CN216951104U - Fault early warning system for EH oil pump adjusting module of steam turbine - Google Patents
Fault early warning system for EH oil pump adjusting module of steam turbine Download PDFInfo
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Abstract
The utility model discloses a fault early warning system of an EH oil pump adjusting module of a steam turbine and a control method thereof, belonging to the technical field of EH oil pump adjusting fault early warning; the technical problem to be solved is as follows: the improvement of the hardware structure of the steam turbine EH oil pump adjusting module fault early warning system is provided; the technical scheme for solving the technical problems is as follows: the method comprises a subtracter module, an absolute value module, a large value selection module, a small value selection module, a time delay opening module and a phase module, wherein EH oil pump operation, EH oil pump working current, EH oil pump main pipe oil pressure, EH oil tank liquid level and EH oil tank oil temperature are used as judgment basis for EH oil pump adjusting module fault early warning control, fault early warning of the EH oil pump adjusting module is sent out in advance through logic judgment, and operators can obtain early warning information in time so as to find out the real reason of oil leakage, which is caused by the fault of the EH oil pump adjusting module and needs to be switched to a standby pump immediately for operation; the utility model is applied to steam turbines.
Description
Technical Field
The utility model discloses a fault early warning system for an EH oil pump adjusting module of a turbine, and belongs to the technical field of thermal control of EH oil systems of turbines.
Background
When the unit is in the operation process, a fault of a certain system suddenly occurs, and further severe events are caused. For example, when an EH (Hydraulic control system in chinese and Electro Hydraulic in english) oil system has oil leakage and other faults, the problems of sudden change of oil temperature TT of an EH oil tank, abnormal operation of an oil pump and the like can occur, which can lead to unplanned shutdown of a unit in serious cases, and how to prevent sudden malignant events becomes an important precondition for improving the operation safety of the unit system. Operators usually rely on the prompt of the photon board to find system faults, but the judgment basis of each photon board is single, so that the prompt of the photon board is frequently mistakenly reported and missed reported, the operators cannot efficiently monitor the machine set pictures, and the safe operation of the machine set is seriously threatened. The early warning of the EH oil system is established, accurate early warning information is sent out according to various judgment bases, and the sent early warning information is more specific to the reasons of the faults of the EH oil system. Therefore, the method can effectively prevent false alarm, missing report and other error information of the photon plate, plays an important role in the safety of the whole EH oil system,
in normal operation of the unit, an operator usually has difficulty in finding out fluctuation changes of the EH oil current and the EH oil header oil pressure in advance, and only the EH oil current and the EH oil header oil pressure change when the EH oil level and the EH oil tank oil temperature are within a normal range with the passage of time. This is often the case because the pump regulation module fails, resulting in a problem with the pump output.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model aims to solve the technical problems that: the improvement of the hardware structure of the fault early warning system of the EH oil pump adjusting module of the steam turbine is provided.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: a fault early warning system for an EH oil pump adjusting module of a steam turbine comprises an EH oil system, an acquisition module, a DCS controller and an output display screen, the DCS controller is respectively connected with an acquisition module and an output display screen through leads, the acquisition module comprises a temperature sensor, a liquid level sensor, a pressure sensor and a current sensor, wherein a plurality of temperature sensors, a plurality of liquid level sensors, a plurality of pressure sensors and a plurality of current sensors are arranged, the temperature sensors are arranged in an EH oil tank to collect the oil temperature Tt of the EH oil tank, the liquid level sensors are arranged in the EH oil tank to collect the liquid level Ll of the EH oil tank, the pressure sensors are arranged on a main pipe of an EH oil pump to collect the oil pressure Pp of the main pipe of the EH oil pump, the current sensors are arranged on the EH oil pump to collect the working current Ii of the EH oil pump, the DCS controller is also connected with the control end of the EH oil pump through a wire to acquire an EH oil pump operation signal C;
a first judgment module, a second judgment module, a third judgment module, a fourth judgment module, a first phase and module, a second phase and module and an early warning result output module are arranged in the DCS controller;
the DCS controller respectively calculates the acquired oil temperature Tt of a plurality of EH oil tanks, the liquid level Ll of the EH oil tanks, the oil pressure Pp of an EH oil pump main pipe and the working current Ii of the EH oil pumps to obtain the average oil temperature Ta of the EH oil tanks, the average liquid level La of the EH oil tanks, the average oil pressure Pa of the EH oil pumps and the average working current Ia of the EH oil pumps, outputting a first judgment result by a first judgment module for the EH oil tank temperature Tt and the EH oil tank average oil temperature Ta, outputting a second judgment result by a second judgment module for the EH oil tank liquid level Ll and the EH oil tank average liquid level La, outputting a third judgment result by a third judgment module for the EH oil pump main pipe oil pressure Pp and the EH oil pump average main pipe oil pressure Pa, outputting a fourth judgment result by a fourth judgment module for the EH oil pump working current Ii and the EH oil pump average working current, and taking the third judgment result and the EH oil pump operation signal C as the input of a first phase module and the output result as a fifth judgment result;
and inputting the first judgment result, the second judgment result, the fourth judgment result and the fifth judgment result into the delay opening module after passing through the second phase module, finally inputting the judgment result into the early warning result output module, and sending the judgment result to the output display screen through the early warning result output module.
The first judgment module comprises a first subtracter module, a first absolute value module and a first selected small value module, the EH oil tank temperature Tt and the EH oil tank average oil temperature Ta are used as input ends of the first subtracter module, an output end of the first subtracter module is connected with an input end of the first insulation value module, an output end of the first insulation value module is connected with an input end of the first selected small value module, the input end of the first selected small value module is further connected with a first fixed value input end, and an output end of the first selected small value module is connected with an input end of the second phase and the module.
The second judgment module comprises a second subtracter module, a second absolute value module and a second small value selection module, the EH mailbox liquid level Ll and the EH mailbox average liquid level La are used as input ends of the second subtracter module, an output end of the second subtracter module is connected with an input end of the second absolute value module, an output end of the second absolute value module is connected with an input end of the second small value selection module, an input end of the second small value selection module is further connected with a second fixed value input end, and an output end of the second small value selection module is connected with an input end of the second phase and the module.
The third judgment module comprises a third subtracter module, a third absolute value module and a first selected large value module, the EH oil pump main pipe oil pressure Pp and the EH oil pump average oil pump main pipe oil pressure Pa are used as input ends of the third subtracter module, an output end of the third subtracter module is connected with an input end of the third absolute value module, an output end of the third absolute value module is connected with an input end of the first selected large value module, the input end of the first selected large value module is further connected with a third fixed value input end, an output end of the first selected large value module is connected with one input end of the first phase and module, the other input end of the first phase and module is connected with an EH oil pump operation signal C, and an output end of the first phase and module is connected with an input end of the second phase and module.
The fourth judgment module comprises a fourth subtracter module, a fourth absolute value module and a second maximum value selection module, the working current Ii of the EH oil pump and the average working current Ia of the EH oil pump are used as the input end of the fourth subtracter module, the output end of the fourth subtracter module is connected with the input end of the fourth absolute value module, the output end of the fourth absolute value module is connected with the input end of the second maximum value selection module, the input end of the second maximum value selection module is further connected with a fourth fixed value input end, and the output end of the second maximum value selection module is connected with the input end of the second phase and the input end of the module.
The DCS controller is a DCS controller with the model number of NT 6000.
Compared with the prior art, the utility model has the beneficial effects that: the fault early warning system for the EH oil pump regulating module of the steam turbine provided by the utility model replaces the original prompt of a photon board by the efficient early warning prompt, reduces the false alarm and the false alarm, enables an operator to monitor the running unit more efficiently, informs the operator of the accurate early warning prompt, timely switches the standby pump to process the fault oil pump if the leakage is caused by the fault of the EH oil pump regulating module, and avoids the further malignant event caused by the misoperation or delayed processing.
The utility model can early warn the fault of the EH oil pump adjusting module in advance in the running process of the EH oil system and improve the running safety performance of the unit system.
According to the utility model, the fault early warning of the EH oil pump adjusting module is sent out in advance through logic judgment, and the operator can obtain the early warning information in time, so that the real reason of oil leakage is found out, which is caused by the fault of the EH oil pump adjusting module and needs to be switched to the standby pump to operate immediately.
Drawings
The utility model is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic structural view of the present invention;
in the figure: the system comprises a first subtractor module 1, a first absolute value module 2, a first selected small value module 3, a second subtractor module 4, a second absolute value module 5, a second selected small value module 6, a third subtractor module 7, a third absolute value module 8, a first selected large value module 9, a first AND module 10, a fourth subtractor module 11, a fourth absolute value module 12, a second selected large value module 13, a second AND module 14, a delay ON module 15, an early warning result output module 16, a first fixed value input end 17, a second fixed value input end 18, a third fixed value input end 19, a fourth fixed value input end 20 and a fifth fixed value input end 21.
Detailed Description
As shown in fig. 1, the fault early warning system for the EH oil pump regulating module of the steam turbine provided by the utility model comprises;
1) an AI block for collecting the oil temperature Tt of an EH oil tank of the module and an AI for collecting the average oil temperature Ta of the EH oil tank are both used as the input end of a first subtracter module 1 and are connected with the first subtracter module 1, the output end of the first subtracter module 1 is connected with the input end of a first absolute value module 2, the output end of the first absolute value module 2 and a first constant value input end 17 of a first minifying value module 3 are both used as the input end of the first minifying value module 3 and are connected with the first minifying value module 3, and the output end of the first minifying value module 3 is connected with the input end of a second phase and module 14;
2) the AI block of the liquid level Ll of the collection module EH tank and the AI block of the average liquid level La of the EH tank are both used as input ends of a second subtractor module 4 and are connected with the second subtractor module 4, the output end of the second subtractor module 4 is connected with the input end of a second absolute value module 5, the output end of the second absolute value module 5 and a second constant value input end 18 of a second selected small value module 6 are both used as input ends of the second selected small value module 6 and are connected, and the output end of the second selected small value module 6 is used as an input end of a second phase and module 14 and is connected with the second phase and module 14;
3) an AI block for collecting a module EH oil pump main pipe oil pressure Pp and an AI block for EH oil pump average main pipe oil pressure Pa are used as input ends of a third subtractor module 7 and are connected with the third subtractor module 7, an output end of the third subtractor module 7 is connected with an input end of a third absolute value module 8, an output end of the third absolute value module 8 and a third fixed value input end 19 of a first large value selection module 9 are both used as input ends of the first large value selection module 9 and are connected, an output end of the first large value selection module 9 and an operation signal C of the collecting module EH oil pump are both used as input ends of a first phase and module 10 and are connected with the first phase and module 10, and an output end of the first phase and module 10 is used as an input end of a second phase and module 14 and is connected with the second phase and module 14;
4) the AI block of the EH oil pump operating current Ii and the AI block of the EH oil pump average operating current Ia of the acquisition module are used as input terminals of a fourth subtractor module 11 and are connected to the fourth subtractor module 11, the output terminal of the fourth subtractor module 11 is connected to the input terminal of a fourth absolute value module 12, the output terminal of the fourth absolute value module 12 and a fourth constant value input terminal 20 of a second maximum value module 13 are both used as input terminals of the second maximum value module 13 and are connected, and the output terminal of the second maximum value module 13 is used as an input terminal of a second phase and module 14 and is connected to the second phase and module 14;
5) the constant values of the output end of the second phase and module 14 and the fifth constant value input end 21 of the delay opening module 15 are both used as the input end of the delay opening module 15, the output end of the delay opening module 15 is connected with the early warning result output module 16 of the final early warning, and according to the above conditions: EH oil pump operation, EH oil pump electric current, EH oil pump oil pressure, EH oil pump oil level and EH oil tank oil temperature TT come the basis of EH oil pump adjusting module trouble early warning criterion.
The early warning function of each module is realized based on a DCS controller of Keyuan NT6000, and the specific model and the function of each module are as follows:
a subtractor module: the module is numbered SUB08786, the parameter name IN1 IN the module is the first input value to the module, the parameter name IN2 IN the module is the second input value to the module, and the parameter name OUT IN the module is the output of the module. The main function of this module is to calculate the difference between IN1 and IN2 and output it.
An absolute value module: the module number is ANS18601, the parameter name IN IN the module is the input of the module, and the parameter name OUT IN the module is the output of the module. The module has the main function of solving the absolute value of the analog quantity input and outputting.
A big value selecting module: the module number is CMP07071, the parameter name PV1 in the module is the first input value of the module, the parameter name PV2 in the module is the second input value of the module, the parameter name MODE in the module is the comparison MODE, the MODE is set to the large value selection MODE, and the parameter name OUT in the module is the output of the module. The main function of this module is to compare PV1 with PV2 and output the comparison result.
A small value selecting module: the module number is CMP07071, the parameter name PV1 in the module is the first input value of the module, the parameter name PV2 in the module is the second input value of the module, the parameter name MODE in the module is the comparison MODE, the MODE is set to the selected value MODE, and the parameter name OUT in the module is the output of the module. The main function of this module is to compare PV1 with PV2 and output the comparison result.
And a phase module: the module number is AND426815, the parameter name IN1 IN the module is the first input value of the module, the parameter name IN2 IN the module is the second input value of the module, the parameter name IN3 IN the module is the third input value of the module, the parameter name IN4 IN the module is the fourth input value of the module, AND the parameter name OUT IN the module is the output of the module. The module has the main function of carrying out AND operation on four switching value inputs.
And (3) delayed block opening: the module is numbered as TON13743, the parameter name IN IN the module is the input of the module, the parameter name TIM IN the module is the delay time of the module, the parameter name OUT IN the module is the output of the module, and the module has the main function of delaying TIM for a millisecond and outputting an on signal.
The utility model discloses a control method of a fault early warning system of an EH oil pump adjusting module of a steam turbine, which comprises the following steps;
collecting the oil temperature Tt of an EH oil tank and the average oil temperature Ta of the EH oil tank as input ends of a first subtracter module 1 and connecting the two input ends, subtracting the values of the two input ends of the first subtracter module 1, calculating a numerical value as an input end of a first absolute value module 2, calculating an absolute value of data by using the first absolute value module 2, using an output end of the first absolute value module 2 as an input end of a first selected small value module 3, comparing the numerical value with a constant value of a first fixed value input end 17 set by the first selected small value module 3 to obtain a small selected value, using the value of an output end of the first selected small value module 3 to indicate that the variation fluctuation of the oil temperature is within 2 ℃, using the output end of the first selected small value module 3 as 1 as an input end of a second phase and module 14, and using the output end of the first selected small value module 3 as 0 not as an input end of the second phase and module 14, wherein the control logic indicates whether the variation of the oil temperature TT of the EH oil tank is fluctuated by the EH oil tank, thereby affecting the internal leakage of the EH oil system;
collecting the EH tank liquid level Ll and the EH tank average liquid level La as input ends of a second subtractor module 4 and connecting the two input ends, subtracting the values of the two input ends of the second subtractor module 4, using the calculated numerical value as an input end of a second absolute value module 5, using the second absolute value module 5 to calculate the absolute value of data, using the output end of the second absolute value module 5 as an input end of a second selected small value module 6, and carrying out small selection comparison with a constant of a second fixed value input end 18 set by the second selected small value module 6 to indicate that the fluctuation change of the EH tank liquid level is within 5mm, when the fluctuation change of the EH tank liquid level judged by the second selected small value module 6 is 5mm, using the output end of the second selected small value module 6 as an input end of a second phase and module 14, when the output end of the second selected small value module 6 is 0, not using the output end of the second phase and module 14, and the control logic indicates whether the fluctuation change of the EH tank liquid level is changed by the fluctuation of the EH tank liquid level, thereby affecting the internal leakage of the EH oil system;
collecting EH oil pump main pipe oil pressure Pp and EH oil pump main pipe average oil pressure Pa as input ends of a third subtracter module 7, connecting the input ends of the third subtracter module 7 and the third subtracter module 7 to calculate a difference value, using the difference value calculated by the third subtracter module 7 as an input end of a third absolute value module 8, using the third absolute value module 8 to calculate an absolute value of data, using an output end of the third absolute value module 8 as an input end of a first selected value module 9, and comparing the absolute value with a constant of a third fixed value input end 19 set by the first selected value module 9 to make a large selection, wherein the fluctuation change of the EH main pipe oil pressure is not within 2MPa, when the fluctuation change of the EH main pipe oil pressure determined by the first selected value module 9 is not within 2MPa, and when the EH oil pump operates, the output end is 1, and the input end of a second phase and module 14, when the fluctuation change of the EH main pipe oil pressure determined by the first selected value module 9 is within 2MPa, or when the EH oil pump does not operate, the output end is 0 and is not used as the input end of the second phase and the module 14, and the control logic indicates whether the change of the oil pressure of the EH main pipe is caused or not, so that the internal leakage of the EH oil system is influenced;
the collected EH oil pump working current Ii and the EH oil pump average working current Ia are both used as the input ends of a fourth subtractor module 11 and are connected, a difference value is calculated by the fourth subtractor module 11, the output end of the fourth subtractor module 11 is used as the input end of a fourth absolute value module 12 and is connected, the absolute value of data is calculated by a fourth absolute value module 12, the output end of the fourth absolute value module 12 is used as the input end of a second selected value module 13 and is connected, and the output end of the fourth absolute value module 12 is compared with a constant of a fourth fixed value input end 20 set by the second selected value module 13 in a small selection mode, so that the fluctuation change of the EH oil current is not within 2A, when the fluctuation change of the EH oil current determined by the second selected value module 13 is not within 2A, the output end of the EH oil current is 1, the output end of the second phase and module 14 is used as the input end of the second phase and module 14, when the output end of the second selected value module 13 is 0, the output end of the second phase and module 14 are not used as the input end of the second phase and module 14, the control logic indicates whether the change of the current of the EH oil pump affects the internal leakage of the oil system;
the output end of the first small value selecting module 3, the output end of the second small value selecting module 6, the output end of the first phase and module 10 and the output end of the second large value selecting module 13 are used as the input end of a second phase and module 14 and are connected with the second phase and module 14, when the output end of the second phase and module 14 is 1, the output end of the second phase and module 14 is connected with the input end of the delay opening module 15, the delay opening module 15 is a delay block and has a reset function within 2min, and when the output end of the second phase and module 14 is 1 and is within 2min, the output end of the delay switch module 15 is 1, and when the output end of the second phase and module 14 is not 1 or exceeds 2min, the output end of the delay opening module 15 is 0, when the output end of the delay opening module 15 is 1, the early warning pushing is simultaneously satisfied, and pushing the fault of the EH oil pump adjusting module according to the logic judgment, and switching to the operation of a standby pump.
The control logic may warn of EH oil leakage that causes a failure in the EH oil pump regulation module.
The condition according to which the fault early warning criterion of the EH oil pump adjusting module is determined comprises the following steps: the system comprises EH oil pump operation, EH oil pump working current, EH oil pump main pipe oil pressure, EH oil pump liquid level and EH oil tank oil temperature.
The control logic can be put into after all test conditions are met, and early warning of abnormal operation and leakage of the EH oil system of the steam turbine can be carried out after the control logic is put into operation.
The control logic sets the oil temperature of the EH oil tank to Tt and the average oil temperature of the EH oil tank to Ta.
The control logic sets the liquid level of the EH oil tank to be Ll and the average liquid level of the EH oil tank to be La.
The control logic sets the oil pressure of an EH oil pump main pipe to be Pp, and the oil pressure of an EH oil pump flattening average main pipe to be Pa.
The control logic sets the operation of the EH oil pump as C.
The control logic sets the working current of the EH oil pump as Ii and the average working current of the EH oil pump as Ia.
The judgment condition of the EH oil pump adjusting module fault early warning in the control logic comprises the following steps: the difference value of the EH oil tank oil temperature and the EH oil tank average oil temperature needs to be within a normal range, the difference value of the EH oil tank liquid level and the EH oil tank average liquid level needs to be within a normal range, the difference value of the EH oil pump main pipe oil pressure and the EH oil pump average main pipe oil pressure is not within a normal range, the difference value of the EH oil pump working current and the EH oil pump average working current is not within a normal range, and the EH oil pump regulating module fault can be predicted only if all conditions in the control logic are met.
It should be noted that, regarding the specific structure of the present invention, the connection relationship between the modules of each component adopted in the present invention is determined and can be achieved, except for the specific description in the embodiment, the specific connection relationship can bring corresponding technical effects, and the technical problem proposed by the present invention is solved on the premise of not depending on the execution of corresponding software programs, the types and connection manners of the components, modules and specific components in the present invention, except for the specific description, all belong to the prior art such as published patents, published papers and periodicals, or common general knowledge that can be acquired by the technicians in the field before the application date, and no description is needed, so that the technical solution provided by the present application is clear, complete and achievable, and the corresponding entity product can be reproduced or obtained according to the technical means.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The utility model provides a steam turbine EH oil pump adjusting module trouble early warning system, includes EH oil system, its characterized in that: the system comprises an EH oil pump, a DCS controller and an output display screen, wherein the DCS controller is connected with the acquisition module and the output display screen through leads respectively, the acquisition module comprises a temperature sensor, a liquid level sensor, a pressure sensor and a current sensor, wherein the temperature sensor, the liquid level sensor, the pressure sensor and the current sensor are arranged in a plurality of groups, the temperature sensor is arranged in the EH oil tank to acquire the oil temperature Tt of the EH oil tank, the liquid level sensor is arranged in the EH oil tank to acquire the liquid level Ll of the EH oil tank, the pressure sensor is arranged on a main pipe of the EH oil pump to acquire the oil pressure Pp of the main pipe of the EH oil pump, the current sensor is arranged on the EH oil pump to acquire the working current Ii of the EH oil pump, and the DCS controller is also connected with the control end of the EH oil pump through leads to acquire the running signal C of the EH oil pump;
a first judgment module, a second judgment module, a third judgment module, a fourth judgment module, a first phase and module, a second phase and module and an early warning result output module are arranged in the DCS controller;
the DCS controller respectively calculates the acquired oil temperature Tt of a plurality of EH oil tanks, the liquid level Ll of the EH oil tanks, the oil pressure Pp of an EH oil pump main pipe and the working current Ii of the EH oil pumps to obtain the average oil temperature Ta of the EH oil tanks, the average liquid level La of the EH oil tanks, the average oil pressure Pa of the EH oil pumps and the average working current Ia of the EH oil pumps, outputting a first judgment result by a first judgment module for the EH oil tank temperature Tt and the EH oil tank average oil temperature Ta, outputting a second judgment result by a second judgment module for the EH oil tank liquid level Ll and the EH oil tank average liquid level La, outputting a third judgment result by a third judgment module for the EH oil pump main pipe oil pressure Pp and the EH oil pump average main pipe oil pressure Pa, outputting a fourth judgment result by a fourth judgment module for the EH oil pump working current Ii and the EH oil pump average working current, and taking the third judgment result and the EH oil pump operation signal C as the input of a first phase module and the output result as a fifth judgment result;
and inputting the first judgment result, the second judgment result, the fourth judgment result and the fifth judgment result into the delay opening module after passing through the second phase module, finally inputting the judgment result into the early warning result output module, and sending the judgment result to the output display screen through the early warning result output module.
2. The turbine EH oil pump regulating module fault early warning system of claim 1, wherein: the first judgment module comprises a first subtracter module, a first absolute value module and a first selected small value module, wherein the EH oil temperature Tt and the EH oil tank average oil temperature Ta are used as input ends of the first subtracter module, an output end of the first subtracter module is connected with an input end of the first absolute value module, an output end of the first absolute value module is connected with an input end of the first selected small value module, an input end of the first selected small value module is further connected with a first fixed value input end, and an output end of the first selected small value module is connected with an input end of the second selected small value module.
3. The turbine EH oil pump regulating module fault early warning system of claim 1, wherein: the second judgment module comprises a second subtracter module, a second absolute value module and a second small value selection module, the EH mailbox liquid level Ll and the EH mailbox average liquid level La are used as input ends of the second subtracter module, an output end of the second subtracter module is connected with an input end of the second absolute value module, an output end of the second absolute value module is connected with an input end of the second small value selection module, an input end of the second small value selection module is further connected with a second fixed value input end, and an output end of the second small value selection module is connected with an input end of the second phase and the module.
4. The turbine EH oil pump regulating module fault early warning system of claim 1, wherein: the third judgment module comprises a third subtracter module, a third absolute value module and a first selected large value module, the EH oil pump main pipe oil pressure Pp and the EH oil pump average oil pump main pipe oil pressure Pa are used as input ends of the third subtracter module, an output end of the third subtracter module is connected with an input end of the third absolute value module, an output end of the third absolute value module is connected with an input end of the first selected large value module, the input end of the first selected large value module is further connected with a third fixed value input end, an output end of the first selected large value module is connected with one input end of the first phase and module, the other input end of the first phase and module is connected with an EH oil pump operation signal C, and an output end of the first phase and module is connected with an input end of the second phase and module.
5. The turbine EH oil pump regulating module fault early warning system of claim 1, wherein: the fourth judgment module comprises a fourth subtracter module, a fourth absolute value module and a second maximum value selection module, the EH oil pump working current Ii and the EH oil pump average oil pump working current Ia are used as input ends of the fourth subtracter module, an output end of the fourth subtracter module is connected with an input end of the fourth absolute value module, an output end of the fourth absolute value module is connected with an input end of the second maximum value selection module, an input end of the second maximum value selection module is further connected with a fourth fixed value input end, and an output end of the second maximum value selection module is connected with an input end of the second phase and the module.
6. The turbine EH oil pump regulating module fault early warning system of any one of claims 1 to 5, wherein: the DCS controller is a DCS controller with the model number of NT 6000.
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|---|---|---|---|
| CN202123208936.8U CN216951104U (en) | 2021-12-20 | 2021-12-20 | Fault early warning system for EH oil pump adjusting module of steam turbine |
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