CN219535906U - Power supply circuit, electrical equipment and optical storage system - Google Patents

Abstract

The utility model provides a power supply circuit, an electrical device and an optical storage system, comprising: the power panel unit comprises an alternating current power panel and a direct current power panel which are respectively and electrically connected with an input power supply and used for outputting direct current; the loss unit is electrically connected with the alternating current power supply board and the direct current power supply board respectively; the control unit is electrically connected with the output ends of the alternating current power supply board and the direct current power supply board and used for controlling the running state of the loss unit; and the switch unit is electrically connected between the power panel unit and the control unit. By the power supply circuit, devices in the power supply circuit can be protected.

Description

Power supply circuit, electrical equipment and optical storage system

Technical Field

The present utility model relates to the field of power supply technologies, and in particular, to a power supply circuit, an electrical apparatus, and an optical storage system.

Background

In general, an auxiliary power supply circuit of a photovoltaic inverter or an energy storage converter takes power from a power grid side, and then performs voltage change output through a transformer, so as to supply power to internal devices of the auxiliary power supply circuit, and the whole process is that alternating current is input and output. Because voltage fluctuation exists in an actual power grid, the voltage fluctuation can cause the problems of overvoltage failure, overvoltage failure or undervoltage inactivity of a switching action loop and the like of devices in an auxiliary power supply circuit, and the devices in the power supply circuit can be damaged. Therefore, there is a need for improvement.

Disclosure of Invention

In view of the above-described drawbacks of the prior art, an object of the present utility model is to provide a power supply circuit, an electrical apparatus, and an optical storage system, which can protect devices in the power supply circuit.

To achieve the above and other related objects, the present utility model provides a power supply circuit comprising:

the power panel unit comprises an alternating current power panel and a direct current power panel which are respectively and electrically connected with an input power supply and used for outputting direct current;

the loss unit is electrically connected with the alternating current power supply board and the direct current power supply board respectively;

the control unit is electrically connected with the output ends of the alternating current power supply board and the direct current power supply board and used for controlling the running state of the loss unit; and

and the switch unit is electrically connected between the power panel unit and the control unit.

In an embodiment of the present utility model, the ac power supply is electrically connected to an ac power supply in the input power supply, and the dc power supply is electrically connected to a dc power supply in the input power supply.

In an embodiment of the present utility model, the device further includes an interface unit, where the interface unit is electrically connected to an output end of the switch unit, and the interface unit adopts a man-machine interface.

In an embodiment of the utility model, the switch unit is a diode, the diode is electrically connected between the ac power board and the control unit, the diode is electrically connected between the dc power board and the control unit, and the diode is used for preventing current reverse-flowing of the circuit.

In an embodiment of the present utility model, the power supply device further includes a fan unit, where the fan unit is located in the loss unit, and the loss unit is electrically connected to the output end of the ac power panel and/or the dc power panel.

In an embodiment of the present utility model, the power supply device further includes a fan unit, and the fan unit is electrically connected to the output ends of the ac power panel and the dc power panel.

In an embodiment of the present utility model, the number of the power board units is at least one, the loss unit, the control unit, and the switch unit are respectively corresponding to the power board units, and an output end of the switch unit on the same power board unit is electrically connected to the corresponding control unit.

In an embodiment of the utility model, the output terminals of all the switch units are electrically connected to the interface unit.

In an embodiment of the present utility model, the power board unit outputs different direct currents based on the loss unit and/or the fan unit.

The utility model also provides an electrical device comprising the power supply circuit.

In an embodiment of the utility model, the electrical device is a photovoltaic inverter or an energy storage converter.

The utility model also provides a light storage system comprising the electrical equipment.

As described above, the present utility model provides a power supply circuit in which no transformer is present, and thus no overvoltage failure of the transformer, overvoltage failure of a switching operation circuit, undervoltage failure, or the like can occur. The loss unit is connected with the power panel unit, and the power panel unit can output stable direct current, so that the influence of voltage fluctuation of a power grid on internal devices of the power supply circuit system can be avoided, the internal devices of the power supply circuit are effectively protected, and the power supply control and power supply support of the photovoltaic inverter and the energy storage converter under all functional working conditions can be met. The loss unit can be disconnected, so that the power consumption of the power supply circuit is reduced, the flexibility of load configuration is improved, and the load power is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a power supply circuit according to an embodiment of the utility model;

FIG. 2 is a schematic diagram of a power supply circuit according to another embodiment of the present utility model;

FIG. 3 is a schematic diagram of a power supply circuit according to another embodiment of the present utility model;

FIG. 4 is a schematic diagram of an electrical device of the present utility model;

fig. 5 is a schematic diagram of an optical storage system according to the present utility model.

Description of element numbers:

100. inputting a power supply; 110. an alternating current power supply; 120. a direct current power supply; 200. a power panel unit; 210. an alternating current power supply board; 220. a DC power panel; 300. a loss unit; 400. a diode; 500. a control unit; 600. an interface unit; 700. a blower unit; 800. an electrical device; 900. and an optical storage system.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

In the present utility model, it should be noted that, as terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear, the indicated orientation or positional relationship is based on that shown in the drawings, only for convenience of description and simplification of the description, and does not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, as used herein, are used for descriptive and distinguishing purposes only and are not to be construed as indicating or implying a relative importance.

Referring to fig. 1, 2 and 3, the present utility model provides a power supply circuit, which can be applied to a power supply circuit using a photovoltaic inverter or an energy storage converter. The power supply circuit comprises a power main circuit consisting of a photovoltaic inverter or an energy storage converter. When the input power source 100 at the input end of the power supply circuit is a power grid, the power supply circuit can output stable low-voltage direct current to supply power to the photovoltaic inverter or the energy storage converter. The source of the input power 100 may include, but is not limited to, a wind power generation system, a photovoltaic power generation system, a tidal power generation system, and the like.

Referring to fig. 1, in one embodiment of the present utility model, a power supply circuit may include a power board unit 200, a loss unit 300, a switching unit 400, a control unit 500, and an interface unit 600. Wherein the number of the power panel units 200 may be at least one. The number of power board units 200 may be half the number of the loss units 300, and each power board unit 200 corresponds to two loss units 300. The number of the depletion units 300 is the same as the number of the switching units 400, and each depletion unit 300 corresponds to one switching unit 400. The number of power panel units 200 may be the same as the number of control units 500, and each two switch units 400 corresponds to one control unit 500. The power board unit 200 may be electrically connected to an input power source. The loss unit 300 may be electrically connected to the power panel unit 200. The switching unit 400 may be electrically connected between the power panel unit and the control unit 500. The interface unit 600 may be electrically connected to an output terminal of the switching unit 400.

Referring to fig. 1, in one embodiment of the present utility model, an input terminal of a power board unit 200 may be electrically connected to an input power source 100. The input power source 100 may include an ac power source 110 and a dc power source 120. Since the photovoltaic inverter or energy storage converter (PowerConversionSystem, PCS) has a static var generator (StaticVarGenerator, SVG) mode, the grid can be used as the ac power source 110 as the input power source 100 for the photovoltaic inverter or energy storage converter. Of course, off-grid or self-grid mode exists due to the photovoltaic inverter or energy storage converter, i.e. the grid is not used as an ac power source. In this case, the dc power supply 120 provided by another power generation system may be used as the input power supply 100 of the photovoltaic inverter or the energy storage converter. The power generation system may be a photovoltaic power generation system. Therefore, the power supply circuit provided by the utility model can meet the power supply function requirement of all functions of the photovoltaic inverter or the energy storage converter. The power supply function of the photovoltaic inverter or the energy storage converter further comprises a grid-connected mode and the like. The input power source 100 may include an ac power source 110 and/or a dc power source 120. For example, the input power source 100 includes an ac power source 110. As another example, the input power 100 includes a dc power source 120. Also for example, the input power source 100 may include an ac power source 110 and a dc power source 120. Therefore, the type of the input power source 100 can be reasonably allocated according to the actual situation, and the utility model does not limit the type and the number of the actual input power sources 100 of the power supply circuit.

Referring to fig. 1, in one embodiment of the present utility model, when the number of photovoltaic inverters or energy storage converters is one, the number of power panel units 200 is also one. The number of power board units 200 is described as one example. The power panel unit 200 may include an ac power panel 210 and a dc power panel 220. When the input power source 100 includes the ac power source 110 and the dc power source 120, the input end of the ac power board 210 may be electrically connected to the ac power source 110, the ac power board 210 may convert the input ac power into the corresponding dc power, and the input end of the dc power board 220 may be electrically connected to the dc power source 120, where the input end of the power board unit 200 has both ac power input and dc power input. When the input power source 100 includes the ac power source 110, the input terminal of the ac power board 210 is electrically connected to the ac power source 110, and the input terminal of the dc power board 220 is not electrically connected to the dc power source 120, and only the ac power is input to the input terminal of the power board unit 200. When the input power source 100 includes the dc power source 120, the input terminal of the ac power board 210 is not electrically connected to the ac power source 110, and the input terminal of the dc power board 220 is electrically connected to the dc power source 120, and only the dc power is input to the input terminal of the power board unit 200.

Referring to fig. 1, in one embodiment of the present utility model, the ac power board 210 may rectify and convert the ac power 110 by using a feedback design, so that the output terminal of the ac power board 210 can output stable dc power to supply power to other circuit devices even when the power grid has large voltage fluctuation. The voltages of the dc power outputted from the ac power supply 210 and the dc power supply 220 may include dc 220V voltage, dc 110V voltage, dc 48V voltage, dc 24V voltage, dc 12V voltage, etc. The specific magnitude of the voltage of the direct current may be designed according to the power consumption requirement of the power consumption unit 300. By adopting the alternating current power supply board 210 and the direct current power supply board 220 to output stable direct current, the transformer is not used for converting the input and output of the input power supply 100, the damage to the devices of the power supply circuit caused by the condition that the voltage of the power grid fluctuates can be effectively avoided, and the safety of the devices in the power supply circuit is effectively protected.

Referring to fig. 1, in one embodiment of the present utility model, the loss unit 300 may include, but is not limited to, a disconnector, a load switch, a circuit breaker, a contactor, a relay, and a power unit. For example, the loss cell 300 may include one of a disconnector, a load switch, a circuit breaker, a contactor, a relay, and a power cell. The loss cell 300 may also include a plurality of disconnectors, load switches, circuit breakers, contactors, relays, power units. The loss element 300 may be electrically connected to the output of the ac power supply 210 and/or the dc power supply 220. For example, an output of the ac power board 210 may be electrically connected to at least one of the loss cells 300, and an output of the dc power board 220 is not electrically connected to the loss cell 300. For another example, the output terminal of the ac power board 210 is not electrically connected to the loss unit 300, and the output terminal of the dc power board 220 may be electrically connected to at least one loss unit 300. For another example, the output terminal of the ac power board 210 may be electrically connected to the at least one loss cell 300, and the output terminal of the dc power board 220 may also be electrically connected to the at least one loss cell 300. The magnitude of the dc voltage at the input end of the loss unit 300 may be designed according to the actual power requirement of the loss unit 300, for example, the dc voltage may include dc 220V voltage, dc 110V voltage, dc 48V voltage, dc 24V voltage, and dc 12V voltage.

Referring to fig. 1 and 2, in an embodiment of the present utility model, the power supply circuit may further include a fan unit 700. The blower unit 700 may radiate heat of internal devices of the power supply circuit, protecting the internal devices of the power supply circuit. The number of blower units 700 may be at least one. The blower unit 700 may be located in the loss unit 300 or may be directly electrically connected to the power board unit 200. When the blower unit 700 is located in the loss unit 300, at least one blower unit 700 may be included in the loss unit 300. When the blower unit 700 is electrically connected to the power panel unit 200, the blower unit 700 may be electrically connected to the output of the ac power panel 210 and/or the dc power panel 220. For example, an output of the ac power board 210 may be electrically connected to at least one blower unit 700, and an output of the dc power board 220 is not electrically connected to the blower unit 700. For another example, the output of the ac power board 210 is not electrically connected to the blower units 700, and the output of the dc power board 220 may be electrically connected to at least one blower unit 700. For another example, an output of the ac power board 210 may be electrically connected to the at least one blower unit 700, and an output of the dc power board 220 may also be electrically connected to the at least one blower unit 700. When the fan unit 700 is not in the loss unit, the dc voltage at the output end of the power board unit 200 may be designed according to the actual power requirements of the fan unit 700 and the loss unit 300. For example, the dc voltage may include a dc 220V voltage, a dc 110V voltage, a dc 48V voltage, a dc 24V voltage, a dc 12V voltage, and the like. That is, the power panel unit 200 may output direct current of different voltages based on the actual power of the loss unit 300 and the blower unit 700, and thus the load power of the power panel unit 200 can be reduced.

Referring to fig. 1 and 2, in one embodiment of the present utility model, in order to improve the flexibility of load configuration of a power supply circuit, the input voltages of different fan units 700 may be configured according to the actual power. In order to reduce the load power and cost of the power panel unit 200, the operation logic of the fan unit 700 and the loss unit 300 may be controlled, for example, the fan unit 700 and the loss unit 300 may be controlled in a time-sharing manner. For example, when no voltage of the dc power supply 120 is input at night, the power supply circuit may disconnect the power connection between the loss unit 300 and the dc power supply 120, so as to realize low power standby and reduce actual load loss.

Referring to fig. 1, in an embodiment of the present utility model, the switch unit 400 may be electrically connected between the power panel unit 200 and the control unit 500, so as to select the ac power panel 110 or the dc power panel 120 for supplying power. The switching unit 400 may be a diode. Diodes may be electrically connected between the ac power supply board 110 and the control unit 500, and diodes may also be electrically connected between the dc power supply board 120 and the control unit 500. Specifically, the output terminal of the ac power board 210 may be electrically connected to the input terminal of at least one diode. For example, when the output end of the ac power board 210 is electrically connected to the input ends of a plurality of diodes, the plurality of diodes may be arranged in parallel, and at this time, when one of the diodes fails to cause an open circuit, the remaining diodes may operate normally, thereby improving the stability of the power supply circuit. An output terminal of the dc power board 220 may be electrically connected to an input terminal of at least one diode. For example, when the output end of the direct current power panel is electrically connected with the input ends of a plurality of diodes, the plurality of diodes can be arranged in parallel, and at the moment, when one of the diodes breaks down to cause disconnection, the rest of diodes can work normally, so that the stability of the power supply circuit is improved. The output of the diode on ac power board 210 is electrically connected to the output of the diode on dc power board 220. The diode can prevent the current backflow of the circuit, can protect the internal devices of the power supply circuit and improve the isolation strength.

Referring to fig. 1, in one embodiment of the present utility model, regardless of whether the input power source 100 of the power supply circuit is an ac power source 110 or a dc power source 120, the overall power supply apparatus needs to satisfy start and stop functions, control functions for the photovoltaic inverter or PCS, and control functions for other functional units, which are implemented by the control unit 500. Meanwhile, logic and programming control of the control unit 500 may be implemented through the interface unit 600. Therefore, both the control unit 500 and the interface unit 600 need to maintain the power input in different situations. Therefore, the output terminals of the diodes on the same power board unit 200 are electrically connected to the corresponding control unit 500 at the same time, i.e. in the same power board unit 200, the output terminals of the diodes on the ac power board 210 are electrically connected to the output terminals of the diodes on the dc power board 220. The outputs of all diodes are electrically connected to interface unit 600 at the same time. The diodes on the same power board unit 200 are arranged on the opposite sides, and direct current output by the power board unit 200 supplies power to the control unit 500 and the interface unit 600 through the diodes, so that the power failure risk of the control unit 500 and the interface unit 600 can be reduced, and the reliability of the control unit 500 and the interface unit 600 can be improved.

Referring to fig. 1, in an embodiment of the present utility model, the control unit 500 may also control the operation state of the loss unit 300, for example, may switch the operation state of a disconnecting switch, a load switch, a circuit breaker, a contactor, a relay, a power unit, etc. in the loss unit 300, switch a device in the loss unit 300 from a connected state to a disconnected state, or switch a device in the loss unit 300 from a disconnected state to a connected state. Of course, the control unit 500 may also control the operations of the ac power supply 210 and the dc power supply 220. Dc power supply board 210 is operated to supply dc power, and dc power supply board 220 is not operated as an example. The control unit 500 may detect the operating temperature of the ac power panel 210, and after detecting that the operating temperature of the ac power panel 210 reaches a preset temperature threshold, it may indicate that the temperature of the ac power panel 210 is too high, and it is necessary to switch the ac power panel, and provide dc power by using the dc power panel 220. At this time, the control unit 500 may switch the ac power supply board 210 from the dc power supply board 220, so that the ac power supply board 210 stops working, and the dc power supply board 220 starts working and provides dc power. Of course, the control unit 500 may also switch the operations of the ac power panel 210 and the dc power panel 220 by other conditions, and the specific control manner of the control unit 500 may be set according to the actual requirement, and the control unit 500 may control the ac power panel 210 and/or the dc power panel 220 to provide dc power.

Referring to fig. 1, in one embodiment of the present utility model, the interface unit 600 may employ a human-machine interface, which is an interface of input/output devices for establishing contact between a person and a computer and exchanging information, and the input/output devices may include a keyboard, a display, a printer, a mouse, and the like. The control unit 500 may be further controlled by the interface unit 600 through a man-machine interaction manner. Referring to fig. 3, in an embodiment of the utility model, when the number of photovoltaic inverters or energy storage converters is plural, for example, the number of power panel units 200 is plural. The number of power panel units 200 is exemplified as a plurality. At this time, the number of the loss units 300 and the switching units 400 may be twice the number of the power panel units 200, the number of the control units 500 may be the same as the power panel units 200, and the number of the interface units 600 may be maintained to be one. The input terminal of each power board unit 200 may be electrically connected to the input power 100 at this time. The output terminal of the power panel unit 200 may be electrically connected to the corresponding loss unit 300. The output terminal of the power panel unit 200 may also be electrically connected to the input terminal of the switching unit 400. The output terminal of the switching unit 400 may be electrically connected to the corresponding control unit 500. The output terminals of all the switching units 400 may be electrically connected to the interface unit 600 after being connected in parallel. Logic and programming control of all control units 500 may be implemented by one interface unit 600. The power supply circuit may include a plurality of stand-alone structures, each of which may include the power panel unit 200, the loss unit 300, the switching unit 400, and the control unit 500. Each of the stand-alone structures may supply power to the corresponding control unit 500, and a plurality of stand-alone structures may supply power to the interface unit 600 in common.

Referring to fig. 4 and fig. 5, the present utility model further provides an optical storage system 900, where the optical storage system 900 may include an electrical device 800, and the electrical device 800 may be a photovoltaic inverter or an energy storage converter. The optical storage system 900 may be a power generation system comprised of a photovoltaic system and/or an energy storage system. For photovoltaic systems, the interior may include photovoltaic modules, photovoltaic inverters, and grid/loads. For an energy storage system, the interior may include an energy storage battery, an energy storage converter, and a grid/load.

Therefore, in the scheme, the transformer does not exist in the power supply circuit, so that the situations of overvoltage failure of the transformer, overvoltage failure of a switch action loop, undervoltage non-action and the like cannot be generated. The loss unit is connected with the power panel unit, and the power panel unit can output stable direct current, so that the influence of voltage fluctuation of a power grid on internal devices of the power supply circuit system can be avoided, the internal devices of the power supply circuit are effectively protected, and the power supply control and power supply support of the photovoltaic inverter and the energy storage converter under all functional working conditions can be met. The loss unit can be disconnected, so that the power consumption of the power supply circuit is reduced, the flexibility of load configuration is improved, and the load power is reduced.

In the description of the present specification, the descriptions of the terms "present embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the utility model disclosed above are intended only to help illustrate the utility model. The examples are not intended to be exhaustive or to limit the utility model to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims (12)

1. A power supply circuit, comprising:

the power panel unit comprises an alternating current power panel and a direct current power panel which are respectively and electrically connected with an input power supply and used for outputting direct current;

the loss unit is electrically connected with the alternating current power supply board and the direct current power supply board respectively;

the control unit is electrically connected with the output ends of the alternating current power supply board and the direct current power supply board and used for controlling the running state of the loss unit; and

and the switch unit is electrically connected between the power panel unit and the control unit.

2. The power supply circuit of claim 1, wherein the ac power source is electrically connected to an ac power source of the input power source and the dc power source is electrically connected to a dc power source of the input power source.

3. The power supply circuit of claim 1, further comprising an interface unit electrically connected to an output of the switch unit, the interface unit employing a human-machine interface.

4. The power supply circuit according to claim 1, wherein the switching unit is a diode, the diode is electrically connected between the ac power board and the control unit, the diode is electrically connected between the dc power board and the control unit, and the diode is used for preventing current reverse-flowing in the circuit.

5. The power supply circuit of claim 1, further comprising a blower unit located within the loss unit, the loss unit being electrically connected to an output of the ac power board and/or the dc power board.

6. The power supply circuit according to claim 1, further comprising a blower unit electrically connected to an output of the ac power board and/or the dc power board.

7. The power supply circuit according to claim 1, wherein the number of the power board units is at least one, and the loss unit, the control unit, and the switching unit correspond to the power board units, respectively.

8. The power supply circuit according to claim 4, wherein the output terminals of the switch units on the same power board unit are electrically connected to the corresponding control units, and the output terminals of all the switch units are electrically connected to an interface unit.

9. The power supply circuit according to claim 1, wherein the power board unit outputs different direct currents based on the loss unit and/or the fan unit.

10. An electrical device, characterized in that it comprises a power supply circuit according to any one of claims 1 to 9.

11. The electrical device of claim 10, wherein the electrical device is a photovoltaic inverter or an energy storage converter.

12. A light storage system, characterized in that it comprises an electrical device as claimed in claim 11.