CN118423140A - Method and device for controlling sliding parameter steam stop machine of gas turbine set, storage medium and equipment - Google Patents
Method and device for controlling sliding parameter steam stop machine of gas turbine set, storage medium and equipment Download PDFInfo
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Abstract
The disclosure relates to a method, a device, a storage medium and equipment for controlling a slip parameter steam stop machine of a gas turbine set, wherein the method comprises the following steps: setting a cylinder temperature target value of the steam turbine; setting a second operation parameter limit value, wherein the second operation parameter limit value is one or more of a steam turbine cylinder temperature falling rate limit value, a steam turbine main steam temperature falling rate limit value, a gas turbine load falling rate limit value, a steam turbine upper and lower cylinder temperature difference limit value and a steam turbine main steam temperature difference limit value; setting a steam-turbine main steam desuperheating water temperature set value and a gas turbine load set value; by automatically controlling the sliding parameters of the gas engine and the gas engine, the accuracy and the reliability of the operation of the gas engine stopping machine of the gas engine set are improved, the manual labor force is greatly saved, and the working efficiency is improved.
Description
Technical Field
The disclosure relates to the field of gas turbine unit slip parameter steam stop control, in particular to a gas turbine unit slip parameter steam stop control method, a device, a storage medium and equipment.
Background
At present, the traditional gas-steam combined cycle unit power plant has large turbine slip parameter shutdown operation quantity, basically adopts manual operation, has high control requirement and large risk of important protection parameters such as temperature difference, expansion difference, axial displacement and the like of a turbine cylinder in the operation process, and needs a certain reaction time from eyes to brain to hands in manual operation, and the manual operation is carried out through steam temperature adjustment and unit load adjustment.
Disclosure of Invention
The purpose of the present disclosure is to provide a method, a device, a storage medium and a device for controlling a slip parameter of a gas turbine unit, which are used for solving the problems that in the prior art, in the control of the shutdown of a gas turbine unit power plant, each parameter control cannot reach an ideal range, a great deal of manpower is required to be input, and the working efficiency is low.
To achieve the above object, a first aspect of an embodiment of the present disclosure provides a method for controlling a gas turbine set slip parameter steam turbine, the method including:
Setting a cylinder temperature target value of the steam turbine;
Setting a second operation parameter limit value, wherein the second operation parameter limit value is one or more of a steam turbine cylinder temperature falling rate limit value, a steam turbine main steam temperature falling rate limit value, a gas turbine load falling rate limit value, a steam turbine upper and lower cylinder temperature difference limit value and a steam turbine main steam temperature difference limit value;
setting a steam-turbine main steam desuperheating water temperature set value and a gas turbine load set value;
Controlling the descending speed of the main steam temperature of the steam turbine or/and the descending speed of the load of the fuel engine according to the second operation parameter limit value so as to control the real-time value of the main steam temperature of the steam turbine to slide downwards towards the set value of the temperature reduction water temperature of the main steam of the steam turbine and control the real-time value of the load of the fuel engine to slide downwards towards the set value of the load of the fuel engine;
Controlling a cylinder Wen Shi time value to slide downwards towards the cylinder temperature target value according to the cylinder temperature reduction rate limit value in the process of sliding the main steam temperature real-time value and the load real-time value of the gas turbine;
and stopping the steam turbine when the completion of the downward sliding of the steam turbine cylinder temperature is determined according to the steam turbine cylinder Wen Shi time value and the steam turbine cylinder temperature target value.
Optionally, the method further comprises:
performing real-time value control on the main steam temperature of the steam turbine through a main steam temperature reducing water temperature reducing instruction;
And performing the control of the real-time value of the engine load through the engine load lowering command.
Optionally, controlling the rate of decrease of the main steam temperature of the turbine or/and controlling the rate of decrease of the load of the combustion engine according to the second operation parameter limit value comprises:
according to the second operation parameter limit value, controlling the steam temperature rate to control the descending rate of the main steam temperature of the steam turbine;
and according to the second operation parameter limit value, carrying out load rate control to control the dropping rate of the load of the fuel engine.
Optionally, the controlling the steam temperature rate according to the second operation parameter limit value to control the decreasing rate of the main steam temperature of the steam turbine includes:
monitoring a real-time value of a temperature decrease rate of a cylinder in real-time value control of a main steam temperature of the steam turbine, the real-time value of the temperature decrease rate of the main steam of the steam turbine and a real-time value of a temperature difference of the main steam of the steam turbine;
And controlling the descending speed of the temperature of the main steam by freezing the main steam temperature-reducing water cooling instruction or releasing the main steam temperature-reducing water cooling instruction according to the real-time value of the temperature descending speed of the cylinder, the real-time value of the temperature descending speed of the main steam of the steam turbine, the real-time value of the temperature difference of the main steam of the steam turbine and the second operation parameter limit value.
Optionally, the controlling the load rate according to the second operation parameter limit value to control the dropping rate of the load includes:
Monitoring a real-time value of a temperature difference between an upper cylinder and a lower cylinder of a gas turbine and a real-time value of a load reduction rate of the gas turbine in the control of the real-time value of the load of the gas turbine;
And controlling the descending speed of the load by freezing the descending fuel engine load instruction or releasing the descending fuel engine load instruction according to the real-time value of the temperature difference between the upper cylinder and the lower cylinder of the steam turbine, the real-time value of the descending speed of the fuel engine load and the second operation parameter limit value.
Optionally, the controlling the real-time value of the main steam temperature of the steam turbine by the main steam temperature reducing water temperature reducing instruction comprises the following steps:
switching the steam temperature control fixed value to the main steam temperature reducing water temperature set value through the main steam temperature reducing water temperature reducing instruction;
And controlling the real-time value of the main steam temperature of the steam turbine to be reduced to the main steam temperature setting value through the main steam temperature reducing PID according to the main steam temperature setting value.
Optionally, the controlling the real-time value of the engine load by the engine load lowering command includes:
switching a load control fixed value to the gas turbine load set value through the gas turbine load lowering instruction;
And controlling the real-time value of the fuel engine load to drop to the fuel engine load set value through the fuel engine load PID according to the fuel engine load set value.
Optionally, before the sliding parameter control, the method further includes:
and performing sliding parameter preparation, wherein the sliding parameter preparation comprises one or more of unit sliding stop mode judgment, automatic steam turbine bypass and bypass attemperation water injection, standby interlocking input of a steam turbine drain valve group, automatic main steam attemperation water injection, check of steam turbine bypass and attemperation water valve states, circulating water pump and condensate pump running states and steam turbine drain valve group interlocking states.
Optionally, the disabling the turbine when determining that the cylinder temperature sliding is completed according to the cylinder Wen Shi time value and the cylinder temperature target value includes:
Detecting the disconnection state of the steam turbine when the temperature of the steam turbine cylinder is complete, wherein the disconnection state of the steam turbine comprises a state that a neutral point of a generator is grounded;
According to the gas turbine disconnection state and the gas turbine disconnection state, stopping the gas turbine through a gas turbine stopping instruction;
And after the gas engine is stopped, the gas engine is stopped by triggering the non-gas engine to drag and protect the gas engine.
A second aspect of the embodiments of the present disclosure provides a gas turbine set slip parameter steam stop control device, the device including:
the first setting module is used for setting a cylinder temperature target value of the steam turbine;
The second setting module is used for setting a second operation parameter limit value, wherein the second operation parameter limit value is one or more of a steam turbine cylinder temperature falling speed limit value, a steam turbine main steam temperature falling speed limit value, a gas turbine load falling speed limit value, a steam turbine upper and lower cylinder temperature difference limit value and a steam turbine main steam temperature difference limit value;
The third setting module is used for setting a temperature set value of the main steam desuperheating water of the steam turbine and a load set value of the gas turbine;
The first control module is used for controlling the falling rate of the main steam temperature of the gas turbine or/and the falling rate of the load of the gas turbine according to the second operation parameter limit value so as to control the real-time value of the main steam temperature of the gas turbine to slide downwards towards the set value of the main steam temperature reduction water temperature and control the real-time value of the load of the gas turbine to slide downwards towards the set value of the load of the gas turbine;
and the second control module is used for controlling the cylinder Wen Shi time value to slide downwards towards the cylinder temperature target value according to the cylinder temperature reduction rate limit value in the process of sliding the main steam temperature real-time value and the load real-time value of the gas turbine.
And the shutdown module is used for shutting down the steam turbine when the temperature of the steam turbine cylinder is determined to be complete according to the cylinder Wen Shi time value and the cylinder temperature target value.
A third aspect of the present disclosure provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the gas turbine engine slip parameter steam stop control method provided by the first aspect of the present disclosure.
A fourth aspect of the present disclosure provides an electronic device, comprising:
A memory having a computer program stored thereon;
and the processor is used for executing the computer program in the memory to realize the steps of the gas turbine set slip parameter steam stop control method provided in the first aspect of the disclosure.
Through the technical scheme, the target value of the cylinder temperature of the steam turbine is set; setting a second operation parameter limit value, wherein the second operation parameter limit value is one or more of a steam turbine cylinder temperature falling rate limit value, a steam turbine main steam temperature falling rate limit value, a gas turbine load falling rate limit value, a steam turbine upper and lower cylinder temperature difference limit value and a steam turbine main steam temperature difference limit value; setting a steam-turbine main steam desuperheating water temperature set value and a gas turbine load set value; controlling the descending speed of the main steam temperature of the gas turbine or/and the descending speed of the load of the gas turbine according to the second operation parameter limit value so as to control the real-time value of the main steam temperature of the gas turbine to slide downwards towards the set value of the temperature of the main steam temperature-reducing water of the gas turbine and control the real-time value of the load of the gas turbine to slide downwards towards the set value of the load of the gas turbine; in the process of sliding down the main steam temperature real-time value and the fuel engine load real-time value, controlling the engine cylinder Wen Shi real-time value to slide down towards the engine cylinder temperature target value according to the limit value of the engine cylinder temperature descending speed; and stopping the steam turbine when the temperature of the steam turbine cylinder is determined to slide down according to the cylinder Wen Shi time value and the cylinder temperature target value. The sliding parameter control can be automatically performed according to the target value of the cylinder temperature of the gas turbine and the limit value of the temperature drop rate of the cylinder temperature of the gas turbine, so that the accuracy and the reliability of the operation of the gas turbine set are improved, and meanwhile, the manual labor force can be greatly saved and the working efficiency can be improved because no manual duty is needed.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
FIG. 1 is a flow chart illustrating a gas turbine set slip parameter steam stop control method according to an exemplary embodiment.
FIG. 2 is a flow chart illustrating another gas turbine set slip parameter steam stop control method according to an example embodiment.
FIG. 3 is a flowchart illustrating another gas turbine set slip parameter steam stop control method, according to an example embodiment.
FIG. 4 is a flowchart illustrating another gas turbine set slip parameter steam stop control method, according to an example embodiment.
FIG. 5 is a flowchart illustrating another gas turbine set slip parameter steam stop control method, according to an example embodiment.
FIG. 6 is a flowchart illustrating another gas turbine set slip parameter steam stop control method, according to an example embodiment.
Fig. 7 is a flow chart illustrating a real-time value control of the main steam temperature of a steam turbine and a real-time value control of the load of a gas turbine, according to an exemplary embodiment.
FIG. 8 is a flow chart illustrating a slip parameter shutdown sequence control, according to an example embodiment.
FIG. 9 is a block diagram illustrating a gas turbine set slip parameter steam stop control device according to an example embodiment.
Fig. 10 is a block diagram of an electronic device, according to an example embodiment.
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
It should be noted that, all actions for acquiring signals, information or data in the present disclosure are performed under the condition of conforming to the corresponding data protection rule policy of the country of the location and obtaining the authorization given by the owner of the corresponding device.
FIG. 1 is a flow chart illustrating a gas turbine set slip parameter steam stop control method, as shown in FIG. 1, including the steps of:
in step S11, a cylinder temperature target value is set.
The cylinder temperature is, for example, the cylinder temperature of a steam turbine in a gas-steam combination. The cylinder temperature target value is the cylinder temperature required by the shutdown of the steam turbine, and can be set according to the actual working condition of the power plant.
In step S12, a second operation parameter limit is set, where the second operation parameter limit is one or more of a cylinder temperature decrease rate limit, a main steam temperature decrease rate limit, a load decrease rate limit, a cylinder temperature difference limit, and a main steam temperature difference limit.
For example, the main steam temperature of the steam turbine may include high-pressure main steam and reheat steam, the difference between the upper and lower cylinder temperatures of the steam turbine is the difference between adjacent cylinders of the steam turbine (e.g., the temperature difference between the high-pressure cylinder and the intermediate-pressure cylinder), and the difference between the reheat steam temperature after the main steam is reheated and the high-pressure main steam temperature of the high-pressure part.
In step S13, a turbine main steam desuperheating water temperature set point and a turbine load set point are set.
Illustratively, the main steam attemperation water temperature setting and the gas turbine load setting of the gas turbine are set according to the requirements of the system and the process needs.
In step S14, according to the second operation parameter limit value, the rate of decrease of the main steam temperature of the turbine or/and the rate of decrease of the load of the combustion engine are controlled so as to control the real-time value of the main steam temperature of the turbine to slide down towards the set value of the temperature-reduced water temperature of the main steam of the turbine and to control the real-time value of the load of the combustion engine to slide down towards the set value of the load of the combustion engine.
Illustratively, the real-time value of the cylinder temperature decrease rate, the real-time value of the main steam temperature decrease rate, the real-time value of the upper and lower cylinder temperatures of the steam, the real-time value of the main steam temperature difference and the real-time value of the load decrease rate of the gas turbine are monitored, compared according to the second operation parameter limit value set in the step S12, and controlled according to the difference between the real-time value and the limit value, so that the real-time value of the main steam temperature is slid down to the main steam temperature-decreasing water temperature set value and the real-time value of the load of the gas turbine is slid down to the load set value of the gas turbine.
In step S15, during the process of sliding down the main steam temperature real-time value and the load real-time value of the combustion engine, the cylinder Wen Shi is controlled to slide down towards the cylinder temperature target value according to the cylinder temperature falling rate limit value.
For example, during the main steam temperature of the steam turbine and the load of the gas turbine sliding down, the temperature of the cylinder of the steam turbine correspondingly drops, and in order to ensure that the temperature of the cylinder of the steam turbine drops smoothly, the temperature of the cylinder is controlled to slide down towards a target value of the temperature of the cylinder according to the limiting value of the temperature drop rate of the cylinder of the steam turbine.
In step S16, the turbine is shut down when it is determined that the cylinder temperature slip is completed based on the cylinder Wen Shi time value and the cylinder temperature target value.
For example, the set cylinder temperature target value of the steam turbine is compared with the actual cylinder temperature value, and the comparison result is used as one of monitoring feedback and used as a feedback condition for completing the slip parameter.
Optionally, before the slip parameter control, the gas turbine set slip parameter steam stop control method further includes:
and performing sliding parameter preparation, wherein the sliding parameter preparation comprises one or more of unit sliding stop mode judgment, automatic steam turbine bypass and bypass attemperation water injection, standby interlocking input of a steam turbine drain valve group, automatic main steam attemperation water injection, check of steam turbine bypass and attemperation water valve states, circulating water pump and condensate pump running states and steam turbine drain valve group interlocking states.
Through the technical scheme, the target value of the cylinder temperature of the steam turbine is set; setting a second operation parameter limit value, wherein the second operation parameter limit value is one or more of a steam turbine cylinder temperature falling rate limit value, a steam turbine main steam temperature falling rate limit value, a gas turbine load falling rate limit value, a steam turbine upper and lower cylinder temperature difference limit value and a steam turbine main steam temperature difference limit value; setting a steam-turbine main steam desuperheating water temperature set value and a gas turbine load set value; controlling the descending speed of the main steam temperature of the gas turbine or/and the descending speed of the load of the gas turbine according to the second operation parameter limit value so as to control the real-time value of the main steam temperature of the gas turbine to slide downwards towards the set value of the temperature of the main steam temperature-reducing water of the gas turbine and control the real-time value of the load of the gas turbine to slide downwards towards the set value of the load of the gas turbine; in the process of sliding down the main steam temperature real-time value and the fuel engine load real-time value, controlling the engine cylinder Wen Shi real-time value to slide down towards the engine cylinder temperature target value according to the limit value of the engine cylinder temperature descending speed; and stopping the steam turbine when the temperature of the steam turbine cylinder is determined to slide down according to the cylinder Wen Shi time value and the cylinder temperature target value. The sliding parameter control can be automatically performed according to the target value of the cylinder temperature of the gas turbine and the limit value of the temperature drop rate of the cylinder temperature of the gas turbine, so that the accuracy and the reliability of the operation of the gas turbine set are improved, and meanwhile, the manual labor force can be greatly saved and the working efficiency can be improved because no manual duty is needed.
FIG. 2 is a flow chart illustrating another method of controlling a slip parameter turbine shutdown of a gas turbine unit according to an exemplary embodiment, as shown in FIG. 2, for controlling a rate of decrease in a main steam temperature of the gas turbine or/and controlling a rate of decrease in a load of the gas turbine according to a second operating parameter limit as described in step S14 above, comprising the steps of:
In step S141, according to the second operation parameter limit value, a steam temperature rate control is performed to control a rate of decrease in the main steam temperature of the turbine.
In step S142, load rate control is performed to control the rate of decrease in the load of the combustion engine in accordance with the second operation parameter limit value.
Optionally, the method further comprises:
And controlling the real-time value of the main steam temperature of the steam turbine according to the main steam temperature reducing water temperature reducing instruction.
And performing the control of the real-time value of the engine load through the engine load lowering command.
Optionally, rotor stress and main valve control modes can be monitored during control of the main steam temperature real-time value of the turbine and/or the load real-time value of the turbine. In one implementation, a TCS (turbine control system ) control system may be connected to a DCS (distributed control system) control system by OPC (OLE for Process Control) protocol or hard wire, to monitor the process of controlling the real-time value of the main steam temperature of the turbine or/and the real-time value of the load of the turbine; the gas-steam combined cycle unit can be controlled by a gas turbine/steam Turbine Control System (TCS) and an auxiliary machine to perform automatic control state feedback and early warning.
FIG. 3 is a flowchart illustrating another method for controlling a slip parameter of a gas turbine set according to an exemplary embodiment, as shown in FIG. 3, for controlling a steam temperature rate according to a second operation parameter limit value in the step S141, so as to control a rate of decrease of a main steam temperature of the gas turbine, including the steps of:
In step S1411, a cylinder temperature decrease rate real value, and a cylinder temperature difference real value in the cylinder temperature real value control are monitored.
In step S1412, the rate of decrease of the main steam temperature is controlled by freezing or releasing the main steam desuperheating water desuperheating instruction according to the real value of the steam cylinder temperature decrease rate, the real value of the main steam temperature difference and the second operation parameter limit.
For example, the temperature difference between the upper cylinder and the lower cylinder of the steam turbine, the main steam temperature falling rate, the steam cylinder temperature falling rate and the main steam temperature difference are taken as safety monitoring parameters of a slip parameter, in the slip parameter control process, the temperature falling rate limit value of the steam cylinder, the temperature falling rate limit value of the main steam, the temperature difference limit value of the main steam and the temperature difference limit value of the upper cylinder and the lower cylinder of the steam turbine are taken as important bases for releasing slip parameter instructions, when any real-time value of the parameter exceeds a corresponding limit value, the main steam temperature reducing and lowering instruction is considered to be frozen (HOLD) when the real-time value of the parameter exceeds a limit value, and when the real-time value of the parameter is within the limit value, the main steam temperature reducing and lowering instruction is released again (GO).
Optionally, based on automatic control reliability consideration, a human intervention function may be set, and when an unexpected event occurs (for example, when a significant deviation occurs in an actual parameter or a special working condition is required), human intervention is performed through on-site judgment, and the sliding parameter is stopped or restarted manually, so that the control is closer to the actual operation.
FIG. 4 is a flowchart illustrating another method for controlling a slip parameter of a gas turbine engine, as shown in FIG. 4, according to a second operating parameter limit, as described in step S142 above, for load rate control to control the rate of decrease of the load, comprising the steps of:
In step S1421, the actual value of the difference in the temperatures between the upper and lower cylinders of the turbine and the actual value of the rate of decrease in the turbine load are monitored.
In step S1422, according to the real-time value of the temperature difference between the upper cylinder and the lower cylinder of the steam turbine, the real-time value of the load descending rate of the fuel engine and the second operation parameter limit value, the descending rate of the load is controlled by freezing the load descending command of the fuel engine or releasing the load descending command of the fuel engine.
For example, the temperature difference between the upper cylinder and the lower cylinder of the gas turbine and the load drop rate of the gas turbine are taken as safety monitoring parameters of slip parameters, the limit value of the temperature drop rate of the gas turbine and the limit value of the load drop rate of the gas turbine are taken as important basis for releasing a slip parameter instruction in the slip parameter control process, when any real-time value of the parameter exceeds a corresponding limit value, the command for freezing (HOLD) the load of the gas turbine is considered to be frozen when the parameter exceeds the limit value, and when the parameter is restored within the limit value, the command for releasing (GO) the load of the gas turbine is re-released.
FIG. 5 is a flowchart of another method for controlling a slip parameter of a gas turbine set according to an exemplary embodiment, as shown in FIG. 5, the controlling of a real-time value of a main steam temperature of a gas turbine by a main steam desuperheating water desuperheating command in the step S17 includes the following steps:
in step S171, the steam temperature control fixed value is switched to the main steam desuperheat water temperature set value by the main steam desuperheat water temperature lowering instruction.
In step S172, the real-time value of the main steam temperature of the steam turbine is controlled to be reduced to the main steam desuperheating water temperature set value by the main steam desuperheating water PID according to the main steam desuperheating water temperature set value.
For example, the control of the main steam temperature real-time value of the steam turbine is classified into a main steam attemperation water PID (Proportional-Integral-differential) control, a constant value switching, and a rate control. The main steam temperature reducing water PID control, the set value switching and the rate control are based on the configuration mode of the control logic switching block, the set value switching is carried out according to the state of the unit and the step sequence instruction, the normal PID control is adopted during the normal operation of the unit, the sliding stop PID control is adopted when the unit enters the sliding stop state, and the real-time value of the main steam temperature of the steam turbine is controlled to be reduced to the set value of the main steam temperature reducing water.
Fig. 6 is a flowchart illustrating another method for controlling a slip parameter of a gas turbine set according to an exemplary embodiment, as shown in fig. 6, the control of the real-time value of the gas turbine load by the command for lowering the gas turbine load in step S18 described above includes the following steps:
In step S181, the load control fixed value is switched to the engine load set value by the engine load lowering command.
In step S182, the real-time value of the engine load is controlled to drop to the engine load set value by the engine load PID according to the engine load set value.
For example, the engine load real-time value control is classified into an engine load PID control, a constant value switching, and a rate control. And switching the fixed value according to the unit state and the step sequence instruction, and sending a control instruction to the fuel engine load PID to control the real-time value of the fuel engine load to drop to the set value of the fuel engine load.
Optionally, to prevent the temperature of the cylinder and the shaft system from rising and reducing the generated alternating stress in the sliding parameter process, the command is a unidirectional falling parameter command, and is realized by a 'locking subtracting' logic function block of the DCS (distributed control system).
When the real-time value of any parameter of the temperature drop rate of the cylinder, the temperature drop rate of the main steam of the cylinder, the temperature difference between the upper cylinder and the lower cylinder of the gas turbine, and the temperature difference of the main steam of the gas turbine exceeds the corresponding limit value, triggering a freezing (HOLD) instruction, and when the temperature drop rate of the cylinder, the temperature drop rate of the main steam of the gas turbine, the temperature difference between the upper cylinder and the lower cylinder of the gas turbine, and the temperature difference of the main steam of the gas turbine are restored within the limit value range, canceling the freezing instruction and triggering a release (GO) instruction. Wherein the freeze/release function may be implemented by a rate-fixed-value switching block in the logic.
In one implementation, the present disclosure considers the coupling process of unit load control and main steam attemperation water control to cylinder temperature regulation, both simultaneous control or fractional control by blocking condition monitoring and rate control differentiation, FIG. 7 is a flow chart illustrating a steam turbine main steam real-time value control and a gas turbine load real-time value control according to an exemplary embodiment, as shown in FIG. 7, only freezing the attemperation load command to freeze the load control when the steam turbine upper and lower cylinder temperature difference real-time value exceeds the steam turbine upper and lower cylinder temperature difference set-point or the gas turbine load drop rate real-time value exceeds the load drop rate set-point; when the real-time value of the main steam temperature falling rate exceeds the set value of the main steam temperature falling rate, freezing the load reducing and main steam temperature reducing water cooling instructions to freeze steam temperature control and load control; when the real-time value of the temperature decrease rate of the steam turbine cylinder exceeds the set value of the temperature decrease rate of the steam turbine cylinder or the real-time value of the temperature difference of the main steam exceeds the set value of the temperature difference of the main steam, only the main steam temperature reducing water cooling instruction is frozen to freeze the steam temperature control; when the real-time value of the temperature difference between the upper cylinder and the lower cylinder of the steam turbine, the real-time value of the load descending speed of the fuel engine, the real-time value of the main steam temperature descending speed, the real-time value of the temperature descending speed of the steam turbine and the real-time value of the temperature difference of the main steam do not exceed the corresponding limit values, the main steam temperature reducing water cooling instruction and the fuel engine load reducing instruction are released, and the real-time value control of the main steam temperature of the steam turbine and the real-time value control of the load of the fuel engine are carried out simultaneously.
The manual freezing and the main steam attemperation water PID and load PID control have been described above, and the method described in the embodiments of FIG. 3, FIG. 4 and FIG. 5 may be specifically referred to, and will not be described again.
Optionally, the third operating parameters include a high temperature zone operating parameter, a medium temperature zone operating parameter, and a low temperature zone operating parameter, and fig. 8 is a flow chart illustrating a slip parameter shutdown sequence control according to an exemplary embodiment, as shown in fig. 8, in which the slip parameter shutdown sequence control is performed in four phases for 6 steps, and the main valve of the turbine is controlled in an automatic mode during the slip parameter.
The first stage (step 1) is to prepare sliding parameters, wherein control instructions comprise unit sliding stop mode judgment, automatic steam turbine bypass and bypass attemperation water injection, standby interlocking injection of a steam turbine drain valve group, automatic main steam attemperation water injection, load setting and speed setting of a sliding parameter front-combustion engine, step sequence feedback comprises steam turbine bypass and attemperation water valve state inspection, circulating water pump and condensate pump running state inspection, steam turbine drain valve group interlocking state inspection and the like.
The second stage (steps 2, 3 and 4) is slip parameter control, wherein step 2 is high Wen Ouhua, step 3 is medium temperature zone slip parameter, and step 4 is low temperature zone slip parameter. The high Wen Ouhua parameter instruction comprises a gas engine load setting, a main steam temperature setting and the like, the slip parameter range is 20% of the standard section parameter (the difference between the operating parameter and the target parameter), and the step feedback comprises a gas engine upper and lower cylinder temperature difference check, a gas engine mismatch temperature (the main steam temperature is different from a preset reference cylinder temperature) check, a main steam temperature check and the like. The medium-temperature zone slip parameter instruction comprises a gas turbine load setting, a main steam temperature setting and the like, the slip parameter range is 20% of a standard section parameter (the difference between an operating parameter and a target parameter), and the step feedback comprises a gas turbine upper and lower cylinder temperature difference check, a gas turbine mismatch temperature (the main steam temperature is different from a preset reference cylinder temperature difference) check, a main steam temperature check, a gas turbine related valve state check and the like; the low-temperature region slip parameter instruction comprises a gas turbine load setting, a main steam temperature setting and the like, the slip parameter range is 60% of a standard section parameter (the difference between an operating parameter and a target parameter), and the step feedback comprises a gas turbine highest cylinder temperature check, a gas turbine related valve state check and the like.
The third stage (step 5) is to prepare before disconnection of the generator of the turbine, has no actual instruction, only detects the disconnection condition of the turbine, and mainly comprises state feedback check that the neutral point of the generator is grounded.
The fourth stage (step 6) is that the gas-steam combined cycle unit is shut down, the instructions comprise a fuel-down instruction, a fuel-less dragging protection combined gas turbine is triggered after the fuel is shut down, and step sequence feedback is that a fuel generator disconnection state is checked, a gas main valve state is checked, a gas rotation speed is reduced, and the like. After the unit is stopped, the main valve is detected to be in a closed state, the normal stop of the steam turbine is confirmed through the descending feedback of the rotating speed of the steam turbine, and otherwise, an alarm is sent.
The control of the main steam temperature real-time value and the control of the load real-time value of the combustion engine have been described above, and the method described in the embodiments of fig. 5 and 6 may be specifically referred to, and will not be repeated.
Through the technical scheme, the target value of the cylinder temperature of the steam turbine is set; setting a second operation parameter limit value, wherein the second operation parameter limit value is one or more of a steam turbine cylinder temperature falling rate limit value, a steam turbine main steam temperature falling rate limit value, a gas turbine load falling rate limit value, a steam turbine upper and lower cylinder temperature difference limit value and a steam turbine main steam temperature difference limit value; setting a steam-turbine main steam desuperheating water temperature set value and a gas turbine load set value; controlling the descending speed of the main steam temperature of the gas turbine or/and the descending speed of the load of the gas turbine according to the second operation parameter limit value so as to control the real-time value of the main steam temperature of the gas turbine to slide downwards towards the set value of the temperature of the main steam temperature-reducing water of the gas turbine and control the real-time value of the load of the gas turbine to slide downwards towards the set value of the load of the gas turbine; in the process of sliding down the main steam temperature real-time value and the fuel engine load real-time value, controlling the engine cylinder Wen Shi real-time value to slide down towards the engine cylinder temperature target value according to the limit value of the engine cylinder temperature descending speed; and stopping the steam turbine when the temperature of the steam turbine cylinder is determined to slide down according to the cylinder Wen Shi time value and the cylinder temperature target value. The sliding parameter control can be automatically performed according to the target value of the cylinder temperature of the gas turbine and the limit value of the temperature drop rate of the cylinder temperature of the gas turbine, so that the accuracy and the reliability of the operation of the gas turbine set are improved, and meanwhile, the manual labor force can be greatly saved and the working efficiency can be improved because no manual duty is needed.
FIG. 9 is a block diagram of a gas turbine sliding parameter turbine engine stop control apparatus according to an exemplary embodiment, as shown in FIG. 9, the gas turbine engine sliding parameter turbine engine stop control apparatus 900 includes: a first setting module 901, a second setting module 902, a third setting module 903, a first control module 904, a second control module 905, and a shutdown module 906.
The first setting module 901 is configured to set a cylinder temperature target value of the steam turbine.
The second setting module 902 is configured to set a second operation parameter limit, where the second operation parameter limit is one or more of a cylinder temperature drop rate limit, a main steam temperature drop rate limit, a load drop rate limit, a cylinder temperature difference limit, and a main steam temperature difference limit.
The third setting module 903 is configured to set a main steam attemperation temperature setting value and a load setting value of the gas turbine.
The first control module 904 is configured to control a rate of decrease of a main steam temperature of the turbine or/and a rate of decrease of a load of the combustion engine according to the second operation parameter limit value, so as to control a real-time value of the main steam temperature of the turbine to slide down towards a set value of the main steam desuperheating water temperature and to control a real-time value of the load of the combustion engine to slide down towards a set value of the load of the combustion engine.
The second control module 905 is configured to control the cylinder Wen Shi timing value to slide down towards the cylinder temperature target value according to the cylinder temperature drop rate limit in the process of sliding down the main steam temperature timing value and the load timing value.
The shutdown module 906 is configured to shutdown the steam turbine when it is determined that the cylinder temperature slip is complete based on the cylinder Wen Shi time value and the cylinder temperature target value.
Optionally, the apparatus further comprises a third control module 907 and a fourth control module 908.
The third control module 907 is used for controlling the real-time value of the main steam temperature of the steam turbine according to the main steam temperature reducing water temperature reducing instruction.
The fourth control module 908 is configured to perform a real-time value control of the engine load via a light engine load command.
Optionally, the first control module 904 includes a steam temperature rate control sub-module and a load rate control sub-module.
The steam temperature rate control sub-module is used for controlling the steam temperature rate according to the second operation parameter limit value so as to control the descending rate of the main steam temperature of the steam turbine.
The load rate control sub-module is used for controlling the load rate according to the second operation parameter limit value so as to control the falling rate of the load of the fuel engine.
Optionally, the steam temperature rate control submodule is configured to:
monitoring a real-time value of a temperature decrease rate of a cylinder in real-time value control of a main steam temperature of the steam turbine, the real-time value of the temperature decrease rate of the main steam of the steam turbine and a real-time value of a temperature difference of the main steam of the steam turbine;
And controlling the descending speed of the temperature of the main steam by freezing the main steam temperature-reducing water cooling instruction or releasing the main steam temperature-reducing water cooling instruction according to the real-time value of the temperature descending speed of the cylinder, the real-time value of the temperature descending speed of the main steam of the steam turbine, the real-time value of the temperature difference of the main steam of the steam turbine and the second operation parameter limit value.
The load rate control submodule is used for: monitoring a real-time value of a temperature difference between an upper cylinder and a lower cylinder of a gas turbine and a real-time value of a load reduction rate of the gas turbine in the control of the real-time value of the load of the gas turbine;
And controlling the descending speed of the load by freezing the descending fuel engine load instruction or releasing the descending fuel engine load instruction according to the real-time value of the temperature difference between the upper cylinder and the lower cylinder of the gas turbine, the real-time value of the descending speed of the fuel engine load and the second operation parameter limit value.
Optionally, the third control module 907 is configured to:
switching the steam temperature control constant value to a main steam temperature reducing water temperature set value through a main steam temperature reducing water temperature reducing instruction;
And controlling the real-time value of the main steam temperature of the steam turbine to be reduced to the set value of the main steam temperature by the PID of the main steam temperature.
Optionally, the fourth control module 908 is configured to:
switching the load control fixed value into a fuel engine load set value through a fuel engine load lowering instruction;
And controlling the real-time value of the engine load to drop to the set value of the engine load according to the set value of the engine load through the PID of the engine load.
Optionally, the apparatus 900 further comprises a preparation module 909 before the slip parameter control, the preparation module 909 being configured to:
And (3) preparing sliding parameters, wherein the sliding parameters comprise one or more of unit sliding stop mode judgment, automatic steam turbine bypass and bypass attemperation water throwing, standby interlocking throwing of a steam turbine drain valve group, automatic main steam attemperation water throwing, checking of steam turbine bypass and attemperation water valve states, running states of a circulating water pump and a condensate pump and interlocking states of the steam turbine drain valve group.
Optionally, the shutdown module 906 is configured to:
When the temperature sliding of the steam turbine cylinder is finished, detecting a steam turbine disconnection state, wherein the steam turbine disconnection state comprises a state that a neutral point of a generator is grounded;
According to the gas turbine disconnection state and the gas turbine disconnection state, stopping the gas turbine through a gas turbine stopping instruction;
After the gas engine is stopped, the gas engine is stopped by triggering the non-gas engine to drag the protection linkage gas engine.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
Through the technical scheme, the target value of the cylinder temperature of the steam turbine is set; setting a second operation parameter limit value, wherein the second operation parameter limit value is one or more of a steam turbine cylinder temperature falling rate limit value, a steam turbine main steam temperature falling rate limit value, a gas turbine load falling rate limit value, a steam turbine upper and lower cylinder temperature difference limit value and a steam turbine main steam temperature difference limit value; setting a steam-turbine main steam desuperheating water temperature set value and a gas turbine load set value; controlling the descending speed of the main steam temperature of the gas turbine or/and the descending speed of the load of the gas turbine according to the second operation parameter limit value so as to control the real-time value of the main steam temperature of the gas turbine to slide downwards towards the set value of the temperature of the main steam temperature-reducing water of the gas turbine and control the real-time value of the load of the gas turbine to slide downwards towards the set value of the load of the gas turbine; in the process of sliding down the main steam temperature real-time value and the fuel engine load real-time value, controlling the engine cylinder Wen Shi real-time value to slide down towards the engine cylinder temperature target value according to the limit value of the engine cylinder temperature descending speed; and stopping the steam turbine when the temperature of the steam turbine cylinder is determined to slide down according to the cylinder Wen Shi time value and the cylinder temperature target value. The sliding parameter control can be automatically performed according to the target value of the cylinder temperature of the gas turbine and the limit value of the temperature drop rate of the cylinder temperature of the gas turbine, so that the accuracy and the reliability of the operation of the gas turbine set are improved, and meanwhile, the manual labor force can be greatly saved and the working efficiency can be improved because no manual duty is needed.
Fig. 10 is a block diagram of an electronic device 1000, shown in accordance with an exemplary embodiment. As shown in fig. 10, the electronic device 1000 may include: a processor 1001, and a memory 1002. The electronic device 1000 may also include one or more of a multimedia component 1003, an input/output (I/O) interface 1004, and a communication component 1005.
The processor 1001 is configured to control the overall operation of the electronic device 1000, so as to complete all or part of the steps in the above-mentioned gas turbine sliding parameter steam turbine control method. The memory 1002 is used to store various types of data to support operation at the electronic device 1000, which may include, for example, instructions for any application or method operating on the electronic device 1000, as well as application-related data, such as contact data, transceived messages, pictures, audio, video, and the like. The Memory 1002 may be implemented by any type or combination of volatile or non-volatile Memory devices, such as static random access Memory (Static Random Access Memory, SRAM for short), electrically erasable programmable Read-Only Memory (ELECTRICALLY ERASABLE PROGRAMMABLE READ-Only Memory, EEPROM for short), erasable programmable Read-Only Memory (Erasable Programmable Read-Only Memory, EPROM for short), programmable Read-Only Memory (Programmable Read-Only Memory, PROM for short), read-Only Memory (ROM for short), magnetic Memory, flash Memory, magnetic disk, or optical disk. The multimedia component 1003 may include a screen and audio components. Wherein the screen may be, for example, a touch screen, the audio component being for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in the memory 1002 or transmitted through the communication component 1005. The audio assembly further comprises at least one speaker for outputting audio signals. The I/O interface 1004 provides an interface between the processor 1001 and other interface modules, which may be a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 1005 is used for wired or wireless communication between the electronic device 1000 and other devices. Wireless Communication, such as Wi-Fi, bluetooth, near Field Communication (NFC) for short, 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or one or a combination of more of them, is not limited herein. The corresponding communication component 1005 may thus comprise: wi-Fi module, bluetooth module, NFC module, etc.
In an exemplary embodiment, the electronic device 1000 may be implemented by one or more Application-specific integrated circuits (ASIC), digital signal Processor (DIGITAL SIGNAL Processor, DSP), digital signal processing device (DIGITAL SIGNAL Processing Device, DSPD), programmable logic device (Programmable Logic Device, PLD), field programmable gate array (Field Programmable GATE ARRAY, FPGA), controller, microcontroller, microprocessor, or other electronic components for executing the above-described gas turbine engine slip parameter steam stop control method.
In another exemplary embodiment, a computer readable storage medium is also provided, comprising program instructions which, when executed by a processor, implement the steps of the gas turbine set slip parameter steam stop control method described above. For example, the computer readable storage medium may be the memory 1002 including program instructions described above that are executable by the processor 1001 of the electronic device 1000 to perform the gas turbine engine slip parameter steam stop control method described above.
In another exemplary embodiment, a computer program product is also provided, comprising a computer program executable by a programmable apparatus, the computer program having code portions for performing the above-described gas turbine set slip parameter steam stop control method when executed by the programmable apparatus.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (12)
1. A gas turbine unit slip parameter steam stop control method, the method comprising:
Setting a cylinder temperature target value of the steam turbine;
Setting a second operation parameter limit value, wherein the second operation parameter limit value is one or more of a steam turbine cylinder temperature falling rate limit value, a steam turbine main steam temperature falling rate limit value, a gas turbine load falling rate limit value, a steam turbine upper and lower cylinder temperature difference limit value and a steam turbine main steam temperature difference limit value;
setting a steam-turbine main steam desuperheating water temperature set value and a gas turbine load set value;
Controlling the descending speed of the main steam temperature of the steam turbine or/and the descending speed of the load of the fuel engine according to the second operation parameter limit value so as to control the real-time value of the main steam temperature of the steam turbine to slide downwards towards the set value of the temperature reduction water temperature of the main steam of the steam turbine and control the real-time value of the load of the fuel engine to slide downwards towards the set value of the load of the fuel engine;
Controlling a cylinder Wen Shi time value to slide downwards towards the cylinder temperature target value according to the cylinder temperature reduction rate limit value in the process of sliding the main steam temperature real-time value and the load real-time value of the gas turbine;
and stopping the steam turbine when the completion of the downward sliding of the steam turbine cylinder temperature is determined according to the steam turbine cylinder Wen Shi time value and the steam turbine cylinder temperature target value.
2. The method according to claim 1, wherein the method further comprises:
performing real-time value control on the main steam temperature of the steam turbine through a main steam temperature reducing water temperature reducing instruction;
And performing the control of the real-time value of the engine load through the engine load lowering command.
3. The method according to claim 1, wherein controlling the rate of decrease of the main steam temperature of the turbine or/and controlling the rate of decrease of the load of the combustion engine in accordance with the second operating parameter limit comprises:
according to the second operation parameter limit value, controlling the steam temperature rate to control the descending rate of the main steam temperature of the steam turbine;
and according to the second operation parameter limit value, carrying out load rate control to control the dropping rate of the load of the fuel engine.
4. A method according to claim 3, wherein said controlling the steam temperature rate to control the rate of decrease of the main steam temperature of the steam turbine in accordance with said second operating parameter limit comprises:
monitoring a real-time value of a temperature decrease rate of a cylinder in real-time value control of a main steam temperature of the steam turbine, the real-time value of the temperature decrease rate of the main steam of the steam turbine and a real-time value of a temperature difference of the main steam of the steam turbine;
And controlling the descending speed of the temperature of the main steam by freezing the main steam temperature-reducing water cooling instruction or releasing the main steam temperature-reducing water cooling instruction according to the real-time value of the temperature descending speed of the cylinder, the real-time value of the temperature descending speed of the main steam of the steam turbine, the real-time value of the temperature difference of the main steam of the steam turbine and the second operation parameter limit value.
5. A method according to claim 3, wherein said load rate control to control the rate of decrease of said load in accordance with said second operating parameter limit comprises:
Monitoring a real-time value of a temperature difference between an upper cylinder and a lower cylinder of a gas turbine and a real-time value of a load reduction rate of the gas turbine in the control of the real-time value of the load of the gas turbine;
And controlling the descending speed of the load by freezing the descending fuel engine load instruction or releasing the descending fuel engine load instruction according to the real-time value of the temperature difference between the upper cylinder and the lower cylinder of the steam turbine, the real-time value of the descending speed of the fuel engine load and the second operation parameter limit value.
6. The method of claim 2, wherein the controlling the real-time value of the main steam temperature of the steam turbine by the main steam desuperheating water cooling command comprises:
switching the steam temperature control fixed value to the main steam temperature reducing water temperature set value through the main steam temperature reducing water temperature reducing instruction;
And controlling the real-time value of the main steam temperature of the steam turbine to be reduced to the main steam temperature setting value through the main steam temperature reducing PID according to the main steam temperature setting value.
7. The method of claim 2, wherein said engine load real time value control by a light engine load command comprises:
switching a load control fixed value to the gas turbine load set value through the gas turbine load lowering instruction;
And controlling the real-time value of the fuel engine load to drop to the fuel engine load set value through the fuel engine load PID according to the fuel engine load set value.
8. The method of claim 1, further comprising, prior to the slip parameter control:
and performing sliding parameter preparation, wherein the sliding parameter preparation comprises one or more of unit sliding stop mode judgment, automatic steam turbine bypass and bypass attemperation water injection, standby interlocking input of a steam turbine drain valve group, automatic main steam attemperation water injection, check of steam turbine bypass and attemperation water valve states, circulating water pump and condensate pump running states and steam turbine drain valve group interlocking states.
9. The method of claim 1, wherein said deactivating the steam turbine upon determining that the cylinder temperature slip is complete based on the cylinder Wen Shi value and the cylinder temperature target value comprises:
Detecting the disconnection state of the steam turbine when the temperature of the steam turbine cylinder is complete, wherein the disconnection state of the steam turbine comprises a state that a neutral point of a generator is grounded;
According to the gas turbine disconnection state and the gas turbine disconnection state, stopping the gas turbine through a gas turbine stopping instruction;
And after the gas engine is stopped, the gas engine is stopped by triggering the non-gas engine to drag and protect the gas engine.
10. A gas turbine unit slip parameter steam stop control device, the device comprising:
the first setting module is used for setting a cylinder temperature target value of the steam turbine;
The second setting module is used for setting a second operation parameter limit value, wherein the second operation parameter limit value is one or more of a steam turbine cylinder temperature falling speed limit value, a steam turbine main steam temperature falling speed limit value, a gas turbine load falling speed limit value, a steam turbine upper and lower cylinder temperature difference limit value and a steam turbine main steam temperature difference limit value;
The third setting module is used for setting a temperature set value of the main steam desuperheating water of the steam turbine and a load set value of the gas turbine;
The first control module is used for controlling the falling rate of the main steam temperature of the gas turbine or/and the falling rate of the load of the gas turbine according to the second operation parameter limit value so as to control the real-time value of the main steam temperature of the gas turbine to slide downwards towards the set value of the main steam temperature reduction water temperature and control the real-time value of the load of the gas turbine to slide downwards towards the set value of the load of the gas turbine;
and the second control module is used for controlling the cylinder Wen Shi time value to slide downwards towards the cylinder temperature target value according to the cylinder temperature reduction rate limit value in the process of sliding the main steam temperature real-time value and the load real-time value of the gas turbine.
And the shutdown module is used for shutting down the steam turbine when the temperature of the steam turbine cylinder is determined to be complete according to the cylinder Wen Shi time value and the cylinder temperature target value.
11. A non-transitory computer readable storage medium having stored thereon a computer program, characterized in that the program when executed by a processor implements the steps of the method of any of claims 1-9.
12. An electronic device, comprising:
A memory having a computer program stored thereon;
A processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 1-9.
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| CN202410523638.7A CN118423140A (en) | 2024-04-28 | 2024-04-28 | Method and device for controlling sliding parameter steam stop machine of gas turbine set, storage medium and equipment |
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| CN202410523638.7A CN118423140A (en) | 2024-04-28 | 2024-04-28 | Method and device for controlling sliding parameter steam stop machine of gas turbine set, storage medium and equipment |
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