Multi-loop energy storage street lamp system and control method thereof

Abstract

The invention discloses a multi-loop energy storage street lamp system and a control method thereof, and relates to the field of street lamp power supply, and the multi-loop energy storage street lamp system is characterized in that one end of an LED power supply module is connected with a commercial power end, and the other end of the LED power supply module is connected with an LED module; the commercial power end, the LED power supply module and the LED module form a first loop; one end of the battery charging module is connected with a mains supply end, and the other end of the battery charging module is connected with the energy storage battery; one end of the battery discharge module is connected with the energy storage battery, and the other end of the battery discharge module is connected with the LED module; the mains supply end, the battery charging module, the energy storage battery, the battery discharging module and the LED module form a second loop; the MCU control module is connected with the LED power supply module, the battery charging module and the battery discharging module. The reliability of power supply of the energy storage street lamp can be ensured, and failure of a power supply loop caused by node faults is avoided.

Description

Technical Field

[0001] This application relates to the technical field of street lamp power supply, and particularly to a multi-loop energy storage street lamp system and its control method. Background Art

[0002] Street lamps are widely used in urban roads and blocks to provide night lighting for pedestrians and vehicles, increasing the safety and visibility of the roads. As an important urban infrastructure, street lamps not only meet the need for night lighting in terms of function, but also have many characteristics in terms of design and technology.

[0003] With the development of the times, people pay more and more attention to energy conservation and environmental protection, and the design and use of street lamps are gradually developing in the direction of energy conservation and environmental protection. On the one hand, more and more street lamps begin to use LED bulbs because LED bulbs have the characteristics of low energy consumption, long life and low radiation, which can effectively reduce energy consumption and environmental pollution. On the other hand, energy storage street lamps have gradually appeared in people's sight. Energy storage street lamps usually use wind power generation, photovoltaic power generation or mechanical power generation to store energy. Compared with thermal power generation, using natural power generation to store energy is more environmentally friendly and more conducive to sustainable development.

[0004] However, existing energy storage street lamps mostly adopt an independent design of the power generation device and the controller, and the energy storage battery is connected between the power generation device and the controller. This single-loop series power supply method is relatively simple. Once any node in this loop fails, the entire energy storage street lamp will not be able to work properly, and the reliability of the energy storage street lamp power supply will be significantly reduced. Summary of the Invention

[0005] The purpose of this application is to provide a multi-loop energy storage street lamp system and its control method, which can ensure the reliability of the energy storage street lamp power supply and avoid the failure of the power supply loop caused by node failures.

[0006] To achieve the above purpose, this application provides the following solutions:

[0007] In a first aspect, this application provides a multi-loop energy storage street lamp system, and the multi-loop energy storage street lamp system includes: an LED module, an LED power supply module, a battery charging module, a battery discharging module, an energy storage battery and an MCU control module;

[0008] One end of the LED power supply module is connected to the mains end, and the other end of the LED power supply module is connected to the LED module; the mains end, the LED power supply module and the LED module form a first loop;

[0009] One end of the battery charging module is connected to the mains power supply end, and the other end of the battery charging module is connected to the energy storage battery; one end of the battery discharging module is connected to the energy storage battery, and the other end of the battery discharging module is connected to the LED module; the mains power supply end, the battery charging module, the energy storage battery, the battery discharging module and the LED module form a second loop;

[0010] The MCU control module is respectively connected to the LED power supply module, the battery charging module and the battery discharging module; the MCU control module is configured to:

[0011] Obtain the detection signal and detection time of the multi-loop energy storage street lamp system;

[0012] Judge whether there is a fault in the first loop and the second loop according to the detection signal;

[0013] When there is a fault in the first loop and the detection time is within the set time range, control the second loop to supply power to the LED module;

[0014] When there is a fault in the second loop and the detection time is within the set time range, control the first loop to supply power to the LED module;

[0015] When there are faults in both the first loop and the second loop and the detection time is within the set time range, control the energy storage battery to supply power to the LED module.

[0016] In a second aspect, the present application further provides a control method for a multi-loop energy storage street lamp system. The control method for the multi-loop energy storage street lamp system is applied to the multi-loop energy storage street lamp system described in the first aspect. The control method for the multi-loop energy storage street lamp system includes:

[0017] Obtain the detection signal and detection time of the multi-loop energy storage street lamp system;

[0018] Judge whether there is a fault in the first loop and the second loop according to the detection signal;

[0019] When there is a fault in the first loop and the detection time is within the set time range, control the second loop to supply power to the LED module;

[0020] When there is a fault in the second loop and the detection time is within the set time range, control the first loop to supply power to the LED module;

[0021] When there are faults in both the first loop and the second loop and the detection time is within the set time range, control the energy storage battery to supply power to the LED module.

[0022] According to the specific embodiments provided in the present application, the following technical effects are disclosed in the present application:

[0023] The energy storage street lamp system of the present application is composed of multiple circuits in parallel. It can not only realize the direct power supply of the LED module from the mains side, but also realize the indirect power supply of the LED module by the energy storage battery. Different power supply circuits provide multiple power supply options for the LED module. At the same time, when a certain circuit fails, another circuit can be used to continue power supply, thus ensuring the reliability of the power supply of the energy storage street lamp system. In addition, the design of multiple circuits can also provide a more energy-saving and environmentally friendly power consumption method, achieving the effect of "peak shaving and valley filling" in power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is the internal structure relationship diagram of the multi-circuit energy storage street lamp system provided by the embodiment of the present application;

[0026] Figure 2 It is the control method flow chart of the multi-circuit energy storage street lamp system provided by the embodiment of the present application.

[0027] Symbol Description:

[0028] LED module - 1, LED power supply module - 2, battery charging module - 3, battery discharging module - 4, energy storage battery - 5, MCU control module - 6. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0030] The purpose of the present application is to provide a multi-circuit energy storage street lamp system and its control method, which can ensure the reliability of the power supply of the energy storage street lamp and avoid the failure of the power supply circuit due to node failure.

[0031] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0032] Embodiment 1

[0033] This embodiment provides a multi-loop energy storage street lamp system, as Figure 1 shown. The multi-loop energy storage street lamp system includes: an LED module 1, an LED power supply module 2, a battery charging module 3, a battery discharging module 4, an energy storage battery 5, and an MCU control module 6.

[0034] Specifically, one end of the LED power supply module 2 is connected to the mains power end, and the other end of the LED power supply module 2 is connected to the LED module 1; the mains power end, the LED power supply module 2, and the LED module 1 form a first loop.

[0035] One end of the battery charging module 3 is connected to the mains power end, and the other end of the battery charging module 3 is connected to the energy storage battery 5; one end of the battery discharging module 4 is connected to the energy storage battery 5, and the other end of the battery discharging module 4 is connected to the LED module 1; the mains power end, the battery charging module 3, the energy storage battery 5, the battery discharging module 4, and the LED module 1 form a second loop.

[0036] The MCU control module 6 is respectively connected to the LED power supply module 2, the battery charging module 3, and the battery discharging module 4; the MCU control module 6 is used for:

[0037] Obtaining the detection signal and detection time of the multi-loop energy storage street lamp system;

[0038] Judging whether there are faults in the first loop and the second loop according to the detection signal;

[0039] When there is a fault in the first loop and the detection time is within the set time range, controlling the second loop to supply power to the LED module 1;

[0040] When there is a fault in the second loop and the detection time is within the set time range, controlling the first loop to supply power to the LED module 1;

[0041] When there are faults in both the first loop and the second loop and the detection time is within the set time range, controlling the energy storage battery 5 to supply power to the LED module 1.

[0042] Furthermore, the multi-loop energy storage street lamp system has four working modes, namely the direct power supply mode of the LED module, the energy storage battery charging and discharging mode, the energy storage battery single charging mode, and the energy storage battery single discharging mode.

[0043] Furthermore, the direct power supply mode of the LED module is realized through the first loop; the energy storage battery charging and discharging mode, the energy storage battery single charging mode, and the energy storage battery single discharging mode are all realized through the second loop.

[0044] Further, the battery discharge module 4 includes: a three-port autotransformer inductor, a freewheeling diode, a power feeding diode, and a switching transistor; the three-port autotransformer inductor includes a first winding and a second winding connected in series.

[0045] Wherein, the three-port autotransformer inductor has a center tap; one end of the center tap is connected to the common end of the first winding and the second winding; the other end of the center tap is respectively connected to the positive electrode of the power feeding diode and the first end of the switching transistor; the first end of the three-port autotransformer inductor is connected to the energy storage battery 5; the second end of the three-port autotransformer inductor is connected to the positive electrode of the freewheeling diode; the negative electrode of the freewheeling diode is respectively connected to the negative electrode of the power feeding diode and the LED module 1; the second end of the switching transistor is grounded; the third end of the switching transistor is connected to the MCU control module 6; the MCU control module 6 is further configured to control the on-time and off-time of the switching transistor by changing the duty cycle of the PWM signal.

[0046] As a preferred embodiment, the switching transistor is an insulated gate field effect transistor; the drain of the switching transistor is respectively connected to the other end of the center tap and the positive electrode of the power feeding diode; the source of the switching transistor is grounded; the gate of the switching transistor is connected to the MCU control module 6.

[0047] As a preferred embodiment, the multi-loop energy storage street lamp system can be externally connected to a module with detection and / or control functions, such as: RF module, camera module, radar detection module, water immersion detection module, tilt detection module, etc., to integrate the sensing and communication functions required for smart street lamps. In addition, the multi-loop energy storage street lamp system also has an emergency lighting function. When a disaster occurs (such as water immersion, power failure of the commercial power) is detected through the detection function module, the LED module 1 can be powered by the energy storage battery 5 to achieve automatic emergency lighting, or the emergency lighting function can be manually turned on.

[0048] Embodiment 2

[0049] This embodiment provides a control method for a multi-loop energy storage street lamp system, as Figure 2 shown, the control method of the multi-loop energy storage street lamp system is applied to the multi-loop energy storage street lamp system described in Embodiment 1, and the control method of the multi-loop energy storage street lamp system includes:

[0050] Step S1: Obtain the detection signal and detection time of the multi-loop energy storage street lamp system.

[0051] Step S2: Determine whether there is a fault in the first loop and the second loop according to the detection signal.

[0052] In this embodiment, the above detection signal includes a first loop detection signal and a second loop detection signal, and step S2 specifically includes:

[0053] When the first loop detection signal is abnormal, it is determined that there is a fault in the first loop.

[0054] When the second loop detection signal is abnormal, it is determined that there is a fault in the second loop.

[0055] When the first loop detection signal and the second loop detection signal are both abnormal, it is determined that there are faults in both the first loop and the second loop.

[0056] Step S3: When there is a fault in the first loop and the detection time is within the set time range, control the second loop to supply power to the LED module 1.

[0057] Step S4: When there is a fault in the second loop and the detection time is within the set time range, control the first loop to supply power to the LED module 1.

[0058] Step S5: When there are faults in both the first loop and the second loop and the detection time is within the set time range, control the energy storage battery 5 to supply power to the LED module 1.

[0059] In one example, the set time range refers to the time when the multi-loop energy storage street lamp system works normally, and is generally set from 18:00 to 6:00 the next day.

[0060] Furthermore, the control method of the above multi-loop energy storage street lamp system further includes:

[0061] Determine the power supply period of the current power grid according to the detection time.

[0062] When the detection time is within the set time range and the current power grid power supply period is in the peak period, control the battery discharge module 4 to work, so that the energy storage battery 5 discharges to the LED module 1.

[0063] When the detection time is within the set time range and the current power grid power supply period is in the low valley period, control the battery charging module 3 and the battery discharge module 4 to work, so that the energy storage battery 5 charges while discharging to the LED module 1.

[0064] In one example, the peak period of the user's electricity consumption is the peak stage, and the peak stage is generally set from 8:00 to 22:00; the non-peak period of electricity consumption is the low valley stage, and the low valley stage is generally set from 22:00 to 8:00 the next day.

[0065] Even further, the control method of the above multi-loop energy storage street lamp system further includes:

[0066] Determine the usage duration of the multi-loop energy storage street lamp system.

[0067] When the usage duration reaches the set time value, repair the first loop and the second loop, and replace the energy storage battery 5.

[0068] In one example, the set time value is 1 year.

[0069] In summary, the present application has the following advantages:

[0070] (1) It is powered by two independently parallel circuits, each with an independent design, to achieve fault decoupling / isolation, improving the reliability of the energy storage street lamp system. Even if one of the circuits fails, the LED module can still work normally, ensuring traffic safety.

[0071] (2) The independent battery charging module and battery discharging module design can achieve simultaneous charging and discharging of the energy storage battery.

[0072] (3) A DC-DC converter with a center tap (i.e., the battery discharging module) is adopted, which greatly improves the boost ratio, reduces the requirements for the energy storage battery, and expands the usage range of the LED module. When the energy storage battery discharges to the LED module, it can achieve a wide input voltage (i.e., >2:1) and an ultra-high duty cycle control (i.e., >10:1) output, supporting the power supply of a single energy storage battery, reducing the design difficulty of the energy storage battery string, and improving the reliability of the energy storage battery operation.

[0073] (4) The multi-circuit energy storage street lamp system supports the external connection of multiple sensor modules, ensuring that while normal power supply to the LED module is completed, it also has the characteristics of intelligent street lamps such as perception and communication.

[0074] (5) The control method of the multi-circuit energy storage street lamp system can achieve "peak shaving and valley filling" in power consumption, making more effective use of electric energy and improving its social and economic benefits.

[0075] All actions of obtaining signals, information, or data in this application are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where it is located and with the authorization given by the owner of the corresponding device.

[0076] Each embodiment in this specification is described in a progressive manner. The key points of each embodiment are the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0077] Specific examples are used in this article to elaborate on the principles and implementation methods of this application. The descriptions of the above embodiments are only used to help understand the method and its core idea of this application; at the same time, for those of ordinary skill in the art, based on the idea of this application, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. A multi-circuit energy storage street lamp system, characterized in that: The multi-circuit energy storage street lamp system includes: an LED module, an LED power supply module, a battery charging module, a battery discharging module, an energy storage battery and an MCU control module; One end of the LED power supply module is connected to the mains terminal, and the other end of the LED power supply module is connected to the LED module; the mains terminal, the LED power supply module and the LED module form a first loop; One end of the battery charging module is connected to the mains terminal, and the other end of the battery charging module is connected to the energy storage battery; one end of the battery discharging module is connected to the energy storage battery, and the other end of the battery discharging module is connected to the LED module; the mains terminal and the battery charging module, the energy storage battery, the battery discharging module and the LED module form a second loop; The MCU control module is connected to the LED power supply module, the battery charging module and the battery discharging module respectively; the MCU control module is used for: Obtaining a detection signal and a detection time of the multi-circuit energy storage street lamp system; Determine whether the first circuit and the second circuit have faults according to the detection signal; When the first circuit has a fault and the detection time is within a set time range, controlling the second circuit to supply power to the LED module; When the second circuit has a fault and the detection time is within a set time range, controlling the first circuit to supply power to the LED module; When both the first circuit and the second circuit have faults and the detection time is within a set time range, the energy storage battery is controlled to supply power to the LED module.

2. The multi-circuit energy storage street lamp system according to claim 1, characterized in that: The multi-circuit energy storage street lamp system has four working modes, namely, LED module direct power supply mode, energy storage battery charging and discharging mode, energy storage battery single charging mode and energy storage battery single discharging mode.

3. The multi-circuit energy storage street lamp system according to claim 2, characterized in that: The LED module direct power supply mode is realized through the first circuit; the energy storage battery charging and discharging mode, the energy storage battery separate charging mode and the energy storage battery separate discharging mode are all realized through the second circuit.

4. The multi-circuit energy storage street lamp system according to claim 1, characterized in that: The battery discharge module comprises: a three-port auto-coupling inductor, a freewheeling diode, a feeding diode and a switch tube; the three-port auto-coupling inductor comprises a first winding and a second winding connected in series; The three-port autoinductor has an intermediate tap; one end of the intermediate tap is connected to the common end of the first winding and the second winding; the other end of the intermediate tap is respectively connected to the positive electrode of the energy feeding diode and the first end of the switch tube; the first end of the three-port autoinductor is connected to the energy storage battery; the second end of the three-port autoinductor is connected to the positive electrode of the freewheeling diode; the cathode of the freewheeling diode is respectively connected to the cathode of the energy feeding diode and the LED module; the second end of the switch tube is grounded; the third end of the switch tube is connected to the MCU control module; The MCU control module is also used to control the on-time and off-time of the switch tube by changing the duty cycle of the PWM signal.

5. The multi-circuit energy storage street lamp system according to claim 4, characterized in that: The switch tube is an insulated gate field effect tube; the drain of the switch tube is respectively connected to the other end of the middle tap and the positive electrode of the energy feeding diode; the source of the switch tube is grounded; and the gate of the switch tube is connected to the MCU control module.

6. The multi-circuit energy storage street lamp system according to claim 1, characterized in that: The multi-circuit energy storage street lamp system can be externally connected to a module with detection and / or control functions.

7. A control method for a multi-circuit energy storage street lamp system, characterized in that: The control method of the multi-circuit energy storage street lamp system is applied to the multi-circuit energy storage street lamp system according to any one of claims 1 to 6, and the control method of the multi-circuit energy storage street lamp system includes: Obtaining a detection signal and a detection time of the multi-circuit energy storage street lamp system; Determine whether there is a fault in the first circuit and the second circuit according to the detection signal; When the first circuit has a fault and the detection time is within a set time range, controlling the second circuit to supply power to the LED module; When the second circuit has a fault and the detection time is within a set time range, controlling the first circuit to supply power to the LED module; When both the first circuit and the second circuit have faults and the detection time is within a set time range, the energy storage battery is controlled to supply power to the LED module.

8. The control method of the multi-circuit energy storage street lamp system according to claim 7, characterized in that: The control method of the multi-circuit energy storage street lamp system also includes: Determine the power supply period of the current power grid according to the detection time; When the detection time is within the set time range and the power supply period of the current power grid is at the peak period, the battery discharge module is controlled to operate so that the energy storage battery discharges to the LED module; When the detection time is within the set time range and the power supply period of the current power grid is in the off-peak period, the battery charging module and the battery discharging module are controlled to operate so that the energy storage battery can charge and discharge the LED module at the same time.

9. The control method of the multi-circuit energy storage street lamp system according to claim 7, characterized in that: The detection signal includes a first circuit detection signal and a second circuit detection signal; judging whether the first circuit and the second circuit have faults according to the detection signal specifically includes: When receiving the first circuit detection signal that is abnormal, determining that there is a fault in the first circuit; When receiving the second circuit detection signal that is abnormal, determining that there is a fault in the second circuit; When both the first circuit detection signal and the second circuit detection signal received are abnormal, it is determined that both the first circuit and the second circuit are faulty.

10. The control method of the multi-circuit energy storage street lamp system according to claim 7, characterized in that: The control method of the multi-circuit energy storage street lamp system also includes: Determining the usage time of the multi-circuit energy storage street lamp system; When the usage time reaches the set time value, the first circuit and the second circuit are inspected and repaired, and the energy storage battery is replaced.

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