A test device and method for verifying the function of a nuclear power plant steam turbine regulation and safety system

Abstract

A test device and method for verifying the function of a nuclear power plant turbine regulation and safety system, comprising a control oil tank, a cooling oil pump, an electric heater inlet valve, an electric heater, an electric heater outlet valve, an oil cooler inlet valve, an oil cooler, an oil cooler outlet valve, a first control oil pump, a second control oil pump, an emergency shutoff device, and a turbine steam inlet valve group. An oil temperature monitoring device, an oil pressure monitoring device, and an oil level monitoring device are arranged inside the control oil tank; the turbine steam inlet valve group is composed of a turbine main steam valve and a regulating valve. Each turbine regulation and safety system is connected to a simulation modeling server through a turbine regulation and safety system DCS cabinet via a PXI data acquisition cabinet. The present invention can realize early verification of the actual function of the turbine regulation and safety system and improve test efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power, and in particular relates to a testing device and method for verifying the function of a steam turbine regulating and safety system of a nuclear power plant. Background Art

[0002] The nuclear power plant steam turbine regulating and safety system is the main control system of the secondary circuit of the nuclear power plant. During the operation of the steam turbine, the system supplies control oil to the main steam valve and regulating steam valve of the steam turbine and controls the opening of the steam turbine valve.

[0003] The steam turbine regulation and safety system of a nuclear power plant consists of a control oil tank, cooling oil pump, control oil pump, steam turbine inlet valve group, and pipelines. In order to ensure the safe and stable operation of the nuclear power plant, the functional verification of the control logic of the steam turbine regulation and safety system of the nuclear power plant is very important. During the single system commissioning, the system needs to be tested by simulating the operating conditions to ensure the equipment availability and functional integrity.

[0004] In the traditional testing process, testers often modify the logic of the nuclear power plant digital control system (DCS), manually wire the system control cabinet, manually force the signal, and manually read the DCS display status to test. This test method has at least the following problems: when the operating conditions of the steam turbine regulation and safety system are complex and there are many measurements, the above manual test method has the disadvantages of reading errors and errors in the test results, and the test efficiency is low; at the same time, the DCS logic needs to be modified during the test to simulate various operating states of the system. Since the steam turbine regulation and safety system involves the full process operating conditions of the unit start-up, stop and power operation stage, the DCS logic involved has a wide range. Directly modifying the DCS logic during the test will bring hidden dangers to the subsequent stable operation of the unit. The applicability of the above test method is poor. Therefore, it is necessary to develop a test device for functional verification of the steam turbine regulation and safety system of nuclear power plants. Summary of the invention

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a test device and method for verifying the function of a nuclear power plant turbine regulating and safety system, which can realize early verification of the actual function of the nuclear power plant turbine regulating and safety system and improve the testing efficiency.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A test device for verifying the function of a steam turbine regulation and safety system in a nuclear power plant comprises a control oil tank 1, wherein a first outlet of the control oil tank 1 is connected to an inlet of a cooling oil pump 2, the cooling oil pump 2 is used to control the driving power of the control oil in the control oil tank 1, and the outlet of the cooling oil pump 2 is divided into two paths: one path is connected to an inlet of an electric heater 4 through an electric heater inlet valve 3, and the outlet of the electric heater 4 is connected to an outlet valve 5 of the electric heater; the other path is connected to an inlet of an oil cooler 7 through an inlet valve 6 of an oil cooler, and the outlet of the oil cooler 7 is connected to an outlet valve 8 of the oil cooler, and the outlets of the electric heater outlet valve 5 and the oil cooler outlet valve 8 are connected to the inlet of the control oil tank 1 after the outlets are merged;

[0008] The second outlet of the control oil tank 1 is divided into two routes: one route is connected to the inlet of the first control oil pump 9, and the other route is connected to the inlet of the second control oil pump 10. The first control oil pump 9 and the second control oil pump 10 are connected to the inlet of the emergency trip device 11 after merging. The outlet of the emergency trip device 11 is divided into two routes: one route is connected to the inlet of the steam turbine inlet valve group 12, and the other route is connected to the control oil tank 1. The outlet of the steam turbine inlet valve group 12 is connected to the emergency trip device 11;

[0009] The cooling oil pump 2, electric heater inlet valve 3, electric heater 4, electric heater outlet valve 5, oil cooler inlet valve 6, oil cooler 7, oil cooler outlet valve 8, first control oil pump 9, second control oil pump 10, emergency shut-off device 11, turbine steam inlet valve group 12, oil temperature monitoring device 13, oil pressure monitoring device 14 and oil level monitoring device 15 are respectively connected to the simulation modeling server 18 through the turbine regulation and safety system DCS cabinet 16 via the PXI data acquisition cabinet 17. The oil temperature monitoring device 13, oil pressure monitoring device 14 and oil level monitoring device 15 transmit the monitored information to the simulation modeling server 18. The simulation modeling server 18 transmits the information to the emergency shutdown system DCS cabinet 16 through the PXI data acquisition cabinet 17. The emergency shutdown system DCS cabinet 16 is used to control the start and stop of each component. The control oil tank 1 is provided with an oil temperature monitoring device 13, an oil pressure monitoring device 14 and an oil level monitoring device 15. The oil temperature monitoring device 13 is used to monitor the oil temperature in the control oil tank 1, the oil pressure monitoring device 14 is used to monitor the oil pressure in the control oil tank 1, and the oil level monitoring device 15 is used to monitor the oil level height in the control oil tank 1. The turbine steam inlet valve group 12 is composed of a turbine main steam valve and a regulating valve.

[0010] The steam turbine regulating and safety system DCS cabinet 16 comprises a DCS cabinet body and a cooling oil pump drive card 16-1, an electric heater inlet valve drive card 16-2, an electric heater drive card 16-3, an electric heater outlet valve drive card 16-4, an oil cooler outlet valve drive card 16-5, an oil cooler drive card 16-6, an oil cooler inlet valve drive card 16-7, an oil temperature monitoring device measuring card 16-8, an oil pressure monitoring device measuring card 16-9, an oil level monitoring device measuring card 16-10, a first control oil pump drive card 16-11, an emergency trip device drive card 16-12, a steam turbine steam inlet valve group drive card 16-13 and a second control oil pump drive card 16-14 arranged in the DCS cabinet body;

[0011] Among them, the cooling oil pump drive card 16-1 is connected to the cooling oil pump 2, the electric heater inlet valve drive card 16-2 is connected to the electric heater inlet valve 3, the electric heater drive card 16-3 is connected to the electric heater 4, the electric heater outlet valve drive card 16-4 is connected to the electric heater outlet valve 5, the oil cooler inlet valve drive card 16-7 is connected to the oil cooler inlet valve 6, the oil cooler drive card 16-6 is connected to the oil cooler 7, the oil cooler outlet valve drive card 16-5 is connected to the oil cooler outlet valve 8, the oil temperature monitoring device measurement card 16-8 is connected to the oil temperature monitoring device 13, the oil pressure monitoring device measuring card 16-9 is connected to the oil pressure monitoring device 14, the oil level monitoring device measuring card 16-10 is connected to the oil level monitoring device 15, the first control oil pump drive card 16-11 is connected to the first control oil pump 9, the emergency shut-off device drive card 16-12 is connected to the emergency shut-off device 11, the second control oil pump drive card 16-14 is connected to the second control oil pump 10, and the turbine steam inlet valve group drive card 16-13 is connected to the turbine steam inlet valve group 12.

[0012] The PXI data acquisition cabinet 17 includes a data acquisition cabinet body and a cooling oil pump drive A / D conversion card 17-1, an electric heater inlet valve A / D conversion card 17-2, an electric heater A / D conversion card 17-3, an electric heater outlet valve A / D conversion card 17-4, an oil cooler outlet valve A / D conversion card 17-5, an oil cooler A / D conversion card 17-6, an oil cooler inlet valve A / D conversion card 17-7, an oil temperature monitoring device measurement A / D conversion card 17-8, an oil pressure monitoring device measurement A / D conversion card 17-9, an oil level monitoring device measurement A / D conversion card 17-10, a first control oil pump A / D conversion card 17-11, an emergency trip device A / D conversion card 17-12, a turbine steam inlet valve group A / D conversion card 17-13, and a second control oil pump A / D conversion card 17-14;

[0013] The simulation modeling server 18 includes a cooling oil pump simulation module 18-1, an electric heater inlet valve simulation module 18-2, an electric heater simulation module 18-3, an electric heater outlet valve simulation module 18-4, an oil cooler outlet valve simulation module 18-5, an oil cooler simulation module 18-6, an oil cooler inlet valve simulation module 18-7, an oil temperature monitoring device measurement simulation module 18-8, an oil pressure monitoring device measurement simulation module 18-9, an oil level monitoring device measurement simulation module 18-10, a first control oil pump simulation module 18-11, an emergency trip device simulation module 18-12, a turbine steam inlet valve group simulation module 18-13, and a second control oil pump simulation module 18-14;

[0014] Among them, the cooling oil pump simulation module 18-1 is connected to the cooling oil pump drive card 16-1 through the cooling oil pump drive A / D conversion card 17-1; the electric heater inlet valve simulation module 18-2 is connected to the electric heater inlet valve drive card 16-2 through the electric heater inlet valve A / D conversion card 17-2; the electric heater simulation module 18-3 is connected to the electric heater drive card 16-3 through the electric heater A / D conversion card 17-3; the electric heater outlet valve simulation module 18-4 is connected to the electric heater outlet valve A / D conversion card 17-4 The oil cooler outlet valve simulation module 18-5 is connected to the oil cooler outlet valve drive card 16-5 via the oil cooler outlet valve A / D conversion card 17-5; the oil cooler simulation module 18-6 is connected to the oil cooler drive card 16-6 via the oil cooler A / D conversion card 17-6; the oil cooler inlet valve simulation module 18-7 is connected to the oil cooler inlet valve drive card 16-7 via the oil cooler inlet valve A / D conversion card 17-7; the oil temperature monitoring device measurement simulation module 18-8 is connected to the oil temperature monitoring device via the oil temperature monitoring device The measuring device A / D conversion card 17-8 is connected to the oil temperature monitoring device measuring card 16-8; the oil pressure monitoring device measuring simulation module 18-9 is connected to the oil pressure monitoring device measuring card 16-9 via the oil pressure monitoring device measuring A / D conversion card 17-9; the oil level monitoring device measuring simulation module 18-10 is connected to the oil level monitoring device measuring card 16-10 via the oil level monitoring device measuring A / D conversion card 17-10; the first control oil pump simulation module 18-11 is connected to the first control oil pump A / D conversion card 17-11 The first control oil pump drive card 16-11 is connected; the emergency shut-off device simulation module 18-12 is connected to the emergency shut-off device drive card 16-12 via the emergency shut-off device A / D conversion card 17-12; the turbine steam inlet valve group simulation module 18-13 is connected to the turbine steam inlet valve group drive card 16-13 via the turbine steam inlet valve group A / D conversion card 17-13; the second control oil pump simulation module 18-14 is connected to the second control oil pump drive card 16-14 via the second control oil pump A / D conversion card 17-14.

[0015] A method for using a test device for verifying the function of a nuclear power plant steam turbine regulation and safety system, the test contents including: (1) verification of the operation logic of a cooling oil pump 2 and an electric heater 4; (2) verification of the operation logic of a cooling oil pump 2 and an oil cooler 7; (3) verification of the start, switch and stop logic of a control oil pump; (4) testing of an emergency trip device 11 and a steam turbine inlet valve group 12;

[0016] During the above test process, the controller parameters in the simulation modeling server 18 are repeatedly adjusted until the response time of each component meets the design function and the operating characteristics meet the design function.

[0017] The specific operation steps of the operation logic verification of the cooling oil pump 2 and the electric heater 4 are as follows:

[0018] The oil temperature in the control oil tank 1 is set lower than the normal operating temperature in the oil temperature monitoring device measurement simulation module 18-8, and the output low oil temperature trigger signal is transmitted to the oil temperature monitoring device measurement card 16-8 through the oil temperature monitoring device measurement A / D conversion card 17-8, and then transmitted to the oil temperature monitoring device 13. The oil temperature monitoring device 13 signal is transmitted to the turbine regulation and safety system DCS cabinet 16, and the cooling oil pump drive card 16-1 drives the cooling oil pump 2 to start, and at the same time, the electric heater inlet valve drive card 16-2 drives the electric heater inlet valve 3 to open quickly, and the electric heater drive card 16-3 drives the electric heater 4 to be put into operation, and the electric heater outlet valve drive card 16-4 drives the electric heater outlet valve 5 to open quickly, and the cooling oil pump 2 provides the control oil driving power in the control oil tank 1, and circulates the heating until the oil temperature in the control oil tank 1 is normal.

[0019] The specific operation steps of the operation logic verification of the cooling oil pump 2 and the oil cooler 7 are as follows:

[0020] The oil temperature in the control oil tank 1 is set higher than the normal operating temperature in the oil temperature monitoring device measurement simulation module 18-8, and the output oil temperature high trigger signal is transmitted to the oil temperature monitoring device measurement card 16-8 through the oil temperature monitoring device measurement A / D conversion card 17-8, and then transmitted to the oil temperature monitoring device 13. The oil temperature monitoring device 13 signal is transmitted to the turbine regulation and safety system DCS cabinet 16, and the cooling oil pump driving card 16-1 drives the cooling oil pump 2 to start, and at the same time, the cooler inlet valve driving card 16-7 drives the cooler inlet valve 6 to open quickly, the cooler driving card 16-6 drives the cooler 7 to be put into operation, and the cooler outlet valve driving card 16-5 drives the cooler outlet valve 8 to open quickly, and the cooling oil pump 2 provides the control oil driving power in the control oil tank 1, and the circulation cooling is carried out until the oil temperature in the control oil tank 1 is normal.

[0021] The specific operation steps of the control oil pump start, switch, stop logic verification are as follows:

[0022] Start-up permission conditions: the oil temperature monitoring device 13 in the control oil tank 1 shows that the oil temperature is normal, and the oil level monitoring device 15 shows that the oil level is normal;

[0023] The simulation modeling server 18 triggers the oil pump start signal, which is transmitted by the first control oil pump simulation module 18-11 to the first control oil pump drive card 16-11 through the first control oil pump A / D conversion card 17-11 and drives the first control oil pump 9 to start; the start response characteristic curve of the first control oil pump 9 is tested;

[0024] The oil pressure in the control oil tank 1 is set to be lower than the normal operating oil pressure in the oil pressure monitoring device measurement simulation module 18-9, and the output low oil pressure trigger signal is transmitted to the oil pressure monitoring device measurement card 16-9 through the oil pressure monitoring device measurement A / D conversion card 17-9, and then transmitted to the oil pressure monitoring device 14. The oil pressure monitoring device 14 signal is transmitted to the turbine regulation and safety system DCS cabinet 16, and the second control oil pump driving card 16-14 drives the second control oil pump 10 to start until the control oil pressure is normal, and the start-up response characteristic curve of the second control oil pump 10 is tested;

[0025] The oil level in the control oil tank 1 is set lower than the normal operating oil level in the oil level monitoring device measurement simulation module 18-10, and the output low oil level trigger signal is transmitted to the oil level monitoring device measurement card 16-10 through the oil level monitoring device measurement A / D conversion card 17-10, and then transmitted to the oil level monitoring device 15. The oil level monitoring device 15 signal is transmitted to the turbine regulation and safety system DCS cabinet 16, and the first control oil pump drive card 16-11 drives the first control oil pump 9 to stop; the second control oil pump drive card 16-14 drives the second control oil pump 10 to stop, and the stop characteristic curves of the first control oil pump 9 and the second control oil pump 10 are tested.

[0026] The specific steps for testing the emergency trip device 11 and the steam turbine inlet valve group 12 are as follows:

[0027] Initial conditions: the first control oil pump 9 or the second control oil pump 10 operates normally, and the oil temperature monitoring device 13, the oil pressure monitoring device 14 and the oil level monitoring device 15 display normal;

[0028] The simulation modeling server 18 triggers the steam turbine start signal, which is transmitted from the emergency trip device simulation module 18-12 to the emergency trip device drive card 16-12 through the emergency trip device A / D conversion card 17-12 and drives the emergency trip device 11 to conduct the control oil to the oil circuit of the turbine steam inlet valve group 12. The oil pressure is established, and the steam turbine steam inlet valve group drive card 16-13 drives the main steam valve in the steam turbine steam inlet valve group 12 to open quickly, and tests whether the opening time of the main steam valve in the steam turbine steam inlet valve group 12 meets the design specifications;

[0029] The simulation modeling server 18 triggers the turbine stop signal, which is transmitted by the emergency shut-off device simulation module 18-12 to the emergency shut-off device drive card 16-12 through the emergency shut-off device A / D conversion card 17-12 and drives the emergency shut-off device 11 to shut off the oil circuit of the control oil to the turbine steam inlet valve group 12, and the control oil flows back to the control oil tank 1. The main steam valve and regulating valve in the turbine steam inlet valve group 12 are driven by the turbine steam inlet valve group drive card 16-13 to close quickly, and test whether the closing time of the main steam valve and regulating valve in the turbine steam inlet valve group 12 meets the design specifications.

[0030] Beneficial effects of the present invention:

[0031] The test device and method can realize the logic rehearsal and dynamic test of the steam turbine regulation and safety 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 steam turbine regulation and safety system during the operation of the unit. In actual operation, the control ideas of the steam turbine regulation and safety system can be configured, debugged, tested and optimized, and can communicate with the DCS system in real time, and synchronize the verified and mature control configuration to the DCS system, overcoming the problem that the DCS system does not have the ability to verify its design function by repeatedly modifying the configuration logic. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of the present invention.

[0033] The control oil tank 1, cooling oil pump 2, electric heater inlet valve 3, electric heater 4, electric heater outlet valve 5, oil cooler inlet valve 6, oil cooler 7, oil cooler outlet valve 8, first control oil pump 9, second control oil pump 10, emergency shutoff device 11, turbine steam inlet valve group 12, oil temperature monitoring device 13, oil pressure monitoring device 14 and oil level monitoring device 15, turbine regulation and safety system DCS cabinet 16, cooling oil pump drive card 16-1, electric heater inlet valve drive card 16-2, electric heater drive Card 16-3, electric heater outlet valve drive card 16-4, oil cooler outlet valve drive card 16-5, oil cooler drive card 16-6, oil cooler inlet valve drive card 16-7, oil temperature monitoring device measurement card 16-8, oil pressure monitoring device measurement card 16-9, oil level monitoring device measurement card 16-10, first control oil pump drive card 16-11, emergency trip device drive card 16-12 and second control oil pump drive card 16-13, second control oil pump drive card 16-14;

[0034] PXI data acquisition cabinet 17, cooling oil pump drive A / D conversion card 17-1, electric heater inlet valve A / D conversion card 17-2, electric heater A / D conversion card 17-3, electric heater outlet valve A / D conversion card 17-4, oil cooler outlet valve A / D conversion card 17-5, oil cooler A / D conversion card 17-6, oil cooler inlet valve A / D conversion card 17-7, oil temperature monitoring device measurement A / D conversion card 17-8, oil pressure monitoring device measurement A / D conversion card 17-9, oil level monitoring device measurement A / D conversion card 17-10, first control oil pump A / D conversion card 17-11, emergency shutoff device A / D conversion card 17-12 and second control oil pump A / D conversion card 17-13;

[0035] Simulation modeling server 18, cooling oil pump simulation module 18-1, electric heater inlet valve simulation module 18-2, electric heater simulation module 18-3, electric heater outlet valve simulation module 18-4, oil cooler inlet valve simulation module 18-5, oil cooler simulation module 18-6, oil cooler outlet valve simulation module 18-7, oil temperature monitoring device measurement simulation module 18-8, oil pressure monitoring device measurement simulation module 18-9, oil level monitoring device measurement simulation module 18-10, first control oil pump simulation module 18-11, emergency shut-off device simulation module 18-12, second control oil pump simulation module 18-13, second control oil pump simulation module 18-14. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with embodiments.

[0037] refer to Figure 1 :

[0038] Embodiment 1:

[0039] Taking the 200MW high temperature gas-cooled reactor unit as an example, two sets of nuclear steam supply systems are connected to a steam turbine to form a nuclear power unit solution. The control oil uses high-pressure fire-resistant oil, which can work at 65°C for a long time without physical or chemical deterioration. The normal working pressure range of the control oil system is 13.5-14MPa, the normal working temperature range is 37-60°C, and the normal working liquid level range is 295.15-558.8mm. It is equipped with an oil cooler, an electric heater, a cooling oil pump and two control oil pumps. The turbine steam inlet valve group consists of two main steam valves and four regulating steam valves.

[0040] The specific working process of the present invention is:

[0041] 1) Logic verification of cooling oil pump 2 and electric heater 4:

[0042] The oil temperature in the control oil tank 1 is set lower than the normal operating temperature (<37°C) in the oil temperature monitoring device measurement simulation module 18-8, and the output oil temperature low trigger signal is transmitted to the oil temperature monitoring device measurement card 16-8 through the oil temperature monitoring device measurement A / D conversion card 17-8, and then transmitted to the oil temperature monitoring device 13. The oil temperature monitoring device 13 transmits the signal to the turbine regulation and security system DCS cabinet 16, and the cooling oil pump driving card 16-1 drives the cooling oil pump 2 to start, and the electric heater inlet valve driving card 16-2 drives the electric heater inlet valve 3 to open quickly, the electric heater driving card 16-3 drives the electric heater 4 to start, and the electric heater outlet valve driving card 16-4 drives the electric heater outlet valve 5 to open quickly. The cooling oil pump 2 provides the control oil driving power in the control oil tank 1, and circulates the heating until the oil temperature in the control oil tank 1 is normal (37-60°C).

[0043] 2) Logic verification of the operation of cooling oil pump 2 and oil cooler 7:

[0044] The oil temperature in the control oil tank 1 is set higher than the normal operating temperature (>60°C) in the oil temperature monitoring device measurement simulation module 18-8, and the output oil temperature high trigger signal is transmitted to the oil temperature monitoring device measurement card 16-8 through the oil temperature monitoring device measurement A / D conversion card 17-8, and then transmitted to the oil temperature monitoring device 13. The oil temperature monitoring device 13 transmits the signal to the turbine regulation and security system DCS cabinet 16, and the cooling oil pump driving card 16-1 drives the cooling oil pump 2 to start, and the oil cooler inlet valve driving card 16-7 drives the oil cooler inlet valve 6 to open quickly, the oil cooler driving card 16-6 drives the oil cooler 7 to be put into operation, and the oil cooler outlet valve driving card 16-5 drives the oil cooler outlet valve 8 to open quickly. The cooling oil pump 2 provides the control oil driving power in the control oil tank 1, and the circulation cooling is carried out until the oil temperature in the control oil tank 1 is normal (37-60°C).

[0045] 3) Verification of the control oil pump start, switch, and stop logic: Start permission conditions: The oil temperature monitoring device 13 in the control oil tank 1 shows that the oil temperature is normal (37-60°C), and the oil level monitoring device 15 shows that the oil level is normal (295.15-558.8mm). The simulation modeling server 18 triggers the oil pump start signal, which is transmitted from the first control oil pump simulation module 18-11 to the first control oil pump drive card 16-11 through the first control oil pump A / D conversion card 17-11 and drives the first control oil pump 9 to start; the first control oil pump 9 start response characteristic curve is tested; the oil pressure in the control oil tank 1 is set to be lower than the normal operating oil pressure (<13MPa) in the oil pressure monitoring device measurement simulation module 18-9, and the output low oil pressure trigger signal is transmitted to the oil pressure monitoring device measurement card 16-9 through the oil pressure monitoring device measurement A / D conversion card 17-9, and then transmitted to the oil pressure monitoring device 14. The signal of the oil pressure monitoring device 14 is transmitted to the DCS cabinet 16 of the steam turbine regulation and safety system, and the second control oil pump driving card 16-14 drives the second control oil pump 10 to start until the control oil pressure is normal (13.5-14MPa). Test the start-up response characteristic curve of the second control oil pump 10; the oil level in the control oil tank 1 is set lower than the normal operating oil level (<290mm) in the oil level monitoring device measurement simulation module 18-10, and the output low oil level trigger signal is transmitted to the oil level monitoring device measurement card 16-10 through the oil level monitoring device measurement A / D conversion card 17-10, and then transmitted to the oil level monitoring device 15, and the oil level monitoring device 15 signal is transmitted to the DCS cabinet 16 of the steam turbine regulation and safety system, and the first control oil pump driving card 16-11 drives the first control oil pump 9 to stop; the second control oil pump driving card 16-14 drives the second control oil pump 10 to stop, and the first control oil pump 9 and the second control oil pump 10 stop characteristic curves are tested. 4) Test of emergency shut-off device 11 and steam turbine inlet valve group 12: Initial conditions: The first control oil pump 9 or the second control oil pump 10 operates normally, and the oil temperature monitoring device 13, the oil pressure monitoring device 14 and the oil level monitoring device 15 display normal. The simulation modeling server 18 triggers the turbine start signal, which is transmitted to the emergency shut-off device drive card 16-12 through the emergency shut-off device A / D conversion card 17-12 by the emergency shut-off device simulation module 18-12 and drives the emergency shut-off device 11 to conduct the control oil to the oil circuit of the steam turbine inlet valve group 12, and the oil pressure is established. The steam turbine inlet valve group drive card 16-13 drives the main steam valve in the steam turbine inlet valve group 12 to open quickly, and the opening time of the main steam valve in the steam turbine inlet valve group 12 is tested.

[0046] The simulation modeling server 18 triggers the turbine stop signal, which is transmitted from the emergency shutoff device simulation module 18-12 to the emergency shutoff device drive card 16-12 through the emergency shutoff device A / D conversion card 17-12, and drives the emergency shutoff device 11 to shut off the oil path from the control oil to the turbine steam inlet valve group 12, and the control oil flows back to the control oil tank 1. The main steam valve and the regulating valve in the turbine steam inlet valve group 12 are driven by the turbine steam inlet valve group drive card 16-13 to close quickly, and test whether the closing time of the main steam valve and the regulating valve in the turbine steam inlet valve group 12 meets the design specification (<300ms).

Claims

1. A test device for verifying the function of a steam turbine regulating and safety system in a nuclear power plant, comprising a control oil tank (1), wherein a first outlet of the control oil tank (1) is connected to an inlet of a cooling oil pump (2), and the cooling oil pump (2) is used to drive power of control oil in the control oil tank (1), characterized in that: The outlet of the cooling oil pump (2) is divided into two paths: one path is connected to the inlet of the electric heater (4) through the electric heater inlet valve (3), and the outlet of the electric heater (4) is connected to the outlet valve (5) of the electric heater; the other path is connected to the inlet of the oil cooler (7) through the oil cooler inlet valve (6), and the outlet of the oil cooler (7) is connected to the outlet valve (8) of the oil cooler, and the outlets of the electric heater outlet valve (5) and the oil cooler outlet valve (8) are connected to the inlet of the control oil tank (1) after the outlets are merged; The second outlet of the control oil tank (1) is divided into two paths: one path is connected to the inlet of the first control oil pump (9), and the other path is connected to the inlet of the second control oil pump (10). The first control oil pump (9) and the second control oil pump (10) are connected to the inlet of the emergency shutoff device (11) after merging. The outlet of the emergency shutoff device (11) is divided into two paths: one path is connected to the inlet of the steam turbine inlet valve group (12), and the other path is connected to the control oil tank (1). The outlet of the steam turbine inlet valve group (12) is connected to the emergency shutoff device (11); The cooling oil pump (2), the electric heater inlet valve (3), the electric heater (4), the electric heater outlet valve (5), the oil cooler inlet valve (6), the oil cooler (7), the oil cooler outlet valve (8), the first control oil pump (9), the second control oil pump (10), the emergency shutoff device (11), the steam turbine steam inlet valve group (12), the oil temperature monitoring device (13), the oil pressure monitoring device (14) and the oil level monitoring device (15) are respectively connected to the simulation modeling server (18) through the steam turbine regulation and safety system DCS cabinet (16) via the PXI data acquisition cabinet (17); the oil temperature monitoring device (13), the oil pressure monitoring device (14) and the oil level monitoring device (15) transmit the monitored information to the simulation modeling server (18); the simulation modeling server (18) transmits the information to the steam turbine regulation and safety system DCS cabinet (16) through the PXI data acquisition cabinet (17); the steam turbine regulation and safety system DCS cabinet (16) is used to control the start and stop of each component; The control oil tank (1) is provided with an oil temperature monitoring device (13), an oil pressure monitoring device (14) and an oil level monitoring device (15). The oil temperature monitoring device (13) is used to monitor the oil temperature in the control oil tank (1), the oil pressure monitoring device (14) is used to monitor the oil pressure in the control oil tank (1), and the oil level monitoring device (15) is used to monitor the oil level in the control oil tank (1). The steam turbine inlet valve group (12) is composed of a steam turbine main steam valve and a regulating valve. The steam turbine regulating and safety system DCS cabinet (16) comprises a DCS cabinet body and a cooling oil pump drive card (16-1), an electric heater inlet valve drive card (16-2), an electric heater drive card (16-3), an electric heater outlet valve drive card (16-4), an oil cooler outlet valve drive card (16-5), an oil cooler drive card (16-6), an oil cooler inlet valve drive card (16-7), an oil temperature monitoring device measuring card (16-8), an oil pressure monitoring device measuring card (16-9), an oil level monitoring device measuring card (16-10), a first control oil pump drive card (16-11), an emergency trip device drive card (16-12), a turbine steam inlet valve group drive card (16-13) and a second control oil pump drive card (16-14) arranged in the DCS cabinet body; Among them, the cooling oil pump drive card (16-1) is connected to the cooling oil pump (2), the electric heater inlet valve drive card (16-2) is connected to the electric heater inlet valve (3), the electric heater drive card (16-3) is connected to the electric heater (4), the electric heater outlet valve drive card (16-4) is connected to the electric heater outlet valve (5), the oil cooler inlet valve drive card (16-7) is connected to the oil cooler inlet valve (6), the oil cooler drive card (16-6) is connected to the oil cooler (7), the oil cooler outlet valve drive card (16-5) is connected to the oil cooler outlet valve (8), and the oil temperature monitoring device measuring card (16-8) is connected to the oil temperature monitoring device (13), the oil pressure monitoring device measuring card (16-9) is connected to the oil pressure monitoring device (14), the oil level monitoring device measuring card (16-10) is connected to the oil level monitoring device (15), the first control oil pump drive card (16-11) is connected to the first control oil pump (9), the emergency shut-off device drive card (16-12) is connected to the emergency shut-off device (11), the second control oil pump drive card (16-14) is connected to the second control oil pump (10), and the turbine steam inlet valve group drive card (16-13) is connected to the turbine steam inlet valve group (12).

2. A test device for verifying the function of a nuclear power plant steam turbine regulation and safety system according to claim 1, characterized in that: The PXI data acquisition cabinet (17) comprises a data acquisition cabinet body and a cooling oil pump drive A / D conversion card (17-1) arranged in the data acquisition cabinet body, an electric heater inlet valve A / D conversion card (17-2), an electric heater A / D conversion card (17-3), an electric heater outlet valve A / D conversion card (17-4), an oil cooler outlet valve A / D conversion card (17-5), an oil cooler A / D conversion card (17-6), an oil cooler inlet valve A / D conversion card (17-7), and an oil cooler outlet valve A / D conversion card (17-8). / D conversion card (17-7), oil temperature monitoring device measuring A / D conversion card (17-8), oil pressure monitoring device measuring A / D conversion card (17-9), oil level monitoring device measuring A / D conversion card (17-10), first control oil pump A / D conversion card (17-11), emergency trip device A / D conversion card (17-12), turbine inlet valve group A / D conversion card (17-13) and second control oil pump A / D conversion card (17-14); The simulation modeling server (18) comprises a cooling oil pump simulation module (18-1), an electric heater inlet valve simulation module (18-2), an electric heater simulation module (18-3), an electric heater outlet valve simulation module (18-4), an oil cooler outlet valve simulation module (18-5), an oil cooler simulation module (18-6), an oil cooler inlet valve simulation module (18-7), an oil temperature monitoring device measurement simulation module (18-8), an oil pressure monitoring device measurement simulation module (18-9), an oil level monitoring device measurement simulation module (18-10), a first control oil pump simulation module (18-11), an emergency shutoff device simulation module (18-12), a turbine steam inlet valve group simulation module (18-13) and a second control oil pump simulation module (18-14); The cooling oil pump simulation module (18-1) is connected to the cooling oil pump drive card (16-1) via the cooling oil pump drive A / D conversion card (17-1); the electric heater inlet valve simulation module (18-2) is connected to the electric heater inlet valve drive card (16-2) via the electric heater inlet valve A / D conversion card (17-2); the electric heater simulation module (18-3) is connected to the electric heater drive card (16-3) via the electric heater A / D conversion card (17-3); the electric heater outlet valve simulation module (18-4) is connected to the electric heater outlet valve A / D conversion card (17-4 ) is connected to the electric heater outlet valve drive card (16-4); the oil cooler outlet valve simulation module (18-5) is connected to the oil cooler outlet valve drive card (16-5) via the oil cooler outlet valve A / D conversion card (17-5); the oil cooler simulation module (18-6) is connected to the oil cooler drive card (16-6) via the oil cooler A / D conversion card (17-6); the oil cooler inlet valve simulation module (18-7) is connected to the oil cooler inlet valve drive card (16-7) via the oil cooler inlet valve A / D conversion card (17-7); the oil temperature monitoring device measurement simulation module (18-8) is connected to the oil cooler inlet valve drive card (16-7) via the oil cooler The temperature monitoring device measuring A / D conversion card (17-8) is connected to the oil temperature monitoring device measuring card (16-8); the oil pressure monitoring device measuring simulation module (18-9) is connected to the oil pressure monitoring device measuring card (16-9) via the oil pressure monitoring device measuring A / D conversion card (17-9); the oil level monitoring device measuring simulation module (18-10) is connected to the oil level monitoring device measuring card (16-10) via the oil level monitoring device measuring A / D conversion card (17-10); the first control oil pump simulation module (18-11) is connected to the oil level monitoring device measuring card (16-10) via the first control oil pump A / D conversion card (17-11) The emergency shutoff device simulation module (18-12) is connected to the emergency shutoff device driving card component (16-12) via the emergency shutoff device A / D conversion card component (17-12); the steam turbine steam inlet valve group simulation module (18-13) is connected to the steam turbine steam inlet valve group driving card component (16-13) via the steam turbine steam inlet valve group A / D conversion card component (17-13); and the second control oil pump simulation module (18-14) is connected to the second control oil pump driving card component (16-14) via the second control oil pump A / D conversion card component (17-14).

3. A method for using a test device for verifying the function of a nuclear power plant steam turbine regulation and safety system according to any one of claims 1 or 2, characterized in that: The steps include: 1) Logic verification of the cooling oil pump (2) and the electric heater (4) in operation: 2) Logic verification of the operation of the cooling oil pump (2) and the oil cooler (7): 3) Control oil pump start, switch, stop logic verification: 4) Testing of emergency trip device (11) and steam turbine inlet valve group (12): During the above test process, the controller parameters in the simulation modeling server (18) are repeatedly adjusted until the response time of each component meets the design function and the operating characteristics meet the design function.

4. The method for using the test device for verifying the function of a nuclear power plant steam turbine regulation and safety system according to claim 3, characterized in that: The specific operation steps of the operation logic verification of the cooling oil pump (2) and the electric heater (4) are as follows: the oil temperature in the control oil tank (1) is set to be lower than the normal operating temperature in the oil temperature monitoring device measurement simulation module (18-8), and the output low oil temperature trigger signal is transmitted to the oil temperature monitoring device measurement card (16-8) through the oil temperature monitoring device measurement A / D conversion card (17-8), and then transmitted to the oil temperature monitoring device (13), and the oil temperature monitoring device (13) signal is transmitted to the turbine regulation and safety system DCS cabinet (16-8). ), the cooling oil pump driving card (16-1) drives the cooling oil pump (2) to start, and at the same time, the electric heater inlet valve driving card (16-2) drives the electric heater inlet valve (3) to open quickly, the electric heater driving card (16-3) drives the electric heater (4) to start operation, and the electric heater outlet valve driving card (16-4) drives the electric heater outlet valve (5) to open quickly, and the cooling oil pump (2) provides driving power for the control oil in the control oil tank (1), and cyclic heating is carried out until the oil temperature in the control oil tank (1) is normal.

5. The method for using the test device for verifying the function of a nuclear power plant steam turbine regulation and safety system according to claim 4, characterized in that: The specific operation steps of the operation logic verification of the cooling oil pump (2) and the oil cooler (7) are as follows: The oil temperature in the control oil tank 1 is set higher than the normal operating temperature in the oil temperature monitoring device measurement simulation module (18-8), and the output oil temperature high trigger signal is transmitted to the oil temperature monitoring device measurement card (16-8) through the oil temperature monitoring device measurement A / D conversion card (17-8), and then transmitted to the oil temperature monitoring device (13). The oil temperature monitoring device (13) transmits the signal to the turbine regulation and safety system DCS cabinet (16), and the cooling oil pump drive card (16-1) drives the cooling oil pump (2) to start, and the cooler inlet valve drive card (16-7) drives the cooler inlet valve (6) to open quickly, the cooler drive card (16-6) drives the cooler (7) to start operation, and the cooler outlet valve drive card (16-5) drives the cooler outlet valve (8) to open quickly. The cooling oil pump (2) provides driving power for the control oil in the control oil tank (1), and circulates cooling until the oil temperature in the control oil tank (1) is normal.

6. The method for using the test device for verifying the function of a nuclear power plant steam turbine regulation and safety system according to claim 4, characterized in that: The specific operation steps of the control oil pump start, switch, stop logic verification are as follows: Start-up permission conditions: the oil temperature monitoring device (13) in the control oil tank (1) indicates that the oil temperature is normal, and the oil level monitoring device (15) indicates that the oil level is normal; The simulation modeling server (18) triggers an oil pump start signal, which is transmitted by the first control oil pump simulation module (18-11) to the first control oil pump drive card component (16-11) through the first control oil pump A / D conversion card component (17-11) and drives the first control oil pump (9) to start; and the start response characteristic curve of the first control oil pump (9) is tested; The oil pressure in the control oil tank (1) is set to be lower than the normal operating oil pressure in the oil pressure monitoring device measurement simulation module (18-9), and the output low oil pressure trigger signal is transmitted to the oil pressure monitoring device measurement card (16-9) through the oil pressure monitoring device measurement A / D conversion card (17-9), and then transmitted to the oil pressure monitoring device (14). The oil pressure monitoring device (14) signal is transmitted to the turbine regulation and safety system DCS cabinet (16), and the second control oil pump drive card (16-14) drives the second control oil pump (10) to start until the control oil pressure is normal, and the start-up response characteristic curve of the second control oil pump (10) is tested; The oil level in the control oil tank (1) is set to be lower than the normal operating oil level in the oil level monitoring device measurement simulation module (18-10), and the output low oil level trigger signal is transmitted to the oil level monitoring device measurement card (16-10) through the oil level monitoring device measurement A / D conversion card (17-10), and then transmitted to the oil level monitoring device (15). The oil level monitoring device (15) transmits the signal to the turbine regulation and safety system DCS cabinet (16), and the first control oil pump driving card (16-11) drives the first control oil pump (9) to stop; the second control oil pump driving card (16-14) drives the second control oil pump (10) to stop, and the stop characteristic curves of the first control oil pump 9 and the second control oil pump (10) are tested.

7. The method for using the test device for verifying the function of a nuclear power plant steam turbine regulation and safety system according to claim 4, characterized in that: The specific operation steps of testing the emergency trip device (11) and the steam turbine steam inlet valve group (12) are as follows: Initial conditions: the first control oil pump (9) or the second control oil pump (10) operates normally, and the oil temperature monitoring device (13), the oil pressure monitoring device (14) and the oil level monitoring device (15) display normal; The simulation modeling server (18) triggers a steam turbine start signal, which is transmitted by the emergency shutoff device simulation module (18-12) to the emergency shutoff device drive card (16-12) through the emergency shutoff device A / D conversion card (17-12) and drives the emergency shutoff device (11) to conduct control oil to the oil circuit of the steam turbine steam inlet valve group (12), and the oil pressure is established. The steam turbine steam inlet valve group drive card (16-13) drives the main steam valve in the steam turbine steam inlet valve group (12) to open quickly, and the opening time of the main steam valve in the steam turbine steam inlet valve group (12) is tested; The simulation modeling server (18) triggers a turbine stop signal, which is transmitted by the emergency shut-off device simulation module (18-12) to the emergency shut-off device drive card (16-12) through the emergency shut-off device A / D conversion card (17-12) and drives the emergency shut-off device (11) to shut off the oil path of the control oil to the turbine steam inlet valve group (12), and the control oil flows back to the control oil tank (1); the main steam valve and the regulating valve in the turbine steam inlet valve group (12) are driven by the turbine steam inlet valve group drive card (16-13) to close quickly, and test whether the closing time of the main steam valve and the regulating valve in the turbine steam inlet valve group (12) meets the design specifications.

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