CN218040813U

CN218040813U - Microgrid power generation and energy storage system

Info

Publication number: CN218040813U
Application number: CN202221837698.9U
Authority: CN
Inventors: 周联群
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-15
Filing date: 2022-07-15
Publication date: 2022-12-13
Anticipated expiration: 2032-07-15

Abstract

The utility model provides a microgrid power generation and energy storage system, which comprises a control unit for controlling power generation and power supply, wherein the control unit is respectively connected with an alternating current power generation circuit, a direct current power generation circuit, a voltage stabilization charging circuit and a voltage stabilization output circuit, and the alternating current power generation circuit and the direct current power generation circuit are respectively connected with a standby battery U1 and a power supply battery U2 for charging the standby battery U1 and the power supply battery U2; the voltage stabilization output circuit comprises two voltage stabilization operational amplifier circuits used for amplifying voltage, the voltage stabilization operational amplifier circuit comprises an A1 operational amplifier which is arranged in a mode of positive input port grounding, the output end of the A1 operational amplifier is connected with the base of a Q1 triode, an R2 resistor is connected between the emitting electrode of the Q1 triode and the positive input port of the A1 operational amplifier in series, the R2 resistor is connected with a C filter capacitor in parallel, the positive input port of the Q1 triode is connected with one end of an MOS (metal oxide semiconductor) tube M9 and one end of an MOS tube M10 respectively, and the other end of the Q1 triode is connected to two ends of a power supply battery U2 respectively. The utility model discloses can provide stable electric energy for high-power load under outdoor environment.

Description

Microgrid power generation and energy storage system

Technical Field

The utility model relates to a microgrid electricity generation energy storage technical field, concretely relates to microgrid electricity generation energy storage system.

Background

The outdoor power supply is commonly used for supplying power to equipment in occasions such as outings, camping and the like, and is particularly used in epidemic situation prevention and control and outdoor rescue work. In order to ensure that under the outdoor environment, when the load power in the micro-grid is suddenly changed greatly, the bus voltage and the current cannot be quickly and effectively stabilized by using the transient action of the super capacitor. Accordingly, there is a need for an outdoor energy storage power supply circuit that can provide more stable power to a high-power load.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims to solve the problem that a microgrid electricity generation energy storage system is provided, can provide stable electric energy for high-power load under outdoor environment.

In order to solve the technical problem, the utility model discloses a technical scheme is:

a micro-grid power generation and energy storage system comprises a control unit for controlling power generation and power supply, wherein the control unit is respectively connected with an alternating current power generation circuit, a direct current power generation circuit, a voltage stabilization charging circuit and a voltage stabilization output circuit, and the alternating current power generation circuit and the direct current power generation circuit are respectively connected with a standby battery U1 and a power supply battery U2 and used for charging the standby battery U1 and the power supply battery U2;

the voltage stabilization output circuit comprises two voltage stabilization operational amplifier circuits used for amplifying voltage, the voltage stabilization operational amplifier circuit comprises an A1 operational amplifier which is arranged in a mode of positive input port grounding, the output end of the A1 operational amplifier is connected with the base of a Q1 triode, an R2 resistor is connected between the emitting electrode of the Q1 triode and the positive input port of the A1 operational amplifier in series, the R2 resistor is connected with a C filter capacitor in parallel, the positive input port of the Q1 triode is connected with one end of an MOS (metal oxide semiconductor) tube M9 and one end of an MOS tube M10 respectively, and the other end of the Q1 triode is connected to two ends of a power supply battery U2 respectively.

Further, the other voltage-stabilizing operational amplifier circuit comprises an MOS transistor M11 and an MOS transistor M12 which are respectively connected to two ends of the power supply battery U2;

and the MOS tube M11, the MOS tube M12, the MOS tube M9, the MOS tube M10 and the A1 operational amplifier are conducted or not so as to control an output alternating current circuit or a direct current circuit.

Further, the R2 resistor is a variable resistor.

9. Further, the alternating current power generation circuit comprises a generator, and the generator is sequentially connected in series with an MOS tube M1, an MOS tube M2, an MOS tube M3 and an MOS tube M4;

connect L1 filter inductance and L2 filter inductance between MOS pipe M1 and the MOS pipe M2 in proper order, the other end of L2 filter inductance connects between MOS pipe M3 and MOS pipe M4, power supply battery U2's one end is connected to between L1 filter inductance and the L2 filter inductance, and the other end connects to between MOS pipe M2 and the MOS pipe M4 for charge for power supply battery U2.

Further, MOS pipe M1 and MOS pipe M2 connect in parallel U3 battery jointly, MOS pipe M3 and MOS pipe M4 connect in parallel U4 battery jointly for storage drive electric energy.

Further, the direct current power generation circuit comprises a photovoltaic power generation device P which generates a direct current circuit, and the photovoltaic power generation device P is respectively connected with the standby battery U1 and the power supply battery U2 in parallel through a D1 diode and is used for charging the standby battery U1 and the power supply battery U2 at the same time.

Further, the voltage-stabilizing charging circuit comprises an MOS transistor M6 and an MOS transistor M7 connected in parallel with the backup battery U1. The MOS tube M6 is connected with an MOS tube M5 in series, and the MOS tube M7 is connected with an MOS tube M8 in series;

one end of a C4 capacitor is connected between the MOS tube M6 and the MOS tube M5 in parallel, and the other end of the C4 capacitor is connected between the MOS tube M7 and the MOS tube M8 and used for storing and providing supplementary electric energy.

Furthermore, the C4 capacitor is connected in series with an L5 filter inductor, and the C4 capacitor is also connected in parallel with an R1 resistor.

The utility model has the advantages and positive effects be:

through setting up the control unit that is used for controlling power generation and power supply, the control unit is connected with alternating current power generation circuit, direct current power generation circuit, steady voltage charging circuit and steady voltage output circuit respectively, gives stand-by battery U1 and power supply battery U2 through alternating current power generation circuit and direct current power generation circuit, can in time charge for the battery under extreme environment, and the voltage of output is enlargied through steady voltage output circuit simultaneously, provides stable electric energy for high-power load under outdoor environment.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a circuit diagram of an overall structure of a microgrid power generation and energy storage system according to the present invention;

fig. 2 is an ac power generation circuit diagram of a microgrid power generation and energy storage system of the present invention;

fig. 3 is a voltage-stabilizing charging circuit diagram of the microgrid power generation and energy storage system of the present invention;

fig. 4 is the utility model discloses a microgrid power generation energy storage system's steady voltage output circuit diagram.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for purposes of illustration only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model provides a microgrid electricity generation energy storage system, as shown in fig. 1 and fig. 2, including alternating current power generation unit and direct current power generation unit, alternating current power generation unit is including the generator of output alternating current, in being convenient for save the electric energy of generator output to the power supply battery U2 of large capacity, the generator concatenates MOS pipe M1 in proper order, MOS pipe M2, MOS pipe M3 and MOS pipe M4, MOS pipe M1 and MOS pipe M2 connect the U3 battery jointly, it is the same, MOS pipe M3 and MOS pipe M4 connect the U4 battery jointly, U3 battery and U4 battery all are used for saving a small amount of electric energy, U3 battery and U4 battery provide the start-up electric energy jointly when opening the generator, the convenience does not have the drive generator under the circumstances of electricity in the open air.

One end of an L1 filter inductor is connected between the MOS tube M1 and the MOS tube M2 in parallel, the L1 filter inductor is connected with one end of the L2 filter inductor, the other end of the L1 filter inductor is connected between the MOS tube M3 and the MOS tube M4, one end of a power supply battery U2 is connected between the L1 filter inductor and the L2 filter inductor, and the other end of the power supply battery U2 is connected between the MOS tube M2 and the MOS tube M4 so as to charge the power supply battery U2. The power supply battery U2 is connected with the standby battery U1 in parallel, and the generator can charge the standby battery U1 and the power supply battery U2 at the same time.

MOS pipe M1, MOS pipe M2, MOS pipe M3 and MOS pipe M4 all are connected with and are used for controlling its the control unit who switches on, and when the generator did not start, control unit made MOS pipe M1, MOS pipe M2, MOS pipe M3 and MOS pipe M4 close to U3 battery and U4 battery provide the start electric energy for the generator. After the generator is started, the control unit enables the MOS tube M1, the MOS tube M2, the MOS tube M3 and the MOS tube M4 to be started, alternating current is rectified and then stored in the power supply battery U2.

The direct current power generation unit comprises photovoltaic power generation equipment P, and the output end of the photovoltaic power generation equipment P is connected with a D1 diode for avoiding current reversal. The photovoltaic power generation equipment P is respectively connected with a power supply battery U2 and a standby battery U1 in parallel and used for simultaneously charging the power supply battery U2 and the standby battery U1. The power supply battery U2 is connected with external equipment through a stable output unit so as to supply power to an external load.

As shown in fig. 3, since the generated power of the photovoltaic power generation device P is affected by environmental factors, in order to ensure that the dc power generation unit supplies power to the backup battery U1 and the power supply battery U2 more stably, the backup battery U1 and the power supply battery U2 are both connected in parallel with a voltage stabilization regulation unit (the voltage stabilization regulation unit may or may not be integrated in the power supply system, and has no actual influence on the power storage amount). The voltage-stabilizing regulating unit comprises an MOS (metal oxide semiconductor) tube M6 and an MOS tube M5 which are connected at two ends of a standby battery U1 in parallel, the two ends of the standby battery U1 are also connected with an MOS tube M7 and an MOS tube M8 in parallel, a C4 capacitor used for storing electric energy is connected between the MOS tube M6 and the MOS tube M5 in parallel, and the other end of the C4 capacitor is connected between the MOS tube M7 and the MOS tube M8 after passing through an L5 filter inductor. When the voltage provided by the photovoltaic power generation equipment P is unstable, the C4 capacitor supplements the output current and also supplies power to the standby battery U1 and the power supply battery U2.

As shown in fig. 4, the power supply battery U2 is connected to the load through a voltage stabilizing output circuit to provide a more stable power supply voltage to the load. The voltage stabilizing output circuit comprises two voltage stabilizing operational amplifier circuits used for outputting positive and negative voltages, the voltage stabilizing operational amplifier circuit comprises an A1 operational amplifier, an output port of the A1 operational amplifier is connected with an R3 voltage regulating resistor in series, the R3 voltage regulating resistor is connected with a base electrode of a Q1 triode, and an R2 resistor is connected between a positive input port of the A1 operational amplifier and an emitting electrode of the Q1 triode in series and used for adjusting the amplification factor of the output voltage. The R2 resistor is connected with a C3 filter capacitor in parallel, the A1 operational amplifier is connected with a control unit, the control unit is used for supplying power to the A1 operational amplifier, the A1 operational amplifier is enabled to be put into use, and a collector electrode of the Q1 triode is connected with a power supply port of the Q1 triode.

The positive input port of the voltage stabilization output circuit is connected with an MOS tube M9 and an MOS tube M10 respectively, the other ends of the MOS tube M9 and the MOS tube M10 are connected to the two ends of the power supply battery U2 respectively, and similarly, the positive input port of the other voltage stabilization operational amplifier circuit is connected with an MOS tube M11 and an MOS tube M12 respectively, and the other ends of the MOS tube M11 and the MOS tube M12 are connected to the two ends of the power supply battery U2 respectively. MOS pipe M9, MOS pipe M10, MOS pipe M11 and MOS pipe M12 all are connected with the control unit, and the control unit is led through the different MOS pipes of control to control output direct current or alternating current circuit.

The utility model discloses a theory of operation and working process as follows:

when the power is supplied by the generator, the action of the generator is not influenced by the external environment, and the generated alternating current is stable. When the control unit detects that the generator is started, the MOS tube M1, the MOS tube M2, the MOS tube M3 and the MOS tube M4 are controlled to be not conducted, so that the generator is directly connected with the U3 storage battery and the U4 storage battery in series, and driving electric energy is provided for the generator. After the control unit detects that the generator is started, the control unit controls the MOS tube M1, the MOS tube M2, the MOS tube M3 and the MOS tube M4 to be conducted, forward current output by the generator sequentially passes through the MOS tube M3, the MOS tube M4 and the U3 capacitor to charge the U3 capacitor, and the forward current further passes through the MOS tube M3, the L2 filter inductor and the power supply battery U2 and the U3 capacitor to charge the power supply battery U2 and the U3 capacitor (mainly charge the power supply battery U2). The reverse current output by the generator sequentially passes through the MOS tube M1, the MOS tube M2 and the U4 capacitor and also passes through the MOS tube M1, the L1 filter inductor and the power supply batteries U2 and the U4 capacitor. Because the power supply battery U2 is connected with the backup battery U1 in parallel, the backup battery U1 is charged simultaneously in the process of charging the power supply battery U2.

When the photovoltaic power generation equipment P generates power and generates stable electric energy, the photovoltaic power generation equipment P directly charges the power supply battery U2 and the standby battery U1, when the electric energy generated by the photovoltaic power generation equipment P is unstable, the voltage output by the photovoltaic power generation equipment P is smaller than the voltage of the C4 capacitor, the C4 capacitor discharges, and the MOS tube M8 and the MOS tube M6 are conducted to supplement the electric energy. Similarly, when the backup battery U1 is charged, the MOS transistor M5 and the MOS transistor M7 are turned on to supplement electric energy (the supply battery U2 and the backup battery U1 can be supplemented with electric energy at the same time).

When power needs to be supplied to a load, the control unit only controls the MOS tube M9 and the MOS tube M11 or the MOS tube M10 and the MOS tube M12 to output a direct current power supply or alternatively controls the conduction of the direct current power supply and the alternating current power supply to output alternating current, and the output voltage is amplified by the A1 operational amplifier to output high-voltage stable and fixed electric energy.

The above detailed description of the embodiments of the present invention is only for the purpose of describing the preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.

Claims

1. A micro-grid power generation and energy storage system is characterized by comprising a control unit for controlling power generation and power supply, wherein the control unit is respectively connected with an alternating current power generation circuit, a direct current power generation circuit, a voltage stabilization charging circuit and a voltage stabilization output circuit, and the alternating current power generation circuit and the direct current power generation circuit are respectively connected with a standby battery U1 and a power supply battery U2 and used for charging the standby battery U1 and the power supply battery U2;

2. The microgrid power generation and energy storage system according to claim 1, wherein the other voltage stabilization operational amplifier circuit comprises an MOS tube M11 and an MOS tube M12 which are respectively connected to two ends of a power supply battery U2;

the control unit respectively controls whether the MOS tube M11, the MOS tube M12, the MOS tube M9, the MOS tube M10 and the A1 operational amplifier are conducted or not so as to control an output alternating current circuit or a direct current circuit.

3. The microgrid power generation and energy storage system of claim 1, wherein the R2 resistor is a variable resistor.

4. The microgrid power generation and energy storage system according to claim 1, wherein the alternating current power generation circuit comprises a power generator, and the power generator is sequentially connected in series with an MOS tube M1, an MOS tube M2, an MOS tube M3 and an MOS tube M4;

connect L1 filter inductance and L2 filter inductance between MOS pipe M1 and the MOS pipe M2 in proper order, the other end of L2 filter inductance connects electrically between MOS pipe M3 and MOS pipe M4, power supply battery U2's one end is connected to between L1 filter inductance and the L2 filter inductance, and the other end connects to between MOS pipe M2 and the MOS pipe M4 for charge for power supply battery U2.

5. The microgrid power generation and energy storage system of claim 4, wherein the MOS transistor M1 and the MOS transistor M2 are connected in parallel with a U3 storage battery, and the MOS transistor M3 and the MOS transistor M4 are connected in parallel with a U4 storage battery, and are used for storing driving electric energy for the generator.

6. The microgrid power generation and energy storage system of claim 1, wherein the direct current power generation circuit comprises a photovoltaic power generation device P generating a direct current circuit, and the photovoltaic power generation device P is respectively connected in parallel with a backup battery U1 and a power supply battery U2 through a D1 diode and is used for charging the backup battery U1 and the power supply battery U2 at the same time.

7. The microgrid power generation and energy storage system according to claim 1, wherein the voltage stabilization charging circuit comprises an MOS tube M6 and an MOS tube M7 which are connected in parallel with the backup battery U1, the MOS tube M6 is connected in series with an MOS tube M5, and the MOS tube M7 is connected in series with an MOS tube M8;

one end of a C4 capacitor is connected between the MOS tube M6 and the MOS tube M5 in parallel, and the other end of the C4 capacitor is connected between the MOS tube M7 and the MOS tube M8 for storing and providing supplementary electric energy.

8. The microgrid power generation and energy storage system according to claim 7, wherein the C4 capacitor is connected in series with an L5 filter inductor, and the C4 capacitor is also connected in parallel with an R1 resistor.