Lighting photovoltaic power supply system control device
By introducing a clock controller and a load-level circuit breaker mechanism into the photovoltaic power supply system, hierarchical management of lighting loads is achieved, solving the problem of unreasonable photovoltaic power distribution and improving the utilization efficiency of batteries and the power supply reliability of the system.
Patent Information
- Application Number
- CN202520068674.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-13
AI Technical Summary
How to rationally allocate photovoltaic power and achieve hierarchical management of lighting loads to reduce the amount of batteries used and solve the problem of reduced battery load capacity in off-grid photovoltaic power generation systems at night.
A control device for a lighting photovoltaic power supply system is adopted, including a clock controller and a load-level circuit breaker mechanism. The lighting load is managed in a hierarchical manner through the load-level circuit breaker, and the opening and closing of the load is adjusted according to the lighting demand in different time periods to achieve the rational distribution of photovoltaic power.
By implementing load-level management, the energy storage capacity of batteries is maximized, the amount of batteries used is reduced, the reliability and continuity of the power supply system are improved, and energy waste is reduced.
Smart Images
Figure CN223758030U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to photovoltaic application technical field especially relates to a lighting photovoltaic power supply system control device. BACKGROUND
[0002] Nowadays, petrochemical energy such as coal, oil and natural gas is gradually short, and strengthening renewable energy development and utilization is the only way for human society to realize sustainable development. Solar energy is a kind of free clean energy that can be taken without limit and used without limit, and is the most suitable, safest and ideal alternative energy for future human beings.
[0003] Photovoltaic power generation is a kind of technology for directly converting light energy into electric energy by using the photovoltaic effect of the interface of semiconductor, mainly composed of solar cell panel (component), controller and inverter three parts, and main components are composed of electronic components. Photovoltaic power generation system is widely used in municipal and other ordinary lighting fields, and photovoltaic power generation is used when sunlight is sufficient during the day, and the electric energy stored in the storage battery is used for night lighting. With the increasing darkness, people's outdoor activities decrease, and the demand for artificial lighting decreases. During the natural discharge process of the storage battery of the off-grid photovoltaic power generation system, the carrying capacity decreases, and the terminal voltage also decreases.
[0004] Therefore, how to reasonably distribute photovoltaic electric energy and realize hierarchical management of lighting load to reduce the amount of storage battery has become a technical problem to be solved. INVENTION CONTENTS
[0005] The utility model patent aims at providing a lighting photovoltaic power supply system control device, which reasonably distributes photovoltaic electric energy, realizes hierarchical management of lighting load, fully plays the energy storage role of the storage battery, and thus reduces the amount of storage battery.
[0006] In the first aspect, the utility model provides a lighting photovoltaic power supply system control device, which comprises: a shell, a clock controller (C1), a main switch (K1) and a load hierarchical circuit breaking mechanism (K2) arranged in the shell; wherein the input end of the clock controller (C1) is connected with the output end of the photovoltaic power supply system, the output end of the clock controller (C1) is connected with the first end of the main switch (K1), the second end of the main switch (K1) is connected with the input end of the load hierarchical circuit breaking mechanism (K2), and the output end of the load hierarchical circuit breaking mechanism (K2) is connected with at least one lighting load.
[0007] Preferably, the load hierarchical circuit breaking mechanism (K2) comprises at least one low-voltage circuit breaker with a loss-of-voltage release coil.
[0008] Preferably, the load grading circuit mechanism (K2) comprises a first low-voltage circuit breaker (K3) with a loss-of-voltage release coil, a second low-voltage circuit breaker (K4) and a third low-voltage circuit breaker (K5); wherein the third end of the first low-voltage circuit breaker (K3), the fifth end of the second low-voltage circuit breaker (K4) and the seventh end of the third low-voltage circuit breaker (K5) are connected to the second end of the main switch (K1) respectively; the fourth end of the first low-voltage circuit breaker (K3), the sixth end of the second low-voltage circuit breaker (K4) and the eighth end of the third low-voltage circuit breaker (K5) are connected to at least one lighting load respectively.
[0009] Preferably, the action setting values of the first low-voltage circuit breaker (K3), the second low-voltage circuit breaker (K4) and the third low-voltage circuit breaker (K5) are 0.7UE.
[0010] Preferably, the first action time of the first low-voltage circuit breaker (K3) is less than the second action time of the second low-voltage circuit breaker (K4), and the second action time is less than the third action time of the third low-voltage circuit breaker (K5).
[0011] Preferably, the load grading circuit mechanism (K2) comprises a fourth low-voltage circuit breaker (K6) with a loss-of-voltage release coil and a fifth low-voltage circuit breaker (K7); wherein the ninth end of the fourth low-voltage circuit breaker (K6) and the eleventh end of the fifth low-voltage circuit breaker (K7) are connected to the second end of the main switch (K1) respectively; the tenth end of the fourth low-voltage circuit breaker (K6) and the twelfth end of the fifth low-voltage circuit breaker (K7) are connected to at least one lighting load respectively.
[0012] Preferably, the action setting values of the fourth low-voltage circuit breaker (K6) and the fifth low-voltage circuit breaker (K7) are 0.7UE.
[0013] Preferably, the fourth action time of the fourth low-voltage circuit breaker (K6) is less than the fifth action time of the fifth low-voltage circuit breaker (K7).
[0014] Preferably, the shell is a galvanized steel plate.
[0015] The utility model discloses can according to lighting load in different time period's work need, realizes grading management to lighting load through load grading circuit mechanism, thereby realizes the reasonable distribution of photovoltaic electric energy, thereby makes the wide range of battery charge and discharge, the energy storage function of battery is played to the maximum, reduces the use amount of battery, realizes the environmental protection goal. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The structure schematic diagram of photovoltaic power supply system provided by the embodiment of the application is shown in the figure.
[0017] Figure 2This application provides a schematic diagram of the structure of a lighting photovoltaic power supply system control device.
[0018] Figure 3 This application provides a schematic diagram of a scenario application for a lighting photovoltaic power supply system control device.
[0019] Figure 4 This is a schematic diagram illustrating a scenario application of another lighting photovoltaic power supply system control device provided in an embodiment of this application;
[0020] In the diagram: C1, clock controller; K1, main switch; K2, load-level circuit breaker mechanism; K3, first low-voltage circuit breaker; K4, second low-voltage circuit breaker; K5, third low-voltage circuit breaker; K6, fourth low-voltage circuit breaker; K7, fifth low-voltage circuit breaker. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] The lighting photovoltaic power supply system control device provided in this application embodiment is mainly used for the automatic control of the photovoltaic power supply system. Please refer to [link / reference]. Figure 1 , Figure 1 This is a schematic diagram of the structure of the photovoltaic power supply system provided in the embodiments of this application, such as... Figure 1 As shown, the photovoltaic power supply system includes a photovoltaic power generation unit and a lighting load. The control device described in this application embodiment serves as a connection device between the photovoltaic power generation unit and the lighting load. The output terminal (i.e., the output terminal of the photovoltaic power supply system) OUT of the photovoltaic power generation unit is connected to the input terminal (i.e., the input terminal of the clock controller) of the control device described in this application embodiment, and the output terminal (i.e., the output terminal of the load grading circuit breaker mechanism) of the control device described in this application embodiment is connected to the lighting load.
[0023] The photovoltaic power generation unit consists of photovoltaic panels (S1 to Sn, the specific number of which can be set according to the application scenario and is not limited to this). Figure 1 As shown, attached Figure 1A photovoltaic system is composed of photovoltaic panels (for example, 10 photovoltaic panels), an inverter, a battery, and a controller, etc. The photovoltaic panel is a power generation device that generates direct current when exposed to sunlight, and is composed of thin solid photovoltaic cells made of almost all semiconductor materials (for example, silicon). The inverter is a device that converts direct current into alternating current, and is composed of an inverter bridge, control logic, and a filter circuit. The battery is an electrochemical device that stores chemical energy and releases electric energy when necessary. The controller receives input signals from sensors or other devices, and generates corresponding output signals, thereby achieving precise control of the controlled object. This part is not described in detail as prior art.
[0024] Embodiment One
[0025] Please refer to Figure 2 , Figure 2 A structure diagram of a lighting photovoltaic power supply system control device provided by the embodiment of the present application. As shown in Figure 2 , the control device includes a shell, the shell is a galvanized steel plate, and a clock controller (C1), a main switch (K1), and a load grading circuit mechanism (K2) arranged in the shell; wherein the input end of the clock controller (C1) is connected to the output end of the photovoltaic power supply system, the output end of the clock controller (C1) is connected to the first end of the main switch (K1), the second end of the main switch (K1) is connected to the input end of the load grading circuit mechanism (K2), and the output end of the load grading circuit mechanism (K2) is connected to at least one lighting load.
[0026] The control device sets time nodes in advance through the clock controller (C1), controls the opening and closing of the main switch (K1), and realizes the opening and closing of the at least one lighting load. For example, the first preset time node (AM 6:00) of the clock controller (C1) is set to control the main switch (K1) to be tripped, and the power supply of all lighting loads is cut off. At this time, it is daytime, the photovoltaic power supply system converts light energy into electrical energy through the photovoltaic panel of the photovoltaic power generation unit, and charges the battery with the converted electrical energy. The second preset time node (PM 6:00) of the clock controller (C1) is set to control the main switch (K1) to be closed, and the power supply of all lighting loads is turned on. At this time, it is night, the battery of the photovoltaic power supply system enters the discharge mode to supply power to all lighting loads. The photovoltaic power supply system described in the embodiment of the application includes a photovoltaic power generation unit, the photovoltaic power generation unit includes a photovoltaic panel, an inverter, a battery pack, and a controller, etc.; wherein the photovoltaic panel is used to convert light energy into electrical energy, the inverter is used to convert the converted direct current electrical energy into alternating current, which is composed of an inverter bridge, a control logic, and a filter circuit, the battery pack is a kind of electrical chemical device that stores chemical energy and releases electrical energy when necessary, the controller receives input signals from sensors or other devices and generates corresponding output signals to realize accurate control of the controlled object, this part is not described too much as prior art, of course, it can be understood that the photovoltaic power supply system also includes at least one lighting load described above.
[0027] The control device described in the embodiment of the application also realizes the hierarchical management of each part of the at least one lighting load through the load hierarchical circuit breaking mechanism (K2). For example, in some places where there is personnel activity at night but the requirement for artificial lighting is not high, after entering the late night, all lighting loads do not need to be turned on. On the one hand, the power supply voltage of the battery is insufficient, and on the other hand, it also causes unnecessary waste of electrical energy. Therefore, through the hierarchical management of each part of the lighting load by the load hierarchical circuit breaking mechanism (K2), only a small part of the lighting load needs to be kept in the on state after entering the late night, and in the first half of the night, more lighting loads can be kept in the on state due to more people going in and out.
[0028] Therefore, according to the working needs of the lighting load in different time periods, and through the hierarchical management of each part of the at least one lighting load by the load hierarchical circuit breaking mechanism (K2), the reasonable distribution of photovoltaic electrical energy is realized; the battery is widely charged and discharged, the energy storage function of the battery is maximized, the use amount of the battery is reduced, under the same lighting target conditions, the number of photovoltaic cell assemblies can be reduced, the system capacity can be reduced, and the efficiency of the photovoltaic power generation system is fully utilized.
[0029] Specifically, the hierarchical management of the lighting load can be realized by several low-voltage circuit breakers. The load hierarchical circuit breaking mechanism (K2) comprises at least one low-voltage circuit breaker with a loss-of-voltage release coil. According to the actual application scene, the above at least one lighting load is divided into several groups, each group containing at least one lighting load, and the lighting load of each group is connected with a low-voltage circuit breaker. By setting the action setting value and action time of different low-voltage circuit breakers, when the battery is in the discharging mode after entering the night, the hierarchical management of different groups of lighting loads is realized. For example, in the parking lot of a certain community, there are a total of 100 lighting loads, which are divided into 4 groups corresponding to 4 low-voltage circuit breakers. Among them, the first group contains 10 lighting loads, the second group contains 20 lighting loads, the third group contains 30 lighting loads, and the fourth group contains 40 lighting loads. The action time of the first low-voltage circuit breaker is set to 2s, the action time of the second low-voltage circuit breaker is set to 1.5s, the action time of the third low-voltage circuit breaker is set to 1s, and the action time of the fourth low-voltage circuit breaker is set to 0.5s. The action setting value of the four low-voltage circuit breakers is set to 0.7UE, that is, when the battery is in the discharging mode after entering the night:
[0030] The first stage of the battery discharge, parking lot activities more, at this time the battery storage of electric energy since entering the discharge mode is also the most sufficient, can meet the four low-voltage circuit breaker rated voltage UE, therefore, four groups of lighting load (ie all 100 lighting load) are in working condition; With the continuous discharge, parking lot activities in reducing, the battery storage of electric energy in the drop, its power supply voltage is also in the drop, when the circuit power supply voltage drops to 0.7UE below, because the fourth low-voltage circuit breaker action time is the shortest, therefore, first is the fourth low-voltage circuit breaker loss voltage release coil in the loss voltage state, under the action of spring force and other mechanical force, make the circuit breaker contact is disconnected, thereby cutting off the circuit, at this time, the fourth group of 40 lighting load is closed, only the remaining three groups of 60 lighting load, because the reduction of lighting load, the remaining 60 lighting load can continue to be kept in working condition. The battery continues to discharge process, parking lot activities continue to reduce, for the same reason, the battery storage of electric energy again because of the reason of electric energy consumption and drop, when the circuit power supply voltage drops again to 0.7UE below, at this time, the third group of the third low-voltage circuit breaker starts to act, cutting off the third group of lighting load, only the remaining 30 lighting load continue to work. The battery continues to discharge process, parking lot activities further reduce, at this time the scene, has entered the night, usually only a few car owners and parking lot patrolmen, for the same reason, the battery storage of electric energy again because of the reason of electric energy consumption and drop, when the circuit power supply voltage drops again to 0.7UE below, at this time, the second low-voltage circuit breaker starts to act, cutting off the second group of lighting load, only the last remaining 10 lighting load continue to work. Correspondingly, when the time comes to 6:00 in the morning, because the first preset time node (AM6:00) set by the above clock controller (C1), control the main switch (K1) is open, cut off the power supply of all lighting load, at this time, into the day, photovoltaic power supply system through the photovoltaic panel of photovoltaic power generation unit will light energy into electric energy, and the conversion of electric energy for battery charging. When the time comes to 6:00 in the afternoon, because the second preset time node (PM6:00) set by the above clock controller (C1), control the main switch (K1) is closed, turn on the power supply of all lighting load, at this time, into the night, photovoltaic power supply system battery into discharge mode, power supply for all lighting load. Such a cycle.
[0031] It should be noted that the battery running time can be set according to the regional differences and the use needs, combined with the capacity of lighting load, the capacity of the battery is matched accordingly.
[0032] The following two examples are described in detail:
[0033] Example two
[0034] Please refer toFigure 3 , Figure 3 A scene application schematic diagram of a lighting photovoltaic power supply system control device provided by an embodiment of the present application; the embodiment of the present application is applicable to places where personnel activities occur at night and artificial lighting requirements are not high, such as semi-open parking facilities and similar areas.
[0035] As shown in Figure 3 , the load grading circuit breaker mechanism (K2) comprises a first low-voltage circuit breaker (K3) with a loss-of-voltage release coil, a second low-voltage circuit breaker (K4), and a third low-voltage circuit breaker (K5); wherein the third end of the first low-voltage circuit breaker (K3), the fifth end of the second low-voltage circuit breaker (K4), and the seventh end of the third low-voltage circuit breaker (K5) are respectively connected to the second end of the main switch (K1); the fourth end of the first low-voltage circuit breaker (K3), the sixth end of the second low-voltage circuit breaker (K4), and the eighth end of the third low-voltage circuit breaker (K5) are respectively connected to at least one lighting load.
[0036] Among them, the action setting value of the first low-voltage circuit breaker (K3), the second low-voltage circuit breaker (K4), and the third low-voltage circuit breaker (K5) is 0.7UE. The first action time of the first low-voltage circuit breaker (K3) is set to 3s, the second action time of the second low-voltage circuit breaker (K4) is set to 1.5s, and the third action time of the third low-voltage circuit breaker (K5) is set to 0.5s.
[0037] The use conditions of the application scenario are divided into three operating modes:
[0038] The first mode is in the evening (PM 6:00 to PM 9:00), all lighting loads are put into use to meet the needs of use;
[0039] The second mode is at night (PM 9:00 to PM 11:00), 45% of the lighting loads are reduced for night lighting;
[0040] The third mode is at midnight (PM 11:00 to the next day AM 6:00), 40% of the lighting loads are further reduced, and only 15% of the lighting loads (basic loads) are reserved for on-duty lighting.
[0041] As described above, assuming that the total number of lighting loads used in this scenario is 200, the 200 lighting loads are divided into three groups according to the requirements of the above use conditions, the first group contains 30 lighting loads, denoted as lighting load A1, the second group contains 80 lighting loads, denoted as lighting load A2, and the third group contains 90 lighting loads, denoted as lighting load A3. It can be understood that each group can adaptively select one or more low-voltage circuit breakers according to the capacity size, that is, the above three groups of lighting loads correspond to at least one first low-voltage circuit breaker (K3), at least one second low-voltage circuit breaker (K4), and at least one third low-voltage circuit breaker (K5).
[0042] During the daytime period (AM 6:00 to PM 6:00), the photovoltaic power supply system converts light energy into electrical energy through the photovoltaic panels of the photovoltaic power generation unit, and charges the battery with the converted electrical energy. In this case, the clock controller (C1) sets the time node 1 (AM 6:00) to control the main switch (K1) to open the circuit and cut off the power supply of all lighting loads.
[0043] When entering the nighttime period (PM 6:00 to the next day AM 6:00), the battery of the photovoltaic power supply system enters the discharging mode. Therefore, the clock controller (C1) sets the time node 2 (PM 6:00) to control the main switch (K1) to close the circuit. At this time, the battery has sufficient stored electrical energy, and the supply voltage meets the rated working voltage UE of the first low-voltage circuit breaker (K3), the second low-voltage circuit breaker (K4), and the third low-voltage circuit breaker (K5). The low-voltage circuit breaker is energized to generate a magnetic field under the normal rated working voltage, so that the under-voltage release coil is kept in the closed position, and the low-voltage circuit breaker can be normally closed, and the circuit remains in the conducting state. That is, at this time, the battery supplies power to all lighting loads, ensuring the lighting needs of the site.
[0044] When the system runs for a period of time, the stored electrical energy of the battery decreases, the supply end voltage decreases, and the demand for personnel activities decreases. When the supply end voltage drops below the action setting value (70% UE) of the first low-voltage circuit breaker (K3), the second low-voltage circuit breaker (K4), and the third low-voltage circuit breaker (K5), the circuit breaker considers that the circuit has an under-voltage or under-voltage condition and needs to take protective measures to cut off the circuit to prevent electrical equipment from being damaged by running at low voltage. Therefore, the first low-voltage circuit breaker (K3), the second low-voltage circuit breaker (K4), and the third low-voltage circuit breaker (K5) will start to act, but since the first action time of the first low-voltage circuit breaker (K3) is set to 3s, the second action time of the second low-voltage circuit breaker (K4) is set to 1.5s, and the third action time of the third low-voltage circuit breaker (K5) is set to 0.5s; therefore, after 0.5s, the circuit voltage has not recovered to the normal range, and the third low-voltage circuit breaker (K5) will trip first to cut off the circuit, i.e., cut off the power supply of the lighting load A3, so that the supply end voltage of the system is restored to ensure that the remaining lighting load A1 and lighting load A2 can be in normal working state.
[0045] When the system continues to run for a period of time, the battery storage continues to reduce the electrical energy, the power supply end voltage decreases again, and the personnel activity demand further reduces. When the power supply end voltage drops below the action setting value (70% Ue) of the first low-voltage circuit breaker (K3) and the second low-voltage circuit breaker (K4), the circuit breaker considers that the circuit has an under-voltage or loss of voltage condition, and needs to take protective measures to cut off the circuit to prevent the electrical equipment from being damaged by running at low voltage. Therefore, the first low-voltage circuit breaker (K3) and the second low-voltage circuit breaker (K4) will be ready to act, but since the first action time of the first low-voltage circuit breaker (K3) is set to 3s, and the second action time of the second low-voltage circuit breaker (K4) is set to 1.5s; therefore, after 1.5s, the circuit voltage has not recovered to the normal range, the second low-voltage circuit breaker (K4) will trip first, cutting off the circuit, i.e. cutting off the power supply of the lighting load A2, so that the power supply end voltage of the system is restored, ensuring that the remaining lighting load A1 can smoothly enter the normal working state, and at this time only 15% of the lighting load (basic load) is reserved as the on-duty lighting.
[0046] Through the difference between the above-mentioned action times, selective protection is realized, and the situation that the entire system is powered off due to slight voltage fluctuations is avoided, improving the reliability and continuity of power supply. At the same time, hierarchical management of the lighting load is also realized.
[0047] After the next day dawns (after AM 6:00), the clock controller (C1) controls the main switch (K1) to open the gate due to the set time node 1 (AM 6:00), cutting off the power supply of all lighting loads, and the photovoltaic power supply system enters the photovoltaic power generation mode and the battery charging mode.
[0048] This cycle is executed, and according to the working needs of the lighting load at different time periods, hierarchical management of the lighting load is realized, so as to realize reasonable allocation of photovoltaic electrical energy; so as to make the battery wide-range charge and discharge, maximize the energy storage effect of the battery, reduce the use amount of the battery, and realize the environmental protection goal.
[0049] Embodiment Three
[0050] Please refer to Figure 4 , Figure 4 Another scene application schematic diagram of the lighting photovoltaic power supply system control device provided by the embodiment of the application; the embodiment of the application is applicable to centralized power supply of a community, a municipal road, or a landscape ornament lighting.
[0051] As Figure 4As shown, the load grading circuit breaker mechanism (K2) comprises a fourth low-voltage circuit breaker (K6) with a loss-of-voltage release coil and a fifth low-voltage circuit breaker (K7); wherein the ninth end of the fourth low-voltage circuit breaker (K6) and the eleventh end of the fifth low-voltage circuit breaker (K7) are respectively connected to the second end of the main switch (K1); the tenth end of the fourth low-voltage circuit breaker (K6) and the twelfth end of the fifth low-voltage circuit breaker (K7) are respectively connected to at least one lighting load.
[0052] The action setting value of the fourth low-voltage circuit breaker (K6) and the fifth low-voltage circuit breaker (K7) is 0.7UE. The fourth action time of the fourth low-voltage circuit breaker (K6) is 0.5s, and the fifth action time of the fifth low-voltage circuit breaker (K7) is 1.5s.
[0053] The use conditions of the application scenario are divided into two operation modes:
[0054] The first mode is in the evening (PM6:00 to PM12:00), all lighting loads are put into use to meet the needs of use.
[0055] The second mode is in the late night (PM12:00 to AM6:00), 50% of the lighting loads are reduced for night lighting.
[0056] As described above, assuming that the total number of lighting loads used in this scenario is 100, these 100 lighting loads are evenly divided into two groups according to the above use conditions, each group containing 50 lighting loads, which are respectively referred to as lighting loads A4 and A5. It can be understood that each group can adaptively select one or more low-voltage circuit breakers according to the capacity, that is, the above two groups of lighting loads correspond to at least one fourth low-voltage circuit breaker (K6) and at least one fifth low-voltage circuit breaker (K7) respectively.
[0057] During the daytime period (AM6:00 to PM6:00), the photovoltaic power supply system converts light energy into electrical energy through the photovoltaic panel of the photovoltaic power generation unit, and charges the storage battery with the converted electrical energy. In this case, the clock controller (C1) sets the time node 1 (AM6:00) to control the main switch (K1) to open the gate and cut off the power supply of all lighting loads.
[0058] When entering the evening period (PM 6:00 to next day AM 6:00), the battery of the photovoltaic power supply system enters the discharging mode. Therefore, the clock controller (C1) sets the time node 2 (PM 6:00) according to the site use requirement, controls the main switch (K1) to close, at this time, the battery stored electric energy is sufficient, the supply voltage meets the rated working voltage UE of the fourth low-voltage circuit breaker (K6) and the fifth low-voltage circuit breaker (K7), the low-voltage circuit breaker is in the normal rated working voltage, the loss of voltage release coil is electrified to generate a magnetic field, so that the loss of voltage release coil is kept in the closed position, the low-voltage circuit breaker can be normally closed, and the circuit remains in the conducting state, that is, at this time, the battery supplies power to all lighting loads, and the site lighting needs are guaranteed.
[0059] When the system runs for a period of time, the battery stored electric energy is reduced, the supply end voltage is lowered, and the personnel activity demand is reduced. When the supply end voltage is lowered to below the action setting value (70% UE) of the fourth low-voltage circuit breaker (K6) and the fifth low-voltage circuit breaker (K7), the circuit breaker considers that the circuit has an under-voltage or loss of voltage condition, and needs to take protective measures to cut off the circuit to prevent the electrical equipment from being damaged due to operation under low voltage. Therefore, the fourth low-voltage circuit breaker (K6) and the fifth low-voltage circuit breaker (K7) will start to act, but since the fourth action time of the fourth low-voltage circuit breaker (K6) is 0.5 s and the fifth action time of the fifth low-voltage circuit breaker (K7) is 1.5 s, after 0.5 s, the circuit voltage has not recovered to the normal range, the fourth low-voltage circuit breaker (K6) will act first and cut off the circuit, that is, cut off the power supply of the lighting load A4, cut off 50% of the lighting load, so that the supply end voltage of the system is restored, and the system enters the night operation mode, so as to guarantee that the remaining lighting load A5 can be in the normal working state. That is, all the lighting loads are lit in the first half of the night, and only half of the lighting loads are lit in the second half of the night. Through the difference between the above-mentioned action times, selective protection is realized, and the situation that the whole system is powered off due to slight voltage fluctuation is avoided, and the reliability and continuity of power supply are improved. At the same time, hierarchical management of the lighting load is also realized.
[0060] After the next day dawns (after AM 6:00), the clock controller (C1) controls the main switch (K1) to open due to the set time node 1 (AM 6:00), cuts off the power supply of all lighting loads, and the photovoltaic power supply system enters the photovoltaic power generation mode and the battery charging mode.
[0061] This cycle is executed, the lighting load is hierarchically managed according to the working needs of the lighting load in different time periods, so as to realize reasonable allocation of photovoltaic electric energy, so as to enable the battery to be widely charged and discharged, maximize the energy storage effect of the battery, reduce the use amount of the battery, and realize the environmental protection goal.
[0062] As described above, the action time of the fourth low-voltage circuit breaker (K6) and the fifth low-voltage circuit breaker (K7) in the embodiments of the present application can be periodically alternately set, so as to ensure that the service life of the two groups of lighting loads is equivalent.
[0063] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. An illumination photovoltaic powered system control device, characterized by, The utility model relates to a photovoltaic power supply system, comprising: a housing, and a clock controller (C1), a main switch (K1) and a load grading circuit breaker mechanism (K2) arranged inside the housing; wherein an input end of the clock controller (C1) is connected to an output end of a photovoltaic power supply system, an output end of the clock controller (C1) is connected to a first end of the main switch (K1), a second end of the main switch (K1) is connected to an input end of the load grading circuit breaker mechanism (K2), and an output end of the load grading circuit breaker mechanism (K2) is connected to at least one lighting load.
2. The control device of claim 1, wherein The load grading circuit breaker mechanism (K2) comprises at least one low-voltage circuit breaker with a loss-of-voltage release coil.
3. The control device of claim 2, wherein The load grading circuit breaker mechanism (K2) comprises a first low-voltage circuit breaker (K3), a second low-voltage circuit breaker (K4) and a third low-voltage circuit breaker (K5) with loss-of-voltage release coils; wherein a third end of the first low-voltage circuit breaker (K3), a fifth end of the second low-voltage circuit breaker (K4) and a seventh end of the third low-voltage circuit breaker (K5) are respectively connected to the second end of the main switch (K1); a fourth end of the first low-voltage circuit breaker (K3), a sixth end of the second low-voltage circuit breaker (K4) and an eighth end of the third low-voltage circuit breaker (K5) are respectively connected to at least one lighting load.
4. The control device of claim 3, wherein The action setting values of the first low-voltage circuit breaker (K3), the second low-voltage circuit breaker (K4) and the third low-voltage circuit breaker (K5) are 0.7 UE.
5. The control device of claim 4, wherein The first action time of the first low-voltage circuit breaker (K3) is less than the second action time of the second low-voltage circuit breaker (K4), and the second action time is less than the third action time of the third low-voltage circuit breaker (K5).
6. The control device of claim 2, wherein The load grading circuit breaker mechanism (K2) comprises a fourth low-voltage circuit breaker (K6) and a fifth low-voltage circuit breaker (K7) with loss-of-voltage release coils; wherein a ninth end of the fourth low-voltage circuit breaker (K6) and an eleventh end of the fifth low-voltage circuit breaker (K7) are respectively connected to the second end of the main switch (K1); a tenth end of the fourth low-voltage circuit breaker (K6) and a twelfth end of the fifth low-voltage circuit breaker (K7) are respectively connected to at least one lighting load.
7. The control device of claim 6, wherein The action setting values of the fourth low-voltage circuit breaker (K6) and the fifth low-voltage circuit breaker (K7) are 0.7 UE.
8. The control device of claim 7, wherein The fourth action time of the fourth low-voltage circuit breaker (K6) is less than the fifth action time of the fifth low-voltage circuit breaker (K7).
9. The control device according to any one of claims 1 to 8, characterized by The housing is a galvanized steel plate.