High-pressure valve online test method and device, storage medium, steam turbine unit

Abstract

The present invention discloses a high-pressure valve online test method and device, a storage medium, and a steam turbine unit, which relate to the technical field of steam turbine online testing, and the main purpose is to solve the problem of abnormal unit oscillation during the high-pressure valve online test of the steam turbine unit. It mainly includes responding to the high-pressure valve online test start instruction, obtaining a single pressure valve compensation strategy or a multi-pressure valve linkage compensation strategy and a test adjustment rate of at least one target test pressure valve; determining at least one compensation adjustment pressure valve according to the compensation adjustment strategy, controlling the target test pressure valve to perform a first opening adjustment according to the test adjustment rate, and controlling the compensation adjustment pressure valve to perform a second opening adjustment, and the adjustment directions of the first opening adjustment and the second opening adjustment are opposite; obtaining the measured opening value of the target test pressure valve opening adjustment process, and determining the test result of the target test pressure valve according to the measured opening value and the test adjustment rate. It is mainly used for the online test of the high-pressure valve of the steam turbine.

Description

Technical Field

[0001] The invention relates to the technical field of online testing of steam turbines, and in particular to an online testing method and device for a high-pressure regulating valve, a storage medium, and a steam turbine unit. Background Art

[0002] Steam turbine, also known as steam turbine, is a rotary power machine that converts steam energy into mechanical work. It is mainly used as a prime mover for power generation and is the most widely used prime mover in modern thermal power plants. Steam turbines have the advantages of large single-unit power, high efficiency, and long life. The regulating valve is a mechanism for adjusting the steam intake in the steam turbine, including a high regulating valve for controlling the steam intake of the high-pressure cylinder and a medium regulating valve for controlling the steam intake of the medium-pressure cylinder. During the operation of the steam turbine, in order to ensure that each regulating valve can receive control instructions and close and open normally according to the control instructions, it is necessary to conduct online tests on the regulating valve regularly to ensure the safe operation of the steam turbine.

[0003] The existing online test method for regulating valves mainly closes the regulating valves that need to be tested one by one. During the closing test of one regulating valve, the other regulating valves adaptively adjust the valve opening. This method will cause large fluctuations in unit load and pressure during the online test of high regulating valves, and may even cause the unit to trip. Summary of the invention

[0004] In view of this, the present invention provides a high-pressure valve online test method and device, a storage medium, and a steam turbine unit, the main purpose of which is to solve the problem of abnormal unit oscillation during the high-pressure valve online test of the existing steam turbine unit.

[0005] According to one aspect of the present invention, there is provided a method for online testing of a high-pressure regulating valve of a steam turbine unit, comprising:

[0006] In response to a high-tone gate online test start instruction, a compensation adjustment strategy and a test adjustment rate of at least one target test gate are acquired, wherein the compensation adjustment strategy includes a single-tone gate compensation strategy or a multi-tone gate linkage compensation strategy;

[0007] Determine at least one compensation adjustment valve according to the compensation adjustment strategy, control the target test valve to perform a first opening adjustment according to the test adjustment rate, and control the compensation adjustment valve to perform a second opening adjustment, wherein the first opening adjustment and the second opening adjustment have opposite adjustment directions;

[0008] The measured opening value of the target test throttle opening adjustment process is obtained, and the test result of the target test throttle is determined according to the measured opening value and the test adjustment rate.

[0009] Further, the compensation adjustment strategy includes a multi-valve linkage compensation strategy, and determining at least one compensation adjustment valve according to the compensation adjustment strategy, controlling the target test valve to perform a first opening adjustment according to the test adjustment rate, and controlling the compensation adjustment valve to perform a second opening adjustment, comprises:

[0010] Determine a compensating adjustment tone from the remaining high tones other than the target test tone;

[0011] Controlling any of the target test throttles to perform negative opening adjustment according to the test adjustment rate, and controlling the compensation adjustment throttle to perform positive opening adjustment according to a rate corresponding to the test adjustment rate, so as to control the target test throttle opening to decrease and the compensation adjustment throttle opening to increase, until the target test throttle is closed;

[0012] If the test of the target test valve is completed, the compensation adjustment valve is controlled to perform reverse opening adjustment according to the rate corresponding to the test adjustment rate, and the target test valve is controlled to perform forward opening adjustment according to the test adjustment rate, so that the state of each valve is restored to the state before the test;

[0013] If the test of any of the target test throttles is not completed, the target test throttle in the closed state is determined as the compensation adjustment throttle, and the process returns to the step of controlling any of the target test throttles to perform negative adjustment of the opening according to the test adjustment rate.

[0014] Further, the compensation adjustment strategy includes a monotonic gate compensation strategy, and determining at least one compensation adjustment gate according to the compensation adjustment strategy, controlling the target test gate to perform a first opening adjustment according to the test adjustment rate, and controlling the compensation adjustment gate to perform a second opening adjustment, comprises:

[0015] Determine a compensating adjustment tone from the remaining high tones other than the target test tone;

[0016] Controlling any of the target test throttles to perform negative opening adjustment according to the test adjustment rate, and controlling the compensation adjustment throttle to perform positive opening adjustment according to a rate corresponding to the test adjustment rate, so as to control the target test throttle opening to decrease and the compensation adjustment throttle opening to increase, until the target test throttle is closed;

[0017] Controlling any of the target test adjustment valves to perform positive opening adjustment according to the test adjustment rate, and controlling the compensation adjustment valve to perform negative opening adjustment according to a rate corresponding to the test adjustment rate;

[0018] If the test of any of the target test throttles is not completed, the process returns to the step of controlling any of the target test throttles to perform negative adjustment of the opening according to the test adjustment rate.

[0019] Furthermore, the method further comprises:

[0020] During the test, the measured opening value of the target test throttle is obtained;

[0021] When the measured opening value is less than 10%, the compensation adjustment valve is controlled to stop performing the opening adjustment action.

[0022] Further, the step of determining the compensating adjustment tone from the remaining high tone other than the target test tone includes:

[0023] Obtaining the sequence identifiers and initial opening values ​​of the remaining high-profile doors;

[0024] Determine the valve whose initial opening value is less than the first preset opening threshold as a candidate valve;

[0025] According to the sequence identifier, the candidate tone with the smallest distance from the target test tone is determined from the candidate tone as the compensation adjustment tone.

[0026] Furthermore, before obtaining the compensation adjustment strategy, the method further includes:

[0027] In response to a high-pressure valve online test start instruction, the opening value of each valve is obtained;

[0028] If there are at least three valves whose opening values ​​are greater than the second preset opening threshold, then the compensation adjustment strategy is determined to be a multi-valve linkage compensation strategy;

[0029] If the number of the tuning valves whose opening values ​​are greater than the preset opening threshold is less than or equal to 2, it is determined that the compensation adjustment strategy is a single tuning valve compensation strategy.

[0030] Furthermore, before obtaining the compensation adjustment strategy, the method further includes:

[0031] In response to the high-tone gate online test start instruction, a compensation adjustment strategy confirmation request is sent to the control terminal, wherein the compensation adjustment strategy confirmation request is used to indicate the selection of a single-tone gate compensation strategy or a multi-tone gate linkage compensation strategy;

[0032] A reply instruction of the compensation adjustment strategy confirmation request is received, and the compensation adjustment strategy is determined according to a parsing result of the reply instruction.

[0033] According to another aspect of the present invention, there is provided an online test device for a high-pressure regulating valve of a steam turbine unit, comprising:

[0034] An acquisition module, configured to acquire a compensation adjustment strategy and a test adjustment rate of at least one target test gate in response to a high-tone gate online test start instruction, wherein the compensation adjustment strategy includes a single-gate compensation strategy or a multi-gate linkage compensation strategy;

[0035] a control module, configured to determine at least one compensation adjustment valve according to a compensation adjustment strategy, control the target test adjustment valve to perform a first opening adjustment according to the test adjustment rate, and control the compensation adjustment valve to perform a second opening adjustment, wherein the first opening adjustment and the second opening adjustment have opposite adjustment directions;

[0036] The determination module is used to obtain the measured opening value of the target test throttle opening adjustment process, and determine the test result of the target test throttle according to the measured opening value and the test adjustment rate.

[0037] Furthermore, the control module comprises:

[0038] A first determining unit is used to determine a compensating adjustment tone from the remaining high pitches other than the target test tone;

[0039] A first control unit is used to control any of the target test throttles to perform negative opening adjustment according to the test adjustment rate, and to control the compensation adjustment throttle to perform positive opening adjustment according to a rate corresponding to the test adjustment rate, so as to control the target test throttle opening to be reduced and the compensation adjustment throttle opening to be increased, until the target test throttle is closed;

[0040] A second control unit is used to control the compensation adjustment valve to perform reverse adjustment of the opening according to a rate corresponding to the test adjustment rate, and to control the target test adjustment valve to perform forward adjustment of the opening according to the test adjustment rate, if the test of the target test adjustment valve is completed, so that the state of each adjustment valve is restored to the state before the test;

[0041] The third control unit is used to determine the target test valve in the closed state as the compensation adjustment valve if the test of any of the target test valves is not completed, and return to the step of controlling any of the target test valves to perform negative adjustment of the opening according to the test adjustment rate.

[0042] Furthermore, the control module further includes:

[0043] A second determining unit is used to determine a compensating adjustment tone from the remaining high pitches other than the target test tone;

[0044] a fourth control unit, configured to control any of the target test valves to perform negative opening adjustment according to the test adjustment rate, and to control the compensation adjustment valve to perform positive opening adjustment according to a rate corresponding to the test adjustment rate, so as to control the target test valve to be opened smaller and the compensation adjustment valve to be opened larger, until the target test valve is closed;

[0045] a fifth control unit, configured to control any of the target test adjustment valves to perform positive adjustment of the opening according to the test adjustment rate, and to control the compensation adjustment valve to perform negative adjustment of the opening according to a rate corresponding to the test adjustment rate;

[0046] A sixth control unit is used to return to the step of controlling any of the target test throttles to perform negative adjustment of the opening according to the test adjustment rate if the test of any of the target test throttles is not completed.

[0047] Furthermore, the device also includes:

[0048] The acquisition module is also used to acquire the measured opening value of the target test throttle during the test;

[0049] The control module is further used to control the compensation regulating valve to stop performing the opening regulating action when the measured opening value is less than 10%.

[0050] Further, in a specific application scenario, the determination unit is specifically used to obtain the sequence identifiers and initial opening values ​​of the remaining high-profile doors;

[0051] Determine the valve whose initial opening value is less than the first preset opening threshold as a candidate valve;

[0052] According to the sequence identifier, the candidate tone with the smallest distance from the target test tone is determined from the candidate tone as the compensation adjustment tone.

[0053] Furthermore, the device also includes:

[0054] The acquisition module is further used to obtain the opening value of each tuning valve in response to the high-tuning valve online test start instruction;

[0055] The determination module is further configured to determine that the compensation adjustment strategy is a multi-valve linkage compensation strategy if there are at least three valve opening values ​​greater than a second preset opening threshold;

[0056] The determination module is further configured to determine that the compensation adjustment strategy is a single-valve compensation strategy if the number of valves whose opening values ​​are greater than a preset opening threshold is less than or equal to 2.

[0057] Furthermore, the device also includes:

[0058] A sending module, configured to send a compensation adjustment strategy confirmation request to the control terminal in response to a high-tuning gate online test start instruction, wherein the compensation adjustment strategy confirmation request is used to indicate the selection of a single-tuning gate compensation strategy or a multi-tuning gate linkage compensation strategy;

[0059] The determination module is further configured to receive a reply instruction to the compensation adjustment strategy confirmation request, and determine the compensation adjustment strategy according to a parsing result of the reply instruction.

[0060] According to another aspect of the present invention, a storage medium is provided, wherein at least one executable instruction is stored in the storage medium, and the executable instruction enables a processor to execute operations corresponding to the above-mentioned high-pressure valve online test method of a steam turbine unit.

[0061] According to yet another aspect of the present invention, there is provided a steam turbine, wherein the steam turbine is used to perform operations corresponding to the high-pressure valve online test method of the steam turbine unit.

[0062] By means of the above technical solution, the technical solution provided by the embodiment of the present invention has at least the following advantages:

[0063] The present invention provides a method and device for online testing of a high-pressure regulating valve, a storage medium, and a steam turbine unit. The embodiment of the present invention obtains a compensation adjustment strategy and a test adjustment rate of at least one target test regulating valve in response to a high-pressure regulating valve online test start instruction, wherein the compensation adjustment strategy includes a single-pressure regulating valve compensation strategy or a multi-pressure regulating valve linkage compensation strategy; at least one compensation adjustment regulating valve is determined according to the compensation adjustment strategy, and the target test regulating valve is controlled to perform a first opening adjustment according to the test adjustment rate, and the compensation adjustment regulating valve is controlled to perform a second opening adjustment, wherein the adjustment directions of the first opening adjustment and the second opening adjustment are opposite; the measured opening value of the target test regulating valve opening adjustment process is obtained, and the test result of the target test regulating valve is determined according to the measured opening value and the test adjustment rate, thereby greatly reducing the pressure and load fluctuations of the steam turbine unit due to the closing of the test regulating valve during the online test, reducing the possibility of equipment abnormality, and at the same time ensuring the accuracy of the test, thereby greatly improving the safety of the online test of the regulating valve and the stability of the equipment.

[0064] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0066] Figure 1 A flow chart of an online test method for a high-pressure regulating valve of a steam turbine unit provided by an embodiment of the present invention is shown;

[0067] Figure 2 A schematic diagram of a control curve provided by an embodiment of the present invention is shown;

[0068] Figure 3 Another control curve schematic diagram provided by an embodiment of the present invention is shown;

[0069] Figure 4 A block diagram of the composition of an online test device for a high-pressure regulating valve of a steam turbine unit provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0070] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0071] The embodiment of the present invention provides a method for online testing of a high-pressure regulating valve of a steam turbine unit, such as Figure 1 As shown, the method includes:

[0072] 101. In response to a high-throttle online test start instruction, obtain a compensation adjustment strategy and a test adjustment rate of at least one target test throttle.

[0073] In the embodiment of the present invention, the target test throttle is the high-throttle valve that needs to be tested in the current high-throttle valve online test, which may be one or more. In the process of conducting the high-throttle valve online test, it is necessary to adjust the throttle opening of the target test throttle valve from the current state to zero (throttle valve closed) according to a certain opening adjustment rate to determine that the target test throttle valve has the ability to close, thereby achieving the test purpose. Among them, the test adjustment rate can be set by the test control personnel according to the equipment specifications and actual operating load of the steam turbine unit. The same test adjustment rate can be applied to all target test throttle valves, or different target test throttle valves can use different test adjustment rates. The specific value of the test adjustment rate can be 0.05%, 0.06%, etc., which is not specifically limited in the embodiment of the present invention. The test adjustment rate can be a default value preset in the controller, or it can be a value input or selected by the operator through the human-computer interaction device according to the specific situation of the current test. The compensation adjustment strategy is used to compensate for the pressure fluctuation caused by the closing of the target test throttle valve during the closing process of the target test throttle valve, specifically including a single throttle valve compensation strategy or a multi-throttle valve linkage compensation strategy.

[0074] 102. Determine at least one compensation adjustment valve according to the compensation adjustment strategy, control the target test valve to perform a first opening adjustment according to the test adjustment rate, and control the compensation adjustment valve to perform a second opening adjustment.

[0075] In the embodiment of the present invention, the adjustment directions of the first opening adjustment and the second opening adjustment are opposite, that is, the compensating adjustment valve is a high-adjusting valve in the opposite direction of the opening adjustment of the target test valve. When the opening of the target test valve is gradually reduced, the opening of the compensating adjustment valve is gradually increased, and the test adjustment rates of the two can be the same or different. Since the target test valve and the compensating adjustment valve are high-adjusting valves at different positions in the steam turbine unit, the opening adjustment of the high-adjusting valves at different positions has different speeds of affecting the air pressure in the steam turbine. If there are many high-adjusting valves in the steam turbine, and the sequence difference between the compensating adjustment valve and the target test valve is large (the distance is far), there will be differences in the speed of the opening changes of the two on the pressure fluctuations in the steam turbine unit. When the impact rate is different, the compensating adjustment valve and the target test valve can be controlled separately by different test adjustment rates, so that the opening adjustment of the compensating adjustment valve can timely compensate for the air pressure impact caused by the adjustment of the target test valve. If the opening changes of the target test throttle and the compensating regulating throttle have the same rate of influence on the pressure fluctuation in the steam turbine unit, both can be controlled according to the same test regulating rate.

[0076] It should be noted that during the test, the compensation adjustment gate is not limited to one. When the compensation adjustment strategy is a single-gate compensation strategy, the compensation adjustment gate is a fixed high gate, that is, this gate is used as the compensation adjustment gate for all target test gates to be tested. After the test of a target test gate is completed, the compensation adjustment gate and the target test gate are restored to the pre-test state at the same time, and then the online test of the next target test gate is started. When the compensation adjustment strategy is a multi-gate linkage compensation strategy, the target test gate after the test is completed (the gate is closed) can also be used as the compensation adjustment gate for the next target test gate that needs to be tested, and so on until the test of all target test gates is completed, and then the initial compensation adjustment gate and the last target test gate to be tested are restored to the pre-test state together. By determining the compensating regulating valve and the test regulating rate, the pressure fluctuation and load fluctuation generated during the test of the target test regulating valve can be compensated in a timely and stable manner, avoiding large fluctuations in the unit load and pressure, or even causing the unit to trip, and reducing the impact of the regulating valve online test on the operating stability of the turbine unit, thereby effectively improving the operating safety of the turbine unit while ensuring the normal progress of the online test.

[0077] 103. Obtain a measured opening value of the target test throttle opening adjustment process, and determine a test result of the target test throttle according to the measured opening value and the test adjustment rate.

[0078] In an embodiment of the present invention, during the process of adjusting the opening of the target test throttle, the measured opening value of the throttle is collected. The real-time expected opening of the target test throttle is calculated based on the test adjustment rate and the adjustment time, and the real-time expected opening is compared with the measured opening value. If the real-time expected opening matches the measured opening value, it indicates that the test result of the target test throttle is passed. If the real-time expected opening does not match the measured opening value, for example, the real-time expected opening is 20%, and the measured opening value represents the current opening of 40%, it indicates that the test result of the target test throttle is not passed. Among them, the measured opening value can be collected by a displacement or distance sensor installed near the throttle, and the embodiment of the present invention does not make specific limitations.

[0079] In one embodiment of the present invention, for further explanation and limitation, the step of determining at least one compensation adjustment valve according to the compensation adjustment strategy, controlling the target test valve to perform a first opening adjustment according to the test adjustment rate, and controlling the compensation adjustment valve to perform a second opening adjustment includes:

[0080] Determine a compensating adjustment tone from the remaining high tones other than the target test tone;

[0081] Controlling any of the target test throttles to perform negative opening adjustment according to the test adjustment rate, and controlling the compensation adjustment throttle to perform positive opening adjustment according to a rate corresponding to the test adjustment rate, so as to control the target test throttle opening to decrease and the compensation adjustment throttle opening to increase, until the target test throttle is closed;

[0082] If the test of the target test valve is completed, the compensation adjustment valve is controlled to perform reverse opening adjustment according to the rate corresponding to the test adjustment rate, and the target test valve is controlled to perform forward opening adjustment according to the test adjustment rate, so that the state of each valve is restored to the state before the test;

[0083] If the test of any of the target test throttles is not completed, the target test throttle in the closed state is determined as the compensation adjustment throttle, and the process returns to the step of controlling any of the target test throttles to perform negative adjustment of the opening according to the test adjustment rate.

[0084] In the embodiment of the present invention, the compensation adjustment strategy is a multi-valve linkage compensation strategy. That is, multiple target test valves are used as a mutual compensation adjustment method for adjusting the valves. Among them, the reverse adjustment of the opening is an adjustment method for reducing the opening, and the positive adjustment of the opening is an adjustment method for increasing the opening. Because during the normal operation of the steam turbine, not all high-pressure valves are in the open state, depending on the load, at least one high-pressure valve is in the closed state. Taking the Dongqi unit as an example, usually the CV1, CV2, and CV4 valves are open, and the CV3 valve is closed. Taking the test of all the high-pressure valves of the Dongqi unit as an example, Figure 2 The control curve shown in the figure illustrates the test process of the multi-valve linkage compensation strategy:

[0085] 1) Control CV1 to close at a test adjustment rate of 0.05%. At the same time, use the closed CV3 valve as a compensation adjustment valve and open it at a test adjustment rate of 0.05%;

[0086] 2) After CV1 is closed, since CV2 and CV4 have not completed the test, it is determined that the test is not completed, and CV1 is used as a compensation adjustment valve;

[0087] 3) Control CV2 to close at a test adjustment rate of 0.05%. At the same time, use the CV1 valve in the closed state as a compensation adjustment valve and open it at a test adjustment rate of 0.05%;

[0088] 4) After CV2 is closed, CV1 is closed, and since CV4 has not completed the test, it is determined that the test is not completed, and CV2 is used as a compensation adjustment valve;

[0089] 5) Control CV4 to close at a test adjustment rate of 0.05%. At the same time, use the closed CV2 valve as a compensation adjustment valve and open it at a test adjustment rate of 0.05%;

[0090] 6) After CV4 is closed, make sure that all valves have completed the test, control CV3 to close at a test adjustment rate of 0.05%, and at the same time, open CV4 in the closed state at a test adjustment rate of 0.05% to restore each valve to the state before the test.

[0091] By using the target test throttle that has completed the test as the compensation adjustment throttle for the next target test throttle, the process of opening the compensation adjustment throttle and then closing it again as the compensation adjustment throttle for the next target test throttle is avoided. In the process of online testing of multiple high-throttle throttles, this method can greatly reduce the number of throttle control times, shorten the test time, and thus improve the test efficiency.

[0092] In one embodiment of the present invention, for further explanation and limitation, determining at least one compensation adjustment valve according to the compensation adjustment strategy, controlling the target test valve to perform a first opening adjustment according to the test adjustment rate, and controlling the compensation adjustment valve to perform a second opening adjustment include:

[0093] Determine a compensating adjustment tone from the remaining high tones other than the target test tone;

[0094] Controlling any of the target test throttles to perform negative opening adjustment according to the test adjustment rate, and controlling the compensation adjustment throttle to perform positive opening adjustment according to a rate corresponding to the test adjustment rate, so as to control the target test throttle opening to decrease and the compensation adjustment throttle opening to increase, until the target test throttle is closed;

[0095] Controlling any of the target test adjustment valves to perform positive opening adjustment according to the test adjustment rate, and controlling the compensation adjustment valve to perform negative opening adjustment according to a rate corresponding to the test adjustment rate;

[0096] If the test of any of the target test throttles is not completed, the process returns to the step of controlling any of the target test throttles to perform negative adjustment of the opening according to the test adjustment rate.

[0097] In the embodiment of the present invention, the compensation adjustment strategy is a monotonic gate compensation strategy. Taking the online test of Dongqi units CV1 and CV2 as an example, Figure 3 The control curve shown illustrates the experimental process of the monotonic gate compensation strategy:

[0098] a) Control CV1 to close at a test adjustment rate of 0.05%. At the same time, use the closed CV3 valve as a compensation adjustment valve and open it at a test adjustment rate of 0.05%.

[0099] b) After CV1 is closed, CV3 is controlled to be closed at a test adjustment rate of 0.05%. At the same time, CV1 in the closed state is opened at a test adjustment rate of 0.05% to restore the CV2 valve to the state before the test.

[0100] c) After CV3 is closed, since CV2 has not completed the test, it is determined that the test is not completed, and the CV3 valve is continued to be used as the compensation adjustment valve;

[0101] d) Control CV2 to close at a test adjustment rate of 0.05%. At the same time, use the closed CV3 valve as a compensation adjustment valve and open it at a test adjustment rate of 0.05%.

[0102] e) After CV2 is closed, CV3 is controlled to be closed at a test adjustment rate of 0.05%. At the same time, CV2, which is in a closed state, is opened at a test adjustment rate of 0.05% to restore the CV2 valve to the state before the test.

[0103] By using CV3 as the compensation regulating valve, the non-operating regulating valve is effectively used to compensate for the steam inlet volume of other operating regulating valves for online tests, reducing the series of effects on the steam turbine caused by the large reduction in steam inlet volume caused by closing the regulating valve during online tests. Using one regulating valve as the compensation regulating valve can meet the actual needs of the on-site equipment, thereby improving the flexibility of compensation control.

[0104] In an embodiment of the present invention, for further explanation and limitation, the method further includes:

[0105] During the test, the measured opening value of the target test throttle is obtained;

[0106] When the measured opening value is less than 10%, the compensation adjustment valve is controlled to stop performing the opening adjustment action.

[0107] In the embodiment of the present invention, when the opening of the high regulating valve is less than 10%, the subsequent opening adjustment has very little effect on the steam turbine unit. At this time, the control of the compensating regulating valve can be stopped to keep it at the current opening value unchanged. During the recovery process of the target test regulating valve, when the measured opening value is equal to or greater than 10%, the compensating regulating valve is controlled to adjust the regulating valve opening value in the opposite adjustment direction.

[0108] In one embodiment of the present invention, for further explanation and limitation, the step of determining the compensating adjustment tone from the remaining high tone other than the target test tone includes:

[0109] Obtaining the sequence identifiers and initial opening values ​​of the remaining high-profile doors;

[0110] Determine the valve whose initial opening value is less than the first preset opening threshold as a candidate valve;

[0111] According to the sequence identifier, the candidate tone with the smallest distance from the target test tone is determined from the candidate tone as the compensation adjustment tone.

[0112] In an embodiment of the present invention, when the turbine load is small, there may be more than one regulating valve in a closed state, that is, the initial opening value is less than the first preset opening threshold value. At this time, all the regulating valves whose initial opening values ​​are less than the first preset opening threshold value can be used as candidate regulating valves. The distance between the regulating valves is then determined based on the sequence identification of the regulating valves, so that the candidate regulating valve closest to the target test regulating valve is used as the compensation regulating valve. Among them, the sequence identification is the distribution order of the regulating valves in the turbine (with the flow direction of steam as the positive direction), for example, 101, 102, 103. Among them, the first preset opening threshold value can be 0, or it can be other opening values ​​less than 10%, and the embodiment of the present invention does not make specific limitations.

[0113] Since the closer the distance between the regulating valves is, the more consistent the impact of their opening and closing processes on the steam turbine is, selecting the candidate regulating valve with the smallest distance from the target test regulating valve as the compensating regulating valve can improve the timeliness and accuracy of compensation and reduce the occurrence of pressure fluctuations.

[0114] In an embodiment of the present invention, for further explanation and limitation, before obtaining the compensation adjustment strategy, the method further includes:

[0115] In response to a high-pressure valve online test start instruction, the opening value of each valve is obtained;

[0116] If there are at least three valves whose opening values ​​are greater than the second preset opening threshold, then the compensation adjustment strategy is determined to be a multi-valve linkage compensation strategy;

[0117] If the number of the tuning valves whose opening values ​​are greater than the preset opening threshold is less than or equal to 2, it is determined that the compensation adjustment strategy is a single tuning valve compensation strategy.

[0118] In an embodiment of the present invention, the second preset opening threshold is used to determine whether the current throttle valve is in operation. The opening of the existing throttle valve in operation is generally 60%, and the second preset opening threshold can be 55%, 50%, etc. The high-throttle valve test requires a closing test on all the throttle valves in operation, and the number of throttle valves in operation is counted, that is, the number of target test throttle valves that need to be tested is counted. When the number of throttle valves in operation is small, a single throttle valve compensation strategy is more suitable; when the number of throttle valves in operation is large, a multi-throttle valve linkage compensation strategy is more suitable. By monitoring the opening value of the high-throttle valve, the compensation adjustment strategy is automatically selected according to the number of test throttle valves required, thereby realizing the automatic selection of the compensation adjustment strategy, improving the intelligence of the online test, and improving the user experience.

[0119] In an embodiment of the present invention, for further explanation and limitation, before obtaining the compensation adjustment strategy, the method further includes:

[0120] In response to the high-pressure gate online test start instruction, sending a compensation adjustment strategy confirmation request to the control terminal;

[0121] A reply instruction of the compensation adjustment strategy confirmation request is received, and the compensation adjustment strategy is determined according to a parsing result of the reply instruction.

[0122] In an embodiment of the present invention, as another way to determine the compensation strategy, in response to the high-tuning gate online test start instruction, a compensation adjustment strategy confirmation request is sent to the control terminal. The compensation adjustment strategy confirmation request is used to indicate the selection of a single-tuning gate compensation strategy or a multi-tuning gate linkage compensation strategy. Through a visual interface, the operator selects the compensation adjustment strategy, thereby improving the flexibility of online test strategy selection.

[0123] The present invention provides an online test method for a high-pressure regulating valve of a steam turbine unit. In an embodiment of the present invention, a compensation adjustment strategy and a test adjustment rate of at least one target test regulating valve are obtained in response to an online test start instruction of the high-pressure regulating valve, wherein the compensation adjustment strategy includes a single-pressure regulating valve compensation strategy or a multi-pressure regulating valve linkage compensation strategy; at least one compensation adjustment regulating valve is determined according to the compensation adjustment strategy, and the target test regulating valve is controlled to perform a first opening adjustment according to the test adjustment rate, and the compensation adjustment regulating valve is controlled to perform a second opening adjustment, wherein the adjustment directions of the first opening adjustment and the second opening adjustment are opposite; the measured opening value of the target test regulating valve opening adjustment process is obtained, and the test result of the target test regulating valve is determined according to the measured opening value and the test adjustment rate, thereby greatly reducing the pressure and load fluctuations of the steam turbine unit due to the closing of the test regulating valve during the online test, reducing the possibility of equipment abnormality, and at the same time ensuring the accuracy of the test, thereby greatly improving the safety of the online test of the regulating valve and the stability of the equipment.

[0124] Furthermore, as a response to the above Figure 1 The embodiment of the present invention provides an online test device for high-pressure valve of a steam turbine unit, such as Figure 4 As shown, the device comprises:

[0125] An acquisition module 31 is used to acquire a compensation adjustment strategy and a test adjustment rate of at least one target test valve in response to a high-valve online test start instruction, wherein the compensation adjustment strategy includes a single-valve compensation strategy or a multi-valve linkage compensation strategy;

[0126] A control module 32, configured to determine at least one compensation adjustment valve according to a compensation adjustment strategy, control the target test valve to perform a first opening adjustment according to the test adjustment rate, and control the compensation adjustment valve to perform a second opening adjustment, wherein the first opening adjustment and the second opening adjustment have opposite adjustment directions;

[0127] The determination module 33 is used to obtain the measured opening value of the target test throttle opening adjustment process, and determine the test result of the target test throttle according to the measured opening value and the test adjustment rate.

[0128] Furthermore, the control module 32 includes:

[0129] A first determining unit is used to determine a compensating adjustment tone from the remaining high pitches other than the target test tone;

[0130] A first control unit is used to control any of the target test throttles to perform negative opening adjustment according to the test adjustment rate, and to control the compensation adjustment throttle to perform positive opening adjustment according to a rate corresponding to the test adjustment rate, so as to control the target test throttle opening to be reduced and the compensation adjustment throttle opening to be increased, until the target test throttle is closed;

[0131] A second control unit is used to control the compensation adjustment valve to perform reverse adjustment of the opening according to a rate corresponding to the test adjustment rate, and to control the target test adjustment valve to perform forward adjustment of the opening according to the test adjustment rate, if the test of the target test adjustment valve is completed, so that the state of each adjustment valve is restored to the state before the test;

[0132] The third control unit is used to determine the target test valve in the closed state as the compensation adjustment valve if the test of any of the target test valves is not completed, and return to the step of controlling any of the target test valves to perform negative adjustment of the opening according to the test adjustment rate.

[0133] Furthermore, the control module 32 further includes:

[0134] A second determining unit is used to determine a compensating adjustment tone from the remaining high pitches other than the target test tone;

[0135] a fourth control unit, configured to control any of the target test valves to perform negative opening adjustment according to the test adjustment rate, and to control the compensation adjustment valve to perform positive opening adjustment according to a rate corresponding to the test adjustment rate, so as to control the target test valve to be opened smaller and the compensation adjustment valve to be opened larger, until the target test valve is closed;

[0136] a fifth control unit, configured to control any of the target test adjustment valves to perform positive adjustment of the opening according to the test adjustment rate, and to control the compensation adjustment valve to perform negative adjustment of the opening according to a rate corresponding to the test adjustment rate;

[0137] A sixth control unit is used to return to the step of controlling any of the target test throttles to perform negative adjustment of the opening according to the test adjustment rate if the test of any of the target test throttles is not completed.

[0138] Furthermore, the device also includes:

[0139] The acquisition module 31 is also used to acquire the measured opening value of the target test throttle during the test;

[0140] The control module 32 is further configured to control the compensation regulating valve to stop performing the opening regulating action when the measured opening value is less than 10%.

[0141] Further, in a specific application scenario, the determination unit is specifically used to obtain the sequence identifiers and initial opening values ​​of the remaining high-profile doors;

[0142] Determine the valve whose initial opening value is less than the first preset opening threshold as a candidate valve;

[0143] According to the sequence identifier, the candidate tone with the smallest distance from the target test tone is determined from the candidate tone as the compensation adjustment tone.

[0144] Furthermore, the device also includes:

[0145] The acquisition module 31 is also used to respond to the high-pressure valve online test start instruction to obtain the opening value of each valve;

[0146] The determination module 33 is further configured to determine that the compensation adjustment strategy is a multi-valve linkage compensation strategy if there are at least three valve opening values ​​greater than a second preset opening threshold;

[0147] The determination module 33 is further configured to determine that the compensation adjustment strategy is a single-valve compensation strategy if the number of valves having an opening value greater than a preset opening threshold is less than or equal to 2.

[0148] Furthermore, the device also includes:

[0149] A sending module, configured to send a compensation adjustment strategy confirmation request to the control terminal in response to a high-tuning gate online test start instruction, wherein the compensation adjustment strategy confirmation request is used to indicate the selection of a single-tuning gate compensation strategy or a multi-tuning gate linkage compensation strategy;

[0150] The determination module 33 is further configured to receive a reply instruction to the compensation adjustment strategy confirmation request, and determine the compensation adjustment strategy according to a parsing result of the reply instruction.

[0151] The present invention provides an online test device for a high-pressure regulating valve of a steam turbine unit. In an embodiment of the present invention, a compensation adjustment strategy and a test adjustment rate of at least one target test regulating valve are obtained in response to an online test start instruction of the high-pressure regulating valve, wherein the compensation adjustment strategy includes a single-pressure regulating valve compensation strategy or a multi-pressure regulating valve linkage compensation strategy; at least one compensation adjustment regulating valve is determined according to the compensation adjustment strategy, and the target test regulating valve is controlled to perform a first opening adjustment according to the test adjustment rate, and the compensation adjustment regulating valve is controlled to perform a second opening adjustment, wherein the adjustment directions of the first opening adjustment and the second opening adjustment are opposite; the measured opening value of the target test regulating valve opening adjustment process is obtained, and the test result of the target test regulating valve is determined according to the measured opening value and the test adjustment rate, thereby greatly reducing the pressure and load fluctuations of the steam turbine unit due to the closing of the test regulating valve during the online test, reducing the possibility of equipment abnormality, and at the same time ensuring the accuracy of the test, thereby greatly improving the safety of the online test of the regulating valve and the stability of the equipment.

[0152] According to one embodiment of the present invention, a storage medium is provided, wherein the storage medium stores at least one executable instruction, and the computer executable instruction can execute the high-pressure valve online test method of the steam turbine unit in any of the above method embodiments.

[0153] According to one embodiment of the present invention, a steam turbine is provided, wherein the steam turbine is used to perform operations corresponding to the high-pressure valve online test method of the steam turbine unit.

[0154] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, and optionally, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0155] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for online testing of a high-pressure valve of a steam turbine unit, characterized in that: include: In response to a high-tune online test start instruction, obtaining a compensation adjustment strategy and a test adjustment rate of at least one target test tune; Determine at least one compensation adjustment valve according to the compensation adjustment strategy, control the target test valve to perform a first opening adjustment according to the test adjustment rate, and control the compensation adjustment valve to perform a second opening adjustment, wherein the first opening adjustment and the second opening adjustment have opposite adjustment directions; Obtaining a measured opening value of the target test throttle opening adjustment process, and determining a test result of the target test throttle according to the measured opening value and the test adjustment rate; The compensation adjustment strategy includes a multi-valve linkage compensation strategy, determining at least one compensation adjustment valve according to the compensation adjustment strategy, controlling the target test valve to perform a first opening adjustment according to the test adjustment rate, and controlling the compensation adjustment valve to perform a second opening adjustment, including: Determine a compensating adjustment tone from the remaining high tones other than the target test tone; Controlling any of the target test throttles to perform negative opening adjustment according to the test adjustment rate, and controlling the compensation adjustment throttle to perform positive opening adjustment according to a rate corresponding to the test adjustment rate, so as to control the target test throttle opening to decrease and the compensation adjustment throttle opening to increase, until the target test throttle is closed; If the test of the target test valve is completed, the compensation adjustment valve is controlled to perform reverse opening adjustment according to the rate corresponding to the test adjustment rate, and the target test valve is controlled to perform forward opening adjustment according to the test adjustment rate, so that the state of each valve is restored to the state before the test; If the test of any of the target test throttles is not completed, the target test throttle in the closed state is determined as the compensation adjustment throttle, and the process returns to the step of controlling any of the target test throttles to perform negative adjustment of the opening according to the test adjustment rate; The compensation adjustment strategy includes a monotonic door compensation strategy, determining at least one compensation adjustment door according to the compensation adjustment strategy, controlling the target test door to perform a first opening adjustment according to the test adjustment rate, and controlling the compensation adjustment door to perform a second opening adjustment, including: Determine a compensating adjustment tone from the remaining high tones other than the target test tone; Controlling any of the target test throttles to perform negative opening adjustment according to the test adjustment rate, and controlling the compensation adjustment throttle to perform positive opening adjustment according to a rate corresponding to the test adjustment rate, so as to control the target test throttle opening to decrease and the compensation adjustment throttle opening to increase, until the target test throttle is closed; Controlling any of the target test adjustment valves to perform positive opening adjustment according to the test adjustment rate, and controlling the compensation adjustment valve to perform negative opening adjustment according to a rate corresponding to the test adjustment rate; If the test of any of the target test throttles is not completed, the process returns to the step of controlling any of the target test throttles to perform negative adjustment of the opening according to the test adjustment rate.

2. The method according to claim 1, characterized in that The method further comprises: During the test, the measured opening value of the target test throttle is obtained; When the measured opening value is less than 10%, the compensation adjustment valve is controlled to stop performing the opening adjustment action.

3. The method according to claim 1, characterized in that The step of determining the compensating adjustment tone from the remaining high tone gates other than the target test tone gate comprises: Obtaining the sequence identifiers and initial opening values ​​of the remaining high-profile doors; Determine the valve whose initial opening value is less than the first preset opening threshold as a candidate valve; According to the sequence identifier, the candidate tone with the smallest distance from the target test tone is determined from the candidate tone as the compensation adjustment tone.

4. The method according to any one of claims 1 to 3, characterized in that Before obtaining the compensation adjustment strategy, the method further includes: In response to a high-pressure valve online test start instruction, the opening value of each valve is obtained; If there are at least three valves whose opening values ​​are greater than the second preset opening threshold, then the compensation adjustment strategy is determined to be a multi-valve linkage compensation strategy; If the number of the tuning valves whose opening values ​​are greater than the preset opening threshold is less than or equal to 2, it is determined that the compensation adjustment strategy is a single tuning valve compensation strategy.

5. The method according to claim 4, characterized in that Before obtaining the compensation adjustment strategy, the method further includes: In response to the high-tone gate online test start instruction, a compensation adjustment strategy confirmation request is sent to the control terminal, wherein the compensation adjustment strategy confirmation request is used to indicate the selection of a single-tone gate compensation strategy or a multi-tone gate linkage compensation strategy; A reply instruction of the compensation adjustment strategy confirmation request is received, and the compensation adjustment strategy is determined according to a parsing result of the reply instruction.

6. An online test device for high-pressure valve of a steam turbine unit, characterized in that: include: An acquisition module, configured to acquire a compensation adjustment strategy and a test adjustment rate of at least one target test gate in response to a high-tone gate online test start instruction, wherein the compensation adjustment strategy includes a single-gate compensation strategy or a multi-gate linkage compensation strategy; a control module, configured to determine at least one compensation adjustment valve according to a compensation adjustment strategy, control the target test adjustment valve to perform a first opening adjustment according to the test adjustment rate, and control the compensation adjustment valve to perform a second opening adjustment, wherein the first opening adjustment and the second opening adjustment have opposite adjustment directions; A determination module, used for obtaining the measured opening value of the target test throttle opening adjustment process, and determining the test result of the target test throttle according to the measured opening value and the test adjustment rate; The control module comprises: A first determining unit is used to determine a compensating adjustment tone from the remaining high pitches other than the target test tone; A first control unit is used to control any of the target test throttles to perform negative opening adjustment according to the test adjustment rate, and to control the compensation adjustment throttle to perform positive opening adjustment according to a rate corresponding to the test adjustment rate, so as to control the target test throttle opening to be reduced and the compensation adjustment throttle opening to be increased, until the target test throttle is closed; A second control unit is used to control the compensation adjustment valve to perform reverse adjustment of the opening according to a rate corresponding to the test adjustment rate, and to control the target test adjustment valve to perform forward adjustment of the opening according to the test adjustment rate, if the test of the target test adjustment valve is completed, so that the state of each adjustment valve is restored to the state before the test; a third control unit, for determining the target test valve in the closed state as the compensation adjustment valve if the test of any of the target test valves is not completed, and returning to the step of controlling any of the target test valves to perform negative adjustment of the opening according to the test adjustment rate; The control module further includes: A second determining unit is used to determine a compensating adjustment tone from the remaining high pitches other than the target test tone; a fourth control unit, configured to control any of the target test valves to perform negative opening adjustment according to the test adjustment rate, and to control the compensation adjustment valve to perform positive opening adjustment according to a rate corresponding to the test adjustment rate, so as to control the target test valve to be opened smaller and the compensation adjustment valve to be opened larger, until the target test valve is closed; a fifth control unit, configured to control any of the target test adjustment valves to perform positive adjustment of the opening according to the test adjustment rate, and to control the compensation adjustment valve to perform negative adjustment of the opening according to a rate corresponding to the test adjustment rate; A sixth control unit is used to return to the step of controlling any of the target test throttles to perform negative adjustment of the opening according to the test adjustment rate if the test of any of the target test throttles is not completed.

7. A storage medium storing at least one executable instruction, wherein the executable instruction enables a processor to execute operations corresponding to the method for online testing of a high-pressure regulating valve of a steam turbine unit according to any one of claims 1 to 5.

8. A steam turbine, the steam turbine being used to perform operations corresponding to the high-pressure valve online testing method for a steam turbine unit according to any one of claims 1 to 5.

Images