CN215118335U - Testing device for function verification of secondary loop water supply system of nuclear power station - Google Patents
Testing device for function verification of secondary loop water supply system of nuclear power station Download PDFInfo
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- CN215118335U CN215118335U CN202121452804.7U CN202121452804U CN215118335U CN 215118335 U CN215118335 U CN 215118335U CN 202121452804 U CN202121452804 U CN 202121452804U CN 215118335 U CN215118335 U CN 215118335U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
A testing device for function verification of a secondary loop water supply system of a nuclear power station comprises a deaerator, a water supply pre-pump inlet isolation valve, a water supply pre-pump, a main water supply pump, a standby water supply pump, a minimum flow recirculation valve, a main water supply isolation valve, a main water supply adjusting valve, a steam generator, a deaerator liquid level monitoring device and a water supply flow monitoring device. And each test signal of the second loop water supply system of the nuclear power station is respectively connected with the simulation modeling server through a DCS cabinet of the second loop water supply system of the nuclear power station and a PXI data acquisition cabinet. The utility model discloses can realize verifying in advance to two return circuits water supply system actual function of nuclear power station to improve efficiency of software testing.
Description
Technical Field
The utility model belongs to the technical field of two return circuits water supply system of nuclear power station, concretely relates to a testing arrangement for two return circuits water supply system functional verification of nuclear power station.
Background
The two-loop water supply system conveys qualified two-loop water supply to the steam generator, and the water supply absorbs the heat of the reactor to generate steam to push the steam turbine generator unit to convert the heat energy into electric energy, which is an important component of the nuclear power station.
The nuclear power station secondary loop water supply system consists of a deaerator, a water supply pre-pump, a main water supply pump, a standby water supply pump, a steam generator, a pipeline and a valve. In order to guarantee safe and stable operation of the nuclear power station, the function verification of the control logic of the two-loop water supply system is important.
In a traditional test process, a tester usually performs logic modification on a Digital Control System (DCS) of a nuclear power station, and tests a system control cabinet in a mode of manually wiring and manually forcing signals to manually read a DCS display state. This test method has at least the following problems: under the conditions that the operation condition of the reactor starting and stopping system is complex and the number of measured values is large, the manual testing mode has the defects of reading errors and more errors of the testing result, and the testing efficiency is low; meanwhile, DCS logic needs to be modified in the testing process to simulate various operation states of the system, the start-stop system relates to the whole process operation condition of the unit start, stop and power operation stages, the related DCS logic range is wide, the direct modification of the DCS logic in the testing process brings hidden dangers to the subsequent stable operation of the unit, and the applicability of the testing mode is poor.
Disclosure of Invention
In order to overcome the deficiencies in the prior art, the utility model aims to provide a testing arrangement for nuclear power station two return circuits water supply system function verification, this testing arrangement can realize verifying in advance to nuclear power station two return circuits water supply system actual function to improve efficiency of software testing.
In order to realize the purpose, the utility model discloses a technical scheme is:
a test device for verifying the function of a secondary loop water supply system of a nuclear power station comprises:
the deaerator 1 is communicated with an inlet of the water supply pre-pump inlet isolation valve 2 and is used for removing gas in water;
the outlet of the inlet isolation valve 2 of the feed water pre-pump is communicated with the inlet of the feed water pre-pump 3 and is used for preventing the leakage at the inlet of the feed water pre-pump 3;
the outlet of the feed water pre-pump 3 is divided into two paths: one way is communicated with the inlet of the main water feeding pump 4, the other way is communicated with the inlet of the standby water feeding pump 5, the pressure of the main water feeding pump 4 and the pressure of the standby water feeding pump 5 are increased, and the outlets of the main water feeding pump 4 and the standby water feeding pump 5 are converged and then divided into three ways:
the first path is communicated with an inlet of a minimum flow recirculation valve 6, and an outlet of the minimum flow recirculation valve 6 is communicated with an inlet of a deaerator 1;
the second path is communicated with the inlet of a main water supply isolation valve 7, the outlet of the main water supply isolation valve 7 is communicated with the inlet of a main water supply regulating valve 8, and the outlet of the main water supply regulating valve 8 is communicated with the inlet of a steam generator 9;
the third path is communicated with the inlet of the feed water flow measuring device 11;
the system comprises a water supply pre-pump inlet isolation valve 2, a water supply pre-pump 3, a main water supply pump 4, a standby water supply pump 5, a minimum flow recirculation valve 6, a main water supply isolation valve 7, a main water supply regulating valve 8, a deaerator liquid level monitoring device 10 and a water supply flow measuring device 11 which are connected with a simulation modeling server 14 through a PXI data acquisition cabinet 13 through a two-loop water supply system DCS cabinet 12 respectively.
The deaerator is characterized in that a deaerator liquid level monitoring device 10 is arranged inside the deaerator 1, and the deaerator liquid level monitoring device 10 is used for monitoring the liquid level in the deaerator 1.
The two-loop water supply system DCS cabinet 12 comprises a DCS cabinet body, and a deaerator liquid level measurement clamping piece 12-1, a minimum flow recirculation valve driving clamping piece 12-2, a main water supply pump driving clamping piece 12-3, a main water supply regulating valve driving clamping piece 12-4, a main water supply isolation valve driving clamping piece 12-5, a standby water supply pump driving clamping piece 12-6, a water supply preposed pump driving clamping piece 12-7, a water supply preposed pump inlet isolation valve driving clamping piece 12-8 and a water supply flow measuring device driving clamping piece 12-9 which are arranged in the DCS cabinet body;
the deaerator liquid level measuring clamping piece 12-1 is connected with a deaerator liquid level monitoring device 10, the minimum flow recirculation valve driving clamping piece 12-2 is connected with a minimum flow recirculation valve 6, the main feed pump driving clamping piece 12-3 is connected with a main feed pump 4, the main feed regulating valve driving clamping piece 12-4 is connected with a main feed regulating valve 8, the main feed isolating valve driving clamping piece 12-5 is connected with a main feed isolating valve 7, the standby feed pump driving clamping piece 12-6 is connected with a standby feed pump 5, the feed preposed pump driving clamping piece 12-7 is connected with a feed preposed pump 3, the feed preposed pump inlet isolating valve driving clamping piece 12-8 is connected with a feed preposed pump inlet isolating valve 2, and the feed flow measuring device driving clamping piece 12-9 is connected with a feed flow measuring device 11.
The PXI data acquisition cabinet 13 comprises a data acquisition cabinet body and an A/D conversion clamping piece 13-1, a minimum flow recirculation valve A/D conversion clamping piece 13-2, a main water feed pump A/D conversion clamping piece 13-3, a main water feed regulating valve A/D conversion clamping piece 13-4, a main water feed isolation valve A/D conversion clamping piece 13-5, a standby water feed pump A/D conversion clamping piece 13-6, a water feed preposed pump A/D conversion clamping piece 13-7, a water feed preposed pump inlet isolation valve A/D conversion clamping piece 13-8 and a water feed flow measuring device A/D conversion clamping piece 13-9 which are arranged in the data acquisition cabinet body;
the simulation modeling server 14 comprises a deaerator liquid level measurement simulation module 14-1, a minimum flow recirculation valve simulation module 14-2, a main feed pump simulation module 14-3, a main feed regulating valve simulation module 14-4, a main feed isolation valve simulation module 14-5, a standby feed pump simulation module 14-6, a feed pre-pump simulation module 14-7, a feed pre-pump inlet isolation valve simulation module 14-8 and a feed flow measurement device simulation module 14-9;
the deaerator liquid level measurement simulation module 14-1 is connected with the deaerator liquid level measurement clamping piece 12-1 through a deaerator liquid level measurement A/D conversion clamping piece 13-1;
the minimum flow recirculation valve simulation module 14-2 is connected with the minimum flow recirculation valve driving card 12-2 through the minimum flow recirculation valve A/D conversion card 13-2;
the main water-feeding pump simulation module 14-3 is connected with a main water-feeding pump driving clamping piece 12-3 through a main water-feeding pump A/D conversion clamping piece 13-3;
the main water supply regulating valve simulation module 14-4 is connected with a main water supply regulating valve driving clamping piece 12-4 through a main water supply regulating valve A/D conversion clamping piece 13-4;
the main water supply isolation valve simulation module 14-5 is connected with a main water supply isolation valve driving clamping piece 12-5 through a main water supply isolation valve A/D conversion clamping piece 13-5;
the standby water-feeding pump simulation module 14-6 is connected with a standby water-feeding pump driving clamping piece 12-6 through a standby water-feeding pump A/D conversion clamping piece 13-6;
the water supply preposed pump simulation module 14-7 is connected with a water supply preposed pump driving clamping piece 12-7 through a water supply preposed pump A/D conversion clamping piece 13-7;
the simulation module 14-8 of the inlet isolating valve of the feed water pre-pump is connected with the drive clamping piece 12-8 of the inlet isolating valve of the feed water pre-pump through the A/D conversion clamping piece 13-8 of the inlet isolating valve of the feed water pre-pump;
the simulation module 14-9 of the water supply flow measuring device is connected with the driving clamping piece 12-9 of the water supply flow measuring device through the A/D conversion clamping piece 13-9 of the water supply flow measuring device.
A use method of a test device for verifying the function of a secondary loop water supply system of a nuclear power station comprises the following test contents: (1) the water supply pre-pump starts and stops the test: (2) starting, stopping and switching tests of the main water feeding pump and the standby water feeding pump; (3) verifying the function of the minimum flow recirculation valve; (4) and the functions of the main water supply isolation valve and the main water supply regulating valve are verified.
In the test process, the controller parameters in the simulation modeling server 14 are repeatedly adjusted until the inlet isolation valve 2 of the feed water pre-pump, the minimum flow recirculation valve 6, the main feed water isolation valve 7 and the main feed water regulating valve 8 meet the design function, and the feed water pre-pump 3, the main feed water pump 4 and the standby feed water pump 5 meet the design function.
The specific operation steps of the starting and stopping test of the water supply pre-pump are as follows:
a normal liquid level in the deaerator 1 is set in the deaerator liquid level measurement simulation module 14-1, and a liquid level signal output by the deaerator liquid level measurement simulation module 14-1 is transmitted to a deaerator liquid level measurement clamping piece 12-1 through a deaerator liquid level measurement A/D conversion clamping piece 13-1 and then transmitted to a deaerator liquid level monitoring device 10;
the simulation modeling server 14 triggers a water supply pre-pump starting signal, the water supply pre-pump simulation module 14-7 transmits the water supply pre-pump starting signal to the water supply pre-pump driving clamping piece 12-7 through the water supply pre-pump A/D conversion clamping piece 13-7 and drives the water supply pre-pump 3 to start, and a water supply pre-pump 3 starting response characteristic curve is tested; meanwhile, the simulation module 14-8 of the inlet isolating valve of the feed water pre-pump is transmitted to a drive clamping piece 12-8 of the inlet isolating valve of the feed water pre-pump through an A/D conversion clamping piece 13-8 of the inlet isolating valve of the feed water pre-pump and drives the inlet isolating valve 2 of the feed water pre-pump to be opened, and the opening time of the inlet isolating valve 2 of the feed water pre-pump is tested;
the liquid level in a deaerator 1 is set to be a low liquid level in a deaerator liquid level measurement simulation module 14-1, an output liquid level low signal is transmitted to a deaerator liquid level measurement clamping piece 12-1 through a deaerator liquid level measurement A/D conversion clamping piece 13-1 and then transmitted to a deaerator liquid level monitoring device 10, a deaerator liquid level monitoring device 10 signal is transmitted to a two-loop water supply system DCS cabinet 12, a water supply pre-pump driving clamping piece 12-7 drives a water supply pre-pump 3 to stop, and a water supply pre-pump 3 stop response characteristic curve is tested; meanwhile, the inlet isolating valve 2 of the feed water pre-pump is driven to close by a feed water pre-pump inlet isolating valve driving clamp 12-8, and the closing time of the inlet isolating valve 2 of the feed water pre-pump is tested;
the specific operation steps of the starting, stopping and switching test of the main water feed pump and the standby water feed pump are as follows:
initial state: the feed water pre-pump 3 runs normally, the minimum flow recirculation valve 6 is fully opened, and the main feed water pump isolation valve 7 is fully closed;
the simulation modeling server 14 triggers a main feed pump starting signal, the main feed pump simulation module 14-3 transmits the main feed pump starting signal to the main feed pump driving clamping piece 12-3 through the main feed pump A/D conversion clamping piece 13-3 and drives the feed pump 4 to start, and a starting response characteristic curve of the feed pump 4 is tested; meanwhile, the minimum flow recirculation valve simulation module 14-2 transmits the data to the minimum flow recirculation valve driving card 12-2 through the minimum flow recirculation valve A/D conversion card 13-2 and drives the minimum flow recirculation valve 6 to be opened, and the opening time of the minimum flow recirculation valve 6 is tested;
the simulation modeling server 14 triggers a tripping signal of the main feed pump, the tripping signal is transmitted to a main feed pump driving clamping piece 12-3 by a main feed pump simulation module 14-3 through a main feed pump A/D conversion clamping piece 13-3 and drives the feed pump 4 to stop, and a stop response characteristic curve of the main feed pump 4 is tested; meanwhile, the standby water-feeding pump 5 is driven to start by a standby water-feeding pump driving clamping piece 12-6, and a starting response characteristic curve of the standby water-feeding pump 5 is tested;
the simulation modeling server 14 triggers a trip signal of the water supply pre-pump 3, the water supply pre-pump drives the clamping piece 12-7 and drives the water supply pre-pump 3 to stop, the stop signal of the water supply pre-pump 3 is transmitted to the water supply pre-pump simulation module 14-7 through the A/D conversion clamping piece 13-7 of the water supply pre-pump, the standby water supply pump simulation module 14-6 in the simulation modeling server 14 receives the trip signal of the water supply pre-pump 3, the standby water supply pump A/D conversion clamping piece 13-6 transmits the trip signal to the standby water supply pump driving clamping piece 12-6 and drives the standby water supply pump 5 to stop, and the stop response characteristic curve of the standby water supply pump 5 is tested;
the functional verification of the minimum flow recirculation valve comprises the following specific operation steps:
initial state: the water supply pre-pump 3 runs normally, the main water supply pump 4 runs normally, the minimum flow recirculation valve 6 is fully opened, and the main water supply pump isolation valve 7 is fully closed;
the minimum flow recirculation valve simulation module 14-2 is provided with a minimum flow recirculation valve 6 which is not fully opened and has an opening degree of less than 90%, and the minimum flow recirculation valve is transmitted to a minimum flow recirculation valve driving card 12-2 through an A/D conversion card 13-2 of the minimum flow recirculation valve and drives the minimum flow recirculation valve 6 to be closed to be less than 90%; meanwhile, when the feed water flow measuring device simulation module 14-9 receives a feed water flow low signal, the main feed water pump simulation module 14-3 in the simulation modeling server 14 receives a minimum flow recirculation valve 6 non-full-open and feed water flow low signal and triggers a main feed water pump trip signal, and the main feed water pump simulation module 14-3 transmits the signal to the main feed water pump driving clamping piece 12-3 through the main feed water pump A/D conversion clamping piece 13-3 and drives the feed water pump 4 to stop;
the minimum flow recirculation valve simulation module 14-2 is provided with a minimum flow recirculation valve 6 which is gradually opened to 30%, 50% and 100%, the minimum flow recirculation valve A/D conversion card 13-2 is transmitted to a minimum flow recirculation valve driving card 12-2 and drives the minimum flow recirculation valve to be opened to a corresponding opening degree, and an opening characteristic curve of the minimum flow recirculation valve 6 is tested;
the minimum flow recirculation valve 6 is arranged in the minimum flow recirculation valve simulation module 14-2 and gradually closed to 75%, 50% and 0%, the minimum flow recirculation valve A/D conversion card 13-2 is transmitted to the minimum flow recirculation valve driving card 12-2 and drives the minimum flow recirculation valve 6 to be closed to a corresponding opening degree, and a closing characteristic curve of the minimum flow recirculation valve 6 is tested;
the functional verification of the main water supply isolation valve and the main water supply regulating valve comprises the following specific operation steps:
initial state: the water supply pre-pump 3 runs normally, the main water supply pump 4 runs normally, the minimum flow recirculation valve 6 is fully opened, the main water supply pump isolation valve 7 and the main water supply regulating valve 8 are fully closed, the liquid level in the deaerator 1 is normal, and the water supply flow is normal;
the simulation modeling server 14 triggers a water supply signal of the steam generator 9, a main water supply isolation valve simulation module 14-5 transmits the water supply signal to a main water supply isolation valve driving clamping piece 12-5 through a main water supply isolation valve A/D conversion clamping piece 13-5 and drives the main water supply isolation valve 7 to be opened, and the opening time of the main water supply isolation valve 7 is tested; the main water supply regulating valve simulation module 14-4 transmits the signal to a main water supply regulating valve driving clamping piece 12-4 through a main water supply regulating valve A/D conversion clamping piece 13-4 and drives the main water supply regulating valve 8 to be gradually opened, and a main water supply regulating valve 8 regulation response characteristic curve is tested; meanwhile, the minimum flow recirculation valve simulation module 14-2 transmits the water to the minimum flow recirculation valve driving clamping piece 12-2 through the minimum flow recirculation valve A/D conversion clamping piece 13-2 and drives the minimum flow recirculation valve 6 to be gradually closed, the minimum flow recirculation valve 6 is tested to adjust a response characteristic curve, and the feed water flow is monitored by a feed water flow measuring device until the steam generator 9 is increased to the rated feed water flow from the starting feed water flow;
in the test process, the controller parameters in the simulation modeling server 14 are repeatedly adjusted until the inlet isolation valve 2 of the feed water pre-pump, the minimum flow recirculation valve 6, the main feed water isolation valve 7 and the main feed water regulating valve 8 meet the design function, and the feed water pre-pump 3, the main feed water pump 4 and the standby feed water pump 5 meet the design function.
The utility model has the advantages that:
the testing device and the testing method realize logic rehearsal and dynamic testing of the nuclear power station secondary loop water supply system, expose and correct the problems existing in the logic configuration of the emergency shutdown system in advance, and greatly improve the safety and reliability of the nuclear power station secondary loop water supply system during the unit operation. In actual operation, the control idea of the nuclear power station secondary loop water supply system can be configured, debugged, tested, verified and optimized, real-time communication can be carried out with the DCS, the verified mature control configuration is synchronized into the DCS, and the problem that the design function of the DCS is not verified by repeatedly modifying the configuration logic is solved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein 1 is a deaerator, 2 is a water supply preposed pump inlet isolating valve, 3 is a water supply preposed pump, 4 is a main water supply pump, 5 is a standby water supply pump, 6 is a minimum flow recirculation valve, 7 is a main water supply isolating valve, 8 is a main water supply regulating valve, 9 is a steam generator, 10 is a deaerator liquid level monitoring device, and 11 is a water supply flow measuring device, 12 is a two-loop water supply system DCS cabinet, 12-1 is a deaerator liquid level measurement clamping piece, 12-2 is a minimum flow recirculation valve driving clamping piece, 12-3 is a main water supply pump driving clamping piece, 12-4 is a main water supply regulating valve driving clamping piece, 12-5 is a main water supply isolation valve driving clamping piece, 12-6 is a standby water supply pump driving clamping piece, 12-7 is a water supply front pump driving clamping piece, 12-8 is a water supply front pump inlet isolation valve driving clamping piece, and 12-9 is a water supply flow measuring device driving clamping piece; 13 is a PXI data acquisition cabinet, 13-1 is a deaerator liquid level measurement A/D conversion clamping piece, 13-2 is a minimum flow recirculation valve A/D conversion clamping piece, 13-3 is a main water feed pump A/D conversion clamping piece, 13-4 is a main water feed regulating valve A/D conversion clamping piece, 13-5 is a main water feed isolating valve A/D conversion clamping piece, 13-6 is a standby water feed pump A/D conversion clamping piece, 13-7 is a water feed preposed pump A/D conversion clamping piece, 13-8 is a water feed preposed pump inlet isolating valve A/D conversion clamping piece, and 13-9 is a water feed flow measurement device A/D conversion clamping piece; 14 is a simulation modeling server, 14-1 is a deaerator liquid level measurement simulation module, 14-2 is a minimum flow recirculation valve simulation module, 14-3 is a main feed pump simulation module, 14-4 is a main feed regulating valve simulation module, 14-5 is a main feed isolation valve simulation module, 14-6 is a standby feed pump simulation module, 14-7 is a feed water pre-pump simulation module, 14-8 is a feed water pre-pump inlet isolation valve simulation module, and 14-9 is a feed water flow measurement device simulation module.
Detailed Description
The present invention will be described in further detail with reference to examples.
Referring to fig. 1:
the first embodiment is as follows:
taking a 200MW high-temperature gas cooled reactor unit as an example, a scheme that two sets of nuclear steam supply systems are connected with a steam turbine to form a set of nuclear power unit is formed. The thermal power of each nuclear steam supply system is 250MW, the total thermal power is 500MW, and the electric power is 212 MW. Helium is adopted as a coolant in the primary loop of the reactor, the operating pressure is 7MPa, the pressure of a water supply system of the secondary loop of the reactor is rated parameter 14.9MPa in the whole operating process, and the rated flow of the water supply of the steam generator is 345.6 t/h.
The utility model discloses a concrete working process does:
(1) the water supply pre-pump starts and stops the test:
the normal (1400-2500 mm) liquid level in the deaerator 1 is set in the deaerator liquid level measurement simulation module 14-1, and an output liquid level signal is transmitted to the deaerator liquid level measurement clamping piece 12-1 through the deaerator liquid level measurement A/D conversion clamping piece 13-1 and then transmitted to the deaerator liquid level monitoring device 10.
The simulation modeling server 14 triggers a water supply pre-pump starting signal, the water supply pre-pump simulation module 14-7 transmits the water supply pre-pump starting signal to the water supply pre-pump driving clamping piece 12-7 through the water supply pre-pump A/D conversion clamping piece 13-7 and drives the water supply pre-pump 3 to start, and a water supply pre-pump 3 starting response characteristic curve is tested; meanwhile, the simulation module 14-8 of the inlet isolating valve of the feed water pre-pump is transmitted to a drive clamping piece 12-8 of the inlet isolating valve of the feed water pre-pump through an A/D conversion clamping piece 13-8 of the inlet isolating valve of the feed water pre-pump and drives the inlet isolating valve 2 of the feed water pre-pump to be opened, and the opening time of the inlet isolating valve 2 of the feed water pre-pump is tested;
the liquid level in a deaerator 1 is set to be low (< 1400mm) in a deaerator liquid level measurement simulation module 14-1, an output liquid level low signal is transmitted to a deaerator liquid level measurement clamping piece 12-1 through a deaerator liquid level measurement A/D conversion clamping piece 13-1 and then transmitted to a deaerator liquid level monitoring device 10, a deaerator liquid level monitoring device 10 signal is transmitted to a two-loop water supply system DCS cabinet 12, a water supply pre-pump driving clamping piece 12-7 drives a water supply pre-pump 3 to stop, and a water supply pre-pump 3 stop response characteristic curve is tested; meanwhile, the inlet isolating valve 2 of the feed water pre-pump is driven to close by a feed water pre-pump inlet isolating valve driving clamp 12-8, and the closing time of the inlet isolating valve 2 of the feed water pre-pump is tested.
(2) Starting, stopping and switching tests of the main water feeding pump and the standby water feeding pump;
initial state: the feed water pre-pump 3 runs normally, the minimum flow recirculation valve 6 is fully opened, and the main feed water pump isolation valve 7 is fully closed.
The simulation modeling server 14 triggers a main feed pump starting signal, the main feed pump simulation module 14-3 transmits the main feed pump starting signal to the main feed pump driving clamping piece 12-3 through the main feed pump A/D conversion clamping piece 13-3 and drives the feed pump 4 to start, and a starting response characteristic curve of the feed pump 4 is tested; meanwhile, the minimum flow recirculation valve simulation module 14-2 transmits the data to the minimum flow recirculation valve driving card 12-2 through the minimum flow recirculation valve A/D conversion card 13-2 and drives the minimum flow recirculation valve 6 to be opened, and the opening time of the minimum flow recirculation valve 6 is tested;
the simulation modeling server 14 triggers a tripping signal of the main feed pump, the tripping signal is transmitted to a main feed pump driving clamping piece 12-3 by a main feed pump simulation module 14-3 through a main feed pump A/D conversion clamping piece 13-3 and drives the feed pump 4 to stop, and a stop response characteristic curve of the main feed pump 4 is tested; meanwhile, the standby water-feeding pump 5 is driven to start by a standby water-feeding pump driving clamping piece 12-6, and a starting response characteristic curve of the standby water-feeding pump 5 is tested;
the simulation modeling server 14 triggers a trip signal of the water supply pre-pump 3, the water supply pre-pump drives the clamping piece 12-7 and drives the water supply pre-pump 3 to stop, the stop signal of the water supply pre-pump 3 is transmitted to the water supply pre-pump simulation module 14-7 through the A/D conversion clamping piece 13-7 of the water supply pre-pump, the standby water supply pump simulation module 14-6 in the simulation modeling server 14 receives the trip signal of the water supply pre-pump 3, the standby water supply pump A/D conversion clamping piece 13-6 transmits the trip signal to the standby water supply pump driving clamping piece 12-6 and drives the standby water supply pump 5 to stop, and the stop response characteristic curve of the standby water supply pump 5 is tested.
(3) Function verification of the minimum flow recirculation valve:
initial state: the method comprises the steps of normally operating the feed water pre-pump 3, normally operating the main feed water pump 4, fully opening the minimum flow recirculation valve 6 and fully closing the main feed water pump isolation valve 7.
The minimum flow recirculation valve simulation module 14-2 is provided with a minimum flow recirculation valve 6 which is not fully opened (the opening degree is less than 90%), and the minimum flow recirculation valve A/D conversion card 13-2 transmits the minimum flow recirculation valve to the minimum flow recirculation valve driving card 12-2 and drives the minimum flow recirculation valve 6 to be closed to be less than 90%; meanwhile, when a feed water flow measuring device simulation module 14-9 receives a signal that the feed water flow is less than 90t/h, a main feed water pump simulation module 14-3 in a simulation modeling server 14 receives a signal that a minimum flow recirculation valve 6 is not fully opened and the feed water flow is low and triggers a main feed water pump trip signal, and the main feed water pump simulation module 14-3 transmits the signal to a main feed water pump driving clamping piece 12-3 through a main feed water pump A/D conversion clamping piece 13-3 and drives a feed water pump 4 to stop;
the minimum flow recirculation valve simulation module 14-2 is provided with a minimum flow recirculation valve 6 which is gradually opened to 30%, 50% and 100%, the minimum flow recirculation valve A/D conversion card 13-2 is transmitted to a minimum flow recirculation valve driving card 12-2 and drives the minimum flow recirculation valve to be opened to a corresponding opening degree, and an opening characteristic curve of the minimum flow recirculation valve 6 is tested;
the minimum flow recirculation valve 6 is arranged in the minimum flow recirculation valve simulation module 14-2 to be gradually closed to 75%, 50% and 0%, the minimum flow recirculation valve A/D conversion card 13-2 transmits the minimum flow recirculation valve A/D conversion card to the minimum flow recirculation valve driving card 12-2 and drives the minimum flow recirculation valve 6 to be closed to a corresponding opening degree, and a closing characteristic curve of the minimum flow recirculation valve 6 is tested.
(4) The functions of the main water supply isolation valve and the main water supply regulating valve are verified:
initial state: the method comprises the steps that a water supply pre-pump 3 runs normally, a main water supply pump 4 runs normally, a minimum flow recirculation valve 6 is fully opened, a main water supply pump isolation valve 7 and a main water supply adjusting valve 8 are fully closed, the liquid level in a deaerator 1 is normal (1400-2500 mm), and the water supply flow is normal (more than 90 t/h).
The simulation modeling server 14 triggers a water supply signal of the steam generator 9, a main water supply isolation valve simulation module 14-5 transmits the water supply signal to a main water supply isolation valve driving clamping piece 12-5 through a main water supply isolation valve A/D conversion clamping piece 13-5 and drives the main water supply isolation valve 7 to be opened, and the opening time of the main water supply isolation valve 7 is tested; the main water supply regulating valve simulation module 14-4 transmits the signal to a main water supply regulating valve driving clamping piece 12-4 through a main water supply regulating valve A/D conversion clamping piece 13-4 and drives the main water supply regulating valve 8 to be gradually opened, and a main water supply regulating valve 8 regulation response characteristic curve is tested; meanwhile, the minimum flow recirculation valve simulation module 14-2 transmits the signals to the minimum flow recirculation valve driving card 12-2 through the minimum flow recirculation valve A/D conversion card 13-2 and drives the minimum flow recirculation valve 6 to be gradually closed, and the adjustment response characteristic curve of the minimum flow recirculation valve 6 is tested. The feed water flow is monitored by a feed water flow measuring device until the steam generator 9 is increased from the starting feed water flow 129.6t/h to the rated feed water flow 345.6 t/h.
In the test process, the controller parameters in the simulation modeling server 14 are repeatedly adjusted until the inlet isolation valve 2 of the feed water pre-pump, the minimum flow recirculation valve 6, the main feed water isolation valve 7 and the main feed water regulating valve 8 meet the design function, and the feed water pre-pump 3, the main feed water pump 4 and the standby feed water pump 5 meet the design function.
Claims (4)
1. A testing device for verifying functions of a secondary loop water supply system of a nuclear power station is characterized by comprising:
the deaerator (1) is communicated with an inlet of the water supply preposed pump inlet isolating valve (2) and is used for removing gas in water;
the outlet of the inlet isolating valve (2) of the feed water pre-pump is communicated with the inlet of the feed water pre-pump (3) and is used for preventing the inlet of the feed water pre-pump (3) from leaking;
the outlet of the water supply pre-pump (3) is divided into two paths: be linked together with main water-feeding pump (4) entry all the way, another way is linked together with reserve water-feeding pump (5) entry for improve the pressure that gets into main water-feeding pump (4) and reserve water-feeding pump (5), main water-feeding pump (4) and reserve water-feeding pump (5) export are joined the back and are divided into three routes:
the first path is communicated with an inlet of a minimum flow recirculation valve (6), and an outlet of the minimum flow recirculation valve (6) is communicated with an inlet of a deaerator (1);
the second path is communicated with an inlet of a main water supply isolation valve (7), an outlet of the main water supply isolation valve (7) is communicated with an inlet of a main water supply regulating valve (8), and an outlet of the main water supply regulating valve (8) is communicated with an inlet of a steam generator (9);
the third path is communicated with an inlet of a water supply flow measuring device (11);
the system comprises a water supply pre-pump inlet isolation valve (2), a water supply pre-pump (3), a main water supply pump (4), a standby water supply pump (5), a minimum flow recirculation valve (6), a main water supply isolation valve (7), a main water supply regulating valve (8), a deaerator liquid level monitoring device (10) and a water supply flow measuring device (11), wherein the water supply pre-pump inlet isolation valve, the main water supply regulating valve (8), the deaerator liquid level monitoring device and the water supply flow measuring device are respectively connected with a simulation modeling server (14) through a two-loop water supply system DCS cabinet (12) through a PXI data acquisition cabinet (13).
2. The testing device for the functional verification of the secondary loop water supply system of the nuclear power station as claimed in claim 1, wherein a deaerator liquid level monitoring device (10) is arranged inside the deaerator (1), and the deaerator liquid level monitoring device (10) is used for monitoring the liquid level in the deaerator (1).
3. The testing device for the functional verification of the secondary-loop water supply system of the nuclear power station according to claim 1, wherein the secondary-loop water supply system DCS cabinet (12) comprises a DCS cabinet body, and a deaerator liquid level measuring clamp (12-1), a minimum flow recirculation valve driving clamp (12-2), a main water supply pump driving clamp (12-3), a main water supply regulating valve driving clamp (12-4), a main water supply isolation valve driving clamp (12-5), a standby water supply pump driving clamp (12-6), a water supply preposed pump driving clamp (12-7), a water supply preposed flow measuring pump inlet isolation valve driving clamp (12-8) and a water supply device driving clamp (12-9) which are arranged in the DCS cabinet body;
wherein, a deaerator liquid level measuring fastener (12-1) is connected with a deaerator liquid level monitoring device (10), a minimum flow recirculation valve driving fastener (12-2) is connected with a minimum flow recirculation valve (6), a main feed pump driving fastener (12-3) is connected with a main feed pump (4), the main feed valve driving fastener (12-4) is connected with a main feed regulating valve (8), the main feed isolating valve driving fastener (12-5) is connected with a main feed isolating valve (7), a standby feed pump driving fastener (12-6) is connected with a standby feed pump (5), a feed preposed pump driving fastener (12-7) is connected with a feed preposed pump (3), and a feed preposed pump inlet isolating valve driving fastener (12-8) is connected with a feed preposed pump inlet isolating valve (2), the driving clamping piece (12-9) of the feed water flow measuring device is connected with the feed water flow measuring device (11).
4. The testing device for functional verification of the secondary loop water supply system of the nuclear power station as claimed in claim 3, wherein the PXI data acquisition cabinet (13) comprises a data acquisition cabinet body, and a deaerator liquid level measurement A/D conversion clamping piece (13-1), a minimum flow recirculation valve A/D conversion clamping piece (13-2), a main water supply pump A/D conversion clamping piece (13-3), a main water supply regulating valve A/D conversion clamping piece (13-4), a main water supply isolation valve A/D conversion clamping piece (13-5), a standby water supply pump A/D conversion clamping piece (13-6), a water supply preposed pump A/D conversion clamping piece (13-7), a water supply preposed pump inlet isolation valve A/D conversion clamping piece (13-8) and a water supply flow measurement device A/D conversion clamping piece (13-9) which are arranged in the data acquisition cabinet body ) (ii) a
The simulation modeling server (14) comprises a deaerator liquid level measurement simulation module (14-1), a minimum flow recirculation valve simulation module (14-2), a main feed pump simulation module (14-3), a main feed regulating valve simulation module (14-4), a main feed isolation valve simulation module (14-5), a standby feed pump simulation module (14-6), a feed prepositive pump simulation module (14-7), a feed prepositive pump inlet isolation valve simulation module (14-8) and a feed flow measurement device simulation module (14-9);
the deaerator liquid level measurement simulation module (14-1) is connected with the deaerator liquid level measurement clamping piece (12-1) through a deaerator liquid level measurement A/D conversion clamping piece (13-1); the minimum flow recirculation valve simulation module (14-2) is connected with a minimum flow recirculation valve driving clamping piece (12-2) through a minimum flow recirculation valve A/D conversion clamping piece (13-2); the main water-feeding pump simulation module (14-3) is connected with a main water-feeding pump driving clamping piece (12-3) through a main water-feeding pump A/D conversion clamping piece (13-3); the main water supply regulating valve simulation module (14-4) is connected with a main water supply regulating valve driving clamping piece (12-4) through a main water supply regulating valve A/D conversion clamping piece (13-4); the main water supply isolation valve simulation module (14-5) is connected with a main water supply isolation valve driving clamping piece (12-5) through a main water supply isolation valve A/D conversion clamping piece (13-5); the standby water-feeding pump simulation module (14-6) is connected with a standby water-feeding pump driving clamping piece (12-6) through a standby water-feeding pump A/D conversion clamping piece (13-6); the water supply preposed pump simulation module (14-7) is connected with a water supply preposed pump driving clamping piece (12-7) through a water supply preposed pump A/D conversion clamping piece (13-7); the simulation module (14-8) of the inlet isolating valve of the water supply preposed pump is connected with the driving clamping piece (12-8) of the inlet isolating valve of the water supply preposed pump through the A/D conversion clamping piece (13-8) of the inlet isolating valve of the water supply preposed pump; the simulation module (14-9) of the water supply flow measuring device is connected with the driving clamping piece (12-9) of the water supply flow measuring device through an A/D conversion clamping piece (13-9) of the water supply flow measuring device.
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