Fast switching power supply redundancy and AST electromagnetic valve control system

Abstract

The invention provides a fast switching power supply redundancy and AST electromagnetic valve control system. The fast switching power supply redundancy and AST electromagnetic valve control system is composed of six modules including a fast switching power supply redundancy module, a control cabinet, a temperature control cooling module, a pressure monitoring and alarming module, an online test and maintenance module and a monitoring and protection logic module. The main and auxiliary 220VDC power supply separation redundancy design is adopted, power is supplied to AST electromagnetic valves and main oil switch closed loops of different channels, even if a single power supply fails, the other channel can still keep the necessary protection unit action capacity, whole machine tripping caused by fast switching device faults or single-point failure is avoided, the fault resisting capacity of the system is improved, and the service life of the system is prolonged. A vortex tube cooler is arranged in a control cabinet, cold air separated from compressed air is used for directionally cooling a solenoid valve coil, and a temperature sensor and temperature control logic are combined to realize automatic start-stop control of a cooling device, so that the working temperature of a solenoid valve is stably maintained below 80 DEG C, coil burning loss faults caused by overheating are reduced, and the service life of the solenoid valve is prolonged. The service life of equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam turbine protection system, and particularly relates to a fast switching power redundancy and AST solenoid valve control system. BACKGROUND

[0002] In the operation process of large coal-fired generating units, the continuity and safety of the unit are highly dependent on the stable work of the protection and control system; among them, the fast switching device and the AST (Automatic Stop Trip) solenoid valve are the key equipment to ensure the safe operation of the steam turbine; the main function of the fast switching device is to automatically switch to the standby power supply in a very short time when the auxiliary power system fails, the main power supply fails or the voltage fluctuates abnormally, to ensure the continuous power supply of the control system and the actuator, and to avoid the failure of the protection logic or the delay of the action caused by the power interruption; especially in supercritical and above grade units, even a millisecond level power interruption may cause protection misoperation, leading to main fuel trip, which brings serious risk to the operation of the unit. However, the prior art still has the following problems: Insufficient power redundancy: most fast switching devices use two 220VDC power supplies through the same device, once the fast switching device itself fails or the switching action is delayed, it will directly cause the AST solenoid valve to lose power and cause the unit to trip.

[0003] AST solenoid valve overheating: the AST solenoid valve is in a live operating state for a long time, the coil is seriously heated, especially in summer, the temperature can reach more than 130℃, which is easy to cause burnout failure and threatens the safety of the unit.

[0004] Inconvenient maintenance: the overhaul or replacement of the AST solenoid valve often needs to be implemented after shutdown, which causes the unit availability to decrease.

[0005] Insufficient monitoring means: the existing system generally lacks online monitoring and linkage alarm of power, oil pressure and temperature, and it is difficult for the operator to find hidden dangers and take measures in time.

[0006] Therefore, a fast switching power redundancy and AST solenoid valve control system is proposed. SUMMARY

[0007] Therefore, the present application provides a fast switching power redundancy and AST solenoid valve control system to solve or alleviate the technical problems in the prior art, at least to provide a beneficial choice.

[0008] The technical scheme of the present application is as follows: a fast switching power redundancy and AST solenoid valve control system, comprising: The fast switching power redundancy module is used for supplying power to the first channel AST electromagnetic valve group and the second channel AST electromagnetic valve group by the main 220VDC power supply and the auxiliary 220VDC power supply respectively, and completes switching within not more than 5ms when any power supply is abnormal; The control cabinet is provided with an electromagnetic valve installation layer and a control module layer, and is configured with an electrical terminal strip, an isolation unit and a cooling unit. The cabinet body adopts a metal double-layer structure, and the protection level is not less than IP55. The temperature control cooling module adopts a vortex tube cooler combined with a temperature sensor, a temperature controller and a temperature control electromagnetic valve. When the temperature in the cabinet is higher than 55℃, the cooling is automatically started. When the temperature is lower than 45℃, the cooling is stopped. The pressure monitoring and alarm module is used for monitoring the AST oil pressure range of 0 to 2MPa and the compressed air pressure range of 0.6 to 0.8MPa in real time, and outputs a signal to the upper control system. The online test and maintenance module has an isolation device and an interlocking logic button, and realizes online test and isolation maintenance of the electromagnetic valve. The monitoring and protection logic module is integrated in the digital electro-hydraulic control system DEH, and is based on the double-channel fault-tolerant principle. The turbine admission valve is closed only when both channels meet the tripping conditions. When the power supply is abnormal, the fast switching device fails or the oil pressure and temperature are abnormal, an alarm is issued.

[0009] Further preferably, the fast switching power redundancy module adopts power separation. The main 220VDC supplies power to 1YV, 3YV and the main oil switch closing 1 loop respectively, and the auxiliary 220VDC supplies power to 2YV, 4YV and the main oil switch closing 2 loop respectively. The two power supplies are independent of each other through independent control loops. By supplying power to different numbered AST electromagnetic valves (1YV, 3YV and 2YV, 4YV) and corresponding main oil switch closing loops by the main 220VDC and the auxiliary 220VDC respectively, the two power supplies can be completely separated and independent of each other. Even if one of the main power supply or the auxiliary power supply fails, the other loop still has the ability to maintain necessary protection.

[0010] Further preferably, the fast switching power redundancy module includes a non-disturbance fast switching device and a power monitoring relay. The fast switching device performs zero potential window switching when the power supply voltage is lower than 200VDC, the voltage is lost or the voltage drops momentarily. The power monitoring relay issues different priority alarms when the power supply is abnormal. The fast switching device is used to immediately perform zero potential window switching when it detects that the power supply voltage is lower than 200VDC, the voltage is completely lost or the voltage drops momentarily, to ensure that the switching action does not produce arc and interference. The power monitoring relay is used to continuously monitor the power supply state and issue alarm signals of corresponding priority when the power supply has different degrees of abnormality, to help the operator judge the nature and urgency of the fault.

[0011] Further preferably, the temperature control cooling module adopts a compressed air driven vortex tube cooler, the cold end outlet is directed to the electromagnetic valve coil area through a flow guide channel, and the hot end outlet is discharged outside the cabinet. The temperature sensor has a measurement range of 0-200℃; The vortex tube cooler does not require additional power supply and can separate the airflow into cold and hot ends by using compressed air driving. The cold end airflow directly acts on the AST electromagnetic valve coil area through the flow guide channel to reduce its temperature rise. The hot end is discharged outside the cabinet to prevent heat accumulation inside the cabinet. The temperature sensor has a measurement range of 0-200℃, which ensures that it can cover the temperature changes of the electromagnetic valve under all operating conditions, reduce the burnout failure caused by coil overheating, and ensure that the temperature inside the cabinet is controlled.

[0012] Further preferably, the upper layer of the control cabinet is the control module layer, and the lower layer is the electromagnetic valve installation layer. The cabinet body of the control cabinet is provided with a cold air guide channel, a heat dissipation assembly, and a detachable maintenance panel. The control modules are arranged on the upper layer of the control cabinet, and the electromagnetic valves are installed on the lower layer, so that the signal and execution parts form a reasonable spatial distribution. The cabinet body is provided with a cold air guide channel and a heat dissipation assembly for air circulation with the cooling module. The detachable maintenance panel allows the operator to quickly replace the electromagnetic valve or sensor without affecting the overall wiring.

[0013] Further preferably, the online test and maintenance module includes interlocking logic to ensure that the second channel remains protected when the first channel is in test or isolation state. The test button has an electrical locking function and a state feedback interface. The isolation device includes a mechanical isolation plug and an electrical isolation switch with state detection. The interlocking logic ensures that the second channel must remain protected when the first channel is in test or isolation state, avoiding the loss of dual-channel protection during maintenance or testing. The test button has an electrical locking function and a state feedback interface to ensure that the test operation is controllable and the operator is aware of the state in real time. The isolation device consists of a mechanical plug and an electrical isolation switch. The former ensures physical disconnection, and the latter provides state monitoring to ensure that the electromagnetic valve and the system are completely isolated during maintenance.

[0014] Further preferably, the pressure monitoring and alarm module uses a pressure transmitter with a measurement range of 0-2MPa. When the AST oil pressure is lower than 0.8MPa or the drop rate exceeds 0.2MPa per second, a high-priority alarm is triggered and online testing is prohibited. When the compressed air pressure is lower than 0.6MPa, the cooling module is stopped and an alarm is issued. The AST oil pressure and compressed air pressure are monitored in real time by a pressure transmitter, the oil pressure measurement range is set to 0-2 MPa, which can cover the normal and abnormal operation range, when the oil pressure is lower than 0.8 MPa or the falling rate exceeds 0.2 MPa / s, a high priority alarm is triggered, and the online test is automatically prohibited to avoid misoperation caused by insufficient oil pressure; If the cooling air pressure is lower than 0.6 MPa, the cooling module is stopped and an alarm is triggered to prevent cooling failure caused by insufficient air supply.

[0015] Further preferably, the monitoring and protection logic module displays the power supply state, switching timing, oil pressure and cabinet temperature trend, alarm information and channel on-off state in the DEH operation interface, and records the sequence of events SOE with a resolution not less than 1 ms.

[0016] Further preferably, the AST solenoid valves are configured in groups according to channels, and each channel includes at least two solenoid valves acting on the emergency trip oil path branch and the main oil closing loop respectively, so that the channel still has tripping capability when any single solenoid valve fails or is isolated for maintenance. The AST solenoid valves are configured in groups according to channels, and each channel includes at least two solenoid valves acting on the emergency trip oil path branch and the main oil closing loop respectively, so that the channel still has tripping capability when any single solenoid valve fails or is isolated for maintenance.

[0017] Further preferably, the monitoring and protection logic module has a fast switching fault self-holding operation strategy, that is, in the case of detecting a fast switching device fault or power switching time exceeding 10 ms, the turbine admission valve opening state is maintained and an alarm is triggered.

[0018] The embodiment of the application has the following advantages due to the use of the above technical solutions: Firstly, the application adopts a main and auxiliary 220VDC power supply separation redundancy design, which respectively supplies power to the AST solenoid valves and the main oil closing loop of different channels, so that even if a single power supply fails, the other channel can still maintain the necessary protection unit action capability, thereby avoiding the whole machine tripping caused by fast switching device failure or single point failure, and improving the anti-failure capability of the system.

[0019] Secondly, the application configures a vortex tube cooler in the control cabinet, which uses the cold air separated from compressed air to directionally cool the solenoid valve coil, and combines temperature sensors and temperature control logic to realize automatic start-stop control of the cooling device, so that the working temperature of the solenoid valve is stably maintained below 80℃, reducing the coil burnout failure caused by overheating and prolonging the service life of the equipment.

[0020] Third, the online test and maintenance module is arranged, the running personnel can complete the test and maintenance of the single-channel AST electromagnetic valve under the condition that the unit does not stop, the interlocking logic is used to ensure that when one channel is in the test or isolation state, the other channel keeps the protection function, the risk caused by the simultaneous withdrawal of the protection state of the two channels is avoided, and the complete isolation of the target electromagnetic valve is realized through the mechanical isolation plug-in part and the electrical isolation switch during the maintenance process, so that the unit availability is improved, and the production loss caused by shutdown maintenance is reduced.

[0021] Fourth, the power supply monitoring relay, temperature sensor and pressure transmitter are arranged in the control cabinet, the power supply voltage, the temperature in the cabinet, the hydraulic oil pressure and the compressed air pressure can be monitored in real time, when the oil pressure is lower than 0.8MPa or the descending rate exceeds 0.2MPa per second, the system triggers a high-priority alarm and automatically shields the online test entrance; when the compressed air pressure is lower than 0.6MPa, the cooling module automatically stops and alarms; when the temperature in the cabinet exceeds the set value, the cooling device is automatically started to reduce the temperature, the safety of the system is improved through multi-stage monitoring and alarm, and the running personnel can timely find and dispose abnormal working conditions.

[0022] The above summary is only for the purpose of the description and is not intended to limit in any way. In addition to the above-described illustrative aspects, embodiments and features, further aspects, embodiments and features of the present application will be readily apparent from the drawings and detailed description below. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 It is a schematic diagram of power supply redundancy design for the quick switching device of the present application; Figure 2 It is a schematic diagram of the AST electromagnetic valve control cabinet structure of the present application; Figure 3 It is a schematic diagram of the temperature control system of the present application; Figure 4 It is a schematic diagram of the overall system control logic of the present application. DETAILED DESCRIPTION

[0025] In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0026] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0027] As Figures 1-4 shown, the embodiment of the present application provides a quick switching power redundancy and AST solenoid valve control system, which is composed of six modules: quick switching power redundancy module, control cabinet, temperature control cooling module, pressure monitoring and alarm module, online test and maintenance module and monitoring and protection logic module; through integrated design, the six modules can maintain the effective function of the AST system under the operating conditions such as quick switching device failure, power fluctuation or solenoid valve temperature rise, and the AST solenoid valve can still act when the quick switching device fails or the power fluctuates, thereby avoiding direct triggering of unplanned shutdown due to power interruption; In the traditional scheme, the AST solenoid valve is uniformly powered by two 220VDC through the quick switching device, and in the case of quick switching device failure or switching delay exceeding the set value, the main fuel trip is easily triggered, causing the unit to run interruption. The present system increases the separation redundancy structure in the power link: The main 220VDC power supplies the 1YV, 3YV solenoid valves and the main oil switch closing 1 circuit, and the auxiliary 220VDC power supplies the 2YV, 4YV solenoid valves and the main oil switch closing 2 circuit. The two power supplies are independent of each other, forming two independent power supply redundancies. When a single power supply fails, the other circuit can still maintain the necessary protection unit action capability, thereby avoiding the shutdown of the entire machine caused by single point failure; In the power switching process, the present system is configured with a non-disturbance quick switching device. When the power voltage is detected to be lower than 200VDC or to have a transient drop, the non-disturbance quick switching device will automatically complete the switching within the zero potential window, with a switching time of not more than 5ms, which is lower than the tolerance of the AST solenoid valve control circuit to power interruption, ensuring that the solenoid valve coil remains continuously powered during switching. At the same time, power monitoring relays are set in the two power supply circuits to monitor the voltage state in real time, and immediately output an alarm signal to the DEH system when an abnormality is detected, prompting the operator to handle it in time. Through power separation and quick switching, the solenoid valve action capability is maintained in the other circuit when a single power supply fails; On the premise of the above reliable power supply, the present system realizes the integration of the solenoid valve and the control unit through the control cabinet. The control cabinet adopts a metal double-layer structure with a size of 800mm×600mm×2200mm, and has a protection level of IP55, good dustproof, waterproof and corrosion-resistant performance, and is suitable for the complex environment of the steam turbine room; The cabinet body is divided into two layers: the upper layer is a control module layer, which is arranged with a temperature controller, a terminal row, an alarm indicator and a logic unit; the lower layer is an electromagnetic valve installation layer, which is used for centrally installing four AST electromagnetic valves and an oil line interface, a cold air guide channel is arranged between the two layers to ensure that the cooling air flow can uniformly cover the electromagnetic valve coil area; a guide plate and a ventilation hole are additionally arranged inside the cabinet body to make the cold air form directional flow and avoid local heat accumulation; through integrated arrangement, the control cabinet provides a unified carrier for the electromagnetic valves and the control unit, and also reserves installation space for subsequent cooling and pressure monitoring functions, which facilitates the integration of the temperature control cooling and pressure monitoring modules; Since the AST electromagnetic valve is in a live operating state for a long time, the coil often heats up to above 130°C in high temperature seasons, which causes frequent burnout. After solving the integration problem, the system uses a vortex tube cooler to achieve cooling. The vortex tube uses 0.6 to 0.8 MPa compressed air as the air source, which is separated into cold air and hot air after entering the tube body through high-speed rotation. The cold air temperature is reduced by more than 40°C compared with the inlet air, and directly acts on the electromagnetic valve coil area through the cold air channel. The hot air is discharged outside the cabinet to form a stable heat dissipation path. A temperature sensor is installed in the return air channel, with a measurement range of 0 to 200°C, which is used to collect the temperature in the cabinet in real time and transmit it to the temperature controller. The temperature controller sets the upper limit of the temperature to 55°C and the lower limit to 45°C. When the temperature exceeds the upper limit, the output signal drives the temperature control electromagnetic valve to start the vortex cooling. When the temperature drops below the lower limit, the cooling is automatically turned off to realize energy-saving operation. Through this logic control, the working temperature of the AST electromagnetic valve is stably maintained below 80°C, avoiding coil overheating and burnout, and taking into account air consumption and cooling efficiency. After the above temperature is controlled, it is also necessary to ensure the stability of the hydraulic oil line and the cooling air source. The system adds a pressure monitoring and alarm module in the control cabinet to monitor the oil pressure and compressed air pressure. The oil pressure monitoring range is 0 to 2 MPa. When the oil pressure is lower than 0.8 MPa or the drop rate exceeds 0.2 MPa per second, the system will trigger a high-priority alarm and automatically shield the online test inlet in the DEH system to prevent risks caused by misoperation when the oil pressure is insufficient. The pressure of the cooling air is also monitored. When it is lower than 0.6 MPa, the cooling control logic will immediately shut down and alarm to prompt the inspection of the air source. Through the linkage monitoring of oil pressure and air source, the pressure monitoring and alarm module and the temperature control cooling module form a complementary relationship to ensure that the electromagnetic valve is always in a safe thermal and hydraulic environment. During long-term operation of the unit, the function verification and regular maintenance of the AST solenoid valve often cause shutdown, affecting the availability, the test button is arranged on the control cabinet panel of the system, so that when one channel is in a test or isolation state, the other channel must remain normal protection, avoiding the risk caused by the simultaneous withdrawal of the protection state of the two channels; the test button has an electrical locking function and a state feedback interface, and the operator can directly confirm the current test state on the DEH interface; For maintenance requirements, the system is realized by combining the mechanical plug-in isolation piece with the electrical isolation switch, the operator cuts off the power supply before maintenance, then pulls out the isolation piece, so that the target solenoid valve is completely isolated from the system, and the other channel remains protection investment, and the unit operation is not affected; the AST solenoid valve can complete the test and maintenance without interrupting the unit operation, effectively improving the flexibility of operation and maintenance; On the basis of the above-mentioned modules, the system is integrated into the digital electro-hydraulic control system DEH through the monitoring and protection logic module, the power supply state, the switching timing, the oil pressure and the temperature curve in the cabinet, the alarm information and the channel investment and withdrawal state are displayed on the operation interface, the operator can master the overall condition of the system in real time, at the same time, the system has a sequential event recording function with a resolution not less than 1ms, which can provide accurate time sequence data for accident analysis; On the protection logic, the system adopts the double-channel fault-tolerant principle: Any channel solenoid valve action is determined as tripping of the channel, but only when both channels meet the tripping condition at the same time, the DEH sends a command to close the turbine admission valve, which avoids the whole machine shutdown caused by single-channel misoperation, and ensures the reliable execution of the shutdown action in critical situations, when the fast switching device failure or the power supply switching time exceeds 10ms, the system executes the self-holding strategy, maintains the opening of the admission valve and simultaneously alarms, ensuring that the unit can still maintain operation in abnormal conditions, and gaining time for the operator to troubleshoot.

[0028] The overall working process of the fast switching power supply redundancy and the AST solenoid valve control system is as follows: Under normal operation of the unit, the main power supply and the auxiliary power supply are simultaneously in the investment state, and independently supply power to the two groups of AST solenoid valves; the power supply separation structure ensures that the two power supplies do not interfere with each other, providing redundancy and ensuring the independence of the control loop; in this state, the eddy current pipe cooler in the control cabinet is automatically started and stopped according to the temperature control logic, when the temperature in the cabinet is in the set range of 45℃ to 55℃, the cooler is in standby or low-frequency start-stop mode, ensuring that the working temperature of the AST solenoid valve is maintained below 80℃ for a long time, thereby avoiding coil overheating; When a power failure occurs during operation, if the voltage of one of the main power supply or auxiliary power supply is lower than 200VDC, the voltage is lost or there is a transient drop, the quick switching device will automatically switch to the other power supply within the zero potential window, and the switching process is completed within 5 milliseconds; since the switching time is less than the allowable power loss limit of the AST solenoid valve, the solenoid coil continues to be powered, and the whole action does not trigger the turbine to trip, and the unit operation remains stable; If a fault occurs in the quick switching device, the traditional scheme usually causes unified power supply failure, which in turn causes the AST solenoid valve to lose power and trigger MFT; the present application avoids this problem through power separation design, that is, even if the quick switching device fails, the main power supply can still independently maintain the power supply of 1YV, 3YV and the main oil switch closing 1 circuit, and the auxiliary power supply can maintain the power supply of 2YV, 4YV and the main oil switch closing 2 circuit; in this way, the two groups of AST solenoid valves can still operate independently, and the unit is not affected by the quick switching device failure, thereby ensuring the safety of operation; In the temperature control link, when the temperature in the control cabinet exceeds the upper limit value of 55℃, the temperature controller immediately sends a signal to drive the temperature control solenoid valve to open the compressed air channel, and the vortex tube cooler starts immediately, and the cold end air is directly sent to the solenoid coil area through the guide channel to take away the heat; the hot end air flow is discharged to the outside of the cabinet to prevent secondary heat accumulation in the cabinet; when the temperature in the cabinet drops below 45℃, the temperature controller controls the solenoid valve to close, and the cooling device stops working; through this start-stop logic, it can not only prevent the solenoid valve from being burned due to long-term high-temperature operation, but also reduce unnecessary consumption of compressed air; In the pressure monitoring process, the oil pressure and compressed air pressure are collected in real time by the pressure transmitters installed in the control cabinet; if the AST oil pressure is lower than 0.8MPa, or the drop rate exceeds 0.2MPa per second, the system will immediately trigger a high-priority alarm and automatically shield the online test function in the DEH system to prevent misoperation caused by insufficient oil pressure; if the compressed air pressure is lower than 0.6MPa, the cooling control logic will automatically shut down and send an alarm to the operator to check the air source; through the double constraints of oil pressure and air source, the solenoid valve is ensured to operate under the condition that the hydraulic and thermal environments are controlled; When online test and maintenance are needed during operation and maintenance, the operator can operate through the test button on the control cabinet panel; the test button is provided with an electrical locking function and interlocking logic, which ensures that when one channel enters the test or isolation state, the other channel must remain in the protection function, and there is no risk of both channels being withdrawn at the same time, and the test state is returned to the DEH system in real time, which is convenient for the operator to confirm; if the solenoid valve needs to be repaired or replaced, the power supply of the target solenoid valve circuit can be cut off first, and then the mechanical isolation plug-in part is pulled out to completely isolate it from the system, while the solenoid valve of the other channel is still in the protection state to ensure that the unit operation is not affected.

[0029] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A fast switch power redundancy and AST solenoid control system, characterized in that, The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system.

2. The fast switch power redundancy and AST solenoid control system of claim 1, wherein, The application relates to a quick switching power redundancy module for a turbine control system.

3. The fast switch power redundancy and AST solenoid control system of claim 1, wherein, The application relates to a quick switching power redundancy module for a turbine control system.

4. The fast switch power redundancy and AST solenoid control system of claim 1, wherein, The application relates to a quick switching power redundancy module for a turbine control system.

5. The fast switch power redundancy and AST solenoid control system of claim 1, wherein, The application relates to a quick switching power redundancy module for a turbine control system.

6. The fast-makeup power redundancy and AST solenoid control system of claim 1, wherein, The application relates to a quick switching power redundancy module for a turbine control system.

7. The fast-makeup power redundancy and AST solenoid control system of claim 1, wherein, The application relates to a quick switching power redundancy module for a turbine control system.

8. The fast-makeup power redundancy and AST solenoid control system of claim 1, wherein, The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. 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The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system. The application relates to a quick switching power redundancy module for a turbine control system.

9. The fast-makeup power redundancy and AST solenoid control system of claim 1, wherein, The AST electromagnetic valve is arranged in groups by channels, and each channel includes at least two electromagnetic valves which respectively act on the emergency shutdown oil path branch and the main oil closing loop, so that the channel still has the tripping capability when any single electromagnetic valve fails or is isolated for maintenance.

10. The fast switch power redundancy and AST solenoid control system of claim 1, wherein, The monitoring and protection logic module has a fast switching fault self-maintenance operation strategy, that is, in the case that the fast switching device fault is detected or the power switching time exceeds 10 ms, the steam turbine admission valve opening state is maintained and an alarm is triggered.

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