A method and system for fault regulation of a steam turbine unit

Abstract

The application discloses a steam turbine unit fault adjusting method and system, relates to the technical field of steam turbine unit fault adjusting, and responds to a received steam turbine fault adjusting request, acquires a gas turbine load of a steam turbine unit to be adjusted, and judges whether the gas turbine load is greater than a preset trip threshold value; when the gas turbine load is greater than the trip threshold value, a gas turbine load of the steam turbine unit to be adjusted is acquired, a steam turbine trip signal is generated, the steam turbine trip signal is input into a preset automatic control model, a target control model is obtained, a bypass adjusting valve associated with the steam turbine unit to be adjusted is subjected to an override opening operation, an override time of a bypass pressure reducing adjusting valve is acquired in real time, and the steam turbine unit to be adjusted is subjected to fault adjusting based on the override time, the target control model and the gas turbine load. The steam turbine unit fault adjusting method solves the technical problem that existing steam turbine unit fault adjusting methods mainly depend on manual adjustment, additional safety risks are prone to being caused, and the reliability of LNG unit operation is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam turbine unit fault regulation, and particularly relates to a steam turbine unit fault regulation method and system. BACKGROUND

[0002] With large-scale integration of renewable energy such as wind power and photovoltaic into the power grid, the volatility and intermittency of the power system are increasing. LNG units have developed rapidly in China due to their flexibility in rapid start-up and large-scale rapid load regulation. The steam turbine unit is an important equipment in the LNG unit. When the steam turbine unit trips, it will bring great impact and operation risk to the waste heat boiler and the steam turbine generator unit. Therefore, how to safely and quickly regulate the steam turbine unit when the steam turbine unit fails is crucial.

[0003] At present, the existing steam turbine unit fault regulation method mainly relies on manual regulation, which is time-consuming and laborious, and the control is unstable, which easily produces additional safety risks and reduces the reliability of LNG unit operation. SUMMARY

[0004] The present application provides a steam turbine unit fault regulation method and system, which solves the technical problem that the existing steam turbine unit fault regulation method mainly relies on manual regulation, which is time-consuming and laborious, and the control is unstable, which easily produces additional safety risks and reduces the reliability of LNG unit operation.

[0005] The present application provides a steam turbine unit fault regulation method and system, which solves the technical problem that the existing steam turbine unit fault regulation method mainly relies on manual regulation, which is time-consuming and laborious, and the control is unstable, which easily produces additional safety risks and reduces the reliability of LNG unit operation.

[0006] In response to the received steam turbine fault regulation request, the gas turbine load of the steam turbine unit to be regulated is obtained, and it is judged whether the gas turbine load is greater than a preset trip threshold;

[0007] When the gas turbine load is greater than the trip threshold, the gas turbine load of the steam turbine unit to be regulated is obtained, and a steam turbine trip signal is generated;

[0008] The steam turbine trip signal is input into a preset automatic control model to obtain a target control model;

[0009] The bypass regulation valve associated with the steam turbine unit to be regulated is operated in over-ride, and the over-ride time of the bypass pressure reduction regulation valve is obtained in real time;

[0010] Based on the over-ride time, the steam turbine unit to be regulated is regulated according to the target control model and the gas turbine load.

[0011] Optionally, the bypass regulating valve comprises a bypass pressure reducing regulating valve and a bypass temperature reducing regulating valve, and the step of performing the over-ride opening operation on the bypass regulating valve associated with the steam turbine unit to be regulated comprises:

[0012] issuing a preset over-ride pulse to the bypass pressure reducing regulating valve, so that the bypass pressure reducing regulating valve executes in response to the over-ride pulse and outputs a bypass pressure reducing valve opening degree feedforward signal after execution;

[0013] adjusting the opening degree of the bypass temperature reducing regulating valve by using the bypass pressure reducing valve opening degree feedforward signal.

[0014] Optionally, the step of performing fault regulation on the steam turbine unit to be regulated according to the target control model and the gas turbine load based on the over-ride time comprises:

[0015] performing fault regulation on the steam turbine unit to be regulated according to the target control model based on the over-ride time;

[0016] judging whether the gas turbine load is greater than a preset gas turbine regulation threshold value;

[0017] if the gas turbine load is greater than the gas turbine regulation threshold value, performing a load reduction operation on the gas turbine of the steam turbine unit to be regulated, and jumping to execute the step of obtaining the gas turbine load of the steam turbine unit to be regulated until the gas turbine load is less than or equal to the gas turbine regulation threshold value;

[0018] if the gas turbine load is less than or equal to the gas turbine regulation threshold value, maintaining the gas turbine in the running state at the current time for continuous running.

[0019] Optionally, the target control model comprises a bypass regulating model and a steam turbine thermal auxiliary shielding model, and the step of performing fault regulation on the steam turbine unit to be regulated according to the target control model based on the over-ride time comprises:

[0020] judging whether the over-ride time is greater than or equal to a preset over-ride threshold value;

[0021] if the over-ride time is greater than or equal to the over-ride threshold value, inputting the bypass working condition parameters of the steam turbine unit to be regulated into the bypass regulating model to obtain a bypass control instruction;

[0022] inputting the electrical quantity parameters of the steam turbine unit to be regulated into the steam turbine thermal auxiliary shielding model to obtain a shielding instruction;

[0023] performing fault regulation and control on the steam turbine unit to be regulated by using the bypass control instruction and the shielding instruction;

[0024] If the override time is less than the override threshold, then jump to perform the step of acquiring the override time of the bypass pressure reducing valve in real time until the override time is greater than or equal to the override threshold.

[0025] Optionally, the bypass working condition parameters include a steam turbine load, a steam turbine bypass pressure, and a bypass steam temperature, the bypass regulation model includes an optimization control module, a bypass pressure reducing regulation model, and a bypass temperature reducing regulation model, the step of inputting the bypass working condition parameters of the steam turbine unit to be regulated into the bypass regulation model to obtain a bypass control instruction includes:

[0026] performing a pressure reducing control operation on the steam turbine load, the steam turbine bypass pressure, and a preset bypass pressure offset value through the bypass pressure reducing regulation model to obtain a steam turbine bypass pressure reducing valve opening degree instruction;

[0027] performing optimization control on the steam turbine bypass pressure reducing valve opening degree instruction through the optimization control module to obtain a first optimization instruction;

[0028] performing a temperature reducing control operation on the first optimization instruction, the bypass steam temperature, and a preset bypass temperature set value through the bypass temperature reducing regulation model to obtain a steam turbine bypass temperature reducing valve opening degree instruction;

[0029] adopting the steam turbine bypass pressure reducing valve opening degree instruction and the steam turbine bypass temperature reducing valve opening degree instruction as the bypass control instruction.

[0030] Optionally, the system further includes:

[0031] when the gas turbine load is greater than the trip threshold, determining whether the steam turbine unit to be regulated supplies heat to the outside;

[0032] when the steam turbine unit to be regulated supplies heat to the outside, disconnecting a steam turbine heat supply loop of the steam turbine unit to be regulated and closing a waste heat boiler heat supply loop of the steam turbine unit to be regulated.

[0033] The second aspect of the present application provides a steam turbine unit fault regulation system, which includes:

[0034] a monitoring module configured to acquire a gas turbine load of a steam turbine unit to be regulated in response to a received steam turbine fault regulation request and determine whether the gas turbine load is greater than a preset trip threshold;

[0035] a first analysis module configured to acquire the gas turbine load of the steam turbine unit to be regulated and generate a steam turbine trip signal when the gas turbine load is greater than the trip threshold;

[0036] a second analysis module configured to input the steam turbine trip signal into a preset automatic control model to obtain a target control model;

[0037] an over-ride module configured to over-ride the bypass regulation valve associated with the steam turbine unit to be regulated and obtain an over-ride time of the bypass regulation valve in real time;

[0038] a regulation module configured to regulate the steam turbine unit to be regulated based on the over-ride time, the target control model and the gas turbine load.

[0039] The third aspect of the present application provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the computer program is executed by the processor to make the processor execute the steps of the steam turbine unit regulation method according to any one of the preceding aspects.

[0040] The fourth aspect of the present application provides a computer readable storage medium, which stores a computer program, and the computer program is executed to implement the steam turbine unit regulation method according to any one of the preceding aspects.

[0041] The fifth aspect of the present application provides a computer program product, which comprises a computer program stored on a non-transitory computer readable storage medium, and the computer program comprises program instructions, wherein when the program instructions are executed by a computer, the computer executes the steam turbine unit regulation method according to any one of the preceding aspects.

[0042] From the above technical solutions, the present application has the following advantages:

[0043] By obtaining the gas turbine load of the steam turbine unit to be regulated, the steam turbine unit to be regulated is regulated according to the gas turbine load and the preset automatic control model, which overcomes the technical problem that the existing steam turbine unit regulation method mainly relies on manual regulation, which is time-consuming and laborious, and the control is unstable, which easily produces additional safety risks and reduces the reliability of LNG unit operation. Compared with the traditional fault regulation method, the present application realizes the rapid reduction of the gas turbine load of the steam turbine unit to be regulated to the trip threshold value through the gas turbine load and the preset automatic control model, and releases the boiler steam to stabilize the steam pressure through the bypass regulation valve associated with the steam turbine unit to be regulated, which avoids the complexity and instability of manual regulation and improves the reliability of LNG unit operation. BRIEF DESCRIPTION OF DRAWINGS

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

[0045] Figure 1 A step flow chart of a steam turbine unit fault regulation method provided for the first embodiment of the present application is shown in FIG. 1.

[0046] Figure 2 A step flow chart of a steam turbine unit fault regulation method provided for the second embodiment of the present application is shown in FIG. 2.

[0047] Figure 3 A RB model structure schematic diagram of the steam turbine provided for the second embodiment of the present application is shown in FIG. 3.

[0048] Figure 4 A bypass regulation model structure schematic diagram provided for the second embodiment of the present application is shown in FIG. 4.

[0049] Figure 5 A steam turbine thermal auxiliary shielding model structure schematic diagram provided for the second embodiment of the present application is shown in FIG. 5.

[0050] Figure 6 A structure block diagram of a steam turbine unit fault regulation system provided for the third embodiment of the present application is shown in FIG. 6.

[0051] Figure 7 A structure block diagram of an electronic device provided for the fourth embodiment of the present application is shown in FIG. 7. DETAILED DESCRIPTION

[0052] The steam turbine unit fault regulation method and system provided by the embodiments of the present application can solve the technical problem that the existing steam turbine unit fault regulation method mainly relies on manual regulation, which is time-consuming and laborious, and the control is unstable, which easily produces additional safety risks and reduces the reliability of LNG unit operation.

[0053] In order to make the technical scheme of the present application clearer and easier to understand, the technical scheme 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 embodiments described below are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0054] Please refer to Figure 1 , A step flow chart of a steam turbine unit fault regulation method provided for the first embodiment of the present application is shown in FIG. 1. Figure 1 A step flow chart of a steam turbine unit fault regulation method provided for the first embodiment of the present application is shown in FIG. 1.

[0055] The steam turbine unit fault regulation method provided by the present application comprises:

[0056] In step 101, in response to the received steam turbine fault regulation request, the gas turbine load of the steam turbine unit to be regulated is obtained, and it is determined whether the gas turbine load is greater than a preset trip threshold.

[0057] The turbine trip request refers to a turbine trip signal sent by the turbine trip.

[0058] The trip threshold refers to 10% rated load of the gas turbine.

[0059] In the embodiment of the present application, when the turbine trip signal is received, the gas turbine load of the turbine unit to be adjusted is obtained, and it is judged whether the gas turbine load is greater than the preset trip threshold.

[0060] In step 102, when the gas turbine load is greater than the trip threshold, the gas turbine load of the turbine unit to be adjusted is obtained, and a turbine trip signal is generated.

[0061] In the embodiment of the present application, when the gas turbine load is greater than the trip threshold, the gas turbine load of the turbine unit to be adjusted is obtained, and a turbine trip RB alarm is triggered to generate a turbine trip signal.

[0062] In step 103, the turbine trip signal is input into a preset automatic control model to obtain a target control model.

[0063] In the embodiment of the present application, the turbine trip signal is input into a preset automatic control model to obtain a target control model, wherein the target control model includes a bypass regulation model and a turbine thermal auxiliary shielding model.

[0064] In step 104, the bypass regulation valve associated with the turbine unit to be adjusted is overdriven to open, and the overdrive time of the bypass pressure reducing valve is obtained in real time.

[0065] The bypass regulation valve refers to the high, medium and low pressure bypass pressure reducing valves and the temperature reducing valve associated with the turbine unit to be adjusted.

[0066] In the embodiment of the present application, the high, medium and low pressure bypass pressure reducing valves associated with the turbine unit to be adjusted are overdriven to open, the temperature reducing valve associated with each pressure reducing valve is overdriven to open through the opening degree feedforward signal of the high, medium and low pressure bypass pressure reducing valves, and the overdrive time of the bypass pressure reducing valve is obtained in real time.

[0067] In step 105, based on the overdrive time, the turbine unit to be adjusted is adjusted according to the target control model and the gas turbine load.

[0068] In the embodiment of the present application, when the override time is greater than or equal to the preset override threshold, the associated turbine regulating system, the pressure reducing regulating valve and the temperature reducing regulating valve of the turbine unit to be adjusted are fault-adjusted by the target control model. It is judged whether the gas turbine load is higher than the preset gas turbine RB target load. When the gas turbine load is higher than the gas turbine RB target load, the gas turbine load is quickly reduced to the RB target load. When the gas turbine load is lower than or equal to the gas turbine RB target load, the current gas turbine load is maintained.

[0069] It should be noted that the gas turbine RB target load refers to 60% of the rated load of the gas turbine.

[0070] It should be noted that the turbine regulating system includes an auxiliary steam pressure system, a turbine shaft seal pressure system, a condensate water system, a circulating water regulating system, etc.

[0071] In the embodiment of the present application, the gas turbine load of the turbine unit to be adjusted is obtained, and the turbine unit to be adjusted is fault-adjusted according to the gas turbine load and the preset automatic control model, which overcomes the technical problem that the existing turbine unit fault-adjusting method mainly relies on manual adjustment, which is time-consuming and laborious, and the control is unstable, which easily produces additional safety risks, and reduces the reliability of LNG unit operation. Compared with the traditional fault-adjusting method, the present application realizes the rapid reduction of the gas turbine load of the turbine unit to be adjusted to the trip threshold value through the gas turbine load and the preset automatic control model, and releases the boiler steam through the bypass regulating valve associated with the turbine unit to be adjusted to stabilize the steam pressure, avoiding the complexity and instability of manual adjustment, and improving the reliability of LNG unit operation.

[0072] Please refer to Figure 2 , Figure 2 The step flow chart of a turbine unit fault-adjusting method provided in the second embodiment of the present application.

[0073] The turbine unit fault-adjusting method provided by the present application comprises:

[0074] Step 201, in response to the received turbine fault-adjusting request, the gas turbine load of the turbine unit to be adjusted is obtained, and it is judged whether the gas turbine load is greater than the preset trip threshold value;

[0075] In the embodiment of the present application, in response to the received turbine trip signal, the gas turbine load of the turbine unit to be adjusted is obtained, and it is judged whether the gas turbine load is greater than the preset trip threshold value.

[0076] Step 202, when the gas turbine load is greater than the trip threshold value, the gas turbine load of the turbine unit to be adjusted is obtained, and a turbine trip signal is generated;

[0077] In the embodiment of the present application, please refer to Figure 3As shown, when the turbine trip signal is received and the gas turbine load is greater than the trip threshold, then the turbine trip RB is triggered, a turbine trip signal is generated, and the gas turbine load of the turbine unit to be adjusted is obtained.

[0078] It should be noted that the turbine trip signal delay 400s or the gas turbine trip is automatically reset.

[0079] Step 203, input the turbine trip signal into the preset automatic control model to obtain a target control model;

[0080] In the embodiment of the application, the turbine trip signal is taken as the turbine trip RB action signal of the preset automatic control model to obtain the target control model.

[0081] Step 204, perform an override opening operation on the bypass regulation valve associated with the turbine unit to be adjusted, and obtain the override time of the bypass pressure reduction regulation valve in real time;

[0082] Further, step 204 includes the following sub-steps:

[0083] S11, a preset override pulse is sent to the bypass pressure reduction regulation valve, so that the bypass pressure reduction regulation valve is executed in response to the override pulse, and a bypass pressure reduction valve opening degree feedforward signal after execution is output;

[0084] In the embodiment of the application, the preset override pulse is put into the automatic bypass pressure reduction regulation valve, so that the bypass pressure reduction regulation valve is opened to 50% in override, and a bypass pressure reduction valve opening degree feedforward signal after opening is output.

[0085] S12, the bypass pressure reduction valve opening degree feedforward signal is used for opening degree adjustment of the bypass temperature reduction regulation valve.

[0086] In the embodiment of the application, the bypass pressure reduction valve opening degree feedforward signal is used for opening degree adjustment of the bypass temperature reduction regulation valve, so that the bypass temperature reduction regulation valve is opened to 70%.

[0087] Step 205, based on the override time, the turbine unit to be adjusted is adjusted according to the target control model;

[0088] Further, the target control model includes a bypass regulation model and a turbine thermal auxiliary shielding model, and step 205 includes the following sub-steps:

[0089] S21, it is judged whether the override time is greater than or equal to a preset override threshold;

[0090] The override threshold refers to the time when the bypass pressure reduction regulation valve and the bypass temperature reduction regulation valve are opened when the turbine trips.

[0091] In the embodiment of the application, it is judged whether the override time reaches the preset override threshold.

[0092] S22, if the override time is greater than or equal to the override threshold value, inputting bypass working condition parameters of the steam turbine unit to be adjusted into a bypass regulation model to obtain a bypass control instruction;

[0093] Further, referring to Figure 4 As shown in the figure, the bypass working condition parameters include a steam turbine load, a steam turbine bypass pressure and a bypass steam temperature, the bypass regulation model includes an optimization control module, a bypass pressure reduction regulation model and a bypass temperature reduction regulation model, and S22 includes the following sub-steps:

[0094] S221, performing pressure reduction control operation on the steam turbine load, the steam turbine bypass pressure and a preset bypass pressure offset value through the bypass pressure reduction regulation model to obtain a steam turbine bypass pressure reduction valve opening degree instruction;

[0095] In the embodiment of the present application, the pressure reduction control operation is performed on the steam turbine load, the steam turbine bypass pressure and the preset bypass pressure offset value through the bypass pressure reduction regulation model, wherein the bypass pressure reduction regulation model includes a first optimization control module, an adder, a first PID controller and a first MA controller. The steam turbine load is controlled through the first optimization control model to obtain a bypass pressure reference instruction, the bypass pressure reference instruction and the preset bypass pressure offset value are added through the adder to obtain a first sum, and the first sum and the steam turbine bypass pressure are controlled through the first PID controller and the first MA controller to obtain the steam turbine bypass pressure reduction valve opening degree instruction.

[0096] S222, performing optimization control on the steam turbine bypass pressure reduction valve opening degree instruction through the optimization control module to obtain a first optimization instruction;

[0097] In the embodiment of the present application, the steam turbine bypass pressure reduction valve opening degree instruction is input into the optimization control module to obtain the first optimization instruction.

[0098] S223, performing temperature reduction control operation on the first optimization instruction, the bypass steam temperature and a preset bypass temperature set value through the bypass temperature reduction regulation model to obtain a steam turbine bypass temperature reduction valve opening degree instruction;

[0099] In the embodiment of the present application, the temperature reduction control operation is performed on the first optimization instruction, the bypass steam temperature and the preset bypass temperature set value through the bypass temperature reduction regulation model, wherein the bypass temperature reduction regulation model includes a second PID controller and a second MA controller. The first optimization instruction, the bypass steam temperature and the preset bypass temperature set value are controlled through the second PID controller and the second MA controller to obtain the steam turbine bypass temperature reduction valve opening degree instruction.

[0100] S224, using the steam turbine bypass pressure reduction valve opening degree instruction and the steam turbine bypass temperature reduction valve opening degree instruction as the bypass control instruction.

[0101] In the embodiment of the present application, the turbine bypass pressure reducing valve opening degree instruction and the turbine bypass pressure reducing valve opening degree instruction are taken as the bypass control instruction.

[0102] S23, input the electrical quantity parameter of the steam turbine unit to be adjusted into the steam turbine thermal auxiliary shielding model to obtain a shielding instruction;

[0103] The electrical quantity parameter refers to the measured value, control instruction and control feedback of the to-be-adjusted steam turbine unit.

[0104] In the embodiment of the present application, referring to Figure 5 As shown in the figure, the electrical quantity parameter of the to-be-adjusted steam turbine unit is automatically controlled by the steam turbine thermal auxiliary shielding model to obtain a shielding instruction.

[0105] S24, the bypass control instruction and the shielding instruction are used to control the to-be-adjusted steam turbine unit;

[0106] In the embodiment of the present application, the bypass control instruction and the shielding instruction are sent to the to-be-adjusted steam turbine unit to control the to-be-adjusted steam turbine unit.

[0107] S25, if the override time is less than the override threshold, then jump to execute the step of obtaining the override time of the bypass pressure reducing valve in real time until the override time is greater than or equal to the override threshold.

[0108] In the embodiment of the present application, when the override time is less than the override threshold, then jump to execute step 204.

[0109] Step 206, judge whether the gas turbine load is greater than a preset gas turbine adjustment threshold;

[0110] The gas turbine adjustment threshold refers to the gas turbine RB target load (60% of the rated load of the gas turbine).

[0111] In the embodiment of the present application, it is judged whether the gas turbine load is greater than the preset gas turbine RB target load.

[0112] Step 207, if the gas turbine load is greater than the gas turbine adjustment threshold, then perform a load reduction operation on the gas turbine of the to-be-adjusted steam turbine unit, and jump to execute the step of obtaining the gas turbine load of the to-be-adjusted steam turbine unit until the gas turbine load is less than or equal to the gas turbine adjustment threshold.

[0113] In the embodiment of the present application, if the gas turbine load is greater than the gas turbine RB target load, then perform a load reduction operation on the gas turbine of the to-be-adjusted steam turbine unit until the gas turbine load is less than or equal to the gas turbine RB target load.

[0114] Step 208, if the gas turbine load is less than or equal to the gas turbine adjustment threshold, then keep the gas turbine in the running state at the current time for continuous operation.

[0115] In the embodiment of the present application, if the gas turbine load is less than or equal to the RB target load of the gas turbine, the gas turbine is kept in the running state at the current time for continuous running.

[0116] Further, it also comprises:

[0117] A1, when the gas turbine load is greater than the trip threshold, it is judged whether the to-be-adjusted steam turbine unit supplies heat to the outside;

[0118] In the embodiment of the present application, when the gas turbine load is greater than the trip threshold, it is checked whether the to-be-adjusted steam turbine unit supplies heat to the outside.

[0119] A2, when the to-be-adjusted steam turbine unit supplies heat to the outside, the steam turbine heat supply loop of the to-be-adjusted steam turbine unit is disconnected, and the waste heat boiler heat supply loop of the to-be-adjusted steam turbine unit is closed.

[0120] In the embodiment of the present application, when the to-be-adjusted steam turbine unit supplies heat to the outside, the steam turbine heat supply loop of the to-be-adjusted steam turbine unit is disconnected, and the waste heat boiler heat supply loop of the to-be-adjusted steam turbine unit is closed, and the heat supply steam temperature and pressure set value are kept as the heat supply steam pressure and heat supply steam temperature before the trip of the steam turbine.

[0121] In the embodiment of the present application, by acquiring the gas turbine load of the to-be-adjusted steam turbine unit, the to-be-adjusted steam turbine unit is adjusted according to the gas turbine load and the preset automatic control model, which overcomes the technical problem that the existing steam turbine unit fault adjustment method mainly relies on manual adjustment, which is time-consuming and laborious, and the control is unstable, and additional safety risks are easily generated, and the reliability of the LNG unit operation is reduced. Compared with the traditional fault adjustment method, the gas turbine load of the to-be-adjusted steam turbine unit is quickly reduced to the trip threshold by the gas turbine load and the preset automatic control model, and the boiler steam is released through the bypass adjustment valve associated with the to-be-adjusted steam turbine unit to stabilize the steam pressure, avoiding the complexity and instability of manual adjustment, and improving the reliability of the LNG unit operation.

[0122] Please refer to Figure 6 , Figure 6 The structure block diagram of a steam turbine unit fault adjustment system provided for the third embodiment of the present application.

[0123] The steam turbine unit fault adjustment system provided by the present application comprises:

[0124] The monitoring module 301 is used for acquiring the gas turbine load of the to-be-adjusted steam turbine unit in response to the received steam turbine fault adjustment request, and judging whether the gas turbine load is greater than the preset trip threshold;

[0125] The first analysis module 302 is configured to acquire the gas turbine load of the steam turbine unit to be regulated and generate a steam turbine trip signal when the gas turbine load is greater than a trip threshold value;

[0126] The second analysis module 303 is configured to input the steam turbine trip signal into a preset automatic control model to obtain a target control model;

[0127] The override module 304 is configured to perform an override opening operation on the bypass regulation valve associated with the steam turbine unit to be regulated and acquire an override time of the bypass pressure reduction regulation valve in real time;

[0128] The regulation module 305 is configured to perform fault regulation on the steam turbine unit to be regulated based on the override time, the target control model and the gas turbine load.

[0129] Further, the override module 304 comprises:

[0130] The pressure reduction regulation sub-module is configured to issue a preset override pulse to the bypass pressure reduction regulation valve, so that the bypass pressure reduction regulation valve is executed in response to the override pulse and outputs a bypass pressure reduction valve opening degree feedforward signal after execution;

[0131] The temperature reduction regulation sub-module is configured to perform opening degree regulation on the bypass temperature reduction regulation valve by using the bypass pressure reduction valve opening degree feedforward signal.

[0132] Further, the regulation module 305 comprises:

[0133] The fault regulation sub-module is configured to perform fault regulation on the steam turbine unit to be regulated based on the target control model and the override time;

[0134] The first analysis sub-module is configured to determine whether the gas turbine load is greater than a preset gas turbine regulation threshold value;

[0135] If the gas turbine load is greater than the gas turbine regulation threshold value, the gas turbine of the steam turbine unit to be regulated is subjected to a load reduction operation, and the step of acquiring the gas turbine load of the steam turbine unit to be regulated is executed until the gas turbine load is less than or equal to the gas turbine regulation threshold value;

[0136] If the gas turbine load is less than or equal to the gas turbine regulation threshold value, the gas turbine is kept in the running state at the current time for continuous running.

[0137] Further, the target control model comprises a bypass regulation model and a steam turbine thermal auxiliary shielding model, and the fault regulation sub-module comprises:

[0138] The first analysis unit is configured to determine whether the override time is greater than or equal to a preset override threshold value;

[0139] The first adjusting unit is configured to input the bypass working condition parameters of the steam turbine unit to be adjusted into a bypass adjusting model if the override time is greater than or equal to the override threshold value, to obtain a bypass control instruction;

[0140] The second adjusting unit is configured to input the electrical quantity parameters of the steam turbine unit to be adjusted into a steam turbine thermal auxiliary shielding model, to obtain a shielding instruction;

[0141] The fault adjusting unit is configured to perform fault regulation and control on the steam turbine unit to be adjusted by using the bypass control instruction and the shielding instruction.

[0142] The second analysis unit is configured to jump to the step of obtaining the override time of the bypass pressure reducing valve in real time if the override time is less than the override threshold value, until the override time is greater than or equal to the override threshold value.

[0143] Further, the bypass working condition parameters include a steam turbine load, a steam turbine bypass pressure and a bypass steam temperature, the bypass adjusting model includes an optimization control module, a bypass pressure reducing adjusting model and a bypass temperature reducing adjusting model, and the first adjusting unit includes:

[0144] The pressure reducing adjusting sub-unit is configured to perform pressure reducing regulation and control on the steam turbine load, the steam turbine bypass pressure and a preset bypass pressure offset value by using the bypass pressure reducing adjusting model, to obtain a steam turbine bypass pressure reducing valve opening degree instruction.

[0145] The optimization adjusting sub-unit is configured to perform optimization control on the steam turbine bypass pressure reducing valve opening degree instruction by using the optimization control module, to obtain a first optimization instruction.

[0146] The temperature reducing adjusting sub-unit is configured to perform temperature reducing regulation and control on the first optimization instruction, the bypass steam temperature and a preset bypass temperature set value by using the bypass temperature reducing adjusting model, to obtain a steam turbine bypass temperature reducing valve opening degree instruction.

[0147] The steam turbine bypass pressure reducing valve opening degree instruction and the steam turbine bypass temperature reducing valve opening degree instruction are used as the bypass control instruction.

[0148] Further, the method further includes:

[0149] The heat supply adjusting module is configured to determine whether the steam turbine unit to be adjusted supplies heat to the outside when the gas turbine load is greater than a trip threshold value.

[0150] When the steam turbine unit to be adjusted supplies heat to the outside, the steam turbine heat supply loop of the steam turbine unit to be adjusted is disconnected, and the waste heat boiler heat supply loop of the steam turbine unit to be adjusted is closed.

[0151] Please refer to Figure 7 , Figure 7 A structural block diagram of an electronic device provided for the fourth embodiment of the present application.

[0152] The electronic device of the embodiment of the application comprises a memory 401 and a processor 402, the memory 401 stores a computer program; the computer program is executed by the processor 402, so that the processor 402 executes the steam turbine unit fault regulation method of any one of the above embodiments.

[0153] The memory 401 can be an electronic memory such as a flash memory, an EEPROM (Electrically Erasable Programmable Read-Only Memory), an EPROM, a hard disk or a ROM. The memory 401 has a storage space 403 for program codes 413 for executing any of the method steps described above. For example, the storage space 403 for program codes can comprise individual program codes 413 for implementing the various steps in the above method, respectively. These program codes can be read from or written to one or more computer program products. These computer program products comprise program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks. The program codes can be compressed in a suitable form, for example. These codes, when executed by a computing processing device, cause the computing processing device to perform the individual steps in the method described above.

[0154] The fifth embodiment of the application also provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the steam turbine unit fault regulation method of any one of the above embodiments.

[0155] The sixth embodiment of the application also provides a computer program product, which comprises a computer program stored on a non-transitory computer readable storage medium, and the computer program comprises program instructions, wherein when the program instructions are executed by a computer, the computer executes the steam turbine unit fault regulation method of any one of the above embodiments.

[0156] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0157] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed mutual units can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0158] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., may be located in one place, or may be distributed to multiple network units. Part or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.

[0159] In addition, each functional unit in each embodiment of the application can be integrated into one processing unit, or each unit can exist physically, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0160] If the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the application, the essential part or the whole or part of the prior art, or the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method of each embodiment of the application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0161] The above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. A method of faulted governing of a steam turbine unit, characterized in that, The method comprises the following steps: in response to the received steam turbine fault regulation request, obtaining the gas turbine load of the steam turbine unit to be regulated, and determining whether the gas turbine load is greater than a preset trip threshold value; when the gas turbine load is greater than the trip threshold value, obtaining the gas turbine load of the steam turbine unit to be regulated, and generating a steam turbine trip signal; inputting the steam turbine trip signal into a preset automatic control model to obtain a target control model; overriding the bypass regulation valve associated with the steam turbine unit to be regulated, and obtaining the override time of the bypass regulation valve in real time; based on the override time, regulating the steam turbine unit to be regulated according to the target control model and the gas turbine load; the bypass regulation valve comprises a bypass pressure reduction regulation valve and a bypass temperature reduction regulation valve, and the step of overriding the bypass regulation valve associated with the steam turbine unit to be regulated comprises: sending a preset override pulse to the bypass pressure reduction regulation valve, so that the bypass pressure reduction regulation valve executes in response to the override pulse, and outputs a bypass pressure reduction valve opening degree feedforward signal after execution; using the bypass pressure reduction valve opening degree feedforward signal to adjust the opening degree of the bypass temperature reduction regulation valve; the step of regulating the steam turbine unit to be regulated based on the override time, the target control model and the gas turbine load comprises: based on the override time, regulating the steam turbine unit to be regulated according to the target control model; determining whether the gas turbine load is greater than a preset gas turbine regulation threshold value; if the gas turbine load is greater than the gas turbine regulation threshold value, performing a load reduction operation on the gas turbine of the steam turbine unit to be regulated, and jumping to execute the step of obtaining the gas turbine load of the steam turbine unit to be regulated until the gas turbine load is less than or equal to the gas turbine regulation threshold value; if the gas turbine load is less than or equal to the gas turbine regulation threshold value, the gas turbine is kept in the running state at the current time.

2. The method of claim 1, wherein, the target control model comprises a bypass regulation model and a steam turbine thermal auxiliary shielding model, and the step of regulating the steam turbine unit to be regulated based on the override time, the target control model and the gas turbine load comprises: determining whether the override time is greater than or equal to a preset override threshold value; if the override time is greater than or equal to the override threshold value, inputting the bypass working condition parameters of the steam turbine unit to be regulated into the bypass regulation model to obtain a bypass control instruction; inputting the electrical quantity parameters of the steam turbine unit to be regulated into the steam turbine thermal auxiliary shielding model to obtain a shielding instruction; using the bypass control instruction and the shielding instruction to regulate and control the steam turbine unit to be regulated; if the override time is less than the override threshold value, jumping to execute the step of obtaining the override time of the bypass pressure reduction regulation valve in real time until the override time is greater than or equal to the override threshold value.

3. The method of claim 2, wherein, The bypass working condition parameters include turbine load, turbine bypass pressure and bypass steam temperature, the bypass regulation model includes an optimization control module, a bypass pressure reduction regulation model and a bypass temperature reduction regulation model, the step of inputting the bypass working condition parameters of the turbine unit to be regulated into the bypass regulation model to obtain a bypass control instruction includes: performing pressure reduction regulation operation on the turbine load, the turbine bypass pressure and a preset bypass pressure offset value through the bypass pressure reduction regulation model to obtain a turbine bypass pressure reduction valve opening degree instruction; performing optimization control on the turbine bypass pressure reduction valve opening degree instruction through the optimization control module to obtain a first optimization instruction; performing temperature reduction regulation operation on the first optimization instruction, the bypass steam temperature and a preset bypass temperature set value through the bypass temperature reduction regulation model to obtain a turbine bypass temperature reduction valve opening degree instruction; adopting the turbine bypass pressure reduction valve opening degree instruction and the turbine bypass temperature reduction valve opening degree instruction as the bypass control instruction.

4. The method of fault conditioning of a steam turbine unit according to any one of claims 1-3, characterized in that, Further comprising: when the gas turbine load is greater than the trip threshold, judging whether the turbine unit to be regulated supplies heat to the outside; when the turbine unit to be regulated supplies heat to the outside, disconnecting the turbine heat supply loop of the turbine unit to be regulated and closing the waste heat boiler heat supply loop of the turbine unit to be regulated.

5. A steam turbine unit fault regulating system for use in the steam turbine unit fault regulating method according to any one of claims 1 to 4, characterized by Comprising: a monitoring module configured to acquire the gas turbine load of the turbine unit to be regulated in response to a received turbine fault regulation request and judge whether the gas turbine load is greater than a preset trip threshold; a first analysis module configured to acquire the gas turbine load of the turbine unit to be regulated and generate a turbine trip signal when the gas turbine load is greater than the trip threshold; a second analysis module configured to input the turbine trip signal into a preset automatic control model to obtain a target control model; an override module configured to perform override opening operation on a bypass regulation valve associated with the turbine unit to be regulated and acquire an override time of the bypass regulation valve in real time; a regulation module configured to perform fault regulation on the turbine unit to be regulated based on the override time, the target control model and the gas turbine load.

6. An electronic device, comprising: The computer program is executed to implement the turbine unit fault regulation method according to any one of claims 1-4.

7. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed to implement the turbine unit fault regulation method according to any one of claims 1-4.

8. A computer program product, characterised in that, The computer program product comprises a computer program stored on a non-transitory computer readable storage medium, and the computer program comprises program instructions, wherein when the program instructions are executed by a computer, the computer executes the turbine unit fault regulation method according to any one of claims 1-4.

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