Gas turbine SSOV double-solenoid-valve control device

Abstract

The invention discloses a gas turbine SSOV double-electromagnetic-valve control device which is characterized by comprising a first electromagnetic valve, a second electromagnetic valve, a first three-way channel controlled by the first electromagnetic valve, a second three-way channel controlled by the second electromagnetic valve and an SSOV valve. A port A of the first three-way channel is connected with an air inlet source, and a port A of the second three-way channel is connected with the air inlet source. A port B of the first three-way channel is connected with a port C of the second three-way channel; a port B of the second three-way channel is connected with an air cylinder of the SSOV valve. By the adoption of the method, a new redundant electromagnetic valve connected with an original control electromagnetic valve in parallel is additionally arranged on a gas turbine SSOV valve line, the two electromagnetic valves control an air inlet air source of an SSOV valve air cylinder at the same time, meanwhile, the occurrence of an SSOV valve maloperation accident caused by abnormal control of a single electromagnetic valve is reduced, and it is guaranteed that the air supply flow and pressure of a unit meet the normal operation requirement of the unit.

Description

Technical Field

[0001] The invention relates to the technical field of gas engine control, and in particular to a gas engine SSOV double solenoid valve control device. Background Art

[0002] In recent years, the GE9F unit has started the gas turbine 2.6+ upgrade and renovation, and installed a gas safety shut-off SSOV valve after the outlet flow meter of the front module. The valve is a pneumatic actuator, and the gas source is controlled by a solenoid valve to open or close the valve. The function of the SSOV valve is to interrupt the gas supply to the fuel module in the event of gas turbine unit shutdown, emergency tripping, fire protection and natural gas leakage. It is an important device to ensure the safety of the unit. The gas safety shut-off SSOV valve is currently controlled by a single-way solenoid valve. Abnormal failures of the single-way solenoid valve often occur, causing unsafe accidents such as emergency tripping of the unit, which seriously affects the safe operation of the unit.

[0003] More specifically, since the gas safety shut-off SSO valve is in an electrically excited gas-open valve state and in a fully closed valve state when power is off, when the gas source of the valve is abnormal or the control solenoid valve fails, the gas safety shut-off SSOV valve does not have a closing control instruction in the MARK VIe control logic. This single control technology design defect can easily cause the SSOV valve to suddenly lose a single gas source or the solenoid valve loses power abnormally. When such operating defects occur, the gas safety shut-off SSOV valve may automatically close by mistake and other unsafe events may occur, causing the gas turbine P1 gas pressure low fault signal to be output, resulting in the unit RUNBACK automatic load reduction or unit tripping and other protection actions, causing the unit to have an unplanned shutdown and unsafe accident. Summary of the invention

[0004] An embodiment of the present invention provides a gas turbine SSOV dual solenoid valve control device, in which a redundant new solenoid valve connected in parallel with the original control solenoid valve is added to the gas turbine SSOV valve circuit, and the two solenoid valves simultaneously control the air intake source of the SSOV valve cylinder, thereby reducing the occurrence of SSOV valve malfunction accidents caused by abnormal control of a single solenoid valve, and ensuring that the gas supply flow and pressure of the unit meet the normal operation requirements of the unit.

[0005] To achieve the above-mentioned object, an embodiment of the present application provides a gas engine SSOV dual solenoid valve control device, comprising: a first solenoid valve, a second solenoid valve, a first three-way channel controlled by the first solenoid valve, a second three-way channel controlled by the second solenoid valve, and an SSOV valve;

[0006] The port A of the first three-way channel is connected to an intake air source, and the port A of the second three-way channel is connected to an intake air source; the port B of the first three-way channel is connected to the port C of the second three-way channel; and the port B of the second three-way channel is connected to the cylinder of the SSOV valve;

[0007] When the first solenoid valve is energized, the channel between port A and port B of the first three-way channel is connected, and when the first solenoid valve is not energized, the channel between port B and port C of the first three-way channel is connected; when the second solenoid valve is energized, the channel between port A and port B of the second three-way channel is connected, and when the second solenoid valve is not energized, the channel between port B and port C of the second three-way channel is connected.

[0008] In a possible implementation, it also includes a pulse triggering sub-device and a dual solenoid valve self-testing sub-device; the input end of the pulse triggering sub-device is connected to the output end of the MARK VIe controller, the first output end of the pulse triggering sub-device is connected to the first input end of the dual solenoid valve self-testing sub-device, and the second output end of the pulse triggering sub-device is connected to the second input end of the dual solenoid valve self-testing sub-device; the output end of the dual solenoid valve self-testing sub-device is connected to the input end of the SSOV valve engine MARK VIe controller;

[0009] The MARK VIe controller sends the automatic detection start instruction issued by the user to the pulse trigger sub-device. After the pulse trigger sub-device performs logical judgment according to the automatic detection start instruction, it sends the first solenoid valve pulse signal and the second solenoid valve pulse signal to the dual solenoid valve self-test sub-device according to the judgment result.

[0010] In a possible implementation, the pulse trigger sub-device includes a button command processing module, a first relay ladder logic module, a dual solenoid valve control automatic detection logic module, a first pulse trigger module, and a second pulse trigger module;

[0011] The output end of the button command processing module is connected to the input end of the first relay ladder logic module; the output end of the first relay ladder logic module is connected to the input end of the dual solenoid valve control automatic detection logic module, and the output end of the first relay ladder logic module is connected to the input end of the second pulse trigger module; the output end of the dual solenoid valve control automatic detection logic module is connected to the input end of the first pulse trigger module;

[0012] The input end of the button command processing module is connected to the output end of the MARK VIe controller, the output end of the first pulse trigger module is connected to the first input end of the dual solenoid valve self-test sub-device, and the output end of the second pulse trigger module is connected to the second input end of the dual solenoid valve self-test sub-device.

[0013] In a possible implementation, after receiving a user start command, the button command processing module triggers a pulse of a first preset duration and sends an SSOV valve dual solenoid valve automatic test output signal to the first relay ladder logic module.

[0014] In one possible implementation, after the first relay ladder logic module receives the SSOV valve dual solenoid valve automatic test output signal, if the gas turbine unit is not started, and has not received the main protection input signal, and has not received the gas safety shut-off SSOV valve main command start signal of the gas turbine unit, and the gas safety shut-off SSOV valve is in the fully closed position, the SSOV valve first solenoid valve start automatic detection command signal is sent to the dual solenoid valve control automatic detection logic module and the second pulse trigger module.

[0015] In one possible implementation, after the dual solenoid valve control automatic detection logic module receives the SSOV valve first solenoid valve start automatic detection command signal, if it does not receive the SSOV valve position fault alarm signal, it sends the SSOV valve second solenoid valve start automatic detection command signal of the second preset duration to the first pulse trigger module.

[0016] In a possible implementation, after receiving the SSOV valve second solenoid valve start automatic detection instruction signal, the first pulse trigger module sends a first SSOV valve double solenoid valve automatic test start instruction signal of a third preset length to the double solenoid valve self-test sub-device;

[0017] After receiving the SSOV valve second solenoid valve automatic detection start instruction signal, the second pulse trigger module sends a second SSOV valve double solenoid valve automatic test start instruction signal of a third preset length to the double solenoid valve self-test sub-device.

[0018] In a possible implementation, the dual solenoid valve self-test sub-device includes a time delay module, a second relay ladder logic module, a third relay ladder logic module, a fourth relay ladder logic module, a fifth relay ladder logic module, and a sixth relay ladder logic module;

[0019] The output end of the time delay module is connected to the first input end of the third relay ladder logic module; the input end of the second relay ladder logic module is connected to the output end of the third relay ladder logic module, the input end of the second relay ladder logic module is connected to the input end of the fifth relay ladder logic module, the output end of the second relay ladder logic module is connected to the second input end of the third relay ladder logic module, and the output end of the second relay ladder logic module is connected to the input end of the fourth relay ladder logic module; the output end of the fourth relay ladder logic module is connected to the first input end of the sixth relay ladder logic module, and the output end of the fifth relay ladder logic module is connected to the second input end of the sixth relay ladder logic module;

[0020] The input end of the time delay module is connected to the first output end of the pulse trigger sub-device; the input end of the second relay ladder logic module is connected to the second output end of the pulse trigger sub-device; the output end of the sixth relay ladder logic module is connected to the input end of the SSOV valve engine MARK VIe controller.

[0021] In a possible implementation, after receiving the automatic detection signal of the first solenoid valve of the SSOV valve, the fourth relay ladder logic module sends a command signal for starting the SSOV valve to control the first solenoid valve to the sixth relay ladder logic module;

[0022] After receiving the automatic detection signal of the second solenoid valve of the SSOV valve, the fifth relay ladder logic module sends a command signal for starting the SSOV valve to control the second solenoid valve to the sixth relay ladder logic module;

[0023] After the sixth relay ladder logic module receives the command signal for starting the SSOV valve control first solenoid valve or the command signal for starting the SSOV valve control second solenoid valve, if the SSOV valve engine MARK VIe controller feeds back abnormal alarm information, the operation of the dual solenoid valve self-test sub-device is locked and stopped.

[0024] In a possible implementation, before the sixth relay ladder logic module sends the command signal for starting the SSOV valve to control the first solenoid valve, if the fully closed feedback signal of the first solenoid valve is wrong within the first preset time, the fourth relay ladder logic module outputs an SSOV valve position fault alarm signal to lock and stop the operation of the dual solenoid valve self-test sub-device;

[0025] Before sending the command signal for starting the SSOV valve to control the second solenoid valve to the sixth relay ladder logic module, if the fifth relay ladder logic module detects that the fully closed feedback signal of the second solenoid valve is wrong within the second preset time, the fifth relay ladder logic module outputs an SSOV valve position fault alarm signal to lock and stop the operation of the dual solenoid valve self-test sub-device.

[0026] Compared with the prior art, the embodiment of the present invention provides a gas engine SSOV dual solenoid valve control device, in which two solenoid valves respectively control the switch state of their respective three-way channels. When the solenoid valves are excited, they respectively connect the path from the intake air source to the SSOV valve cylinder; when they are not excited, they cut off this path. This can reduce the risk of SSOV malfunction due to a single solenoid valve failure.

[0027] To further enhance the reliability of the system, a pulse trigger sub-device and dual solenoid valve self-test sub-device are added. These components can periodically check the status of the solenoid valves and issue an alarm when potential problems are detected, and even stop the self-test process when necessary to prevent unexpected situations. The self-test process involves multiple steps, including command processing, logical judgment, and sending detection signals through different pulse trigger modules. This process checks whether the solenoid valve is in the correct position and ensures that the solenoid valve can respond correctly within the predetermined time.

[0028] In summary, the present invention aims to improve the safety and reliability of gas turbines by reducing unplanned downtime events caused by single point failures, thereby improving the operating efficiency of power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a gas engine SSOV dual solenoid valve control device provided by one embodiment of the present invention;

[0030] Figure 2 It is a schematic structural diagram of a pulse triggering sub-device and a dual solenoid valve self-testing sub-device provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] To solve the above problems, see Figure 1 An embodiment of the present invention provides a gas engine SSOV dual solenoid valve control device, comprising: a first solenoid valve 1, a second solenoid valve 2, a first three-way channel 10 controlled by the first solenoid valve 1, a second three-way channel 20 controlled by the second solenoid valve 2, and an SSOV valve 3.

[0033] Port A of the first three-way channel 10 is connected to an intake air source, and port A of the second three-way channel 20 is connected to an intake air source; port B of the first three-way channel 10 is connected to port C of the second three-way channel 20; port B of the second three-way channel 20 is connected to the cylinder of the SSOV valve 3.

[0034] When the first solenoid valve is energized, the channel between port A and port B of the first three-way channel 10 is connected, and when the first solenoid valve is not energized, the channel between port B and port C of the first three-way channel 10 is connected; when the second solenoid valve is energized, the channel between port A and port B of the second three-way channel 20 is connected, and when the second solenoid valve is not energized, the channel between port B and port C of the second three-way channel 20 is connected.

[0035] When the gas safety shut-off SSOV valve is in the unit operation state, the MARK VIe logic of the gas turbine requires that when the gas safety shut-off SSOV valve 3 is in the fully open position, the two solenoid valves simultaneously control the cylinder intake air source of the SSOV valve 3, and at the same time reduce the control abnormality of a single solenoid valve, which causes the occurrence of SSOV valve malfunction accidents, and ensure that the unit's gas supply flow and pressure meet the normal operation requirements of the unit.

[0036] When the first solenoid valve 1 of the gas safety shut-off SSOV valve is energized, A→B of the first three-way channel 10 is open; the second solenoid valve 2 is energized, A→B of the second three-way channel 20 is open, then the control gas source passes through the second three-way channel 20 controlled by the second solenoid valve 2, and the gas enters the cylinder of the SSOV valve 3 from A→B, and the control valve of the SSOV valve 3 is in an open state; when the first solenoid valve 1 of the gas safety shut-off SSOV valve is energized, A→B of the first three-way channel 10 is open; the second solenoid valve 2 is not energized (the second solenoid valve 2 is in an abnormal fault control state), and B→C of the second three-way channel 20 is open, then the control gas source passes through the first three-way channel 10 controlled by the first solenoid valve, A→B enters the second three-way channel 20 controlled by the second solenoid valve 2, and C→B reaches the SSOV valve cylinder, and the control valve of the SSOV valve 3 is opened. When the second solenoid valve 2 is in an abnormal fault control state, the SSOV valve can also be controlled by the first solenoid valve 1 to prevent the SSOV valve 3 from malfunctioning; when the gas safety shut-off SSOV valve first solenoid valve 1 is non-excited, B→C of the first three-way channel 10 is open; the second solenoid valve 2 is excited, and A→B of the second three-way channel 20 is open, then the control gas source enters the SSOV valve 3 cylinder through the second three-way channel 20 controlled by the second solenoid valve 2, A→B, and the control valve of the SSOV valve 3 opens.

[0037] When the unit is operating normally, if one of the solenoid valves of the gas safety shut-off SSOV valve is abnormal, the other solenoid valve can ensure the normal working position of the gas safety shut-off SSOV valve, and effectively avoid unsafe accidents such as shutdown and tripping of the unit. When the first solenoid valve 1 of the gas safety shut-off SSOV valve is not excited, B→C is open; the second solenoid valve 2 is not excited, B→C is open, and the two solenoid valves are normally exhausted to close the SSOV valve.

[0038] Compared with the prior art, the embodiment of the present invention provides a gas engine SSOV dual solenoid valve control device, in which two solenoid valves respectively control the switch state of their respective three-way channels. When the solenoid valves are excited, they respectively connect the path from the intake air source to the SSOV valve cylinder; when they are not excited, they cut off this path. This can reduce the risk of SSOV malfunction due to a single solenoid valve failure.

[0039] See also Figure 2 , exemplarily, it also includes a pulse triggering sub-device and a dual solenoid valve self-testing sub-device; the input end of the pulse triggering sub-device is connected to the output end of the MARK VIe controller, the first output end of the pulse triggering sub-device is connected to the first input end of the dual solenoid valve self-testing sub-device, and the second output end of the pulse triggering sub-device is connected to the second input end of the dual solenoid valve self-testing sub-device; the output end of the dual solenoid valve self-testing sub-device is connected to the input end of the SSOV valve engine MARK VIe controller.

[0040] The MARK VIe controller sends the automatic detection start instruction issued by the user to the pulse trigger sub-device. After the pulse trigger sub-device performs logical judgment according to the automatic detection start instruction, it sends the first solenoid valve pulse signal and the second solenoid valve pulse signal to the dual solenoid valve self-test sub-device according to the judgment result.

[0041] After receiving the pulse signal of the first solenoid valve and the pulse signal of the second solenoid valve, the dual solenoid valve self-test sub-device starts to test the solenoid valve. During the test, if any abnormality is found in the solenoid valve, the dual solenoid valve self-test sub-device will send corresponding alarm information to the MARK VIe controller through its output end so that timely measures can be taken, such as adjusting or maintaining the solenoid valve.

[0042] This design not only improves the reliability of the SSOV valve system, but also adds an automated detection function, which can regularly check the status of the solenoid valve without human intervention, thereby preventing SSOV valve misoperation caused by solenoid valve failure, further ensuring the safe and stable operation of the gas turbine unit.

[0043] Exemplarily, the pulse trigger sub-device includes a button command processing module, a first relay ladder logic module, a dual solenoid valve control automatic detection logic module, a first pulse trigger module and a second pulse trigger module.

[0044] The output end of the button command processing module is connected to the input end of the first relay ladder logic module; the output end of the first relay ladder logic module is connected to the input end of the dual solenoid valve control automatic detection logic module, and the output end of the first relay ladder logic module is connected to the input end of the second pulse trigger module; the output end of the dual solenoid valve control automatic detection logic module is connected to the input end of the first pulse trigger module.

[0045] The input end of the button command processing module is connected to the output end of the MARK VIe controller, the output end of the first pulse trigger module is connected to the first input end of the dual solenoid valve self-test sub-device, and the output end of the second pulse trigger module is connected to the second input end of the dual solenoid valve self-test sub-device.

[0046] Exemplarily, after receiving a user start command, the button command processing module triggers a pulse of a first preset duration and sends an SSOV valve dual solenoid valve automatic test output signal to the first relay ladder logic module.

[0047] PBHDLR_1 This module is a button command processing module. This scheme designs a button command output module to operate the SSOV sol auto Test start button on the HMI screen of the gas turbine MARKVIe system, which is associated with the logic point L43SSOV1ON_PB (SSOV Valve-Solenoid Manual On CPB) of the MARK VIe controller, triggering a 1-second pulse output start signal to output the SSOV valve double solenoid valve automatic test output signal (L43SSOV1ON).

[0048] Exemplarily, after the first relay ladder logic module receives the SSOV valve dual solenoid valve automatic test output signal, if the gas turbine unit is not started, and has not received the main protection input signal, and has not received the gas safety shut-off SSOV valve main command start signal of the gas turbine unit, and the gas safety shut-off SSOV valve is in the fully closed position, the SSOV valve first solenoid valve start automatic detection command signal is sent to the dual solenoid valve control automatic detection logic module and the second pulse trigger module.

[0049] RUNG_9 This module is the first relay ladder logic module. After receiving the SSOV sol auto Test button command on the HMI screen of the gas turbine MARK VIe system to output the SSOV valve dual solenoid valve automatic test output signal 1 (L43SSOV1ON) (A) (SSOV 1Valve-Solenoid Auto On OUTPUT), the gas turbine unit is not turned on, the main protection has no input signal L4 (C) (Master protective signal), the gas turbine unit has no gas safety shut-off SSOV valve master command open signal L3VS4_4O (B) (Fuel Gas Safety Shut Off Valve Master CommandOpen), and the gas safety shut-off SSOV valve is in the fully closed position l33vs4_5c (E) (Fuel Gas SSOV Limit Switch-CLOSE), after all signal conditions are met, the module outputs the SSOV valve first solenoid valve start automatic detection command signal L43SSOVON01 (OUT) (SSOV Valve-Solenoid 01Auto On OUTPUT), and the signal is simultaneously referenced and sent to the SSOV valve solenoid valve 2 automatic detection input module RUNG_11 (B) as the SSOV valve second solenoid valve automatic detection output start pulse and waiting detection signal.

[0050] Exemplarily, after the dual solenoid valve control automatic detection logic module receives the SSOV valve first solenoid valve start automatic detection command signal, if it does not receive the SSOV valve position fault alarm signal, it sends the SSOV valve second solenoid valve start automatic detection command signal of the second preset duration to the first pulse trigger module.

[0051] RUNG_11 is a dual solenoid valve control automatic detection logic module. This module receives the SSOV valve first solenoid valve start automatic detection command signal L43SSOVON01(B)(SSOV Valve-Solenoid 01 Auto On OUTPUT), the gas turbine unit is not started, the main protection has no input signal L4(A)(Master protective signal), there is no SSOV valve position fault alarm signal L33VS4_4ALM(C)(Fuel gas safety shut off valve position fault) locking condition, the gas turbine unit has no gas safety shut off SSOV valve master command open signal L3VS4_4O(E)(Fuel GasSafety Shut Off Valve Master Command Open) locking condition, the gas safety shut off SSOV valve is in the fully closed position l33vs4_5c(D)(Fuel Gas SSOV Limit Switch-CLOSE), after all signal conditions are met, this module outputs the SSOV valve second solenoid valve start automatic detection signal L43SSOVON02(OUT)(SSOV The command signal of Valve-Solenoid 02 AutoOn OUTPUT is sent to the second solenoid valve automatic detection pulse module PULSE_1 of SSOV valve at the same time, and a 25-second long pulse is set as the total time of automatic detection, which is used as the long signal for starting the second solenoid valve automatic detection output of SSOV valve.

[0052] Exemplarily, after receiving the SSOV valve second solenoid valve start automatic detection instruction signal, the first pulse trigger module sends the first SSOV valve double solenoid valve automatic test start instruction signal of the third preset length to the double solenoid valve self-test sub-device;

[0053] After receiving the SSOV valve second solenoid valve automatic detection start instruction signal, the second pulse trigger module sends a second SSOV valve double solenoid valve automatic test start instruction signal of a third preset length to the double solenoid valve self-test sub-device.

[0054] PULSE_1 This module is the first pulse trigger module, the SSOV valve second solenoid valve starts the automatic detection command signal L43SSOVON02 (TRIG) (SSOV Valve-Solenoid 02Auto On OUTPUT) input, output 25 seconds long pulse SSOV valve dual solenoid valve automatic test start command signal 3 (L43SSOVON03) (OUT) (output 25 seconds long pulse signal command, ensure the completion time of SSOV valve dual solenoid valve automatic test, wait for the automatic detection of SSOV valve first solenoid valve and second solenoid valve to be completed within 25 seconds), the signal is sent to TIMER_SEC_2 time delay (seconds) module and delayed for 20 seconds (the delay of 20 seconds is mainly to wait for the completion time of SSOV valve first solenoid valve automatic detection, and relax the time width, wait for the valve state to be normal and all conditions to be met after the automatic detection of SSOV valve first solenoid valve is completed, delay the automatic detection of SSOV valve second solenoid valve, prevent the automatic detection from being too fast and causing abnormal fault of SSOV valve, and ensure the normal logic operation of SSOV valve dual solenoid valve automatic detection.) and output the automatic detection of SSOV valve second solenoid valve signal L43SSOV2ON (D) (SSOV 2Valve-Solenoid Auto OnOUTPUT) command to RUNG_14 module.

[0055] PULSE_2 This module is the second pulse trigger module. The input signal of this module is output by the RUNG_9 relay ladder logic module, which is the SSOV valve first solenoid valve start automatic detection signal L43SSOVON01 (OUT) (SSOV Valve-Solenoid 01 Auto On OUTPUT). After the SSOV valve first solenoid valve start automatic detection signal L43SSOVON01 (TRIG) (SSOV Valve-Solenoid 01 Manual On OUTPUT) is input, the module outputs a 10-second long pulse signal SSOV valve double solenoid valve automatic test start signal (L43SSOVON04) (OUT) (SSOV Valve-Solenoid 04AutoOn OUTPUT) instruction to the RUNG_13 (D) relay ladder logic module as the main instruction condition for the SSOV valve first solenoid valve start automatic detection signal to ensure the completion time of the SSOV valve second solenoid valve automatic test.

[0056] PBHDLR_3 is another button command processing module. This button command output module operates the button SSSOV sol OF Test on the HMI screen of the gas turbine MARK VIe system, and is associated with the MARK VIe logic point gas safety shut-off SSOV valve dual solenoid valve automatic test locking manual stop button L43SSOVOFF_PB (SSOV Valve-Solenoid Manual OF CPB), and outputs a 1-second pulse command signal to stop the SSOV valve dual solenoid valve control automatic detection test. If an emergency occurs during the automatic detection test, this button command output module is associated with the operation button SSSOV sol OFTest on the HMI screen of the gas turbine MARK VIe system. The output signal L43SSOVOF (output) locks or stops the SSOV valve dual solenoid valve automatic detection.

[0057] Exemplarily, the dual solenoid valve self-check sub-device includes a time delay module, a second relay ladder logic module, a third relay ladder logic module, a fourth relay ladder logic module, a fifth relay ladder logic module and a sixth relay ladder logic module;

[0058] The output end of the time delay module is connected to the first input end of the third relay ladder logic module; the input end of the second relay ladder logic module is connected to the output end of the third relay ladder logic module, the input end of the second relay ladder logic module is connected to the input end of the fifth relay ladder logic module, the output end of the second relay ladder logic module is connected to the second input end of the third relay ladder logic module, and the output end of the second relay ladder logic module is connected to the input end of the fourth relay ladder logic module; the output end of the fourth relay ladder logic module is connected to the first input end of the sixth relay ladder logic module, and the output end of the fifth relay ladder logic module is connected to the second input end of the sixth relay ladder logic module;

[0059] The input end of the time delay module is connected to the first output end of the pulse trigger sub-device; the input end of the second relay ladder logic module is connected to the second output end of the pulse trigger sub-device; the output end of the sixth relay ladder logic module is connected to the input end of the SSOV valve engine MARK VIe controller.

[0060] TIMER_SEC_2 is a time delay module. After the PULSE_1 pulse module receives the SSOV valve second solenoid valve automatic start detection signal L43SSOVON02 (OUT) (SSOV Valve-Solenoid 02 Auto On OUTPUT) command signal input by RUNG_11, the PULSE_1 pulse module continuously triggers a 25-second pulse signal to output the SSOV valve double solenoid valve automatic test start signal (L43SSOVON03) (log_in) (SSOV Valve-Solenoid 03 Auto On OUTPUT) signal to the TIMER_SEC_2 time delay (seconds) module. The time delay (seconds) module sets a 20-second delay output L43SSOV2ON (log_out) (SSOV 2Valve-Solenoid Auto On OUTPUT) to automatically detect the SSOV valve second solenoid valve command signal. The delay of automatic detection of the second solenoid valve of the SSOV valve is mainly to wait for the state waiting time and the SSOV valve recovery waiting time (about 20 seconds) after the automatic detection of the first solenoid valve of the SSOV valve is completed. After it is normal, the next step is to carry out automatic detection of the second solenoid valve of the SSOV valve to prevent the influence of false operation of the automatic detection logic.

[0061] RUNG_13 This module is the second relay ladder logic module. After the automatic test start signal 4 of the first solenoid valve of the SSOV valve triggers L43SSOVON04(D)(SSOV Valve-Solenoid 04Autol On OUTPUT) to be input into the module, when the SSOV valve does not have the SSOV sol OFTest automatic detection emergency stop button signal L43SSOVOF(B)(SSOV Valve-Solenoid Manual OFOUTPUT) from the HMI screen of the gas turbine MARK VIe control system server SSOV Manual Test and the second solenoid valve of the SSOV valve does not have the automatic detection start signal lSSOV_ON2(A)(SSOV Valve-Solenoid02ManualOUTPUT) locking condition, and there is no gas safety shut-off SSOV valve position fault alarm signal L33VS4_4ALM((C))(Fuel gas safety shut off valve position fault) locking condition, the module outputs the SSOV valve first solenoid valve automatic detection start signal lSSOV_ON1(OUT)(SSOV Valve-Solenoid 01 ManualOUTPUT) is sent to RUNG-6 (B) module to start the automatic detection logic of the first solenoid valve of the SSOV valve, and is also sent to RUNG_14 (B) to lock the second solenoid valve of the SSOV valve and prohibit automatic detection and startup.

[0062] RUNG_14 This module is the third relay ladder logic module, which is mainly used to output signal instructions to automatically detect the second solenoid valve of the SOV valve. When the SSOV valve does not have the SSOV sol OF Test automatic detection emergency stop button signal L43SSOVOF (A) (SSOV Valve-Solenoid Manual OF OUTPUT) locking condition from the gas turbine MARK VIe control system server HMI screen SSOV Manual Test and the SSOV valve first solenoid valve does not automatically detect the start signal lSSOV_ON1 (B) (SSOV Valve-Solenoid 01 Manual OUTPUT) locking condition, and the SSOV valve second solenoid valve automatic detection start signal L43SSOV2ON (D) (SSOV 2Valve-Solenoid Manual On OUTPUT) has triggered the start signal, and there is no gas safety shut-off SSOV valve position fault L33VS4_4ALM (C) (Fuel gas safety shut off valve position fault fault) locking condition, the module outputs the SSOV valve second solenoid valve automatic detection start signal lSSOV_ON2OUT)(SSOV Valve-Solenoid 02Manual OUTPUT) and sends it to RUNG-8(B) module to start the SSOV valve second solenoid valve automatic detection logic, and at the same time sends it to RUNG_13(A) to lock the SSOV valve first solenoid valve to prohibit automatic detection start.

[0063] Exemplarily, after receiving the automatic detection signal of the first solenoid valve of the SSOV valve, the fourth relay ladder logic module sends a command signal for starting the SSOV valve to control the first solenoid valve to the sixth relay ladder logic module;

[0064] After receiving the automatic detection signal of the second solenoid valve of the SSOV valve, the fifth relay ladder logic module sends a command signal for starting the SSOV valve to control the second solenoid valve to the sixth relay ladder logic module;

[0065] After the sixth relay ladder logic module receives the command signal for starting the SSOV valve control first solenoid valve or the command signal for starting the SSOV valve control second solenoid valve, if the SSOV valve engine MARK VIe controller feeds back abnormal alarm information, the operation of the dual solenoid valve self-test sub-device is locked and stopped.

[0066] Exemplarily, before sending the command signal for starting the SSOV valve to control the first solenoid valve to the sixth relay ladder logic module, if the fully closed feedback signal of the first solenoid valve is wrong within the first preset time, the fourth relay ladder logic module outputs an SSOV valve position fault alarm signal to lock and stop the operation of the dual solenoid valve self-test sub-device;

[0067] Before sending the command signal for starting the SSOV valve to control the second solenoid valve to the sixth relay ladder logic module, if the fifth relay ladder logic module detects that the fully closed feedback signal of the second solenoid valve is wrong within the second preset time, the fifth relay ladder logic module outputs an SSOV valve position fault alarm signal to lock and stop the operation of the dual solenoid valve self-test sub-device.

[0068] RUNG_6 This module is the fourth relay ladder logic module. RUNG_6: After the SSOV valve first solenoid valve automatic test start signal 4 (L43SSOVON04) (D) (SSOV Valve-Solenoid 04 Auto On OUTPUT) is input into the RUNG_13 module, the SSOV valve first solenoid valve automatic detection signal lSSOV_ON1 (B) (SSOV Valve-Solenoid 01AutoOUTPUT) is output to the RUNG_6 module, starting the SSOV valve control first solenoid valve command signal l20vs4_4o1 (OUT) (FuelGas Safety Shutoff Valve-Solenoid Valve1) output, the first solenoid valve of the SSOV valve is energized and actuated, the SSOV valve is opened in 10 seconds and the feedback signal of the SSOV valve fully opened in the specified time is automatically detected to see if it is correct. After 10 seconds, the first solenoid valve of the SSOV valve loses power and closes the SSOV valve, and automatically detects whether the feedback signal of the SSOV valve fully closed in the specified time is correct. Otherwise, the SSOV valve position fault alarm signal (L33VS4_4ALM) (Fuel gas safety shut off valve positionfault) is output to lock and stop the automatic detection logic of the SSOV valve. The original SSOV valve unit operation control valve opening signal L3VS4_4O (A) is combined with the input signal, and the automatic detection signal and the gas turbine control signal are independent of each other and do not affect each other's control. (Note: The 10S time comes from the time set by the PULSE_2 module).

[0069] RUNG_8 This module is the fifth relay ladder logic module. After the SSOV valve dual solenoid valve automatic test output signal 2 (L43SSOV2ON) (D) (SSOV Valve-Solenoid Autol On OUTPUT 2) is input into the RUNG_14 module, after the automatic test conditions are met, the SSOV valve second solenoid valve automatic detection signal lSSOV_ON2 (OUT) (SSOV Valve-Solenoid02 Autol OUTPUT) is output, and the SSOV valve is started to control the second solenoid valve command signal (l20vs4_4o2) (OUT) (Fuel Gas Safety Shutoff Valve-Solenoid Valve2) output, the second solenoid valve of the SSOV valve is energized and actuated, the SSOV valve is opened in 5 seconds and the feedback signal of the SSOV valve fully opened in the specified time is automatically detected to see if it is correct. After 5 seconds, the second solenoid valve of the SSOV valve loses power and closes the SSOV valve, and automatically detects whether the feedback signal of the SSOV valve fully closed in the specified time is correct. Otherwise, the SSOV valve position fault alarm signal (L33VS4_4ALM) (Fuel gas safety shut off valve position fault) is output to lock and stop the automatic detection logic of the SSOV valve. The original SSOV valve unit operation control valve opening signal L3VS4_4O (A) (Fuel Gas Safety Shut Off Valve Master Command Open) is combined with the input signal, and the automatic detection signal and the gas turbine control signal are independent of each other and do not affect each other's control. Note: (Total time 25S-Extended 20S=5S, the time for automatic testing the second solenoid valve of the SSOV valve is 5S).

[0070] RUNG_10 This module is the sixth relay ladder logic module. After the SSOV valve control first solenoid valve opening command signal l20vs4_4o1(A)(Fuel Gas Safety Shutoff Valve-Solenoid Valve1) and the second solenoid valve opening command signal l20vs4_4o1(B)(Fuel Gas Safety Shutoff Valve-Solenoid Valve2) are input into the module, when the signal comes at the same time or any one of them comes to open the SSOV valve double solenoid valve control command, it is sent to the original SSOV valve gas turbine MARK VIe controller to perform alarm logic judgment and judge whether the SSOV valve switch action is normal. If it is judged abnormal, the gas safety shut-off SSOV valve position fault alarm signal L33VS4_4ALM(OUT)(Fuel gas safety shut offvalve position fault) is output, and the SSOV valve double solenoid valve automatic test logic is automatically stopped by locking.

[0071] To sum up, in the whole process, the operator first presses the automatic detection button on the MARK VIe server HMI screen, and the signal is sent to the MARK VIe logic L43SSOV3ON_PB button module. The L43SSOV3ON_PB button module sends a 1-second pulse to trigger the logic to start automatic detection.

[0072] After the L43SSOV3ON_PB button module is triggered, if the automatic detection logic conditions are met and no stop automatic detection signal (L43SSOVOFF_PB: SSOV Valve-Solenoid Manual OF CPB) is issued, the MARK VIe logic first triggers the first solenoid valve automatic detection logic lSSOV_ON1 (SSOV Valve-Solenoid 01Auto OUTPUT) output signal, then the first solenoid valve instruction l20vs4_4o1 (Fuel Gas Safety Shutoff Valve-Solenoid Valve1) outputs the control power supply, and the first solenoid valve is energized to excite the SSOV valve to open. If the SSOV valve fails and cannot open normally, the MARK VIe logic will issue the SSOV valve position fault L33VS4_4ALM (Fuel gas safety shut off valve position fault) after 6 seconds. At the same time, the HMI screen also issues a red display fault alarm (SSOV Sol Test fault). The MARK VIe gas safety shut-off SSOV valve double solenoid valve automatic detection logic automatically locks and stops detection. The automatic detection can only be performed after the fault inspection and processing are normal.

[0073] If the first solenoid valve completes the automatic detection normally within the specified time, there is no fault alarm. After 20 seconds, the MARK VIe logic automatically enters the second solenoid valve automatic detection logic lSSOV_ON2 (SSOV Valve-Solenoid 02AutoOUTPUT) output signal, then the second solenoid valve instruction l20vs4_4o2 (Fuel Gas Safety Shutoff Valve-Solenoid Valve2) outputs the control power supply, and the second solenoid valve is energized to excite the SSOV valve to open. If the SSOV valve fails to open normally, the MARK VIe logic will issue an SSOV valve position fault L33VS4_4ALM (Fuel gas safetyshut off valve position fault) after 6 seconds. At the same time, the HMI screen will also issue a red display fault alarm (SSOV SolTest fault). The MARK VIe gas safety shutoff SSOV valve double solenoid valve automatic detection logic automatically locks and stops detection. The automatic detection can only be performed after the fault inspection and processing are normal.

[0074] The HMI screen is equipped with an SSOV sol OF Test automatic detection emergency stop button. If an emergency occurs during the automatic detection process, the operator can output through the SSOV sol OF Test stop button. After receiving the command, the MARK VIe logic L43SSOVOFF_PB (SSOV Valve-Solenoid Manual OF CPB) module automatically stops the detection logic, the dual solenoid valves lose power, and the gas safety shut-off SSOV valve automatically closes to ensure the safety of automatic detection.

[0075] After the gas safety shut-off SSOV valve double solenoid valve automatic detection logic is completed, there is no fault alarm normally, and the SSOV valve status is displayed as normal. In actual application, the operator can automatically detect once a month, find faults in time and deal with them in time to ensure the safe operation of equipment and units. It can not only effectively protect the unit, but also improve the economic benefits of the enterprise, and has a very high promotion and applicability.

[0076] Compared with the prior art, the embodiment of the present invention provides a gas engine SSOV dual solenoid valve control device, in which two solenoid valves respectively control the switch state of their respective three-way channels. When the solenoid valves are excited, they respectively connect the path from the intake air source to the SSOV valve cylinder; when they are not excited, they cut off this path. This can reduce the risk of SSOV malfunction due to a single solenoid valve failure.

[0077] To further enhance the reliability of the system, a pulse trigger sub-device and dual solenoid valve self-test sub-device are added. These components can periodically check the status of the solenoid valves and issue an alarm when potential problems are detected, and even stop the self-test process when necessary to prevent unexpected situations. The self-test process involves multiple steps, including command processing, logical judgment, and sending detection signals through different pulse trigger modules. This process checks whether the solenoid valve is in the correct position and ensures that the solenoid valve can respond correctly within the predetermined time.

[0078] In summary, the present invention aims to improve the safety and reliability of gas turbines by reducing unplanned downtime events caused by single point failures, thereby improving the operating efficiency of power plants.

[0079] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A gas turbine SSOV dual solenoid valve control device, characterized in that: include: a first solenoid valve, a second solenoid valve, a first three-way passage controlled by the first solenoid valve, a second three-way passage controlled by the second solenoid valve, and an SSOV valve; The port A of the first three-way channel is connected to an intake air source, and the port A of the second three-way channel is connected to an intake air source; the port B of the first three-way channel is connected to the port C of the second three-way channel; and the port B of the second three-way channel is connected to the cylinder of the SSOV valve; When the first solenoid valve is energized, the channel between port A and port B of the first three-way channel is connected, and when the first solenoid valve is not energized, the channel between port B and port C of the first three-way channel is connected; when the second solenoid valve is energized, the channel between port A and port B of the second three-way channel is connected, and when the second solenoid valve is not energized, the channel between port B and port C of the second three-way channel is connected.

2. A gas engine SSOV dual solenoid valve control device as claimed in claim 1, characterized in that: It also includes a pulse triggering sub-device and a dual solenoid valve self-testing sub-device; the input end of the pulse triggering sub-device is connected to the output end of the MARK VIe controller, the first output end of the pulse triggering sub-device is connected to the first input end of the dual solenoid valve self-testing sub-device, and the second output end of the pulse triggering sub-device is connected to the second input end of the dual solenoid valve self-testing sub-device; the output end of the dual solenoid valve self-testing sub-device is connected to the input end of the SSOV valve engine MARK VIe controller; The MARK VIe controller sends the automatic detection start instruction issued by the user to the pulse trigger sub-device. After the pulse trigger sub-device performs logical judgment according to the automatic detection start instruction, it sends the first solenoid valve pulse signal and the second solenoid valve pulse signal to the dual solenoid valve self-test sub-device according to the judgment result.

3. A gas engine SSOV dual solenoid valve control device as claimed in claim 2, characterized in that: The pulse trigger sub-device includes a button command processing module, a first relay ladder logic module, a dual solenoid valve control automatic detection logic module, a first pulse trigger module and a second pulse trigger module; The output end of the button command processing module is connected to the input end of the first relay ladder logic module; the output end of the first relay ladder logic module is connected to the input end of the dual solenoid valve control automatic detection logic module, and the output end of the first relay ladder logic module is connected to the input end of the second pulse trigger module; the output end of the dual solenoid valve control automatic detection logic module is connected to the input end of the first pulse trigger module; The input end of the button command processing module is connected to the output end of the MARK VIe controller, the output end of the first pulse trigger module is connected to the first input end of the dual solenoid valve self-test sub-device, and the output end of the second pulse trigger module is connected to the second input end of the dual solenoid valve self-test sub-device.

4. A gas engine SSOV dual solenoid valve control device as claimed in claim 3, characterized in that: After receiving the user's start command, the button command processing module triggers a pulse of a first preset duration and sends an SSOV valve double solenoid valve automatic test output signal to the first relay ladder logic module.

5. A gas engine SSOV dual solenoid valve control device as claimed in claim 3, characterized in that: After the first relay ladder logic module receives the SSOV valve dual solenoid valve automatic test output signal, if the gas turbine unit is not started, and has not received the main protection input signal, and has not received the gas safety shut-off SSOV valve main command start signal of the gas turbine unit, and the gas safety shut-off SSOV valve is in the fully closed position, the SSOV valve first solenoid valve start automatic detection command signal is sent to the dual solenoid valve control automatic detection logic module and the second pulse trigger module.

6. A gas engine SSOV dual solenoid valve control device as claimed in claim 3, characterized in that: After the dual solenoid valve control automatic detection logic module receives the SSOV valve first solenoid valve start automatic detection command signal, if it does not receive the SSOV valve position fault alarm signal, it sends the SSOV valve second solenoid valve start automatic detection command signal of the second preset duration to the first pulse trigger module.

7. A gas engine SSOV dual solenoid valve control device as claimed in claim 3, characterized in that: After receiving the automatic detection start instruction signal of the second solenoid valve of the SSOV valve, the first pulse trigger module sends a first SSOV valve double solenoid valve automatic test start instruction signal of a third preset length to the double solenoid valve self-test sub-device; After receiving the SSOV valve second solenoid valve automatic detection start instruction signal, the second pulse trigger module sends a second SSOV valve double solenoid valve automatic test start instruction signal of a third preset length to the double solenoid valve self-test sub-device.

8. A gas engine SSOV dual solenoid valve control device as claimed in claim 2, characterized in that: The dual solenoid valve self-checking sub-device includes a time delay module, a second relay ladder logic module, a third relay ladder logic module, a fourth relay ladder logic module, a fifth relay ladder logic module and a sixth relay ladder logic module; The output end of the time delay module is connected to the first input end of the third relay ladder logic module; the input end of the second relay ladder logic module is connected to the output end of the third relay ladder logic module, the input end of the second relay ladder logic module is connected to the input end of the fifth relay ladder logic module, the output end of the second relay ladder logic module is connected to the second input end of the third relay ladder logic module, and the output end of the second relay ladder logic module is connected to the input end of the fourth relay ladder logic module; the output end of the fourth relay ladder logic module is connected to the first input end of the sixth relay ladder logic module, and the output end of the fifth relay ladder logic module is connected to the second input end of the sixth relay ladder logic module; The input end of the time delay module is connected to the first output end of the pulse trigger sub-device; the input end of the second relay ladder logic module is connected to the second output end of the pulse trigger sub-device; the output end of the sixth relay ladder logic module is connected to the input end of the SSOV valve engine MARK VIe controller.

9. A gas engine SSOV dual solenoid valve control device as claimed in claim 8, characterized in that: After receiving the automatic detection signal of the first solenoid valve of the SSOV valve, the fourth relay ladder logic module sends a command signal for starting the SSOV valve to control the first solenoid valve to the sixth relay ladder logic module; After receiving the automatic detection signal of the second solenoid valve of the SSOV valve, the fifth relay ladder logic module sends a command signal for starting the SSOV valve to control the second solenoid valve to the sixth relay ladder logic module; After the sixth relay ladder logic module receives the command signal for starting the SSOV valve control first solenoid valve or the command signal for starting the SSOV valve control second solenoid valve, if the SSOV valve engine MARK VIe controller feeds back abnormal alarm information, the operation of the dual solenoid valve self-test sub-device is locked and stopped.

10. A gas engine SSOV dual solenoid valve control device as claimed in claim 9, characterized in that: Before sending the command signal for starting the SSOV valve to control the first solenoid valve to the sixth relay ladder logic module, if the fully closed feedback signal of the first solenoid valve is wrong within the first preset time, the fourth relay ladder logic module outputs an SSOV valve position fault alarm signal to lock and stop the operation of the dual solenoid valve self-test sub-device; Before sending the command signal for starting the SSOV valve to control the second solenoid valve to the sixth relay ladder logic module, if the fifth relay ladder logic module detects that the fully closed feedback signal of the second solenoid valve is wrong within the second preset time, the fifth relay ladder logic module outputs an SSOV valve position fault alarm signal to lock and stop the operation of the dual solenoid valve self-test sub-device.

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