CN222127921U - Auxiliary power circuit and light Chu Bianliu device - Google Patents
Auxiliary power circuit and light Chu Bianliu device Download PDFInfo
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- CN222127921U CN222127921U CN202420613461.5U CN202420613461U CN222127921U CN 222127921 U CN222127921 U CN 222127921U CN 202420613461 U CN202420613461 U CN 202420613461U CN 222127921 U CN222127921 U CN 222127921U
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Abstract
The utility model discloses an auxiliary power supply circuit and an optical Chu Bianliu device, wherein the auxiliary power supply circuit comprises an alternating current auxiliary power supply module, a power supply input circuit, a direct current bus power supply and/or a direct current power supply, wherein the input end of the alternating current auxiliary power supply module is connected with an alternating current power grid, an alternating current power supply output by the alternating current power grid is converted into a direct current power supply with preset voltage, the power supply input circuit is connected with the direct current bus power supply and/or the direct current power supply, the input end of the direct current auxiliary power supply module is connected with the power supply input circuit, the output end of the alternating current auxiliary power supply module is connected with the input end of the power supply input circuit, the output end of the direct current auxiliary power supply module is used for being connected with a first electric device, the alternating current auxiliary power supply module is configured to output the direct current power supply to the direct current auxiliary power supply module through the power supply input circuit when the voltage of the direct current bus power supply is lower than the voltage of the direct current power supply, and the direct current auxiliary power supply module outputs a first driving voltage to the first electric device after the direct current bus power supply or the direct current power supply is converted. The utility model aims to flexibly set the threshold value of the direct current bus power supply for supplying power to the auxiliary power supply.
Description
Technical Field
The utility model relates to the field of auxiliary power supplies, in particular to an auxiliary power supply circuit and an optical storage converter.
Background
The prior auxiliary power supply scheme of the light Chu Bianliu device mainly comprises an input opposite-top auxiliary power supply scheme and an output opposite-top double auxiliary power supply scheme, wherein the input opposite-top auxiliary power supply scheme is that alternating-current phase voltage is opposite to bus voltage after being output by an uncontrolled rectifying circuit, and is input to a direct-current auxiliary power supply, and the direct-current auxiliary power supply provides multiple paths of power supplies required by a system. The scheme of the output opposite-top auxiliary power supply is that a direct-current auxiliary power supply takes power from a direct-current bus, an alternating-current auxiliary power supply takes power from one-phase voltage of a power grid, and the two outputs are respectively opposite-top through a forward diode to obtain a multi-path power supply.
The main disadvantage of the auxiliary power supply scheme with opposite inputs is that the voltage obtained after uncontrolled rectification is basically fixed, when the bus voltage is greater than the rectified voltage, the auxiliary power supply input is a direct current bus, the threshold value of the bus voltage power supply is difficult to design, and the threshold value is influenced by the power grid voltage. The main disadvantage of the auxiliary power supply scheme with opposite output is that two groups of auxiliary power supplies are needed, the power of the alternating current auxiliary power supply is large, the overall efficiency of the auxiliary power supply is reduced, and the overall cost is increased.
Disclosure of utility model
The utility model mainly aims to provide an auxiliary power supply circuit and an optical Chu Bianliu device, which aim to flexibly set a threshold value of a direct current bus power supply for supplying power to an auxiliary power supply.
In order to achieve the above object, an auxiliary power circuit according to the present utility model is applied to an optical Chu Bianliu device, the optical Chu Bianliu device having an electrical device, the auxiliary power circuit comprising:
The system comprises an alternating-current auxiliary power supply module, an alternating-current power supply module and a control module, wherein the input end of the alternating-current auxiliary power supply module is connected with an alternating-current power grid;
the power input circuit is used for being connected with a direct current bus power supply and/or the direct current power supply;
the power supply comprises a power supply input circuit, a DC auxiliary power supply module, an output end of the DC auxiliary power supply module, a first driving voltage and a first driving voltage, wherein the input end of the DC auxiliary power supply module is connected with the power supply input circuit, the output end of the AC auxiliary power supply module is connected with the input end of the power supply input circuit, the output end of the DC auxiliary power supply module is used for being connected with a first electric device, the AC auxiliary power supply module is configured to output the DC power supply to the DC auxiliary power supply module through the power supply input circuit when the voltage of the DC bus power supply is lower than the voltage of the DC power supply, and the DC auxiliary power supply module is used for converting the DC bus power supply or the DC power supply and then outputting the first driving voltage to the first electric device.
Optionally, the power input circuit includes:
the power input end is used for being connected with a direct current bus power supply and/or a direct current power supply;
The first isolation circuit is arranged between the input end of the direct current auxiliary power supply module, the output end of the alternating current auxiliary power supply module and the power supply input end, and is used for isolating the direct current power supply and the direct current bus power supply.
Optionally, the dc auxiliary power module includes a positive input terminal and a negative input terminal, and the first isolation circuit includes:
The first unidirectional conduction element is arranged between the power input end and the positive electrode input end and is used for outputting the direct current bus power supply to the positive electrode input end in a unidirectional manner;
The second unidirectional conduction element is arranged between the alternating current auxiliary power supply module and the positive electrode input end, and is used for outputting the direct current power supply output by the alternating current auxiliary power supply module to the positive electrode input end in a unidirectional manner;
The third unidirectional conduction element is arranged between the power input end and the negative electrode input end and is used for outputting the direct current bus power supply to the negative electrode input end in a unidirectional manner;
The fourth unidirectional conduction element is arranged between the alternating current auxiliary power supply module and the negative electrode input end, and is used for outputting the direct current power supply output by the alternating current auxiliary power supply module to the negative electrode input end in a unidirectional manner.
Optionally, the dc auxiliary power module is configured to output a second driving voltage to the second electrical device, and the ac auxiliary power module is configured to output a third driving voltage to the second electrical device, and the auxiliary power circuit further includes:
The second isolation circuit is arranged between the output end of the direct current auxiliary power supply module, the output end of the alternating current auxiliary power supply module and the input end of the second power utilization device and is used for isolating the output voltage of the alternating current auxiliary power supply module and the output voltage of the direct current auxiliary power supply module.
Optionally, the second isolation circuit includes:
The fifth unidirectional conduction element is arranged between the direct-current auxiliary power supply module and the second electric device and is used for outputting the power supply signal output by the direct-current auxiliary power supply module to the second electric device in a unidirectional manner;
The sixth unidirectional conduction element is arranged between the alternating current auxiliary power supply module and the second electric device, and is used for outputting the power supply signal output by the alternating current auxiliary power supply module to the second electric device in a unidirectional manner.
The utility model also proposes an optical Chu Bianliu device comprising:
The input end of the inverter circuit is used for being connected with a direct current bus power supply, and the inverter circuit is used for inverting the direct current bus power supply into alternating current voltage and outputting the alternating current voltage;
The first connecting end of the first switching circuit is connected with the output end of the inverter circuit, the second connecting end of the first switching circuit is used for being connected with a load, and the third connecting end of the first switching circuit is used for being connected with an alternating current power grid;
The control device is used for receiving a switch control signal and controlling the first switch circuit to act according to the switch control signal so as to control the electric connection between the inverter circuit and any one of a load and an alternating current power grid;
electrical consumer device, and
In the auxiliary power supply circuit, the output ends of the direct current auxiliary power supply module and the alternating current auxiliary power supply module are respectively connected with the electric appliance.
Optionally, the first switching circuit includes:
the output end of the control device is connected with the controlled end of the off-grid relay, the output end of the control device is also connected with the controlled end of the on-grid relay, the inverter circuit is connected with a load through the off-grid relay, and the inverter circuit is connected with an alternating current power grid through the on-grid relay;
The control device is also used for controlling the off-grid relay to be connected or disconnected with the electric connection between the inverter circuit and the load according to a switch control signal;
the control device is also used for controlling the grid-connected relay to conduct or break the electric connection between the inverter circuit and the alternating current power grid according to the switch control signal.
Optionally, the light Chu Bianliu further includes:
The first connecting end of the second switching circuit is connected with the alternating current power grid, and the second connecting end of the second switching circuit is connected with the load;
The output end of the control device is also connected with the controlled end of the second switch circuit, and the control device is also used for controlling the second switch circuit to act according to the switch control signal so as to control the electric connection between the load and the alternating current power grid.
Optionally, the second switching circuit includes:
The controlled end of the bypass relay is connected with the output end of the control device, the bypass relay is arranged between the load and the alternating current power grid, the control device is also used for controlling the bypass relay to conduct or break the electric connection between the alternating current power grid and the load according to the switch control signal.
Optionally, the light Chu Bianliu further includes:
The input end of the filter circuit is connected with the output end of the inverter circuit, the output end of the filter circuit is used for being connected with the alternating current power grid, the output end of the filter circuit is also used for being connected with a load, and the filter circuit is used for filtering the alternating current voltage output by the inverter circuit and outputting the filtered alternating current voltage to one of the alternating current power grid and the load.
The technical scheme includes that the auxiliary power supply circuit is formed by a power supply input circuit, a direct-current auxiliary power supply module and an alternating-current auxiliary power supply module, wherein the power supply input circuit is used for being connected with a direct-current bus power supply and/or the direct-current power supply, the input end of the alternating-current auxiliary power supply module is connected with an alternating-current power grid, the output end of the alternating-current auxiliary power supply module is connected with an electric device, the alternating-current auxiliary power supply module is used for converting alternating-current power supplied by the alternating-current power grid into direct-current power supply with preset voltage, the input end of the direct-current auxiliary power supply module is connected with the power supply input circuit, the output end of the alternating-current auxiliary power supply module is connected with the input end of the power supply input circuit, the output end of the direct-current auxiliary power supply module is used for being connected with a first electric device, the alternating-current auxiliary power supply module is configured to output the direct-current auxiliary power supply through the power supply input circuit when the voltage of the direct-current bus power supply is lower than the voltage of the direct-current power supply, and the direct-current auxiliary power supply module is used for outputting the direct-current bus power supply or the direct-current power supply after being converted to the first electric device. The auxiliary power supply circuit in the scheme performs load distribution on the direct-current auxiliary power supply module and the alternating-current auxiliary power supply module, the direct-current auxiliary power supply module is used as a main power supply of the light Chu Bianliu device, the alternating-current auxiliary power supply module is used as a standby power supply, the threshold value of the direct-current bus power supply for supplying power to the auxiliary power supply can be flexibly set, and the design requirement of the alternating-current auxiliary power supply module is reduced. The utility model aims to flexibly set the threshold value of the direct current bus power supply for supplying power to the auxiliary power supply.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a functional module of an embodiment of an auxiliary power circuit of the present utility model;
FIG. 2 is a schematic diagram of a functional module of another embodiment of the auxiliary power circuit of the present utility model;
fig. 3 is a schematic diagram of a functional module of an embodiment of the optical Chu Bianliu device of the present utility model.
Reference numerals illustrate:
| Reference numerals | Name of the name | Reference numerals | Name of the name |
| 10 | Power input circuit | 50 | Off-network relay |
| 20 | DC auxiliary power module | 60 | Grid-connected relay |
| 30 | AC auxiliary power module | 70 | Bypass relay |
| 40 | Inverter circuit | 80 | Filtering circuit |
| 90 | Control device | D4 | Fourth unidirectional conductive element |
| D1 | First unidirectional conductive element | D5 | Fifth unidirectional conductive element |
| D2 | Second unidirectional conductive element | D6 | Sixth unidirectional conductive element |
| D3 | Third unidirectional conductive element |
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. 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, if directional indications (such as up, down, left, right, front, and rear are referred to in the embodiments of the present utility model), the directional indications are merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The light Chu Bianliu device is a device integrating the solar photovoltaic power generation and energy storage functions. The solar photovoltaic panel is mainly used for converting direct-current electric energy collected by the solar photovoltaic panel into alternating-current electric energy and supplying the alternating-current electric energy to a power grid or for self-use. At the same time, the light Chu Bianliu may also store excess electrical energy into the battery for use during night or grid outages. The light Chu Bianliu has electrical devices and therefore typically requires an auxiliary power source to provide the electrical power required for operation, including but not limited to the following:
The control circuit and the logic circuit are used for monitoring and controlling functions of photovoltaic power generation, energy storage, power grid interconnection and the like.
The inverter and the frequency converter in the light Chu Bianliu device are core components for converting direct current electric energy into alternating current electric energy.
The communication module, the optical storage converter, is generally provided with the capability of communicating with a monitoring system or an intelligent energy management system.
Control panel and display screen the optical storage converter is typically equipped with a control panel and display screen for operating and monitoring the operating state of the system. Protection and safety devices the inside of the light Chu Bianliu device also contains various protection and safety devices, such as overload protection, short-circuit protection, overvoltage protection, etc.
The auxiliary power supply scheme in the existing light Chu Bianliu device is usually an input opposite-top auxiliary power supply scheme and an output opposite-top double auxiliary power supply scheme, and the main defects of the input opposite-top auxiliary power supply scheme are that the voltage obtained after uncontrolled rectification is basically fixed, when the bus voltage is larger than the rectified voltage, the auxiliary power supply input is a direct current bus, the threshold value of the bus voltage power supply is difficult to design, and the threshold value is influenced by the power grid voltage. The main disadvantage of the auxiliary power supply scheme with opposite output is that two groups of auxiliary power supplies are needed, the power of the alternating current auxiliary power supply is large, the overall efficiency of the auxiliary power supply is reduced, and the overall cost is increased.
In order to solve the above-mentioned problems in the auxiliary power scheme, the present utility model provides an auxiliary power circuit applicable to the above-mentioned light Chu Bianliu.
Referring to fig. 1, in an embodiment of the present utility model, the auxiliary power circuit includes:
The alternating-current auxiliary power supply module 30 is used for converting an alternating-current power supply output by the alternating-current power grid into a direct-current power supply with preset voltage;
the power input circuit 10 is used for connecting a direct current bus power supply and/or the direct current power supply;
The direct current auxiliary power supply module 20, wherein the input end of the direct current auxiliary power supply module 20 is connected with the power input circuit 10, the output end of the alternating current auxiliary power supply module 30 is connected with the input end of the power input circuit 10, the output end of the direct current auxiliary power supply module 20 is used for being connected with a first electric device, the alternating current auxiliary power supply module 30 is configured to output the direct current power supply to the direct current auxiliary power supply module 20 through the power input circuit 10 when the voltage of the direct current bus power supply is lower than the voltage of the direct current power supply, and the direct current auxiliary power supply module 20 is used for converting the direct current bus power supply or the direct current power supply and then outputting a first driving voltage to the first electric device.
In this embodiment, the dc auxiliary power module 20 may be composed of electronic components such as resistors, capacitors, windings, and switching transistors, and the specific circuit structure may be set according to practical situations. The dc auxiliary power module 20 can convert the dc bus power into a dc power with a corresponding voltage to provide a proper working voltage for the electric devices in the light Chu Bianliu device, so as to ensure the normal operation of the light Chu Bianliu device.
The ac auxiliary power module 30 may also be composed of electronic components such as resistors, capacitors, windings, and switching transistors, and the specific circuit configuration may be set according to actual situations. The ac auxiliary power module 30 is configured to convert an ac power source of the ac power grid into a dc power source with a corresponding voltage, and output the dc power source to the dc auxiliary power module 20. The ac power grid to which the ac auxiliary power module 30 is connected may specifically be any one-phase voltage of a three-phase four-wire grid. The dc bus power to which the power input circuit 10 is connected may be one of a photovoltaic string and an energy storage battery.
It can be understood that, in order to solve the problem that the voltage obtained after uncontrolled rectification is basically fixed in the current input opposite-top auxiliary power scheme and the problem that the output opposite-top auxiliary power scheme needs two groups of auxiliary power, the power of the AC auxiliary power is larger, and the overall efficiency of the auxiliary power is reduced, the AC auxiliary power module 30 in the scheme can be provided with a voltage conversion circuit, and after the AC power output by the AC power grid is converted into a DC power with a preset voltage, the DC power is output to the DC auxiliary power module 20, the voltage conversion circuit can be specifically provided with a flyback conversion circuit or other AC-DC voltage conversion circuits, and the preset voltage can also be set according to the user requirement. The ac auxiliary power module 30 in this embodiment can control the output dc power voltage, and the ac auxiliary power module 30 outputs dc power to the dc auxiliary power module 20. Further, in this embodiment, the dc power supply voltage output by the ac auxiliary power supply module 30 may be set to be smaller than the dc bus power supply voltage, so that the dc auxiliary power supply module 20 is used as the main power supply of the system, the ac auxiliary power supply module 30 is used as the standby power supply, and the power of the ac auxiliary power supply module 30 is reduced. Thus, when the power input circuit 10 has a dc bus power or a dc bus power and a dc power, the dc auxiliary power module 20 converts the dc bus power and outputs the converted dc bus power to the first electric device. When the power input circuit 10 has no dc bus power, but has a dc power, the dc auxiliary power module 20 may convert the dc power output from the ac auxiliary power module 30 and output the converted dc power to the first electric device, where the first electric device may be a control circuit, a logic circuit, a communication module, and the like. The ac auxiliary power module 30 in this embodiment is further configured to output dc power to the dc auxiliary power module 20 when the voltage of the dc bus power is lower than the voltage of the dc power, so that only one set of auxiliary power with higher voltage is needed to supply the load during actual operation, which can solve the problem that two sets of auxiliary power are needed for outputting the opposite auxiliary power scheme and the ac auxiliary power is higher. In this way, the power required by the ac auxiliary power module 30 in this scheme is smaller, so that the overall efficiency of the auxiliary power is improved, and load distribution can be performed on the dc auxiliary power module 20 and the ac auxiliary power module 30.
The technical scheme of the utility model comprises a power input circuit 10, a direct current auxiliary power module 20 and an alternating current auxiliary power module 30, wherein the power input circuit 10 is used for being connected with a direct current bus power supply and/or the direct current power supply, the input end of the alternating current auxiliary power module 30 is connected with an alternating current power grid, the output end of the alternating current auxiliary power module 30 is connected with an electric device, the alternating current auxiliary power module 30 is used for converting an alternating current power supply output by the alternating current power grid into a direct current power supply with preset voltage, the input end of the direct current auxiliary power module 20 is connected with the power input circuit 10, the output end of the alternating current auxiliary power module 30 is connected with the input end of the power input circuit 10, the output end of the direct current auxiliary power module 20 is used for being connected with a first electric device, the alternating current auxiliary power module 30 is configured to output the direct current power supply to the direct current auxiliary power module 20 through the power input circuit when the voltage of the direct current bus power supply is lower than the voltage of the direct current power supply, and the direct current auxiliary power module 20 is used for outputting the direct current bus power supply or the direct current power supply after being converted to the first electric device. The auxiliary power supply circuit in the scheme performs load distribution on the direct-current auxiliary power supply module 20 and the alternating-current auxiliary power supply module 30, the direct-current auxiliary power supply module 20 is used as a main power supply of the light Chu Bianliu device, the alternating-current auxiliary power supply module 30 is used as a standby power supply, the threshold value of the direct-current bus power supply for supplying power to the auxiliary power supply can be flexibly set, and the design requirement of the alternating-current auxiliary power supply module 30 is reduced. The utility model aims to flexibly set the threshold value of the direct current bus power supply for supplying power to the auxiliary power supply.
Referring to fig. 1 to 2, in an embodiment, the power input circuit 10 includes:
the power input end is used for being connected with a direct current bus power supply and/or a direct current power supply;
The first isolation circuit is disposed between the input end of the dc auxiliary power module 20, the output end of the ac auxiliary power module 30, and the power input end, and is used for isolating the dc power source from the dc bus power source.
In this embodiment, the power input circuit 10 may be formed by a power input terminal and a first isolation circuit, and the isolation circuit may be formed by an isolation device such as a diode. Since the input end of the dc auxiliary power module 20 is connected to the dc bus power and the dc power through the power input end, the voltage value of the dc bus power is different from the dc power voltage value output by the ac auxiliary power module 30. Therefore, the first isolation circuit is arranged between the input end of the dc auxiliary power module 20, the output end of the ac auxiliary power module 30 and the power input end for isolation, so that the dc bus power connected to the power input end can be prevented from flowing into the ac auxiliary power module 30 or the dc power output by the ac auxiliary power module 30 is output to the dc bus through the power input end, for example, the unidirectional conduction characteristic of the diode, and the isolation effect can be realized, thereby ensuring the normal operation of the auxiliary power circuit.
Referring to fig. 1 to 2, in an embodiment, the dc auxiliary power module 20 includes a positive input terminal and a negative input terminal, and the first isolation circuit includes:
The first unidirectional conduction element D1 is arranged between the power input end and the positive electrode input end, and the first unidirectional conduction element D1 is used for outputting the direct current bus power supply to the positive electrode input end in a unidirectional manner;
The second unidirectional conduction element D2 is disposed between the ac auxiliary power module 30 and the positive input terminal, and the second unidirectional conduction element D2 is used for unidirectional output of the dc power output by the ac auxiliary power module 30 to the positive input terminal;
the third unidirectional conduction element D3 is arranged between the power input end and the negative electrode input end, and the third unidirectional conduction element D3 is used for outputting the direct current bus power supply to the negative electrode input end in a unidirectional manner;
the fourth unidirectional conduction element D4 is disposed between the ac auxiliary power module 30 and the negative input terminal, and the fourth unidirectional conduction element D4 is used for unidirectional output of the dc power output by the ac auxiliary power module 30 to the negative input terminal.
In this embodiment, the second isolation circuit may be composed of a first unidirectional conduction element D1, a second unidirectional conduction element D2, a third unidirectional conduction element D3, and a fourth unidirectional conduction element D4, where the unidirectional conduction elements may be specifically an isolation device such as a diode, or may be a MOS transistor or a triode, where the MOS transistor is turned on when a forward voltage is applied between the gate and the source, and turned off when a reverse voltage is applied, and although the triode is generally used to amplify a signal, the triode may also be used as a unidirectional conduction element in a specific configuration. For example, a normal NPN transistor turns on when forward biased and blocks when reverse biased. It will be appreciated that the dc bus power supply includes an anode and a cathode, so that the dc auxiliary power module 20 is provided with an anode input end and a cathode input end, the first unidirectional conductive element D1 and the second unidirectional conductive element D2 are respectively disposed between the anode of the dc bus power supply and the anode input end of the ac auxiliary power module 30, the third unidirectional conductive element D3 and the fourth unidirectional conductive element D4 are respectively disposed between the cathode of the dc bus power supply and the anode input end of the ac auxiliary power module 30, and thus, the dc bus power supply voltage can be prevented from flowing into the ac auxiliary power module 30 or the power supply voltage output by the ac auxiliary power module 30 flows into the dc bus.
Referring to fig. 1 to 2, in an embodiment, the dc auxiliary power module 20 is configured to output a second driving voltage to a second electric device, the ac auxiliary power module 30 is configured to output a third driving voltage to the second electric device, and the auxiliary power circuit further includes:
The second isolation circuit is disposed between the output end of the dc auxiliary power module 20, the output end of the ac auxiliary power module 30, and the input end of the second power device, and is used for isolating the output voltage of the ac auxiliary power module 30 from the output voltage of the dc auxiliary power module 20.
In this embodiment, the dc auxiliary power module 20 and the ac auxiliary power module 30 can both output voltages to the second power device, and the power device can be a switching element of a control circuit or a logic circuit, or a controller in the light Chu Bianliu, for example, the controller is a core control device in the light Chu Bianliu, so that stable power supply needs to be ensured, and the output ends of the dc auxiliary power module 20 and the ac auxiliary power module 30 and the second power device can keep stable power supply to the controller, so long as one power circuit is powered, the working voltage can be provided for the controller, so that the light storage converter works normally.
It can be understood that in this embodiment, the dc auxiliary power module 20 is used as the main power source of the light Chu Bianliu, the ac auxiliary power module 30 is used as the standby power source, and in this embodiment, the voltage value of the second driving voltage output by the dc auxiliary power module 20 may be set to be lower than the voltage value of the third driving voltage output by the ac auxiliary power module 30. Since the overall power of the dc auxiliary power module 20 is smaller than the overall power of the ac auxiliary power module 30 during operation, the ac auxiliary power module 30 is enabled to preferentially output the third driving voltage with the higher voltage value to the second power device in the embodiment, so that the overall power of the dc auxiliary power module 20 is prevented from being increased, and the overall power of the auxiliary power circuit is prevented from being increased. The first isolation circuit is arranged among the output end of the direct current auxiliary power supply module 20, the output end of the alternating current auxiliary power supply module 30 and the input end of the electric device, so that the direct current auxiliary power supply module 20 and the alternating current auxiliary power supply module 30 can be isolated, high voltage output by the direct current auxiliary power supply module 20 is prevented from flowing into the alternating current auxiliary power supply module 30 or high voltage output by the alternating current auxiliary power supply module 30 flows into the direct current auxiliary power supply module 20, and normal operation of the auxiliary power supply circuit is guaranteed.
Referring to fig. 1 to 2, in an embodiment, the second isolation circuit includes:
A fifth unidirectional conductive element, disposed between the dc auxiliary power module 20 and the second electrical device, where the fifth unidirectional conductive element is used for unidirectional output of the power signal output by the dc auxiliary power module 20 to the second electrical device;
The sixth unidirectional conductive element is disposed between the ac auxiliary power module 30 and the second electrical device, and is used for unidirectional output of the power signal output by the ac auxiliary power module 30 to the second electrical device.
In this embodiment, the second isolation circuit may be formed by a fifth unidirectional conductive element and a sixth unidirectional conductive element, and the unidirectional conductive element may be specifically set with reference to the unidirectional conductive element in the first isolation circuit, which is not described herein. In this embodiment, the power signal output by the dc auxiliary power module 20 is output to the electric device in one direction through the fifth unidirectional conductive element, and the power signal output by the ac auxiliary power module 30 is output to the electric device in one direction through the sixth unidirectional conductive element, that is, through the arrangement of the opposite output, the second driving voltage output by the dc auxiliary power module 20 can be prevented from flowing into the ac auxiliary power module 30 or the third driving voltage output by the ac auxiliary power module 30 flows into the dc auxiliary power module 20, and the third driving voltage output by the ac auxiliary power module 30 can be preferentially output to the second electric device, thereby ensuring the normal operation of the auxiliary power circuit.
The utility model further provides an optical storage converter.
Referring to fig. 3, in an embodiment, the optical storage converter includes:
The input end of the inverter circuit 40 is used for being connected with a direct current bus power supply, and the inverter circuit 40 is used for inverting the direct current bus power supply into alternating current voltage and outputting the alternating current voltage;
A first switching circuit, a first connection end of which is connected with an output end of the inverter circuit 40, a second connection end of which is used for connecting a load, and a third connection end of which is used for connecting an ac power grid;
The control device 90 is used for receiving a switch control signal and controlling the first switch circuit to act according to the switch control signal so as to control the electric connection between the inverter circuit 40 and any one of a load and an alternating current power grid;
electrical consumer device, and
In the auxiliary power circuit, the output ends of the dc auxiliary power module 20 and the ac auxiliary power module 30 are respectively connected to the electric devices.
In this embodiment, the dc bus power to which the inverter circuit 40 is connected may be one of a photovoltaic string and an energy storage battery. The inverter circuit 40 may be formed by a rectifier, a filter, an inverter, a control circuit, and the like, and the inverter circuit 40 may convert the electric energy of the dc power source into the ac power source to supply the ac power to the ac power equipment or the power grid. The control device 90 may be composed of electronic components such as a controller and a resistor. The first switching circuit may then be formed by a plurality of switching elements or switching devices, such as MOS transistors or relays. The control device 90 and the switching circuit may be part of an electrical device in the light Chu Bianliu, and the control device 90 and the switching circuit may be powered by an auxiliary power circuit.
It can be understood that the external device or other detection modules in the optical Chu Bianliu device can detect whether the dc bus power supply and the ac power supply are powered, so as to output corresponding switch control signals to the control device 90, for example, the detection modules detect the voltage values or the current values of the dc bus power supply and the ac power supply and then output the switch control signals, or the detection modules can manually detect and then output the switch control signals through the external device. The control device 90 may control the first switching circuit to be turned on or off according to the switching control signal, so that the inverter circuit 40 outputs ac power to the load or the ac power grid. How to control the inverter circuit 40 to output ac power to the load or ac power grid according to whether the dc bus power supply and the ac power supply have electricity or not can be set according to the user's requirements and actual situations.
The specific structure of the auxiliary power circuit and the specific types of the electric devices in the embodiment can refer to the above embodiments, and since the light Chu Bianliu device in the embodiment adopts all the technical solutions of all the embodiments, at least the technical solutions of the embodiments have all the beneficial effects brought by the technical solutions of the embodiments, and are not repeated herein.
Referring to fig. 3, in one embodiment, the switching circuit includes:
The output end of the control device 90 is connected with the controlled end of the off-grid relay 50, the output end of the control device 90 is also connected with the controlled end of the on-grid relay 60, the inverter circuit 40 is connected with a load through the off-grid relay 50, and the inverter circuit 40 is connected with an alternating current power grid through the on-grid relay 60;
The control device 90 is further configured to control the off-grid relay 50 to switch on or off the electrical connection between the inverter circuit 40 and the load according to a switch control signal;
the control device 90 is further configured to control the grid-connected relay 60 to switch on or off the electrical connection between the inverter circuit 40 and the ac power grid according to a switch control signal.
In this embodiment, the first switching circuit may be formed by the off-grid relay 50 and the on-grid relay 60, and the control device 90 may include two output terminals connected to the controlled terminals of the off-grid relay 50 and the on-grid relay 60, respectively, so as to control the on-off of the off-grid relay 50 and the on-grid relay 60. The off-grid relay 50 is disposed between the inverter circuit 40 and the load, and the on-grid relay 60 is disposed between the inverter circuit 40 and the ac power grid, so that the control device 90 can control the off-grid relay 50 to switch on or off the electrical connection between the inverter circuit 40 and the load according to the switch control signal, and control the on-grid relay 60 to switch on or off the electrical connection between the inverter circuit 40 and the ac power grid, so that the optical storage converter is in different working modes.
Referring to fig. 3, in an embodiment, the light Chu Bianliu further includes:
The first connecting end of the second switching circuit is connected with the alternating current power grid, and the second connecting end of the second switching circuit is connected with the load;
The output end of the control device 90 is further connected to the controlled end of the second switching circuit, and the control device 90 is further configured to control the second switching circuit to act according to the switching control signal, so as to control the electrical connection between the load and the ac power grid.
In this embodiment, the light Chu Bianliu may further include a second switching circuit, and the second switching circuit may also be formed by a plurality of switching elements or switching devices, such as MOS transistors or relays. The control device 90 may control the second switching circuit to make or break the electrical connection between the load and the ac power grid in accordance with the switching control signal.
Referring to fig. 3, in an embodiment, the switching circuit further includes:
The controlled end of the bypass relay 70 is connected with the output end of the control device 90, the bypass relay 70 is arranged between the load and the ac power grid, and the control device 90 is further used for controlling the bypass relay 70 to conduct or break the electrical connection between the ac power grid and the load according to the switch control signal.
In this embodiment, the second switching circuit may include the bypass relay 70, and the output terminal of the control device 90 may be connected to the controlled terminal of the bypass relay 70 in addition to the off-grid relay 50 and the on-grid relay 60 in the above embodiment. It will be appreciated that the control device 90 may turn on or off the electrical connection between the inverter circuit 40 and the load and between the inverter circuit 40 and the ac grid by controlling the off-grid relay 50 and the on-grid relay 60 when the dc bus power supply is powered. When the dc bus power supply is powered down, the load needs to be supplied with power by the ac power grid, so the bypass relay 70 is disposed between the ac power grid and the load in this embodiment, and the control device 90 may control the bypass relay 70 to make or break the electrical connection between the ac power grid and the load.
In an embodiment, according to whether the dc bus power input by the light Chu Bianliu device has electricity or not and whether the ac power grid has electricity or not, the operation mode of the light Chu Bianliu device and the corresponding auxiliary power operating state can be divided into the following three types:
When the direct current bus power supply and the alternating current power supply are powered on or powered off, the control device 90 can receive switch control signals with different voltage values, so that the control device 90 can obtain the voltage values through the analog-to-digital conversion module, the situation that the direct current bus power supply and the alternating current power supply are powered on or powered off is detected, and the specific voltage values and the corresponding situations that the direct current bus power supply and the alternating current power supply are powered on or powered off can be set according to user requirements. When the control device 90 detects that the dc bus power supply is powered on and the ac power grid is powered on, it controls the off-grid relay 50 to be turned off and controls the on-grid relay 60 and the bypass relay 70 to be turned on, and at this time, the output voltage of the inverter circuit 40 may be output to the ac power grid through the on-grid relay 60 and output to the load through the on-grid relay 60 and the bypass relay 70. The light storage converter is in a grid-connected operation mode, in this mode, the voltage output by the ac auxiliary power module 30 to the dc auxiliary power module 20 is lower than the voltage of the dc bus power supply, the dc auxiliary power module 20 converts the dc bus power supply into a first driving voltage to supply power to the first electric device, and the third driving voltage output by the ac auxiliary power module 30 is higher than the second driving voltage output by the dc auxiliary power module 20, so that the ac auxiliary power module 30 supplies power to the second electric device.
When the control device 90 detects that the dc bus power supply is powered on and the ac power grid is powered off, the off-grid relay 50 is controlled to be closed, and the grid-connected relay 60 and the bypass relay 70 are controlled to be opened, so that the output voltage of the inverter circuit 40 can be output to the load through the off-grid relay 50. The optical storage converter is in an off-grid operation mode, and in the off-grid operation mode, the ac auxiliary power module 30 stops working due to power failure of the ac power grid, and the dc auxiliary power source normally works, outputs a first driving voltage to the first electric device and outputs a second driving voltage to the second electric device.
When the control device 90 detects that the direct current bus power supply is powered down and the alternating current power grid is powered on, the off-grid relay 50 and the grid-connected relay 60 are controlled to be opened, the bypass relay 70 is controlled to be closed, and thus the alternating current power grid outputs the alternating current power supply to a load through the bypass relay 70. The light storage converter is in a bypass mode, in the bypass mode, the direct current bus is not powered, and the alternating current power grid is powered, so that the alternating current auxiliary power supply module 30 works normally and outputs a third driving voltage to the second power utilization device, and the direct current auxiliary power supply module 20 can receive the voltage output by the alternating current auxiliary power supply module 30 and then output the first driving voltage to the first power utilization device after conversion.
Referring to fig. 3, in an embodiment, the light Chu Bianliu further includes:
the input end of the filter circuit 80 is connected with the output end of the inverter circuit 40, the output end of the filter circuit 80 is used for being connected with the ac power grid, the output end of the filter circuit 80 is also used for being connected with a load, and the filter circuit 80 is used for filtering the ac voltage output by the inverter circuit 40 and outputting the filtered ac voltage to one of the ac power grid and the load.
In this embodiment, the filter circuit 80 may be formed by electronic components such as a capacitor and an inductor, and the filter circuit 80 may remove noise, clutter and interference in the signal, so that the output signal is clearer and more stable. The filter circuit 80 may also selectively pass signals in a particular frequency range while suppressing signals of other frequencies. In addition, the filter circuit 80 may also be used as a protection circuit to limit or block signals in a particular frequency range from entering or exiting other parts of the system.
The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. An auxiliary power circuit, the auxiliary power circuit comprising:
The system comprises an alternating-current auxiliary power supply module, an alternating-current power supply module and a control module, wherein the input end of the alternating-current auxiliary power supply module is connected with an alternating-current power grid;
the power input circuit is used for being connected with a direct current bus power supply and/or the direct current power supply;
the power supply comprises a power supply input circuit, a DC auxiliary power supply module, an output end of the DC auxiliary power supply module, a first driving voltage and a first driving voltage, wherein the input end of the DC auxiliary power supply module is connected with the power supply input circuit, the output end of the AC auxiliary power supply module is connected with the input end of the power supply input circuit, the output end of the DC auxiliary power supply module is used for being connected with a first electric device, the AC auxiliary power supply module is configured to output the DC power supply to the DC auxiliary power supply module through the power supply input circuit when the voltage of the DC bus power supply is lower than the voltage of the DC power supply, and the DC auxiliary power supply module is used for converting the DC bus power supply or the DC power supply and then outputting the first driving voltage to the first electric device.
2. The auxiliary power circuit of claim 1, wherein the power input circuit comprises:
the power input end is used for being connected with a direct current bus power supply and/or a direct current power supply;
The first isolation circuit is arranged between the input end of the direct current auxiliary power supply module, the output end of the alternating current auxiliary power supply module and the power supply input end, and is used for isolating the direct current power supply and the direct current bus power supply.
3. The auxiliary power circuit of claim 2, wherein the dc auxiliary power module includes a positive input and a negative input, the first isolation circuit comprising:
The first unidirectional conduction element is arranged between the power input end and the positive electrode input end and is used for outputting the direct current bus power supply to the positive electrode input end in a unidirectional manner;
The second unidirectional conduction element is arranged between the alternating current auxiliary power supply module and the positive electrode input end, and is used for outputting the direct current power supply output by the alternating current auxiliary power supply module to the positive electrode input end in a unidirectional manner;
The third unidirectional conduction element is arranged between the power input end and the negative electrode input end and is used for outputting the direct current bus power supply to the negative electrode input end in a unidirectional manner;
The fourth unidirectional conduction element is arranged between the alternating current auxiliary power supply module and the negative electrode input end, and is used for outputting the direct current power supply output by the alternating current auxiliary power supply module to the negative electrode input end in a unidirectional manner.
4. The auxiliary power circuit of claim 1, wherein the dc auxiliary power module is configured to output a second drive voltage to a second electrical device, the ac auxiliary power module is configured to output a third drive voltage to the second electrical device, the auxiliary power circuit further comprising:
The second isolation circuit is arranged between the output end of the direct current auxiliary power supply module, the output end of the alternating current auxiliary power supply module and the input end of the second power utilization device and is used for isolating the output voltage of the alternating current auxiliary power supply module and the output voltage of the direct current auxiliary power supply module.
5. The auxiliary power circuit of claim 4, wherein the second isolation circuit comprises:
The fifth unidirectional conduction element is arranged between the direct-current auxiliary power supply module and the second electric device and is used for outputting the power supply signal output by the direct-current auxiliary power supply module to the second electric device in a unidirectional manner;
The sixth unidirectional conduction element is arranged between the alternating current auxiliary power supply module and the second electric device, and is used for outputting the power supply signal output by the alternating current auxiliary power supply module to the second electric device in a unidirectional manner.
6. A light Chu Bianliu device, comprising:
The input end of the inverter circuit is used for being connected with a direct current bus power supply, and the inverter circuit is used for inverting the direct current bus power supply into alternating current voltage and outputting the alternating current voltage;
The first connecting end of the first switching circuit is connected with the output end of the inverter circuit, the second connecting end of the first switching circuit is used for being connected with a load, and the third connecting end of the first switching circuit is used for being connected with an alternating current power grid;
The control device is used for receiving a switch control signal and controlling the first switch circuit to act according to the switch control signal so as to control the electric connection between the inverter circuit and any one of a load and an alternating current power grid;
electrical consumer device, and
The auxiliary power circuit as claimed in any one of claims 1-5, wherein the output terminals of the dc auxiliary power module and the ac auxiliary power module in the auxiliary power circuit are respectively connected to the electric devices.
7. The optical Chu Bianliu unit as defined in claim 6, wherein said first switching circuit includes:
the output end of the control device is connected with the controlled end of the off-grid relay, the output end of the control device is also connected with the controlled end of the on-grid relay, the inverter circuit is connected with a load through the off-grid relay, and the inverter circuit is connected with an alternating current power grid through the on-grid relay;
The control device is also used for controlling the off-grid relay to be connected or disconnected with the electric connection between the inverter circuit and the load according to a switch control signal;
the control device is also used for controlling the grid-connected relay to conduct or break the electric connection between the inverter circuit and the alternating current power grid according to the switch control signal.
8. The light Chu Bianliu device of claim 6, wherein the light Chu Bianliu device further comprises:
The first connecting end of the second switching circuit is connected with the alternating current power grid, and the second connecting end of the second switching circuit is connected with the load;
The output end of the control device is also connected with the controlled end of the second switch circuit, and the control device is also used for controlling the second switch circuit to act according to the switch control signal so as to control the electric connection between the load and the alternating current power grid.
9. The optical Chu Bianliu unit as defined in claim 8, wherein the second switching circuit includes:
The controlled end of the bypass relay is connected with the output end of the control device, the bypass relay is arranged between the load and the alternating current power grid, the control device is also used for controlling the bypass relay to conduct or break the electric connection between the alternating current power grid and the load according to the switch control signal.
10. The light Chu Bianliu device of claim 6, wherein the light Chu Bianliu device further comprises:
The input end of the filter circuit is connected with the output end of the inverter circuit, the output end of the filter circuit is used for being connected with the alternating current power grid, the output end of the filter circuit is also used for being connected with a load, and the filter circuit is used for filtering the alternating current voltage output by the inverter circuit and outputting the filtered alternating current voltage to one of the alternating current power grid and the load.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420613461.5U CN222127921U (en) | 2024-03-27 | 2024-03-27 | Auxiliary power circuit and light Chu Bianliu device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420613461.5U CN222127921U (en) | 2024-03-27 | 2024-03-27 | Auxiliary power circuit and light Chu Bianliu device |
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| CN222127921U true CN222127921U (en) | 2024-12-06 |
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| CN202420613461.5U Active CN222127921U (en) | 2024-03-27 | 2024-03-27 | Auxiliary power circuit and light Chu Bianliu device |
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| Country | Link |
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| CN (1) | CN222127921U (en) |
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