Testing device for function verification of once-through steam generator fault protection system

Abstract

The utility model discloses a testing device and method for function verification of a once-through steam generator fault protection system, a secondary side of a steam generator is divided into a steam generator evaporation section and a steam generator overheating section, an outlet of a water supply system is divided into two paths, wherein one path is communicated with an inlet of an evaporation section of the steam generator through a first valve group, the other path is communicated with an inlet of the steam-water separator, an outlet of the evaporation section of the steam generator is divided into two paths, one path is communicated with an inlet of an overheating section of the steam generator through a third valve group, and the other path is communicated with an inlet of the steam-water separator through a fourth valve group. A gas outlet of the steam-water separator is divided into two paths, one path is communicated with an inlet of the superheat section of the steam generator through a fifth valve group, the other path is communicated with an outlet of the superheat section of the steam generator, and the device and the method can verify the function of the steam generator fault protection system.

Description

Technical Field

[0001] The utility model belongs to the field of nuclear energy science and engineering, and relates to a test device for verifying the function of a fault protection system of a once-through steam generator. Background Art

[0002] Once-through steam generators are widely used in new first-generation nuclear reactors due to their high thermal efficiency and low energy loss. The heat exchange unit of a once-through steam generator is mainly composed of an evaporation section and a superheating section. At present, the conventional operating scheme is: when a failure occurs in the evaporation section or superheating section of a once-through steam generator, the reactor is immediately triggered to shut down urgently, and the turbine and generator stop operating. This research team has proposed a new operating mode for the first time, that is, when a failure occurs in the evaporation section of a once-through steam generator, there is no need to trigger an emergency shutdown of the reactor. The fault protection system allows the reactor and steam turbine generator set to operate safely at low load.

[0003] To ensure the operational safety of once-through steam generators, it is crucial to conduct early functional verification of their fault protection systems. However, during normal unit operation, the fault protection system is not readily available for verification, making it difficult to identify and correct control strategy issues in advance. Therefore, it is necessary to develop a test device for functional verification of once-through steam generator fault protection systems. Utility Model Content

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a test device and method for verifying the function of a once-through steam generator fault protection system. The device and method can verify the function of the steam generator fault protection system.

[0005] To achieve the above-mentioned object, the utility model discloses a test device for verifying the function of a fault protection system of a once-through steam generator, comprising a steam generator, a steam-water separator, a water supply system, a first valve group, a third valve group, a fourth valve group and a fifth valve group;

[0006] The secondary side of the steam generator is divided into a steam generator evaporation section and a steam generator superheating section. The outlet of the water supply system is divided into two routes, one of which is connected to the inlet of the steam generator evaporation section through the first valve group, and the other is connected to the inlet of the steam-water separator. The outlet of the steam generator evaporation section is divided into two routes, one of which is connected to the inlet of the steam generator superheating section through the third valve group, and the other is connected to the inlet of the steam-water separator through the fourth valve group. The gas outlet of the steam-water separator is divided into two routes, one of which is connected to the inlet of the steam generator superheating section through the fifth valve group, and the other is connected to the outlet of the steam generator superheating section.

[0007] The steam generator fault monitoring device is connected to the steam generator, and the simulation modeling server is connected to the steam generator fault monitoring device, the first valve group, the third valve group, the fourth valve group and the fifth valve group.

[0008] Furthermore, it also includes a steam turbine and a condenser, and the outlet of the superheating section of the steam generator is connected to the inlet of the steam turbine, the inlet of the condenser and the inlet of the steam-water separator.

[0009] Furthermore, it also includes a reactor, which is connected to the primary side of the steam generator.

[0010] Furthermore, it also includes a human-machine interface display, which is connected to the simulation modeling server.

[0011] Furthermore, the PXI data acquisition cabinet and the steam generator safety system DCS cabinet, the simulation modeling server are connected to the steam generator fault monitoring device, the first valve group, the third valve group, the fourth valve group and the fifth valve group via the PXI data acquisition cabinet and the steam generator safety system DCS cabinet.

[0012] Furthermore, the steam generator safety system DCS cabinet includes a DCS cabinet body and a fifth valve group drive card, a third valve group drive card, a fourth valve group drive card, a first valve group drive card, and a steam generator fault monitoring card arranged in the DCS cabinet body, wherein the PXI data acquisition cabinet is connected to the fifth valve group via the fifth valve group drive card, the Labview data acquisition cabinet is connected to the third valve group via the third valve group drive card; the Labview data acquisition cabinet is connected to the fourth valve group via the fourth valve group drive card; the Labview data acquisition cabinet is connected to the first valve group via the first valve group drive card; and the Labview data acquisition cabinet is connected to the steam generator fault monitoring device via the steam generator fault monitoring card.

[0013] Furthermore, the Labview data acquisition cabinet includes a data acquisition cabinet body and a fifth valve group A / D conversion card, a third valve group A / D conversion card, a fourth valve group A / D conversion card, a first valve group A / D conversion card, and a steam generator fault monitoring device A / D conversion card arranged in the data acquisition cabinet body;

[0014] The simulation modeling server includes a simulation modeling server body and a fifth valve group simulation model system, a third valve group simulation model system, a fourth valve group simulation model system, a first valve group simulation model system, and a steam generator fault monitoring simulation model system arranged in the simulation modeling server body;

[0015] The fifth valve group simulation model system is connected to the fifth valve group drive card via the fifth valve group A / D conversion card; the third valve group simulation model system is connected to the third valve group drive card via the third valve group A / D conversion card; the fourth valve group simulation model system is connected to the fourth valve group drive card via the fourth valve group A / D conversion card; the first valve group simulation model system is connected to the first valve group drive card via the first valve group A / D conversion card; the steam generator fault monitoring simulation model system is connected to the steam generator fault monitoring card via the steam generator fault monitoring device A / D conversion card.

[0016] Furthermore, the steam turbine is connected to a generator.

[0017] The utility model has the following beneficial effects:

[0018] The test device for verifying the function of a direct current steam generator fault protection system described in the utility model controls the triggering state of the "fault" signal in the steam generator fault monitoring device and the switching state of the valve group of the evaporation section of the steam generator during specific operation, thereby performing a logic preview and dynamic test on the direct current steam generator fault protection system during the commissioning and startup of the unit, thereby realizing early verification of the actual function of the direct current steam generator fault protection system, exposing and correcting problems existing in the logical configuration of the direct current steam generator fault protection system in advance, and greatly improving the reliability of the direct current steam generator fault protection system during the operation of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present invention are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] 1 is the reactor, 2 is the steam generator, 2-1 is the evaporation section of the steam generator, 2-2 is the superheating section of the steam generator, 3 is the steam-water separator, 4 is the steam turbine, 5 is the generator, 6 is the condenser, 7 is the steam generator fault monitoring device, 8 is the human-machine interface display, 9 is the water supply system, 10 is the first valve group, 11 is the second valve group, 12 is the third valve group, 13 is the fourth valve group, 14 is the fifth valve group, 20 is the steam generator safety system DCS cabinet, 20-1 is the fifth valve group drive card, 20-2 is the third valve group drive card, 20-3 is the fourth valve group drive card, 20-4 is the first valve group drive card, 2 0-5 is the steam generator fault monitoring card, 21 is the PXI data acquisition cabinet, 21-1 is the fifth valve group A / D conversion card, 21-2 is the third valve group A / D conversion card, 21-3 is the fourth valve group A / D conversion card, 21-4 is the first valve group A / D conversion card, 21-5 is the steam generator fault monitoring device A / D conversion card, 22 is the simulation modeling server, 22-1 is the fifth valve group simulation model system, 22-2 is the third valve group simulation model system, 22-3 is the fourth valve group simulation model system, 22-4 is the first valve group simulation model system, and 22-5 is the steam generator fault monitoring simulation model system. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "include" and "comprise" indicate the existence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections.

[0024] It should also be understood that the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0025] It should be further understood that the term "and / or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items. For example, A and / or B may represent: A alone, A and B simultaneously, or B alone. In addition, the character " / " in this specification generally indicates that the associated items are in an "or" relationship.

[0026] It should be understood that although the terms "first," "second," and "third" may be used in embodiments of the present invention to describe preset ranges, the preset ranges should not be limited to these terms. These terms are merely used to distinguish one preset range from another. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0027] The word "if," as used herein, may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents selected embodiments of the present invention. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments disclosed herein. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes, relative sizes, and positional relationships of the various regions and layers shown in the figures are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0030] refer to Figure 1 The test device for verifying the function of the fault protection system of a direct current steam generator according to the present invention comprises a steam generator 2, a steam-water separator 3, a water supply system 9, a first valve group 10, a third valve group 12, a fourth valve group 13 and a fifth valve group 14; the secondary side of the steam generator 2 is divided into a steam generator evaporation section 2-1 and a steam generator superheating section 2-2, wherein the outlet of the water supply system 9 is divided into two paths, one of which is connected to the inlet of the steam generator evaporation section 2-1 through the first valve group 10, and the other is connected to the inlet of the steam-water separator 3; the outlet of the steam generator evaporation section 2-1 is divided into two paths, one of which is connected to the inlet of the steam generator evaporation section 2-1 through the first valve group 10, and the other is connected to the inlet of the steam-water separator 3; It is connected to the inlet of the steam generator superheating section 2-2 through the third valve group 12, and the other is connected to the inlet of the steam-water separator 3 through the fourth valve group 13. The gas outlet of the steam-water separator 3 is divided into two paths, one of which is connected to the inlet of the steam generator superheating section 2-2 through the fifth valve group 14, and the other is connected to the outlet of the steam generator superheating section 2-2. The steam turbine 4 is connected to the generator 5; the steam generator fault monitoring device 7 is connected to the steam generator 2, and the simulation modeling server 22 is connected to the steam generator fault monitoring device 7, the first valve group 10, the third valve group 12, the fourth valve group 13 and the fifth valve group 14.

[0031] As an embodiment of the present invention, it further includes a steam turbine 4 and a condenser 6 , and the outlet of the steam generator superheating section 2 - 2 is connected to the inlet of the steam turbine 4 , the inlet of the condenser 6 and the inlet of the steam-water separator 3 .

[0032] As an embodiment of the present invention, a reactor 1 is further included. The reactor 1 is connected to the primary side of the steam generator 2 .

[0033] As an implementation mode of the present invention, it further includes a human-machine interface display 8 , which is connected to the simulation modeling server 22 .

[0034] As an embodiment of the present utility model, the PXI data acquisition cabinet 21 and the steam generator safety system DCS cabinet 20, the simulation modeling server 22 are connected to the steam generator fault monitoring device 7, the first valve group 10, the third valve group 12, the fourth valve group 13 and the fifth valve group 14 through the PXI data acquisition cabinet 21 and the steam generator safety system DCS cabinet 20.

[0035] As an embodiment of the present utility model, the steam generator safety system DCS cabinet 20 includes a DCS cabinet body and a fifth valve group drive card 20-1, a third valve group drive card 20-2, a fourth valve group drive card 20-3, a first valve group drive card 20-4, and a steam generator fault monitoring card 20-5 arranged in the DCS cabinet body, wherein the PXI data acquisition cabinet 21 is connected to the fifth valve group 14 via the fifth valve group drive card 20-1, the Labview data acquisition cabinet 21 is connected to the third valve group 12 via the third valve group drive card 20-2; the Labview data acquisition cabinet 21 is connected to the fourth valve group 13 via the fourth valve group drive card 20-3; the Labview data acquisition cabinet 21 is connected to the first valve group 10 via the first valve group drive card 20-4; the Labview data acquisition cabinet 21 is connected to the steam generator fault monitoring device 7 via the steam generator fault monitoring card 20-5.

[0036] As an embodiment of the present invention, the Labview data acquisition cabinet 21 includes a data acquisition cabinet body and a fifth valve group A / D conversion card 21-1, a third valve group A / D conversion card 21-2, a fourth valve group A / D conversion card 21-3, a first valve group A / D conversion card 21-4, and a steam generator fault monitoring device A / D conversion card 21-5 arranged in the data acquisition cabinet body; the simulation modeling server 22 includes a simulation modeling server body and a fifth valve group simulation model system 22-1, a third valve group simulation model system 22-2, a fourth valve group simulation model system 22-3, a first valve group simulation model system 22-4, a steam generator fault monitoring simulation model arranged in the simulation modeling server body. System 22-5; the fifth valve group simulation model system 22-1 is connected to the fifth valve group drive card 20-1 via the fifth valve group A / D conversion card 21-1; the third valve group simulation model system 22-2 is connected to the third valve group drive card 20-2 via the third valve group A / D conversion card 21-2; the fourth valve group simulation model system 22-3 is connected to the fourth valve group drive card 20-3 via the fourth valve group A / D conversion card 21-3; the first valve group simulation model system 22-4 is connected to the first valve group drive card 20-4 via the first valve group A / D conversion card 21-4; the steam generator fault monitoring simulation model system 22-5 is connected to the steam generator fault monitoring card 20-5 via the steam generator fault monitoring device A / D conversion card 21-5.

[0037] The specific working process of the safety system function verification described in this utility model is as follows:

[0038] The evaporation section 2-1 of the steam generator fails and the superheating section 2-2 of the steam generator operates normally:

[0039] Initial state: the reactor 1 is running at full load, the steam turbine 4 and the generator 5 are running at full load, the condensate pump 8 and the feed water pump 9 are running, the first valve group 10 and the third valve group 12 are open, and the second valve group 11, the fourth valve group 13, and the fifth valve group 14 are closed.

[0040] In the simulation modeling server 22, a fault in the evaporation section 2-1 of the steam generator is simulated, and the steam generator fault monitoring device 7 is activated, triggering the action of the safety system of the steam generator 2. The specific process is as follows:

[0041] 1) The trigger signal output by the simulation modeling server 22 is transmitted to the steam generator fault monitoring device 7 through the steam generator fault monitoring device A / D conversion card 21-5 and the steam generator fault monitoring card 20-5. According to the detection signal of the steam generator fault monitoring device 7, it is judged as "steam generator evaporation section 2-1 fault", and the signal is output as an alarm signal on the human-machine interface display 8.

[0042] 2) The reactor 1 and the generator 5 are powered down, and the second valve group 11 is opened.

[0043] 3) The fifth valve group 14 is driven to open by the fifth valve group drive card 20-1, the third valve group 12 is driven to close by the third valve group drive card 21-2, the fourth valve group 13 is driven to close by the fourth valve group drive card 21-3, and the first valve group 10 is driven to close by the first valve group drive card 21-4, and the steam generator evaporation section 2-1 is isolated.

[0044] The action signal fed back by the fifth valve group 14 is sequentially input into the fifth valve group simulation model system 22-1 via the fifth valve group drive card 20-1 and the fifth valve group drive A / D conversion card 21-1, and then displayed and outputted via the human-machine interface display 8. The opening time of the fifth valve group 14 is read via the human-machine interface display 8. The action signal fed back by the third valve group 12 is sequentially input into the third valve group simulation model system 22-2 via the third valve group drive card 20-2 and the third valve group drive A / D conversion card 21-2, and then displayed and outputted via the human-machine interface display 8. The closing response time of the third valve group 12 is read via the human-machine interface display 8. The action signal fed back by the fourth valve group is sequentially input into the fourth valve group simulation model system 22-3 through the fourth valve group drive card 20-3 and the fourth valve group drive A / D conversion card 21-3, and then displayed and outputted through the human-machine interface display 8, and the closing response time of the fourth valve group 13 is read through the human-machine interface display 8; the action signal fed back by the first valve group 10 is sequentially input into the first valve group simulation model system 22-4 through the first valve group drive card 20-4 and the first valve group drive A / D conversion card 21-4, and then displayed and outputted through the human-machine interface display 8, and the closing response time of the first valve group 10 is read through the human-machine interface display 8.

[0045] 4) The superheated steam output from the steam generator superheating section 2-2 is divided into two parts. One part of the superheated steam enters the steam turbine 4 to perform work, thereby driving the generator 5 to operate at low load. The other part of the superheated steam enters the steam-water separator 3 to exchange heat with the feed water delivered to the steam-water separator 3 by the feed water system 9. The saturated steam output from the steam-water separator 3 enters the steam generator superheating section 2-2 through the fifth valve group 14, absorbs the heat transferred from the reactor 1 to the steam generator 2, and is converted into superheated steam. The steam is then supplied to the steam turbine 4 to perform work, thereby forming a steam circulation loop. The drain steam output from the steam-water separator 3 enters the condenser 6, and the exhaust steam from the steam turbine 4 enters the condenser 6 to condense into condensed water, which is supplied to the unit feed water system 9.

[0046] 5) During the low-load operation phase of the reactor 1, steam turbine 4, and generator 5, the amount of steam entering the steam turbine 4 is controlled so that the amount of steam entering the steam turbine 4 matches the amount of steam heated in the steam-water separator 3, thereby ensuring the safety and stability of the low-load operation of the unit.

[0047] By adjusting the parameters of the fifth valve group simulation model system 22-1, the third valve group simulation model system 22-2, the fourth valve group simulation model system 22-3, and the first valve group simulation model system 22-4 until the qualification standards are met, wherein the qualification standards are: the opening time of the fifth valve group 14 ≤3s, and the closing response time of the first valve group 10, the third valve group 12 and the fourth valve group 13 ≤1s.

[0048] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and disclosure of the utility model. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary; the true scope and spirit of the present invention are indicated by the following claims.

[0049] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0050] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A test device for verifying the function of a once-through steam generator fault protection system, characterized in that: It comprises a steam generator (2), a steam-water separator (3), a water supply system (9), a first valve group (10), a third valve group (12), a fourth valve group (13) and a fifth valve group (14); The secondary side of the steam generator (2) is divided into a steam generator evaporation section (2-1) and a steam generator superheating section (2-2), wherein the outlet of the water supply system (9) is divided into two paths, one of which is connected to the inlet of the steam generator evaporation section (2-1) through the first valve group (10), and the other is connected to the inlet of the steam-water separator (3). The outlet of the steam generator evaporation section (2-1) is divided into two paths, one of which is connected to the inlet of the steam generator superheating section (2-2) through the third valve group (12), and the other is connected to the inlet of the steam-water separator (3) through the fourth valve group (13). The gas outlet of the steam-water separator (3) is divided into two paths, one of which is connected to the inlet of the steam generator superheating section (2-2) through the fifth valve group (14), and the other is connected to the outlet of the steam generator superheating section (2-2). The steam generator fault monitoring device (7) is connected to the steam generator (2), and the simulation modeling server (22) is connected to the steam generator fault monitoring device (7), the first valve group (10), the third valve group (12), the fourth valve group (13) and the fifth valve group (14).

2. The test device for functional verification of a once-through steam generator fault protection system according to claim 1, characterized in that: It also includes a steam turbine (4) and a condenser (6), and the outlet of the steam generator superheating section (2-2) is connected to the inlet of the steam turbine (4), the inlet of the condenser (6) and the inlet of the steam-water separator (3).

3. The test device for functional verification of a once-through steam generator fault protection system according to claim 1, characterized in that: It also includes a reactor (1), which is connected to the primary side of the steam generator (2).

4. The test device for functional verification of a once-through steam generator fault protection system according to claim 1, characterized in that: It also includes a human-machine interface display (8), which is connected to the simulation modeling server (22).

5. The test device for functional verification of a once-through steam generator fault protection system according to claim 4, characterized in that: A PXI data acquisition cabinet (21) and a steam generator safety system DCS cabinet (20), and a simulation modeling server (22) are connected to a steam generator fault monitoring device (7), a first valve group (10), a third valve group (12), a fourth valve group (13), and a fifth valve group (14) via the PXI data acquisition cabinet (21) and the steam generator safety system DCS cabinet (20).

6. The test device for functional verification of a once-through steam generator fault protection system according to claim 5, characterized in that: The steam generator safety system DCS cabinet (20) comprises a DCS cabinet body and a fifth valve group drive card (20-1), a third valve group drive card (20-2), a fourth valve group drive card (20-3), a first valve group drive card (20-4), and a steam generator fault monitoring card (20-5) arranged in the DCS cabinet body, wherein a PXI data acquisition cabinet (21) is connected to the fifth valve group (14) via the fifth valve group drive card (20-1), and a Labview data acquisition machine The cabinet (21) is connected to the third valve group (12) via the third valve group drive card (20-2); the Labview data acquisition cabinet (21) is connected to the fourth valve group (13) via the fourth valve group drive card (20-3); the Labview data acquisition cabinet (21) is connected to the first valve group (10) via the first valve group drive card (20-4); and the Labview data acquisition cabinet (21) is connected to the steam generator fault monitoring device (7) via the steam generator fault monitoring card (20-5).

7. The test device for functional verification of a once-through steam generator fault protection system according to claim 6, characterized in that: The Labview data acquisition cabinet (21) comprises a data acquisition cabinet body, and a fifth valve group A / D conversion card (21-1), a third valve group A / D conversion card (21-2), a fourth valve group A / D conversion card (21-3), a first valve group A / D conversion card (21-4), and a steam generator fault monitoring device A / D conversion card (21-5) arranged in the data acquisition cabinet body; The simulation modeling server (22) includes a simulation modeling server body and a fifth valve group simulation model system (22-1), a third valve group simulation model system (22-2), a fourth valve group simulation model system (22-3), a first valve group simulation model system (22-4), and a steam generator fault monitoring simulation model system (22-5) arranged in the simulation modeling server body; The fifth valve group simulation model system (22-1) is connected to the fifth valve group drive card (20-1) via the fifth valve group A / D conversion card (21-1); the third valve group simulation model system (22-2) is connected to the third valve group drive card (20-2) via the third valve group A / D conversion card (21-2); the fourth valve group simulation model system (22-3) is connected to the fourth valve group drive card (20-3) via the fourth valve group A / D conversion card (21-3); the first valve group simulation model system (22-4) is connected to the first valve group drive card (20-4) via the first valve group A / D conversion card (21-4); and the steam generator fault monitoring simulation model system (22-5) is connected to the steam generator fault monitoring card (20-5) via the steam generator fault monitoring device A / D conversion card (21-5).

8. The test device for functional verification of a once-through steam generator fault protection system according to claim 1, characterized in that: The steam turbine (4) is connected to a generator (5).

9. The test device for functional verification of a once-through steam generator fault protection system according to claim 1, characterized in that: It also includes a reactor (1), a steam turbine (4) and a condenser (6); the outlet of the steam generator superheating section (2-2) is connected to the inlet of the steam turbine (4), the inlet of the condenser (6) and the inlet of the steam-water separator (3); and the reactor (1) is connected to the primary side of the steam generator (2).

10. The testing device for functional verification of a once-through steam generator fault protection system according to claim 1, characterized in that: It also includes a reactor (1) and a human-machine interface display (8), wherein the reactor (1) is connected to the primary side of the steam generator (2); The human-machine interface display (8) is connected to the simulation modeling server (22).

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