Circuit grading guarantee system

Abstract

The utility model relates to a circuit grading guarantee system, which belongs to the technical field of circuit control and comprises a power supply module, a primary power-off load controller, a secondary power-off load controller, a first load and a second load. The power supply module comprises a photovoltaic power supply module and an energy storage battery power supply module; the primary power-off load controller is respectively connected with the output end of the power supply module and the input end of the first load and is used for controlling the power-off of the first load; and the secondary power-off load controller is respectively connected with the output end of the power supply module and the input end of the second load and is used for controlling the power-off of the second load. According to the utility model, the primary power-off load controller and the secondary power-off load controller are arranged in the photovoltaic energy storage system, so that graded power-off can be realized, the operation backup time of the load is prolonged, and the photovoltaic energy storage system is ensured not to be over-discharged.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit control, and particularly relates to a circuit hierarchical protection system. Background Art

[0002] With the progress of technology and the decline of cost, photovoltaic energy storage technology has been widely promoted and applied globally. Although we have more heard about large-scale photovoltaic power generation plants and industrial-level energy storage systems traditionally, in low-power DC power supply equipment, photovoltaic energy storage technology also has important value and application prospects. Such as mobile communication base stations, monitoring equipment, meteorological stations, environmental sensors, field scientific research equipment, etc. These devices may need to operate in remote areas or temporary work sites. When the on-site power grid power supply condition is poor, the photovoltaic energy storage system in the low-power DC power supply equipment can be used independently to provide reliable energy support and avoid relying on traditional fuel generators or long-distance power grid power supply; when the on-site power grid power supply condition is available, the photovoltaic energy storage system can be used as an auxiliary system. On the one hand, it uses clean energy for power supply, saving energy and reducing emissions; on the other hand, it relies on energy storage to continuously supply power after the mains power failure, reducing the probability of equipment outage and also buying a large amount of repair time for maintenance personnel. However, this low-power DC power supply equipment cannot well meet the different power supply requirements of different loads when in use. Content of the Utility Model

[0003] In view of this, it is necessary to provide a circuit hierarchical protection system to solve the problem that the low-power DC power supply equipment cannot well meet the different power supply requirements of different loads when in use.

[0004] To solve the above problems, the utility model provides a circuit hierarchical protection system, including: a power supply module, a primary power-off load controller, a secondary power-off load controller, a first load, and a second load; the power supply module includes a photovoltaic power supply module and a storage battery power supply module;

[0005] The primary power-off load controller is respectively connected to the output end of the power supply module and the input end of the first load, and is used to control the power-off of the first load;

[0006] The secondary power-off load controller is respectively connected to the output end of the power supply module and the input end of the second load, and is used to control the power-off of the second load.

[0007] Optionally, the photovoltaic power supply module, the storage battery power supply module, the primary power-off load controller, and the secondary power-off load controller are arranged in a portable power supply device.

[0008] Optionally, the power supply module further includes a mains power supply module, and the mains power supply module is connected to the portable power supply device.

[0009] Optionally, the portable power supply device further includes an AC-DC conversion module;

[0010] The input end of the AC-DC conversion module is connected to the output end of the mains power supply module;

[0011] The output end of the AC-DC conversion module is respectively connected to the input ends of the first load and the second load.

[0012] Optionally, the primary power-down load controller includes a first DC high-low voltage protection board and a first circuit breaker;

[0013] The output end of the power supply module is connected to the input end of the first DC high-low voltage protection board;

[0014] The output end of the first DC high-low voltage protection board is connected to the first circuit breaker;

[0015] The first circuit breaker is arranged on the connection circuit between the power supply module and the first load.

[0016] Optionally, the secondary power-down load controller includes a second DC high-low voltage protection board and a second circuit breaker;

[0017] The output end of the power supply module is connected to the input end of the second DC high-low voltage protection board;

[0018] The output end of the second DC high-low voltage protection board is connected to the second circuit breaker;

[0019] The second circuit breaker is arranged on the connection circuit between the power supply module and the second load.

[0020] Optionally, the second load is the target sector antenna of the base station; the first load is other sector antennas of the base station except the target sector antenna; the number of users in the coverage area of the target sector antenna is greater than the number of users in the coverage area of the other sector antennas.

[0021] Optionally, the system further includes a contactor;

[0022] The output end of the power supply module is connected to the input ends of the plurality of contactors; the output ends of the plurality of contactors are respectively connected to the first load and the second load.

[0023] Optionally, the output end of the photovoltaic power supply module is further connected to the input end of the energy storage battery power supply module.

[0024] Optionally, the output end of the mains power supply module is further connected to the input end of the energy storage battery power supply module.

[0025] The beneficial effects of the present utility model are as follows: The circuit hierarchical protection system of the present utility model includes: a power supply module, a primary power-down load controller, a secondary power-down load controller, a first load, and a second load; the power supply module includes a photovoltaic power supply module and a storage battery power supply module; the primary power-down load controller is respectively connected to the output end of the power supply module and the input end of the first load for controlling the power-down of the first load; the secondary power-down load controller is respectively connected to the output end of the power supply module and the input end of the second load for controlling the power-down of the second load. By setting a primary power-down load controller and a secondary power-down load controller in a power supply system (photovoltaic energy storage system) containing a photovoltaic power supply module and a storage battery power supply module, the present utility model can achieve hierarchical power-down of loads by a low-power DC power supply device (containing a photovoltaic energy storage system). When the power is sufficient, all loads are powered; when the power is not so sufficient, primary power-down is performed to extend the operation backup time of important loads connected to the low-power DC power supply device; when the power further decreases, secondary power-down is performed to ensure that the photovoltaic energy storage power supply system in the low-power DC power supply device will not be over-discharged. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of an embodiment of the circuit hierarchical protection system provided by the present utility model. Detailed Embodiment

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present utility model.

[0028] In the description of the embodiments of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships, for example: A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone.

[0029] The descriptions such as "first" and "second" involved in the embodiments of the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Therefore, the technical features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0030] Reference to "embodiment" in this document means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present utility model. The phrase appears in various positions in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0031] Glossary:

[0032] Low-power DC power supply equipment: refers to equipment with relatively low output power that mainly provides power for DC loads.

[0033] Photovoltaic energy storage system for low-power DC power supply equipment: is a system specifically designed to supply power for low-power DC equipment (such as LED lights, small electronic devices, etc.). This system usually includes components such as photovoltaic panels, energy storage batteries, and charge controllers.

[0034] Referring to Figure 1 , a schematic structural diagram of an embodiment of the circuit hierarchical protection system provided by the present utility model is shown. The system includes:

[0035] A power supply module 10, a primary power-down load controller 20, a secondary power-down load controller 30, a first load 40, and a second load 50; the power supply module 10 includes a photovoltaic power supply module 101 and an energy storage battery power supply module 102;

[0036] The primary power-down load controller 20 is respectively connected to the output end of the power supply module 10 and the input end of the first load 40, and is used to control the power-down of the first load 40;

[0037] The secondary power-down load controller 30 is respectively connected to the output end of the power supply module 10 and the input end of the second load 50, and is used to control the power-down of the second load 50.

[0038] The power supply module 10 includes a photovoltaic power supply module 101 and an energy storage battery power supply module 102. The photovoltaic power supply module 101 and the energy storage battery power supply module 102 can cooperate to supply power to the first load 40 and the second load 50.

[0039] The photovoltaic power supply module 101 may include a photovoltaic panel 1011 and a photovoltaic adapter 1012. The photovoltaic panel 1011 is used to convert solar energy into electrical energy, and the photovoltaic adapter 1012 is used to output the electrical energy.

[0040] The energy storage battery power supply module 102 may include rechargeable lithium batteries, such as lithium-ion batteries, lithium polymer batteries, lithium iron phosphate batteries, ternary lithium batteries, lithium titanate batteries, lithium cobalt oxide batteries, lithium manganese oxide batteries, hybrid lithium batteries, etc.

[0041] When the light is sufficient and the power generation of the photovoltaic power supply module 101 can meet the operation of all loads, the system supplies power to the first load 40 and the second load 50 at the same time, and the surplus power generated by the photovoltaic power supply module 101 charges the energy storage battery power supply module 102 as a backup power source; when the light is insufficient and the power generation of the photovoltaic power supply module 101 cannot meet the operation of all loads at the same time, the system can perform a primary power-down to cut off the power supply of the first load 40 and only supply power to the second load 50. The surplus power generated by the photovoltaic power supply module 101 charges the energy storage battery power supply module 102 as a backup power source to ensure the stable operation of the second load 50 and guarantee the backup operation time at the same time.

[0042] The primary power-down load controller 20 is arranged on the connection circuit between the power supply module 10 and the first load 40 and is used to control the power-down of the first load 40. The secondary power-down load controller 30 is arranged on the connection circuit between the power supply module 10 and the second load 50 and is used to control the power-down of the second load 50. The first load 40 can be a secondary load, and the second load 50 can be an important load. The primary power-down load controller 20 can detect the output voltage of the power supply module 10. When the output voltage of the power supply module 10 drops to the first voltage threshold, for example, when the first voltage threshold is 52.8V (SOC = 90%), the secondary load is powered down. The secondary power-down load controller 30 can also detect the output voltage of the power supply module 10. When the output voltage of the power supply module 10 drops to the second voltage threshold, for example, when the second voltage threshold is 48V (SOC = 5%), the important load is powered down. Then the primary power-down can extend the backup operation time of the important load, and the secondary power-down can ensure that the power supply module 10 will not be over-discharged.

[0043] Moreover, when the output voltage of the power supply module 10 rises to the second voltage threshold of 48V (SOC = 5%), the important load can be powered on; when the output voltage of the power supply module 10 rises to the first voltage threshold of 48V (SOC = 5%), the secondary load can be powered on.

[0044] The circuit hierarchical protection system of the present utility model includes: a power supply module 10, a primary power-down load controller 20, a secondary power-down load controller 30, a first load 40, and a second load 50; the power supply module 10 includes a photovoltaic power supply module 101 and a storage battery power supply module 102; the output end of the power supply module 10 is connected to the input end of the first load 40; the primary power-down load controller 20 is respectively connected to the output end of the power supply module 10 and the input end of the first load 40 for controlling the power-down of the first load 40; the secondary power-down load controller 30 is respectively connected to the output end of the power supply module 10 and the input end of the second load 50 for controlling the power-down of the second load 50. By setting the primary power-down load controller 20 and the secondary power-down load controller 30 in the power supply system (photovoltaic energy storage system) containing the photovoltaic power supply module 101 and the storage battery power supply module 102, the present utility model can achieve hierarchical power-down of the load by the low-power DC power supply device (containing the photovoltaic energy storage system). When the power is sufficient, all loads are powered; when the power is not so sufficient, primary power-down is performed to extend the operation backup time of the important load connected to the low-power DC power supply device; when the power further decreases, secondary power-down is performed to ensure that the photovoltaic energy storage power supply system in the low-power DC power supply device will not be over-discharged.

[0045] In one embodiment, the photovoltaic power supply module 101, the storage battery power supply module 102, the primary power-down load controller 20, and the secondary power-down load controller 30 are arranged in a portable power supply device. The portable power supply device can be a low-power DC power supply device.

[0046] In this embodiment, the portable power supply device can supply power to the load more intelligently. For example, when the light is sufficient, it can supply power to all loads by itself; when the light is insufficient and the electric energy of the storage battery power supply module 102 is also insufficient, it will perform primary power-down and secondary power-down by itself to ensure the backup operation time of the important load and that the power supply module 10 will not be over-discharged.

[0047] In one embodiment, the power supply module 10 further includes a mains power supply module 103, and the mains power supply module 103 is connected to the portable power supply device. In this embodiment, the photovoltaic power supply module 101, the storage battery power supply module 102, and the mains power supply module 103 can cooperate to supply power to the first load 40 and the second load 50, and cooperate to control the power-down of the first load 40 and the power-down of the second load 50.

[0048] When the mains power supply module 103 is normal, the system supplies power to all loads. When supplying power, it preferentially uses the electric energy generated by the photovoltaic power supply module 101 to supply power and charges the energy storage battery power supply module 102. When the power generation of the photovoltaic power supply module 101 is insufficient, it is supplemented by the mains power supply module 103. For example, if the rated voltage of the DC load is 54V, the output voltage of the photovoltaic adapter 1012 can be set to a constant voltage of 56.0V, and the output voltage of the AC-DC conversion module 60 is set to a constant voltage of 54.4V. Therefore, when the photovoltaic power supply module 101 and the mains power supply module 103 supply power simultaneously, the photovoltaic power supply module 101 is given priority.

[0049] When the mains power is cut off, the above-mentioned embodiment of the coordinated power supply of the photovoltaic power supply module 101 and the energy storage battery power supply module 102 is referred to.

[0050] When the photovoltaic power supply module 101 is unable to generate electricity or the mains power supply module 103 is powered off and the power supply needs to be completely provided by the energy storage battery power supply module 102, if the energy storage battery power supply module 102 has sufficient power, the system supplies power to both the main load and the secondary load simultaneously; when the battery power decreases to the set primary power-down value, the system performs a primary power-down, cutting off the power supply to the secondary load and only supplying power to the important load. When the battery power decreases to the battery minimum protection value, the system performs a secondary power-down, which not only increases the operating time of the important load but also protects the energy storage battery power supply module 102.

[0051] In one embodiment, the portable power supply device further includes an AC-DC conversion module 60; the input end of the AC-DC conversion module 60 is connected to the output end of the mains power supply module 103; the output end of the AC-DC conversion module 60 is respectively connected to the input ends of the first load 40 and the second load 50.

[0052] The AC-DC conversion module 60 is an electronic device used to convert the alternating current (AC) input by the mains power supply module 103 into direct current (DC) and stably output the voltage to ensure that the output voltage is within the set range.

[0053] The AC-DC conversion module 60 is respectively connected to the first load 40 and the second load 50. A primary power-down load controller 20 is provided on the connection circuit between the AC-DC conversion module 60 and the first load 40; a secondary power-down load controller 30 is provided on the connection circuit between the AC-DC conversion module 60 and the second load 50.

[0054] In one embodiment, the primary power-down load controller 20 includes a first DC high-low voltage protection board 201 and a first circuit breaker 202; the output end of the power supply module 10 is connected to the input end of the first DC high-low voltage protection board 201; the output end of the first DC high-low voltage protection board 201 is connected to the first circuit breaker 202; the first circuit breaker 202 is provided on the connection circuit between the power supply module 10 and the first load 40.

[0055] The DC high and low voltage protection board is an important device for protecting the DC power supply system, mainly used for monitoring and controlling the DC voltage to prevent damage to the system caused by excessive or too low voltage.

[0056] The first DC high and low voltage protection board 201 can be used to detect the output voltage of the power module 10. When the output voltage of the power module 10 drops to the first voltage threshold, the first circuit breaker 202 is controlled to open, thereby realizing the power-off of the first load 40.

[0057] In one embodiment, the secondary power-off load controller 30 includes a second DC high and low voltage protection board 301 and a second circuit breaker 302; the output end of the power module 10 is connected to the input end of the second DC high and low voltage protection board 301; the output end of the second DC high and low voltage protection board 301 is connected to the second circuit breaker 302; the second circuit breaker 302 is arranged on the connection circuit between the power module 10 and the second load 50.

[0058] The second DC high and low voltage protection board 301 can be used to detect the output voltage of the power module 10. When the output voltage of the power module 10 drops to the second voltage threshold, the second circuit breaker 302 is controlled to open, thereby realizing the power-off of the second load 50.

[0059] In one embodiment, the second load 50 is the target sector antenna of the base station; the first load 40 is the other sector antennas of the base station except the target sector antenna; the number of users in the coverage area of the target sector antenna is greater than the number of users in the coverage area of the other sector antennas.

[0060] In one embodiment, the circuit hierarchical protection system further includes contactors; the output end of the power module 10 is connected to the input ends of multiple contactors; the output ends of the multiple contactors are respectively connected to the first load 40 and the second load 50. The load can be connected to the power module 10 through the contactor, and then the removal and input of the load are controlled by the load controller.

[0061] In one embodiment, the output end of the photovoltaic power supply module 101 is further connected to the input end of the energy storage battery power supply module 102 to charge the energy storage battery power supply module 102 through the photovoltaic power supply module 101.

[0062] In one embodiment, the output end of the mains power supply module 103 is further connected to the input end of the energy storage battery power supply module 102 to charge the energy storage battery power supply module 102 through the mains power supply module 103.

[0063] The photovoltaic energy storage system for low-power DC loads can supply power independently or assist the mains power supply. When the photovoltaic energy storage system supplies power independently, if the system load increases or in rainy weather, the power generation of the photovoltaic panel 1011 cannot fully meet the power supply requirements of all loads, or the power generation of the photovoltaic panel 1011 becomes smaller, and insufficient battery charging will lead to insufficient backup operation time for the load.

[0064] When the photovoltaic energy storage system operates as a mains auxiliary system, when the battery fails or ages, resulting in a decrease in the electricity storage capacity, the backup operation time of the load will also decrease. And these environmental or load change factors are very common, thus resulting in a significant reduction in the effectiveness of the photovoltaic energy storage system in low-power DC power supply equipment.

[0065] The circuit hierarchical protection system provided by the present utility model can excellently enhance the ability of the photovoltaic energy storage system in low-power DC power supply equipment to respond to emergencies, and ensure the stable operation of the photovoltaic energy storage system and the load.

[0066] The circuit hierarchical protection system provided by the present utility model mainly ensures the normal operation of the load and ensures that important loads have sufficient backup operation time in the event of a power outage of the mains by means of hierarchical power-off control of the output circuit.

[0067] The output end of the circuit hierarchical protection system provided by the present utility model is different from that of a conventional photovoltaic energy storage system, which can only control the power supply of the load by the opening and closing of a switch. It can sense the power generation power of the photovoltaic panel 1011 and the battery capacity of the storage battery, and through corresponding configuration strategies, realize the on-off of each load switch, and realize the intelligent management of the load power supply, so as to better ensure and adapt to the power supply and backup requirements.

[0068] The above is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A circuit hierarchical guarantee system, characterized in that, Comprising: A power supply module, a primary power-down load controller, a secondary power-down load controller, a first load, and a second load; the power supply module includes a photovoltaic power supply module and a storage battery power supply module; The primary power-down load controller is respectively connected to the output end of the power supply module and the input end of the first load, and is used to control the power-down of the first load; The secondary power-down load controller is respectively connected to the output end of the power supply module and the input end of the second load, and is used to control the power-down of the second load.

2. The circuit hierarchical protection system according to claim 1, wherein The photovoltaic power supply module, the storage battery power supply module, the primary power-down load controller, and the secondary power-down load controller are arranged in a portable power supply device.

3. The circuit hierarchical protection system according to claim 2, wherein The power supply module further includes a mains power supply module, and the mains power supply module is connected to the portable power supply device.

4. The circuit hierarchical protection system according to claim 3, wherein The portable power supply device further includes an AC-DC conversion module; The input end of the AC-DC conversion module is connected to the output end of the mains power supply module; The output end of the AC-DC conversion module is respectively connected to the input ends of the first load and the second load.

5. The circuit hierarchical protection system according to claim 1, characterized in that, The primary power-down load controller includes a first DC high-low voltage protection board and a first circuit breaker; The output end of the power supply module is connected to the input end of the first DC high-low voltage protection board; The output end of the first DC high-low voltage protection board is connected to the first circuit breaker; The first circuit breaker is arranged on the connection circuit between the power supply module and the first load.

6. The circuit hierarchical protection system according to claim 1, wherein, The secondary power-down load controller includes a second DC high-low voltage protection board and a second circuit breaker; The output end of the power supply module is connected to the input end of the second DC high-low voltage protection board; The output end of the second DC high-low voltage protection board is connected to the second circuit breaker; The second circuit breaker is arranged on the connection circuit between the power supply module and the second load.

7. The circuit hierarchical protection system according to claim 1, characterized in that, The second load is a base station target sector antenna; the first load is other sector antennas of the base station except the target sector antenna; the number of users in the coverage area of the target sector antenna is greater than the number of users in the coverage area of the other sector antennas.

8. The circuit hierarchical protection system according to claim 1, characterized in that, The system further includes a plurality of contactors; The output end of the power supply module is connected to the input ends of the plurality of contactors; the output ends of the plurality of contactors are respectively connected to the first load and the second load.

9. The circuit hierarchical protection system according to claim 3, wherein The output end of the photovoltaic power supply module is further connected to the input end of the storage battery power supply module.

10. The circuit hierarchical protection system according to claim 3, wherein The output end of the mains power supply module is further connected to the input end of the storage battery power supply module.

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