponding to the current main steam flow in the pure condensation state.

Step 1045, calculating Fcqh (i _jz)″＝Fcqh(i_jz)′-Fcq(i_jz) to obtain a first through-flow steam flow corresponding to the current main steam flow under the industrial steam supply working condition; wherein Fcqh (i _jz)' represents a first through-flow steam quantity corresponding to the current main steam flow in a pure condensing state, and Fcq (i _jz) represents the steam extraction quantity of a steam turbine of the extraction condensing heat supply unit.

In this embodiment, the terminal device subtracts the extraction steam quantity of the steam turbine of the extraction condensing heat supply unit from the first through-flow steam quantity corresponding to the current main steam flow in the pure condensing state, so as to obtain the first through-flow steam quantity corresponding to the current main steam flow in the industrial steam supply working condition.

In step 1046, a first extraction pressure under the industrial steam supply working condition corresponding to the current main steam flow is determined based on the first through-flow steam flow and the second pressure calculation function of the current main steam flow under the industrial steam supply working condition.

In this embodiment, the terminal device substitutes the first through-flow steam flow of the current main steam flow under the industrial steam supply working condition into the second pressure calculation function to obtain the first extraction pressure under the industrial steam supply working condition corresponding to the current main steam flow. The first extraction pressure is the extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow.

Optionally, step 104 further includes:

Calculating abs (pcq (i _jz)″-pcq(i_jz) min), wherein pcq (i _jz) "represents steam turbine extraction pressure under an industrial steam supply working condition corresponding to the current main steam flow, and pcq (i _jz) min represents minimum extraction pressure;

If abs (pcq (i _jz)″-pcq(i_jz) min) is greater than a preset threshold and pcq (i _jz)″＞pcq(i_jz) min, reducing the current main steam flow by a preset value;

if abs (pcq (i _jz)″-pcq(i_jz) min) is greater than a preset threshold and pcq (i _jz)″＜pcq(i_jz) min, increasing the current main steam flow by a preset value;

If abs (pcq (i _jz)″-pcq(i_jz) min) is less than or equal to a preset threshold value, the current main steam flow is taken as the minimum main steam flow meeting the steam supply requirement.

In this embodiment, the preset threshold may be 0.001, and the smaller the threshold, the more accurate the minimum main steam flow is obtained. If the steam extraction pressure of the steam turbine corresponding to the current main steam flow is larger than the minimum steam extraction pressure, the current main steam flow is larger, and the current main steam flow is reduced during adjustment; if the steam extraction pressure of the steam turbine corresponding to the current main steam flow is smaller than the minimum extraction pressure, the current main steam flow is smaller, and the current main steam flow is increased during adjustment. The current main steam flow adjustment can be determined according to the difference between the low pressure cylinder exhaust volume flow and the minimum exhaust volume flow.

And 105, determining the minimum peak regulation output corresponding to the preset steam supply of the extraction condensing heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement.

Optionally, step 105 includes:

And 1051, acquiring main steam flow and unit load data corresponding to a plurality of design working conditions of the heat supply unit in a pure condensation state.

In this embodiment, the plurality of design conditions may be a 100% THA design condition (THA represents turbine heat rate acceptance), a 75% THA design condition, and a 50% THA design condition. Each design condition corresponds to a set of main steam flow and unit load data.

And step 1052, interpolating main steam flow and unit load data corresponding to each design working condition of the heat supply unit in a pure condensation state to obtain the unit load corresponding to the minimum main steam flow meeting the steam supply requirement.

Step 1053, selecting a design working condition that the main steam flow is closest to the minimum main steam flow meeting the steam supply requirement, and determining the steam enthalpy value of a first steam extraction section and the steam exhaust enthalpy value of a low-pressure cylinder under the design working condition, wherein the first steam extraction section is a steam turbine steam extraction section corresponding to an industrial steam supply main pipe.

In this embodiment, the terminal device may select, from three sets of main steam flows and unit load data corresponding to the 100% tha design working condition, the 75% tha design working condition, and the 50% tha design working condition, a main steam flow closest to a minimum main steam flow meeting a steam supply requirement, and obtain a steam enthalpy value of a first steam extraction section and a steam exhaust enthalpy value of a low pressure cylinder under the design working condition corresponding to the main steam flow.

Step 1054, calculate Obtaining the minimum peak regulation output corresponding to the preset steam supply of the extraction condensing heat supply unit under the industrial steam supply working condition;

Wherein Pmin (i _jz) represents the minimum peak regulation output corresponding to the preset steam supply quantity of the extraction condensing heat supply unit under the industrial steam supply working condition, pcnmin (i _jz) represents the unit load corresponding to the minimum main steam flow meeting the steam supply requirement, hcq (i _jz) represents the steam enthalpy value of the first steam extraction section under the working condition that the main steam flow is closest to the minimum main steam flow meeting the steam supply requirement, and hlpex (i _jz) represents the low-pressure cylinder steam extraction enthalpy value under the working condition that the main steam flow is closest to the minimum main steam flow meeting the steam supply requirement.

It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.

The following are device embodiments of the invention, for details not described in detail therein, reference may be made to the corresponding method embodiments described above.

Fig. 2 is a schematic structural diagram of a device for determining minimum peak shaving output under industrial steam supply conditions of a condensing heat supply unit according to an embodiment of the present invention, and for convenience of explanation, only the portions related to the embodiment of the present invention are shown, which is described in detail below:

as shown in fig. 2, the determining device 2 for the minimum peak shaving output of the industrial steam supply condition of the condensing heat supply unit includes:

The characteristic determining module 21 is configured to obtain an experimental steam supply and an experimental pressure difference obtained by experiment of each industrial steam supply section, and determine a resistance characteristic function of each industrial steam supply section of the condensing heat supply unit according to the experimental steam supply and the experimental pressure difference;

the minimum pressure determining module 22 is configured to calculate a pressure difference of each industrial steam supply section under the preset steam supply according to the resistance characteristic function of each industrial steam supply section, and determine a minimum extraction pressure of the extraction condensing heat supply unit turbine under the preset steam supply based on the preset steam supply, the minimum steam consumption parameter of the user side and the pressure difference of each industrial steam supply section;

An initialization module 23 for initializing the main steam flow;

The main steam flow determining module 24 is configured to determine a steam extraction pressure of the steam turbine under an industrial steam supply condition corresponding to a current main steam flow; adjusting the current main steam flow based on the difference value between the steam extraction pressure and the minimum steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow, and repeating the steps until the minimum main steam flow meeting the steam supply requirement is obtained;

The minimum output determining module 25 is configured to determine a minimum peak shaving output corresponding to a preset steam supply amount of the condensing heat supply unit under an industrial steam supply working condition based on a minimum main steam flow meeting a steam supply requirement.

Optionally, the industrial steam supply section comprises a first industrial steam supply section, a second industrial steam supply section and a third industrial steam supply section, wherein the first industrial steam supply section is an industrial steam supply section from the tail end of the industrial steam supply main pipe to the industrial steam supply user end, the second industrial steam supply section is an industrial steam supply section from the industrial steam supply main pipe power plant end to the tail end of the industrial steam supply main pipe, and the third industrial steam supply section is an industrial steam supply section from the steam extraction port of the steam turbine of the extraction and condensation heat supply unit to the industrial steam supply main pipe power plant end; the experimental steam supply comprises at least one experimental steam supply of a user side of an industrial steam supply user, at least one total experimental steam supply and at least one experimental steam supply of a steam turbine of the extraction condensing heat supply unit;

the characteristic determination module 21 includes:

The first acquisition unit is used for acquiring a plurality of user side experimental steam supply amounts obtained by performing pipeline system resistance characteristic experiments on a first industrial steam supply section corresponding to a target industrial steam supply user and pressure differences of the first industrial steam supply section corresponding to each user side experimental steam supply amount; the target industrial steam supply user is any industrial steam supply user;

The first characteristic determining unit is used for fitting a resistance characteristic function of a first industrial steam supply section corresponding to the target industrial steam supply user based on the experimental steam supply quantity of each user side of the target industrial steam supply user and the pressure difference of the corresponding first industrial steam supply section under the experimental steam supply quantity of each user side;

The second acquisition unit is used for acquiring a plurality of total experimental steam supply quantities obtained by performing pipeline system resistance characteristic experiments on the second industrial steam supply section and pressure differences of the second industrial steam supply section corresponding to the total experimental steam supply quantities;

The second characteristic determining unit is used for fitting a resistance characteristic function of the second industrial steam supply section based on the total experimental steam supply and the pressure difference of the second industrial steam supply section corresponding to the total experimental steam supply;

the third acquisition unit is used for acquiring a plurality of experimental steam supply amounts of the target steam turbine and pressure differences of the third industrial steam supply section of the target steam turbine under each experimental steam supply amount, which are obtained by performing a pipeline system resistance characteristic experiment on the third industrial steam supply section corresponding to the target steam turbine; the target turbine is any turbine;

And the third characteristic determining unit is used for fitting a resistance characteristic function of a third industrial steam supply section corresponding to the target steam turbine based on each experimental steam supply of the target steam turbine and the pressure difference of the third industrial steam supply section of the target steam turbine under each experimental steam supply.

Optionally, the preset steam supply includes a preset steam supply of a user side of at least one industrial steam supply user, a preset steam supply of a steam turbine and a total preset steam supply; the minimum steam consumption parameters of the user side comprise the minimum steam consumption pressure and the minimum steam consumption temperature of each industrial steam supply user;

The minimum pressure determination module 22 includes:

the first pressure difference determining unit is used for determining the pressure difference of the first industrial steam supply section of each industrial steam supply user under the preset steam supply quantity of the corresponding user side based on the preset steam supply quantity of the user side of each industrial steam supply user and the resistance characteristic function of the first industrial steam supply section corresponding to each industrial steam supply user;

The tail end pressure determining unit is used for calculating pmgemin =Max [ pmin (i) +Δp (i) ], and obtaining a minimum pressure value of the tail end of the industrial steam supply main pipe under the preset steam supply quantity of the user side of each industrial steam supply user, wherein pmgemin represents the minimum pressure value of the tail end of the industrial steam supply main pipe, pmin (i) represents the minimum steam utilization pressure of the ith industrial steam supply user, and Δp (i) represents the pressure difference of a first industrial steam supply section corresponding to the ith industrial steam supply user under the preset steam supply quantity of the user side of each industrial steam supply user; max [ ] represents a maximum function;

The second differential pressure determining unit is used for obtaining the differential pressure of the second industrial steam supply section corresponding to the total preset steam supply based on the total preset steam supply and the resistance characteristic function of the second industrial steam supply section;

the power plant end pressure determining unit is used for obtaining the minimum pressure value of the power plant end of the industrial steam supply main pipe based on the minimum pressure value of the tail end of the industrial steam supply main pipe and the pressure difference of the second industrial steam supply section corresponding to the total preset steam supply amount;

The third pressure difference determining unit is used for determining the pressure difference of a third industrial steam supply section of the steam turbine of the extraction condensing heat supply unit under the preset steam turbine steam supply based on the preset steam turbine steam supply and a resistance characteristic function of the third industrial steam supply section corresponding to the steam turbine of the extraction condensing heat supply unit;

The minimum extraction pressure determining unit is configured to calculate pcq (i _jz)min＝Pmgsmin+Δp(i_jz) to obtain a minimum extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam turbine steam supply, where pcq (i _jz) min represents the minimum extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam turbine steam supply, pmgsmin represents a minimum pressure value at the industrial steam supply main power plant end, Δp (i _jz) represents a pressure difference of a third industrial steam supply section of the steam turbine of the extraction condensing heat supply unit under the preset steam turbine steam supply, and i _jz represents a steam turbine number.

Optionally, the preset steam supply includes a preset steam turbine steam supply;

The primary steam flow determination module 24 includes:

A fourth obtaining unit, configured to obtain a preset steam turbine steam supply, a steam extraction quantity-industrial steam supply ratio, a first pressure calculation function, a second pressure calculation function, and a first flow calculation function, where the first pressure calculation function is a function of calculating a first steam extraction pressure based on a main steam flow, the second pressure calculation function is a function of calculating a first steam extraction pressure based on a first through-flow steam flow, the first steam extraction pressure is a steam extraction pressure of a first steam extraction section, the first through-flow steam quantity is a steam turbine through-flow steam quantity after the first steam extraction section, and the first steam extraction section is a steam turbine extraction section corresponding to the industrial steam supply main pipe;

The extraction amount calculation unit is used for calculating Fcq (i _jz)＝K×Fgc(i_jz) to obtain the extraction amount of the steam turbine of the extraction condensing heat supply unit; wherein Fcq (i _jz) represents the steam extraction amount of a steam turbine of the extraction condensing heat supply unit, K represents the ratio of the steam extraction amount to the industrial steam supply amount, fgc (i _jz) represents the preset steam supply amount of the steam turbine, and i _jz represents the number of the steam turbine;

The first extraction pressure determining unit is used for determining a first extraction pressure corresponding to the current main steam flow in a pure condensation state based on the current main steam flow and a first pressure calculation function;

The first through-flow steam flow determining unit is used for determining a first through-flow steam flow corresponding to the current main steam flow in a pure condensation state based on the current main steam flow and a first flow calculating function;

The second through-flow steam flow determining unit is used for calculating Fcqh (i _jz)″＝Fcqh(i_jz)′-Fcq(i_jz) to obtain a first through-flow steam flow corresponding to the current main steam flow under the industrial steam supply working condition; wherein Fcqh (i _jz)' represents a first through-flow steam quantity corresponding to the current main steam flow in a pure condensing state, and Fcq (i _jz) represents the steam extraction quantity of a steam turbine of the extraction condensing heat supply unit.

The second extraction pressure determining unit is used for determining the first extraction pressure under the industrial steam supply working condition corresponding to the current main steam flow based on the first through-flow steam flow and the second pressure calculation function of the current main steam flow under the industrial steam supply working condition.

Optionally, the fourth obtaining unit is specifically configured to:

Obtaining steam supply pressure, steam supply temperature, desuperheating water pressure, desuperheating water temperature, steam extraction pressure of a steam turbine and steam extraction temperature of the steam turbine of a plurality of industrial steam supply main pipe power plant ends obtained by carrying out steam extraction quantity-industrial steam supply quantity ratio experiments on the extraction condensing heat supply unit;

Calculation of Obtaining the ratio of the steam extraction quantity to the industrial steam supply quantity in the experiment of the ratio of the first steam extraction quantity to the industrial steam supply quantity;

Wherein K (l) represents the ratio of the extraction amount to the industrial steam supply amount at the first test, l represents the number of times of the extraction amount to the industrial steam supply amount ratio test, hpt (p, t) represents a function of calculating the enthalpy value of the medium according to the medium pressure and the medium temperature, pmgs (l) represents the industrial steam supply main power plant end steam supply pressure at the first extraction amount to the industrial steam supply amount ratio test, tmgs (l) represents the industrial steam supply main power plant end steam supply temperature at the first extraction amount to the industrial steam supply amount ratio test, pjw (l) represents the desuperheat water pressure at the first extraction amount to the industrial steam supply amount ratio test, tjw (l) represents the desuperheat water temperature at the first extraction amount to the industrial steam supply amount ratio test, pcq (i _jz, l) represents the turbine pressure at the i _jz turbine at the first extraction amount to the industrial steam supply amount ratio test, q (i _jz, l) represents the turbine end steam supply temperature at the i _jz at the first extraction amount to the industrial steam supply amount ratio test;

taking the average value of the steam extraction quantity-industrial steam supply quantity ratio of each steam extraction quantity-industrial steam supply quantity ratio experiment as the steam extraction quantity-industrial steam supply quantity ratio.

Optionally, the main steam flow determination module 24 is specifically configured to:

Optionally, the minimum output determining module 25 is specifically configured to include:

Main steam flow and unit load data corresponding to a plurality of design working conditions of the heat supply unit in a pure condensation state are obtained;

interpolation is carried out on main steam flow and unit load data corresponding to each design working condition of the heat supply unit in a pure condensation state, and unit load corresponding to the minimum main steam flow meeting the steam supply requirement is obtained;

Selecting a design working condition that the main steam flow is closest to the minimum main steam flow meeting the steam supply requirement, and determining the steam enthalpy value of a first steam extraction section and the steam exhaust enthalpy value of a low-pressure cylinder under the design working condition, wherein the first steam extraction section is a steam turbine steam extraction section corresponding to an industrial steam supply main pipe;

Calculation of Obtaining the minimum peak regulation output corresponding to the preset steam supply of the extraction condensing heat supply unit under the industrial steam supply working condition;

Fig. 3 is a schematic diagram of a terminal according to an embodiment of the present invention. As shown in fig. 3, the terminal 3 of this embodiment includes: a processor 30, a memory 31 and a computer program 32 stored in said memory 31 and executable on said processor 30. The processor 30 executes the computer program 32 to implement the steps in the method embodiment for determining the minimum peak shaving output of the industrial steam supply condition of each set of condensing and heating units, for example, steps 101 to 105 shown in fig. 1. Or the processor 30, when executing the computer program 32, performs the functions of the modules/units of the device embodiments described above, such as the functions of the units 21 to 25 shown in fig. 2.

Illustratively, the computer program 32 may be partitioned into one or more modules/units that are stored in the memory 31 and executed by the processor 30 to complete the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the computer program 32 in the terminal 3.

The terminal 3 may be a computing device such as a desktop computer, a notebook computer, a palm computer, a cloud server, etc. The terminal may include, but is not limited to, a processor 30, a memory 31. It will be appreciated by those skilled in the art that fig. 3 is merely an example of the terminal 3 and does not constitute a limitation of the terminal 3, and may include more or less components than illustrated, or may combine certain components, or different components, e.g., the terminal may further include an input-output device, a network access device, a bus, etc.

The Processor 30 may be a central processing unit (Central Processing Unit, CPU), other general purpose Processor, digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 31 may be an internal storage unit of the terminal 3, such as a hard disk or a memory of the terminal 3. The memory 31 may also be an external storage device of the terminal 3, such as a plug-in hard disk, a smart memory card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, a flash memory card (FLASH CARD) or the like, which are provided on the terminal 3. Further, the memory 31 may also include both an internal storage unit and an external storage device of the terminal 3. The memory 31 is used for storing the computer program as well as other programs and data required by the terminal. The memory 31 may also be used for temporarily storing data that has been output or is to be output.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other manners. For example, the apparatus/terminal embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium may include content that is subject to appropriate increases and decreases as required by jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is not included as electrical carrier signals and telecommunication signals.

The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.

Claims

1. A method for determining minimum peak shaving output of an industrial steam supply working condition of a condensing heat supply unit is characterized by comprising the following steps: obtaining experimental steam supply and experimental pressure difference obtained by experiments of each industrial steam supply section, and determining a resistance characteristic function of each industrial steam supply section according to the experimental steam supply and the experimental pressure difference; calculating the pressure difference of each industrial steam supply section under the preset steam supply according to the resistance characteristic function of each industrial steam supply section, and determining the minimum steam extraction pressure of the extraction condensing heat supply unit steam turbine under the preset steam supply based on the preset steam supply, the minimum steam consumption parameter of the user side and the pressure difference of each industrial steam supply section; initializing main steam flow; determining the extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow; adjusting the current main steam flow based on the difference value between the steam extraction pressure and the minimum steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow, and repeating the steps until the minimum main steam flow meeting the steam supply requirement is obtained; determining the minimum peak regulation output corresponding to the preset steam supply of the extraction condensing heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement;

The industrial steam supply section comprises a first industrial steam supply section, a second industrial steam supply section and a third industrial steam supply section, wherein the first industrial steam supply section is an industrial steam supply section from the tail end of an industrial steam supply main pipe to the industrial steam supply user end, the second industrial steam supply section is an industrial steam supply section from the power plant end of the industrial steam supply main pipe to the tail end of the industrial steam supply main pipe, and the third industrial steam supply section is an industrial steam supply section from the steam extraction port of the steam turbine of the condensing heat supply unit to the power plant end of the industrial steam supply main pipe; the experimental steam supply comprises at least one experimental steam supply of a user side of an industrial steam supply user, at least one total experimental steam supply and at least one experimental steam supply of a steam turbine of a condensing heat supply unit;

The step of obtaining the experimental steam supply and experimental pressure difference obtained by each industrial steam supply section experiment, and determining the resistance characteristic function of each industrial steam supply section according to the experimental steam supply and experimental pressure difference comprises the following steps:

Obtaining a plurality of user side experimental steam supply amounts obtained by performing pipeline system resistance characteristic experiments on a first industrial steam supply section corresponding to a target industrial steam supply user, and pressure differences of the first industrial steam supply section corresponding to each user side experimental steam supply amount; the target industrial steam supply user is any industrial steam supply user;

Fitting a resistance characteristic function of a first industrial steam supply section corresponding to the target industrial steam supply user based on the differential pressure of the first industrial steam supply section corresponding to each user side experimental steam supply of the target industrial steam supply user;

Obtaining a plurality of total experimental steam supply quantities obtained by performing pipeline system resistance characteristic experiments on the second industrial steam supply section and pressure differences of the second industrial steam supply section corresponding to the total experimental steam supply quantities;

fitting a resistance characteristic function of the second industrial steam supply section based on the pressure difference of the second industrial steam supply section corresponding to each total experimental steam supply quantity;

Obtaining a plurality of experimental steam supply quantities of a target steam turbine obtained by performing pipeline system resistance characteristic experiments on a third industrial steam supply section corresponding to the target steam turbine, and pressure differences of the third industrial steam supply section of the target steam turbine under the experimental steam supply quantities; the target turbine is any turbine;

Fitting a resistance characteristic function of a third industrial steam supply section corresponding to the target steam turbine based on the differential pressure of the third industrial steam supply section of the target steam turbine under each experimental steam supply;

The preset steam supply comprises a preset steam supply of a user side of at least one industrial steam supply user, a preset steam supply of a steam turbine and a total preset steam supply; the user side minimum steam consumption parameters comprise minimum steam consumption pressure and minimum steam consumption temperature of each industrial steam supply user;

The calculating the pressure difference of each industrial steam supply section under the preset steam supply according to the resistance characteristic function of each industrial steam supply section, and determining the minimum extraction pressure of the extraction condensing heat supply unit steam turbine under the preset steam supply based on the preset steam supply, the lowest steam consumption parameter of the user side and the pressure difference of each industrial steam supply section comprises:

Determining the pressure difference of the first industrial steam supply section of each industrial steam supply user under the preset steam supply of the corresponding user side based on the preset steam supply of the user side of each industrial steam supply user and the resistance characteristic function of the first industrial steam supply section corresponding to each industrial steam supply user;

Calculation of Obtaining the minimum pressure value of the tail end of the industrial steam supply main pipe under the preset steam supply quantity of the user of each industrial steam supply user, wherein/>Representing the minimum pressure value of the end of the industrial steam supply main pipe,/>Represents the/>Minimum steam pressure for individual industrial steam supply users,/>Representing the first/>, under the preset steam supply quantity, of the users of each industrial steam supply userDifferential pressure of a first industrial steam supply section corresponding to each industrial steam supply user; /(I)Representing a maximum function;

Obtaining the pressure difference of the second industrial steam supply section corresponding to the total preset steam supply based on the total preset steam supply and the resistance characteristic function of the second industrial steam supply section;

Obtaining a minimum pressure value of the industrial steam supply main power plant end based on the minimum pressure value of the industrial steam supply main end and the pressure difference of the second industrial steam supply section corresponding to the total preset steam supply;

determining the pressure difference of a third industrial steam supply section of a steam turbine of the extraction condensing heat supply unit under the preset steam turbine steam supply based on the preset steam turbine steam supply and a resistance characteristic function of the third industrial steam supply section corresponding to the steam turbine of the extraction condensing heat supply unit;

Calculation of Obtaining the minimum extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam supply of the steam turbine, wherein/>Representing the minimum extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam supply of the steam turbine,/>Representing the minimum pressure value of the industrial steam supply main pipe power plant end,/>Representing the pressure difference of the third industrial steam supply section of the steam turbine of the extraction condensing heat supply unit under the preset steam supply of the steam turbine,/>Indicating the turbine number.

2. The method for determining the minimum peak shaving output of the industrial steam supply working condition of the extraction and condensation heat supply unit according to claim 1, wherein,

The preset steam supply comprises a preset steam turbine steam supply;

the determining the steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow comprises the following steps:

Acquiring the preset steam turbine steam supply, a steam extraction-industrial steam supply ratio, a first pressure calculation function, a second pressure calculation function and a first flow calculation function, wherein the first pressure calculation function is a function for calculating first steam extraction pressure based on main steam flow, the second pressure calculation function is a function for calculating first steam extraction pressure based on first through-flow steam flow, the first flow calculation function is a function for calculating first through-flow steam flow based on main steam flow, the first steam extraction pressure is the steam extraction pressure of a first steam extraction section, the first through-flow steam flow is the steam turbine through-flow steam flow after the first steam extraction section, and the first steam extraction section is the steam turbine steam extraction section corresponding to an industrial steam supply main pipe;

Calculation of Obtaining the steam extraction quantity of a steam turbine of the extraction condensing heat supply unit; wherein/>Representing the extraction steam quantity of a steam turbine of the extraction condensing heat supply unit,/>Representing the ratio of the steam extraction quantity to the industrial steam supply quantity,/>Representing the preset steam turbine steam supply quantity,/>Representing the number of the steam turbine;

Determining a first extraction pressure corresponding to the current main steam flow in a pure condensing state based on the current main steam flow and the first pressure calculation function;

determining a first through-flow steam quantity corresponding to the current main steam flow in a pure condensation state based on the current main steam flow and the first flow calculation function;

Calculation of Obtaining a first through-flow steam flow corresponding to the current main steam flow under an industrial steam supply working condition; wherein/>Representing the corresponding first through-flow steam flow of the current main steam flow in the pure condensation state,/>Representing the steam extraction quantity of a steam turbine of the extraction condensing heat supply unit;

And determining the first steam extraction pressure under the industrial steam supply working condition corresponding to the current main steam flow based on the first through-flow steam flow and the second pressure calculation function of the current main steam flow under the industrial steam supply working condition.

3. The method for determining the minimum peak shaving output of the industrial steam supply condition of the extraction and condensation heat supply unit according to claim 2, wherein the step of obtaining the ratio of the steam extraction quantity to the industrial steam supply quantity comprises the following steps:

Calculation of Obtain the/>The ratio of the secondary steam extraction quantity to the industrial steam supply quantity is the steam extraction quantity to the industrial steam supply quantity in the experiment;

Wherein, Represents the/>Steam extraction quantity-industrial steam supply quantity ratio in secondary test,/>Shows the number of times of experiments of the ratio of the steam extraction quantity to the industrial steam supply quantity,/>Representing a function of calculating the enthalpy of the medium from the pressure and temperature of the medium,/>Represents the/>Industrial steam supply main pipe power plant end steam supply pressure in secondary steam extraction quantity-industrial steam supply quantity ratio experimentRepresents the/>Steam supply temperature of industrial steam supply main pipe power plant end in secondary steam extraction quantity-industrial steam supply quantity ratio experimentRepresents the/>Temperature-reducing water pressure in secondary steam extraction quantity-industrial steam supply quantity ratio experimentRepresents the/>Temperature of desuperheating water in secondary steam extraction quantity-industrial steam supply quantity ratio experiment,/>Represents the/>The/>, of the experiment of the ratio of the secondary steam extraction quantity to the industrial steam supply quantitySteam turbine extraction pressure of steam turbineRepresents the/>The/>, of the experiment of the ratio of the secondary steam extraction quantity to the industrial steam supply quantitySteam turbine extraction temperature of the steam turbine;

4. The method for determining the minimum peak shaving output under the industrial steam supply condition of the extraction condensing heat supply unit according to any one of claims 1 to 3, wherein the adjusting the current main steam flow based on the difference between the steam turbine extraction pressure and the minimum extraction pressure under the industrial steam supply condition corresponding to the current main steam flow comprises:

Calculation of Wherein/>Representing the extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flowRepresenting the minimum extraction pressure;

If it is Preset threshold value, and/>Reducing the current main steam flow by a preset value;

If it is Preset threshold value, and/>Increasing the current main steam flow by a preset value;

If it is And taking the current main steam flow as the minimum main steam flow meeting the steam supply requirement.

5. The method for determining the minimum peak shaving output of the industrial steam supply condition of the condensing heat supply unit according to claim 4, wherein determining the minimum peak shaving output of the condensing heat supply unit corresponding to the preset steam supply under the industrial steam supply condition based on the minimum main steam flow meeting the steam supply requirement comprises:

Wherein, Representing the minimum peak regulation output of the extraction condensing heat supply unit corresponding to the preset steam supply under the industrial steam supply working condition,/>Representing the unit load corresponding to the minimum main steam flow meeting the steam supply requirement,/>Representing the extraction steam quantity of a steam turbine of the extraction condensing heat supply unit,/>Representing the vapor enthalpy value of the first vapor extraction section under the working condition that the main vapor flow is closest to the minimum main vapor flow meeting the vapor supply requirement,/>And the low-pressure cylinder steam discharge enthalpy value under the working condition that the main steam flow is closest to the minimum main steam flow meeting the steam supply requirement is represented.

6. The device for determining the minimum peak shaving output of the industrial steam supply working condition of the extraction condensing heat supply unit is characterized by comprising the following components:

The initialization module is used for initializing the main steam flow;

The minimum output determining module is used for determining the minimum peak regulation output corresponding to the preset steam supply of the extraction condensing heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement;

The industrial steam supply section comprises a first industrial steam supply section, a second industrial steam supply section and a third industrial steam supply section, wherein the first industrial steam supply section is an industrial steam supply section between the tail end of an industrial steam supply main pipe and the industrial steam supply user end, the second industrial steam supply section is an industrial steam supply section between the power plant end of the industrial steam supply main pipe and the tail end of the industrial steam supply main pipe, and the third industrial steam supply section is an industrial steam supply section between the steam extraction port of the steam turbine of the extraction condensing heat supply unit and the power plant end of the industrial steam supply main pipe; the experimental steam supply comprises at least one experimental steam supply of a user side of an industrial steam supply user, at least one total experimental steam supply and at least one experimental steam supply of a steam turbine of the extraction condensing heat supply unit;

The characteristic determination module includes:

The third characteristic determining unit is used for fitting a resistance characteristic function of a third industrial steam supply section corresponding to the target steam turbine based on each experimental steam supply of the target steam turbine and the pressure difference of the third industrial steam supply section of the target steam turbine under each experimental steam supply;

the preset steam supply comprises a preset steam supply of a user side of at least one industrial steam supply user, a preset steam supply of a steam turbine and a total preset steam supply; the minimum steam consumption parameters of the user side comprise the minimum steam consumption pressure and the minimum steam consumption temperature of each industrial steam supply user;

The minimum pressure determination module includes:

an end pressure determining unit for calculating Obtaining the minimum pressure value of the tail end of the industrial steam supply main pipe under the preset steam supply quantity of the user of each industrial steam supply user, wherein/>Representing the minimum pressure value of the tail end of the industrial steam supply main pipe,/>Represents the/>Minimum steam pressure for individual industrial steam supply users,/>Representing the first/>, under the preset steam supply quantity, of the users of each industrial steam supply userDifferential pressure of a first industrial steam supply section corresponding to each industrial steam supply user; max [ ] represents a maximum function;

a minimum extraction pressure determining unit for calculating Obtaining the minimum extraction pressure of a steam turbine of the extraction condensing heat supply unit under the condition of presetting steam supply of the steam turbine, wherein/>Representing minimum extraction pressure of a steam turbine of a condensing heat supply unit under the condition of presetting steam supply of the steam turbine,/>Representing the minimum pressure value of the industrial steam supply main pipe power plant end,/>Representing the pressure difference of a third industrial steam supply section of a steam turbine of the extraction condensing heat supply unit under the preset steam supply quantity of the steam turbine, and the pressure difference is/Indicating the turbine number.

7. A terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, carries out the steps of the method for determining the minimum peak shaving output of the industrial steam supply condition of the extraction and condensation heating unit according to any one of claims 1 to 5.

8. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor performs the steps of the method for determining the minimum peak shaving output for the industrial steam supply condition of the pump condensation heat supply unit according to any one of claims 1 to 5.