Transient control method and multi-scene application method for high-temperature gas cooled reactor

Abstract

The invention relates to the technical field of nuclear power control, and discloses a transient control method and a multi-scene application method for a high-temperature gas cooled reactor, and the transient control method comprises the steps: monitoring a load loss signal of a user load side of the high-temperature gas cooled reactor; monitoring a main steam pressure value, and generating a main steam pressure signal according to the main steam pressure value; monitoring the state of the bypass valve, and generating a bypass valve switching signal according to the state of the bypass valve; when a load loss signal, a main steam pressure high signal and a bypass valve closing signal are monitored at the same time, RB logic is triggered, and the unit power is controlled to be reduced to a target power set value according to a preset power reduction rate; when it is monitored that the unit power is reduced to the target power set value or the main steam pressure value is stabilized within the preset pressure range, the RB logic is automatically reset, when the RB logic is triggered, the unit power is controlled to be reduced, control over the unit under the transient working condition is achieved, and safe and stable operation of a reactor is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power control, and particularly relates to a transient control method for a high-temperature gas-cooled reactor and a multi-scenario application method. Background Art

[0002] The high-temperature gas-cooled reactor adopts the fourth-generation nuclear power technology, which has the characteristics of good safety, small modularization, environmental friendliness, high efficiency, etc., and has broad promotion prospects. At present, the demonstration project of the high-temperature gas-cooled reactor has been put into commercial operation, mainly for power generation, and the rest of the application scenarios need to be developed urgently.

[0003] The primary circuit of the high-temperature gas-cooled reactor is a helium medium, with a large heat capacity and a low power density. In the event of an accident condition, the accident consequence process is slow, leaving the operator a relatively long intervention time. During normal operation, the "turbine following reactor" operation mode is adopted. In the event of a transient condition, such as a turbine trip, the reactor cannot quickly reduce the reactor power like a pressurized water reactor. And secondary side failures are inevitable. Therefore, how to solve the control of the unit under transient conditions of the high-temperature gas-cooled reactor to ensure the safe and stable operation of the reactor has become a key issue. Summary of the Invention

[0004] In view of this, the present invention provides a transient control method for a high-temperature gas-cooled reactor and a multi-scenario application method to solve the control problem of the unit under transient conditions of the high-temperature gas-cooled reactor.

[0005] In a first aspect, the present invention provides a transient control method for a high-temperature gas-cooled reactor, the method comprising:

[0006] Monitoring the load loss signal on the user load side of the high-temperature gas-cooled reactor;

[0007] Monitoring the main steam pressure value and generating a main steam pressure signal according to the main steam pressure value, the main steam pressure signal including a main steam pressure high signal and a main steam pressure non-high signal;

[0008] Monitoring the bypass valve state and generating a bypass valve switch signal according to the bypass valve state, the bypass valve switch signal including a bypass valve opening signal and a bypass valve closing signal;

[0009] When the load loss signal, the main steam pressure high signal, and the bypass valve closing signal are simultaneously monitored, triggering the RB logic and controlling the unit power to decrease to the target power set value at a preset power reduction rate;

[0010] When it is monitored that the unit power decreases to the target power set value, or when it is monitored that the main steam pressure value is stable within a preset pressure range, automatically resetting the RB logic.

[0011] In the present invention, by taking the simultaneous occurrence of a load loss signal, a high main steam pressure signal, and a bypass valve closing signal as the RB logic trigger signal, when the RB logic is triggered, the unit power is controlled to decrease, and when the unit power decreases to the target power set value or it is monitored that the main steam pressure value is stable within the preset pressure range, the RB logic is automatically reset to achieve the control of the unit under transient conditions and ensure the safe and stable operation of the reactor.

[0012] In an optional embodiment, monitoring the load loss signal on the user load side of the high-temperature gas-cooled reactor includes:

[0013] Obtaining the load status feedback by the isolation valve provided on the user load side of the high-temperature gas-cooled reactor;

[0014] When an abnormality occurs in the user load, the isolation valve is locked and closed, and a load loss signal is generated.

[0015] In the present invention, by the isolation valve feeding back the load status, when an abnormality occurs in the user load, the isolation valve is locked and closed to effectively prevent the abnormal condition from affecting the safe operation of the reactor, and the feedback mechanism of the isolation valve effectively improves the monitoring efficiency of the load loss.

[0016] In an optional embodiment, generating a main steam pressure signal according to the main steam pressure value includes:

[0017] Collecting the main steam header pressure value by using at least three pressure gauges;

[0018] If the number of pressure gauges is three, a median value selection operation is performed on the three collected main steam header pressure values to obtain the main steam pressure value;

[0019] If the number of pressure gauges is four, a two-out-of-four selection operation is performed on the four collected main steam header pressure values to obtain the main steam pressure value;

[0020] If the main steam pressure value exceeds the preset pressure threshold, a high main steam pressure signal is generated;

[0021] If the main steam pressure value does not exceed the preset pressure threshold, a non-high main steam pressure signal is generated.

[0022] In the present invention, by performing a median value selection operation or a two-out-of-four selection operation on the main steam header pressure values collected by the pressure gauges to calculate the main steam pressure value, it is ensured that a relatively accurate main steam pressure value can still be obtained when a certain pressure gauge fails, improving the reliability of the main steam pressure value, comparing the main steam pressure value with the preset pressure threshold, and quickly judging the main steam pressure signal to perform transient control in a timely manner when a high main steam pressure signal appears.

[0023] In an optional embodiment, generating a bypass valve open / close signal according to the bypass valve status includes:

[0024] Monitor the actual closing signal of the bypass valve, and use the signal after delaying the actual closing signal of the bypass valve as the trigger signal for the bypass valve closing signal.

[0025] The present invention uses the signal after delaying the actual closing signal of the bypass valve as the trigger signal for the bypass valve closing signal, avoiding the situation where the RB logic is triggered due to the slow opening of the bypass valve under transient conditions, and improving the stability of the system.

[0026] In a second aspect, the present invention provides a multi-scenario application method for a high-temperature gas-cooled reactor, and the method includes:

[0027] Identify the current scenario application mode of the high-temperature gas-cooled reactor, and the scenario application mode includes at least one scenario combination of steam turbine generator power generation and steam turbine generator power generation with SOEC hydrogen production, molten salt energy storage, heat supply, and heating.

[0028] Under the current scenario application mode, use the transient control method for the high-temperature gas-cooled reactor as described in the first aspect or any corresponding embodiment thereof to perform transient control on the high-temperature gas-cooled reactor.

[0029] The present invention performs transient control on the high-temperature gas-cooled reactor by using the transient control method for the multi-scenario application of the high-temperature gas-cooled reactor, meeting the multi-scenario application of the high-temperature gas-cooled reactor.

[0030] In a third aspect, the present invention provides a transient control device for a high-temperature gas-cooled reactor, and the device includes:

[0031] A first monitoring module for monitoring the load loss signal on the user load side of the high-temperature gas-cooled reactor;

[0032] A second monitoring module for monitoring the main steam pressure value and generating a main steam pressure signal according to the main steam pressure value, and the main steam pressure signal includes a main steam pressure high signal and a main steam pressure non-high signal;

[0033] A third monitoring module for monitoring the bypass valve state and generating a bypass valve switch signal according to the bypass valve state, and the bypass valve switch signal includes a bypass valve opening signal and a bypass valve closing signal;

[0034] A first control module for triggering the RB logic and controlling the unit power to decrease to the target power setting value at a preset power reduction rate when the load loss signal, the main steam pressure high signal, and the bypass valve closing signal are simultaneously monitored;

[0035] A reset module for automatically resetting the RB logic when it is monitored that the unit power has decreased to the target power setting value or the main steam pressure value is stable within a preset pressure range.

[0036] Fourth aspect, the present invention provides a multi-scenario application device for a high-temperature gas-cooled reactor, and the device includes:

[0037] A scenario recognition module, configured to recognize the current scenario application mode of the high-temperature gas-cooled reactor, and the scenario application mode includes steam turbine generator power generation and at least one scenario combination of steam turbine generator power generation and SOEC hydrogen production, molten salt energy storage, heat supply, and heating;

[0038] A second control module, configured to perform transient control on the high-temperature gas-cooled reactor by using the transient control method for a high-temperature gas-cooled reactor according to the first aspect or any corresponding embodiment thereof in the current scenario application mode.

[0039] Fifth aspect, the present invention provides a computer device, including: a memory and a processor, which are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to execute the transient control method for a high-temperature gas-cooled reactor according to the first aspect or any corresponding embodiment thereof, or the multi-scenario application method for a high-temperature gas-cooled reactor according to the second aspect.

[0040] Sixth aspect, the present invention provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions are used to cause a computer to execute the transient control method for a high-temperature gas-cooled reactor according to the first aspect or any corresponding embodiment thereof, or the multi-scenario application method for a high-temperature gas-cooled reactor according to the second aspect.

[0041] Seventh aspect, the present invention provides a computer program product, including computer instructions, and the computer instructions are used to cause a computer to execute the transient control method for a high-temperature gas-cooled reactor according to the first aspect or any corresponding embodiment thereof, or the multi-scenario application method for a high-temperature gas-cooled reactor according to the second aspect. Description of the Drawings

[0042] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0043] Figure 1 is a flowchart of the transient control method for a high-temperature gas-cooled reactor according to an embodiment of the present invention;

[0044] Figure 2 is a flowchart of the RB control logic according to an embodiment of the present invention;

[0045] Figure 3It is a schematic flow chart of a multi-scenario application method for a high-temperature gas-cooled reactor according to an embodiment of the present invention;

[0046] Figure 4 It is a schematic diagram of a high-temperature gas-cooled reactor system according to an embodiment of the present invention;

[0047] Figure 5 It is a structural block diagram of a transient control device for a high-temperature gas-cooled reactor according to an embodiment of the present invention;

[0048] Figure 6 It is a structural block diagram of a multi-scenario application device for a high-temperature gas-cooled reactor according to an embodiment of the present invention;

[0049] Figure 7 It is a schematic hardware structure diagram of a computer device according to an embodiment of the present invention. Detailed implementation manners

[0050] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0051] According to an embodiment of the present invention, an embodiment of a transient control method for a high-temperature gas-cooled reactor is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0052] In this embodiment, a transient control method for a high-temperature gas-cooled reactor is provided, Figure 1 It is a flowchart of a transient control method for a high-temperature gas-cooled reactor according to an embodiment of the present invention, as Figure 1 shown, and the process includes the following steps:

[0053] Step S101, monitor the load loss signal on the user load side of the high-temperature gas-cooled reactor.

[0054] In the embodiment of the present invention, isolation valves and regulating valves are provided on the user load side of the high-temperature gas-cooled reactor. Among them, the load loss signal consists of the feedback of the isolation valve closing. The load loss signal may be one or multiple. For example, when the steam turbine shuts down, the corresponding isolation valve closes, generating a load loss signal. When the steam supply load is lost, the corresponding isolation valve will also close, generating another load loss signal, which is specifically configured according to the application scenarios of the high-temperature gas-cooled reactor.

[0055] It should be noted that if the proportion of the total load of this user in the entire system load is less than 10%, the load loss signal of this user may not be considered.

[0056] Step S102: Monitor the main steam pressure value and generate a main steam pressure signal according to the main steam pressure value.

[0057] In the embodiment of the present invention, the main steam pressure value is monitored to generate a steam pressure signal, and the main steam pressure signal includes a main steam pressure high signal and a main steam pressure non-high signal. When the main steam pressure value during normal operation is set as P, and the actual main steam pressure value P'≥P + 2MPa, a main steam pressure high signal is generated. Here is only an example and not a limitation.

[0058] Step S103: Monitor the bypass valve status and generate a bypass valve switch signal according to the bypass valve status.

[0059] In the embodiment of the present invention, the bypass valve is mainly used to adjust the pressure balance between the primary and secondary loops. Monitor the bypass valve status and generate a bypass valve switch signal. The bypass valve switch signal includes a bypass valve opening signal and a bypass valve closing signal. When the primary and secondary loops are mismatched, the bypass valve is used as a backup means for pressure regulation. The bypass valve closing signal represents that when the primary and secondary loops are mismatched, effective pressure regulation cannot be achieved through the bypass valve, resulting in transient operating condition changes, and the reactor power must be reduced to achieve the balance between the primary and secondary loops.

[0060] Step S104: When the load loss signal, the main steam pressure high signal, and the bypass valve closing signal are simultaneously monitored, trigger the RB logic and control the unit power to decrease to the target power setting value at a preset power reduction rate.

[0061] In the embodiment of the present invention, as Figure 2 shown, the trigger condition of the RB logic (RunBack) is that the load loss signal + the main steam pressure high signal + the bypass valve closing signal appear simultaneously. When the load loss signal, the main steam pressure high signal, and the bypass valve closing signal are simultaneously monitored, trigger the RB control signal, and the reactor will start to reduce power, automatically setting the target power and the power reduction rate. Among them, the power reduction rate is set according to the maximum rate allowed by the unit, which can be obtained through commissioning tests, generally not exceeding 20% RFP (nuclear power) / min. The calculated value of the target power is based on the total power of the load input to the unit. When the motor isolation valve for the input load is fully open + the control valve has an opening feedback, it means that the load has been input.

[0062] The target load of RB is calculated from the load mismatch data between the primary and secondary loops. It should be noted that to avoid excessive reduction of reactor power, the set value of the target load of RB is not lower than 30% of RFP. This is only an example here, and the specific set value can be set according to the actual application scenario. When the reactor power is reduced to 30% of RFP, the system enters a specific mode conversion platform for high-temperature gas-cooled reactors, and specific helium flow ratio protection, power change protection, etc. will automatically take effect and withdraw.

[0063] During the triggering period of the RB logic, the operator can switch to manual control, that is, manually input the target load and the load reduction rate.

[0064] Step S105, when it is monitored that the unit power is reduced to the target power set value, or it is monitored that the main steam pressure value is stable within the preset pressure range, the RB logic is automatically reset.

[0065] In the embodiment of the present invention, when it is monitored that the unit power is reduced to the target power set value, the RB logic will be automatically reset. During the process of reducing the reactor power, the main steam pressure changes dynamically. If it is monitored that the main steam pressure value is stable within the preset pressure range and remains for 5 s, it means that the primary and secondary loops have been matched, and there is no need to further reduce the reactor power, and the RB logic is automatically reset.

[0066] Specifically, taking the main steam pressure value during normal operation as P, when the preset pressure range is set as P + ΔP1 ≤ P′ ≤ P + ΔP2, where P′ is the actual main steam pressure value, the values of ΔP1 and ΔP2 can be set according to the actual application scenario.

[0067] In addition, during the operation of the unit, the main steam pressure needs to be maintained stable. The main steam pressure is kept constant through the steam turbine regulating valve, and the bypass valve, atmospheric relief valve, and safety valve are used as backup controls. The other user regulating valves are adjusted according to their own user requirements and do not participate in the control of the main steam pressure. The connection and disconnection of all users need to maintain the stability of the main steam pressure.

[0068] The transient control method for high-temperature gas-cooled reactors provided in this embodiment uses the simultaneous occurrence of a load loss signal, a high main steam pressure signal, and a bypass valve closing signal as the RB logic trigger signal. When the RB logic is triggered, the unit power is controlled to decrease, and when the unit power is reduced to the target power set value, or it is monitored that the main steam pressure value is stable within the preset pressure range, the RB logic is automatically reset, realizing the control of the unit under transient conditions and ensuring the safe and stable operation of the reactor.

[0069] In this embodiment, a transient control method for high-temperature gas-cooled reactors is provided, and the process includes the following steps:

[0070] Step S201, monitor the load loss signal on the user load side of the high-temperature gas-cooled reactor.

[0071] Specifically, the above step S201 includes:

[0072] Step S2011, obtaining the load status feedback by the isolation valve provided on the user load side of the high-temperature gas-cooled reactor.

[0073] Step S2012, when an abnormality occurs in the user load, locking and closing the isolation valve and generating a load loss signal.

[0074] In the embodiment of the present invention, an isolation valve and a regulating valve are provided on the user load side of the high-temperature gas-cooled reactor. The main function of the isolation valve is to isolate the user load from the main system. The isolation valve feeds back the load status. When a problem occurs in a certain user load, its corresponding isolation valve is locked and closed and fed back to the system, indicating that the user load has been lost and generating a load loss signal.

[0075] By feeding back the load status through the isolation valve, when an abnormality occurs in the user load, the isolation valve is locked and closed to effectively prevent the abnormal condition from affecting the safe operation of the reactor. The feedback mechanism of the isolation valve effectively improves the monitoring efficiency of load loss.

[0076] Step S202, monitoring the main steam pressure value and generating a main steam pressure signal according to the main steam pressure value.

[0077] Specifically, the above step S202 includes:

[0078] Step S2021, collecting the main steam header pressure value by using at least three pressure gauges.

[0079] Step S2022, if the number of pressure gauges is three, performing a median selection operation on the three collected main steam header pressure values to obtain the main steam pressure value.

[0080] Step S2023, if the number of pressure gauges is four, performing a two-out-of-four operation on the four collected main steam header pressure values to obtain the main steam pressure value.

[0081] Step S2024, if the main steam pressure value exceeds the preset pressure threshold, generating a main steam pressure high signal.

[0082] Step S2025, if the main steam pressure value does not exceed the preset pressure threshold, generating a main steam pressure non-high signal.

[0083] In the embodiment of the present invention, the main steam header pressure value is collected by using pressure gauges. Generally, the number of pressure gauges is three or more.

[0084] If the number of pressure gauges is three, performing a median selection operation on the three collected main steam header pressure values to obtain the main steam pressure value.

[0085] Specifically, the middle value of the three main steam header pressure values collected is determined as the main steam pressure value, and the maximum and minimum values are ignored.

[0086] When the number of pressure gauges is four, a two-out-of-four operation is performed on the four main steam header pressure values collected.

[0087] Specifically, the four main steam header pressure values collected are sorted in ascending order, the second and third values are used as valid values, the average of the two valid values is calculated, and the result obtained is determined as the main steam pressure value. It is preset that the main steam pressure during normal operation is P. When the actual pressure P′≥P + 2 MPa, a high main steam pressure signal is generated. When the actual pressure P′≤P + 0.5 MPa, a non-high main steam pressure signal is generated. Here is only an example and not a limitation. The high and low pressure setting values can be set according to the actual application scenario.

[0088] By performing a middle-of-three or two-out-of-four operation on the main steam header pressure values collected by the pressure gauges to calculate the main steam pressure value, it is ensured that a relatively accurate main steam pressure value can still be obtained when a certain pressure gauge fails, improving the reliability of the main steam pressure value. The main steam pressure value is compared with a preset pressure threshold to quickly judge the main steam pressure signal, so as to perform transient control in a timely manner when a high main steam pressure signal appears.

[0089] Step S203: Monitor the state of the bypass valve and generate a bypass valve opening / closing signal according to the state of the bypass valve.

[0090] Specifically, the above step S203 includes:

[0091] Step S2031: Monitor the actual closing signal of the bypass valve, and use the signal after delaying the actual closing signal of the bypass valve as the trigger signal for the bypass valve closing signal.

[0092] In the embodiment of the present invention, in order to more truly reflect the state of the bypass valve, the signal 3 s after delaying the actual closing signal of the bypass valve is selected as the trigger signal for the bypass valve closing signal, and at the same time, it can also avoid the triggering of the RB signal caused by the slow opening of the bypass valve under transient conditions.

[0093] It should be noted that the delay time can be set according to the actual application scenario. Here is only an example and not a limitation.

[0094] Step S204: When the load loss signal, high main steam pressure signal, and bypass valve closing signal are monitored simultaneously, trigger the RB logic and control the unit power to decrease to the target power setting value at a preset power reduction rate.

[0095] For details, please refer to Figure 1 Step S104 of the embodiment shown, which will not be elaborated here.

[0096] Step S205: When it is monitored that the unit power drops to the target power set value, or it is monitored that the main steam pressure value stabilizes within the preset pressure range, the RB logic is automatically reset.

[0097] For details, please refer to Figure 1 Step S105 of the illustrated embodiment, which will not be elaborated here.

[0098] The transient control method for a high-temperature gas-cooled reactor provided in this embodiment uses the signal after delaying the actual closing signal of the bypass valve as the trigger signal for the bypass valve closing signal, avoiding the situation where the RB logic is triggered due to the slow opening of the bypass valve under transient conditions, and improving the stability of the system.

[0099] The main steam parameters of the high-temperature gas-cooled reactor are higher than those of the traditional pressurized water reactor, and it has multiple application scenarios such as industrial park heating, electrolytic hydrogen production, and industrial heating. Therefore, the pure power generation mode of the high-temperature gas-cooled reactor is no longer the optimal configuration, and it is urgent to develop a multi-scenario mode.

[0100] In this embodiment, a multi-scenario application method for a high-temperature gas-cooled reactor is provided. Figure 3 It is a flowchart of the multi-scenario application method for a high-temperature gas-cooled reactor according to an embodiment of the present invention. As Figure 3 shown, this process further includes the following steps:

[0101] Step S301: Identify the current scenario application mode of the high-temperature gas-cooled reactor.

[0102] In the embodiment of the present invention, the scenario application mode includes at least one scenario combination of steam turbine generator power generation and steam turbine generator power generation with scenarios such as SOEC (Solid Oxide Electrolyzer Cell) hydrogen production, molten salt energy storage, heating, and heating. Among them, the steam turbine generator is a mandatory scenario, and the remaining scenarios can be added according to user needs.

[0103] If the secondary circuit user has an electric heater, its capacity needs to consider the unit peak shaving demand. For example, the capacities of the molten salt energy storage electric heater and the SOEC electric heater need to consider the unit rapid peak shaving demand to achieve the peak shaving capacity of the high-temperature gas-cooled reactor.

[0104] The specific application scenarios are as follows:

[0105] Scenario 1: Normal power generation mode, only the steam turbine generator set is put into operation.

[0106] As Figure 4As shown, during normal operation, the condensate pump transports the condensate in the condenser to the deaerator. After deaeration, it is transported to the steam generator (SG) by the main feed pump for heat exchange. After the feed water is heated, it becomes superheated steam, which is transported to the steam turbine generator to do work, completing the nuclear energy - electrical energy conversion. After the steam condenses, it returns to the condenser to achieve the cycle.

[0107] Scenario 2: Power generation + SOEC hydrogen production

[0108] A part of the steam is continuously heated by the electric heater 1 to increase the steam temperature for SOEC hydrogen production. The steam turbine generator operates normally, and demineralized water is supplied to the condenser through the demineralized water tank.

[0109] Scenario 3: Power generation + molten salt energy storage

[0110] 1. Put into operation the molten salt heat exchanger to heat a part of the steam with molten salt to achieve energy storage;

[0111] 2. Do not put into operation the molten salt heat exchanger, and directly put into operation the electric heater 2 of the molten salt energy storage device for heat storage.

[0112] Neither of the two methods reduces the reactor power, and the peak shaving function can be achieved. After the peak shaving is over, the electric heater can be withdrawn, and the water in the deaerator is heated through the heat exchanger to supply the auxiliary steam header, and then supplied to each user to achieve heat release.

[0113] Scenario 4: Power generation + heat supply

[0114] When heat sources are needed in industrial parks or heating users, a part of the steam is introduced, and the condensate returns to the condenser.

[0115] Scenario 5: Power generation + SOEC + molten salt energy storage + heat supply + heating

[0116] The steam turbine generator set, SOEC, molten salt energy storage, heat supply, and heating users are all put into operation.

[0117] The above 5 types of user loads of the high - temperature reactor can achieve various permutations and combinations. Only relatively common scenarios are listed in this embodiment.

[0118] Step S302, in the current scenario operation mode, use the transient control method for high - temperature gas - cooled reactors as described in the above - mentioned embodiment to perform transient control on the high - temperature gas - cooled reactor.

[0119] In the embodiment of the present invention, the multi - scenario control of the high - temperature gas - cooled reactor is as follows:

[0120] Condition 1: Taking the inavailability of the condenser as an example for control description:

[0121] The user capacity is as follows: the rated power of the reactor is 200 MW, the capacity of the steam turbine generator is 100 MWe (since other loads are not always in operation, the steam turbine load is selected at 100% capacity, i.e., it can take away all the reactor heat. If the industrial heating or SOEC load is always in operation, the steam turbine load can be reduced), the SOEC load is 20 MW, the molten salt energy storage is 60 MW, the maximum industrial heat is 60 MW, and the heating is 10 MW.

[0122] The operating parameters are as follows: the main steam pressure is 11 MPa, the control set value of the bypass valve is 11.5 MPa, the control set value of the atmospheric relief valve is 13 MPa., and the condenser is in a vacuum state.

[0123] Initial condition:

[0124] Initial state: The reactor operates only with the steam turbine at 200 MW, the unit is in coordinated control, and the SOEC, molten salt energy storage, heating, and heating are not in operation.

[0125] Transient process:

[0126] (1) When the circulating water supply is cut off, the vacuum in the condenser rises rapidly, the steam turbine is protected and tripped, the main steam valve closes, and a signal of steam turbine load loss is generated.

[0127] (2) The main steam pressure rises, the bypass valve is adjusted to open, the vacuum rises faster, reaches the locked bypass valve set value, and the bypass valve is protected and closed.

[0128] (3) The main steam pressure rises rapidly to the high set value, and both the superimposed load loss signal and the bypass valve closed signal exist, triggering the RB logic.

[0129] (4) The target value of RB: Since the SOEC, molten salt energy storage, heating, and heating are not in operation, the calculated target load value is 0, but the minimum value is not less than 30% of the RFP. Therefore, the RB target value is 30% of the RFP, which is 60 MW.

[0130] (5) The coordinated control system automatically reduces the feed water flow, inserts the control rods, and reduces the speed of the main helium blower to quickly reduce the reactor power.

[0131] (6) During the power reduction process, if the main steam pressure continues to rise and reaches the opening set value of the atmospheric relief valve, the main steam pressure is controlled through the atmospheric relief valve.

[0132] (7) After the reactor power is reduced to 60 MW, the RB logic resets. However, at this time, the loads of the primary and secondary loops are still mismatched, and the main steam pressure is still relatively high. The operator can manually put into operation the molten salt energy storage users (optional) to achieve a new balance between the primary and secondary loops. During this period, since the protection of the helium-water flow ratio between the primary and secondary loops below 30% RFP is not in effect, it is beneficial for the operator's manual operation. It is also possible to further reduce the reactor power according to the requirements of subsequent users to achieve a new steady state.

[0133] Condition 2: All users are put into operation

[0134] Initial state: The reactor is operating at 200 MW with a turbo-generator, the unit is in coordinated control, and SOEC, molten salt energy storage, heat supply, and heating are all in operation.

[0135] (1) In the event of a vacuum loss condition, after the steam turbine trips and the bypass valve opens, it is locked and closed.

[0136] (2) The RB logic is triggered, and the target load is 20 MW of SOEC load + 60 MW of molten salt energy storage + 60 MW of industrial heat + 10 MW of heating = 150 MW.

[0137] (3) The reactor quickly reduces its power to the target load of 150 MW.

[0138] (4) If the molten salt energy storage is saturated and needs to be cut off at this time, close the molten salt energy storage valve, the main steam pressure rises, and the RB logic will take effect again, with a target load of 90 MW.

[0139] Condition 3: Peak shaving condition

[0140] In this condition, SOEC or molten salt energy storage users need to be put into operation. When the power grid issues a load reduction command, the steam turbine control valve closes, increasing the power of the molten salt energy storage or SOEC electric heater for load distribution. When the power grid needs the power plant to increase the load, the power of the molten salt energy storage or SOEC electric heater can be reduced to achieve an increase in the load on the steam turbine generator side, meeting the overall peak shaving requirements of the power grid. The reactor can maintain its current power unchanged, which is beneficial to the safe and stable operation of the reactor and indirectly improves the overall operation flexibility of the high-temperature reactor.

[0141] In addition, during the heat release stage of the molten salt energy storage, heat can also be released to heat the feed water into steam for the auxiliary steam header. The steam from the auxiliary steam header can be used for the deaerator, shaft seal, and in-plant heating, etc., realizing the reuse of heat, improving the safety of the unit, and also having economic benefits.

[0142] The multi-scenario application method for a high-temperature gas-cooled reactor provided in this embodiment performs transient control on the high-temperature gas-cooled reactor by using the transient control method of the high-temperature gas-cooled reactor in multiple scenarios, meeting the multi-scenario application of the high-temperature gas-cooled reactor.

[0143] In this embodiment, a transient control device for a high-temperature gas-cooled reactor is further provided. This device is used to implement the above embodiments and preferred implementation manners, and those that have been described will not be repeated. As used hereinafter, the term "module" can be a combination of software and / or hardware that realizes a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0144] This embodiment provides a transient control device for a high-temperature gas-cooled reactor, as Figure 5 shown, including:

[0145] The first monitoring module 501 is used to monitor the load loss signal on the user load side of the high-temperature gas-cooled reactor.

[0146] The second monitoring module 502 is used to monitor the main steam pressure value and generate a main steam pressure signal according to the main steam pressure value. The main steam pressure signal includes a main steam pressure high signal and a main steam pressure non-high signal.

[0147] The third monitoring module 503 is used to monitor the bypass valve state and generate a bypass valve switch signal according to the bypass valve state. The bypass valve switch signal includes a bypass valve opening signal and a bypass valve closing signal.

[0148] The first control module 504 is used to trigger the RB logic when the load loss signal, the main steam pressure high signal, and the bypass valve closing signal are simultaneously monitored, and control the unit power to decrease to the target power setting value according to a preset power reduction rate.

[0149] The reset module 505 is used to automatically reset the RB logic when it is monitored that the unit power has decreased to the target power setting value, or when it is monitored that the main steam pressure value is stable within a preset pressure range.

[0150] In some optional implementation manners, the first monitoring module 501 includes:

[0151] An acquisition unit is used to acquire the load status feedback by the isolation valve provided on the user load side of the high-temperature gas-cooled reactor.

[0152] The first signal generation unit is used to lock and close the isolation valve and generate a load loss signal when an abnormality occurs in the user load.

[0153] In some optional implementation manners, the second monitoring module 502 includes:

[0154] An acquisition unit is used to acquire the main steam header pressure value by using at least three pressure gauges.

[0155] The first calculation unit is configured to, if the number of pressure gauges is three, perform a median-of-three operation on the three collected main steam header pressure values to obtain the main steam pressure value.

[0156] The second calculation unit is configured to, if the number of pressure gauges is four, perform a two-of-four operation on the four collected main steam header pressure values to obtain the main steam pressure value.

[0157] The second signal generation unit is configured to generate a main steam pressure high signal if the main steam pressure value exceeds a preset pressure threshold.

[0158] The third signal generation unit is configured to generate a main steam pressure not high signal if the main steam pressure value does not exceed the preset pressure threshold.

[0159] In some alternative embodiments, the third monitoring module 503 includes:

[0160] The triggering unit is configured to monitor the actual bypass valve closing signal and use the signal after delaying the actual bypass valve closing signal as the triggering signal for the bypass valve closing signal.

[0161] In this embodiment, there is also provided a multi-scenario application device for a high-temperature gas-cooled reactor. This device is used to implement the above embodiments and preferred implementation manners, and those that have been described will not be repeated. As used hereinafter, the term "module" may be a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0162] This embodiment also provides a multi-scenario application device for a high-temperature gas-cooled reactor, as Figure 6 shown, including:

[0163] The scenario recognition module 601 is configured to recognize the current scenario application mode of the high-temperature gas-cooled reactor, and the scenario application mode includes at least one scenario combination of steam turbine generator power generation and steam turbine generator power generation with SOEC hydrogen production, molten salt energy storage, heat supply, and heating.

[0164] The second control module 602 is configured to perform transient control on the high-temperature gas-cooled reactor using the transient control method for the high-temperature gas-cooled reactor as described above in the current scenario application mode.

[0165] The further function descriptions of the above various modules and units are the same as those in the corresponding above embodiments, and will not be repeated here.

[0166] The multi-scenario application device for a high-temperature gas-cooled reactor in this embodiment is presented in the form of functional units. Here, the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and a memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0167] An embodiment of the present invention further provides a computer device having the above Figure 5 shown transient control device for a high-temperature gas-cooled reactor, or Figure 6 shown multi-scenario application device for a high-temperature gas-cooled reactor.

[0168] Please refer to Figure 7 , Figure 7 which is a schematic structural diagram of a computer device provided by an alternative embodiment of the present invention. As Figure 7 shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Each component communicates with each other using different buses and can be installed on a common motherboard or installed in other ways as needed. The processor can process instructions executed within the computer device, including instructions stored in the memory or on the memory to display graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some alternative embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a set of blade servers, or a multi-processor system). Figure 7 In

[0169] FIG. 16, one processor 10 is taken as an example.

[0170] The memory 20 stores instructions executable by at least one processor 10, so that at least one processor 10 executes the method shown in the above embodiments.

[0171] The memory 20 may include a program storage area and a data storage area. The program storage area may store an operating system and application programs required for at least one function. The data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some alternative embodiments, the memory 20 may optionally include a memory remotely disposed relative to the processor 10, and these remote memories may be connected to the computer device through a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0172] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk, or a solid-state drive; the memory 20 may further include a combination of the above types of memories.

[0173] The computer device further includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30, and the output device 40 may be connected through a bus or other means. Figure 7 Taking the connection through the bus as an example.

[0174] The input device 30 may receive input digital or character information, and generate key signal inputs related to the user settings and function controls of the computer device, such as a touch screen, etc. The output device 40 may include a display device, etc.

[0175] The embodiment of the present invention further provides a computer-readable storage medium. The method according to the embodiment of the present invention may be implemented in hardware, firmware, or may be implemented as computer code that can be recorded on a storage medium, or may be implemented as computer code originally stored in a remote storage medium or a non-transitory machine-readable storage medium and downloaded through a network and will be stored in a local storage medium, so that the method described herein may be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium may be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk, or a solid-state drive, etc.; further, the storage medium may further include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code, and when the software or computer code is accessed and executed by the computer, the processor, or the hardware, the method shown in the above embodiment is implemented.

[0176] A part of the present invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the present invention through the operations of the computer. Those skilled in the art should understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executes the instructions, or the computer compiles the instructions and then executes the corresponding compiled program, or the computer reads and executes the instructions, or the computer reads and installs the instructions and then executes the corresponding installed program. Herein, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to the computer.

[0177] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope of this application.

Claims

1. A transient control method for a high temperature gas-cooled reactor, characterized in that: The method comprises: Monitor the load loss signal on the user load side of the high temperature gas-cooled reactor; Monitoring the main steam pressure value, and generating a main steam pressure signal according to the main steam pressure value, wherein the main steam pressure signal includes a main steam pressure high signal and a main steam pressure non-high signal; Monitoring the bypass valve state, and generating a bypass valve switch signal according to the bypass valve state, wherein the bypass valve switch signal includes a bypass valve opening signal and a bypass valve closing signal; When the load loss signal, the main steam pressure high signal and the bypass valve closing signal are monitored simultaneously, the RB logic is triggered to control the unit power to be reduced to the target power setting value according to the preset power reduction rate; When the unit power is monitored to be reduced to the target power setting value, or the main steam pressure value is monitored to be stable within the preset pressure range, the RB logic is automatically reset.

2. The method according to claim 1, characterized in that The monitoring of the load loss signal on the user load side of the high temperature gas-cooled reactor includes: Obtain the load status fed back by the isolation valve set on the user load side of the high temperature gas-cooled reactor; When the user load is abnormal, the isolation valve is locked and closed, and a load loss signal is generated.

3. The method according to claim 1, characterized in that Generating a main steam pressure signal according to the main steam pressure value comprises: Use at least three pressure gauges to collect the main steam main pipe pressure value; If there are three pressure gauges, perform a three-mean operation on the three main steam main pipe pressure values ​​collected to obtain the main steam pressure value; If there are four pressure gauges, the four main steam main pipe pressure values ​​collected are divided by two to obtain the main steam pressure value; If the main steam pressure value exceeds a preset pressure threshold, a main steam pressure high signal is generated; If the main steam pressure value does not exceed the preset pressure threshold, a main steam pressure non-high signal is generated.

4. The method according to claim 1, characterized in that: Generating a bypass valve switch signal according to the bypass valve state includes: The actual closing signal of the bypass valve is monitored, and a delayed signal of the actual closing signal of the bypass valve is used as a trigger signal of the closing signal of the bypass valve.

5. A multi-scenario application method for a high temperature gas-cooled reactor, characterized in that: The method comprises: Identify the current scenario application mode of the high temperature gas-cooled reactor, wherein the scenario application mode includes steam turbine generator power generation and at least one scenario combination of steam turbine generator power generation and SOEC hydrogen production, molten salt energy storage, heat supply, and heating; In the current scenario application mode, the high temperature gas-cooled reactor is transiently controlled using the transient control method for a high temperature gas-cooled reactor as described in any one of claims 1 to 4.

6. A transient control device for a high temperature gas-cooled reactor, characterized in that: The device comprises: The first monitoring module is used to monitor the load loss signal of the user load side of the high temperature gas-cooled reactor; A second monitoring module, used for monitoring the main steam pressure value, and generating a main steam pressure signal according to the main steam pressure value, wherein the main steam pressure signal includes a main steam pressure high signal and a main steam pressure non-high signal; A third monitoring module, used to monitor the bypass valve state and generate a bypass valve switch signal according to the bypass valve state, wherein the bypass valve switch signal includes a bypass valve opening signal and a bypass valve closing signal; The first control module is used to trigger the RB logic when the load loss signal, the main steam pressure high signal and the bypass valve closing signal are monitored simultaneously, and control the unit power to be reduced to the target power setting value according to the preset power reduction rate; The reset module is used to automatically reset the RB logic when it is monitored that the unit power is reduced to the target power setting value, or when it is monitored that the main steam pressure value is stable within the preset pressure range.

7. A multi-scenario application device for a high temperature gas-cooled reactor, characterized in that: The device comprises: A scene recognition module is used to identify the current scene application mode of the high temperature gas-cooled reactor, wherein the scene application mode includes steam turbine generator power generation and at least one scene combination of steam turbine generator power generation and SOEC hydrogen production, molten salt energy storage, heating, and heating; The second control module is used to perform transient control on the high temperature gas-cooled reactor in the current scene operation mode by using the transient control method for the high temperature gas-cooled reactor according to any one of claims 1 to 4.

8. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the transient control method for a high temperature gas-cooled reactor according to any one of claims 1 to 4, or the multi-scenario application method for a high temperature gas-cooled reactor according to claim 5, by executing the computer instructions.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, which are used to enable a computer to execute the transient control method for a high-temperature gas-cooled reactor as described in any one of claims 1 to 4, or the multi-scenario application method for a high-temperature gas-cooled reactor as described in claim 5.

10. A computer program product, characterized in that It includes computer instructions, which are used to cause a computer to execute the transient control method for a high temperature gas-cooled reactor according to any one of claims 1 to 4, or the multi-scenario application method for a high temperature gas-cooled reactor according to claim 5.

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