Testing device and method for once-through steam generator fault protection system

Abstract

The invention discloses a testing device and method for a once-through steam generator fault protection system. An outlet of an overheating section of a steam generator is communicated with an inlet of a steam turbine, an inlet of a condenser and an inlet of a steam-water separator; an outlet of the water supply system is divided into two paths, 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, and one path is communicated with an inlet of an overheating section of the steam generator through a third 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 sixth valve group, and the other path is communicated with an outlet of the superheat section of the steam generator; according to the device and the method, the function of the steam generator fault protection system can be verified.

Description

Technical Field

[0001] The invention belongs to the field of nuclear energy science and engineering, and relates to a testing device and method for a fault protection system of a direct current steam generator. Background Art

[0002] Direct-current steam generators are widely used in new first-generation nuclear reactors due to their advantages of high thermal efficiency and low energy loss. The heat exchange unit of a direct-current steam generator is mainly composed of an evaporation section and a superheating section. At present, the conventional operation scheme is: when a fault occurs in the evaporation section or superheating section of a direct-current steam generator, the reactor emergency shutdown is immediately triggered, and the turbine and generator stop operating. This research team proposed a new operating mode for the first time, that is, when a fault occurs in the evaporation section of a direct-current 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] In order to ensure the safety of the operation of the once-through steam generator, it is very important to verify the function of the once-through steam generator fault protection system in advance. However, during the normal operation of the unit, the fault protection system does not have the conditions for actual verification, and it is difficult to expose and correct the problems of the control strategy in advance. Therefore, it is necessary to develop a test device for the functional verification of the once-through steam generator fault protection system. Summary of the invention

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

[0005] To achieve the above object, the present invention discloses a testing device for a fault protection system of a once-through steam generator, comprising a steam generator, a steam turbine, a condenser, a steam-water separator, a water supply system, a first valve group, a third valve group, a fourth valve group and a sixth valve group;

[0006] The secondary side of the steam generator is divided into a steam generator evaporation section and a steam generator superheating section, wherein the outlet of the steam generator superheating section is connected to the inlet of the steam turbine, the inlet of the condenser and the inlet of the steam-water separator; 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 sixth 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 sixth valve group.

[0008] Furthermore, the reactor is connected to the primary side of the steam generator.

[0009] Furthermore, it also includes a human-machine interface display, a PXI data acquisition cabinet and a steam generator safety system DCS cabinet. The human-machine interface display is connected to the steam generator fault monitoring device, the first valve group, the third valve group, the fourth valve group and the sixth valve group via the simulation modeling server, the PXI data acquisition cabinet and the steam generator safety system DCS cabinet.

[0010] Furthermore, the outlet of the superheating section of the steam generator is divided into two paths, one of which is connected to the inlet of the steam turbine through the seventh valve group, and the other is connected to the inlet of the eighth valve group. The outlet of the eighth valve group is divided into two paths, one of which is connected to the inlet of the condenser through the ninth valve group, and the other is connected to the inlet of the steam-water separator through the tenth valve group. The outlet of the steam turbine is connected to the inlet of the condenser, and the liquid outlet of the steam-water separator is connected to the inlet of the condenser.

[0011] Furthermore, the outlet of the water supply system is connected to the inlet of the steam-water separator via the second valve group.

[0012] Furthermore, the gas outlet of the steam-water separator is connected to the outlet of the superheating section of the steam generator through the fifth valve group.

[0013] Furthermore, the steam generator safety system DCS cabinet includes a DCS cabinet body and a sixth 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 sixth valve group via the sixth 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; the Labview data acquisition cabinet is connected to the steam generator fault monitoring device via the steam generator fault monitoring card.

[0014] Further, the Labview data acquisition cabinet includes a data acquisition cabinet body and a sixth 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;

[0015] The simulation modeling server includes a simulation modeling server body and a sixth 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;

[0016] The sixth valve group simulation model system is connected to the sixth valve group drive card via the sixth 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.

[0017] The testing method of the once-through steam generator fault protection system of the present invention comprises the following steps:

[0018] 1) The simulation modeling server outputs a trigger signal to the steam generator fault monitoring device, and determines that the steam generator evaporation section is faulty according to the detection signal of the steam generator fault monitoring device;

[0019] 2) The reactor and generator reduce power, the second valve group and the tenth valve group are opened, the fifth valve group is closed, and the eighth valve group is automatically switched on;

[0020] 3) The simulation modeling server drives the sixth valve group to open, the simulation modeling server drives the third valve group to close, the simulation modeling server drives the fourth valve group to close, the simulation modeling server drives the first valve group to close, and the evaporation section of the steam generator is isolated;

[0021] The action signal fed back by the sixth valve group is input into the simulation modeling server to obtain the opening time of the sixth valve group; the action signal fed back by the third valve group is input into the simulation modeling server to obtain the closing response time of the third valve group; the action signal fed back by the fourth valve group is input into the simulation modeling server to obtain the closing response time of the fourth valve group; the action signal fed back by the first valve group is input into the simulation modeling server to obtain the closing response time of the first valve group.

[0022] Furthermore, it also includes:

[0023] During the low-load operation phase of the reactor, steam turbine and generator, the amount of steam entering the steam turbine is automatically controlled through the eighth valve group so that the amount of steam entering the steam turbine matches the amount of steam heated in the steam-water separator.

[0024] The present invention has the following beneficial effects:

[0025] During specific operation, the testing device and method for the DC steam generator fault protection system described in the present invention 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, and performs logic preview and dynamic testing on the DC steam generator fault protection system during the unit commissioning and startup, thereby realizing early verification of the actual function of the DC steam generator fault protection system, exposing and correcting problems existing in the logic configuration of the DC steam generator fault protection system in advance, and greatly improving the reliability of the DC steam generator fault protection system during unit operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a structural schematic diagram of the present invention.

[0028] Among them, 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, 15 is the sixth valve group, 16 is the seventh valve group, 17 is the eighth valve group, 18 is the ninth valve group, 19 is the tenth valve group, 20 is the DCS cabinet of the steam generator safety system, 20-1 is the sixth 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, 20-5 is the steam generator fault monitoring card, 21 is the PXI data acquisition cabinet, 21-1 is the sixth 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 sixth 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, 22-5 is the steam generator fault monitoring simulation model system. DETAILED DESCRIPTION

[0029] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0031] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0032] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0033] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. 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.

[0034] 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 determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0035] 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, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually 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 claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0037] refer to Figure 1 The test device of the direct current steam generator fault protection system of the present invention comprises a reactor 1, a steam generator 2, a steam generator evaporation section 2-1, a steam generator superheating section 2-2, a steam-water separator 3, a steam turbine 4, a generator 5, a condenser 6, a steam generator fault monitoring device 7, a human-machine interface display 8, a water supply system 9, a first valve group 10, a second valve group 11, a third valve group 12, a fourth valve group 13, a fifth valve group 14, a sixth valve group 15, a seventh valve group 16, an eighth valve group 17, a ninth valve group 18, a tenth valve group 19, a steam generator safety system DCS cabinet 20, a PXI data acquisition cabinet 21 and a simulation modeling server 22;

[0038] The reactor 1 is connected to the primary side of the steam generator 2. 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. The outlet of the steam generator superheating section 2-2 is divided into two routes, one of which is connected to the inlet of the steam turbine 4 through the seventh valve group 16, and the other is connected to the inlet of the eighth valve group 17. The outlet of the eighth valve group 17 is divided into two routes, one of which is connected to the inlet of the condenser 6 through the ninth valve group 18, and the other is connected to the inlet of the steam-water separator 3 through the tenth valve group 19. The outlet of the steam turbine 4 is connected to the inlet of the condenser 6;

[0039] 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 through the second valve group 11. 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 liquid outlet of the steam-water separator 3 is connected to the inlet of the condenser 6. 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 sixth valve group 15, and the other is connected to the outlet of the steam generator superheating section 2-2 through the fifth valve group 14.

[0040] The steam generator fault monitoring device 7 is connected to the steam generator 2 and is used to monitor whether a fault occurs in the steam generator evaporation section 2-1. The human-machine interface display 8 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 sixth valve group 15 via the simulation modeling server 22, the PXI data acquisition cabinet 21 and the steam generator safety system DCS cabinet 20.

[0041] The steam generator safety system DCS cabinet 20 includes a DCS cabinet body and a sixth 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 sixth valve group 15 via the sixth 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.

[0042] The Labview data acquisition cabinet 21 includes a data acquisition cabinet body and a sixth 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.

[0043] The simulation modeling server 22 includes a simulation modeling server body and a sixth 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.

[0044] The sixth valve group simulation model system 22-1 is connected to the sixth valve group drive card 20-1 via the sixth 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.

[0045] The specific working process of the safety system function verification described in the present invention is as follows:

[0046] Steam generator evaporation section 2-1 fails, steam generator superheat section 2-2 operates normally:

[0047] 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, the third valve group 12 and the seventh valve group 16 are open, and the second valve group 11, the fourth valve group 13, the fifth valve group 14, the sixth valve group 15, the eighth valve group 17, the ninth valve group 18, the tenth valve group 19 and the eleventh valve group 20 are closed.

[0048] The fault of the evaporation section 2-1 of the steam generator is simulated in the simulation modeling server 22, 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:

[0049] 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 outputs an alarm signal on the human-machine interface display 8.

[0050] 2) The reactor 1 and the generator 5 reduce their power, the second valve group 11 and the tenth valve group 19 are opened, the fifth valve group 14 is closed, and the eighth valve group 17 is put into automatic operation.

[0051] 3) The sixth valve group 15 is driven to open by the sixth valve group driving card 20-1, the third valve group 12 is driven to close by the third valve group driving card 21-2, the fourth valve group 13 is driven to close by the fourth valve group driving card 21-3, and the first valve group 10 is driven to close by the first valve group driving card 21-4, and the steam generator evaporation section 2-1 is isolated.

[0052] The action signal fed back by the sixth valve group 15 is sequentially input into the sixth valve group simulation model system 22-1 through the sixth valve group drive card 20-1 and the sixth valve group drive A / D conversion card 21-1, and then displayed and outputted through the human-machine interface display 8, and the opening time of the sixth valve group 15 is read through 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 through 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 through the human-machine interface display 8, and the closing response time of the third valve group 12 is read through 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 via 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 via 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 via 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 via 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.

[0053] 4) The superheated steam output from the steam generator superheating section 2-2 is divided into two parts, wherein one part of the superheated steam enters the steam turbine 4 through the seventh valve group 16 to perform work, so as to drive the generator 5 to operate at a low load, and the other part of the superheated steam enters the steam-water separator 3 through the eighth valve group 17 and the tenth valve group 19, and exchanges heat with the feed water transported 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 sixth valve group 15 to absorb the heat transferred from the reactor 1 to the steam generator 2, and after being converted into superheated steam, it is supplied to the steam turbine 4 to perform work, so as to form a steam circulation loop; the drained steam output from the steam-water separator 3 enters the condenser 6, and the exhaust steam of the steam turbine 4 enters the condenser 6 to condense into condensed water, so as to supply the unit feed water system 9.

[0054] 5) During the low-load operation phase of the reactor 1, the steam turbine 4 and the generator 5, the amount of steam entering the steam turbine 4 is automatically controlled by the eighth valve group 17, 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.

[0055] By adjusting the parameters of the sixth 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 sixth valve group 15 ≤3s, and the closing response time of the first valve group 10, the third valve group 12, and the fourth valve group 13 ≤1s.

[0056] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and disclosure of the invention. 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 that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0057] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0058] 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 still falls within the protection scope of the technical solution of the present invention.

Claims

1. A testing device for a fault protection system of a direct current steam generator, characterized in that: It comprises a steam generator (2), a steam turbine (4), a condenser (6), 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 sixth valve group (15); 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 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); 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 evaporation section (2-1) of the steam generator is divided into two paths, one of which is connected to the inlet of the superheating section (2-2) of the steam generator 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 superheating section (2-2) of the steam generator through the sixth valve group (15), and the other is connected to the outlet of the superheating section (2-2) of the steam generator; 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 sixth valve group (15).

2. The testing device for the fault protection system of a once-through steam generator according to claim 1, characterized in that: The reactor (1) is connected to the primary side of the steam generator (2).

3. The testing device for the fault protection system of a once-through steam generator according to claim 1, characterized in that: The invention also comprises a human-machine interface display (8), a PXI data acquisition cabinet (21) and a steam generator safety system DCS cabinet (20); the human-machine interface display (8) 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 sixth valve group (15) via the simulation modeling server (22), the PXI data acquisition cabinet (21) and the steam generator safety system DCS cabinet (20).

4. The testing device for the fault protection system of a once-through steam generator according to claim 1, characterized in that: The outlet of the steam generator superheating section (2-2) is divided into two paths, one of which is connected to the inlet of the steam turbine (4) via the seventh valve group (16), and the other is connected to the inlet of the eighth valve group (17). The outlet of the eighth valve group (17) is divided into two paths, one of which is connected to the inlet of the condenser (6) via the ninth valve group (18), and the other is connected to the inlet of the steam-water separator (3) via the tenth valve group (19). The outlet of the steam turbine (4) is connected to the inlet of the condenser (6), and the liquid outlet of the steam-water separator (3) is connected to the inlet of the condenser (6).

5. The testing device for the fault protection system of a once-through steam generator according to claim 1, characterized in that: The outlet of the water supply system (9) is connected to the inlet of the steam-water separator (3) via the second valve group (11).

6. The testing device for the fault protection system of a once-through steam generator according to claim 1, characterized in that: The gas outlet of the steam-water separator (3) is connected to the outlet of the steam generator superheating section (2-2) via the fifth valve group (14).

7. The testing device for the fault protection system of a once-through steam generator according to claim 3, characterized in that: The steam generator safety system DCS cabinet (20) comprises a DCS cabinet body and a sixth 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 sixth valve group (15) via the sixth valve group drive card (20-1), and a Labview data acquisition cabinet (21) is connected to the sixth valve group (15) via the sixth valve group drive card (20-1). 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).

8. The testing device for the fault protection system of a once-through steam generator according to claim 4, characterized in that: The Labview data acquisition cabinet (21) comprises a data acquisition cabinet body and a sixth 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) comprises a simulation modeling server body and a sixth 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 sixth valve group simulation model system (22-1) is connected to the sixth valve group drive card (20-1) via the sixth 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).

9. A method for testing a fault protection system of a once-through steam generator, characterized in that: The testing device of the once-through steam generator fault protection system according to claim 1 comprises the following steps: 1) The simulation modeling server (22) outputs a trigger signal to a steam generator fault monitoring device (7), and determines that the steam generator evaporation section (2-1) is faulty based on a detection signal from the steam generator fault monitoring device (7); 2) The reactor (1) and the generator (5) reduce their power, the second valve group (11) and the tenth valve group (19) are opened, the fifth valve group (14) is closed, and the eighth valve group (17) is put into automatic operation; 3) the simulation modeling server (22) drives the sixth valve group (15) to open, the simulation modeling server (22) drives the third valve group (12) to close, the simulation modeling server (22) drives the fourth valve group (13) to close, the simulation modeling server (22) drives the first valve group (10) to close, and the steam generator evaporation section (2-1) is isolated; The action signal fed back by the sixth valve group (15) is input into the simulation modeling server (22) to obtain the opening time of the sixth valve group (15); the action signal fed back by the third valve group (12) is input into the simulation modeling server (22) to obtain the closing response time of the third valve group (12); the action signal fed back by the fourth valve group is input into the simulation modeling server (22) to obtain the closing response time of the fourth valve group (13); the action signal fed back by the first valve group (10) is input into the simulation modeling server (22) to obtain the closing response time of the first valve group (10).

10. The testing method of the once-through steam generator fault protection system according to claim 9, characterized in that: Also includes: During the low-load operation phase of the reactor (1), the steam turbine (4) and the generator (5), the amount of steam entering the steam turbine (4) is automatically controlled by the eighth valve group (17) so that the amount of steam entering the steam turbine (4) matches the amount of steam heated in the steam-water separator (3).

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