CN213634198U

CN213634198U - Gas turbine electronic controller fault self-diagnosis device

Info

Publication number: CN213634198U
Application number: CN202022024386.3U
Authority: CN
Inventors: 侯建勤; 尹德斌; 余芸; 徐超
Original assignee: Shanghai Institute of Process Automation Instrumentation
Current assignee: Shanghai Institute of Process Automation Instrumentation
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-07-06
Anticipated expiration: 2030-09-15

Abstract

The utility model provides a gas turbine electronic controller fault self-diagnosis device, a serial communication port, including IO integrated circuit board, CPU control module and human-computer interface, the IO integrated circuit board passes through 485 bus modes and is connected with CPU control module, and CPU control module passes through the mode and the human-computer interface connection of ethernet. The utility model discloses the fault that diagnostic device can fix a position gas turbine control system appearance on the whole fast is the sensor trouble, actuating mechanism trouble or electronic controller trouble, and combine the error magnitude information of communication data and communication integrated circuit board, can further refine the fault type in the electronic controller trouble and be CPU control module trouble, communication bus trouble, the communication network trouble of part IO integrated circuit board is still certain channel fault, the time of workman's trouble-shooting has been saved greatly, gas turbine's fail safe nature has been improved, certain reference value has been played for the research of gas turbine control system failure diagnosis method.

Description

Gas turbine electronic controller fault self-diagnosis device

Technical Field

The utility model relates to a self-diagnosis device, in particular to gas turbine electronic controller trouble self-diagnosis device.

Background

A gas turbine is a highly efficient and complex power machine as an internal combustion engine that generates heat energy mainly by air-fuel mixture combustion and converts the heat energy into mechanical energy by a turbine to generate power. The gas turbine is taken as a complex system project with high nonlinear integration, and a control system of the gas turbine is a key functional system for ensuring stable and reliable operation of the gas turbine. Gas turbine control systems have evolved from early mechanical hydraulic regulation to analog electronic control, to now a highly complex multivariable, multiple redundant, multi-function, all-digital electronic control system. The gas turbine unit operation process monitoring system mainly collects operation process data through sensors scattered on all parts to realize monitoring of the gas turbine unit thermal process, and after the sensors input collected performance parameters into an electronic controller, the gas turbine unit is automatically controlled by adopting the actuator to drive actual control quantity so as to ensure safe and stable operation of the gas turbine unit. The electronic controller is used as a core component of the gas turbine control system and controls signal acquisition, calculation processing, analysis and judgment, decision of countermeasures and output control of the whole system, and once any component of the electronic controller fails, normal operation of the gas turbine control system is affected, so that economic loss which is difficult to measure is caused.

Disclosure of Invention

The utility model aims at: and (3) rapidly and accurately positioning faults of a control system of the gas turbine, particularly faults of an electronic controller.

In order to achieve the above object, the technical scheme of the utility model a gas turbine electronic controller fault self-diagnosis device is provided, a serial communication port, including IO integrated circuit board, CPU control module and human-computer interface, the IO integrated circuit board passes through 485 bus modes and is connected with CPU control module, and CPU control module passes through the mode and the human-computer interface connection of ethernet, wherein:

the IO board card comprises an AI board card, an AO board card, a DI board card used for collecting motor state information in the gas turbine electronic controller and a DO board card used for controlling an actuating mechanism in the gas turbine electronic controller, the AI board card is connected with sensors scattered on all parts of the gas turbine, and the AO board card is connected with a pressure control valve of the gas turbine.

Preferably, the AI board card comprises a collection input channel circuit, a reference voltage supply circuit, an analog switch circuit, an AD conversion circuit, a board-mounted CPU circuit one and a communication circuit one, an input end of the collection input channel circuit is connected to the sensors dispersed at each part of the gas turbine, an output end of the collection input channel circuit and an output end of the reference voltage supply circuit are connected to an input end of the AD conversion circuit, an output end of the AD conversion circuit is connected to an input end of the board-mounted CPU circuit one, and the board-mounted CPU circuit one performs information interaction with the CPU control module through the communication circuit one.

The utility model discloses an AI integrated circuit board is inside to contain reference voltage self-diagnosing circuit, and the signal that can automatic switch-over input channel through the procedure is external input still inside reference voltage for confirm that the trouble is sensor trouble still electronic controller trouble. If the failure of the electronic controller is detected, the failure of the CPU of the IO board card, the failure of the communication module of the IO board card, the failure of a certain acquisition channel and even the failure of the whole input channel can be further assisted and positioned.

Preferably, the AO board card comprises a second communication circuit, a second onboard CPU circuit, a DA conversion circuit, a second AD conversion circuit and an output channel circuit, the second onboard CPU circuit is in information interaction with the CPU control module through the second communication circuit, a control signal output end of the second onboard CPU circuit is connected with an input end of the DA conversion circuit, an output end of the DA conversion circuit is connected with input ends of the output channel circuit and the second AD conversion circuit, an output end of the output channel circuit is connected with the executing mechanism, and an output end of the second AD conversion circuit is connected with a digital signal return end of the second onboard CPU circuit.

The utility model discloses an inside AI collection return circuit that contains of AO integrated circuit board, the output voltage of AO integrated circuit board is gathered through the procedure for confirm that the trouble is voltage-controlled valve trouble or electronic controller trouble. If the fault of the electronic controller is detected, the fault can be further assisted to be detected as an AO board card CPU fault, a communication module or a certain output channel fault.

Preferably, the DI board card comprises a DI signal acquisition circuit for acquiring the state information of the motor and a channel self-diagnosis circuit for determining whether the source of the fault is an external motor fault or an electronic controller fault when the acquired motor state information is faulty.

Preferably, the DO board card comprises a coil voltage acquisition circuit for acquiring voltage information to determine whether the failure information is caused by the valve switch state failure or the electronic controller failure when the acquisition of the switch state failure of the actuator occurs, and a DO signal output channel for giving a control instruction to the actuator.

The utility model provides a based on gas turbine electronic controller trouble self-diagnosis device has realized the quick accurate location to gas turbine electronic controller's trouble. Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses the fault that diagnostic device can fix a position gas turbine control system appearance on the whole fast is the sensor trouble, actuating mechanism trouble or electronic controller trouble, and combine the error magnitude information of communication data and communication integrated circuit board, can further refine the fault type in the electronic controller trouble and be CPU control module trouble, communication bus trouble, the communication network trouble of part IO integrated circuit board is still certain channel fault, the time of workman's trouble-shooting has been saved greatly, gas turbine's fail safe nature has been improved, certain reference value has been played for the research of gas turbine control system failure diagnosis method.

Drawings

FIG. 1 is a schematic block diagram of a fault self-diagnosis device for an electronic controller of a gas turbine according to the present invention;

fig. 2 is a schematic block diagram of the AI board of the electronic controller of the present invention;

fig. 3 is a schematic block diagram of the present invention for the AO board of the electronic controller.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

As shown in FIG. 1, the utility model provides a pair of gas turbine electronic controller fault self-diagnosis device includes IO integrated circuit board 1, CPU control module 2 and human-computer interface 3. The IO board card 1 is used as a slave station and is communicated with the CPU control module 2 in a 485 bus mode. The CPU control module 2 is communicated with the IO board card 1 in a 485 bus mode, and is also connected with the human-computer interface 3 in an Ethernet mode.

The IO board card include AI integrated circuit board, AO integrated circuit board, DI integrated circuit board, DO integrated circuit board etc. wherein: the AI board card is connected with a temperature sensor, a pressure sensor, a vibration sensor, a liquid level sensor and the like, the AO board card is connected with a pressure control valve, the DI board card is connected with a motor, and the DO board card is connected with an actuating mechanism.

The AI board is shown in fig. 2, and includes a collecting input channel circuit 102, a reference voltage supply circuit 101, an analog switch circuit 103, an AD conversion circuit one 104, an on-board CPU circuit one 105, and a communication circuit one 106. The acquisition input channel circuit 102 can acquire a standard signal of 0-10V or 4-20ma, and the standard signal is transmitted to the on-board CPU circuit one 105 after passing through the AD conversion circuit one 104. And the onboard CPU circuit I105 carries out information interaction with the CPU control module 2 through the communication circuit I106. The analog switch circuit 103 selects an input channel as an external signal or a reference voltage output by the internal reference voltage supply circuit 101 through a program of the on-board CPU circuit I105, so as to determine whether the source of the data acquisition information fault is an external sensor fault or an electronic controller fault.

The schematic diagram of the AO board is shown in fig. 3, and includes a second communication circuit 111, a second on-board CPU circuit 112, a DA conversion circuit 113, a second AD conversion circuit 114, and an output channel circuit 115. The second communication circuit 111 is responsible for information interaction between the CPU control module 3 and the second onboard CPU circuit 112, and the second onboard CPU circuit 112 outputs a voltage value through the DA conversion circuit 113 via the output channel circuit 115 by a set program to control the voltage-controlled valve. Meanwhile, the numerical value output by the DA conversion circuit 113 is converted into a digital signal by the AD conversion circuit two 114 and is transmitted back to the on-board CPU circuit two 112, and the digital signal is compared with the originally set numerical value, so as to determine whether the information source of the valve opening and closing failure is the external pressure-controlled valve failure or the electronic controller failure.

The DI integrated circuit board is used for collecting state information and the like of the motor, the DI integrated circuit board internally comprises a DI signal collecting circuit and a channel self-diagnosis circuit, and when the collected motor state information fails, whether the source of the failure is an external motor failure or an electronic controller failure is determined by collecting onboard self-diagnosis circuit information.

The DO integrated circuit board is used for controlling the actuating mechanism and comprises an electromagnetic valve, a combustion engine inlet gas pipeline safety shut-off valve, a start-stop control valve and the like. The board card internally comprises a DO signal output channel and a coil voltage acquisition circuit, and when the on-off state of the valve fails, whether the source of the failure information is the valve on-off state failure or the electronic controller failure is determined by acquiring the voltage information of the coil.

When the fault is judged to be the fault of the electronic controller by the method, the fault self-diagnosis device of the electronic controller can position whether the fault type is the fault of the CPU control module, the fault of the communication network, the fault of the IO board card or the fault of a certain channel according to the magnitude of the data error. When all communication data are in fault, judging that the CPU control module is in fault or the Ethernet communication network is in fault; when data of part of the board cards are in fault, judging that the part of the board cards are in fault; when one channel data of one of the board cards has a problem, the channel of the board card is judged to have the problem.

In addition, the fault self-diagnosis device of the electronic controller can also position the fault types of the faults to be faults of the CPU control module, faults of the communication bus and faults of the communication network of part of IO board cards according to the number of board card communications. All the board cards are not communicated, and the fault is judged to be a CPU control module fault or a communication bus fault; judging that one or more board card transceiver mechanisms in the non-communication state are in fault when part of the board cards are not in communication; and when one of the board cards is not in communication, judging that the board card communication module has a fault.

The utility model discloses the fault that diagnostic device can fix a position gas turbine control system on the whole fast is sensor trouble, actuating mechanism trouble or electronic controller trouble to combine the error magnitude information of communication data and communication integrated circuit board, can further fix a position the fault type in the electronic controller trouble, saved the time that the workman looked for the trouble greatly, improved gas turbine's fail safe nature, played certain reference value for the research of gas turbine control system failure diagnosis method.

Claims

1. The utility model provides a gas turbine electronic controller fault self-diagnosis device which characterized in that, includes IO integrated circuit board, CPU control module and human-computer interface, the IO integrated circuit board passes through 485 bus modes and is connected with CPU control module, CPU control module passes through the mode and the human-computer interface connection of ethernet, wherein:

2. The fault self-diagnosis device for the electronic controller of the gas turbine as claimed in claim 1, wherein the AI board comprises a first acquisition input channel circuit, a first reference voltage supply circuit, an analog switch circuit, an AD conversion circuit, a first on-board CPU circuit and a first communication circuit, wherein the input end of the first acquisition input channel circuit is connected to the sensors distributed at each part of the gas turbine, the output end of the first acquisition input channel circuit and the output end of the first reference voltage supply circuit are connected to the input end of the AD conversion circuit, the output end of the AD conversion circuit is connected to the input end of the first on-board CPU circuit, and the first on-board CPU circuit performs information interaction with the CPU control module through the first communication circuit.

3. The fault self-diagnosis device for the electronic controller of the gas turbine as claimed in claim 1, wherein the AO board comprises a second communication circuit, a second on-board CPU circuit, a second DA conversion circuit, a second AD conversion circuit and an output channel circuit, the second on-board CPU circuit performs information interaction with the CPU control module through the second communication circuit, a control signal output end of the second on-board CPU circuit is connected with an input end of the DA conversion circuit, an output end of the DA conversion circuit is connected with input ends of the output channel circuit and the second AD conversion circuit, an output end of the output channel circuit is connected with the actuator, and an output end of the second AD conversion circuit is connected with a digital signal return end of the second on-board CPU circuit.

4. The gas turbine electronic controller fault self-diagnosis device as claimed in claim 1, wherein the DI board card comprises a DI signal acquisition circuit for acquiring status information of the motor and a channel self-diagnosis circuit for determining whether a fault occurs at the root of an external motor fault or an electronic controller fault when the acquired motor status information is faulty.

5. The gas turbine electronic controller fault self-diagnosis device as set forth in claim 1, wherein said DO board includes a coil voltage acquisition circuit for acquiring voltage information to determine whether the source of fault information is a valve switch state fault or an electronic controller fault when acquiring a switch state fault of said actuator and a DO signal output channel for giving a control command to said actuator.