Building weak current system based on hydrogen fuel cell and regulation and control method

Abstract

The invention discloses a building weak current system based on hydrogen fuel cells and a regulation and control method. The system comprises hydrogen fuel cell monomer modules, power utilization modules with different voltage grades based on the hydrogen fuel cell monomer modules and a standby power supply, the power utilization modules comprise single-voltage power utilization modules and multi-voltage power utilization modules, and the multiple single-voltage power utilization modules, the multiple multi-voltage power utilization modules with different voltage grades and the standby power supply form a series loop; when the power supply of the power utilization module cannot meet the load of the corresponding weak current equipment, comparing the priorities of the weak current equipment in the power utilization module, and supplying power to the high-priority weak current equipment through the power supplies of other low-priority power utilization modules; and if the power supplies of other low-priority power utilization modules still cannot meet the load of the high-priority weak current equipment, the standby power supply is used for supplying power. According to the invention, the power utilization modules are controlled through the switch to realize the recombination of the modules, so that the power utilization voltage of weak current equipment requiring power utilization is matched, and the flexible allocation of each power in the system is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel cell power grids and relates to a building weak current system based on hydrogen fuel cells and a control method. Background Art

[0002] In recent years, the imbalance between electricity supply and demand for air conditioning and heating in buildings has become increasingly severe. The conflict between the volatility of renewable energy generation and the stable power supply requirements of traditional users has intensified, further impacting the current imbalance in electricity supply and demand. Hydrogen fuel cells, with their high efficiency and zero emissions, have become a key area of ​​energy transformation. Distributed applications allow hydrogen fuel cells to be flexibly deployed in cities, communities, industrial parks, and other scenarios, providing a stable and reliable power supply while reducing dependence on traditional power grids. Furthermore, hydrogen fuel cells can be combined with renewable energy to produce hydrogen from surplus electricity, achieving efficient energy storage and utilization, and promoting the decarbonization and intelligent development of energy systems.

[0003] With the development of smart buildings, the power consumption of weak current systems has been increasing year by year. In recent years, the power consumption of weak current systems in buildings has been increasing year by year, primarily driven by the rapid development of intelligent and digital technologies. With the widespread application of the Internet of Things, smart security, building automation systems, and data centers in buildings, the scale and complexity of weak current systems have increased significantly. For example, the widespread use of smart lighting, video surveillance, access control systems, network communication equipment, and servers has led to a growing share of weak current system energy consumption. Furthermore, the promotion of 5G technology and the deployment of edge computing have further increased power demand. Statistics show that the proportion of weak current systems in total building energy consumption has increased from less than 10% to over 20%, with this contribution being particularly pronounced in commercial buildings and high-density office environments. This trend poses new challenges to building energy efficiency management, necessitating the urgent need to achieve energy conservation and consumption reduction in weak current systems through optimized system design, the adoption of high-efficiency equipment, and the introduction of intelligent energy consumption monitoring technologies.

[0004] As the proportion of electricity consumed by weak current systems on the building side increases, the demand for stable operation of low-voltage distribution systems in buildings is also increasing. Existing methods for regulating power systems include: Patent No. CN114448079A connects two power supplies in parallel with the load to ensure that the load has additional power supply when the power fails; and Chinese patent CN115811038A uses a method of connecting multiple loads and multiple power supplies in parallel to achieve stable power supply for high-priority loads through priority determination; in addition, patent No. CN119765607A equips the load with a switchable dual power supply system, thereby improving the power continuity of the load when switching power sources.

[0005] In summary, existing methods achieve stable power supply when a power failure occurs, thereby ensuring stable operation of the load; however, most existing methods target the power stability problem of a single load, and are relatively limited in the linkage between multiple load power supplies and cannot guarantee stable power supply to all loads. Summary of the Invention

[0006] In order to solve the problems existing in the prior art such as the limitation of linkage between multiple load power supplies and the inability to provide stable power supply to all loads, the present invention provides a building weak current system and control method based on hydrogen fuel cells; the system includes a hydrogen fuel cell single module, a power module with different voltage levels based on the hydrogen fuel cell single module and a backup power supply; the power module includes a single-voltage power module and a multi-voltage power module, and multiple single-voltage power modules, multiple different voltage levels and multi-voltage power modules and a backup power supply form a series circuit; when the power supply of the power module cannot meet the load of the corresponding weak current equipment, the priority of the weak current equipment in the power module is compared, and the power supply of other low-priority power modules is used to supply power to the high-priority weak current equipment; if the power supply of other low-priority power modules still cannot meet the load of the high-priority weak current equipment, the power is supplied by the backup power supply. The present invention controls the power module by switches to achieve the recombination of the modules, thereby matching the power voltage of the weak current equipment with demand, and realizing the flexible allocation of various power in the system.

[0007] The present invention adopts the following technical solutions. On the one hand, the present invention provides a building weak current system based on hydrogen fuel cells, including a hydrogen fuel cell single module, power modules of different voltage levels based on the hydrogen fuel cell single module, and a backup power supply; The power modules include single-voltage power modules and multi-voltage power modules. Multiple single-voltage power modules, multiple multi-voltage power modules with different voltage levels, and a backup power supply form a series circuit. Each hydrogen fuel cell single module includes a hydrogen fuel cell, a power switch, a connecting switch and a module parallel switch; wherein the hydrogen fuel cell, the power switch and the connecting switch are connected in series, and the module parallel switch is arranged in parallel at both ends of the hydrogen fuel cell and the power switch; The single-voltage power module includes weak current equipment, equipment branch switches, and module parallel switches with a rated voltage corresponding to the hydrogen fuel cell; the weak current equipment and the equipment branch switch are connected in series and then connected in parallel to the hydrogen fuel cell and the power switch; the module parallel switch is connected in parallel to the branches connected in series with the hydrogen fuel cell, the power switch, and the connecting switch; The multi-voltage power module of a predetermined voltage level includes multiple hydrogen fuel cell single modules, weak current equipment of a predetermined voltage level, equipment branch switches and module parallel switches; multiple hydrogen fuel cell single modules form a power series branch through their respective connecting switches, and the module parallel switches are connected in parallel at both ends of the power series branch; after the weak current equipment and the equipment branch switch are connected in series, one end is connected between the power switch and the connecting switch of the hydrogen fuel cell single module at the head end of the power series branch, and the other end is connected to the end of the power series branch.

[0008] Preferably, each power-consuming module is divided into different load levels according to the power-consuming priority of the weak-current equipment. The higher the power-consuming priority, the higher the load level corresponding to the power-consuming module.

[0009] Preferably, when the weak current equipment in each power module is put into operation and the power supply in the power module can meet the load requirements of the weak current equipment: The connection switch L of the hydrogen fuel cell single module at the head end of each power-consuming module is disconnected, the module parallel switch is disconnected, and the module parallel switch is disconnected; the other connection switches L of the single modules except the hydrogen fuel cell single module at the head end are closed, the power switch is closed, and the module parallel switch is disconnected; the equipment branch switch is closed.

[0010] Preferably, when the power supply in the power module does not meet the load requirements of the weak current equipment, the power supplies of other power modules supply power to the weak current equipment: In the power-consuming modules, the module parallel switches and the equipment branch switches are disconnected, and all the connection switches are closed; the module parallel switches of the hydrogen fuel cell modules corresponding to the number of weak current equipment load requirements are disconnected, and the power switches are closed; the module parallel switches of the remaining hydrogen fuel cell modules are closed, and the power switches are disconnected; In the power supply module of the weak-current equipment being powered, the equipment branch switch and the connection switch of the head-end hydrogen fuel cell single module are closed, and all other switches are disconnected.

[0011] Another aspect of the present invention provides a method for controlling a building weak current system based on a hydrogen fuel cell, comprising the following steps: Step 1: Set the power priority of the power modules according to the load level of the weak current equipment; Step 2: Based on the operating status of the weak current equipment, by comparing the power supply voltage of the weak current equipment and the power voltage of the equipment, the power modules corresponding to the weak current equipment are divided into adjustable modules, power demand modules and temporarily unavailable modules, and the total adjustable voltage is determined; Step 3: Based on the priority and required voltage of the weak current equipment in the power demand module and the total adjustable voltage, the power supply of the adjustable module is regulated; Step 4: When the total adjustable voltage cannot meet the required voltage, the power supply of the temporarily unavailable module is regulated based on the power supply voltage of the temporarily unavailable module and the priority of the weak current device.

[0012] Preferably, step 2 includes: When the weak current equipment is in normal operation, the power module is temporarily unavailable for allocation, that is, the power module does not participate in the power allocation of the adjustable power source; When the operating state of the weak current device is not operating, the power supply voltage of the power consumption module corresponding to the weak current device is compared with the power consumption voltage of the device; when the power supply voltage of the power consumption device is lower than the power consumption voltage of the device, the power consumption module becomes the power demand module; When the power supply voltage is not lower than the power voltage of the equipment, the power module is considered an adjustable module; the power supply voltage values ​​of all adjustable modules are added together to obtain the total adjustable voltage; Based on the voltage level of the power-consuming module, the power priority of the weak-current equipment in the module, and the power detection time, the weak-current equipment of the power-demand module and the power-consuming module that cannot temporarily allocate power are numbered.

[0013] Preferably, the process of numbering weak current equipment includes: Priority numbering is performed based on the power usage priority of the weak-current equipment in the power-consuming module; voltage numbering of the weak-current equipment is obtained based on the power supply voltage of the power-consuming module; weak-current equipment with the same priority number is sorted in order of power usage detection time to obtain detection time numbering; weak-current equipment number is obtained based on priority numbering, voltage numbering and detection time numbering.

[0014] Preferably, step 3 includes: Based on the weak current equipment number of the power demand module, set the control order of the weak current equipment in the power demand module; Compare the required voltage of the weak current equipment under the current control order with the total adjustable voltage, adjust the power supply of the adjustable module, and update the total adjustable voltage.

[0015] Preferably, the process of setting the control sequence of weak current equipment includes: Sequential regulation is performed based on the priority number of the weak-current equipment in the power demand module, with the priority number being the regulation order. When the priority numbers are the same, the weak-current equipment is sorted in ascending order according to the voltage number. The smaller the voltage number, the earlier the weak-current equipment is regulated. When the priority number and the voltage number are the same, regulation is performed in ascending order according to the detection time number.

[0016] Preferably, the process of regulating the power supply of the adjustable module and updating the total adjustable voltage includes: When the total adjustable voltage is not less than the required voltage of the weak-current equipment, the number of hydrogen fuel cell single modules of the adjustable power supply participating in the power supply is calculated based on the equipment power voltage of the powered equipment; the corresponding number of hydrogen fuel cell single modules in the adjustable module supply power to the weak-current equipment, and the total adjustable voltage is updated.

[0017] Preferably, step 4 includes: When the total adjustable voltage is not greater than the required voltage of the weak current equipment in the power demand module, determine whether the total adjustable voltage is equal to zero; if the total adjustable voltage is not zero, all the remaining total adjustable voltage is used for power regulation, that is, the remaining total adjustable voltage is all used to supply power to the equipment requiring power; update the required voltage of the equipment; if the total adjustable power voltage is equal to zero, set the regulation order of the temporarily unavailable modules based on the weak current equipment number of the temporarily unavailable modules; Compare the priorities of the power demand module and the weak current equipment in the currently unavailable modules, and regulate the power supply of the currently unavailable modules.

[0018] Preferably, the process of regulating the power supply of the temporarily unavailable module includes: If the priority of the temporarily unavailable module is not lower than that of the power demand module, no adjustment will be made to the temporarily unavailable module in the current round, that is, it will not participate in the current round of power dispatch; If the priority of the temporarily unavailable module is lower than that of the power demand module, the power supply of the temporarily unavailable module supplies power to the weak current equipment of the power demand module; and the low priority voltage is updated based on the power supply voltage of the corresponding temporarily unavailable module. When the aggregated low-priority voltage is not less than the demand voltage, the priority comparison is stopped, and the number of hydrogen fuel cell single modules in the temporarily unavailable module participating in the power supply is calculated; the corresponding number of hydrogen fuel cell single modules in the temporarily unavailable module supply power to the weak-current equipment, and the remaining low-priority voltage is updated; the remaining low-priority voltage is used to supply power to the weak-current equipment in the next power demand module.

[0019] Compared with the prior art, the beneficial effects of the present invention include at least: 1. When the power supply of the hydrogen fuel module matched with the weak current equipment is insufficient, the system can deploy the deployable modules of the idle weak current equipment and the temporarily non-deployable modules with lower priority, and realize the recombination of the modules through switch control to match the power voltage of the weak current equipment in demand, thereby realizing flexible deployment of various power in the system.

[0020] 2. The switch design of each module in the system of the present invention can ensure the normal operation of modules not involved in power allocation without affecting the power allocation process of other modules.

[0021] 3. The hydrogen fuel cell single module designed in the present invention can solve the problem of unstable voltage of hydrogen fuel cells when changing fuels or long power interruptions affecting the normal operation of key weak-current equipment, and can reduce the problem of energy loss of backup power over time caused by using backup power to ensure power stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of a 12V hydrogen fuel cell monomer module provided by the present invention; Figure 2 This is a schematic diagram of a building weak current system based on a hydrogen fuel cell provided by the present invention; Figure 3 This is a flow chart of the classification of weak current equipment provided by the invention; Figure 4 It is a flow chart of the building weak current system control method provided by the invention. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] To facilitate power allocation, a modular design is being implemented for hydrogen fuel cell power supplies used in weak current equipment. According to Section 3.7 of the national standard GB / T 156-2017, "Standard Voltage," the rated voltage of equipment below 120V AC or 1500V DC is generally a multiple of 6. The design of the power-consuming equipment in this scheme is based on multiples of 12V, which complies with the standard. Furthermore, according to the scheme's operational logic, when the equipment requires power, the power supply switch is disconnected. The standard indicates that the equipment's power supply voltage is a multiple of 12 and is therefore divisible by 12. Specific implementation can also be designed in smaller units, for example, by splitting a 12V power supply into smaller modules using the same design methods as for power supplies within a 24V or 36V module. Furthermore, the generated voltage of a single hydrogen fuel cell is much less than 12V, making this splitting approach feasible.

[0025] Example 1 This embodiment discloses a building weak current system based on hydrogen fuel cells, see Figure 1 and Figure 2 The building's weak current system includes hydrogen fuel cell modules, power modules with different voltage levels based on the hydrogen fuel cell modules, and backup power supplies. The power modules include single-voltage power modules and multi-voltage power modules. Multiple single-voltage power modules, multiple multi-voltage power modules with different voltage levels, and a backup power supply form a series circuit. Each hydrogen fuel cell module includes a 12V hydrogen fuel cell, a power switch D, a connecting switch L, and a module parallel switch K. The hydrogen fuel cell, the power switch D, and the connecting switch L are connected in series, and the module parallel switch K is connected in parallel across the hydrogen fuel cell and the power switch D. Single voltage power module includes 12V weak current equipment, equipment branch switch S d And the module parallel switch T d ; Switch 12V weak current equipment and equipment branch switch S d After the series connection, the hydrogen fuel cell and the power switch D are connected in parallel. d At both ends, connect the modules in parallel with switch T d Connect in parallel to the hydrogen fuel cell and power switch D d , connect switch L d Both ends of the series branch; The multi-voltage power module of the predetermined voltage level includes multiple hydrogen fuel cell monomer modules, weak current equipment of the predetermined voltage level, and equipment branch switch S m And the module parallel switch T m ; Multiple hydrogen fuel cell modules form a power supply series branch through their respective connection switches, and the module parallel switch T m Connect in parallel at both ends of the power supply series branch; weak current equipment and equipment branch switch S m One end of the series connection is connected to the power switch D of the hydrogen fuel cell single module at the first end of the power series branch. m1 and connect switch L m1 The other end is connected to the end of the power supply series branch; The backup power supply includes a branch power switch B1 and a loop series switch B2; the loop series switch is in the series circuit between the power module and the backup power supply. The branch power switch B1 is connected in series with the external backup power supply and then connected in parallel to both ends of the loop series switch B2.

[0026] In this embodiment, the single-voltage power module is a 12V power module; the multi-voltage power modules of predetermined voltage levels include 24V power modules, 36V power modules, and 48V power modules. An external city grid power electronic converter switch and protection device is used in conjunction with other renewable energy sources such as solar and wind power as an external backup power source.

[0027] According to the power priority of the weak current equipment, each power module is divided into different load levels. The higher the power priority, the higher the load level corresponding to the power module.

[0028] In this embodiment, the power usage priority includes the first level power usage priority, the second level power usage priority and the third level power usage priority, the first level priority is higher than the second level, and the second level priority is higher than the third level; if the weak current equipment of the power usage module is the first level power usage priority, the corresponding power usage module is the first level power usage priority module; if the weak current equipment of the power usage module is the second level power usage priority, the corresponding power usage module is the second level power usage priority module; if the weak current equipment of the power usage module is the third level power usage priority, the corresponding power usage module is the third level power usage priority module.

[0029] When the weak current equipment in each power module is put into operation and the power supply in the power module can meet the load requirements of the weak current equipment: The equipment branch switch of each power-consuming module is closed, and the module parallel switch is disconnected; the connection switch of the first-end hydrogen fuel cell single module is disconnected, and the module parallel switch is disconnected; the other connection switches of the single modules except the first-end hydrogen fuel cell single module are closed, the power switch is closed, and the module parallel switch is disconnected.

[0030] In this embodiment, the device branch switch in each power module is used to control whether the device uses electricity, and the switch is closed by default; the module parallel switch controls whether the external current passes through the power module, and the module parallel switch is disconnected by default; the power switch is used to control whether the hydrogen fuel cell single module is connected to the circuit, and the power switch is closed by default. The module parallel switch in the multi-voltage power module of different voltage levels controls whether the hydrogen fuel cell single module in the power module transmits current to the outside, and the module parallel switch is disconnected by default; the connection switch can be connected to other hydrogen fuel cell single modules, so that the hydrogen fuel cell single modules are connected in series to form a power module higher than 12V to supply power to weak current equipment higher than 12V; the connection switch of the head-end hydrogen fuel cell single module is disconnected by default, and the connection switches except the head-end hydrogen fuel cell single module are closed by default; the connection switch of the single-voltage power module is disconnected by default. For the single-voltage power module, its module parallel switch has a similar function to the module parallel switch, so in order to simplify Figure 2 Delete the module parallel switches of all single-voltage power modules.

[0031] When the power supply in the power consumption module does not meet the load requirements of the weak-current equipment, the power supply of other power consumption modules supplies power to the weak-current equipment: In the power-consuming modules, the module parallel switches and the equipment branch switches are disconnected, and all the connection switches are closed; the module parallel switches of the hydrogen fuel cell modules corresponding to the number of weak current equipment load requirements are disconnected, and the power switches are closed; the module parallel switches of the remaining hydrogen fuel cell modules are closed, and the power switches are disconnected; In the power supply module of the weak-current equipment being powered, the equipment branch switch and the connection switch of the head-end hydrogen fuel cell single module are closed, and all other switches are disconnected.

[0032] For example, when a 48V power module supplies power to a weak-current device with a 36V power module: Module parallel switch T for 48V power module m And equipment branch switch S m Disconnect; module parallel switch K m1 , K m2 , K m3 Disconnect, K m4 Close; connect switch L m1 、L m2 、L m3 and L m4 Close; power switch D m1 、D m2 、D m3 Closed, D m4 disconnect; Module parallel switch T for 36V power module m Disconnect, equipment branch switch S m Close; connect switch L m1 Closed, L m2 , L m3 Disconnect; module parallel switch K m1 , K m2 , K m3 Disconnect; power switch D m1 、D m2 、D m3 disconnect.

[0033] When the power supply in the power consumption module does not meet the load requirements of the weak-current equipment and the power supplies of other power consumption modules cannot supply power, the backup power supply supplies power to the weak-current equipment: The branch power switch B1 of the backup power supply is closed, and the loop series switch B2 is opened; In the power supply module of the weak-current equipment being powered, the equipment branch switch and the connection switch of the head-end hydrogen fuel cell single module are closed, and all other switches are disconnected.

[0034] For example, when the backup power supply supplies power to the weak current equipment of the single voltage power supply module, the branch power switch B1 of the backup power supply is closed and the loop series switch B2 is disconnected; the equipment branch switch S d Closed, module parallel switch T d Disconnect; connect switch L d Close, power switch D d disconnect.

[0035] Example 2 This embodiment discloses a method for controlling a building weak current system based on a hydrogen fuel cell, comprising the following steps: Step 1: Set the corresponding power priority according to the load level of the weak current equipment.

[0036] Specifically, the loads of electrical equipment in office buildings are divided into levels, including primary load, secondary load and tertiary load. Among them, primary load refers to key equipment that has a continuous power supply demand for the operation of the building's weak current system, usually including automatic fire alarm, emergency lighting, communication and security monitoring equipment. Such loads need to be equipped with dual power supplies or emergency power supply devices with automatic switching. Secondary load refers to equipment that needs to restore power in a short time to maintain normal functions in the event of a power outage, such as main lighting in the office area, important office equipment, elevators and information processing equipment. Backup power supply is required to ensure continuity. Tertiary load refers to conventional equipment that allows short-term power outages after power outages, such as general lighting, electric fans, etc. Prioritize power consumption for electrical equipment based on their load level. Equipment corresponding to level 1 loads receives first priority, equipment corresponding to level 2 loads receives second priority, and equipment corresponding to level 3 loads receives third priority. For example, emergency control equipment (24V) and network communication equipment (48V) are level 1 loads and can be set to first priority to ensure their power supply stability.

[0037] Step 2: Based on the operating status of the weak current equipment, by comparing the power supply voltage of the weak current equipment and the equipment power voltage, the power modules corresponding to the weak current equipment are divided into adjustable modules, power demand modules and temporarily unavailable modules, and the total adjustable voltage is determined.

[0038] See Figure 3 When the weak current equipment is in normal operation, the power module is temporarily unavailable for allocation, that is, the power module does not participate in the power allocation of the adjustable power source; When the operating state of the weak current equipment is not in operation, the power supply voltage of the power-consuming module is compared with the power voltage of the equipment equipped with the power-consuming module; when the power supply voltage of the power-consuming equipment is lower than the required voltage of the equipment, the power-consuming module is a power-demand module, that is, a module that requires external power supply, and the power switch of the power-consuming module is disconnected and the connection switch is closed; When the power supply voltage of the weak current equipment is not lower than the power voltage of the equipment, the power module is an adjustable module. To ensure the normal transmission of power to the external weak current equipment, the equipment branch switch and power switch of the power module are disconnected, and the connection switch and module parallel switch are closed; the power supply voltage values ​​of all adjustable modules are added together to obtain the total adjustable voltage ; Sort by the order of power consumption detection time to obtain the number of the deployable module; for example, Indicates that the power supply voltage of the corresponding adjustable module is 24V and the power detection time is earlier than that of other adjustable modules; For power demand modules and temporarily unavailable modules, priority numbers are assigned based on the power priority of the weak-current equipment in the power module; the voltage number of the weak-current equipment is obtained based on the power supply voltage in the power module; the weak-current equipment with the same priority number is sorted in the order of power detection time to obtain the detection sequence number; the weak-current equipment number is obtained based on the priority number, voltage number and detection time number; Specifically, the priority number of the first-priority device for the power module is 1; the priority number of the second-priority device for the power module is 2; the priority number of the third-priority device for the power module is 3; the voltage number of the power module is the power supply voltage value of the power module; for example, for the weak current device that cannot be deployed for the time being, the first-priority 48V device at the first power detection time is numbered The corresponding number of the second priority 24V device in the second power detection time is ; For the weak current equipment of the power demand module, the first level 48V weak current equipment is numbered ; The second secondary power supply 24V weak current equipment, numbered ; Among them, the first subscript represents the priority number, the second subscript is the voltage number, and the third subscript is the detection time number.

[0039] In this embodiment, when the adjustable power supply is insufficient, the priority of the temporarily unavailable module and the weak current equipment in the demand power supply module is compared to determine whether the power supply of the temporarily unavailable module participates in the power allocation. If it participates in the power allocation, the device branch switch and the power switch are disconnected, and the connection switch and the module parallel switch are closed.

[0040] Step 3: Based on the priority and required voltage of the weak current equipment in the power demand module and the total adjustable voltage, the power supply of the adjustable module is regulated.

[0041] See Figure 4 , step 3 includes: Based on the weak current device number of the power demand module, set the control order of the weak current devices in the power demand module; the specific process is as follows: Output the priority numbers of the weak-current devices in the power demand module in order, with the priority numbers from small to large being the control order. When the priority numbers are the same, the weak-current devices are sorted from small to large by voltage number. The smaller the voltage number, the higher the control order of the weak-current device. When the priority number and voltage number are the same, control is carried out in order from small to large by detection time number. In this embodiment, low-voltage devices among power-consuming devices with the same priority are given priority in electricity use because low-voltage devices have less electricity demand than high-voltage devices. With limited adjustable power supply, more low-voltage devices can be satisfied with their electricity needs. Devices with the same level and voltage that issue electricity demands earlier are given priority in electricity use.

[0042] Compare the required voltage of the weak current equipment under the current control order with the total adjustable voltage, adjust the power supply of the adjustable module, and update the total adjustable voltage. The specific process is as follows: When the total adjustable voltage is not less than the required voltage of the equipment, , according to the power voltage of the equipment being powered, calculate the number of hydrogen fuel cell modules that can be deployed to power the equipment ; P 可调配 The module parallel switch, module parallel switch and equipment branch switch of each hydrogen fuel cell single module are disconnected, and the connecting switch and power switch are closed; if the adjustable module participating in the power supply is a multi-voltage power module, the module parallel switch T m And equipment branch switch S m Disconnect, connect switch L m Close, module parallel switch K m Disconnect and close the power switches D of the corresponding modules in ascending order according to the numbers. m , thereby adjusting the single modules participating in the power supply to correspond to the required voltage; updating the current total adjustable voltage, that is, .

[0043] Determine whether power supply allocation has been performed on the weak-current devices in all power demand modules. If not, perform power supply allocation on the weak-current devices in the next power demand module; if so, end power supply allocation.

[0044] Step 4: When the total adjustable voltage cannot meet the required voltage, the power supply of the temporarily unavailable module is regulated based on the power supply voltage of the temporarily unavailable module and the priority of the weak current device.

[0045] When the total adjustable voltage is not greater than the required voltage of the weak current equipment in the power demand module, determine whether the total adjustable voltage is equal to zero; if the total adjustable voltage is not zero, all the remaining total adjustable voltage is used for power regulation, that is, the remaining total adjustable voltage is all used to supply power to the equipment that needs power; update the required voltage of the equipment, that is, ; If the total available power supply voltage is zero, the control order of the temporarily unavailable modules is set based on their weak current device numbers. The specific process is as follows: The weak current devices in the temporarily unavailable modules are output in sequence according to their priority numbers, with the output order from largest to smallest. When the priority numbers are the same, they are sorted from largest to smallest by voltage number, with the modules with higher voltage being output first. When the priority number and voltage number are the same, they are output in sequence from largest to smallest by detection time number.

[0046] Furthermore, the priority of the power demand module is compared with the priority of the weak current equipment in the currently unavailable modules. The specific process includes: First, compare the priority numbers. If the priority numbers are different, the power module corresponding to the weak-current device with a smaller priority number has a higher priority. If the priority numbers are the same, compare the voltage numbers. The power module corresponding to the weak-current device with a smaller voltage number has a higher priority. If the priority number and voltage number are the same, the power module corresponding to the weak-current device with a smaller detection time number has a higher priority.

[0047] If the priority of the temporarily unavailable module is not lower than that of the power demand module, no adjustment will be made to the temporarily unavailable module in the current round, that is, it will not participate in the current round of power dispatch; If the priority of the temporarily unavailable module is lower than that of the power demand module, the power supply of the temporarily unavailable module supplies power to the weak current equipment of the power demand module; based on the power supply voltage of the corresponding temporarily unavailable module, the low priority voltage is updated and summarized, that is, ;in, Indicates the low priority voltage summarized in the current round, Indicates the low priority voltage summarized in the previous round; Indicates the power supply voltage of the modules that are temporarily unavailable for power allocation in the current round; Indicates the remaining low-priority voltage after powering the weak-current devices of the previous power demand module.

[0048] When the low-priority voltage summarized in the current round is lower than the demand voltage, the summarized low-priority voltage cannot meet the power requirements of the weak-current equipment in the power demand module. It is determined whether all temporarily unavailable modules have been compared with the power demand module. If not, compare the temporarily unavailable modules in the next round to update the summarized low-priority voltage. If so, connect to the city power grid or backup power supply to meet the power requirements of the weak-current equipment in the power demand module.

[0049] When the aggregated low priority voltage is not less than the required voltage, the priority comparison is stopped and the number of hydrogen fuel cell modules in the temporarily unavailable modules participating in the power supply is calculated, that is, ;disconnect P 比较The module parallel switch, module parallel switch and equipment branch switch of each hydrogen fuel cell single module are disconnected, and the connecting switch and power switch are closed; if the temporarily unavailable module participating in the power supply is a multi-voltage power module, the module parallel switch T m And equipment branch switch S m Disconnect, connect switch L m Close, module parallel switch K m Disconnect and close the power switches D of the corresponding modules in ascending order according to the numbers. m , thereby adjusting the single modules involved in power supply to correspond to the required voltage.

[0050] Update the remaining low priority voltages, i.e. ; Supply the remaining low-priority voltage to the weak-current equipment in the next power demand module; Determine whether power supply allocation has been performed on the weak-current devices in all power demand modules. If not, perform power supply allocation on the weak-current devices in the next power demand module; if so, end power supply allocation.

[0051] The present disclosure may be a system, method and / or computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A building weak current system based on a hydrogen fuel cell, comprising a hydrogen fuel cell single module, power modules of different voltage levels based on the hydrogen fuel cell single module, and a backup power supply; characterized by: The power consumption module includes a single-voltage power consumption module and a multi-voltage power consumption module. Multiple single-voltage power consumption modules, multiple multi-voltage power consumption modules with different voltage levels and a backup power supply form a series circuit; each hydrogen fuel cell single module includes a hydrogen fuel cell, a power switch, a connecting switch and a module parallel switch; wherein, the hydrogen fuel cell, the power switch and the connecting switch are connected in series, and the module parallel switch is arranged in parallel at both ends of the hydrogen fuel cell and the power switch; the single-voltage power consumption module includes a weak current device with a rated voltage corresponding to the hydrogen fuel cell, a device branch switch and a module parallel switch; the weak current device and the device branch switch are connected in series and then connected in parallel to the hydrogen fuel cell. The module parallel switch is connected in parallel at both ends of the branch in which the hydrogen fuel cell, the power switch and the connecting switch are connected in series; the multi-voltage power module of the predetermined voltage level includes multiple hydrogen fuel cell single modules, weak current equipment of the predetermined voltage level, equipment branch switch and module parallel switch; multiple hydrogen fuel cell single modules form a power series branch through their respective connecting switches, and the module parallel switch is connected in parallel at both ends of the power series branch; after the weak current equipment and the equipment branch switch are connected in series, one end is connected between the power switch and the connecting switch of the hydrogen fuel cell single module at the head end of the power series branch, and the other end is connected to the end of the power series branch.

2. The building weak current system based on hydrogen fuel cells according to claim 1 is characterized by: According to the power priority of the weak current equipment, each power module is divided into different load levels. The higher the power priority, the higher the load level corresponding to the power module.

3. The building weak current system based on hydrogen fuel cells according to claim 2 is characterized in that: When the weak current equipment in each power module is put into operation and the power supply in the power module can meet the load requirements of the weak current equipment: The connection switch L of the hydrogen fuel cell single module at the head end of each power-consuming module is disconnected, the module parallel switch is disconnected, and the module parallel switch is disconnected; the other connection switches L of the single modules except the hydrogen fuel cell single module at the head end are closed, the power switch is closed, and the module parallel switch is disconnected; the equipment branch switch is closed.

4. The building weak current system based on hydrogen fuel cells according to claim 3 is characterized by: When the power supply in the power consumption module does not meet the load requirements of the weak-current equipment, the power supply of other power consumption modules supplies power to the weak-current equipment: In the power-consuming modules, the module parallel switches and equipment branch switches are disconnected, and all connection switches are closed; the module parallel switches of the hydrogen fuel cell modules corresponding to the number of weak current equipment load requirements are disconnected, and the power switches are closed; The module parallel switches of the remaining hydrogen fuel cell single modules are closed, and the power switches are disconnected; In the power supply module of the weak-current equipment being powered, the equipment branch switch and the connection switch of the head-end hydrogen fuel cell single module are closed, and all other switches are disconnected.

5. A method for controlling a building weak current system based on a hydrogen fuel cell, using the system according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Set the power priority of the power modules according to the load level of the weak current equipment; Step 2: Based on the operating status of the weak current equipment, by comparing the power supply voltage of the weak current equipment and the power voltage of the equipment, the power modules corresponding to the weak current equipment are divided into adjustable modules, power demand modules and temporarily unavailable modules, and the total adjustable voltage is determined; Step 3: Based on the priority and required voltage of the weak current equipment in the power demand module and the total adjustable voltage, the power supply of the adjustable module is regulated; Step 4: When the total adjustable voltage cannot meet the required voltage, the power supply of the temporarily unavailable module is regulated based on the power supply voltage of the temporarily unavailable module and the priority of the weak current device.

6. The method for controlling a building weak current system based on a hydrogen fuel cell according to claim 5, characterized in that: Step 2 includes: When the weak current equipment is in normal operation, the power module is temporarily unavailable for allocation, that is, the power module does not participate in the power allocation of the adjustable power source; When the operating state of the weak current device is not operating, the power supply voltage of the power consumption module corresponding to the weak current device is compared with the power consumption voltage of the device; when the power supply voltage of the power consumption device is lower than the power consumption voltage of the device, the power consumption module becomes the power demand module; When the power supply voltage is not lower than the power voltage of the equipment, the power module is considered an adjustable module; the power supply voltage values ​​of all adjustable modules are added together to obtain the total adjustable voltage; Based on the voltage level of the power-consuming module, the power priority of the weak-current equipment in the module, and the power detection time, the weak-current equipment of the power-demand module and the power-consuming module that cannot temporarily allocate power are numbered.

7. The method for controlling a building weak current system based on a hydrogen fuel cell according to claim 6, characterized in that: The process of numbering weak current equipment includes: Priority numbering is performed based on the power usage priority of the weak-current equipment in the power-consuming module; voltage numbering of the weak-current equipment is obtained based on the power supply voltage of the power-consuming module; weak-current equipment with the same priority number is sorted in order of power usage detection time to obtain detection time numbering; weak-current equipment number is obtained based on priority numbering, voltage numbering and detection time numbering.

8. The method for controlling a building weak current system based on a hydrogen fuel cell according to claim 5, characterized in that: Step 3 includes: Based on the weak current equipment number of the power demand module, set the control order of the weak current equipment in the power demand module; Compare the required voltage of the weak current equipment under the current control order with the total adjustable voltage, adjust the power supply of the adjustable module, and update the total adjustable voltage.

9. The method for controlling a building weak current system based on a hydrogen fuel cell according to claim 8, characterized in that: The process of setting the control sequence of weak current devices includes: Sequential regulation is performed based on the priority number of the weak-current equipment in the power demand module, with the priority number being the regulation order. When the priority numbers are the same, the weak-current equipment is sorted in ascending order according to the voltage number. The smaller the voltage number, the earlier the weak-current equipment is regulated. When the priority number and the voltage number are the same, regulation is performed in ascending order according to the detection time number.

10. The method for controlling a building weak current system based on a hydrogen fuel cell according to claim 8, characterized in that: The process of regulating the power supply of the adjustable module and updating the total adjustable voltage includes: When the total adjustable voltage is not less than the required voltage of the weak-current equipment, the number of hydrogen fuel cell single modules of the adjustable power supply participating in the power supply is calculated based on the equipment power voltage of the powered equipment; the corresponding number of hydrogen fuel cell single modules in the adjustable module supply power to the weak-current equipment, and the total adjustable voltage is updated.

11. The method for controlling a building weak current system based on a hydrogen fuel cell according to claim 5, characterized in that: Step 4 includes: When the total adjustable voltage is not greater than the required voltage of the weak current equipment in the power demand module, determine whether the total adjustable voltage is equal to zero; if the total adjustable voltage is not zero, all the remaining total adjustable voltage is used for power regulation, that is, the remaining total adjustable voltage is all used to supply power to the equipment requiring power; update the required voltage of the equipment; if the total adjustable power voltage is equal to zero, set the regulation order of the temporarily unavailable modules based on the weak current equipment number of the temporarily unavailable modules; Compare the priorities of the power demand module and the weak current equipment in the currently unavailable modules, and regulate the power supply of the currently unavailable modules.

12. The method for controlling a building weak current system based on a hydrogen fuel cell according to claim 11, characterized in that: The process of regulating the power supply of a temporarily unavailable module includes: If the priority of the temporarily unavailable module is not lower than that of the power demand module, no adjustment will be made to the temporarily unavailable module in the current round, that is, it will not participate in the current round of power dispatch; If the priority of the temporarily unavailable module is lower than that of the power demand module, the power supply of the temporarily unavailable module supplies power to the weak current equipment of the power demand module; and the low priority voltage is updated based on the power supply voltage of the corresponding temporarily unavailable module. When the aggregated low-priority voltage is not less than the demand voltage, the priority comparison is stopped, and the number of hydrogen fuel cell single modules in the temporarily unavailable module participating in the power supply is calculated; the corresponding number of hydrogen fuel cell single modules in the temporarily unavailable module supply power to the weak-current equipment, and the remaining low-priority voltage is updated; the remaining low-priority voltage is used to supply power to the weak-current equipment in the next power demand module.

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