CN116611220A

CN116611220A - Method, device, equipment and medium for calculating power and heat consumption rate of steam turbine generator unit

Info

Publication number: CN116611220A
Application number: CN202310460157.1A
Authority: CN
Inventors: 杨文正
Original assignee: Guoneng Nanjing Electric Power Test Research Co ltd
Current assignee: Guoneng Nanjing Electric Power Test Research Co ltd
Priority date: 2023-04-24
Filing date: 2023-04-24
Publication date: 2023-08-18

Abstract

The invention provides a method, a device, equipment and a medium for calculating the power and the heat rate of a steam turbine generator unit, and belongs to the technical field of steam turbines. Based on the principle that the influence of back pressure change on the turbine is on the change of work load of a low-pressure cylinder, the method converts the correction coefficient of back pressure of a pure condensation working condition on power into the correction coefficient of back pressure of a heat supply working condition on power, then separates out the output of the low-pressure cylinder of a steam extraction heat supply working condition, corrects the output of the low-pressure cylinder, obtains the influence of the back pressure change on the power of a steam turbine generator unit under the heat supply working condition, and finally obtains the influence of the back pressure change on the heat consumption rate through the inverse proportion of the power change and the heat consumption rate change of the steam turbine generator unit. The invention can accurately calculate the power and the heat consumption rate of the steam turbine generator unit under the heat supply working condition, thereby enabling a user to judge the operation economy of the steam turbine generator unit under the heat supply working condition.

Description

Method, device, equipment and medium for calculating power and heat consumption rate of steam turbine generator unit

Technical Field

The invention relates to the technical field of steam turbines, in particular to a method for calculating power and heat rate of a steam turbine generator unit, a device for calculating power and heat rate of the steam turbine generator unit, electronic equipment and a computer readable storage medium.

Background

In recent years, with the increasing environmental protection pressure in various countries, reduction of carbon dioxide emissions and improvement of energy utilization have become a common worldwide concern. The advanced high-efficiency steam turbine steam extraction and heat supply of a thermal power plant is widely recognized by various countries in the world as an important means for improving the energy utilization efficiency and realizing energy conservation and emission reduction. Therefore, more and more pure condensing units are modified into heating units according to the demands of local industrial heat users.

In actual operation of the turbo generator set, initial and final parameters inevitably deviate from design parameters, and the change of the back pressure can be obtained from theoretical deduction or actual engineering application of the operation back pressure, which is one of main parameters with the greatest influence on the running economy of the set. Therefore, how to accurately judge the influence of the back pressure change on the running economy of the steam turbine generator unit has important practical significance for the transverse comparison of the economy of different types of unit and the optimized running mode of the unit. In general, the influence of the power and the heat consumption rate of the steam turbine generator unit can be judged by the backpressure correction curve of the steam turbine manufacturer for the pure condensing unit.

However, because the working proportion of the low-pressure cylinder in the heat supply working condition is obviously lower than that of the low-pressure cylinder in the pure condensation working condition, and the working proportion of the low-pressure cylinder is changed along with the change of the heat supply steam extraction quantity, the judging method is only suitable for the pure condensation working condition and is not suitable for the heat supply working condition, and therefore the influence of the back pressure change of the turbo generator set on the running economy of the set under the heat supply working condition cannot be judged.

Disclosure of Invention

The embodiment of the invention aims to provide a method, a device, equipment and a medium for calculating the power and the heat rate of a steam turbine generator unit, so as to solve the problem that the operation economy of the steam turbine generator unit under the heating working condition cannot be judged.

In order to achieve the above object, an embodiment of the present invention provides a method for calculating power and heat consumption rate of a turbo generator set, including:

respectively acquiring the power of the turbo generator set corresponding to the power of the turbo generator set and the work done by the low-pressure cylinder under the heat supply working condition and the pure condensation working condition and the heat consumption rate of the turbo generator set under the heat supply working condition;

obtaining a change value of the power of the turbo generator set after the back pressure change under the pure condensation condition based on the power of the turbo generator set under the pure condensation condition and a correction coefficient of the preset back pressure change on the power of the turbo generator set;

obtaining a change coefficient of the turbo generator set power corresponding to the low-pressure cylinder acting based on the turbo generator set change value after the back pressure change under the pure condensation working condition and the turbo generator set power corresponding to the low-pressure cylinder acting under the pure condensation working condition;

based on the change coefficient of the turbo generator set power corresponding to the low-pressure cylinder acting and the turbo generator set power corresponding to the low-pressure cylinder acting under the heating working condition, obtaining the change value of the turbo generator set power after the back pressure under the heating working condition is changed;

Obtaining the power of the turbo generator set after the back pressure change under the heat supply working condition based on the change value of the power of the turbo generator set after the back pressure change under the heat supply working condition and the power of the turbo generator set under the heat supply working condition;

and obtaining the heat consumption rate of the turbo generator set after the back pressure change under the heat supply working condition based on the change value of the power of the turbo generator set after the back pressure change under the heat supply working condition, the power of the turbo generator set after the back pressure change under the heat supply working condition and the heat consumption rate of the turbo generator set under the heat supply working condition.

Optionally, the obtaining the change value of the turbo generator set power after the back pressure change under the pure condensation condition based on the turbo generator set power under the pure condensation condition and the correction coefficient of the preset back pressure change to the turbo generator set power includes:

calculating the correction coefficient of the turbo generator set power by utilizing the formula (1) and the pre-set back pressure change under the pure condensation working condition to obtain the change value of the turbo generator set power after the back pressure change under the pure condensation working condition;

ΔW＝W _e ×θ _e /100 (1)；

wherein DeltaW represents a variation value of the power of the steam turbine generator unit after the back pressure is changed under the pure condensation condition; w (W) _e Representing the power of the steam turbine generator unit under the pure condensation condition; θ _e Representation ofAnd presetting a correction coefficient of the back pressure change to the power of the steam turbine generator unit.

Optionally, the obtaining the change coefficient of the turbo generator set power corresponding to the low-pressure cylinder acting based on the turbo generator set change value after the back pressure change under the pure condensation condition and the turbo generator set power corresponding to the low-pressure cylinder acting under the pure condensation condition includes:

calculating a change value of the power of the turbo generator set after the back pressure change under the pure condensation working condition and the power of the turbo generator set corresponding to the acting quantity of the low-pressure cylinder under the pure condensation working condition by utilizing a formula (2), so as to obtain a change coefficient of the power of the turbo generator set corresponding to the acting quantity of the low-pressure cylinder;

wherein ,θ_LP-e Representing the change coefficient of the power of the turbo generator set corresponding to the work of the low-pressure cylinder; Δw represents a value of a change in power of the turbo generator set after the back pressure under the pure condensation condition changes; w (W) _LP-e And the power of the turbo generator unit corresponding to the acting quantity of the low-pressure cylinder under the pure condensation working condition is represented.

Optionally, the obtaining the change value of the turbo generator set power after the back pressure change under the heating working condition based on the change coefficient of the turbo generator set power corresponding to the low pressure cylinder working and the turbo generator set power corresponding to the low pressure cylinder working quantity under the heating working condition includes:

Calculating a change coefficient of the turbo generator set power corresponding to the low-pressure cylinder acting and a change value of the turbo generator set power corresponding to the low-pressure cylinder acting under the heat supply working condition by utilizing a formula (3) to obtain a back pressure change turbo generator set power change value under the heat supply working condition;

wherein ,ΔW^gr Steam turbine power generation after back pressure change under heat supply working conditionA change value of unit power;the power of the turbo generator unit corresponding to the acting quantity of the low-pressure cylinder under the heating working condition is represented; θ _LP-e And the change coefficient of the power of the turbo generator set corresponding to the work of the low-pressure cylinder is represented.

Optionally, the obtaining the turbo generator set power after the back pressure change under the heating condition based on the change value of the turbo generator set power after the back pressure change under the heating condition and the turbo generator set power under the heating condition includes:

calculating a variation value of the power of the turbo generator set after the back pressure variation under the heat supply working condition and the power of the turbo generator set under the heat supply working condition by utilizing a formula (4) to obtain the power of the turbo generator set after the back pressure variation under the heat supply working condition;

wherein ,the power of the turbo generator set after the back pressure change under the heating working condition is represented; / >The power of the steam turbine generator unit under the heating working condition is represented; ΔW (delta W) ^gr And the variation value of the power of the turbo generator set after the back pressure is changed under the heating working condition is represented.

Optionally, the obtaining the heat consumption rate of the turbo generator set after the back pressure change under the heating condition based on the change value of the power of the turbo generator set after the back pressure change under the heating condition, the power of the turbo generator set after the back pressure change under the heating condition and the heat consumption rate of the turbo generator set under the heating condition includes:

calculating the variation value of the power of the turbo generator set after the back pressure variation under the heat supply working condition, the power of the turbo generator set under the heat supply working condition and the heat consumption rate of the turbo generator set under the heat supply working condition by utilizing the formula (5), so as to obtain the heat consumption rate of the turbo generator set after the back pressure variation under the heat supply working condition;

wherein ,the heat consumption rate of the turbo generator set after the back pressure change under the heating working condition is represented; />The heat consumption rate of the steam turbine generator unit under the heating working condition is represented; />And the power of the steam turbine generator unit under the heating working condition is represented.

Optionally, the correction coefficient of the preset back pressure change to the power of the turbo generator set is obtained by the following way:

acquiring back pressure of the back extractor under a pure condensation condition;

And obtaining a correction coefficient of the preset back pressure change to the power of the steam turbine generator unit based on a preset pure condensing condition back pressure correction curve and back pressure of the back extractor under the pure condensing condition.

In a second aspect of the embodiment of the present invention, there is provided a turbo generator set power and heat rate calculation apparatus, including:

the data acquisition module is used for respectively acquiring the power of the turbo generator set corresponding to the acting quantity of the low-pressure cylinder and the power of the turbo generator set under the heat supply working condition and the pure condensation working condition and the heat consumption rate of the turbo generator set under the heat supply working condition;

the first power calculation module is used for obtaining a change value of the turbo generator set power after the back pressure change under the pure condensation working condition based on the turbo generator set power under the pure condensation working condition and a correction coefficient of the preset back pressure change on the turbo generator set power;

the coefficient calculation module is used for obtaining a change coefficient of the turbo generator set power corresponding to the low-pressure cylinder acting based on the turbo generator set change value after the back pressure change under the pure condensation working condition and the turbo generator set power corresponding to the low-pressure cylinder acting under the pure condensation working condition;

the second power calculation module is used for obtaining a change value of the turbo generator set power after the back pressure change under the heating working condition based on the change coefficient of the turbo generator set power corresponding to the low-pressure cylinder acting and the turbo generator set power corresponding to the low-pressure cylinder acting quantity under the heating working condition;

The power correction module is used for obtaining the power of the turbo generator set after the back pressure change under the heat supply working condition based on the change value of the power of the turbo generator set after the back pressure change under the heat supply working condition and the power of the turbo generator set under the heat supply working condition;

and the heat consumption rate correction module is used for obtaining the heat consumption rate of the turbo-generator unit after the back pressure change under the heat supply working condition based on the change value of the power of the turbo-generator unit after the back pressure change under the heat supply working condition, the power of the turbo-generator unit after the back pressure change under the heat supply working condition and the heat consumption rate of the turbo-generator unit under the heat supply working condition.

In a third aspect of the embodiment of the present invention, there is provided an electronic device, including: the system comprises a processor and a memory, wherein the memory stores machine-readable instructions executable by the processor, and the machine-readable instructions execute the turbo generator set power and heat rate calculation method when executed by the processor.

In a fourth aspect of the embodiment of the present invention, there is provided a computer readable storage medium storing computer instructions, wherein the computer instructions, when run on a computer, cause the computer to perform the above-described turbo generator set power and heat rate calculation method.

According to the embodiment of the invention, the correction coefficient of the back pressure of the pure condensation working condition on the power of the low-pressure cylinder is converted into the correction coefficient of the back pressure of the heat supply working condition on the power of the low-pressure cylinder based on the principle that the influence of the back pressure change on the turbine per se is on the work load change of the low-pressure cylinder, then the low-pressure cylinder output of the steam extraction heat supply working condition is separated and corrected, the influence of the back pressure change on the power of the turbo generator set under the heat supply working condition is obtained, and finally the influence of the back pressure change on the heat consumption rate is further obtained through the inverse relation between the power change of the turbo generator set and the heat consumption rate, so that the influence of the back pressure change of the turbo generator set under the heat supply working condition on the unit operation economy can be accurately calculated.

Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain, without limitation, the embodiments of the invention. In the drawings:

Fig. 1 is a schematic flow chart of a method for calculating power and heat rate of a turbo unit according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a turbo generator set according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a device for calculating power and heat rate of a turbo unit according to an embodiment of the present application;

FIG. 4 is a graph showing the relationship between back pressure and back pressure variation versus the power correction factor of the turbo-generator set;

FIG. 5 is a schematic diagram showing the relationship between back pressure and back pressure variation under different working conditions and the heat rate correction coefficient of the turbo generator set.

Detailed Description

The following describes the detailed implementation of the embodiments of the present application with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the application, are not intended to limit the application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Before describing the present invention, the principle of the present invention will be described:

the opening of the regulating valve is unchanged when the turbo generator set operates under sliding pressure, the flow area and the relative internal efficiency of the regulating stage are basically unchanged, the influence of back pressure change on the turbo generator set is mainly reflected in the relative internal efficiency of the final stage, and the change of the steam extraction quantity of the low-pressure heater caused by the condensation water temperature change caused by the back pressure change, so that the operation economy of the turbo generator is affected. Through a large number of practices, the final stage relative internal efficiency change and the low-pressure heater steam extraction amount change are changes which influence the work done by the low-pressure cylinder in the whole steam turbine, and the work done by the high-pressure cylinder and the medium-pressure cylinder is negligible.

Therefore, based on the principle that the work quantity of the low-pressure cylinder can characterize the influence of the back pressure change on the turbo generator unit, then according to the turbo generator unit power under the pure condensation working condition and the correction coefficient of the back pressure change of the pure condensation working condition on the generator power, the change value of the turbo generator unit power after the back pressure change under the pure condensation working condition is calculated, then the ratio of the change value of the turbo generator unit power after the back pressure change under the pure condensation working condition to the change coefficient of the turbo generator unit power corresponding to the work quantity of the low-pressure cylinder is calculated, the influence law of the back pressure change on the turbo generator power corresponding to the work quantity of the low-pressure cylinder is characterized, then the turbo generator power corresponding to the work quantity of the low-pressure cylinder under the heat supply working condition is calculated based on the law, the turbo generator power change value after the back pressure change under the heat supply working condition is obtained, the turbo generator power after the back pressure change under the heat supply working condition is corrected by utilizing the turbo generator power change value of the back pressure change under the heat supply working condition, and the power of the turbo generator after the back pressure correction under the heat supply working condition is obtained.

Referring to fig. 1, fig. 1 is a flow chart of a method for calculating power and heat rate of a turbo unit according to an embodiment of the present invention, the method includes the following steps:

s100, respectively acquiring the power of the turbo generator set corresponding to the power of the turbo generator set and the work done by the low-pressure cylinder under the heat supply working condition and the pure condensation working condition and the heat consumption rate of the turbo generator set under the heat supply working condition;

in order to facilitate a better understanding of the inventive concept, a schematic structural diagram of a turbo generator set is given below. As shown in fig. 2, the turbo generator set includes: the high pressure cylinder, the low pressure cylinder, the medium pressure cylinder and the generator, and in addition, fig. 2 also shows the flow direction of the steam in the high pressure cylinder, the medium pressure cylinder and the low pressure cylinder. The binding analysis can be performed with reference to fig. 2 in the subsequent calculation process.

It can be appreciated that the turbo generator set has different operation conditions, including: pure condensing conditions and heating conditions. There are a number of thermal performance parameters under different conditions including, but not limited to: the power and heat consumption rate of the turbo generator set are corresponding to the acting quantity of the low-pressure cylinder.

S200, obtaining a change value of the power of the turbo generator set after the back pressure change under the pure condensation condition based on the power of the turbo generator set under the pure condensation condition and a correction coefficient of the preset back pressure change on the power of the turbo generator set;

The correction coefficient of the preset back pressure change on the power of the steam turbine generator unit refers to the influence quantity of the back pressure change on the power of the steam turbine generator unit. For example: the reference back pressure (design back pressure) is 5.88kPa, the back pressure of the actual unit operation is 7.85kPa, and then the correction coefficient of the generator power corresponding to 7.85kPa is found to be-1.92% according to the correction curve of the pure condensation working condition back pressure to the generator power, namely, after the back pressure is increased from 5.88 to 7.85, the generator power is reduced by 1.92% points.

S300, obtaining a change coefficient of the turbo generator set power corresponding to the low-pressure cylinder acting based on the turbo generator set change value after the back pressure change under the pure condensation working condition and the turbo generator set power corresponding to the low-pressure cylinder acting under the pure condensation working condition;

s400, obtaining a change value of the turbo generator set power after the back pressure change under the heating working condition based on a change coefficient of the turbo generator set power corresponding to the low-pressure cylinder acting and the turbo generator set power corresponding to the low-pressure cylinder acting quantity under the heating working condition;

in one embodiment, the power of the turbo generator set corresponding to the low-pressure cylinder working capacity under the pure condensation working condition and the heat supply working condition can be calculated by the following manner:

The following description will be given by taking a calculation process of the turbo generator set power corresponding to the low-pressure cylinder working capacity under the pure condensation working condition as an example, and the calculation process of the turbo generator set power corresponding to the low-pressure cylinder working capacity under the heating working condition is consistent with the calculation process of the turbo generator set power corresponding to the low-pressure cylinder working capacity under the pure condensation working condition, which is not described herein.

1. Calculating steam flow of each stage of sections of the high and medium pressure cylinders of the turbine unit:

(1) Using formula M _z-t ＝M _z -M _hm Calculating the main steam flow and the high-pressure gate rod steam leakage under the pure condensation condition to obtain the steam flow from the main steam to the regulating stage under the pure condensation condition;

(2) Using formula M _t-1 ＝M _z-t -M _gq Calculating the flow of the main steam to the regulating stage and the flow of the steam leaking from the regulating stage to the medium-pressure cylinder under the pure condensation working condition to obtain the flow of the steam from the regulating stage to the first-stage steam extraction;

(3) Using formula M _1-g ＝M _t-1 -M ₁ Calculating the steam flow from the regulating stage to the first-stage extraction steam and the first-stage extraction steam under the pure condensation condition to obtain the steam flow from the first-stage extraction steam to the high-pressure cylinder extraction steam under the pure condensation condition;

(4) Using formula M _zr-3 ＝M _zr -M _im +M _gq For reheat steam flow and medium pressure door under pure condensation conditionCalculating the steam leakage quantity of the rod and the flow of the regulating stage steam leakage to the medium pressure cylinder to obtain the steam flow from reheat steam to three sections of extraction steam under the pure condensation condition;

(5) Using formula M _3-ip ＝M _zr-3 -M ₃ Calculating the steam flow from the reheat steam to the three-section extraction steam and the three-section extraction steam under the pure condensation condition to obtain the steam flow from the three-section extraction steam to the medium-pressure cylinder extraction steam under the pure condensation condition;

2. calculating the acting quantity of steam in each stage of the high and medium pressure cylinders of the steam turbine:

(6) Using formula W _z-t ＝M _z-t ×(H _z -H _t ) 3.6, calculating the main steam flow, the main steam enthalpy and the regulating level enthalpy of the steam turbine under the pure condensation condition to obtain the acting quantity of the main steam to the regulating level under the pure condensation condition;

(7) Using formula W _t-1 ＝M _t-1 ×(H _t -H ₁ ) 3.6, calculating the steam flow, the enthalpy of the regulating stage and the enthalpy of the first section of extraction steam under the pure condensation condition to obtain the acting quantity of the regulating stage to the first section of extraction steam under the pure condensation condition;

(8) Using formula W _1-g ＝M _1-g ×(H ₁ -H _g ) 3.6, calculating the steam flow from the first section of steam extraction to the high-pressure cylinder steam extraction, the first section of steam extraction enthalpy and the high-pressure cylinder steam extraction enthalpy under the pure condensation working condition to obtain the power of the first section of steam extraction to the high-pressure cylinder steam extraction;

(9) Using formula W _zr-3 ＝M _zr-3 ×(H _zr -H ₃ ) 3.6, calculating the steam flow, the enthalpy of the reheat steam and the three-section extraction steam under the pure condensation condition, and obtaining the work load of the reheat steam to the three-section extraction steam under the pure condensation condition;

(10) Using formula W _3-ip ＝M _3-ip ×(H ₃ -H _ip ) 3.6, calculating the steam flow, the three-section steam extraction enthalpy and the medium pressure cylinder steam extraction enthalpy of the three-section steam extraction to the medium pressure cylinder steam extraction under the pure condensation working condition to obtain the work load of the three-section steam extraction to the medium pressure cylinder steam extraction under the pure condensation working condition;

3. work doing amounts of high, medium and low pressure cylinders of the steam turbine are calculated respectively, and the work doing amounts of the low pressure cylinders are folded into corresponding power of the generator:

(11) Using formula W _HP ＝W _z-t +W _t-1 +W _1-g Calculating the acting quantity of main steam to the regulating stage, the acting quantity of the regulating stage to one section of extraction steam and the acting quantity of one section of extraction steam to the high-pressure cylinder under the pure condensation working condition to obtain the acting quantity of the high-pressure cylinder under the pure condensation working condition;

(12) Using formula W _IP ＝W _zr-3 +W _3-ip Calculating the power of the reheat steam to the three-section extraction steam and the power of the three-section extraction steam to the medium pressure cylinder exhaust steam under the pure condensation working condition to obtain the medium pressure cylinder power under the pure condensation working condition;

(13) Using formula W _LP ＝W _e /(η _m ·η _e )-W _HP -W _IP Calculating the work done by the high-pressure cylinder, the work done by the medium-pressure cylinder, the power of the turbo generator unit, the efficiency of the turbo generator unit and the mechanical efficiency of the turbo generator unit under the pure condensation working condition to obtain the work done by the low-pressure cylinder under the pure condensation working condition;

(14) Using formula W _LP-e ＝W _LP ×η _m ×η _e And calculating the work done by the low-pressure cylinder, the power of the turbo-generator unit, the efficiency of the turbo-generator unit and the mechanical efficiency of the turbo-generator unit under the pure condensation working condition, and obtaining the power of the turbo-generator unit corresponding to the work done by the low-pressure cylinder under the pure condensation working condition.

wherein ,W_LP Indicating the work load of the low-pressure cylinder under the pure condensation working condition; w (W) _e Representing the power of the steam turbine generator unit under the pure condensation condition; η (eta) _m Representing the mechanical efficiency of the turbo generator set under the pure condensation condition; η (eta) _e Representing the efficiency of the steam turbine generator unit under the pure condensation condition; w (W) _HP Indicating the work load of the high-pressure cylinder under the pure condensation working condition; w (W) _IP Indicating the work load of the medium pressure cylinder under the pure condensation working condition; w (W) _LP-e Representing the power of the turbo generator unit corresponding to the acting quantity of the low-pressure cylinder under the pure condensation working condition; w (W) _z-t Representing the acting quantity of main steam under the pure condensation condition after reaching the regulation stage; w (W) _t-1 Representing the work from the regulating stage to one section of extraction under the pure condensation conditionAn amount of; w (W) _1-g Representing the acting quantity from one section of steam extraction to the steam extraction of the high-pressure cylinder; w (W) _zr-3 Indicating the work load of reheating steam to three sections of extraction steam under the pure condensation working condition; w (W) _3-ip Representing the work load of three sections of steam extraction to the medium-pressure cylinder for steam extraction under the pure condensation working condition; m is M _z-t Representing the main steam flow of the steam turbine under the pure condensation condition; h _z Representing the main vapor enthalpy under pure condensation conditions; h _t Representing the regulating-stage enthalpy under the pure condensation condition; m is M _t-1 Representing the steam flow from the regulating stage to one section of extraction steam under the pure condensation condition; h ₁ Representing the first section of vapor extraction enthalpy under the pure condensation condition; m is M _1-g Representing the steam flow from one section of steam extraction to the steam extraction of the high-pressure cylinder; h _g Representing the exhaust enthalpy of the high-pressure cylinder; m is M _zr-3 Representing the steam flow from reheat steam to three sections of extraction steam under the pure condensation condition; h _zr Representing the enthalpy of reheat steam under pure condensing conditions; h ₃ Representing three sections of vapor extraction enthalpy under the pure condensation condition; m is M _3-ip Representing the steam flow from three-stage steam extraction to medium-pressure cylinder steam extraction under the pure condensation condition; h _ip Representing the vapor exhaust enthalpy of the medium pressure cylinder under the pure condensation condition; m is M _z Representing the main steam flow under the pure condensation condition; m is M _hm The steam leakage quantity of the high-pressure door rod under the pure condensation condition is represented; m is M _z-t Representing the flow rate of the main steam to the steam after the regulating stage under the pure condensation condition; m is M _gq Representing the flow of the regulating stage leaked steam to the medium pressure cylinder under the pure condensation condition; m is M _t-1 Representing the steam flow from the regulating stage to one section of extraction steam under the pure condensation condition; m is M ₁ Representing a section of steam extraction flow under the pure condensation condition; m is M _zr Representing reheat steam flow under pure condensing conditions; m is M _im Representing the steam leakage quantity of the medium-pressure door rod under the pure condensation working condition; m is M ₃ And the three-section steam extraction flow under the pure condensation condition is shown.

S500, obtaining the power of the turbo generator set after the back pressure change under the heat supply working condition based on the change value of the power of the turbo generator set after the back pressure change under the heat supply working condition and the power of the turbo generator set under the heat supply working condition;

and S600, obtaining the heat consumption rate of the turbo generator set after the back pressure change under the heat supply working condition based on the change value of the power of the turbo generator set after the back pressure change under the heat supply working condition, the power of the turbo generator set after the back pressure change under the heat supply working condition and the heat consumption rate of the turbo generator set under the heat supply working condition.

It should be noted that the power change of the turbo generator set is inversely related to the heat rate change.

According to the embodiment of the invention, the correction coefficient of the back pressure of the pure condensation working condition to the correction coefficient of the back pressure of the heat supply working condition to the power is converted based on the principle that the influence of the back pressure change to the turbine is on the change of the work load of the low pressure cylinder, the output of the low pressure cylinder in the steam extraction heat supply working condition is separated and then corrected, the influence of the back pressure change to the power of the turbo generator set under the heat supply working condition is obtained, and finally the influence of the back pressure change to the heat consumption rate is further obtained through the inverse relation between the power change of the turbo generator set and the heat consumption rate, so that the power and the heat consumption rate of the turbo generator set under the heat supply working condition can be accurately calculated, and a user can judge the running economy of the turbo generator set under the heat supply working condition.

Optionally, the step S200 may specifically further include the following steps:

calculating the correction coefficient of the power of the turbo generator unit by utilizing the formula (1) and the power of the turbo generator unit under the pure condensation working condition and the preset back pressure change to obtain the change value of the power of the turbo generator unit after the back pressure change under the pure condensation working condition;

ΔW＝W _e ×θ _e /100 (1)；

Wherein DeltaW represents a variation value of the power of the steam turbine generator unit after the back pressure is changed under the pure condensation condition; w (W) _e Representing the power of the steam turbine generator unit under the pure condensation condition; θ _e And the correction coefficient of the preset back pressure change to the power of the steam turbine generator unit is represented.

For ease of understanding, the following is illustrative:

assuming that the power of the turbo generator set under the pure condensation working condition is 660014kW, presetting the correction coefficient of the back pressure change to the power of the turbo generator set to be-1.92, and then substituting the correction coefficient into a formula (1) for calculation: 660014 (-1.92/100) = -12672.27kW, and calculating the change value of the power of the turbo generator set after the back pressure change under the pure condensation condition to be-12672.27 kW. Namely: under the pure condensing condition, the power of the steam turbine generator unit is reduced by 12672.27kW due to the increase of back pressure.

In this embodiment, by calculating the correction coefficient of the turbo generator set power by using the formula (1) for the turbo generator set power and the back pressure change under the pure condensation condition, the change value of the turbo generator set power after the back pressure change under the pure condensation condition can be accurately calculated.

Optionally, the step S300 may specifically further include the following steps:

calculating a change value of the power of the turbo generator set after the back pressure change under the pure condensation working condition and the power of the turbo generator set corresponding to the low-pressure cylinder acting quantity under the pure condensation working condition by utilizing a formula (2), so as to obtain a change coefficient of the power of the turbo generator set corresponding to the low-pressure cylinder acting;

For ease of understanding, the following is illustrative:

assuming that the variation value of the power of the turbo generator set after the back pressure is changed under the pure condensation working condition is-12672.27 kW, and the power of the turbo generator set corresponding to the low-pressure cylinder working capacity under the pure condensation working condition is 307052.34kW, substituting the power into the formula (2) for calculation: -12672.27/307052.34 x 100= -4.13%, and calculating a change coefficient of the turbo generator set power corresponding to the low-pressure cylinder working to be-4.13%. Namely: and under the heating working condition, the correction coefficient of the back pressure to the power of the steam turbine generator unit is-4.13%.

In this embodiment, by calculating the change value of the turbo generator set power after the back pressure change and the turbo generator set power corresponding to the low-pressure cylinder working amount under the pure condensation condition by using the formula (2), the change coefficient of the generator power after the back pressure change relative to the generator set power corresponding to the low-pressure cylinder working amount can be accurately calculated.

Optionally, the step S400 may specifically further include the following steps:

calculating the change coefficient of the turbo generator set power corresponding to the low-pressure cylinder acting and the turbo generator set power corresponding to the low-pressure cylinder acting amount under the heating working condition by utilizing a formula (3) to obtain a change value of the turbo generator set power after the back pressure under the heating working condition is changed;

wherein ,ΔW^gr The variation value of the power of the turbo generator set after the back pressure is changed under the heating working condition is represented;the power of the turbo generator unit corresponding to the acting quantity of the low-pressure cylinder under the heating working condition is represented; θ _LP-e And the change coefficient of the power of the turbo generator set corresponding to the work of the low-pressure cylinder is represented.

In this embodiment, the following is exemplified:

assuming that the power of the turbo generator set corresponding to the working quantity of the low-pressure cylinder under the heating working condition is 221161.04kW, the change coefficient of the power of the turbo generator set corresponding to the working of the low-pressure cylinder is-4.13%, and then substituting the change coefficient into a formula (3) for calculation: 221161.04 (-4.13/100) = -9127.47kW, and calculating the change value of the power of the turbo generator set after the back pressure change under the heating working condition to be-9127.47 kW. Namely: under the heating working condition, the power of the steam turbine generator unit is reduced by 9127.47kW due to the increase of the back pressure.

In this embodiment, by calculating the change coefficient of the power of the turbo generator set corresponding to the low-pressure cylinder working capacity by using the formula (3) for the back pressure change and the power of the turbo generator set corresponding to the low-pressure cylinder working capacity under the heating working condition, the change value of the power of the turbo generator set after the back pressure change under the heating working condition can be accurately calculated.

Optionally, the step S500 may specifically further include the following steps:

calculating a variation value of the power of the turbo generator set after the back pressure is changed under the heat supply working condition and the power of the turbo generator set under the heat supply working condition by utilizing a formula (4), so as to obtain the power of the turbo generator set after the back pressure is changed under the heat supply working condition;

wherein ,the power of the turbo generator set after the back pressure change under the heating working condition is represented; />The power of the steam turbine generator unit under the heating working condition is represented; ΔW (delta W) ^gr And the variation value of the power of the turbo generator set after the back pressure is changed under the heating working condition is represented.

For ease of understanding, the following is illustrative:

assuming that the power of the turbo generator set under the heating working condition is 622958kW, the change value of the power of the turbo generator set after the back pressure change under the heating working condition is-9127.47 kW, and then substituting the change value into a formula (4) for calculation: 622958+ (-9127.47) = 613830.53kW, and the power of the turbo generator set after the back pressure change under the heating working condition is calculated to be 613830.53kW.

In this embodiment, the change value of the turbo generator set power after the back pressure change under the heating condition and the turbo generator set power are calculated by using the formula (4), so that the turbo generator set power after the back pressure change under the heating condition can be accurately calculated.

Optionally, the step S600 may specifically further include the following steps:

calculating a variation value of the power of the turbo generator set after the back pressure is changed under the heat supply working condition, the power of the turbo generator set under the heat supply working condition and the heat consumption rate of the turbo generator set under the heat supply working condition by utilizing the formula (5), so as to obtain the heat consumption rate of the turbo generator set after the back pressure is changed under the heat supply working condition;

For ease of understanding, the following is illustrative:

assuming that the heat consumption rate of the turbo generator set before back pressure change under the heat supply working condition is 7500kJ/kWh, the power of the turbo generator set under the heat supply working condition is 622958kW, the change value of the power of the turbo generator set after back pressure change under the heat supply working condition is-9127.47 kW, and then substituting the change value into the formula (5) for calculation: 7500 (1- (-9127.47/622958))=7610 kJ/kWh, and the heat consumption rate of the steam turbine generator unit after the back pressure change under the heating working condition is calculated to be 7610kJ/kWh.

In this embodiment, by calculating the change value of the turbo generator set power, the turbo generator set power and the turbo generator set heat rate after the back pressure change under the heating condition by using the formula (5), the turbo generator set heat rate after the back pressure change under the heating condition can be accurately calculated

the first step: acquiring back pressure of the back extractor under a pure condensation condition;

and a second step of: and obtaining a correction coefficient of the preset back pressure change to the power of the steam turbine generator unit based on the preset pure condensing condition back pressure correction curve and the back pressure of the back extractor under the pure condensing condition.

The preset pure condensation working condition back pressure correction curve is used for representing the relation between the back pressure and the correction coefficient of the power of the steam turbine generator unit. After the back pressure correction curve of the preset pure condensation working condition is read, the relation between the back pressure and the correction coefficient of the power of the turbo generator set is obtained as shown in the following table 1.

TABLE 1 correction coefficient parameter Table of backpressure versus Power

Specifically, after the back pressure of the back extractor is obtained, the correction coefficient of the back pressure change to the power of the turbo generator set is queried according to table 1.

In the embodiment, the preset pure condensation working condition back pressure correction curve is perfect, so that the correction coefficient of the back pressure change under the pure condensation working condition to the power of the steam turbine generator unit can be accurately inquired through the preset pure condensation working condition back pressure correction curve, and effective guarantee is provided for the accuracy of the subsequent calculation process.

In order to facilitate a better understanding of the present invention, a specific example is given below for the purpose of detailed description:

taking a turbo generator set of a certain domestic thermal power plant as a 660MW supercritical unit as an example, as shown in table 1, table 1 shows thermal performance parameters of the turbo generator set under pure condensation working conditions and heating working conditions.

/>

TABLE 2 thermal performance parameter table for pure condensing conditions

Referring to table 2, specific calculation procedures are given:

(1) 1868.90-5.79= 1863.11, i.e.: the flow rate of the main steam under the pure condensation condition to the steam after the regulation stage is 1863.11t/h;

(2) 1863-24.21= 1838.9, i.e.: regulating the steam flow of the stage to 1838.9t/h;

(3) 1838.9-121.20 = 1717.7, i.e.: the steam flow from the first section of steam extraction to the high-pressure cylinder steam discharge under the pure condensation condition is 1717.7t/h;

(4) 1561.84- (-4.77) +24.21= 1590.82, i.e.: the steam flow from the reheat steam to the three sections of extraction steam under the pure condensing condition is 1590.82t/h;

(5) 1590.82-68.23= 1522.59, i.e.: the steam flow from three sections of steam extraction to the medium pressure cylinder under the pure condensation condition is 1522.59t/h;

(6) 1863.11 (3398.80-3334.93)/3.6= 33054.74, i.e.: the work load from the main steam under the pure condensation condition to the regulating stage is 33054.74kW;

(7) 1838.9 (3334.93-3081.80)/3.6= 129300.69, i.e.: the work load from the regulating stage to the first section of extraction under the pure condensation condition is 129300.69kW;

(8) 1717.7 (3081.80-2991.20)/3.6= 43229.03, i.e.: the work load from the first section of steam extraction to the high-pressure cylinder steam extraction is 43229.03kW;

(9) 1590.82 (3596.00-3415.20)/3.6= 79894.42, i.e.: the work load of reheating steam to three sections of extraction steam under the pure condensation condition is 79894.42kW;

(10) 1522.59 (3415.20-3223.40)/3.6= 81120.38, i.e.: the work load from three sections of steam extraction to the medium-pressure cylinder steam discharge under the pure condensation condition is 81120.38kW;

(11) 33054.74+129300.69+43229.03= 205584.46, i.e.: the work load of the high-pressure cylinder under the pure condensation working condition is 205584.46kW;

(12) 79894.42+81120.38= 161014.80, i.e.: the work load of the medium pressure cylinder under the pure condensation working condition is 161014.80kW;

(13) 660014.00/(98.900×99.700) -205584.46-161014.80 = 302763.74, i.e.: the work load of the low-pressure cylinder under the pure condensation working condition is 302763.74kW;

(14) 302763.74 x 98.900 x 99.700= 307052.34, i.e.: the power of the turbo generator set corresponding to the acting quantity of the low-pressure cylinder under the pure condensation working condition is 307052.34kW;

4. and calculating a generator power change value after the back pressure change according to a correction curve of the pure condensation working condition back pressure to the generator power:

(15) 660014 (-1.92/100) = -12672.27, i.e.: the change value of the power of the turbo generator set after the back pressure is changed under the pure condensation condition is-12672.27 kW;

5. converting the generator power change value after the back pressure of the pure condensation working condition is changed into a change coefficient of the generated power corresponding to the low-pressure cylinder acting:

(16) -12672.27/307052.34 x 100= -4.13%, i.e.: the change coefficient of the power of the turbo generator set corresponding to the low-pressure cylinder acting is-4.13%;

6. calculating a generator power change value after the back pressure of the heating working condition is changed according to a change coefficient of the power of the steam turbine generator unit corresponding to the low-pressure cylinder acting:

(17) 221161.04 (-4.14/100) = -9127.47, i.e.: the change value of the power of the turbo generator set after the back pressure is changed under the heating working condition is-9127.47 kW;

7. calculating the power of the generator after the back pressure of the heating working condition is corrected:

(18) 622958+ (-9127.47) = 613830.53, i.e.: the power of the turbo generator set after the back pressure change under the heating working condition is 613830.53kW;

8. and correcting and calculating after back pressure change is carried out on the heat rate of the heat-supply working condition steam turbine:

(19) 7500 x (1- (-9127.47/622958))=7610 kJ/kWh, i.e.: the heat consumption rate of the turbo generator set after the back pressure change under the heating working condition is 7610kJ/kWh.

It should be noted that, the above calculation is the turbo generator set power after the back pressure change and the turbo generator set heat consumption rate after the back pressure change under the maximum steam extraction and heat supply working conditions, if the calculation is needed under other heat supply working conditions, the calculation can be performed by referring to the steps (1) - (19), and the details are not repeated here.

After the turbo generator power after the back pressure change under the heating working condition and the turbo generator heat rate after the back pressure change under the heating working condition are calculated, the turbo generator power correction coefficient under the heating working condition is obtained by dividing the turbo generator power difference after the back pressure change under the heating working condition by the turbo generator power (613830.53-622958.00)/622958.00 = -1.47%, the turbo generator heat rate correction coefficient under the heating working condition is obtained by dividing the turbo generator heat rate difference after the back pressure change under the heating working condition by the turbo generator heat rate (7610-7500)/7500=1.47%, and finally the turbo generator heat rate correction coefficient under the heating working condition is calculated, and the power correction coefficient and the heat rate coefficient after different back pressures change under the heating working condition are calculated, so as to construct the graphs shown in fig. 4 and 5.

As can be seen from fig. 4 and fig. 5, after the back pressure changes, the correction coefficient of the power and the heat consumption rate of the turbo generator set under the pure condensation working condition is maximum, the rated steam extraction and heat supply working condition is inferior, and the correction coefficient of the maximum steam extraction and heat supply working condition is minimum. The low-pressure cylinder work doing proportion is gradually reduced along with the increase of the heat supply quantity of the extracted steam, so that the influence of the power and the heat consumption rate of the back pressure steam turbine generator unit is smaller and smaller.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a power and heat consumption rate calculating device of a turbo generator set according to an embodiment of the present application.

Based on the same inventive concept, the embodiment of the present application further provides a turbo generator set power and heat consumption rate calculating device 200, which includes:

the data acquisition module 210 is configured to acquire turbo generator set power corresponding to the turbo generator set power and the low-pressure cylinder working capacity under the heating condition and the pure condensation condition, and turbo generator set heat consumption rate under the heating condition;

the first power calculation module 220 is configured to obtain a change value of the turbo generator set power after the back pressure change under the pure condensation condition, based on the turbo generator set power under the pure condensation condition and a correction coefficient of the preset back pressure change on the turbo generator set power;

The coefficient calculation module 230 is configured to obtain a change coefficient of the turbo generator set power corresponding to the low-pressure cylinder acting based on the turbo generator set change value after the back pressure change under the pure condensation condition and the turbo generator set power corresponding to the low-pressure cylinder acting under the pure condensation condition;

the second power calculation module 240 is configured to obtain a change value of the turbo generator set power after the back pressure change under the heating condition based on a change coefficient of the turbo generator set power corresponding to the low-pressure cylinder acting and the turbo generator set power corresponding to the low-pressure cylinder acting under the heating condition;

the power correction module 250 is configured to obtain the turbo generator set power after the back pressure change under the heating condition based on the change value of the turbo generator set power after the back pressure change under the heating condition and the turbo generator set power under the heating condition;

the heat rate correction module 260 is configured to obtain a heat rate of the turbo-generator set after the back pressure under the heating condition changes based on the change value of the power of the turbo-generator set after the back pressure under the heating condition changes, and the heat rate of the turbo-generator set under the heating condition.

It should be understood that, the apparatus corresponds to the above embodiment of the method for calculating the power and the heat rate of the turbo generator set, and can perform the steps related to the above embodiment of the method, and specific functions of the apparatus may be referred to the above description, and detailed descriptions thereof are omitted herein for avoiding repetition. The device includes at least one software functional module that can be stored in memory in the form of software or firmware (firmware) or cured in an Operating System (OS) of the device.

Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, including: the system comprises a processor and a memory, wherein the memory stores machine-readable instructions executable by the processor, and the machine-readable instructions execute the turbo generator set power and heat consumption rate calculation method when executed by the processor.

The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.

The embodiments of the present invention also provide a computer readable storage medium having stored thereon instructions for, when executed by a processor, performing a program adapted to perform the method steps of: respectively acquiring the power of the turbo generator set corresponding to the power of the turbo generator set and the work done by the low-pressure cylinder under the heat supply working condition and the pure condensation working condition and the heat consumption rate of the turbo generator set under the heat supply working condition; based on the correction coefficient of the turbine generator unit power under the pure condensation working condition and the preset back pressure change to the turbine generator unit power, obtaining the change value of the turbine generator unit power after the back pressure change under the pure condensation working condition; based on the turbine generator set variation value after the back pressure variation under the pure condensation working condition and the turbine generator set power corresponding to the low-pressure cylinder working capacity under the pure condensation working condition, obtaining the turbine generator set power variation coefficient corresponding to the low-pressure cylinder working; based on the change coefficient of the turbo generator set power corresponding to the low-pressure cylinder acting and the turbo generator set power corresponding to the low-pressure cylinder acting amount under the heating working condition, obtaining the change value of the turbo generator set power after the back pressure change under the heating working condition; obtaining the power of the turbo generator set after the back pressure change under the heat supply working condition based on the change value of the power of the turbo generator set after the back pressure change under the heat supply working condition and the power of the turbo generator set under the heat supply working condition; and obtaining the heat consumption rate of the turbo generator set after the back pressure change under the heat supply working condition based on the change value of the power of the turbo generator set after the back pressure change under the heat supply working condition, the power of the turbo generator set after the back pressure change under the heat supply working condition and the heat consumption rate of the turbo generator set under the heat supply working condition.

In one embodiment, the method for calculating the power and the heat rate of the turbo generator set further includes: calculating the correction coefficient of the power of the turbo generator unit by utilizing the formula (1) and the power of the turbo generator unit under the pure condensation working condition and the preset back pressure change to obtain the change value of the power of the turbo generator unit after the back pressure change under the pure condensation working condition; Δw=w _e ×θ _e 100 (1); wherein DeltaW represents a variation value of the power of the steam turbine generator unit after the back pressure is changed under the pure condensation condition; w (W) _e Representing the power of the steam turbine generator unit under the pure condensation condition; θ _e And the correction coefficient of the preset back pressure change to the power of the steam turbine generator unit is represented.

In one embodiment, the method for calculating the power and the heat rate of the turbo generator set further includes: calculating the variation value of the power of the turbo generator set after the back pressure variation under the pure condensation working condition and the power of the turbo generator set corresponding to the working quantity of the low-pressure cylinder under the pure condensation working condition by utilizing the formula (2) to obtain the working of the low-pressure cylinderThe corresponding change coefficient of the power of the turbo generator set; wherein ,θ_LP-e Representing the change coefficient of the power of the turbo generator set corresponding to the work of the low-pressure cylinder; Δw represents a value of a change in power of the turbo generator set after the back pressure under the pure condensation condition changes; w (W) _LP-e And the power of the turbo generator unit corresponding to the acting quantity of the low-pressure cylinder under the pure condensation working condition is represented.

In one embodiment, the method for calculating the power and the heat rate of the turbo generator set further includes: calculating the change coefficient of the turbo generator set power corresponding to the low-pressure cylinder acting and the turbo generator set power corresponding to the low-pressure cylinder acting amount under the heating working condition by utilizing a formula (3) to obtain a change value of the turbo generator set power after the back pressure under the heating working condition is changed; wherein ,ΔW^gr The variation value of the power of the turbo generator set after the back pressure is changed under the heating working condition is represented; />The power of the turbo generator unit corresponding to the acting quantity of the low-pressure cylinder under the heating working condition is represented; θ _LP-e And the change coefficient of the power of the turbo generator set corresponding to the work of the low-pressure cylinder is represented.

In one embodiment, the method for calculating the power and the heat rate of the turbo generator set further includes: calculating a variation value of the power of the turbo generator set after the back pressure is changed under the heat supply working condition and the power of the turbo generator set under the heat supply working condition by utilizing a formula (4), so as to obtain the power of the turbo generator set after the back pressure is changed under the heat supply working condition; wherein ,/>Indicating back pressure change under heating condition The power of the turbo generator set; />The power of the steam turbine generator unit under the heating working condition is represented; ΔW (delta W) ^gr And the variation value of the power of the turbo generator set after the back pressure is changed under the heating working condition is represented. />

In one embodiment, the method for calculating the power and the heat rate of the turbo generator set further includes: calculating a variation value of the power of the turbo generator set after the back pressure is changed under the heat supply working condition, the power of the turbo generator set under the heat supply working condition and the heat consumption rate of the turbo generator set under the heat supply working condition by utilizing the formula (5), so as to obtain the heat consumption rate of the turbo generator set after the back pressure is changed under the heat supply working condition; wherein ,/>The heat consumption rate of the turbo generator set after the back pressure change under the heating working condition is represented; />The heat consumption rate of the steam turbine generator unit under the heating working condition is represented; />And the power of the steam turbine generator unit under the heating working condition is represented.

In one embodiment, the method for calculating the power and the heat rate of the turbo generator set further includes: acquiring back pressure of the back extractor under a pure condensation condition; and obtaining a correction coefficient of the preset back pressure change to the power of the steam turbine generator unit based on the preset pure condensing condition back pressure correction curve and the back pressure of the back extractor under the pure condensing condition.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, various possible combinations of embodiments of the present application are not described in detail.

In addition, the functional modules in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims

1. The method for calculating the power and the heat rate of the steam turbine generator unit is characterized by comprising the following steps of:

2. The method for calculating the power and the heat rate of a turbo generator set according to claim 1, wherein the obtaining the variation value of the turbo generator set power after the back pressure variation under the pure condensation condition based on the correction coefficient of the turbo generator set power by the turbo generator set power under the pure condensation condition and the preset back pressure variation includes:

ΔW＝W _e ×θ _e /100(1)；

3. The method for calculating the power and the heat consumption rate of the turbo generator set according to claim 1, wherein the obtaining the change coefficient of the turbo generator set power corresponding to the low-pressure cylinder work based on the turbo generator set change value after the back pressure change under the pure condensation condition and the turbo generator set power corresponding to the low-pressure cylinder work under the pure condensation condition includes:

4. The method for calculating the power and the heat consumption rate of the turbo generator set according to claim 1, wherein the obtaining the change value of the turbo generator set power after the back pressure change under the heating condition based on the change coefficient of the turbo generator set power corresponding to the low-pressure cylinder work and the turbo generator set power corresponding to the low-pressure cylinder work under the heating condition includes:

wherein ,ΔW^gr Representation ofA variation value of the power of the turbo generator set after the back pressure under the heating working condition is changed;the power of the turbo generator unit corresponding to the acting quantity of the low-pressure cylinder under the heating working condition is represented; θ _LP-e And the change coefficient of the power of the turbo generator set corresponding to the work of the low-pressure cylinder is represented.

5. The method for calculating the power and the heat consumption rate of the turbo generator set according to claim 1, wherein the obtaining the power of the turbo generator set after the back pressure change under the heating condition based on the change value of the power of the turbo generator set after the back pressure change under the heating condition and the power of the turbo generator set under the heating condition includes:

6. The method for calculating the power and the heat rate of a turbo generator set according to claim 1, wherein the obtaining the heat rate of the turbo generator set after the back pressure change under the heating condition based on the change value of the power of the turbo generator set after the back pressure change under the heating condition, and the heat rate of the turbo generator set under the heating condition includes:

wherein ,the heat consumption rate of the turbo generator set after the back pressure change under the heating working condition is represented; />The heat consumption rate of the steam turbine generator unit under the heating working condition is represented; w (W) _e ^gr And the power of the steam turbine generator unit under the heating working condition is represented.

7. The method for calculating the power and the heat rate of the turbo generator set according to claim 1, wherein the correction coefficient of the power of the turbo generator set by the preset back pressure change is obtained by:

8. A turbo-generator set power and heat rate calculation apparatus, comprising:

9. An electronic device, comprising: a processor and a memory storing machine readable instructions executable by the processor, which when executed by the processor, perform the turbo-generator set power and heat rate calculation method of any one of claims 1-7.

10. A computer readable storage medium storing computer instructions which, when run on a computer, cause the computer to perform the turbo-generator set power and heat rate calculation method of any one of claims 1 to 7.