A method and device for testing the flow characteristics of a valve

Abstract

The application relates to the technical field of automatic control, and discloses a valve flow characteristic test calculation method and device, wherein the initial equivalent actual flow of each group of collected data, the target equivalent actual flow of each group of collected data, and the deviation absolute value between the target equivalent actual flow of each group of collected data and the total valve position instruction parameter output by a total valve position instruction module are further calculated, and whether each unit parameter and each module parameter in the valve flow characteristic function logical structure need to be modified is determined through the deviation absolute value, so that the load control effect of the unit can be ensured, the automatic power generation control performance of the unit can be improved, the valve flow test verification of the unit can be timely performed and the valve flow can be modified, the unit can be ensured to be always in the excellent working condition of AGC control and primary frequency modulation, and the economic index of the unit can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic control, and particularly relates to a valve flow characteristic test calculation method and device. BACKGROUND

[0002] The purpose of the steam turbine valve flow characteristic test is to check the consistency of the steam turbine equivalent flow curve and the ideal flow curve, to obtain the linear relationship between the DEH flow instruction of the digital electric hydraulic control system (DHE) and the equivalent actual flow through the test data, and to perform flow linear correction if necessary, and to fit a reasonable valve flow curve.

[0003] The valve flow characteristic test is very important for power generation enterprises, but there are two problems. The first problem is that the unit valve flow characteristic curve is given by the main machine factory when the unit is delivered, but the internal wear and tear and routine maintenance of the valve during actual operation change the flow-through performance of the valve. If the previous valve flow characteristic function is continued, the deviation between the unit equivalent actual flow and the ideal curve will occur, and the linearity of the unit steam flow and the opening degree of the valve will be poor. When the steam turbine valve flow characteristic and the function matching degree are poor, the load control effect of the unit cannot be guaranteed, and the automatic generation control (AGC) control performance and primary frequency modulation quality of the unit are affected. Therefore, the valve flow characteristic of the unit should be tested and verified after the unit has been operated for a period of time or the valve is maintained. The second problem is that the valve flow characteristic test generally needs to be completed by professional test personnel, and most tests need to be signed a contract separately. The whole test process and the time for issuing the report are long. Therefore, when the equivalent actual flow of the unit and the ideal curve deviate greatly, the power generation enterprise cannot timely perform the valve flow test verification of the unit and modify the valve flow, so that the unit is always in the poor working condition of AGC control and primary frequency modulation, and the economic indicators of the unit are affected. SUMMARY

[0004] Therefore, the present application provides a valve flow characteristic test calculation method and device to solve the problem that when the steam turbine valve flow characteristic and the function matching degree are poor, the load control effect of the unit cannot be guaranteed, and the automatic generation control performance and primary frequency modulation quality of the unit are affected, and the economic indicators of the unit are affected.

[0005] According to a first aspect, the embodiments of the present disclosure provide a valve flow characteristic test calculation method, applied to a DEH valve flow function logic structure, the DEH valve flow function logic structure comprising at least one set of valve flow characteristic function logic modules and a total valve position instruction module, the valve flow characteristic function logic module comprising: a total valve position instruction module, a first coefficient unit, a second coefficient unit, a third coefficient unit, a fourth coefficient unit, a fifth coefficient unit, a first flow characteristic function unit, a second flow characteristic function unit, a third flow characteristic function unit, a fourth flow characteristic function unit, a fifth flow characteristic function unit, and a high regulating valve instruction unit, wherein two adjacent flow characteristic function units are connected through a multiplier, each coefficient unit is connected with the corresponding multiplier, the total valve position instruction module is connected with the multiplier corresponding to the first coefficient unit, and the high regulating valve instruction unit is connected with the multiplier corresponding to the fifth coefficient unit, and the method comprises:

[0006] a plurality of sets of acquisition data are obtained, each set of acquisition data comprising: a unit rated main steam pressure, a unit rated regulating pressure, a unit current main steam pressure, and a unit current regulating pressure;

[0007] based on the unit rated main steam pressure, the unit rated regulating pressure, the unit current main steam pressure, and the unit current regulating pressure, an initial equivalent actual flow of each set of acquisition data is calculated;

[0008] based on the initial equivalent actual flow of each set of acquisition data, a target equivalent actual flow per unit of each set of acquisition data is marked;

[0009] an absolute value of a deviation between the target equivalent actual flow of each set of acquisition data and a total valve position instruction parameter output by the total valve position instruction module is calculated;

[0010] whether the absolute value of the deviation is greater than a preset value is determined;

[0011] if the absolute value of the deviation is greater than the preset value, each unit parameter and each module parameter in the valve flow characteristic function logic structure corresponding to the set of acquisition data are sequentially modified in a forward direction;

[0012] in response to the forward modification of each unit parameter in the valve flow characteristic function logic structure, each unit parameter and each module parameter in the valve flow characteristic function logic structure corresponding to the set of acquisition data are sequentially modified in a reverse direction.

[0013] By executing the above embodiments, the present disclosure can not only ensure the load control effect of the unit and improve the automatic generation control performance of the unit, but also can timely perform the valve flow test verification of the unit and modify the valve flow, thereby ensuring that the unit is always in an excellent working condition of AGC control and primary frequency modulation, and further improving the economic indicators of the unit.

[0014] In some alternative embodiments, the calculation method of the valve flow characteristic test in the embodiments of the present disclosure further comprises:

[0015] If the absolute value of the deviation is less than or equal to the preset value, it is determined that each unit parameter and each module parameter in the valve flow characteristic function logical structure belongs to a normal state.

[0016] By executing the above-mentioned embodiments, by determining that the absolute value of the deviation is less than or equal to the preset value, when each unit parameter and each module parameter in the valve flow characteristic function logical structure belongs to a normal state, frequent modification of the parameters in the valve flow characteristic function logical structure is avoided.

[0017] In some alternative embodiments, based on the unit rated main steam pressure, the unit rated regulation pressure, the unit current main steam pressure, and the unit current regulation pressure, the initial equivalent actual flow of each group of collected data is calculated, which is executed by the following formula:

[0018]

[0019] Wherein, P1 is the initial equivalent actual flow of each group of collected data, PT e is the unit rated main steam pressure, PM e is the unit rated regulation pressure, PM1 is the unit current regulation pressure, and PT1 is the unit current main steam pressure.

[0020] In some alternative embodiments, based on the initial equivalent actual flow of each group of collected data, the target equivalent actual flow per unit of each group of collected data is calculated, which is executed by the following formula:

[0021] Q1 = 100 x P1 / P Max

[0022] Wherein, Q1 is the target equivalent actual flow of each group of collected data, P1 is the initial equivalent actual flow of each group of collected data, and P Max is the maximum equivalent flow of each group of collected data.

[0023] In some alternative embodiments, the absolute value of the deviation between the target equivalent actual flow of each group of collected data and the total valve position instruction parameter output by the total valve position instruction module is calculated, which is calculated by the following formula:

[0024] Δ = |Q1-Z1|

[0025] Wherein, Δ is the absolute value of the deviation, Q1 is the target equivalent actual flow of each group of collected data, and Z1 is the total valve position instruction parameter output by the total valve position instruction module.

[0026] By executing the above-mentioned embodiments, the initial equivalent actual flow of each set of collected data, the target equivalent actual flow of each set of collected data, and the absolute value of the deviation between the target equivalent actual flow of each set of collected data and the total valve position instruction parameter output by the total valve position instruction module are further calculated, and finally whether each unit parameter and each module parameter in the valve flow characteristic function logical structure need to be modified is determined.

[0027] According to the second aspect, the embodiments of the present disclosure provide a calculation system for valve flow characteristic test, comprising: a DEH valve flow function logical structure, a data acquisition module, a data processing module, a data storage module and a data output module.

[0028] The DEH valve flow function logical structure comprises at least one set of valve flow characteristic function logical modules and a total valve position instruction module, and the valve flow characteristic function logical module comprises: a first coefficient unit, a second coefficient unit, a third coefficient unit, a fourth coefficient unit, a fifth coefficient unit, a first flow characteristic function unit, a second flow characteristic function unit, a third flow characteristic function unit, a fourth flow characteristic function unit, a fifth flow characteristic function unit, and a high pitch valve instruction unit, wherein two adjacent flow characteristic function units are connected through a multiplier, each coefficient unit is connected with the corresponding multiplier, the total valve position instruction module is connected with the multiplier corresponding to the first coefficient unit, and the high pitch valve instruction unit is connected with the multiplier corresponding to the fifth coefficient unit.

[0029] The data acquisition module is used to acquire the unit parameters and module parameters in the valve flow characteristic function logical structure input manually by the user, the unit rated main steam pressure and the unit rated regulation pressure, and is used to automatically acquire the total valve position instruction, the current unit main steam pressure, the current unit regulation pressure, a plurality of high pitch valve instructions, the current unit load, the furnace negative pressure, the main steam temperature, the feed water flow, the steam drum water level and the steam turbine vibration according to the sampling time.

[0030] The data storage module is used to store a plurality of data acquired manually and automatically by the data acquisition module.

[0031] The data processing module is used to execute the calculation method for valve flow characteristic test in the first aspect or any one of the embodiments of the first aspect.

[0032] The data output module is used to output the modification result obtained by executing the calculation method for valve flow characteristic test in the first aspect or any one of the embodiments of the first aspect.

[0033] In a third aspect, the present application provides a valve flow characteristic test calculation device, which is applied to a DEH valve flow function logic structure, the DEH valve flow function logic structure comprising at least one set of valve flow characteristic function logic modules and a total valve position instruction module, the valve flow characteristic function logic module comprising: a first coefficient unit, a second coefficient unit, a third coefficient unit, a fourth coefficient unit, a fifth coefficient unit, a first flow characteristic function unit, a second flow characteristic function unit, a third flow characteristic function unit, a fourth flow characteristic function unit, a fifth flow characteristic function unit, and a high regulating valve instruction unit, wherein two adjacent flow characteristic function units are connected through a multiplier, each coefficient unit is connected with the corresponding multiplier, the total valve position instruction module is connected with the multiplier corresponding to the first coefficient unit, and the high regulating valve instruction unit is connected with the multiplier corresponding to the fifth coefficient unit, and the device comprises:

[0034] a data acquisition unit, configured to acquire a plurality of sets of acquisition data, each set of acquisition data comprising: a unit rated main steam pressure, a unit rated regulating pressure, a unit current main steam pressure, and a unit current regulating pressure;

[0035] a first calculation unit, configured to calculate an initial equivalent actual flow of each set of acquisition data based on the unit rated main steam pressure, the unit rated regulating pressure, the unit current main steam pressure, and the unit current regulating pressure;

[0036] a data unit, configured to normalize a target equivalent actual flow of each set of acquisition data based on the initial equivalent actual flow of each set of acquisition data;

[0037] a second calculation unit, configured to calculate an absolute value of a deviation between the target equivalent actual flow of each set of acquisition data and a total valve position instruction parameter output by the total valve position instruction module;

[0038] a data judgment unit, configured to judge whether the absolute value of the deviation is greater than a preset value;

[0039] a forward modification unit, configured to sequentially forwardly modify each unit parameter and each module parameter in the valve flow characteristic function logic structure corresponding to the set of acquisition data if the absolute value of the deviation is greater than the preset value;

[0040] a reverse modification unit, configured to sequentially reversely modify each unit parameter and each module parameter in the valve flow characteristic function logic structure corresponding to the set of acquisition data in response to the forward modification of each unit parameter in the valve flow characteristic function logic structure.

[0041] In a fourth aspect, the present application provides a computer device, comprising a memory and a processor, which are communicatively connected with each other, and the memory stores computer instructions, and the processor executes the computer instructions to perform the valve flow characteristic test calculation method of the first aspect or any of the corresponding embodiments.

[0042] In a fifth aspect, the present application provides a computer readable storage medium, which stores computer instructions for making a computer perform the valve flow characteristic test calculation method of the first aspect or any of the corresponding embodiments.

[0043] In a sixth aspect, the present application provides a computer program product, which comprises computer instructions for making a computer perform the valve flow characteristic test calculation method of the first aspect or any of the corresponding embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0045] Figure 1 is a DEH valve flow function logical structure diagram according to the embodiment of the present application;

[0046] Figure 2 is a flowchart of the valve flow characteristic test calculation method according to the embodiment of the present application;

[0047] Figure 3 is a judgment diagram of the valve flow characteristic test calculation method according to the embodiment of the present application;

[0048] Figure 4 is a diagram of modifying each unit parameter and each module parameter in the valve flow characteristic function logical structure corresponding to the set of collected data in the forward direction according to the embodiment of the present application;

[0049] Figure 5 is a diagram of modifying each unit parameter and each module parameter in the valve flow characteristic function logical structure corresponding to the set of collected data in the reverse direction according to the embodiment of the present application;

[0050] Figure 6 is a structure diagram of the valve flow characteristic test calculation system according to the embodiment of the present application;

[0051] Figure 7is a specific flowchart of data collection according to an embodiment of the present application;

[0052] Figure 8 is a structural block diagram of a calculation device for valve flow characteristic test according to an embodiment of the present application;

[0053] Figure 9 is a hardware structure schematic diagram of a computer device according to an embodiment of the present application. DETAILED DESCRIPTION

[0054] To make the objects, technical solutions and advantages of embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0055] According to an embodiment of the present application, a calculation method for valve flow characteristic test is provided. It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from here.

[0056] The calculation method for valve flow characteristic test in the embodiments of the present application is applied to a DEH valve flow function logical structure diagram, the DEH valve flow function logical structure diagram includes at least one set of valve flow characteristic function logical modules and a total valve position instruction module, the valve flow characteristic function logical module includes: a first coefficient unit, a second coefficient unit, a third coefficient unit, a fourth coefficient unit, a fifth coefficient unit, a first flow characteristic function unit, a second flow characteristic function unit, a third flow characteristic function unit, a fourth flow characteristic function unit, a fifth flow characteristic function unit, and a high regulating valve instruction unit, wherein two adjacent flow characteristic function units are connected through a multiplier, each coefficient unit is connected with the corresponding multiplier, the total valve position instruction module is connected with the multiplier corresponding to the first coefficient unit, and the high regulating valve instruction unit is connected with the multiplier corresponding to the fifth coefficient unit.

[0057] Exemplarily, as Figure 1As shown, the DEH valve flow function logic block diagram includes: six sets of valve flow characteristic function logic modules MF, a total valve position command module Z, the first set of valve flow characteristic function logic modules MF includes: a first coefficient unit M11, a second coefficient unit M12, a third coefficient unit M13, a fourth coefficient unit M14, a fifth coefficient unit M15, a first flow characteristic function unit F11(x), a second flow characteristic function unit F12(x), a third flow characteristic function unit F13(x), a fourth flow characteristic function unit F14(x), a fifth flow characteristic function unit F15(x) and a high pitch valve command unit GV1.

[0058] Similarly, the second set of valve flow characteristic function logic modules includes: a first coefficient unit M21, a second coefficient unit M22, a third coefficient unit M23, a fourth coefficient unit M24, a fifth coefficient unit M25, a first flow characteristic function unit F21(x), a second flow characteristic function unit F22(x), a third flow characteristic function unit F23(x), a fourth flow characteristic function unit F24(x), a fifth flow characteristic function unit F25(x) and a high pitch valve command unit GV2.

[0059] Similarly, the third set of valve flow characteristic function logic modules includes: a first coefficient unit M31, a second coefficient unit M32, a third coefficient unit M33, a fourth coefficient unit M34, a fifth coefficient unit M35, a first flow characteristic function unit F31(x), a second flow characteristic function unit F32(x), a third flow characteristic function unit F33(x), a fourth flow characteristic function unit F34(x), a fifth flow characteristic function unit F35(x) and a high pitch valve command unit GV3.

[0060] Similarly, the fourth set of valve flow characteristic function logic modules includes: a first coefficient unit M41, a second coefficient unit M42, a third coefficient unit M43, a fourth coefficient unit M44, a fifth coefficient unit M45, a first flow characteristic function unit F41(x), a second flow characteristic function unit F42(x), a third flow characteristic function unit F43(x), a fourth flow characteristic function unit F44(x), a fifth flow characteristic function unit F45(x) and a high pitch valve command unit GV4.

[0061] Similarly, the fifth set of valve flow characteristic function logic modules includes: a first coefficient unit M51, a second coefficient unit M52, a third coefficient unit M53, a fourth coefficient unit M54, a fifth coefficient unit M55, a first flow characteristic function unit F51(x), a second flow characteristic function unit F52(x), a third flow characteristic function unit F53(x), a fourth flow characteristic function unit F54(x), a fifth flow characteristic function unit F55(x) and a high pitch valve command unit GV5.

[0062] Similarly, the sixth group of valve flow characteristic function logic modules includes: a first coefficient unit M61, a second coefficient unit M62, a third coefficient unit M63, a fourth coefficient unit M64, a fifth coefficient unit M65, a first flow characteristic function unit F61(x), a second flow characteristic function unit F62(x), a third flow characteristic function unit F63(x), a fourth flow characteristic function unit F64(x), a fifth flow characteristic function unit F65(x), and a high gate command unit GV6.

[0063] In the embodiment, a valve flow characteristic test calculation method is provided, which can be used for mobile terminals such as mobile phones, tablet computers, etc. Figure 2 The flowchart of the valve flow characteristic test calculation method according to the embodiment of the present application is shown in FIG. 1, which includes the following steps: Figure 2

[0064] In step S201, a plurality of groups of collected data are obtained, and each group of collected data includes: a unit rated main steam pressure, a unit rated regulating pressure, a unit current main steam pressure, and a unit current regulating pressure.

[0065] Specifically, taking the first group of data as an example, the unit rated main steam pressure, the unit rated regulating pressure, the unit current main steam pressure, and the unit current regulating pressure corresponding to the first group of collected data are obtained.

[0066] In step S202, the initial equivalent actual flow of each group of collected data is calculated based on the unit rated main steam pressure, the unit rated regulating pressure, the unit current main steam pressure, and the unit current regulating pressure.

[0067] In a specific example, the initial equivalent actual flow of each group of collected data is calculated based on the unit rated main steam pressure, the unit rated regulating pressure, the unit current main steam pressure, and the unit current regulating pressure, which is executed by the following formula:

[0068]

[0069] wherein P1 is the initial equivalent actual flow of each group of collected data, PT e is the unit rated main steam pressure, PM e is the unit rated regulating pressure, PM1 is the unit current regulating pressure, and PT1 is the unit current main steam pressure.

[0070] Specifically, the initial equivalent actual flow of each group of collected data is calculated by the above formula for the above example of 2000 groups of data.

[0071] ​Step S203, based on the initial equivalent actual flow of each group of collected data, standardize the target equivalent actual flow of each group of collected data.

[0072] In a specific example, based on the initial equivalent actual flow of each group of collected data, standardize the target equivalent actual flow of each group of collected data, by the following formula:

[0073] Q1 = 100 x P1 / P Max

[0074] Wherein, Q1 is the target equivalent actual flow of each group of collected data, P1 is the initial equivalent actual flow of each group of collected data, P Max is the maximum equivalent flow of each group of collected data.

[0075] Specifically, for the above example of 2000 groups of data, the target equivalent actual flow of each group of collected data is standardized by the above formula. Among them, P Max The ratio between P1 of the first group data of the above example of 2000 groups of data and P1 of the 2000th group data of the 2000 groups of data can be selected.

[0076] Step S204, calculate the absolute value of the deviation between the target equivalent actual flow of each group of collected data and the total valve position instruction parameter output by the total valve position instruction module.

[0077] In a specific example, the absolute value of the deviation between the target equivalent actual flow of each group of collected data and the total valve position instruction parameter output by the total valve position instruction module is calculated, which is calculated by the following formula:

[0078] Δ = |Q1-Z1|

[0079] Wherein, Δ is the absolute value of the deviation, Q1 is the target equivalent actual flow of each group of collected data, Z1 is the total valve position instruction parameter output by the total valve position instruction module.

[0080] Step S205, judge whether the absolute value of the deviation is greater than the preset value.

[0081] Specifically, the preset value here can be 2, and can also be set in combination with the actual situation. For example Figure 3 As shown.

[0082] Step S206, if the absolute value of the deviation is greater than the preset value, the corresponding unit parameters and module parameters in the valve flow characteristic function logical structure corresponding to the group of collected data are modified in turn in the positive direction.

[0083] Specifically, for example, according to the deviation absolute value Δ value to determine whether to need to modify the valve flow characteristic function logic structure in each unit parameter and each module parameter, if 2000 group of data deviation absolute value Δ is greater than 2, the need to modify the valve flow characteristic function logic structure in each unit parameter and each module parameter. As Figure 4 shown.

[0084] Step S207, in response to the forward modification of the valve flow characteristic function logic structure in each unit parameter, in turn reverse modification of the group of data corresponding to the valve flow characteristic function logic structure in each unit parameter and each module parameter.

[0085] Specific as Figure 5 shown, for example, the target equivalent actual flow Q1 after the unit is sent to the data output module through the coefficient M11, F11 (x), the coefficient M12, F12 (x), the coefficient M13, F13 (x), the coefficient M14, F14 (x), the coefficient M15 each step calculation data. Take the first group of data as an example, wherein F11 (x) function is shown in table 1.

[0086] Table 1 F11 (x) function value

[0087] X Y 1 0 0 2 72.03 60.917 3 81 68.99 4 86 74.79 5 91 81.934 6 100 100

[0088] The equivalent actual flow Q1 after the unit is sent to the data output module through the coefficient M11, F11 (x), the coefficient M12, F12 (x), the coefficient M13, F13 (x), the coefficient M14, F14 (x), the coefficient M15 each step calculation data. Take the first group of data as an example, wherein F11 (x) function is shown in table 1.

[0089] b11,b11=TREND(OFFSET(Y,MATCH(a11,X1:X7,1),,2,1),OFFSET(X,MATC H(a11,X1:$X7,1),,2,1),a11),TREND function: according to the known x sequence of value and y sequence of value, construct linear regression straight line equation, then according to the constructed straight line equation, calculate the x value sequence corresponding to y value sequence, for example, when r11=98.76, the calculation method of TREND function is equivalent to the following formula:

[0090]

[0091] The calculation result of the above formula is b11=97.52. As Figure 4 shown, according to the same calculation method, respectively get the value of c11, d11, e11, f11, g11, h11, i11. The calculation method of each parameter in GV2~GV6 is the same as above.

[0092] In the above reverse modification process, the data calculated by each step of reverse calculation of GV1 instruction through coefficient M15, F14(x), coefficient M14, F13(x), coefficient M13, F12(x), coefficient M12, F11(x), coefficient M11 can be sent to the result output module (3). Still taking the first group of data as an example, wherein the F11(x) function is taken as an example shown in Table 1.

[0093] In Figure 5 , o11 passes through coefficient M12 to obtain p11 = o11 / M12. p11 enters the F11(x) function for reverse calculation to obtain the result r11, b11 = TREND(OFFSET(X, MATCH(r11, Y1:Y7, 1),, 2, 1), OFFSET(Y, MATCH(r11, Y1:Y7, 1),, 2, 1), r11). The TREND function: according to the known value of x sequence and the value of y sequence, a linear regression straight line equation is constructed, and then according to the constructed straight line equation, the y value sequence corresponding to the x value sequence is calculated, for example, when p11 = 97.52, the calculation method of the TREND function is equivalent to the following formula:

[0094]

[0095] The calculation result of the above formula is q11 = 98.76. As Figure 5 shown, the values of j11, k11, L11, m11, n11, o11, p11, q11, r11 are obtained through GV1-1 respectively according to the same calculation method. The calculation methods of each parameter in GV2-GV6 are the same as above.

[0096] In some optional embodiments, the calculation method of the valve flow characteristic test in the embodiments of the present disclosure further includes: step S208, if the absolute value of the deviation is less than or equal to the preset value, it is determined that each unit parameter and each module parameter in the valve flow characteristic function logic structure belongs to a normal state.

[0097] To sum up, the calculation method of the valve flow characteristic test in the embodiment of the disclosure is based on the unit rated main steam pressure, the unit rated regulating pressure, the unit current main steam pressure and the unit current regulating pressure to calculate the initial equivalent actual flow of each group of collected data; based on the initial equivalent actual flow of each group of collected data, the target equivalent actual flow of each group of collected data is normalized; the deviation absolute value between the target equivalent actual flow of each group of collected data and the total valve position instruction parameter output by the total valve position instruction module is calculated; it is judged whether the deviation absolute value is greater than the preset value; if the deviation absolute value is greater than the preset value, each unit parameter and each module parameter in the valve flow characteristic function logical structure corresponding to the group of collected data is modified in turn in a positive direction; in response to the positive modification of each unit parameter in the valve flow characteristic function logical structure, each unit parameter and each module parameter in the valve flow characteristic function logical structure corresponding to the group of collected data is modified in turn in a reverse direction. Finally, the application can not only ensure the load control effect of the unit and improve the automatic generation control performance of the unit, but also can timely perform the valve flow test verification of the unit and modify the valve flow, so as to ensure that the unit is always in the excellent working condition of AGC control and primary frequency modulation, and thus improve the economic indicators of the unit.

[0098] Based on the same concept, the embodiment provides a valve flow characteristic test calculation system, Figure 6 The valve flow characteristic test calculation system according to the embodiment of the application comprises a DEH valve flow function logical structure 601, a data collection module 602, a data processing module 603, a data storage module 604 and a data output module 605.

[0099] In Figure 1 The DEH valve flow function logical structure comprises at least one group of valve flow characteristic function logical modules and a total valve position instruction module, the valve flow characteristic function logical module comprises a first coefficient unit, a second coefficient unit, a third coefficient unit, a fourth coefficient unit, a fifth coefficient unit, a first flow characteristic function unit, a second flow characteristic function unit, a third flow characteristic function unit, a fourth flow characteristic function unit, a fifth flow characteristic function unit and a high regulating valve instruction unit, wherein two adjacent flow characteristic function units are connected through a multiplier, each coefficient unit is connected with the corresponding multiplier, the total valve position instruction module is connected with the multiplier corresponding to the first coefficient unit, and the high regulating valve instruction unit is connected with the multiplier corresponding to the fifth coefficient unit.

[0100] Specifically, for the specific schematic of the DEH valve flow function logical structure, refer to the above content, and no longer be described in detail here.

[0101] The data acquisition module 602 is used to acquire the parameters of each unit and module in the logic structure of the valve flow characteristic function manually input by the user, as well as the rated main steam pressure and rated regulating pressure of the unit; and to automatically acquire the total valve position command, the current main steam pressure and the current regulating pressure of the unit, multiple high-pressure valve commands, the current load of the unit, the furnace negative pressure, the main steam temperature, the feedwater flow rate, the steam drum water level, and the turbine vibration according to the sampling time.

[0102] Specifically, such as Figure 7 As shown, the data acquisition module 602 includes manual input and automatic acquisition functions. Manual input parameters include... Figure 1 The functions F11(x), F12(x), F13(x), and F14(x) and their coefficients M11, M12, M13, M14, and M15, and the rated main steam pressure PT of the unit are also mentioned. e Rated regulating pressure of the unit PM e If the valve flow characteristic function logic structure contains only 3 F(x) functions, then only F11(x), F12(x), and F13(x) need to be input. Each function defaults to (-200, -200; 200, 200). Input the coefficients before and after the function if they exist; otherwise, omit them. The default value for M11, M12, M13, M14, and M15 is 1. Automatically collected data includes: sampling time (Time), total valve position command (Z), current main steam pressure (PT1), current regulating pressure (PM1), all high-pressure control valve commands (GV1~GV6), unit load (MW), furnace negative pressure (FP), main steam temperature (MST), feedwater flow rate (FW), drum water level (BL) (if applicable), and turbine vibration (STV). If the unit has only 4 high-pressure control valves, then commands GV1~GV4 are collected. Unit load, furnace negative pressure, main steam pressure, feedwater flow rate, drum water level (if applicable), and turbine vibration are only for reference. The automatic data acquisition sampling period is 1 second, and each group of data is sorted and automatically numbered according to the order of events. Data from manual input and automatic acquisition is sent to the data storage module 604 for processing by the data processing module 603.

[0103] The data processing module 603 is configured to execute the calculation method of the valve flow characteristic test in the above embodiments, that is, the data processing module 603 acquires a plurality of sets of collected data, each set of collected data including: a unit rated main steam pressure, a unit rated regulating pressure, a unit current main steam pressure, and a unit current regulating pressure; calculates an initial equivalent actual flow of each set of collected data based on the unit rated main steam pressure, the unit rated regulating pressure, the unit current main steam pressure, and the unit current regulating pressure; labels a target equivalent actual flow of each set of collected data based on the initial equivalent actual flow of each set of collected data; calculates an absolute value of a deviation between the target equivalent actual flow of each set of collected data and a total valve position instruction parameter output by a total valve position instruction module; determines whether the absolute value of the deviation is greater than a preset value; if the absolute value of the deviation is greater than the preset value, each unit parameter and each module parameter in a valve flow characteristic function logical structure corresponding to the set of collected data are modified in a forward direction in sequence; in response to the modification of each unit parameter in the valve flow characteristic function logical structure in the forward direction being completed, each unit parameter and each module parameter in the valve flow characteristic function logical structure corresponding to the set of collected data are modified in a reverse direction in sequence; and if the absolute value of the deviation is less than or equal to the preset value, it is determined that each unit parameter and each module parameter in the valve flow characteristic function logical structure are in a normal state.

[0104] Specifically, the data processing module 603 executes the above actions, and the process is described in the above embodiments.

[0105] The data storage module 604 is configured to store a plurality of types of data collected manually and automatically by the data collection module.

[0106] Specifically, the data storage module 604 is configured to store a plurality of types of data input manually and collected automatically by the user, and number the data collected automatically in chronological order.

[0107] The data output module 605 outputs a modification result obtained by executing the calculation method of the valve flow characteristic test in the above embodiments.

[0108] Specifically, the data output module can be manually selected by the tester to modify the function, and according to the calculation of the initial equivalent actual flow and the target equivalent actual flow, the forward modification and the reverse modification of the unit parameters and the module parameters in the logical structure of the valve flow characteristic function corresponding to the collected data are performed, and a new fitting function F(x) is given. For example, if the F11(x) function is selected to be modified, the 2000 groups of numbers a11~a12000 are taken as X terms, and p11~p12000 are taken as Y terms, and a new equation is fitted. If the F12(x) function is selected to be modified, the 2000 groups of numbers c11~c12000 are taken as X terms, and n11~n12000 are taken as Y terms, and a new equation is fitted. If the F13(x) function is selected to be modified, the 2000 groups of numbers e11~e12000 are taken as X terms, and L11~L12000 are taken as Y terms, and a new equation is fitted. If the F14(x) function is selected to be modified, the 2000 groups of numbers g11~g12000 are taken as X terms, and j11~j12000 are taken as Y terms, and a new equation is fitted. For the fitting function, a suggested value is given. Still taking the function in Table 1 as an example, if the F11(x) function needs to be modified, the suggested value is shown in Table 2.

[0109] Table 2 F11(x) new function value

[0110] a11~a12000 p11~p12000 1 0 p11 2 72.03 p1800 3 81 p11200 4 86 p11600 5 91 p11800 6 100 p12000

[0111] In all 2000 groups of numbers a11~a12000, the X terms are selected from the positions of (0, 72.03, 81, 86, 91, 100), that is, a11=0, a1800=72.03, a11200=81, a11600=86, a11800=91, a12000=100, and the Y terms are selected from the values corresponding to p11, p1800, p11200, p11600, p11800, p12000. The modification modes of F12(x), F13(x), and F14(x) functions are the same as those of F11(x).

[0112] In the embodiment, a valve flow characteristic test calculation device is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and has been described above and will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware is also possible and is contemplated.

[0113] The embodiment provides a valve flow characteristic test calculation device, as shown in Figure 8 , which includes:

[0114] According to the valve flow characteristic test calculation device provided by the embodiment of the present disclosure, the valve flow characteristic test calculation device is applied to a DEH valve flow function logic structure, the DEH valve flow function logic structure comprises at least one set of valve flow characteristic function logic modules and a total valve position instruction module, the valve flow characteristic function logic module comprises a first coefficient unit, a second coefficient unit, a third coefficient unit, a fourth coefficient unit, a fifth coefficient unit, a first flow characteristic function unit, a second flow characteristic function unit, a third flow characteristic function unit, a fourth flow characteristic function unit, a fifth flow characteristic function unit and a high regulating valve instruction unit, wherein two adjacent flow characteristic function units are connected through a multiplier, each coefficient unit is connected with the corresponding multiplier, the total valve position instruction module is connected with the multiplier corresponding to the first coefficient unit, the high regulating valve instruction unit is connected with the multiplier corresponding to the fifth coefficient unit, and the method comprises the following steps:

[0115] The data acquisition unit 81 is configured to acquire a plurality of sets of acquisition data, and each set of acquisition data comprises: a unit rated main steam pressure, a unit rated regulating pressure, a unit current main steam pressure and a unit current regulating pressure.

[0116] The first calculation unit 82 is configured to calculate an initial equivalent actual flow of each set of acquisition data based on the unit rated main steam pressure, the unit rated regulating pressure, the unit current main steam pressure and the unit current regulating pressure.

[0117] The data unit 83 is configured to standardize a target equivalent actual flow of each set of acquisition data based on the initial equivalent actual flow of each set of acquisition data.

[0118] The second calculation unit 84 is configured to calculate an absolute value of a deviation between the target equivalent actual flow of each set of acquisition data and a total valve position instruction parameter output by the total valve position instruction module.

[0119] The data judgment unit 85 is configured to judge whether the absolute value of the deviation is greater than a preset value.

[0120] The positive modification unit 86 is configured to, if the absolute value of the deviation is greater than the preset value, sequentially and positively modify each unit parameter and each module parameter in the valve flow characteristic function logic structure corresponding to the set of acquisition data.

[0121] The reverse modification unit 87 is configured to, in response to the positive modification of each unit parameter in the valve flow characteristic function logic structure, sequentially and reversely modify each unit parameter and each module parameter in the valve flow characteristic function logic structure corresponding to the set of acquisition data.

[0122] In some optional embodiments, the valve flow characteristic test calculation device in the embodiment of the present disclosure further comprises:

[0123] In some alternative embodiments, the computing device of the valve flow characteristic test in the embodiments of the present disclosure further comprises:

[0124] a normality determining module, configured to determine that each unit parameter and each module parameter in the valve flow characteristic function logical structure belongs to a normal state if the absolute value of the deviation is less than or equal to a preset value.

[0125] In some alternative embodiments, the first computing unit 82 calculates the initial equivalent actual flow of each group of collected data based on the unit rated main steam pressure, the unit rated regulating pressure, the current unit main steam pressure and the current unit regulating pressure, and performs the calculation through the following formula:

[0126]

[0127] wherein P1 is the initial equivalent actual flow of each group of collected data, PT is the unit rated main steam pressure, PM is the unit rated regulating pressure, PM1 is the current unit regulating pressure, and PT1 is the current unit main steam pressure. e e

[0128] In some alternative embodiments, the data unit 83 unitizes the target equivalent actual flow of each group of collected data based on the initial equivalent actual flow of each group of collected data, and performs the unitization through the following formula:

[0129] Q1 = 100 x P1 / P Max

[0130] wherein Q1 is the target equivalent actual flow of each group of collected data, P1 is the initial equivalent actual flow of each group of collected data, and P is the maximum equivalent flow of each group of collected data. Max

[0131] In some alternative embodiments, the second computing unit 84 calculates the absolute value of the deviation between the target equivalent actual flow of each group of collected data and the total valve position instruction parameter output by the total valve position instruction module, and calculates the absolute value of the deviation through the following formula:

[0132] Δ = |Q1-Z1|

[0133] wherein Δ is the absolute value of the deviation, Q1 is the target equivalent actual flow of each group of collected data, and Z1 is the total valve position instruction parameter output by the total valve position instruction module.

[0134] Further function descriptions of each module and unit are the same as those of the above-mentioned corresponding embodiments, and will not be described here again.

[0135] ​​​In this embodiment, the calculation device for the valve flow characteristic test is presented in the form of a functional unit. Here, a unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0136] This invention also provides a computer device having the above-described calculation apparatus for valve flow characteristic testing.

[0137] Please see Figure 9 , Figure 9 This is a schematic diagram of the structure of a computer device provided in an optional embodiment of the present invention, such as... Figure 9 As shown, the computer device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 9 Take a processor 10 as an example.

[0138] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0139] The memory 20 stores instructions executable by at least one processor 10 to cause the at least one processor 10 to perform the method shown in the above embodiments.

[0140] The memory 20 can include a program storage area and a data storage area. The program storage area can store an operating system, application programs required for at least one function, etc. The data storage area can store data created by the computer device, etc. In addition, the memory 20 can include a high-speed random access memory, and can also include a non-transitory memory such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid state memory device. In some alternative embodiments, the memory 20 can optionally include memory that is remotely located with respect to the processor 10, and which can be connected to the computer device through a network. Examples of such networks include, but are not limited to, the Internet, an enterprise intranet, a local area network, a mobile communications network, and combinations thereof.

[0141] The memory 20 can include a volatile memory, such as a random access memory, and / or can include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid state memory device. The memory 20 can also include an array of multi-state flash memory cells, which can be used to store data and / or instructions in multiple states.

[0142] The computer device also includes a communications interface 30 for communicating with other devices or communication networks.

[0143] The embodiments of the present application also provide a computer readable storage medium. The above-mentioned method according to the embodiments of the present application can be implemented in hardware, firmware, or recorded in a storage medium, or implemented as computer code to be originally stored in a remote storage medium or a non-transitory machine readable storage medium downloaded through a network and stored in a local storage medium, so that the method described herein can be processed by such software on a storage medium using a general purpose computer, a special purpose processor, or programmable or special purpose hardware. The storage medium can be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk, or a solid state disk, etc. Further, the storage medium can also include a combination of the above-mentioned kinds of storage. It can be understood that the computer, processor, microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code, when the software or computer code is accessed and executed by the computer, processor, or hardware, the method shown in the above embodiments is implemented.

[0144] Part of the present application can be applied as a computer program product, for example, computer program instructions, when executed by a computer, through the operation of the computer, can invoke or provide the method and / or technical solutions according to the present application. Those skilled in the art should understand that the form of computer program instructions in computer readable medium includes but is not limited to source files, executable files, installation package files and the like, and accordingly, the way of computer program instructions executed by computer includes but is not limited to: the computer directly executes the instructions, or the computer compiles the instructions and then executes the corresponding compiled program, or the computer reads and executes the instructions, or the computer reads and installs the instructions and then executes the corresponding installed program. Here, the computer readable medium can be any available computer readable storage medium or communication medium accessible to the computer.

[0145] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A method of calculating a valve flow characteristic test, characterized by, The application is applied to a DEH valve flow function logic structure, the DEH valve flow function logic structure comprises at least one set of valve flow characteristic function logic modules and a total valve position instruction module, the valve flow characteristic function logic module comprises: a total valve position instruction module, a first coefficient unit, a second coefficient unit, a third coefficient unit, a fourth coefficient unit, a fifth coefficient unit, a first flow characteristic function unit, a second flow characteristic function unit, a third flow characteristic function unit, a fourth flow characteristic function unit, a fifth flow characteristic function unit, and a high-tuning valve instruction unit, wherein two adjacent flow characteristic function units are connected through a multiplier, each coefficient unit is connected with the corresponding multiplier, the total valve position instruction module is connected with the multiplier corresponding to the first coefficient unit, the high-tuning valve instruction unit is connected with the multiplier corresponding to the fifth coefficient unit, and the method comprises: Obtaining a plurality of sets of collected data, each set of collected data comprising: a unit rated main steam pressure, a unit rated regulating pressure, a unit current main steam pressure, and a unit current regulating pressure; Based on the unit rated main steam pressure, the unit rated regulating pressure, the unit current main steam pressure, and the unit current regulating pressure, calculating an initial equivalent actual flow of each set of collected data; Based on the initial equivalent actual flow of each set of collected data, normalizing a target equivalent actual flow of each set of collected data; Calculating an absolute deviation value between the target equivalent actual flow of each set of collected data and a total valve position instruction parameter output by the total valve position instruction module; Determining whether the absolute deviation value is greater than a preset value; If the absolute deviation value is greater than the preset value, corresponding unit parameters and module parameters in a valve flow characteristic function logic structure corresponding to the set of collected data are modified in a forward direction in sequence; In response to the forward modification of the unit parameters in the valve flow characteristic function logic structure, the unit parameters and module parameters in the valve flow characteristic function logic structure corresponding to the set of collected data are modified in a reverse direction in sequence.

2. The method of claim 1, wherein Further comprising: If the absolute deviation value is less than or equal to the preset value, it is determined that the unit parameters and module parameters in the valve flow characteristic function logic structure belong to a normal state.

3. The method of claim 1, wherein Based on the unit rated main steam pressure, the unit rated regulating pressure, the unit current main steam pressure, and the unit current regulating pressure, calculating an initial equivalent actual flow of each set of collected data is performed through the following formula: Wherein, P1 is the initial equivalent actual flow of each group of collected data, PT e is the rated main steam pressure of the unit, PM e is the rated regulating pressure of the unit, PM1 is the current regulating pressure of the unit, and PT1 is the current main steam pressure of the unit.

4. The method of claim 1, wherein Based on the initial equivalent actual flow of each set of collected data, normalizing a target equivalent actual flow of each set of collected data is performed through the following formula: Q1 = 100 x P1 / P Max Wherein Q1 is the target equivalent actual flow of each group of collected data, P1 is the initial equivalent actual flow of each group of collected data, P Max is the maximum equivalent flow of each group of collected data.

5. The method of claim 1, wherein Calculating an absolute deviation value between the target equivalent actual flow of each set of collected data and a total valve position instruction parameter output by the total valve position instruction module is calculated through the following formula: Δ=|Q1-Z1| Wherein Δ is the absolute deviation value, Q1 is the target equivalent actual flow of each set of collected data, and Z1 is the total valve position instruction parameter output by the total valve position instruction module.

6. A computing system for valve flow characteristic testing, characterized by, Comprising: A DEH valve flow function logic structure, a data collection module, a data processing module, a data storage module, and a data output module; The DEH valve flow function logic structure includes at least one set of valve flow characteristic function logic module and total valve position instruction module, the valve flow characteristic function logic module includes: first coefficient unit, second coefficient unit, third coefficient unit, fourth coefficient unit, fifth coefficient unit, first flow characteristic function unit, second flow characteristic function unit, third flow characteristic function unit, fourth flow characteristic function unit, fifth flow characteristic function unit, high pitch valve instruction unit, wherein two adjacent flow characteristic function units are connected through a multiplier, each coefficient unit is connected with the corresponding multiplier, the total valve position instruction module is connected with the multiplier corresponding to the first coefficient unit, and the high pitch valve instruction unit is connected with the multiplier corresponding to the fifth coefficient unit; The data acquisition module is used for acquiring each unit parameter and each module parameter in the valve flow characteristic function logic structure input by the user manually, and unit rated main steam pressure and unit rated regulation pressure; and is used for acquiring total valve position instruction, unit current main steam pressure, unit current regulation pressure, multiple high pitch valve instructions, unit current load, furnace negative pressure, main steam temperature, feed water flow, steam drum water level and steam turbine vibration according to sampling time automatically; The data storage module is used for storing various data acquired manually and automatically by the data acquisition module; The data processing module is used for executing the calculation method of the valve flow characteristic test in any one of claims 1 to 5; The data output module is used for outputting the modification result obtained by executing the calculation method of the valve flow characteristic test in any one of claims 1 to 5.

7. A computing device for valve flow characteristic testing, characterized by, The DEH valve flow function logic structure includes at least one set of valve flow characteristic function logic module and total valve position instruction module, the valve flow characteristic function logic module includes: first coefficient unit, second coefficient unit, third coefficient unit, fourth coefficient unit, fifth coefficient unit, first flow characteristic function unit, second flow characteristic function unit, third flow characteristic function unit, fourth flow characteristic function unit, fifth flow characteristic function unit, high pitch valve instruction unit, wherein two adjacent flow characteristic function units are connected through a multiplier, each coefficient unit is connected with the corresponding multiplier, the total valve position instruction module is connected with the multiplier corresponding to the first coefficient unit, and the high pitch valve instruction unit is connected with the multiplier corresponding to the fifth coefficient unit, the device includes: The data acquisition unit is used for acquiring multiple sets of acquisition data, and each set of acquisition data includes: unit rated main steam pressure, unit rated regulation pressure, unit current main steam pressure and unit current regulation pressure; The first calculation unit is used for calculating initial equivalent actual flow of each set of acquisition data based on the unit rated main steam pressure, the unit rated regulation pressure, the unit current main steam pressure and the unit current regulation pressure; The data unit is used for normalizing target equivalent actual flow of each set of acquisition data based on the initial equivalent actual flow of each set of acquisition data. The second calculation unit is configured to calculate an absolute deviation between the target equivalent actual flow of each set of collected data and the total valve position instruction parameter output by the total valve position instruction module; The data judgment unit is configured to judge whether the absolute deviation is greater than a preset value; The forward modification unit is configured to, if the absolute deviation is greater than the preset value, sequentially modify each unit parameter and each module parameter in the valve flow characteristic function logic structure corresponding to the set of collected data in a forward direction; The reverse modification unit is configured to, in response to the forward modification of each unit parameter in the valve flow characteristic function logic structure, sequentially modify each unit parameter and each module parameter in the valve flow characteristic function logic structure corresponding to the set of collected data in a reverse direction.

8. A computer device, comprising: The computer readable storage medium stores computer instructions, and the computer instructions are used to make the computer execute the valve flow characteristic test calculation method in any one of claims 1 to 5. The computer readable storage medium stores computer instructions, and the computer instructions are used to make the computer execute the valve flow characteristic test calculation method in any one of claims 1 to 5.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions, and the computer instructions are used to make the computer execute the valve flow characteristic test calculation method in any one of claims 1 to 5.

10. A computer program product, characterised in that, ​

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