CN113746196B - Nuclear power plant emergency power supply control system and method - Google Patents
Nuclear power plant emergency power supply control system and method Download PDFInfo
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- CN113746196B CN113746196B CN202111029436.XA CN202111029436A CN113746196B CN 113746196 B CN113746196 B CN 113746196B CN 202111029436 A CN202111029436 A CN 202111029436A CN 113746196 B CN113746196 B CN 113746196B
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- 229910052744 lithium Inorganic materials 0.000 claims abstract description 106
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 88
- 239000001257 hydrogen Substances 0.000 claims abstract description 88
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 86
- 238000010248 power generation Methods 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 11
- 238000012546 transfer Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 6
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- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
- H02S10/12—Hybrid wind-PV energy systems
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention discloses a nuclear power plant emergency power supply control system and a method, wherein the system comprises the following steps: the system comprises a direct current bus, a lithium battery power supply device, a solar power supply device, a wind power supply device, a hydrogen power supply device, a system working power supply, a double-power automatic change-over switch and an energy management device; the energy management device comprises a standby working condition control unit and an emergency working condition control unit, wherein the emergency working condition control unit comprises a time judging module for judging whether the time for entering the emergency working condition is lower than a time threshold value or not and selectively outputting a lithium battery power supply signal or an auxiliary energy power supply signal. In the nuclear power plant emergency power supply control system and method, three clean energy power supply devices are arranged and managed through the energy management device, so that clean energy is effectively utilized to supply power and charge under the condition of ensuring emergency power supply, the reliability of the system is improved, the operation and maintenance difficulty is reduced, the electricity cost is reduced, and the exhaust emission and noise pollution are reduced.
Description
Technical Field
The invention relates to the technical field of emergency power supplies of nuclear power plants, in particular to a control system and method for an emergency power supply of a nuclear power plant.
Background
At present, a nuclear power plant LLS (hydraulic test pump turbo generator set), an emergency command center and a guard building are all provided with 380V emergency diesel engines and power distribution equipment. When the external power supply is lost, the emergency diesel engine generates power to supply power to the downstream emergency load, and the diesel generator has the following problems:
(1) The system is complex, and mechanical rotation equipment is contained, so that the equipment failure rate is high, and the risk of start failure is high;
(2) Exhaust gas generated by diesel combustion is discharged during power generation, so that the environment is polluted;
(3) The noise is large during power generation, and peripheral personnel are affected;
(4) The oil storage tank occupies a large area, and the diesel oil in the oil tank is replaced regularly with high cost.
Disclosure of Invention
The invention aims to overcome the defects and provides an improved emergency power supply control system and method for a nuclear power plant.
The technical scheme adopted for solving the technical problems is as follows: provided is a nuclear power plant emergency power supply control system, including:
a direct current bus;
the lithium battery power supply device is connected with the direct current bus and is used for providing electric energy for the lithium battery;
the solar power supply device is connected with the direct current bus and used for providing solar power generation electric energy;
the wind energy power supply device is connected with the direct current bus and is used for providing wind energy to generate electric energy;
the hydrogen power supply device is connected with the direct current bus and is used for providing hydrogen power generation electric energy;
the system working power supply is connected with the direct current bus and used for providing system working electric energy;
the dual-power automatic change-over switch is respectively connected with the commercial power, the downstream load and the direct current bus and is used for selectively connecting the commercial power with the downstream load or the direct current bus with the downstream load according to the closing switch condition of the commercial power; and
an energy management device, the energy management device comprising:
the standby working condition control unit is used for starting a standby working condition when the dual-power automatic change-over switch is used for switching on the commercial power and the downstream load; the standby working condition control unit comprises a standby charging module which is used for judging whether the capacity of the lithium battery power supply device is lower than a capacity threshold value or not and selectively outputting a standby charging signal; the solar power supply device and the wind power supply device are also used for charging the lithium battery power supply device according to the standby charging signal;
the emergency working condition control unit is used for starting an emergency working condition when the dual-power automatic change-over switch is connected with the direct-current bus and the downstream load; the emergency working condition control unit comprises a time judging module, a control module and a control module, wherein the time judging module is used for judging whether the time for entering the emergency working condition is lower than a time threshold value or not and selectively outputting a lithium battery power supply signal or an auxiliary energy power supply signal; the lithium battery power supply device is further used for supplying power to the downstream load according to the lithium battery power supply signal, and the solar power supply device, the wind power supply device and the hydrogen power supply device are further used for supplying power to the downstream load according to the auxiliary energy power supply signal.
Preferably, the emergency working condition control unit further comprises an emergency charging module, which is used for judging whether the sum of the power of the solar power supply device, the wind power supply device and the hydrogen power supply device exceeds the power required by the downstream load, and selectively outputting an emergency charging signal; the solar power supply device, the wind power supply device and the hydrogen power supply device are also used for charging the lithium battery power supply device according to the emergency charging signal.
Preferably, the standby working condition control unit further comprises a clean power supply module, which is used for judging whether the output power of the solar power supply device and the wind power supply device exceeds a power threshold value or not, and selectively outputting a clean charging signal or a commercial power charging signal; the solar power supply device and the wind power supply device are also used for charging the lithium battery power supply device according to the cleaning charging signal; the commercial power is also used for charging the lithium battery power supply device according to the commercial power charging signal.
Preferably, the emergency working condition control unit further comprises a lithium battery protection module, and the lithium battery protection module is used for judging whether the state of charge of the lithium battery power supply device is lower than a state of charge threshold value or not and selectively outputting a lithium battery alarm signal.
Preferably, the emergency working condition control unit further comprises a hydrogen leakage monitoring module, which is used for judging whether the hydrogen leakage data exceeds a safety threshold value and selectively outputting a hydrogen leakage alarm signal.
The emergency power supply control method for the nuclear power plant is further provided, and the emergency power supply control system for the nuclear power plant is used for executing the following steps:
s1, judging whether the commercial power is on, if so, executing the step S2, and if not, executing the step S3;
s2, switching on the commercial power and the downstream load, starting a standby working condition, judging whether the capacity of the lithium battery power supply device is lower than a capacity threshold value, and if yes, outputting a standby charging signal; the solar power supply device and the wind power supply device charge the lithium battery power supply device according to the standby charging signal;
s3, connecting a direct current bus with the downstream load, starting an emergency working condition, judging whether the time for entering the emergency working condition is lower than a time threshold, and if yes, outputting a lithium battery power supply signal; if not, outputting an auxiliary energy power supply signal; the lithium battery power supply device supplies power to the downstream load according to the lithium battery power supply signal, and the solar power supply device, the wind power supply device and the hydrogen power supply device supply power to the downstream load according to the auxiliary energy power supply signal.
Preferably, the step S3 further includes a step S31: judging whether the sum of the power of the solar power supply device, the wind power supply device and the hydrogen power supply device exceeds the power required by the downstream load, and if so, outputting an emergency charging signal; the solar power supply device, the wind power supply device and the hydrogen power supply device charge the lithium battery power supply device according to the emergency charging signal.
Preferably, step S2 further includes S21; judging whether the output power of the solar power supply device and the wind power supply device exceeds a power threshold value, and if so, outputting a cleaning charging signal; if not, outputting a mains supply charging signal; the solar power supply device and the wind power supply device charge the lithium battery power supply device according to the cleaning charging signal; and the commercial power charges the lithium battery power supply device according to the commercial power charging signal.
Preferably, the step S3 further includes S32: and judging whether the state of charge of the lithium battery power supply device is lower than a state of charge threshold, and if so, outputting a lithium battery alarm signal.
Preferably, the step S3 further includes S33: and judging whether the hydrogen leakage data exceeds a safety threshold, and if so, outputting a hydrogen leakage alarm signal.
The implementation of the invention has the beneficial effects that: in the nuclear power plant emergency power supply control system and method, three clean energy power supply devices are arranged: the solar power supply device, the wind power supply device and the hydrogen power supply device are managed through the energy management device; under the standby working condition, charging the lithium battery power supply device; under emergency working conditions, the lithium battery and the clean energy source are triggered to supply power according to the time, so that under the condition of ensuring the supply of an emergency power source, the clean energy source is effectively utilized to supply power and charge, a 380V emergency diesel engine in the prior art is replaced, the reliability of the system is improved, the operation and maintenance difficulty is reduced, the electricity cost is reduced, and the exhaust emission and noise pollution are reduced.
Specifically, the emergency power supply control system and method for the nuclear power plant comprise the following steps:
1) The emergency power supply system has the advantages that no mechanical rotating part exists, important modules are connected in parallel, and redundancy is arranged, so that the reliability of the emergency power supply system can be improved;
2) The system consists of standardized equipment modules, so that the operation and maintenance are convenient;
3) The sea wind energy and solar energy resources are rich, renewable energy sources such as solar energy and wind energy are utilized, and the electricity cost is reduced;
4) The exhaust emission caused by emergency power supply is avoided, and the carbon emission is reduced;
5) The power generation noise is low, and the possibility that the power plant staff gets occupational diseases is reduced.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic block diagram of a nuclear power plant emergency power control system in accordance with some embodiments of the present invention;
FIG. 2 is a schematic block diagram of the energy management device of FIG. 1;
FIG. 3 is a flow chart of a method of emergency power control for a nuclear power plant in some embodiments of the invention;
FIG. 4 is a flow chart of step S21 of a nuclear power plant emergency power control method in some embodiments of the invention;
FIG. 5 is a flowchart of step S31 of a nuclear power plant emergency power control method in some embodiments of the present invention;
FIG. 6 is a flow chart of step S32 of a nuclear power plant emergency power control method in some embodiments of the invention;
FIG. 7 is a flowchart of step S33 of a nuclear power plant emergency power control method in some embodiments of the invention.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
FIG. 1 illustrates a nuclear power plant emergency power control system 100 for providing emergency power and providing different charging and power modes according to different operating conditions in some embodiments of the present invention. According to the nuclear power plant emergency power supply control system 100 in some embodiments of the invention, a 380V emergency diesel engine is canceled, and new energy technologies such as wind power, solar energy, hydrogen energy, lithium batteries and the like are introduced into the nuclear power plant emergency power supply system, so that a novel nuclear power plant 380V emergency power supply system mainly comprising hydrogen batteries is formed.
The emergency power supply control system 100 for a nuclear power plant in the embodiment of the invention comprises a direct current bus 10, a lithium battery power supply device 20, a solar power supply device 30, a wind power supply device 40, a hydrogen power supply device 50, a system working power supply 60, a dual-power automatic change-over switch 70 and an energy management device 80. The direct current bus 10 connects an external downstream load 300 and the commercial power 200, and merges the respective modules; the dual-power automatic transfer switch 70 is used for selecting the direct current bus 10 or the commercial power 200 to switch on the downstream load 300 according to whether the commercial power 200 is switched off; the system operation power supply 60 is used for providing power for the interior of the emergency power supply control system 100 of the nuclear power plant; the solar power supply device 30, the wind power supply device 40 and the hydrogen power supply device 50 provide clean energy; the energy management device 80 is used for controlling the charging and power supply relation among the modules under different working conditions; the lithium battery powered device 20 is used to charge a downstream load 300 or to charge a dc bus 10.
The dc bus 10 is connected to an external downstream load 300 and the commercial power 200, and the dc bus 10 is also connected to the lithium battery power supply device 20, the solar power supply device 30, the wind power supply device 40, and the hydrogen power supply device 50, and the power supply devices are converged to the dc bus. The advantage of providing a dc bus 10 is that the problem of synchronization of ac buses can be solved. The charging process between the lithium battery power supply device 20, the solar power supply device 30, the wind power supply device 40, and the hydrogen power supply device 50, and the power supply process of the downstream load 300 by the power supply devices are also converted by the dc bus 10.
The system operation power supply 60 is connected to the dc bus 10 for supplying system operation power. I.e., the system operating power supply 60 provides internal operating power to the nuclear power plant emergency power control system 100 of the present embodiment.
The dual automatic power switch 70 is respectively connected to the utility power 200, the downstream load 300 and the dc bus 10, and the dual automatic power switch 70 is used for selectively switching on the utility power 200 and the downstream load 300 or the dc bus 10 and the downstream load 300 according to the switching-on condition of the utility power 200. Specifically, the closed switch condition herein includes the mains 200 being closed and the mains 200 being opened, and the dual power automatic transfer switch 70 selects the dc bus 10 or the mains 200 to turn on the downstream load 300 according to whether the mains 200 is opened. When the mains supply 200 is on, i.e. the mains supply 200 is supplying power normally, the mains supply 200 and the downstream load 300 are turned on; when the utility power 200 is turned off, i.e., the utility power 200 cannot normally supply power, the direct current bus 10 and the downstream load 300 are turned on.
The lithium battery power supply device 20 is connected with the direct current bus 10 and is used for supplying lithium battery power. In some embodiments, the lithium battery power supply 20 includes a lithium battery, a bidirectional dc converter, and a current transformer, which are sequentially connected so that electric power between the lithium battery and the dc bus 10 can be bidirectionally supplied. The specific embodiment of the lithium battery power supply device 20 is not limited thereto, and may be realized by a bidirectional power supply function.
The solar power supply device 30 is connected to the dc bus 10 for providing solar power generation. In some embodiments, the solar power supply device 30 includes a solar power generation module, a unidirectional dc converter, and a current transformer, which are sequentially connected, so that the solar power supply device 30 converts solar energy into electric energy. The specific embodiment of the solar power supply device 30 is not limited thereto, and a function of supplying power by solar energy may be realized.
The wind power supply device 40 is connected with the direct current bus 10 and is used for providing wind power generation electric energy. In some embodiments, the wind power supply 40 includes a wind power generation module, a rectifier, and a current transformer, which are sequentially connected, such that the wind power supply 40 converts wind energy into electrical energy. The specific embodiment of the wind power supply device 40 is not limited thereto, as long as the function of supplying power by wind power can be realized.
The hydrogen power supply device 50 is connected with the direct current bus 10 and is used for providing hydrogen power generation electric energy. In some embodiments, the hydrogen power supply 50 comprises a PEM hydrogen cell module, a unidirectional dc converter, and a current transformer, which are connected in sequence, such that the hydrogen power supply 50 converts hydrogen in the compressed air into electrical energy. The specific embodiment of the hydrogen power supply device 50 is not limited to this, as long as the function of supplying power by hydrogen can be realized.
For example, in some embodiments, the hydrogen power supply 50 includes a hydrogen bottle having hydrogen stored therein, thereby converting the hydrogen in the hydrogen bottle into electrical energy.
In other preferred embodiments, hydrogen power supply 50 also includes an electrolyzed water hydrogen production apparatus for producing hydrogen by electrolysis of water. This has the advantage that the consumed hydrogen can be supplemented when the wind and light energy is sufficient, thereby enhancing the self-completeness and energy efficiency in the system. Compared with the arrangement of a hydrogen bottle, the water electrolysis hydrogen production device can avoid the trouble that the hydrogen in the hydrogen bottle needs to be replaced after the hydrogen is used up, and is more convenient. The energy management device 80 includes a standby condition control unit 81 and an emergency condition control unit 82. In some embodiments, the energy management device 80 is configured to monitor voltage and current data of each power supply such as the lithium battery power supply device 20, the solar power supply device 30, the wind power supply device 40, and the hydrogen power supply device 50, identify an available state of each power supply, control a power supply ratio of each power supply, and utilize solar energy and wind energy as much as possible.
As shown in fig. 1 and 2, the standby mode control unit 81 is configured to start the standby mode when the dual-power automatic transfer switch 70 turns on the utility power 200 and the downstream load 300. Specifically, the standby condition control unit 81 includes a standby charging module 811 and a clean power supply module 812.
The backup charging module 811 is configured to determine whether the capacity of the lithium battery power supply device 20 is lower than a capacity threshold, and selectively output a backup charging signal. If the capacity of the lithium battery power supply device 20 is lower than the capacity threshold, a standby charging signal is not output; if the capacity of the lithium battery powered device 20 is below the capacity threshold, a backup charge signal is output. The solar power supply device 30 and the wind power supply device 40 are also used for charging the lithium battery power supply device 20 according to the standby charging signal. Alternatively, the capacity threshold is 50% -70%. Preferably, the capacity threshold is 60%. In some embodiments, when the capacity of the lithium battery power supply 20 is less than 60%, the solar power supply 30 and the wind power supply 40 charge the lithium battery power supply 20 to 80% preferentially, and if the solar power supply 30 and the wind power supply 40 are not available, the commercial power 200 charges the lithium battery power supply 20.
The wind power supply device 40 and the solar power supply device 30 are relatively affected by environmental factors, for example, no solar energy is available at night or no wind is available at this time, and wind power and solar energy are not available at this time.
The clean power supply module 812 is configured to determine whether the output power of the solar power supply device 30 and the wind power supply device 40 exceeds a power threshold, and selectively output a clean charging signal or a mains charging signal. If the output power of the solar power supply device 30 and the wind power supply device 40 exceeds the power threshold, a clean charging signal is output, and the lithium battery power supply device 20 is charged by clean energy; if the output power of the solar power supply device 30 and the wind power supply device 40 does not exceed the power threshold, a commercial power charging signal is output, and the lithium battery power supply device 20 is charged by the commercial power 200. The solar power supply device 30 and the wind power supply device 40 are also used for charging the lithium battery power supply device 20 according to the cleaning charging signal; the utility power 200 is also used for charging the lithium battery power supply device 20 according to the utility power charging signal. In some embodiments, assuming that the power requirement of the system operating power supply 60 is P and the wind power and solar power supply power is less than P, the power difference is supplied by the utility power 200 through the clean power supply module 812 in the energy management system. In some embodiments, under standby conditions, the downstream load 300 is powered by the mains supply 200 (voltage 380V), the hydrogen supply device 50 is in a standby state, and the system operating power supply 60 is preferentially powered by the solar power supply device 30 and the wind power supply device 40, and if the solar power supply device 30 and the wind power supply device 40 are not available, the system operating power supply 60 is powered by the mains supply 200.
The emergency condition control unit 82 is used for starting an emergency condition when the dual-power automatic transfer switch 70 turns on the direct-current bus 10 and the downstream load 300. In some preferred embodiments, under emergency conditions, the commercial power 200 (main power supply) is lost, the power supply of the downstream load 300 is automatically switched to the power supply of the emergency power supply, the power supply of the downstream load is supplied by the lithium battery power supply device 20 in the early stage of emergency, the power supply of the solar power supply device 30 and the wind power supply device 40 is preferentially supplied by the middle and later stage of emergency, if the solar power supply device 30 and the wind power supply device 40 are not available, the power supply of the hydrogen power supply device 50 is supplied. The lithium battery power supply device 20 is used as a regulating system, absorbs electric energy when the hydrogen power supply device 50, the solar power supply device 30 and the wind power supply device 40 can output more than downstream load, and provides peak load when the output of the hydrogen power supply device 50, the solar power supply device 30 and the wind power supply device 40 is smaller than the load demand, so that the output voltage is ensured to be stable.
The emergency condition control unit 82 includes a time judging module 821, an emergency charging module 822, a lithium battery protecting module 823, and a hydrogen leakage monitoring module 824.
The time judging module 821 is configured to judge whether the time for entering the emergency working condition is lower than a time threshold, and selectively output a lithium battery power supply signal or an auxiliary energy power supply signal; the lithium battery power supply device 20 is further used for supplying power to the downstream load 300 according to the lithium battery power supply signal, and the solar power supply device 30, the wind power supply device 40 and the hydrogen power supply device 50 are further used for supplying power to the downstream load 300 according to the auxiliary energy power supply signal. In some embodiments, the time threshold is 5-10 minutes. Preferably, the time threshold is 5min. In some embodiments, the initial period of emergency is 0-5 minutes; the middle period of emergency is 5-10min; and the later period of emergency is 10min, and the emergency is ended.
The emergency charging module 822 is configured to determine whether the sum of the power of the solar power supply device 30, the wind power supply device 40, and the hydrogen power supply device 50 exceeds the power required by the downstream load 300, and selectively output an emergency charging signal; the solar power supply device 30, the wind power supply device 40 and the hydrogen power supply device 50 are further used for charging the lithium battery power supply device 20 according to the emergency charging signal. In some embodiments, if the load demand of the downstream load 300 is P1, the hydrogen power supply device 50, the solar power supply device 30, and the wind power supply device 40 output P2, P2< P1, then the lithium battery power supply device 20 provides P1-P2 power.
The lithium battery protection module 823 is configured to determine whether the state of charge of the lithium battery power supply device 20 is lower than a state of charge threshold, and selectively output a lithium battery alarm signal. In some embodiments, the energy management device 80 also controls the SOC (State of charge, i.e., state of charge) of the lithium battery powered device 20, defined numerically as the ratio of the remaining capacity to the battery capacity, expressed as a common percentage), to remain between 60% and 80%, via the lithium battery protection module 823. Alternatively, the state of charge threshold is 60% to 80%. Preferably, the state of charge threshold is 70%.
The hydrogen leakage monitoring module 824 is configured to determine whether the hydrogen leakage data exceeds a safety threshold, and selectively output a hydrogen leakage alarm signal. In some embodiments, the energy management device 80 also monitors the hydrogen leakage data of the hydrogen power supply device 50 via the hydrogen leakage monitoring module 824, and closes the hydrogen and compressed air inlet valves of the PEM hydrogen cell modules in the hydrogen power supply device 50 when a fixed value is exceeded. Preferably, the above constant value in the hydrogen leakage data is: the hydrogen content in the air was 0.5%. I.e. the safety threshold is 0.5%.
The following describes steps performed by the emergency power control system 100 of a nuclear power plant in some embodiments of the present invention in conjunction with fig. 1-7 and the emergency power control method of the nuclear power plant in some embodiments of the present invention. The nuclear power plant emergency power supply control method in some embodiments of the invention is used for providing an emergency power supply and providing different charging and power supply modes according to different working conditions. In the embodiment of the invention, the emergency power supply control method of the nuclear power plant comprises the steps S1-S3.
S1, judging whether the commercial power 200 is on, if so, executing the step S2, and if not, executing the step S3. Specifically, the dual power automatic transfer switch 70 selects the dc bus 10 or the utility power 200 to turn on the downstream load 300 according to whether the utility power 200 is turned off.
S2, switching on the commercial power 200 and the downstream load 300, starting a standby working condition, judging whether the capacity of the lithium battery power supply device 20 is lower than a capacity threshold, and if yes, outputting a standby charging signal; the solar power supply device 30 and the wind power supply device 40 charge the lithium battery power supply device 20 according to the standby charging signal. Specifically, when the utility power 200 is turned on, that is, when the utility power 200 is normally supplied, the dual power automatic transfer switch 70 turns on the utility power 200 and the downstream load 300; when the utility power 200 is turned off, that is, when the utility power 200 cannot normally supply power, the dual power automatic transfer switch 70 turns on the dc bus 10 and the downstream load 300.
Specifically, the backup charging module 811 determines whether the capacity of the lithium battery powered device 20 is below a capacity threshold, and selectively outputs a backup charging signal. If the capacity of the lithium battery power supply device 20 is lower than the capacity threshold, a standby charging signal is not output; if the capacity of the lithium battery powered device 20 is below the capacity threshold, a backup charge signal is output. Alternatively, the capacity threshold is 50% -70%. Preferably, the capacity threshold is 60%.
1-4, in some embodiments, step S2 further includes S21; judging whether the output power of the solar power supply device 30 and the wind power supply device 40 exceeds a power threshold value, and if so, outputting a cleaning charging signal; if not, outputting a mains supply charging signal; the solar power supply device 30 and the wind power supply device 40 charge the lithium battery power supply device 20 according to the cleaning charging signal; the utility power 200 charges the lithium battery power supply device 20 according to the utility power charging signal. Specifically, the cleaning power supply module 812 determines whether the output power of the solar power supply device 30 and the wind power supply device 40 exceeds a power threshold, and selectively outputs a cleaning charging signal or a mains charging signal.
S3, connecting the direct current bus 10 with the downstream load 300, starting an emergency working condition, judging whether the time for entering the emergency working condition is lower than a time threshold, and if yes, outputting a lithium battery power supply signal; if not, outputting an auxiliary energy power supply signal; the lithium battery power supply device 20 supplies power to the downstream load 300 according to the lithium battery power supply signal, and the solar power supply device 30, the wind power supply device 40, and the hydrogen power supply device 50 supply power to the downstream load 300 according to the auxiliary energy power supply signal. Specifically, the time determination module 821 determines whether the time to enter the emergency condition is below a time threshold, and selectively outputs a lithium battery power supply signal or an auxiliary energy power supply signal. In some embodiments, the time threshold is 5-10 minutes. Preferably, the time threshold is 5min. In some embodiments, the initial period of emergency is 0-5 minutes; the middle period of emergency is 5-10min; and the later period of emergency is 10min, and the emergency is ended.
As shown in connection with fig. 1-3, 5, in some embodiments, step S3 further includes step S31: judging whether the sum of the power of the solar power supply device 30, the wind power supply device 40 and the hydrogen power supply device 50 exceeds the power required by the downstream load 300, and if so, outputting an emergency charging signal; the solar power supply device 30, the wind power supply device 40, and the hydrogen power supply device 50 charge the lithium battery power supply device 20 according to the emergency charge signal. Specifically, the emergency charging module 822 determines whether the sum of the power of the solar power supply device 30, the wind power supply device 40, and the hydrogen power supply device 50 exceeds the power required by the downstream load 300, and selectively outputs an emergency charging signal. In some embodiments, if the load demand of the downstream load 300 is P1, the sum of the powers of the hydrogen power supply device 50, the solar power supply device 30, and the wind power supply device 40 is P2, and P2< P1, then the lithium battery power supply device 20 provides the power P1-P2.
As shown in connection with fig. 1-3, 6, in some embodiments, step S3 preferably further includes S32: and judging whether the charge state of the lithium battery power supply device 20 is lower than a charge state threshold value, and if so, outputting a lithium battery alarm signal. In some embodiments, the lithium battery protection module 823 determines whether the state of charge of the lithium battery powered device 20 is below a state of charge threshold and selectively outputs lithium battery alert signals. Alternatively, the state of charge threshold is 60% to 80%. Preferably, the state of charge threshold is 70%.
As shown in connection with fig. 1-3, 7, in some embodiments, step S3 further includes S33: and judging whether the hydrogen leakage data exceeds a safety threshold, and if so, outputting a hydrogen leakage alarm signal. In some embodiments, the hydrogen leak monitoring module 824 determines whether the hydrogen leak data exceeds a safety threshold and selectively outputs a hydrogen leak alert signal. Preferably, the safety threshold is 0.5%.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (10)
1. A nuclear power plant emergency power control system, comprising:
a DC bus (10);
the lithium battery power supply device (20) is connected with the direct current bus (10), and the lithium battery power supply device (20) is used for providing lithium battery power;
the solar power supply device (30) is connected with the direct current bus (10), and the solar power supply device (30) is used for providing solar power generation electric energy;
the wind energy power supply device (40) is connected with the direct current bus (10), and the wind energy power supply device (40) is used for providing wind energy to generate electric energy;
the hydrogen power supply device (50) is connected with the direct current bus (10), and the hydrogen power supply device (50) is used for providing hydrogen power generation electric energy;
a system working power supply (60) connected with the direct current bus (10), wherein the system working power supply (60) is used for providing system working electric energy;
the dual-power automatic transfer switch (70) is respectively connected with a commercial power (200), a downstream load (300) and the direct current bus (10), and the dual-power automatic transfer switch (70) is used for selectively connecting the commercial power (200) with the downstream load (300) or connecting the direct current bus (10) with the downstream load (300) according to the closing condition of the commercial power (200); and
an energy management device (80), the energy management device (80) comprising:
a standby condition control unit (81) for starting a standby condition when the dual-power automatic change-over switch (70) turns on the utility power (200) and the downstream load (300); the standby working condition control unit (81) comprises a standby charging module (811) for judging whether the capacity of the lithium battery power supply device (20) is lower than a capacity threshold value and selectively outputting a standby charging signal; the solar power supply device (30) and the wind power supply device (40) are also used for charging the lithium battery power supply device (20) according to the standby charging signal;
an emergency working condition control unit (82) for starting an emergency working condition when the dual-power automatic change-over switch (70) is connected with the direct current bus (10) and the downstream load (300); the emergency working condition control unit (82) comprises a time judging module (821) for judging whether the time for entering the emergency working condition is lower than a time threshold value and selectively outputting a lithium battery power supply signal or an auxiliary energy power supply signal; the lithium battery power supply device (20) is further used for supplying power to the downstream load (300) according to the lithium battery power supply signal, and the solar power supply device (30), the wind power supply device (40) and the hydrogen power supply device (50) are further used for supplying power to the downstream load (300) according to the auxiliary energy power supply signal.
2. The nuclear power plant emergency power supply control system according to claim 1, wherein the emergency condition control unit (82) further includes an emergency charging module (822) for determining whether a sum of power of the solar power supply device (30), the wind power supply device (40), and the hydrogen power supply device (50) exceeds a power required by the downstream load (300), and selectively outputting an emergency charging signal; the solar power supply device (30), the wind power supply device (40) and the hydrogen power supply device (50) are further used for charging the lithium battery power supply device (20) according to the emergency charging signal.
3. The nuclear power plant emergency power supply control system according to claim 1, wherein the standby condition control unit (81) further comprises a clean power supply module (812) for determining whether the output power of the solar power supply device (30) and the wind power supply device (40) exceeds a power threshold value, and selectively outputting a clean charging signal or a mains charging signal; the solar power supply device (30) and the wind power supply device (40) are also used for charging the lithium battery power supply device (20) according to the cleaning charging signal; the mains (200) is also used for charging the lithium battery powered device (20) according to the mains charging signal.
4. A nuclear plant emergency power supply control system according to any one of claims 1-3, wherein the emergency condition control unit (82) further comprises a lithium battery protection module (823) for determining whether the state of charge of the lithium battery powered device (20) is below a state of charge threshold, and selectively outputting a lithium battery alarm signal.
5. A nuclear power plant emergency power supply control system according to any one of claims 1 to 3, wherein the emergency condition control unit (82) further includes a hydrogen leakage monitoring module (824) for determining whether the hydrogen leakage data exceeds a safety threshold and selectively outputting a hydrogen leakage alarm signal.
6. A method of controlling an emergency power supply for a nuclear power plant, characterized by performing the following steps with the emergency power supply control system (100) for a nuclear power plant according to any one of claims 1-5:
s1, judging whether the commercial power (200) is on, if so, executing a step S2, and if not, executing a step S3;
s2, switching on the commercial power (200) and the downstream load (300), starting a standby working condition, judging whether the capacity of the lithium battery power supply device (20) is lower than a capacity threshold value, and if yes, outputting a standby charging signal; the solar power supply device (30) and the wind power supply device (40) charge the lithium battery power supply device (20) according to the standby charging signal;
s3, connecting a direct current bus (10) with the downstream load (300), starting an emergency working condition, judging whether the time for entering the emergency working condition is lower than a time threshold, and if yes, outputting a lithium battery power supply signal; if not, outputting an auxiliary energy power supply signal; the lithium battery power supply device (20) supplies power to the downstream load (300) according to the lithium battery power supply signal, and the solar power supply device (30), the wind power supply device (40) and the hydrogen power supply device (50) supply power to the downstream load (300) according to the auxiliary energy power supply signal.
7. The method for controlling an emergency power supply of a nuclear power plant according to claim 6, wherein the step S3 further includes a step S31: judging whether the sum of the power of the solar power supply device (30), the wind power supply device (40) and the hydrogen power supply device (50) exceeds the power required by the downstream load (300), and if so, outputting an emergency charging signal; the solar power supply device (30), the wind power supply device (40) and the hydrogen power supply device (50) charge the lithium battery power supply device (20) according to the emergency charging signal.
8. The method according to claim 6, wherein the step S2 further includes S21; judging whether the output power of the solar power supply device (30) and the wind power supply device (40) exceeds a power threshold value, and if so, outputting a cleaning charging signal; if not, outputting a mains supply charging signal; the solar power supply device (30) and the wind power supply device (40) charge the lithium battery power supply device (20) according to the cleaning charging signal; the utility power (200) charges the lithium battery power supply device (20) according to the utility power charging signal.
9. The emergency power supply control method according to any one of claims 6 to 8, wherein step S3 further includes S32: and judging whether the state of charge of the lithium battery power supply device (20) is lower than a state of charge threshold, and if so, outputting a lithium battery alarm signal.
10. The emergency power supply control method according to any one of claims 6 to 8, wherein step S3 further includes S33: and judging whether the hydrogen leakage data exceeds a safety threshold, and if so, outputting a hydrogen leakage alarm signal.
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| WO2017184822A1 (en) * | 2016-04-20 | 2017-10-26 | Concept By Us Corporation | A photovoltaic sourced power station with integrated battery charge/discharge cycle |
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| CN106618405A (en) * | 2016-12-16 | 2017-05-10 | 广西科技大学鹿山学院 | Glass cleaner with double power sources and control method thereof |
| CN112530617A (en) * | 2020-11-10 | 2021-03-19 | 中广核工程有限公司 | Primary loop cooling method and device under power loss working condition of whole plant |
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