CN112524597A - Water supply system, working method thereof and nuclear power station - Google Patents
Water supply system, working method thereof and nuclear power station Download PDFInfo
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- CN112524597A CN112524597A CN201910885603.7A CN201910885603A CN112524597A CN 112524597 A CN112524597 A CN 112524597A CN 201910885603 A CN201910885603 A CN 201910885603A CN 112524597 A CN112524597 A CN 112524597A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 310
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000001514 detection method Methods 0.000 claims description 4
- 230000005856 abnormality Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000008400 supply water Substances 0.000 description 4
- 238000013507 mapping Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
- F22D5/26—Automatic feed-control systems
- F22D5/34—Applications of valves
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/02—Arrangements of auxiliary equipment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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- High Energy & Nuclear Physics (AREA)
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Abstract
The invention provides a water supply system, a working method thereof and a nuclear power station, wherein the water supply system is applied to the nuclear power station and comprises the following steps: the water supply system comprises a first main water supply pipeline, a second main water supply pipeline and a control system, wherein a first flow limiting valve is arranged in the first main water supply pipeline, and the rated flow of the first main water supply pipeline is equal to the rated water delivery volume of the water supply system; a second flow limiting valve is arranged in the second main water supply pipeline, and the rated flow of the second main water supply pipeline is equal to the rated water delivery quantity of the water supply system; the third flow limiting valve is arranged in the bypass water supply pipeline, and the rated flow of the bypass water supply pipeline is equal to a first preset ratio of the rated water delivery quantity of the water supply system; and the controller is respectively connected with the first flow limiting valve, the second flow limiting valve and the third flow limiting valve and is used for respectively controlling the opening degrees of the first flow limiting valve, the second flow limiting valve and the third flow limiting valve. The water supply system, the working method thereof and the nuclear power station provided by the invention can improve the stability of water supply of the water supply system.
Description
Technical Field
The invention relates to the technical field of nuclear power safety, in particular to a water supply system, a working method thereof and a nuclear power station.
Background
A Steam Generator (SG) is one of three major devices in a nuclear island, is the boundary of a primary loop and a secondary loop of a pressurized water reactor nuclear power station, transfers heat generated by a reactor to the secondary side of the Steam Generator, and the generated Steam is dried by a primary Steam-water separator and a secondary Steam-water separator to drive a turbine Generator to generate electricity.
In the related art, inlets of a plurality of water supply systems are communicated with the same water supply main pipe, the water supply main pipe supplies water to the plurality of water supply systems, and outlets of the plurality of water supply systems are communicated with pipelines of a plurality of SGs in a one-to-one correspondence manner. Because the water supply condition of a plurality of SG's is different, when a certain SG supplies water and changes, can influence the inside water pressure of water supply main pipe unstablely, and then influence other SG's water supply stability, there is the SG water supply and receives the great problem of influence that other SG supplied water.
Disclosure of Invention
The embodiment of the invention provides a water supply system, a working method thereof and a nuclear power station, which aim to solve the problem that the SG water supply is greatly influenced by other SG water supplies because a plurality of SGs share one water supply main pipe in the existing nuclear power station.
In a first aspect, an embodiment of the present invention provides a water supply system, which is applied to a nuclear power plant, and is characterized by including:
the inlet of the first main water supply pipeline is communicated with the water supply main pipe, the outlet of the first main water supply pipeline is communicated with the pipeline of the steam generator, a first flow limiting valve is arranged in the first main water supply pipeline, and the rated flow of the first main water supply pipeline is equal to the rated water delivery volume of the water supply system;
the inlet of the second main water supply pipeline is communicated with the inlet of the first main water supply pipeline, the outlet of the second main water supply pipeline is communicated with the outlet of the first main water supply pipeline, a second flow limiting valve is arranged in the second main water supply pipeline, and the rated flow of the second main water supply pipeline is equal to the rated water delivery quantity of the water supply system;
the inlet of the bypass water supply pipeline is communicated with the inlet of the second main water supply pipeline, the outlet of the bypass water supply pipeline is communicated with the outlet of the second main water supply pipeline, a third flow limiting valve is arranged in the bypass water supply pipeline, and the rated flow of the bypass water supply pipeline is equal to a first preset ratio of the rated water delivery amount of the water supply system;
and the controller is respectively connected with the first current limiting valve, the second current limiting valve and the third current limiting valve and is used for respectively controlling the opening degrees of the first current limiting valve, the second current limiting valve and the third current limiting valve.
Optionally, the power source of the first flow limiting valve is different from the power source of the second flow limiting valve.
Optionally, the first flow limiting valve includes a first opening detector, the second flow limiting valve includes a second opening detector, and the controller is electrically connected to the first opening detector and the second opening detector respectively;
the controller is used for controlling the opening degrees of the first flow limiting valve and the second flow limiting valve according to detection results provided by the first opening degree detector and the second opening degree detector.
Optionally, the controller includes a signal receiver, a first actuator disposed on the first current limiting valve, a second actuator disposed on the second current limiting valve, and a third actuator disposed on the third current limiting valve;
the first executing mechanism is used for adjusting the opening of the first flow limiting valve according to the opening control instruction received by the signal receiver;
the second executing mechanism is used for adjusting the opening of the second flow limiting valve according to the opening control instruction received by the signal receiver;
and the third executing mechanism is used for adjusting the opening of the third flow limiting valve according to the opening control instruction received by the signal receiver.
Optionally, the system further comprises a starting water supply pipeline, an inlet of the starting water supply pipeline is communicated with an inlet of the bypass water supply pipeline, an outlet of the starting water supply pipeline is communicated with an outlet of the bypass water supply pipeline, a fourth flow limiting valve is arranged in the starting water supply pipeline, the rated flow of the starting water supply pipeline is equal to a second preset ratio of the rated water delivery of the water supply system, and the second preset ratio is smaller than the first preset ratio.
In a second aspect, an embodiment of the present invention further provides a control method of a water supply system, which is applied to the water supply system described above, and the method includes:
acquiring an opening control instruction provided by the steam generator;
and adjusting the opening of at least one flow limiting valve in the water supply system based on an opening control instruction provided by the steam generator so that the water supply system provides the water quantity corresponding to the opening control instruction to the steam generator.
Optionally, the opening control instruction includes information of the working current limiting valve and opening adjustment information; the step of adjusting the opening of at least one flow limiting valve in the water supply system based on an opening control instruction provided by the steam generator comprises the following steps:
determining a working flow limiting valve in the water supply system based on working flow limiting valve information provided by the steam generator;
and adjusting the opening of the working flow limiting valve based on opening adjusting information provided by the steam generator.
Optionally, the opening degree adjustment information includes an opening degree increasing instruction; the step of adjusting the opening of the work restriction valve based on opening adjustment information provided by the steam generator includes:
increasing the opening of the working flow limiting valve based on an opening increasing instruction provided by the steam generator; or,
the opening degree adjusting information comprises an opening degree reducing instruction; the step of adjusting the opening of the work restriction valve based on opening adjustment information provided by the steam generator includes:
and reducing the opening of the working flow limiting valve based on an opening reducing instruction provided by the steam generator.
Optionally, the working current limiting valve includes a first current limiting valve and a second current limiting valve; the method further comprises, after the step of adjusting the opening of at least one flow limiting valve in the water supply system based on an opening control command provided by the steam generator:
acquiring the opening degree of the first flow limiting valve through the first opening degree detector;
if the opening change of the first flow limiting valve does not accord with the opening change corresponding to the opening adjusting information, the opening of the second flow limiting valve is further adjusted, so that the total valve opening change amount of the first flow limiting valve and the second flow limiting valve corresponds to the opening adjusting information
In a third aspect, an embodiment of the present invention further provides a nuclear power plant, including the above-mentioned water supply system.
The water supply system provided by the embodiment of the invention has the advantages that two main water supply pipelines and one side water supply pipeline are arranged, multiple paths of water supply pipelines supply water to one SG together, the flow rate of each path of water supply pipeline is small, the adjustment intervals are different, each valve works in the optimal linear adjustment interval, and the linearity of the overall adjustment of all water supply valves on each SG is kept to be better. Therefore, valves in the water supply pipelines are adjusted in a sectional matching manner, so that the SG can be prevented from generating large liquid level fluctuation; in addition, even if the liquid level of a certain SG fluctuates greatly, the influence of the water pressure change of the main water supply pipe on the water supply of other SGs is reduced or even avoided due to the fact that the water supply systems of other SGs adopt a multi-pipeline design, and the stability of the water supply systems is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a water supply system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for controlling a water supply system according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating an opening adjustment range of each valve in a water supply system according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating the operation intervals of valves in a water supply system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a water supply system according to an embodiment of the present invention. The present invention provides a water supply system 100 applied to a nuclear power plant, including:
a first main water supply pipeline 110, wherein an inlet of the first main water supply pipeline 110 is communicated with a water supply main pipe, an outlet of the first main water supply pipeline 110 is communicated with a pipeline of a steam generator, a first flow limiting valve 111 is arranged in the first main water supply pipeline 110, and the rated flow of the first main water supply pipeline 110 is equal to the rated water delivery amount of the water supply system 100;
a second main water supply pipeline 120, an inlet of the second main water supply pipeline 120 is communicated with an inlet of the first main water supply pipeline 110, an outlet of the second main water supply pipeline 120 is communicated with an outlet of the first main water supply pipeline 110, a second flow limiting valve 121 is arranged in the second main water supply pipeline 120, and the rated flow rate of the second main water supply pipeline 120 is equal to the rated water delivery rate of the water supply system 100;
a bypass water pipe 130, an inlet of the bypass water pipe 130 is communicated with an inlet of the second main water pipe 120, an outlet of the bypass water pipe 130 is communicated with an outlet of the second main water pipe 120, a third flow limiting valve 131 is arranged in the bypass water pipe 130, and a rated flow rate of the bypass water pipe 130 is equal to a first preset ratio of a rated water delivery rate of the water supply system 100;
and a controller (not shown) connected to the first current limiting valve 111, the second current limiting valve 121, and the third current limiting valve 131, respectively, for controlling the opening degrees of the first current limiting valve 111, the second current limiting valve 121, and the third current limiting valve 131, respectively.
In the embodiment of the invention, one water supply system 100 is only connected with one water outlet in the water supply main pipe, so that the influence of flow change of the water outlet caused by unstable water pressure in the water supply main pipe can be shared by a plurality of water supply pipelines.
The first main water supply pipeline 110 further comprises two first stop valves 112, the two first stop valves 112 are respectively arranged at two ends of the first limiting valve 111, each first stop valve 112 only has two working states of full opening (maximum opening degree) and full closing (minimum opening degree), the two first stop valves 112 work simultaneously, and when the two first stop valves 112 are in a full opening state simultaneously, the first main water supply pipeline 110 works; when both first shutoff valves 112 are fully closed at the same time, the first main water supply line 110 is closed.
The second main water supply pipeline 120 further comprises two second stop valves 122, the two second stop valves 122 are respectively arranged at two ends of the second flow limiting valve 121, each second stop valve 122 only has two working states of full opening (maximum opening degree) and full closing (minimum opening degree), the two second stop valves 122 work simultaneously, and when the two second stop valves 122 are in the full opening state simultaneously, the second main water supply pipeline 120 works; when both the second shut-off valves 122 are in the fully closed state at the same time, the first main water supply line 120 is closed.
The bypass water supply pipeline 130 further comprises two third stop valves 132, the two third stop valves 132 are respectively arranged at two ends of the third flow limiting valve 131, each third stop valve 132 only has two working states of full opening (maximum opening degree) and full closing (minimum opening degree), the two third stop valves 132 work simultaneously, and when the two third stop valves 132 are in the full opening state simultaneously, the bypass water supply pipeline 130 works; when both of the third shut-off valves 132 are in the fully closed state at the same time, the bypass water line 130 is closed.
The rated flow rate of the bypass water line 130 may be 25%, 30%, 33%, etc. of the rated water delivery rate of the water supply system 100, and is not limited herein. It should be noted that the rated water delivery amount of the water supply system 100 is the maximum water delivery amount of the water supply system 100, and 25% of the rated water delivery amount is 25% of the maximum water delivery amount of the water supply system 100.
The controller is capable of individually controlling the opening of the first, second, and third flow limiting valves 111, 121, and 131 such that the sum of the flow rate of the first main water feed line 110, the flow rate of the second main water feed line 120, and the flow rate of the bypass water feed line 130 equals the amount of water supply required by the steam generator.
The first current limiting valve 111, the second current limiting valve 121 and the third current limiting valve 131 may be all electric valves, hydraulic valves or pneumatic valves; the first flow limiting valve 111 may be an electric valve, and the second flow limiting valve 121 and the third flow limiting valve 131 may be air-operated valves; the second flow limiting valve 121 may be an electrically operated valve, the first flow limiting valve 111 may be a hydraulic valve, and the third flow limiting valve 131 may be an air operated valve, which is not limited herein.
The valve openings of the first, second and third flow limiting valves 111, 121 and 131 may be based on opening control commands provided by the steam generator in combination with valve opening characteristics to determine the opening of the respective flow limiting valves.
The water supply system provided by the embodiment of the invention has the advantages that two main water supply pipelines and one side water supply pipeline are arranged, multiple paths of water supply pipelines supply water to one SG together, the flow rate of each path of water supply pipeline is small, the adjustment intervals are different, each valve works in the optimal linear adjustment interval, and the linearity of the overall adjustment of all water supply valves on each SG is kept to be better. Therefore, valves in the water supply pipelines are adjusted in a sectional matching manner, so that the SG can be prevented from generating large liquid level fluctuation; in addition, even if the liquid level of a certain SG fluctuates greatly, the influence of the water pressure change of the main water supply pipe on the water supply of other SGs is reduced or even avoided due to the fact that the water supply systems of other SGs adopt a multi-pipeline design, and the stability of the water supply systems is improved.
Optionally, the power source of the first flow limiting valve 111 is different from the power source of the second flow limiting valve 121.
The power source is a power source for driving the motion (opening degree change) of the flow limiting valve, for example: the flow limiting valve is an electromagnetic valve, and the power source of the flow limiting valve is different power supply circuits.
In this embodiment, the power source of the first flow limiting valve 111 is different from the power source of the second flow limiting valve 121, and it can be understood that: the first and second constrictor valves 111, 121 are different power-type constrictor valves, such as: the first flow limiting valve 111 is a pneumatic valve, and the second flow limiting valve 121 is a hydraulic valve; alternatively, the first flow restriction valve 111 is an electric valve, and the second flow restriction valve 121 is an air-operated valve. In addition, it can also be understood that: when the first current limiting valve 111 and the second current limiting valve 121 are the same current limiting valve, the sources of power supply are different, for example: when the first current limiting valve 111 and the second current limiting valve 111 are both electrically operated valves, the power supply circuit to the first current limiting valve 111 is different from the power supply circuit to the second current limiting valve 121.
In this embodiment, the power source of the first restriction valve 111 is designed to be different from the power source of the second restriction valve 121, so that the situation that the first restriction valve 111 and the second restriction valve 121 fail at the same time can be avoided, and the reliability of the water supply system can be improved.
Optionally, the first flow limiting valve 111 includes a first opening detector, the second flow limiting valve 121 includes a second opening detector, and the controller is electrically connected to the first opening detector and the second opening detector respectively;
the controller is used for controlling the opening degrees of the first flow limiting valve and the second flow limiting valve according to detection results provided by the first opening degree detector and the second opening degree detector.
In this embodiment, the first opening degree detector can detect the opening degree of the internal valve of the first main water feed pipe 110, and the second opening degree detector can detect the opening degree of the internal valve of the second main water feed pipe 120.
The controller can further send an opening adjustment control instruction on the basis of the opening control instruction sent to the second flow limiting valve when the first opening detector detects that the opening of the first flow limiting valve 111 is smaller than the valve opening corresponding to the opening control instruction sent to the first flow limiting valve 111, so as to further increase the opening of the second flow limiting valve 121 on the opening corresponding to the opening control instruction to compensate for the flow influenced by the abnormality of the first flow limiting valve 111; when the first opening detector detects that the opening of the first flow limiting valve 111 is larger than the valve opening corresponding to the opening control command sent to the first flow limiting valve 111, an opening adjustment control command can be further sent on the basis of the opening control command sent to the second flow limiting valve to further reduce the opening of the second flow limiting valve 121 at the opening corresponding to the opening control command to compensate for the flow affected by the abnormality of the first flow limiting valve 111.
Similarly, when the second opening detector detects that the opening of the second current limiting valve 121 is smaller than the valve opening corresponding to the opening control command sent to the second current limiting valve 121, the controller can further send an opening adjustment control command on the basis of the opening control command sent to the first current limiting valve 111, so as to further increase the opening of the first current limiting valve 111 at the opening corresponding to the opening control command, so as to compensate for the flow affected by the abnormality of the second current limiting valve 121; when the second opening detector detects that the opening of the second flow limiting valve 121 is larger than the valve opening corresponding to the opening control command sent to the second flow limiting valve 121, an opening adjustment control command can be further sent on the basis of the opening control command sent to the first flow limiting valve 111 to further reduce the opening of the first flow limiting valve 111 at the opening corresponding to the opening control command to compensate for the flow affected by the abnormality of the second flow limiting valve 121.
In the present embodiment, when one of the first and second limiting valves 111 and 121 is abnormal, the abnormality can be compensated by the other, so that the entire water supply system is normal and the reliability of the water supply system is improved.
Optionally, the controller includes a signal receiver, and a first actuator disposed on the first current limiting valve 111, a second actuator disposed on the second current limiting valve 121, and a third actuator disposed on the third current limiting valve 131;
the first executing mechanism is used for adjusting the opening degree of the first flow limiting valve 111 according to the opening degree control instruction received by the signal receiver;
the second executing mechanism is used for adjusting the opening degree of the second flow limiting valve 121 according to the opening degree control instruction received by the signal receiver;
the third actuator is configured to adjust the opening of the third flow limiting valve 131 according to the opening control instruction received by the signal receiver.
In this embodiment, the controller controls the opening degrees of the three restriction valves by the first actuator, the second actuator, and the third actuator, respectively.
Optionally, as shown in fig. 1, the water supply system 100 further includes a start-up water supply line 140, an inlet of the start-up water supply line 140 is communicated with an inlet of the bypass water supply line 130, an outlet of the start-up water supply line 140 is communicated with an outlet of the bypass water supply line 130, a fourth flow limiting valve 141 is disposed in the start-up water supply line 140, a rated flow rate of the start-up water supply line 140 is equal to a second preset ratio of a rated water delivery amount of the water supply system 100, and the second preset ratio is smaller than the first preset ratio.
The inlet of the start water supply line 140 is connected between one third stop valve 132 and the inlet of the third flow limiting valve 131, and the outlet of the start water supply line 140 is connected between the other third stop valve 132 and the outlet of the third flow limiting valve 131, so that the start water supply line 140 operates when the two third stop valves 132 are simultaneously in the fully open state; when both of the third shut-off valves 132 are in the fully closed state at the same time, the start-up water supply line 140 is closed.
The rated flow rate of the start-up water supply line 140 may be 2%, 3%, 4%, etc. of the rated water supply rate of the water supply system 100, which is not limited herein.
In this embodiment, because the circulation of single pipeline is great, and the linearity is poor when the limiting valve aperture is less, causes the inaccurate problem of flow control, through first main water supply pipeline 110, second main water supply pipeline 120, by-pass water supply pipeline 130 and the collaborative work of start-up water supply pipeline 140, the small amount of circulation of control that limiting valve aperture can be accurate improves water supply system's circulation control accuracy.
In addition, the starting water supply pipeline can supply water to the water supply system in the starting and stopping stage of the water supply system, and the water supply system is started and closed.
An embodiment of the present invention further provides a control method for a water supply system, which is applied to the water supply system described above, and as shown in fig. 2, the method includes:
step 201: acquiring an opening control instruction provided by the steam generator;
the opening control instruction is provided to the water supply system by the steam generator, and the opening control instruction can be calculated by the steam generator through detecting various internal data, such as: the opening control command may be calculated from information of water level inside the steam generator, or may be calculated from temperature inside the evaporator, etc., and it should be considered that different opening control commands have corresponding water supply amounts.
Step 202: and adjusting the opening of at least one flow limiting valve in the water supply system based on an opening control instruction provided by the steam generator so that the water supply system provides the water quantity corresponding to the opening control instruction to the steam generator.
After the opening control instruction provided by the steam generator is determined, the first flow limiting valve, the second flow limiting valve and the third flow limiting valve are respectively adjusted, so that the sum of the flow of the first main water supply pipeline, the flow of the second main water supply pipeline and the flow of the third main water supply pipeline (namely the water delivery amount of the water supply system) is equal to the water amount corresponding to the opening control instruction.
In the embodiment of the invention, one water supply system is only connected with one water outlet in the water supply main pipe, so that a plurality of water supply pipelines can share the influence of flow change of the water outlet caused by unstable water pressure in the water supply main pipe.
The water supply system provided by the embodiment of the invention has the advantages that two main water supply pipelines and one side water supply pipeline are arranged, multiple paths of water supply pipelines supply water to one SG together, the flow rate of each path of water supply pipeline is small, the adjustment intervals are different, each valve works in the optimal linear adjustment interval, and the linearity of the overall adjustment of all water supply valves on each SG is kept to be better. Therefore, valves in the water supply pipelines are adjusted in a sectional matching manner, so that the SG can be prevented from generating large liquid level fluctuation; in addition, even if the liquid level of a certain SG fluctuates greatly, the influence of the water pressure change of the main water supply pipe on the water supply of other SGs is reduced or even avoided due to the fact that the water supply systems of other SGs adopt a multi-pipeline design, and the stability of the water supply systems is improved.
Optionally, the opening control instruction includes information of the working current limiting valve and opening adjustment information; the step of adjusting the opening of at least one flow limiting valve in the water supply system based on an opening control instruction provided by the steam generator comprises the following steps:
determining a working flow limiting valve in the water supply system based on working flow limiting valve information provided by the steam generator;
and adjusting the opening of the working flow limiting valve based on opening adjusting information provided by the steam generator.
The working restriction valve may be only the first restriction valve, only the second restriction valve, only the third restriction valve, only the first restriction valve and the third restriction valve, only the second restriction valve and the third restriction valve, or only the first restriction valve, the second restriction valve and the third restriction valve, and is not limited herein.
And after determining which of the working flow limiting valves belong to the current working flow limiting valve, the controller controls the opening of the working flow limiting valve according to the opening adjusting information.
In this embodiment, which of the current limiting valves in the water supply system belong to the working limiting valve may depend on a ratio of current power of the nuclear reactor to rated power, and the steam generator determines the working limiting valve in the water supply system by determining the ratio of current power of the nuclear reactor to rated power.
Specifically, the manner in which the evaporator generator determines the operational flow restriction valve in the water supply system may be determined by a preset mapping, such as: when the water supply system only includes the scheme of the first flow limiting valve, the second flow limiting valve and the third flow limiting valve, the preset mapping relationship may include:
when the current power proportion of the nuclear reactor is below 20%, the working current limiting valve is the third current limiting valve;
when the current power proportion of the nuclear reactor is 20-45%, the working current limiting valves are the first current limiting valve and the third current limiting valve;
when the current power proportion of the nuclear reactor is more than 45%, the working current limiting valves are the first current limiting valve, the second current limiting valve and the third current limiting valve;
when the water supply system only includes the first flow limiting valve, the second flow limiting valve, the third flow limiting valve, and the fourth flow limiting valve, as shown in fig. 3 and 4, the preset mapping relationship may include:
when the current power proportion of the nuclear reactor is below 2%, the working current limiting valve is the fourth current limiting valve;
when the current power proportion of the nuclear reactor is 2-20%, the working current limiting valve is the third current limiting valve;
when the current power proportion of the nuclear reactor is 20-45%, the working current limiting valves are the first current limiting valve and the third current limiting valve;
and when the current power proportion of the nuclear reactor is more than 45%, the working current limiting valves are the first current limiting valve, the second current limiting valve and the third current limiting valve.
Further, the opening degree adjusting information comprises an opening degree increasing instruction; the step of adjusting the opening of the work restriction valve based on opening adjustment information provided by the steam generator includes:
increasing the opening of the working flow limiting valve based on an opening increasing instruction provided by the steam generator; or,
the opening degree adjusting information comprises an opening degree reducing instruction; the step of adjusting the opening of the work restriction valve based on opening adjustment information provided by the steam generator includes:
and reducing the opening of the working flow limiting valve based on an opening reducing instruction provided by the steam generator.
In this embodiment, the opening degree of the working restriction valve is controlled by adjusting the valve to be larger or smaller.
The opening adjustment information is an opening adjustment instruction or an opening adjustment instruction, and the opening adjustment information can be determined by calculating a water level difference value after the steam generator determines an internal water level value and a required water level value corresponding to the current power ratio of the nuclear reactor. When the water level difference is large, the opening degree adjusting information provided by the steam evaporator to the water supply system is an opening degree increasing instruction, and the water quantity provided by the water supply system to the steam generator is increased; when the water level difference is small, the opening adjusting information provided by the steam generator to the water supply system is an opening decreasing instruction, and the water quantity provided by the water supply system to the steam generator is reduced.
When the water supply system receives the opening degree reducing instruction, the controller uniformly reduces the opening degree of the working flow limiting valve; and when the water supply system receives the opening degree increasing instruction, the controller increases the opening degree of the working flow limiting valve in a unified manner.
Optionally, the first flow limiting valve includes a first opening detector, the second flow limiting valve includes a second opening detector, and the controller is electrically connected to the first opening detector and the second opening detector respectively; the controller is used for controlling the opening degrees of the first flow limiting valve and the second flow limiting valve according to detection results provided by the first opening degree detector and the second opening degree detector;
the working current limiting valve comprises a first current limiting valve and a second current limiting valve; the method further comprises, after the step of adjusting the opening of at least one flow limiting valve in the water supply system based on an opening control command provided by the steam generator:
acquiring the opening degree of the first flow limiting valve through the first opening degree detector;
and if the opening change of the first flow limiting valve does not accord with the opening change corresponding to the opening adjusting information, further adjusting the opening of the second flow limiting valve to enable the total valve opening change amount of the first flow limiting valve and the second flow limiting valve to correspond to the opening adjusting information.
In this embodiment, the first current limiting valve and the second current limiting valve both belong to working current limiting valves.
In this embodiment, the first opening detector can detect the opening of the first main water supply line internal valve, and the second opening detector can detect the opening of the second main water supply line internal valve.
The difference between the change in the opening degree of the first flow restriction valve and the change in the opening degree corresponding to the opening degree adjustment information may be understood as the opening degree of the first flow restriction valve not changing or the opening degree becoming smaller when the opening degree adjustment information is the opening degree increase instruction. In addition, in the case where the opening degree adjustment information includes an opening degree change speed, the fact that the opening degree change of the first restriction valve does not coincide with the opening degree change corresponding to the opening degree adjustment information may also be understood as the difference between the opening degree change speed of the first restriction valve and the opening degree change speed of the opening degree adjustment information.
The controller can further adjust the opening degree of the second flow limiting valve to compensate for the influence of the abnormality of the first flow limiting valve when the first opening degree detector detects that the opening degree change of the first flow limiting valve does not accord with the opening degree change corresponding to the opening degree adjustment information. For example: when the opening degree adjusting information is an opening degree increasing instruction, the opening degree of the first flow limiting valve is not changed, and then the second flow limiting valve is further increased on the basis of the original opening degree increasing instruction to compensate the flow influenced by the abnormality of the first flow limiting valve.
In this embodiment, the first opening degree detector and the second opening degree detector can compensate for an abnormality of one of the first flow limiting valve and the second flow limiting valve by the other of the first flow limiting valve and the second flow limiting valve, so that the whole water supply system is normal, and the reliability of the water supply system is improved.
The embodiment of the invention also provides a nuclear power station which comprises the water supply system.
Since other structures of the nuclear power plant except the water supply system are in the prior art, and the water supply system does not affect other structures, detailed descriptions of the specific structure of the nuclear power plant are omitted in this embodiment.
The nuclear power plant provided by the embodiment has the beneficial effects of the water supply system, and the description is omitted here.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A water supply system applied to a nuclear power plant is characterized by comprising:
the inlet of the first main water supply pipeline is communicated with the water supply main pipe, the outlet of the first main water supply pipeline is communicated with the pipeline of the steam generator, a first flow limiting valve is arranged in the first main water supply pipeline, and the rated flow of the first main water supply pipeline is equal to the rated water delivery volume of the water supply system;
the inlet of the second main water supply pipeline is communicated with the inlet of the first main water supply pipeline, the outlet of the second main water supply pipeline is communicated with the outlet of the first main water supply pipeline, a second flow limiting valve is arranged in the second main water supply pipeline, and the rated flow of the second main water supply pipeline is equal to the rated water delivery quantity of the water supply system;
the inlet of the bypass water supply pipeline is communicated with the inlet of the second main water supply pipeline, the outlet of the bypass water supply pipeline is communicated with the outlet of the second main water supply pipeline, a third flow limiting valve is arranged in the bypass water supply pipeline, and the rated flow of the bypass water supply pipeline is equal to a first preset ratio of the rated water delivery amount of the water supply system;
and the controller is respectively connected with the first current limiting valve, the second current limiting valve and the third current limiting valve and is used for respectively controlling the opening degrees of the first current limiting valve, the second current limiting valve and the third current limiting valve.
2. The water supply system of claim 1, wherein the power source of the first constrictor valve is different than the power source of the second constrictor valve.
3. The water supply system of claim 2, wherein the first flow limiting valve includes a first opening detector, the second flow limiting valve includes a second opening detector, and the controller is electrically connected to the first and second opening detectors, respectively;
the controller is used for controlling the opening degrees of the first flow limiting valve and the second flow limiting valve according to detection results provided by the first opening degree detector and the second opening degree detector.
4. The water supply system of claim 1, wherein the controller includes a signal receiver, and a first actuator disposed at the first flow restriction valve, a second actuator disposed at the second flow restriction valve, and a third actuator disposed at the third flow restriction valve;
the first executing mechanism is used for adjusting the opening of the first flow limiting valve according to the opening control instruction received by the signal receiver;
the second executing mechanism is used for adjusting the opening of the second flow limiting valve according to the opening control instruction received by the signal receiver;
and the third executing mechanism is used for adjusting the opening of the third flow limiting valve according to the opening control instruction received by the signal receiver.
5. The water supply system of claim 1, further comprising a startup water supply line, an inlet of the startup water supply line being in communication with an inlet of the bypass water supply line, an outlet of the startup water supply line being in communication with an outlet of the bypass water supply line, a fourth flow limiting valve being disposed in the startup water supply line, a rated flow rate of the startup water supply line being equal to a second preset ratio of a rated water delivery of the water supply system, the second preset ratio being less than the first preset ratio.
6. A control method of a water supply system, applied to the water supply system according to any one of claims 1 to 5, characterized in that the method comprises:
acquiring an opening control instruction provided by the steam generator;
and adjusting the opening of at least one flow limiting valve in the water supply system based on an opening control instruction provided by the steam generator so that the water supply system provides the water quantity corresponding to the opening control instruction to the steam generator.
7. The method of claim 6, wherein the opening control command comprises operational restriction valve information and opening adjustment information; the step of adjusting the opening of at least one flow limiting valve in the water supply system based on an opening control instruction provided by the steam generator comprises the following steps:
determining a working flow limiting valve in the water supply system based on working flow limiting valve information provided by the steam generator;
and adjusting the opening of the working flow limiting valve based on opening adjusting information provided by the steam generator.
8. The method according to claim 7, wherein the opening degree adjustment information includes an opening degree increase instruction; the step of adjusting the opening of the work restriction valve based on opening adjustment information provided by the steam generator includes:
increasing the opening of the working flow limiting valve based on an opening increasing instruction provided by the steam generator; or,
the opening degree adjusting information comprises an opening degree reducing instruction; the step of adjusting the opening of the work restriction valve based on opening adjustment information provided by the steam generator includes:
and reducing the opening of the working flow limiting valve based on an opening reducing instruction provided by the steam generator.
9. The method of claim 7, applied to a water supply system as claimed in claim 3, and wherein the operational flow-limiting valve comprises a first flow-limiting valve and a second flow-limiting valve; the method further comprises, after the step of adjusting the opening of at least one flow limiting valve in the water supply system based on an opening control command provided by the steam generator:
acquiring the opening degree of the first flow limiting valve through the first opening degree detector;
and if the opening change of the first flow limiting valve does not accord with the opening change corresponding to the opening adjusting information, further adjusting the opening of the second flow limiting valve to enable the total valve opening change amount of the first flow limiting valve and the second flow limiting valve to correspond to the opening adjusting information.
10. Nuclear power plant, characterized in that it comprises a watering system according to any one of claims 1-5.
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| CN201910885603.7A CN112524597B (en) | 2019-09-19 | 2019-09-19 | Water supply system, working method thereof and nuclear power station |
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| CN201910885603.7A CN112524597B (en) | 2019-09-19 | 2019-09-19 | Water supply system, working method thereof and nuclear power station |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6284204A (en) * | 1985-10-04 | 1987-04-17 | 株式会社日立製作所 | Controller for feed water to steam generating plant |
| JPH04356655A (en) * | 1991-05-31 | 1992-12-10 | Noritz Corp | Bypassing mixing control system |
| US5271044A (en) * | 1991-03-14 | 1993-12-14 | Hitachi, Ltd. | Boiling water nuclear reactor and start-up process thereof |
| CN107543141A (en) * | 2017-09-19 | 2018-01-05 | 中国核动力研究设计院 | Steam generator analogue body water supply system and control method during increasing temperature and pressure |
| CN208579320U (en) * | 2018-06-21 | 2019-03-05 | 中山嘉明电力有限公司 | Pressure water supply system in a kind of power plant |
| CN210688183U (en) * | 2019-09-19 | 2020-06-05 | 华龙国际核电技术有限公司 | Water supply system and nuclear power plant |
-
2019
- 2019-09-19 CN CN201910885603.7A patent/CN112524597B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6284204A (en) * | 1985-10-04 | 1987-04-17 | 株式会社日立製作所 | Controller for feed water to steam generating plant |
| US5271044A (en) * | 1991-03-14 | 1993-12-14 | Hitachi, Ltd. | Boiling water nuclear reactor and start-up process thereof |
| JPH04356655A (en) * | 1991-05-31 | 1992-12-10 | Noritz Corp | Bypassing mixing control system |
| CN107543141A (en) * | 2017-09-19 | 2018-01-05 | 中国核动力研究设计院 | Steam generator analogue body water supply system and control method during increasing temperature and pressure |
| CN208579320U (en) * | 2018-06-21 | 2019-03-05 | 中山嘉明电力有限公司 | Pressure water supply system in a kind of power plant |
| CN210688183U (en) * | 2019-09-19 | 2020-06-05 | 华龙国际核电技术有限公司 | Water supply system and nuclear power plant |
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