CN117095842A - Nuclear power unit system - Google Patents

Nuclear power unit system Download PDF

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Publication number
CN117095842A
CN117095842A CN202310596623.9A CN202310596623A CN117095842A CN 117095842 A CN117095842 A CN 117095842A CN 202310596623 A CN202310596623 A CN 202310596623A CN 117095842 A CN117095842 A CN 117095842A
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pressure
deaerator
pressure transmitter
transmitter
nuclear power
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马成喜
夏云
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China Power Engineering Consulting Group East China Electric Power Design Institute Co Ltd
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China Power Engineering Consulting Group East China Electric Power Design Institute Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/003Arrangements for testing or measuring
    • GPHYSICS
    • G21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21CNUCLEAR REACTORS
    • G21C17/00Monitoring; Testing ; Maintaining
    • GPHYSICS
    • G21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21CNUCLEAR REACTORS
    • G21C17/00Monitoring; Testing ; Maintaining
    • G21C17/003Remote inspection of vessels, e.g. pressure vessels

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Turbines (AREA)

Abstract

本发明提供一种核电机组系统包括:高压缸;除氧器,用于通过高压缸输出的蒸汽对进入除氧器的凝结水进行除氧处理;主蒸汽系统,用于给除氧器提供第一辅助蒸汽;辅助蒸汽系统,用于给除氧器提供第二辅助蒸汽,以使除氧器运行在空负荷定压运行工况;压力检测模块,用于获取除氧器的压力;一阶滞后模块,用于根据除氧器的压力判断核电机组的汽轮机发生甩负荷工况时发出触发信号;调节模块,用于在接收到触发信号时使除氧器的压力维持在甩负荷前的压力预设时间后以预设速率下降。本发明引入一阶惯性滤波模块,从而可以精准识别除氧器压力变化,进而可以精准检测出汽轮机的甩负荷工况,保障除氧器的压力稳定,有利于核电机组的长期稳定运行。

The present invention provides a nuclear power unit system including: a high-pressure cylinder; a deaerator, used to deoxygenate the condensed water entering the deaerator through the steam output by the high-pressure cylinder; and a main steam system, used to provide the deaerator with a third An auxiliary steam; an auxiliary steam system, used to provide the second auxiliary steam to the deaerator, so that the deaerator can operate under a no-load constant pressure operating condition; a pressure detection module, used to obtain the pressure of the deaerator; first-stage The hysteresis module is used to determine based on the pressure of the deaerator to send a trigger signal when the load shedding condition occurs in the steam turbine of the nuclear power unit; the adjustment module is used to maintain the pressure of the deaerator at the pressure before load shedding when the trigger signal is received. Decreases at a preset rate after a preset time. The present invention introduces a first-order inertial filter module, so that the pressure change of the deaerator can be accurately identified, and the load shedding condition of the steam turbine can be accurately detected, ensuring the pressure stability of the deaerator, which is beneficial to the long-term stable operation of the nuclear power unit.

Description

核电机组系统Nuclear power unit system

技术领域Technical field

本发明涉及核电机组领域,具体涉及一种核电机组系统。The invention relates to the field of nuclear power units, and in particular to a nuclear power unit system.

背景技术Background technique

核电机组在运行过程中,由于外电网、主机或辅机系统故障,难免发生机组负荷速降工况,即甩负荷工况,核电机组负荷速降往往导致除氧器压力迅速下降。除氧器压力的下降会导致主给水不能被继续加热,当机组故障排除后,机组不能快速恢复到原负荷工况继续运行。During the operation of a nuclear power unit, due to the failure of the external power grid, main engine or auxiliary system, the unit load drop condition will inevitably occur, that is, the load shedding condition. The load drop of the nuclear power unit often leads to a rapid drop in the deaerator pressure. The drop in deaerator pressure will cause the main feed water to be unable to continue to be heated. After the unit fault is eliminated, the unit cannot quickly return to the original load condition and continue to operate.

目前普遍采用汽轮机停机信号、反应堆停堆信号、汽轮机孤岛运行等多种信号的复杂组合来识别甩负荷工况,该方案能识别出某些机组大范围甩负荷的工况,却不能精准检测出不触发汽轮机停机、反应堆停堆及汽轮机孤岛运行以外的其他机组快速降负荷工况导致汽轮机出现甩负荷工况,因而不能保障除氧器在这些工况下的压力稳定,不利于核电机组的长期稳定运行。At present, a complex combination of steam turbine shutdown signals, reactor shutdown signals, steam turbine islanding operation and other signals is commonly used to identify load shedding conditions. This solution can identify the large-scale load shedding conditions of some units, but it cannot accurately detect the load shedding conditions. Rapid load reduction of other units other than turbine shutdown, reactor shutdown, and turbine island operation will not trigger load shedding conditions in the steam turbine. Therefore, the pressure stability of the deaerator under these conditions cannot be guaranteed, which is not conducive to the long-term stability of the nuclear power unit. Stable operation.

发明内容Contents of the invention

为解决上述技术问题,本发明的目的在于提出一种核电机组系统,可以精准检测出汽轮机的甩负荷工况,保障除氧器的压力稳定,有利于核电机组的长期稳定运行。In order to solve the above technical problems, the purpose of the present invention is to propose a nuclear power unit system that can accurately detect the load shedding condition of the steam turbine, ensure the pressure stability of the deaerator, and is conducive to the long-term stable operation of the nuclear power unit.

本发明采用的技术方案如下:The technical solutions adopted by the present invention are as follows:

本发明的实施例提出了一种核电机组系统包括:高压缸;除氧器,通过第一调节阀与所述高压缸的排气口相连,用于通过所述高压缸输出的蒸汽对进入除氧器的凝结水进行除氧处理;主蒸汽系统,通过第二调节阀与所述除氧器连接,用于给所述除氧器提供第一辅助蒸汽,实现甩负荷工况下保持除氧器压力稳定;辅助蒸汽系统,通过第三调节阀与所述除氧器连接,用于通过所述第三调节阀给所述除氧器提供第二辅助蒸汽,以使所述除氧器运行在空负荷定压运行工况;压力检测模块,设置在所述除氧器上,用于获取除氧器的压力;一阶滞后模块,用于根据所述除氧器的压力判断所述核电机组的汽轮机是否发生甩负荷工况,并在判断所述汽轮机发生甩负荷工况时发出触发信号;调节模块,用于在接收到所述触发信号时对所述第二调节阀进行控制,以使所述除氧器的压力维持在甩负荷前的压力预设时间后以预设速率下降。The embodiment of the present invention proposes a nuclear power unit system including: a high-pressure cylinder; and a deaerator, which is connected to the exhaust port of the high-pressure cylinder through a first regulating valve, and is used for steam output by the high-pressure cylinder to enter the deaerator. The condensed water of the oxygenator is deoxidized; the main steam system is connected to the deaerator through a second regulating valve and is used to provide the first auxiliary steam to the deaerator to maintain deoxidation under load shedding conditions. The pressure of the deaerator is stable; the auxiliary steam system is connected to the deaerator through the third regulating valve, and is used to provide the second auxiliary steam to the deaerator through the third regulating valve to make the deaerator operate. In the no-load constant pressure operating condition; a pressure detection module is provided on the deaerator to obtain the pressure of the deaerator; a first-order hysteresis module is used to determine the nuclear power plant based on the pressure of the deaerator Whether the steam turbine of the unit is in a load-shedding condition, and sends a trigger signal when it is determined that the steam turbine is in a load-shedding condition; the regulating module is used to control the second regulating valve when receiving the trigger signal to control the second regulating valve. The pressure of the deaerator is maintained at the pressure before load shedding for a preset time and then decreases at a preset rate.

另外,根据本发明提出的核电机组系统还可以具有如下附加的技术特征:In addition, the nuclear power unit system proposed according to the present invention may also have the following additional technical features:

根据本发明的一个实施例,所述压力检测模块包括第一压力变送器、第二压力变送器和第三压力变送器,所述压力检测模具体用于:当所述第一压力变送器、所述第二压力变送器和所述第三压力变送器均无故障时,根据所述第一压力变送器、第二压力变送器和第三压力变送器检测到的压力的中值获取所述除氧器的压力;当所述第一压力变送器、所述第二压力变送器和所述第三压力变送器中的任意一个压力变送器发生故障时,根据未发生故障的两个压力变送器检测到的压力的平均值获取所述除氧器的压力;当所述第一压力变送器、所述第二压力变送器和所述第三压力变送器中的任意两个压力变送器发生故障时,根据未发生故障的压力变送器检测到的压力获取所述除氧器的压力;当所述第一压力变送器、所述第二压力变送器和所述第三压力变送器均发生故障时,根据所述第一压力变送器、所述第二压力变送器和所述第三压力变送器中最后检测到的有效值获取所述除氧器的压力。通过设置三个压力变送器能够避免单个压力变送器故障导致无法获得除氧器的压力,从而可以持续稳定地获得除氧器的压力。According to an embodiment of the present invention, the pressure detection module includes a first pressure transmitter, a second pressure transmitter and a third pressure transmitter, and the pressure detection module is specifically used to: when the first pressure When the transmitter, the second pressure transmitter and the third pressure transmitter are all faultless, the first pressure transmitter, the second pressure transmitter and the third pressure transmitter detect The pressure of the deaerator is obtained from the median value of the pressure; when any one of the first pressure transmitter, the second pressure transmitter and the third pressure transmitter When a fault occurs, the pressure of the deaerator is obtained based on the average of the pressures detected by the two pressure transmitters that have not failed; when the first pressure transmitter, the second pressure transmitter and When any two pressure transmitters in the third pressure transmitter fail, the pressure of the deaerator is obtained based on the pressure detected by the pressure transmitter that has not failed; when the first pressure transmitter fails, the pressure of the deaerator is obtained. When the transmitter, the second pressure transmitter and the third pressure transmitter all fail, according to the first pressure transmitter, the second pressure transmitter and the third pressure transmitter, The pressure of the deaerator is obtained from the last effective value detected in the transmitter. By setting up three pressure transmitters, it is possible to avoid failure of a single pressure transmitter causing the deaerator pressure to be unobtainable, so that the deaerator pressure can be obtained continuously and stably.

根据本发明的一个实施例,根据以下公式获取所述一阶滞后模块的传递函数:其中,τ为滤波时间,s为变量。一阶滞后模块基于传递函数对除氧器的压力进行计算,能够较好地抑制除氧器压力信号的周期性干扰信号,获得的除氧器的压力数值准确,适用于除氧器的压力波动频率较高的场合。According to an embodiment of the present invention, the transfer function of the first-order lag module is obtained according to the following formula: Among them, τ is the filtering time and s is the variable. The first-order lag module calculates the pressure of the deaerator based on the transfer function, which can better suppress the periodic interference signal of the deaerator pressure signal. The obtained pressure value of the deaerator is accurate and suitable for the pressure fluctuation of the deaerator. Higher frequency occasions.

根据本发明的一个实施例,τ=10s。当滤波时间设置为10s时,一阶滞后模块能够适应除氧器压力快速变化,其滤波结果能及时输出,灵敏度较高,还能防止过于灵敏不能有效滤除干扰而造成误识别甩负荷工况的发生。According to an embodiment of the invention, τ=10s. When the filtering time is set to 10s, the first-order lag module can adapt to rapid changes in deaerator pressure, and its filtering results can be output in time with high sensitivity. It can also prevent misidentification of load shedding conditions due to being too sensitive and unable to effectively filter out interference. happened.

根据本发明的一个实施例,所述一阶滞后模块具体用于:当检测到除氧器的压力降低速率达到80KPa/10s或者压力阶跃下降80KPa时,判断所述汽轮机发生甩负荷工况。According to an embodiment of the present invention, the first-order hysteresis module is specifically used to determine that the steam turbine is in a load shedding condition when it is detected that the pressure reduction rate of the deaerator reaches 80KPa/10s or the pressure step drops by 80KPa.

根据本发明的一个实施例,所述调节模块具体包括:给定函数发生器,用于在接收到所述触发信号时,根据甩负荷前除氧器的压力生成保压曲线,所述保压曲线的压力变化为:先以甩负荷前除氧器的压力保持300秒,再以0.1MPa/min降为0;PID调节器(ProportionIntegration Differentiation,比例-积分-微分调节器),用于根据所述保压曲线对所述第二调节阀进行控制,以使所述除氧器的压力以保压曲线进行变化。在汽轮机发生甩负荷工况时,通过给定函数发生器和PID调节器按照保压曲线控制除氧器的压力变化,能够有效避免辅助蒸汽系统安全阀因为用气量突然减小而超压打开,保障除氧器安全运行。According to an embodiment of the present invention, the adjustment module specifically includes: a given function generator, configured to generate a pressure maintaining curve based on the pressure of the deaerator before load shedding when the trigger signal is received. The pressure change of the curve is: first maintain the pressure of the deaerator before load shedding for 300 seconds, and then reduce it to 0 at 0.1MPa/min; PID regulator (ProportionIntegration Differentiation, proportional-integral-derivative regulator) is used according to the required The pressure maintaining curve controls the second regulating valve so that the pressure of the deaerator changes according to the pressure maintaining curve. When load shedding occurs in the steam turbine, the given function generator and PID regulator control the pressure change of the deaerator according to the pressure maintaining curve, which can effectively prevent the safety valve of the auxiliary steam system from opening over pressure due to a sudden reduction in gas consumption. Ensure the safe operation of the deaerator.

本发明的有益效果:Beneficial effects of the present invention:

根据本发明实施例的核电机组系统,通过压力检测模块获取除氧器的压力变化,设置一阶滞后模块根据除氧器的压力变化判断汽轮机是否发生甩负荷工况,并在甩负荷工况时通过调节模块控制除氧器的压力维持在甩负荷前的压力一段时间,由此,能够精准检测出汽轮机的甩负荷工况,保障除氧器的压力稳定,有利于核电机组的长期稳定运行。According to the nuclear power unit system of the embodiment of the present invention, the pressure change of the deaerator is obtained through the pressure detection module, and a first-order lag module is set to determine whether the load shedding condition occurs in the steam turbine according to the pressure change of the deaerator, and when the load shedding condition is The adjustment module controls the pressure of the deaerator to be maintained at the pressure before load shedding for a period of time. This allows the load shedding condition of the turbine to be accurately detected, ensuring the stability of the deaerator pressure, which is conducive to the long-term stable operation of the nuclear power unit.

附图说明Description of the drawings

图1为本发明实施例的核电机组系统的方框示意图;Figure 1 is a block diagram of a nuclear power unit system according to an embodiment of the present invention;

图2为本发明一个实施例的压力检测模块的方框示意图;Figure 2 is a block diagram of a pressure detection module according to an embodiment of the present invention;

图3为本发明一个实施例的保压曲线示意图。Figure 3 is a schematic diagram of a pressure holding curve according to an embodiment of the present invention.

具体实施方式Detailed ways

下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。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. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

如图1所示,本发明实施例的核电机组系统包括高压缸100、除氧器200、主蒸汽系统300、辅助蒸汽系统400、压力检测模块500、一阶滞后模块600、调节模块700、第一调节阀800、第二调节阀900和第三调节阀1000。其中,除氧器200通过第一调节阀800与高压缸100的排气口相连,除氧器200用于通过高压缸100输出的蒸汽对进入除氧器的凝结水进行除氧处理;主蒸汽系统300通过第二调节阀900与除氧器200连接,主蒸汽系统300用于给除氧器200提供第一辅助蒸汽,实现甩负荷工况下保持除氧器200压力稳定;辅助蒸汽系统400通过第三调节阀1000与除氧器200连接,辅助蒸汽系统400用于通过第三调节阀1000给除氧器200提供第二辅助蒸汽,以使除氧器200运行在空负荷定压运行工况;压力检测模块500设置在除氧器200上,压力检测模块500用于获取除氧器200的压力;一阶滞后模块600用于根据除氧器200的压力判断核电机组的汽轮机是否发生甩负荷工况,并在判断汽轮机发生甩负荷工况时发出触发信号;调节模块700用于在接收到触发信号时对第二调节阀900进行控制,以使除氧器200的压力维持在甩负荷前的压力预设时间后以预设速率下降。As shown in Figure 1, the nuclear power unit system according to the embodiment of the present invention includes a high-pressure cylinder 100, a deaerator 200, a main steam system 300, an auxiliary steam system 400, a pressure detection module 500, a first-order hysteresis module 600, an adjustment module 700, and a A regulating valve 800, a second regulating valve 900 and a third regulating valve 1000. Among them, the deaerator 200 is connected to the exhaust port of the high-pressure cylinder 100 through the first regulating valve 800. The deaerator 200 is used to deoxygenate the condensed water entering the deaerator through the steam output by the high-pressure cylinder 100; the main steam The system 300 is connected to the deaerator 200 through the second regulating valve 900. The main steam system 300 is used to provide the first auxiliary steam to the deaerator 200 to maintain a stable pressure of the deaerator 200 under load shedding conditions; the auxiliary steam system 400 The third regulating valve 1000 is connected to the deaerator 200, and the auxiliary steam system 400 is used to provide the second auxiliary steam to the deaerator 200 through the third regulating valve 1000, so that the deaerator 200 can operate at no load and constant pressure. The pressure detection module 500 is set on the deaerator 200, and the pressure detection module 500 is used to obtain the pressure of the deaerator 200; the first-order lag module 600 is used to determine whether the steam turbine of the nuclear power unit is spinning based on the pressure of the deaerator 200. load condition, and sends a trigger signal when it is judged that the load rejection condition occurs in the steam turbine; the adjustment module 700 is used to control the second control valve 900 when receiving the trigger signal, so that the pressure of the deaerator 200 is maintained at the load rejection level. The pressure in front decreases at a preset rate after a preset time.

具体地,第一调节阀可以为气动开关阀,除氧器200可以利用蒸汽把进入除氧器的凝结水进行加热、打散最终除去凝结水中的氧气,达到除氧的效果,蒸汽可以来自高压缸100、主蒸汽系统300和辅助蒸汽系统400。调节模块700可以对第二调节阀900和第三调节阀1000的开度进行控制,以利用辅助蒸汽根据实际需求对除氧器200的压力进行调节,维持除氧器的压力在设定的压力。当除氧器水位过高时,第二调节阀900和第三调节阀1000自动关闭,以防止汽轮机进水事故的发生。Specifically, the first regulating valve can be a pneumatic on-off valve, and the deaerator 200 can use steam to heat and disperse the condensate water entering the deaerator, and finally remove the oxygen in the condensate water to achieve the deoxygenation effect. The steam can come from high pressure. Cylinder 100, main steam system 300 and auxiliary steam system 400. The adjustment module 700 can control the opening of the second adjustment valve 900 and the third adjustment valve 1000 to use auxiliary steam to adjust the pressure of the deaerator 200 according to actual needs and maintain the pressure of the deaerator at a set pressure. . When the water level in the deaerator is too high, the second regulating valve 900 and the third regulating valve 1000 are automatically closed to prevent water intrusion accidents in the steam turbine.

如图1所示,根据核电机组系统汽轮机的不同工况,除氧器200的运行模式可以分为以下四种:As shown in Figure 1, according to the different working conditions of the steam turbine of the nuclear power unit system, the operation modes of the deaerator 200 can be divided into the following four types:

第一种运行模式:核电机组的汽轮机为空负荷工况时除氧器200定压运行。在汽轮机为空负荷工况时,在启动阶段利用辅助蒸汽系统400和第三调节阀1000为除氧器200提供第二辅助蒸汽,使除氧器200维持在压力一下定压运行。其中,压力一的参考值为0.12MPa(a),可根据具体情况进行调整。The first operation mode: when the steam turbine of the nuclear power unit is in no-load condition, the deaerator 200 operates at constant pressure. When the steam turbine is in no-load condition, during the startup phase, the auxiliary steam system 400 and the third regulating valve 1000 are used to provide the second auxiliary steam for the deaerator 200 to maintain the deaerator 200 operating at a constant pressure. Among them, the reference value of pressure one is 0.12MPa(a), which can be adjusted according to specific conditions.

第二种运行模式:核电机组的汽轮机为低负荷工况时除氧器200定压运行。当汽轮机负荷处于较低水平并逐渐升高时,利用主蒸汽系统300和稳压蒸汽调节阀,即第二调节阀900,为除氧器200提供第一辅助蒸汽,使除氧器200维持在压力二下定压运行。其中,压力二的参考值为0.17MPa(a),可根据具体情况进行调整。The second operating mode: when the steam turbine of the nuclear power unit is in low load condition, the deaerator 200 operates at a constant pressure. When the steam turbine load is at a low level and gradually increases, the main steam system 300 and the steady-pressure steam regulating valve, that is, the second regulating valve 900, are used to provide the first auxiliary steam for the deaerator 200 to maintain the deaerator 200 at Run at constant pressure under pressure 2. Among them, the reference value of pressure two is 0.17MPa(a), which can be adjusted according to specific conditions.

第三种运行模式:核电机组的汽轮机为正常运行工况时除氧器200滑压运行。当汽轮机正常运行时,如果高压缸100至除氧器200的排汽压力大于压力二,除氧器200可对高压缸100输出的蒸汽进行除氧处理,除氧器200还可通过第一调节阀800向高压缸100排汽供汽,从而实现除氧器200根据高压缸100至除氧器200的排汽压力滑压运行。其中,高压缸100至除氧器200的排汽压力(除氧器的压力)是汽轮机负荷的函数,由一阶滞后模块600根据除氧器的压力实时计算负荷变化情况,以此判断是否发生甩负荷工况。The third operating mode: when the steam turbine of the nuclear power unit is in normal operating conditions, the deaerator 200 operates under sliding pressure. When the steam turbine is operating normally, if the exhaust steam pressure from the high-pressure cylinder 100 to the deaerator 200 is greater than pressure 2, the deaerator 200 can deoxygenate the steam output from the high-pressure cylinder 100, and the deaerator 200 can also pass the first adjustment The valve 800 supplies exhaust steam to the high-pressure cylinder 100 so that the deaerator 200 can operate according to the exhaust steam pressure from the high-pressure cylinder 100 to the deaerator 200 . Among them, the exhaust pressure from the high-pressure cylinder 100 to the deaerator 200 (the pressure of the deaerator) is a function of the turbine load. The first-order lag module 600 calculates the load change in real time according to the pressure of the deaerator to determine whether it occurs. Load shedding conditions.

第四种运行模式:核电机组的汽轮机为甩负荷工况时除氧器200进行压力控制。当汽轮机出现甩负荷时,通过调节模块700控制第二调节阀900调节除氧器200的压力,从而控制除氧器200的蒸汽量,保障给水继续被加热且给水泵不发生汽蚀。The fourth operating mode: when the steam turbine of the nuclear power unit is in load shedding mode, the deaerator 200 performs pressure control. When load shedding occurs in the steam turbine, the second regulating valve 900 is controlled by the regulating module 700 to adjust the pressure of the deaerator 200, thereby controlling the steam volume of the deaerator 200 to ensure that the feed water continues to be heated and cavitation of the feed water pump does not occur.

一阶滞后模块600跟踪斜坡信号在稳态时,系统的输入、输出信号的变化率完全相等,但由于系统存在惯性,当输入信号c(t)从0上升到1时,对应的输出信号在数值上要滞后于输入信号一个常量T,所以又可称为一阶滞后环节。When the first-order lag module 600 tracks the ramp signal in a steady state, the change rates of the input and output signals of the system are completely equal. However, due to the inertia of the system, when the input signal c(t) rises from 0 to 1, the corresponding output signal is Numerically, it lags behind the input signal by a constant T, so it can also be called a first-order lag link.

压力检测模块500实时获取除氧器200的压力,即高压缸100至除氧器200的排汽压力,一阶滞后模块600根据除氧器200的压力判断汽轮机是否发生甩负荷工况,并在判断汽轮机发生甩负荷工况时发出触发信号至调节模块700。调节模块700在接收到触发信号时对第二调节阀900的开度进行控制,使除氧器200的压力维持在甩负荷前的压力预设时间后(例如300s)再以预设速率下降。由此,不采用多信号组合逻辑,简化了甩负荷工况判定逻辑,仅采用除氧器的压力这个最直接的信号,从而可以精准识别除氧器压力变化,进而可以精准检测出汽轮机的甩负荷工况,并在识别到汽轮机发生甩负荷时控制除氧器的压力维持在甩负荷前的压力一段时间后再下降,以满足主给水泵吸入压头的要求,并能保证凝结水持续被加热,使机组故障排除后可以迅速恢复至原负荷设定值继续运行,从而可以在保持机组持续稳定运行。如图2所示,在本发明的一个实施例中,压力检测模块500可以包括第一压力变送器510、第二压力变送器520和第三压力变送器530。当第一压力变送器510、第二压力变送器520和第三压力变送器530均无故障时,压力检测模块500根据第一压力变送器510、第二压力变送器520和第三压力变送器530检测到的压力的中值获取除氧器200的压力;当第一压力变送器510、第二压力变送器520和第三压力变送器530中的任意一个压力变送器发生故障时,压力检测模块500根据未发生故障的两个压力变送器检测到的压力的平均值获取除氧器200的压力;当第一压力变送器510、第二压力变送器520和第三压力变送器530中的任意两个压力变送器发生故障时,压力检测模块500根据未发生故障的压力变送器检测到的压力获取除氧器200的压力;当第一压力变送器510、第二压力变送器520和第三压力变送器530均发生故障时,压力检测模块500根据第一压力变送器510、第二压力变送器520和第三压力变送器530中最后检测到的有效值获取除氧器200的压力。The pressure detection module 500 obtains the pressure of the deaerator 200 in real time, that is, the exhaust pressure from the high-pressure cylinder 100 to the deaerator 200. The first-order lag module 600 determines whether the steam turbine has a load shedding condition based on the pressure of the deaerator 200, and When it is determined that a load shedding condition occurs in the steam turbine, a trigger signal is sent to the adjustment module 700 . When receiving the trigger signal, the regulating module 700 controls the opening of the second regulating valve 900 so that the pressure of the deaerator 200 is maintained at the pressure before load shedding for a preset time (for example, 300s) and then decreases at a preset rate. Therefore, multi-signal combination logic is not used, and the load shedding condition determination logic is simplified. Only the most direct signal of the deaerator pressure is used, so that the deaerator pressure change can be accurately identified, and the turbine load shedding can be accurately detected. Load conditions, and when it is recognized that load shedding occurs in the steam turbine, the pressure of the deaerator is controlled to maintain the pressure before load shedding for a period of time and then decrease, so as to meet the requirements of the suction head of the main feed water pump and ensure that the condensate water continues to be Heating, so that the unit can quickly return to the original load setting value and continue to operate after troubleshooting, thereby maintaining the continuous and stable operation of the unit. As shown in FIG. 2 , in one embodiment of the present invention, the pressure detection module 500 may include a first pressure transmitter 510 , a second pressure transmitter 520 and a third pressure transmitter 530 . When the first pressure transmitter 510 , the second pressure transmitter 520 and the third pressure transmitter 530 are all faultless, the pressure detection module 500 detects the first pressure transmitter 510 , the second pressure transmitter 520 and the third pressure transmitter 530 according to the The median value of the pressure detected by the third pressure transmitter 530 obtains the pressure of the deaerator 200; when any one of the first pressure transmitter 510, the second pressure transmitter 520 and the third pressure transmitter 530 When the pressure transmitter fails, the pressure detection module 500 obtains the pressure of the deaerator 200 based on the average of the pressures detected by the two pressure transmitters that have not failed; when the first pressure transmitter 510 and the second pressure transmitter When any two pressure transmitters in the transmitter 520 and the third pressure transmitter 530 fail, the pressure detection module 500 obtains the pressure of the deaerator 200 based on the pressure detected by the pressure transmitter that has not failed; When the first pressure transmitter 510 , the second pressure transmitter 520 and the third pressure transmitter 530 all fail, the pressure detection module 500 determines whether the first pressure transmitter 510 , the second pressure transmitter 520 and the third pressure transmitter 530 The last detected effective value in the third pressure transmitter 530 obtains the pressure of the deaerator 200 .

具体地,除氧器200通过压力检测模块500检测除氧器200的压力,采用三取中的逻辑方法,具体处理逻辑如下:当变送器均无故障时,输出为三取中值;当一个变送器故障时,输出为其余两个正常工作变送器的平均值;当两个变送器故障时,输出为其余一个正常工作变送器的数值;当三个变送器均故障时,输出保持最后有效值;压力检测模块500在输出除氧器200的压力信号的同时,输出变送器故障信号。Specifically, the deaerator 200 detects the pressure of the deaerator 200 through the pressure detection module 500, and adopts the logical method of taking the three out of three. The specific processing logic is as follows: when none of the transmitters are faulty, the output is the median out of the three; When one transmitter fails, the output is the average value of the other two normally working transmitters; when two transmitters fail, the output is the value of the remaining normal working transmitter; when all three transmitters fail , the output maintains the last effective value; the pressure detection module 500 outputs a transmitter fault signal while outputting the pressure signal of the deaerator 200 .

压力检测模块500输出的除氧器200的压力信号将作为除氧器200运行时的被调量。当三个压力变送器中有两个故障时,除氧器200的压力控制切换到手动控制。当除氧器200的压力值过高时,在DCS(Distributed Control System,分散控制系统)操作员站上进行报警The pressure signal of the deaerator 200 output by the pressure detection module 500 will be used as the adjusted variable when the deaerator 200 is running. When two of the three pressure transmitters fail, the pressure control of the deaerator 200 is switched to manual control. When the pressure value of the deaerator 200 is too high, an alarm is issued on the DCS (Distributed Control System) operator station.

在本发明的一个实施例中,可根据以下公式获取一阶滞后模块600的传递函数:其中,τ为滤波时间,例如,τ=10s,s为变量。In one embodiment of the present invention, the transfer function of the first-order lag module 600 can be obtained according to the following formula: Among them, τ is the filtering time, for example, τ = 10s, and s is a variable.

在本发明的一个实施例中,一阶滞后模块600能够在检测到除氧器200的压力降低速率达到80KPa/10s或者压力阶跃下降80KPa时,判断汽轮机发生甩负荷工况。其中,除氧器200的压力为高压缸100至除氧器200的排汽压力。In one embodiment of the present invention, the first-order hysteresis module 600 can determine that the load shedding condition of the steam turbine occurs when it detects that the pressure reduction rate of the deaerator 200 reaches 80KPa/10s or the pressure step drops by 80KPa. The pressure of the deaerator 200 is the exhaust pressure from the high-pressure cylinder 100 to the deaerator 200 .

需要说明的是,一阶滞后模块600基于高压缸100至除氧器200的排汽压力这个直接的信号,通过判断高压缸100至除氧器200的排汽压力变化速率即可判断甩负荷工况的发生。由于压力检测模块500检测得到的压力信号本身具有抖动的特点,通过设置传递函数,一阶滞后模块600能够抑制压力信号的周期性干扰,获得准确的高压缸100至除氧器200的排汽压力变化情况。滤波时间τ的选取对于一阶滞后模块600判断的准确性非常关键,滤波时间τ即要能够适应高压缸100至除氧器200的排汽压力的快速变化,使滤波结果能及时跟上获得足够的灵敏度,又要防止由于过于灵敏不能有效滤除干扰而产生误识别甩负荷工况的发生。因此根据汽轮机甩负荷的特点,即高压缸100至除氧器200的排汽压力降低速率越大,排汽压力降低所需时间越短,选取滤波时间τ=10s,将触发信号发出的临界值高压缸100至除氧器200的排汽压力降低速率设定为80KPa/10s。当一阶滞后模块600检测到高压缸100至除氧器200的排汽压力降低速率达到80KPa/10s或者压力阶跃下降80KPa时,判断汽轮机发生甩负荷工况。It should be noted that the first-order lag module 600 is based on the direct signal of the exhaust pressure from the high-pressure cylinder 100 to the deaerator 200, and can determine the load shedding operation by judging the change rate of the exhaust pressure from the high-pressure cylinder 100 to the deaerator 200. occurrence of the situation. Since the pressure signal detected by the pressure detection module 500 itself has the characteristics of jitter, by setting the transfer function, the first-order lag module 600 can suppress the periodic interference of the pressure signal and obtain accurate exhaust pressure from the high-pressure cylinder 100 to the deaerator 200 Changes. The selection of the filter time τ is very critical to the accuracy of the judgment of the first-order lag module 600. The filter time τ must be able to adapt to the rapid changes in the exhaust pressure from the high-pressure cylinder 100 to the deaerator 200, so that the filter results can keep up with enough in time. The sensitivity must be high, and it is necessary to prevent misidentification of load shedding conditions due to being too sensitive and unable to effectively filter out interference. Therefore, according to the characteristics of the steam turbine load shedding, that is, the greater the exhaust pressure reduction rate from the high-pressure cylinder 100 to the deaerator 200, the shorter the time required for the exhaust pressure to decrease. The filter time τ = 10s is selected to set the critical value for the trigger signal. The exhaust pressure reduction rate from the high-pressure cylinder 100 to the deaerator 200 is set to 80KPa/10s. When the first-order lag module 600 detects that the exhaust steam pressure reduction rate from the high-pressure cylinder 100 to the deaerator 200 reaches 80KPa/10s or the pressure step drops by 80KPa, it is determined that the steam turbine is in a load shedding condition.

在本发明的一个实施例中,调节模块700可包括给定函数发生器和PID调节器。其中,给定函数发生器用于在接收到触发信号时,根据甩负荷前除氧器200的压力生成保压曲线;PID调节器用于根据保压曲线对第二调节阀900进行控制,以使除氧器200的压力以保压曲线进行变化。作为一种示例,如图3所示,保压曲线的压力变化可以为:先以甩负荷前除氧器200的压力保持300秒,再以0.1MPa/min降为0,其中,图3的横轴为时间,纵轴为除氧器的压力。In one embodiment of the invention, the adjustment module 700 may include a given function generator and a PID regulator. Among them, the given function generator is used to generate a pressure-maintaining curve according to the pressure of the deaerator 200 before load shedding when receiving the trigger signal; the PID regulator is used to control the second regulating valve 900 according to the pressure-maintaining curve to make the deaerator The pressure of the oxygenator 200 changes according to the pressure holding curve. As an example, as shown in Figure 3, the pressure change of the pressure holding curve can be: first maintain the pressure of the deaerator 200 before load shedding for 300 seconds, and then reduce it to 0 at 0.1MPa/min, where, Figure 3 The horizontal axis is time, and the vertical axis is deaerator pressure.

具体地,当机组出现故障导致汽轮机发生甩负荷工况时,一阶滞后模块600判断汽轮机发生甩负荷工况并输出触发信号,调节模块700的给定函数发生器在接收到触发信号时根据甩负荷前除氧器200的压力生成保压曲线,调节模块700通过PID调节器根据保压曲线控制第二调节阀900快速开启,主蒸汽系统300中的提供大量第一辅助蒸汽输入除氧器200中以维持除氧器200在汽轮机出现甩负荷前的压力,以满足主给水泵吸入压头的要求,并能保障凝结水被持续加热。参考设定的保压时间为300s,保压时间可根据具体情况进行调整。在保压时间内如果机组故障处理完毕,除氧器200压力稳定可为机组恢复升负荷至原机组状态创造条件,使机组达到持续稳定运行的目标。经过300s的保压时间后,PID调节器控制第二调节阀900缓慢关闭,以使除氧器200的压力按照0.1MPa/min的速率降至0,能够有效避免第二调节阀900因为用气量突然减小而超压打开。随后,给定值函数发生器输出跟踪除氧器的压力,PID调节器输出为零。Specifically, when a failure of the unit causes the steam turbine to undergo a load rejection condition, the first-order lag module 600 determines that the steam turbine has a load rejection condition and outputs a trigger signal. The given function generator of the adjustment module 700 receives the trigger signal according to the load rejection condition. The pressure of the deaerator 200 before load generates a pressure holding curve. The regulating module 700 controls the second regulating valve 900 to open quickly according to the pressure holding curve through the PID regulator. A large amount of first auxiliary steam in the main steam system 300 is provided to the deaerator 200 The pressure of the deaerator 200 before load shedding occurs in the steam turbine is maintained to meet the requirements of the suction head of the main feedwater pump and to ensure that the condensate water is continuously heated. The reference setting holding time is 300s, and the holding time can be adjusted according to specific conditions. If the unit failure is resolved during the pressure maintaining time, the stable pressure of the deaerator 200 can create conditions for the unit to restore the load and return to the original unit state, so that the unit can achieve the goal of continuous and stable operation. After a pressure holding time of 300s, the PID regulator controls the second regulating valve 900 to slowly close, so that the pressure of the deaerator 200 drops to 0 at a rate of 0.1MPa/min, which can effectively avoid the second regulating valve 900 due to gas consumption. suddenly decreases and the overpressure opens. Subsequently, the setpoint function generator output tracks the deaerator pressure and the PID regulator output is zero.

根据本发明实施例的核电机组系统,通过压力检测模块获取除氧器的压力变化,设置一阶滞后模块根据除氧器的压力变化判断汽轮机是否发生甩负荷工况,并在甩负荷工况时通过调节模块控制除氧器的压力维持在甩负荷前的压力一段时间,由此,能够精准检测出汽轮机的甩负荷工况,保障除氧器的压力稳定,有利于核电机组的长期稳定运行。According to the nuclear power unit system of the embodiment of the present invention, the pressure change of the deaerator is obtained through the pressure detection module, and a first-order lag module is set to determine whether the load shedding condition occurs in the steam turbine according to the pressure change of the deaerator, and when the load shedding condition is The adjustment module controls the pressure of the deaerator to be maintained at the pressure before load shedding for a period of time. This allows the load shedding condition of the turbine to be accurately detected, ensuring the stability of the deaerator pressure, which is conducive to the long-term stable operation of the nuclear power unit.

在本发明的描述中,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。“多个”的含义是两个或两个以上,除非另有明确具体的限定。In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. "Plural" means two or more, unless otherwise expressly and specifically limited.

在本说明书的描述中,参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中,对上述术语的示意性表述不必针对相同的实施例或示例。而且,描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外,在不相互矛盾的情况下,本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。在本说明书的描述中,参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中,对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且,描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外,在不相互矛盾的情况下,本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the invention. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other. In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the invention. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

应当理解,本发明的各部分可以用硬件、软件、固件或它们的组合来实现。在上述实施方式中,多个步骤或方法可以用存储在存储器中且由合适的指令执行系统执行的软件或固件来实现。如,如果用硬件来实现和在另一实施方式中一样,可用本领域公知的下列技术中的任一项或他们的组合来实现:具有用于对数据信号实现逻辑功能的逻辑门电路的离散逻辑电路,具有合适的组合逻辑门电路的专用集成电路,可编程门阵列(PGA),现场可编程门阵列(FPGA)等。It should be understood that various parts of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if it is implemented in hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: discrete logic gate circuits with logic functions for implementing data signals; Logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), etc.

本技术领域的普通技术人员可以理解实现上述实施例方法携带的全部或部分步骤是可以通过程序来指令相关的硬件完成,所述的程序可以存储于一种计算机可读存储介质中,该程序在执行时,包括方法实施例的步骤之一或其组合。Those of ordinary skill in the art can understand that all or part of the steps involved in implementing the methods of the above embodiments can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium. The program can be stored in a computer-readable storage medium. When executed, one of the steps of the method embodiment or a combination thereof is included.

此外,在本发明各个实施例中的各功能单元可以集成在一个处理模块中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。所述集成的模块如果以软件功能模块的形式实现并作为独立的产品销售或使用时,也可以存储在一个计算机可读取存储介质中。In addition, each functional unit in various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically alone, or two or more units can be integrated into one module. The above integrated modules can be implemented in the form of hardware or software function modules. If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

上述提到的存储介质可以是只读存储器,磁盘或光盘等。尽管上面已经示出和描述了本发明的实施例,可以理解的是,上述实施例是示例性的,不能理解为对本发明的限制,本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。The storage media mentioned above can be read-only memory, magnetic disks or optical disks, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and should not be construed as limitations of the present invention. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present invention. The embodiments are subject to changes, modifications, substitutions and variations.

尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principles and spirit of the invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (6)

1.一种核电机组系统,其特征在于,包括:1. A nuclear power unit system, characterized by including: 高压缸;high pressure cylinder; 除氧器,所述除氧器通过第一调节阀与所述高压缸的排气口相连,所述除氧器用于通过所述高压缸输出的蒸汽对进入除氧器的凝结水进行除氧处理;Deaerator, the deaerator is connected to the exhaust port of the high-pressure cylinder through a first regulating valve, and the deaerator is used to deoxygenate the condensed water entering the deaerator through the steam output by the high-pressure cylinder. deal with; 主蒸汽系统,所述主蒸汽系统通过第二调节阀与所述除氧器连接,所述主蒸汽系统用于给所述除氧器提供第一辅助蒸汽;A main steam system, the main steam system is connected to the deaerator through a second regulating valve, and the main steam system is used to provide first auxiliary steam to the deaerator; 辅助蒸汽系统,所述辅助蒸汽系统通过第三调节阀与所述除氧器连接,所述辅助蒸汽系统用于通过所述第三调节阀给所述除氧器提供第二辅助蒸汽,以使所述除氧器运行在空负荷定压运行工况;Auxiliary steam system, the auxiliary steam system is connected to the deaerator through a third regulating valve, and the auxiliary steam system is used to provide second auxiliary steam to the deaerator through the third regulating valve, so that The deaerator operates under no-load and constant-pressure operation conditions; 压力检测模块,所述压力检测模块设置在所述除氧器上,所述压力检测模块用于获取除氧器的压力;A pressure detection module, the pressure detection module is arranged on the deaerator, and the pressure detection module is used to obtain the pressure of the deaerator; 一阶滞后模块,所述一阶滞后模块用于根据所述除氧器的压力判断所述核电机组的汽轮机是否发生甩负荷工况,并在判断所述汽轮机发生甩负荷工况时发出触发信号;A first-order lag module, the first-order lag module is used to determine whether the steam turbine of the nuclear power unit is in a load-shedding condition based on the pressure of the deaerator, and to send a trigger signal when it is determined that the steam turbine is in a load-shedding condition. ; 调节模块,所述调节模块用于在接收到所述触发信号时对所述第二调节阀进行控制,以使所述除氧器的压力维持在甩负荷前的压力预设时间后以预设速率下降。A regulating module, the regulating module is used to control the second regulating valve when receiving the trigger signal, so that the pressure of the deaerator is maintained at the pressure before load shedding for a preset time. rate decreases. 2.根据权利要求1所述的核电机组系统,其特征在于,所述压力检测模块包括第一压力变送器、第二压力变送器和第三压力变送器,所述压力检测模具体用于:2. The nuclear power unit system according to claim 1, wherein the pressure detection module includes a first pressure transmitter, a second pressure transmitter and a third pressure transmitter, and the pressure detection module body Used for: 当所述第一压力变送器、所述第二压力变送器和所述第三压力变送器均无故障时,根据所述第一压力变送器、第二压力变送器和第三压力变送器检测到的压力的中值获取所述除氧器的压力;When the first pressure transmitter, the second pressure transmitter and the third pressure transmitter are all faultless, according to the first pressure transmitter, the second pressure transmitter and the third pressure transmitter, The pressure of the deaerator is obtained from the median value of the pressures detected by the three pressure transmitters; 当所述第一压力变送器、所述第二压力变送器和所述第三压力变送器中的任意一个压力变送器发生故障时,根据未发生故障的两个压力变送器检测到的压力的平均值获取所述除氧器的压力;When any one of the first pressure transmitter, the second pressure transmitter and the third pressure transmitter fails, according to the two pressure transmitters that have not failed, The pressure of the deaerator is obtained by averaging the detected pressures; 当所述第一压力变送器、所述第二压力变送器和所述第三压力变送器中的任意两个压力变送器发生故障时,根据未发生故障的压力变送器检测到的压力获取所述除氧器的压力;When any two pressure transmitters among the first pressure transmitter, the second pressure transmitter and the third pressure transmitter fail, the detection method is based on the pressure transmitter that has not failed. The pressure obtained is the pressure of the deaerator; 当所述第一压力变送器、所述第二压力变送器和所述第三压力变送器均发生故障时,根据所述第一压力变送器、所述第二压力变送器和所述第三压力变送器中最后检测到的有效值获取所述除氧器的压力。When the first pressure transmitter, the second pressure transmitter and the third pressure transmitter all fail, according to the first pressure transmitter, the second pressure transmitter and the last detected effective value in the third pressure transmitter to obtain the pressure of the deaerator. 3.根据权利要求1所述的核电机组系统,其特征在于,根据以下公式获取所述一阶滞后模块的传递函数:其中,τ为滤波时间,s为变量。3. The nuclear power unit system according to claim 1, characterized in that the transfer function of the first-order lag module is obtained according to the following formula: Among them, τ is the filtering time and s is the variable. 4.根据权利要求3所述的核电机组系统,其特征在于,τ=10s。4. The nuclear power unit system according to claim 3, characterized in that τ=10s. 5.根据权利要求4所述的核电机组系统,其特征在于,所述一阶滞后模块具体用于:5. The nuclear power unit system according to claim 4, characterized in that the first-order lag module is specifically used for: 当检测到除氧器的压力降低速率达到80KPa/10s或者压力阶跃下降80KPa时,判断所述汽轮机发生甩负荷工况。When it is detected that the pressure reduction rate of the deaerator reaches 80KPa/10s or the pressure step drops by 80KPa, it is determined that the steam turbine has a load shedding condition. 6.根据权利要求1所述的核电机组系统,其特征在于,所述调节模块具体包括:6. The nuclear power unit system according to claim 1, characterized in that the adjustment module specifically includes: 给定函数发生器,所述给定函数发生器用于在接收到所述触发信号时,根据甩负荷前除氧器的压力生成保压曲线,所述保压曲线的压力变化为:先以甩负荷前除氧器的压力保持300秒,再以0.1MPa/min降为0;A given function generator is used to generate a pressure-holding curve according to the pressure of the deaerator before load shedding when receiving the trigger signal. The pressure change of the pressure-holding curve is: first The pressure of the deaerator is maintained for 300 seconds before load, and then reduced to 0 at 0.1MPa/min; PID调节器,所述PID调节器用于根据所述保压曲线对所述第二调节阀进行控制,以使所述除氧器的压力以保压曲线进行变化。PID regulator, the PID regulator is used to control the second regulating valve according to the pressure maintaining curve, so that the pressure of the deaerator changes according to the pressure maintaining curve.
CN202310596623.9A 2023-05-25 2023-05-25 Nuclear power unit system Pending CN117095842A (en)

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