WO2023065718A1 - 核电厂厂用电源切换试验方法、装置及设备 - Google Patents
核电厂厂用电源切换试验方法、装置及设备 Download PDFInfo
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- WO2023065718A1 WO2023065718A1 PCT/CN2022/102852 CN2022102852W WO2023065718A1 WO 2023065718 A1 WO2023065718 A1 WO 2023065718A1 CN 2022102852 W CN2022102852 W CN 2022102852W WO 2023065718 A1 WO2023065718 A1 WO 2023065718A1
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D3/00—Control of nuclear power plant
- G21D3/001—Computer implemented control
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/02—Arrangements of auxiliary equipment
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D3/00—Control of nuclear power plant
- G21D3/04—Safety arrangements
- G21D3/06—Safety arrangements responsive to faults within the plant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Definitions
- the invention relates to the field of nuclear power, in particular to a test method, device and equipment for power supply switching in a nuclear power plant.
- the nuclear power plant When the nuclear power plant loses the normal power supply outside the plant, in order to restore the forced circulation of the primary circuit and the heat export capability of the core, it is necessary to start the reactor coolant pump through the power supply of the auxiliary transformer. For this reason, the nuclear power plant has set up the reactor coolant pump to pass the auxiliary step-down transformer start-up test (hereinafter referred to as BAS54), in order to realize the verification of the power supply ability of the auxiliary transformer to maintain the thermal shutdown condition of the primary circuit and the vacuum condition of the condenser.
- BAS54 auxiliary step-down transformer start-up test
- the test is to start the auxiliary equipment such as RCP001PO, CRF001PO, CEX001PO, SEN, SRI, CVI, CET, GGR, GHE and other auxiliary equipment through auxiliary transformer power supply when the reactor is in the thermal shutdown condition, and maintain the thermal shutdown condition of the primary circuit and the condensation vacuum condition.
- auxiliary equipment such as RCP001PO, CRF001PO, CEX001PO, SEN, SRI, CVI, CET, GGR, GHE and other auxiliary equipment through auxiliary transformer power supply when the reactor is in the thermal shutdown condition, and maintain the thermal shutdown condition of the primary circuit and the condensation vacuum condition.
- the BAS56 in the power supply switching test in the thermal state function test stage of the existing technical scheme The test with BAS54 is completed twice, that is, after the completion of the BAS56 test, it is necessary to restart the three main coolant pumps to heat the working fluid in the primary circuit, so that the reactor can reach the standard thermal shutdown condition before performing the BAS54 test.
- the period of a single test is shortened by means of staged tests, and finally the control of the temperature of the primary circuit is realized.
- the existing factory power switching technical solution is shown in Fig. 1 .
- the BAS54 test of the existing technical solution is to switch off the 500kV ultra-high voltage power supply switch to trigger the automatic switching action of the factory auxiliary transformer when the reactor is in the thermal shutdown condition.
- the factory power supply starts RCP001PO, CRF001PO, CEX001PO, SEN, SRI, CVI, CET, GGR, GHE and other equipment.
- the test process involves a large number of network-related equipment operations, so the requirements for the test window are strict, and there are quite high requirements for the accuracy and effectiveness of the test operation. Due to the complexity of the test operation and the increased risk of the test, a lot of manpower is required in the test process.
- the distribution of power supply for the auxiliary load of the nuclear power plant to maintain the thermal shutdown condition of the primary circuit and the vacuum condition of the condenser is shown in Figure 2.
- test method involves the operation of power grid equipment and is restricted by the power grid operation.
- the flexibility of the test execution window is poor.
- due to the poor continuous operation conditions of the test method it is not conducive to the main line construction period control of the thermal functional test;
- the re-uplinking of the unit involves more than 50 processes, electrical and instrument control systems that need to be restored. Considering the configuration of at least 2 people for each system, the labor cost of 200 man-days can be saved after the test coupling.
- the object of the present invention is to propose a test method, device and equipment for power supply switching in nuclear power plants, so as to improve the above problems.
- the present invention has adopted following scheme:
- a nuclear power plant power supply switching test method which includes:
- the final state of the BAS56 test was used as the initial state of the BAS54 test, and the BAS54 test was performed.
- the steps of performing the BAS56 test are specifically:
- the public switchboard 7LGI of the unit adopt the rapid power reverse technology imitating automatic switching to realize the rapid power stop and power transmission between adjacent units of the public load of the nuclear power unit, specifically including:
- test box Use the test box to verify the 7LGIB001JA test position opening and closing operation
- Disconnect 7LGIA001JA confirm that 7LGI is powered off, close 7LGIB001JA on the spot after a predetermined time, and 7LGI reverses the power supply to the adjacent unit LGC for power supply operation; among them, when 7LGIB001JA fails to close, 7LGI fails to switch to the adjacent unit LGC to supply power, then 7LGIA001JA The switch has been disconnected and put it in the isolation position, disconnect the 7LGIA001JA switching DC power supply, and perform the operation of 7LGI powered by 7LGIB;
- the step of carrying out the BAS54 test comprises:
- it also includes:
- it also includes:
- the LHP and LHQ emergency diesel generators are placed in a hot standby state to ensure that when the plant power supply fails to switch to the auxiliary transformer, the LHP/LHQ emergency automatically starts and supplies power to the main pump shaft seal and heat shield related equipment.
- the state of the unit is controlled according to the following plan:
- the state of the unit is controlled according to the following plan:
- the state of the unit is controlled according to the following plan:
- the state of the control unit is operated according to the following plan:
- the unit status is managed and controlled according to the following plan:
- the unit when LHA/LHB fails to switch to LHP/LHQ, the unit enters the SBO working condition, and the unit state is controlled according to the following plan:
- the simulation loses the main power supply outside the factory; specifically includes:
- the DCS in the main control room operates synchronously to disconnect LGA001JA and LGD001JA to trigger LGB/C to automatically switch to auxiliary transformer power supply;
- the embodiment of the present invention also provides a nuclear power plant power supply switching test device, which includes:
- the configuration unit is used to configure the initial state of the BAS56 test and the BAS54 test in parallel; among them, when the initial state of the BAS54 test is configured, the primary circuit thermal shutdown condition and the available state of the auxiliary equipment under the vacuum condition of the condenser are maintained to meet the needs of the factory power supply in the auxiliary equipment.
- the BAS56 test unit is used to execute the BAS56 test and obtain the final state of the BAS56 test after the end of the BAS56 test;
- the fast power reverse unit is used to realize the fast power stop and power transmission between adjacent units of the common load of the nuclear power unit by adopting the fast power reverse technology imitating automatic switching under the final state of the BAS56 test;
- the BAS54 test unit is used to use the final state of the BAS56 test as the initial state of the BAS54 test to execute the BAS54 test.
- the embodiment of the present invention also provides a nuclear power plant power supply switching test equipment, which includes a memory and a processor, and a computer program is stored in the memory, and the computer program can be executed by the processor to achieve the above-mentioned Test methods for power source switching in nuclear power plants.
- This embodiment can realize the in-depth decoupling of the factory power switching test and the network-related test, reduce the correlation degree of the factory power switching test to the network-related work, realize the high flexibility of the test window, further improve the test efficiency, and simplify the test operation , Reduce the risk of testing. It can reduce investment in manpower for test participation, plant power consumption, diesel generator fuel consumption, desalted water production and process wastewater treatment, saving more than 2 days of main line construction period in the thermal function test stage of nuclear power unit commissioning and start-up process, reducing cost and increasing The effect is remarkable.
- Fig. 1 is the flow chart of existing plant power switching technical scheme
- Fig. 2 is a schematic diagram of the distribution of auxiliary load power supply for maintaining thermal shutdown conditions and condenser vacuum conditions in an existing nuclear power plant.
- Fig. 3 is a schematic flow chart of a test method for switching power supplies for nuclear power plants according to the first embodiment of the present invention.
- Fig. 4 is another schematic flow chart of the nuclear power plant power supply switching test method according to the first embodiment of the present invention.
- FIG. 5 is a schematic flow chart of a fast power-back method for imitating automatic switching of 7LGI.
- Fig. 6 is a schematic flow chart of the emergency plan for the low temperature of the primary circuit.
- Fig. 7 is a schematic diagram of the processing flow when the plant power supply fails to switch.
- Figure 8 is a schematic flow chart of simulating the technical solution of losing the off-site main power supply.
- Fig. 9 is a schematic structural view of a nuclear power plant power supply switching test device according to the second embodiment of the present invention.
- Multiple embodiments of the present invention provide a test method, device, and equipment for switching power supplies in nuclear power plants, aiming at reducing the degree of relevance of switching tests for power supplies in power grids to grid operations, realizing the decoupling of BAS54 tests and grid-related operations, and improving The flexibility of the operation window arrangement reduces the risk of the test operation, improves the operation efficiency, and reduces the operation cost input.
- the load should be put into operation as much as possible before the test, so that in extreme The project is checked under the circumstances.
- the common switchboard 7LGI of the unit shall be powered by the test unit.
- the BAS54 test due to the power supply mode of the auxiliary transformer, when the auxiliary transformer power supply is required to start the main pump, it is necessary to switch the 7LGI to the adjacent unit for power supply operation.
- BAS56 and BAS54 are executed under two task windows, in order to realize the deep decoupling of BAS54 and network-related operations, fully simulate the operating conditions of nuclear power units losing the main power supply outside the plant, so as to continue to execute startup in auxiliary transformer power supply mode
- Auxiliary equipment such as RCP001PO, CRF001PO, CEX001PO, SEN, SRI, CVI, CET, GGR, GHE, etc., maintain the thermal shutdown condition of the primary circuit and the vacuum condition of the condenser.
- LGB102JA, LGC102JA Auxiliary Standby Transformer Power Side Incoming Breaker of CI Medium-Voltage Normal Distribution System
- auxiliary transformer Auxiliary Standby Transformer TA Factory auxiliary transformer, referred to as auxiliary transformer Auxiliary Standby Transformer
- Factory power supply includes factory normal power supply, factory auxiliary power supply and factory emergency power supply the Auxiliary Normal Power, the Auxiliary Standby Power and the Auxiliary Emergency Power
- the first embodiment of the present invention provides a nuclear power plant switching test method, which includes:
- the fast reverse power technology using imitation automatic switching specifically includes:
- test box Use the test box to verify the 7LGIB001JA test position opening and closing operation
- Disconnect 7LGIA001JA confirm that 7LGI is powered off, and close 7LGIB001JA after a predetermined time (such as 3 seconds), and 7LGI reverses the power supply to the adjacent unit LGC for power supply operation.
- S104 use the final state of the BAS56 test as the initial state of the BAS54 test, and perform the BAS54 test.
- the steps of the BAS54 test include:
- the primary circuit equipment includes RCP001PO, voltage regulator electric heater; the secondary circuit equipment includes: CRF001PO, CEX001PO, SEN, SRI, CVI, CET, GGR, GHE.
- this embodiment can realize the deep decoupling of the factory power switching test and the network-related test, reduce the correlation degree of the factory power switching test to the network-related work, realize the high flexibility of the test window, and further improve the test efficiency.
- Efficiency, simplified test operation, and reduced test risk. It can reduce investment in manpower for test participation, plant power consumption, diesel generator fuel consumption, desalted water production and process wastewater treatment, saving more than 2 days of main line construction period in the thermal function test stage of nuclear power unit commissioning and start-up process, reducing cost and increasing The effect is remarkable.
- the larger adjustment of the test logic sequence also increases the risks that need to be paid attention to during the test execution process.
- the power-reversing operation of 7LGI is simplified, the test may still face a long duration and cause the temperature of the primary circuit to drop to the threshold, requiring manual intervention by the operator.
- the emergency operation for low primary circuit temperature is as follows:
- this embodiment also includes:
- the LHP and LHQ emergency diesel generators are placed in a hot standby state to ensure that when the plant power supply fails to switch to the auxiliary transformer, the LHP/LHQ emergency automatically starts and supplies power to the main pump shaft seal and heat shield related equipment.
- the unit status is controlled according to the following plan: check and confirm that the LHA is powered by the emergency diesel generator LHP;
- the unit enters the SBO working condition, and the status of the unit is controlled according to the following plan:
- the loss of off-site main power supply simulation technical solution can be adopted, that is, to fully simulate the operating conditions of nuclear power units losing off-site main power supply, and reduce the cost of network-related work in the BAS54 test
- the degree of correlation realizes the complete decoupling of BAS54 test and network-related operations.
- the simulation technology for losing the off-site main power supply provided by this preferred embodiment specifically includes:
- the main control room DCS synchronously disconnects LGA001JA and LGD001JA to trigger LGB/C to automatically switch to auxiliary transformer power supply;
- the second embodiment of the present invention also provides a nuclear power plant power supply switching test device, which includes:
- the configuration unit 210 is used to configure the initial state of the BAS56 test and the BAS54 test in parallel; wherein, when the initial state of the BAS54 test is configured, the primary circuit thermal shutdown condition and the available state of the auxiliary equipment under the vacuum condition of the condenser are maintained to meet the requirements of the factory power supply in the initial state of the BAS54 test. Auxiliary equipment start-up requirements in auxiliary transformer power supply mode;
- the BAS56 test unit 220 is configured to execute the BAS56 test, and obtain the final state of the BAS56 test after the BAS56 test is completed;
- the fast switching unit 230 is used to implement the fast power switching between adjacent units of nuclear power plant common load by adopting the fast switching technology imitating automatic switching under the final state of the BAS56 test;
- the BAS54 test unit 240 is configured to use the final state of the BAS56 test as the initial state of the BAS54 test to execute the BAS54 test.
- the third embodiment of the present invention also provides a nuclear power plant power supply switching test equipment, which includes a memory and a processor, and a computer program is stored in the memory, and the computer program can be executed by the processor to realize Such as the above-mentioned nuclear power plant power supply switching test method.
- each block in a flowchart or block diagram may represent a module, program segment, or part of code that includes one or more Executable instructions.
- the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved.
- each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations can be implemented by a dedicated hardware-based system that performs the specified function or action , or may be implemented by a combination of dedicated hardware and computer instructions.
- each functional module in each embodiment of the present invention can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.
- the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium.
- the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, an electronic device, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention.
- the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc., which can store program codes.
- ROM read-only memory
- RAM random access memory
- magnetic disk or optical disc etc., which can store program codes.
- the terms "comprising”, “comprising” or any other variation thereof are intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or apparatus. Without further limitations, an element defined by the phrase “comprising a " does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.
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Abstract
一种核电厂厂用电源切换试验方法、装置及设备,该方法包括:并行配置BAS56试验与BAS54试验初态,其中,在配置BAS54试验初态时,维持一回路热停工况及凝汽器真空条件辅助设备的可用状态,满足厂用电源在辅变供电模式下的辅助设备启动要求(S101);执行BAS56试验,并在BAS56试验结束后,获得BAS56试验终态(S102);在BAS56试验终态下,采用仿自动切换的快速倒电技术,实现核电机组厂用公用负荷的相邻机组间的快速停送电(S103);以BAS56试验终态作为BAS54试验初态,执行BAS54试验(S104)。该方法能够实现厂用电源切换试验与涉网试验的深度解耦,减小厂用电源切换试验对涉网工作的关联度,实现试验窗口的高度灵活性,进一步提高试验效率、简化试验操作、降低试验风险。
Description
本发明涉及核电领域,具体而言,涉及一种核电厂厂用电源切换试验方法、装置及设备。
核电厂失去厂外正常电源工况下,为恢复一回路强迫循环和堆芯热量导出能力,需要通过辅变供电启动反应堆冷却剂泵。为此,核电厂设置了反应堆冷却剂泵通过辅助降压变压器启动试验(以下简称BAS54),以实现对辅助变压器维持一回路热停堆工况及凝汽器真空条件的供电能力的验证。该试验是在反应堆处于热停堆工况下,通过辅变供电启动RCP001PO、CRF001PO、CEX001PO、SEN、SRI、CVI、CET、GGR、GHE等辅助设备,维持一回路热停堆工况及凝汽器真空条件。
为避免热态功能试验阶段因厂用电源切换试验周期太长导致长时间失去反应堆冷却剂泵而引起一回路温度过低,现有技术方案中热态功能试验阶段厂用电源切换试验中的BAS56与BAS54分两次完成试验,即BAS56试验完成后,需要重新启动三台主冷却剂泵加热一回路工质,使反应堆重新达到标准热停工况后再执行BAS54试验。总的说来,通过分阶段试验的方式缩短单个试验的周期,最终实现对一回路温度的管控。现有的厂用电源切换技术方案如图1所示。
现有技术方案BAS54试验是在反应堆处于热停堆工况下,通过操作断开500kV超高压供电开关触发厂辅变自动切换动作,厂用电源在辅变供电模式下 启动RCP001PO,CRF001PO、CEX001PO、SEN、SRI、CVI、CET、GGR、GHE等设备。该试验过程中涉及大量涉网设备操作,因此对试验窗口要求严格,对试验操作的准确性和有效性等均提出相当高的要求。由于试验操作复杂,试验风险加大,试验过程中需要投入大量的人力。核电厂维持一回路热停堆工况及凝汽器真空条件的辅助负荷的供电分布如图2所示。
现有的热态功能试验阶段厂用电源切换试验方法存在如下缺陷:
1)试验作业窗口灵活性及连续性差,试验方法涉及电网设备操作,受电网操作制约,试验执行窗口灵活性较差。同时由于试验方法连续作业条件较差,不利于热态功能试验的主线工期控制;
2)增加调试期间厂用电消耗、除盐水生产及工艺废水处理费用;
3)增加柴油发电机燃油消耗:BAS56与BAS54试验耦合前,两次试验均需要启动两台6000kW的应急柴油发电机,增加应急柴油发电机燃油的消耗;
4)增加电气设备、工艺设备的试验冲击次数,增加工业设备的损耗;
5)增加了主泵、循环水泵等大泵在厂用电源切换瞬态下失去辅助系统的冲击次数;
6)误操作风险加大。增加的厂外供电电源、厂用配电系统及厂用负荷的恢复操作,机组的再次重新上行,涉及需要恢复的系统量较多,存在人因误操作风险;
7)人力成本投入增加。机组的再次重新上行,涉及需要恢复的工艺、电气以及仪控的系统多达50多个,按照每个系统至少2人配置来考虑,试验耦合后可节约人力200人工日的人力成本。
发明内容
有鉴于此,本发明的目的在于提出一种核电厂厂用电源切换试验方法、装置及设备,以改善上述问题。
本发明采用了如下方案:
一种核电厂厂用电源切换试验方法,其包括:
并行配置BAS56试验与BAS54试验初态;其中,在配置BAS54试验初态时,维持一回路热停工况及凝汽器真空条件辅助设备的可用状态,满足厂用电源在辅变供电模式下的辅助设备启动要求;
执行BAS56试验,并在BAS56试验结束后,获得BAS56试验终态;
在BAS56试验终态下,采用仿自动切换的快速倒电技术,实现核电机组厂用公用负荷的相邻机组间的快速停送电;
以BAS56试验终态作为BAS54试验初态,执行BAS54试验。
优选地,执行BAS56试验的步骤具体为:
断开厂外正常电源500kV超高压开关;
启动GPA保护动作,将厂用电源自动切换辅变供电;
恢复厂外正常电源500kV超高压开关,恢复主变压器运行,复位GPA保护;
完成BAS56试验。
优选地,对于机组公用配电盘7LGI,采用仿自动切换的快速倒电技术,实现核电机组厂用公用负荷的相邻机组间的快速停送电,具体包括:
确认7LGI供电的下游中压转动负荷已停运;
使用试验盒验证7LGIB001JA试验位分合闸操作;
将7LGIB001JA置于工作位置,准备倒电操作;
断开7LGIA001JA,确认7LGI失电,预定时间后就地合闸7LGIB001JA,7LGI倒电至相邻机组LGC供电运行;其中,当7LGIB001JA合闸不成功,7LGI切至相邻机组LGC供电失败,则7LGIA001JA开关已断开并将其置于隔离位置,断开7LGIA001JA开关直流电源,执行7LGI由7LGIB供电操作;
恢复7LGI供电的下游中压转动负荷。
优选地,执行BAS54试验的步骤包括:
操作LGA/D切换至辅变供电运行,依次启动一回路设备以及二回路设备;
将厂用电源切回至厂变供电,恢复厂用电设备,并恢复机组至热电停堆状态;
完成BAS54试验。
优选地,还包括:
当一回路温度下降至预警值时,通过辅变启动RCP001PO,维持一回路温度;
若不可行,恢复GEV向中压配电系统供电,以便操作人员能通过主电源启动一台或多台主泵来维持一回路的温度与压力。
优选地,还包括:
在试验初始状态下,将LHP与LHQ应急柴油发电机处于热备用状态,确保当厂用电源向辅变切换失败时,LHP/LHQ应急自动启动并向主泵轴封及热屏相关设备供电。
优选地,当LGB向辅变切换失败时,按如下预案管控机组状态:
检查确认LHA由应急柴油发电机LHP供电运行;
检查确认RCV/RRI/SEC继续运行;
执行RCV及ASG调节操作,稳定一回路温度压力;
恢复LGB由辅变供电;
恢复GEW/GEV供电;
恢复厂用电源由正常电源供电运行;
按初态重新配置试验条件重新执行试验。
优选地,当LGC向辅变切换失败时,按如下预案管控机组状态:
检查确认LHB由应急柴油发电机LHQ供电运行;
检查确认RCV/RRI/SEC继续运行;
执行RCV及ASG调节操作,稳定一回路温度压力;
恢复LGC由辅变供电;
恢复GEW/GEV供电;
恢复厂用电源由正常电源供电运行;
按初态重新配置试验条件重新执行试验。
优选地,当LGB/LGC向辅变切换均失败时,按如下预案管控机组状态:
检查确认LHA由应急柴油发电机LHP供电运行;
检查确认LHB由应急柴油发电机LHQ供电运行;
检查确认RCV/RRI/SEC继续运行;
执行RCV及ASG调节操作,稳定一回路温度压力;
恢复LGB由辅变供电;
恢复LGC由辅变供电;
恢复GEW/GEV供电;
恢复厂用电源由正常电源供电运行;
按初态重新配置试验条件并重新执行试验。
优选地,当LHA向LHP切换失败时,按如下预案操作管控机组状态:
检查确认LHB由应急柴油发电机LHQ供电运行;
检查确认RCV/RRI/SEC继续运行;
执行RCV及ASG调节操作,稳定一回路温度压力;
恢复LGB由辅变供电;
恢复GEW/GEV供电;
恢复厂用电源由正常电源供电运行;
按初态重新配置试验条件重新执行试验。
优选地,当LHB向LHQ切换失败时,按如下预案管控机组状态:
检查确认LHA由应急柴油发电机LHP供电运行;
检查确认RCV/RRI/SEC继续运行;
执行RCV及ASG调节操作,稳定一回路温度压力;
恢复LGC由辅变供电;
恢复GEW/GEV供电;
恢复厂用电源由正常电源供电运行;
按初态重新配置试验条件并重新执行试验。
优选地,当LHA/LHB向LHP/LHQ切换均失败时,机组进入SBO工况,按如下预案管控机组状态:
试验前将RRI/SEC配置为两列运行,列间备用功能投运;
试验前记录RCV设备状态;
恢复LGB/LHA至辅变供电或恢复LGC/LHB至辅变供电;
检查确认RCV/RRI/SEC继续运行,否则手动启动;
检查RCP泵的密封注入流量;其中,如果2min内未建立主泵轴封水,则不要再建立轴封水;
执行RCV及ASG调节操作,稳定一回路温度压力;
继续恢复其他供电系列由辅变供电;
恢复厂用电源由正常电源供电运行;
按初态重新配置试验条件并重新执行试验。
优选地,当BAS56与BAS54不能在同一任务窗口下执行时,模拟失去厂外主电源;具体包括:
在机组一回路热停堆工况下采用主控室DCS操作断开LGE001JA,LGF001JA;
在LGE001JA,LGF001JA断开后,主控室DCS同步操作断开LGA001JA 及LGD001JA触发LGB/C自动同步切换至辅变供电;
在辅变供电模式继续执行BAS54试验,启动RCP001PO,CRF001PO、CEX001PO、SEN、SRI、CVI、CET、GGR、GHE辅助设备维持一回路热停工况及凝汽器真空条件。
本发明实施例还提供了一种核电厂厂用电源切换试验装置,其包括:
配置单元,用于并行配置BAS56试验与BAS54试验初态;其中,在配置BAS54试验初态时,维持一回路热停工况及凝汽器真空条件辅助设备的可用状态,满足厂用电源在辅变供电模式下的辅助设备启动要求;
BAS56试验单元,用于执行BAS56试验,并在BAS56试验结束后,获得BAS56试验终态;
快速倒电单元,用于在BAS56试验终态下,采用仿自动切换的快速倒电技术,实现核电机组厂用公用负荷的相邻机组间的快速停送电;
BAS54试验单元,用于以BAS56试验终态作为BAS54试验初态,执行BAS54试验。
本发明实施例还提供了一种核电厂厂用电源切换试验设备,其包括存储器以及处理器,所述存储器内存储有计算机程序,所述计算机程序能够被所述处理器执行,以实现如上述的核电厂厂用电源切换试验方法。
本实施例能实现厂用电源切换试验与涉网试验的深度解耦,减小厂用电源切换试验对涉网工作的关联度,实现试验窗口的高度灵活性,进一步提高试验效率、简化试验操作、降低试验风险。在参试人力、厂用电消耗、柴油发电机燃油消耗以及除盐水生产及工艺废水处理等方面均能减少投入,节约核电机组调试启动过程热态功能试验阶段主线工期2天以上,降本增效成果显著。
为了更清楚地说明本发明实施方式的技术方案,下面将对实施方式中所需要使用的附图作简单地介绍,应当理解,以下附图仅示出了本发明的某些实施例,因此不应被看作是对范围的限定,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他相关的附图。
图1是现有的厂用电源切换技术方案的流程图;
图2是现有的核电厂维持热停堆工况及凝汽器真空条件的辅助负荷供电分布示意图。
图3是本发明第一实施例的核电厂厂用电源切换试验方法的一种流程示意图。
图4是本发明第一实施例的核电厂厂用电源切换试验方法的另一种流程示意图。
图5是7LGI仿自动切换的快速倒电方法的流程示意图。
图6是一回路温度过低应急预案的流程示意图。
图7是厂用电源切换失败时的处理流程示意图。
图8模拟失去厂外主电源技术方案的流程示意图。
图9是本发明第二实施例的核电厂厂用电源切换试验装置的结构示意图。
为使本发明实施方式的目的、技术方案和优点更加清楚,下面将结合本发明实施方式中的附图,对本发明实施方式中的技术方案进行清楚、完整地描述, 显然,所描述的实施方式是本发明一部分实施方式,而不是全部的实施方式。基于本发明中的实施方式,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式,都属于本发明保护的范围。因此,以下对在附图中提供的本发明的实施方式的详细描述并非旨在限制要求保护的本发明的范围,而是仅仅表示本发明的选定实施方式。基于本发明中的实施方式,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式,都属于本发明保护的范围。
本发明多个实施例提供了一种核电厂厂用电源切换试验方法、装置及设备,旨在减小厂用电源切换试验对电网操作的关联度,实现BAS54试验与涉网操作解耦,提高作业窗口安排的灵活度,降低试验操作风险,提高作业效率,减少作业成本投入。
具体而言,由于BAS56试验中为验证厂变与辅变相互切换时,LGB/C的剩余电压U下降到0.4UN的时间小于1.5秒,因此试验前应尽可能的投运负荷,以便在极端情况下对该项目加以检验。BAS56试验时机组公用配电盘7LGI需由试验机组供电。但是BAS54试验中,由于辅变的供电模式决定,当需要辅变供电启动主泵时,需将7LGI切至相邻机组供电运行。热试阶段厂用电源切至辅变供电后,由于堆芯没有余热,主泵停运后,堆芯失去热源,加之一回路的自然散热降温,一回路的温度与压力会缓慢下降,严重时一回路的温度与压力存在超出运行参数限制,带来反应堆保护系统非预期触发的严重后果。如果按照常规的运行倒电模式,严格执行运行停送电规程,势必会持续较长时间。为实现BAS56与BAS54耦合,厂用电源切换至辅变后机组状态稳定后需立即执行7LGI切至相邻机组供电操作。
针对BAS56与BAS54在两个任务窗口下执行的特殊情况,为实现BAS54与涉网操作的深度解耦,全面模拟核电机组失去厂外主电源运行工况,以便执行在辅变供电模式继续执行启动RCP001PO,CRF001PO、CEX001PO、SEN、SRI、 CVI、CET、GGR、GHE等辅助设备,维持一回路热停工况及凝汽器真空条件。
为便于对本发明的理解,下面对本发明做更详尽的描述。以下先对本发明涉及的一些专业术语进行说明。
BAS 电源切换试验 Electrical Power Supply Changeover Test
ASG 辅助给水系统 Auxiliary Feedwater
RCP 反应堆冷却剂系统 Reactor Cooling System
RCV化学和容积控制系统 Chemical and Volume Control
RRI 设备冷却水系统 Component Cooling
SEC 重要厂用水系统 Essential Service Water
CRF 循环水系统 Circulating Water System
CEX 凝结水抽取系统 Condensate Extraction System
GGR 汽机润滑、顶轴和盘车系统 Turbine Lubrication,Jacking and Turning System
GHE 发电机密封油系统 Generator Seal Oil System
CVI 凝汽器真空系统 Condenser Vacuum System
SEN 辅助冷却水系统 Auxiliary Cooling Water System
SRI 常规岛闭路冷却水系统 Conventional Island Closed Cooling Water System
CET 汽机轴封系统 Turbine Gland System
GEV 输电系统 Power Transmission System
GEW 500kV超高压配电系统 Extra High Voltage Distribution System
LGA、LGB、LGC、LGD、LGE、LGF 常规岛中压正常配电盘系统 CI Medium-Voltage Normal Distribution System
LGB001JA、LGC001JA 常规岛中压正常配电盘系统厂用正常电源侧联络进线开关 the Auxiliary Normal Transformer Power Side Tie Breaker of CI Medium-Voltage Normal Distribution System
LGB102JA、LGC102JA 常规岛中压正常配电盘系统厂用辅助电源侧进线开关 the Auxiliary Standby Transformer Power Side Incoming Breaker of CI Medium-Voltage Normal Distribution System
7LGJ BOP中压正常电源配电系统 BOP Medium-Voltage Normal switchboard
LHA、LHB 核岛中压应急配电系统 NI Medium-Voltage Distribution Board Emergency Power Supply System
LHP 中压交流应急配电系统-柴油机系列 A Medium-Voltage AC Emergency Power Supply-Diesel-Train A
LHQ 中压交流应急配电系统-柴油机系列 B Medium-Voltage AC Emergency Power Supply-Diesel-Train B
GPA 发电机变压器组保护系统 Generator and Power Transmission Protection System
TS 厂用降压变压器,简称厂变 Auxiliary Normal Transformer
TA 厂用辅助变压器,简称辅变 Auxiliary Standby Transformer
厂用电源 包括厂用正常电源、厂用辅助电源和厂用应急电源 the Auxiliary Normal Power,the Auxiliary Standby Power and the Auxiliary Emergency Power
DCS集散型控制系统(或称数字化控制系统)Distributed Control System
请参阅图3及图4所示,本发明第一实施例提供了一种核电厂厂用电源切换试验方法,其包括:
S101,并行配置BAS56试验与BAS54试验初态;其中,在配置BAS54试验初态时,维持一回路热停工况及凝汽器真空条件辅助设备的可用状态,满足厂用电源在辅变供电模式下的辅助设备启动要求。
S102,执行BAS56试验,并在BAS56试验结束后,获得BAS56试验终态。
其中,执行BAS56试验的步骤具体为:
断开厂外正常电源500kV超高压开关;
启动GPA保护动作,将厂用电源自动切换辅变供电;
恢复厂外正常电源500kV超高压开关,恢复主变压器运行,复位GPA保护;
完成BAS56试验。
S103,在BAS56试验终态下,采用仿自动切换的快速倒电技术,实现核电机组厂用公用负荷的相邻机组间的快速停送电。
其中,如图5所示,对于机组公用配电盘7LGI,采用仿自动切换的快速倒电技术具体包括:
确认7LGI供电的下游中压转动负荷已停运;
使用试验盒验证7LGIB001JA试验位分合闸操作;
将7LGIB001JA置于工作位置,准备倒电操作;
断开7LGIA001JA,确认7LGI失电,预定时间(如3秒)后就地合闸 7LGIB001JA,7LGI倒电至相邻机组LGC供电运行。
在本实施例中,当7LGIB001JA合闸不成功,说明7LGI切至相邻机组LGC供电失败,则7LGIA001JA开关已断开并将其置于隔离位置,断开7LGIA001JA开关直流电源,执行7LGI由7LGIB供电操作。
恢复7LGI供电的下游中压转动负荷。
S104,以BAS56试验终态作为BAS54试验初态,执行BAS54试验。
在本实施例中,BAS54试验的步骤包括:
操作LGA/D切换至辅变供电运行,依次启动一回路设备以及二回路设备。
其中,一回路设备包括RCP001PO,稳压器电加热器;二回路设备包括:CRF001PO、CEX001PO、SEN、SRI、CVI、CET、GGR、GHE。
将厂用电源切回至厂变供电,恢复厂用电设备,并恢复机组至热电停堆状态;
完成BAS54试验。
综上所述,本实施例能实现厂用电源切换试验与涉网试验的深度解耦,减小厂用电源切换试验对涉网工作的关联度,实现试验窗口的高度灵活性,进一步提高试验效率、简化试验操作、降低试验风险。在参试人力、厂用电消耗、柴油发电机燃油消耗以及除盐水生产及工艺废水处理等方面均能减少投入,节约核电机组调试启动过程热态功能试验阶段主线工期2天以上,降本增效成果显著。
为便于对本发明的理解,下面对本发明的一些优选实施例做更进一步的描述:
上述实施例中,试验逻辑顺序的较大调整也加大了试验执行过程中风险需 关注。虽然通过简化7LGI的倒电操作,但是试验还是可能面临持续时间过长造成一回路温度下降到阈值,需要操作员手动干预。为此,在本优选实施例中,如图6所示,一回路温度低应急操作如下:
试验开始前适当提高一回路温度,试验过程中密切监视一回路温度,当一回路温度下降至预警值时,为防止一回路温度继续下降,先通过辅变启动RCP001PO,维持一回路温度。若不可行,需要尽快恢复GEV向中压配电系统供电,以便操作人员能通过主电源手动启动一台或多台主泵来维持一回路的温度与压力。
厂用电源切换过程中可能会出现电源自动切换失败的情况,为保持主泵轴封及热屏不丢失,如图7所示,本实施例还包括:
在试验初始状态下,将LHP与LHQ应急柴油发电机处于热备用状态,确保当厂用电源向辅变切换失败时,LHP/LHQ应急自动启动并向主泵轴封及热屏相关设备供电。
其中,当LGB向辅变切换失败时,按如下预案管控机组状态:
检查确认LHA由应急柴油发电机LHP供电运行;
检查确认RCV/RRI/SEC继续运行;
执行RCV及ASG调节操作,稳定一回路温度压力;
恢复LGB由辅变供电;
恢复GEW/GEV供电;
恢复厂用电源由正常电源供电运行;
按初态重新配置试验条件重新执行试验。
其中,当LGC向辅变切换失败时,按如下预案管控机组状态:
检查确认LHB由应急柴油发电机LHQ供电运行;
检查确认RCV/RRI/SEC继续运行;
执行RCV及ASG调节操作,稳定一回路温度压力;
恢复LGC由辅变供电;
恢复GEW/GEV供电;
恢复厂用电源由正常电源供电运行;
按初态重新配置试验条件重新执行试验。
其中,当LGB/LGC向辅变切换均失败时,按如下预案管控机组状态:检查确认LHA由应急柴油发电机LHP供电运行;
检查确认LHB由应急柴油发电机LHQ供电运行;
检查确认RCV/RRI/SEC继续运行;
执行RCV及ASG调节操作,稳定一回路温度压力;
恢复LGB由辅变供电;
恢复LGC由辅变供电;
恢复GEW/GEV供电;
恢复厂用电源由正常电源供电运行;
按初态重新配置试验条件并重新执行试验。
其中,当LHA向LHP切换失败时,按如下预案操作管控机组状态:
检查确认LHB由应急柴油发电机LHQ供电运行;
检查确认RCV/RRI/SEC继续运行;
执行RCV及ASG调节操作,稳定一回路温度压力;
恢复LGB由辅变供电;
恢复GEW/GEV供电;
恢复厂用电源由正常电源供电运行;
按初态重新配置试验条件重新执行试验。
其中,当LHB向LHQ切换失败时,按如下预案管控机组状态:
检查确认LHA由应急柴油发电机LHP供电运行;
检查确认RCV/RRI/SEC继续运行;
执行RCV及ASG调节操作,稳定一回路温度压力;
恢复LGC由辅变供电;
恢复GEW/GEV供电;
恢复厂用电源由正常电源供电运行;
按初态重新配置试验条件并重新执行试验。
其中,当LHA/LHB向LHP/LHQ切换均失败时,机组进入SBO工况,按如下预案管控机组状态:
试验前将RRI/SEC配置为两列运行,列间备用功能投运;
试验前记录RCV设备状态;
恢复LGB/LHA至辅变供电或恢复LGC/LHB至辅变供电;
检查确认RCV/RRI/SEC继续运行,否则手动启动;
检查RCP泵的密封注入流量;其中,如果2min内未建立主泵轴封水,则不要再建立轴封水;
执行RCV及ASG调节操作,稳定一回路温度压力;
继续恢复其他供电系列由辅变供电;
恢复厂用电源由正常电源供电运行;
按初态重新配置试验条件并重新执行试验。
针对BAS56与BAS54在两个不同的任务窗口下执行的特殊情况,可采用失去厂外主电源模拟技术方案,即全面模拟核电机组失去厂外主电源运行工况,减少BAS54试验的涉网工作的关联度,实现BAS54试验与涉网操作完全解耦。如图8所示,本优选实施例提供的失去厂外主电源模拟技术具体包括:
在机组一回路热停堆工况下采用主控室DCS操作断开LGE001JA,LGF001JA;
在LGE001JA,LGF001JA断开后,主控室DCS同步操作断开LGA001JA及LGD001JA触发LGB/C自动同步切换至辅变供电;
在辅变供电模式继续执行BAS54试验,启动RCP001PO,CRF001PO、CEX001PO、SEN、SRI、CVI、CET、GGR、GHE辅助设备维持一回路热停工况及凝汽器真空条件。
请参阅图9,本发明第二实施例还提供了一种核电厂厂用电源切换试验装置,其包括:
配置单元210,用于并行配置BAS56试验与BAS54试验初态;其中,在配置BAS54试验初态时,维持一回路热停工况及凝汽器真空条件辅助设备的可用状态,满足厂用电源在辅变供电模式下的辅助设备启动要求;
BAS56试验单元220,用于执行BAS56试验,并在BAS56试验结束后,获得BAS56试验终态;
快速倒电单元230,用于在BAS56试验终态下,采用仿自动切换的快速倒电技术,实现核电机组厂用公用负荷的相邻机组间的快速停送电;
BAS54试验单元240,用于以BAS56试验终态作为BAS54试验初态,执行BAS54试验。
本发明第三实施例还提供了一种核电厂厂用电源切换试验设备,其包括存储器以及处理器,所述存储器内存储有计算机程序,所述计算机程序能够被所述处理器执行,以实现如上述的核电厂厂用电源切换试验方法。
在本发明所提供的几个实施例中,应该理解到,所揭露的装置和方法,也可以通过其它的方式实现。以上所描述的装置和方法实施例仅仅是示意性的,例如,附图中的流程图和框图显示了根据本发明的多个实施例的装置、方法和计算机程序产品的可能实现的体系架构、功能和操作。在这点上,流程图或框图中的每个方框可以代表一个模块、程序段或代码的一部分,所述模块、程序段或代码的一部分包含一个或多个用于实现规定的逻辑功能的可执行指令。也应当注意,在有些作为替换的实现方式中,方框中所标注的功能也可以以不同于附图中所标注的顺序发生。例如,两个连续的方框实际上可以基本并行地执行,它们有时也可以按相反的顺序执行,这依所涉及的功能而定。也要注意的是,框图和/或流程图中的每个方框、以及框图和/或流程图中的方框的组合,可以用执行规定的功能或动作的专用的基于硬件的系统来实现,或者可以用专用硬件与计算机指令的组合来实现。
另外,在本发明各个实施例中的各功能模块可以集成在一起形成一个独立的部分,也可以是各个模块单独存在,也可以两个或两个以上模块集成形成一个独立的部分。
所述功能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,可以存储在一个计算机可读取存储介质中。基于这样的理解,本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,电子设备,或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。需要说明的是,在本文中,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (15)
- 一种核电厂厂用电源切换试验方法,其特征在于,包括:并行配置BAS56试验与BAS54试验初态;其中,在配置BAS54试验初态时,维持一回路热停工况及凝汽器真空条件辅助设备的可用状态,满足厂用电源在辅变供电模式下的辅助设备启动要求;执行BAS56试验,并在BAS56试验结束后,获得BAS56试验终态;在BAS56试验终态下,采用仿自动切换的快速倒电技术,实现核电机组厂用公用负荷的相邻机组间的快速停送电;以BAS56试验终态作为BAS54试验初态,执行BAS54试验。
- 根据权利要求1所述的核电厂厂用电源切换试验方法,其特征在于,执行BAS56试验的步骤具体为:断开厂外正常电源500kV超高压开关;启动GPA保护动作,将厂用电源自动切换辅变供电;恢复厂外正常电源500kV超高压开关,恢复主变压器运行,复位GPA保护;完成BAS56试验。
- 根据权利要求1所述的核电厂厂用电源切换试验方法,其特征在于,对于机组公用配电盘7LGI,采用仿自动切换的快速倒电技术,实现核电机组厂用公用负荷的相邻机组间的快速停送电,具体包括:确认7LGI供电的下游中压转动负荷已停运;使用试验盒验证7LGIB001JA试验位分合闸操作;将7LGIB001JA置于工作位置,准备倒电操作;断开7LGIA001JA,确认7LGI失电,预定时间后就地合闸7LGIB001JA,7LGI倒电至相邻机组LGC供电运行;其中,当7LGIB001JA合闸不成功,7LGI切至相邻机组LGC供电失败,则7LGIA001JA开关已断开并将其置于隔离位置,断开7LGIA001JA开关直流电源,执行7LGI由7LGIB供电操作;恢复7LGI供电的下游中压转动负荷。
- 根据权利要求1所述的核电厂厂用电源切换试验方法,其特征在于,执行BAS54试验的步骤包括:操作LGA/D切换至辅变供电运行,依次启动一回路设备以及二回路设备;将厂用电源切回至厂变供电,恢复厂用电设备,并恢复机组至热电停堆状态;完成BAS54试验。
- 根据权利要求1所述的核电厂厂用电源切换试验方法,其特征在于,还包括:当一回路温度下降至预警值时,通过辅变启动RCP001PO,维持一回路温度;若不可行,恢复GEV向中压配电系统供电,以便操作人员能通过主电源启动一台或多台主泵来维持一回路的温度与压力。
- 根据权利要求1所述的核电厂厂用电源切换试验方法,其特征在于,还包括:在试验初始状态下,将LHP与LHQ应急柴油发电机处于热备用状态,确保当厂用电源向辅变切换失败时,LHP/LHQ应急自动启动并向主泵轴封及热屏相关设备供电。
- 根据权利要求6所述的核电厂厂用电源切换试验方法,其特征在于,当LGB向辅变切换失败时,按如下预案管控机组状态:检查确认LHA由应急柴油发电机LHP供电运行;检查确认RCV/RRI/SEC继续运行;执行RCV及ASG调节操作,稳定一回路温度压力;恢复LGB由辅变供电;恢复GEW/GEV供电;恢复厂用电源由正常电源供电运行;按初态重新配置试验条件重新执行试验。
- 根据权利要求6所述的核电厂厂用电源切换试验方法,其特征在于,当LGC向辅变切换失败时,按如下预案管控机组状态:检查确认LHB由应急柴油发电机LHQ供电运行;检查确认RCV/RRI/SEC继续运行;执行RCV及ASG调节操作,稳定一回路温度压力;恢复LGC由辅变供电;恢复GEW/GEV供电;恢复厂用电源由正常电源供电运行;按初态重新配置试验条件重新执行试验。
- 根据权利要求6所述的核电厂厂用电源切换试验方法,其特征在于,当LGB/LGC向辅变切换均失败时,按如下预案管控机组状态:检查确认LHA由应急柴油发电机LHP供电运行;检查确认LHB由应急柴油发电机LHQ供电运行;检查确认RCV/RRI/SEC继续运行;执行RCV及ASG调节操作,稳定一回路温度压力;恢复LGB由辅变供电;恢复LGC由辅变供电;恢复GEW/GEV供电;恢复厂用电源由正常电源供电运行;按初态重新配置试验条件并重新执行试验。
- 根据权利要求6所述的核电厂厂用电源切换试验方法,其特征在于,当LHA向LHP切换失败时,按如下预案操作管控机组状态:检查确认LHB由应急柴油发电机LHQ供电运行;检查确认RCV/RRI/SEC继续运行;执行RCV及ASG调节操作,稳定一回路温度压力;恢复LGB由辅变供电;恢复GEW/GEV供电;恢复厂用电源由正常电源供电运行;按初态重新配置试验条件重新执行试验。
- 根据权利要求6所述的核电厂厂用电源切换试验方法,其特征在于,当LHB向LHQ切换失败时,按如下预案管控机组状态:检查确认LHA由应急柴油发电机LHP供电运行;检查确认RCV/RRI/SEC继续运行;执行RCV及ASG调节操作,稳定一回路温度压力;恢复LGC由辅变供电;恢复GEW/GEV供电;恢复厂用电源由正常电源供电运行;按初态重新配置试验条件并重新执行试验。
- 根据权利要求6所述的核电厂厂用电源切换试验方法,其特征在于,当LHA/LHB向LHP/LHQ切换均失败时,机组进入SBO工况,按如下预案管控机组状态:试验前将RRI/SEC配置为两列运行,列间备用功能投运;试验前记录RCV设备状态;恢复LGB/LHA至辅变供电或恢复LGC/LHB至辅变供电;检查确认RCV/RRI/SEC继续运行,否则手动启动;检查RCP泵的密封注入流量;其中,如果2min内未建立主泵轴封水,则不要再建立轴封水;执行RCV及ASG调节操作,稳定一回路温度压力;继续恢复其他供电系列由辅变供电;恢复厂用电源由正常电源供电运行;按初态重新配置试验条件并重新执行试验。
- 根据权利要求4所述的核电厂厂用电源切换试验方法,其特征在于,还包括:当BAS56与BAS54不能在同一任务窗口下执行时,模拟失去厂外主电源;所述模拟失去厂外主电源,具体包括:在机组一回路热停堆工况下采用主控室DCS操作断开LGE001JA,LGF001JA;在LGE001JA,LGF001JA断开后,主控室DCS同步操作断开LGA001JA及LGD001JA触发LGB/C自动同步切换至辅变供电;在辅变供电模式继续执行BAS54试验,启动RCP001PO,CRF001PO、CEX001PO、SEN、SRI、CVI、CET、GGR、GHE辅助设备维持一回路热停工况及凝汽器真空条件。
- 一种核电厂厂用电源切换试验装置,其特征在于,包括:配置单元,用于并行配置BAS56试验与BAS54试验初态;其中,在配置BAS54试验初态时,维持一回路热停工况及凝汽器真空条件辅助设备的可用状 态,满足厂用电源在辅变供电模式下的辅助设备启动要求;BAS56试验单元,用于执行BAS56试验,并在BAS56试验结束后,获得BAS56试验终态;快速倒电单元,用于在BAS56试验终态下,采用仿自动切换的快速倒电技术,实现核电机组厂用公用负荷的相邻机组间的快速停送电;BAS54试验单元,用于以BAS56试验终态作为BAS54试验初态,执行BAS54试验。
- 一种核电厂厂用电源切换试验设备,其特征在于,包括存储器以及处理器,所述存储器内存储有计算机程序,所述计算机程序能够被所述处理器执行,以实现如权利要求1至13任意一项所述的核电厂厂用电源切换试验方法。
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| EP4432304A4 (en) | 2025-09-10 |
| CN114121317B (zh) | 2026-01-06 |
| CN114121317A (zh) | 2022-03-01 |
| EP4432304A1 (en) | 2024-09-18 |
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