CN111200294B

CN111200294B - High-frequency bidirectional photovoltaic energy inversion energy storage system

Info

Publication number: CN111200294B
Application number: CN201811377395.1A
Authority: CN
Inventors: 卢育成; 周波; 谢卓明
Original assignee: Zhongshan Xuguiming Electronics Co ltd; VOLTRONIC POWER TECHNOLOGY (SHENZHEN) CORP; Voltronic Power Technology Corp
Current assignee: Zhongshan Xuguiming Electronics Co ltd; VOLTRONIC POWER TECHNOLOGY (SHENZHEN) CORP; Voltronic Power Technology Corp
Priority date: 2018-11-19
Filing date: 2018-11-19
Publication date: 2022-03-22
Anticipated expiration: 2038-11-19
Also published as: CN111200294A

Abstract

The invention discloses a high-frequency bidirectional photovoltaic energy inversion energy storage system which comprises a flyback inversion charger, an interleaved voltage reduction type photovoltaic energy charging controller, a microcontroller A, an output controller, an analog controller and microcontroller B, a plurality of inversion-current transformers, a first auxiliary power supply A and a second auxiliary power supply B. The inverter-converter comprises a first inverter, a second converter and a third converter. When only one of the commercial power end, the photovoltaic energy end and the battery end of the high-frequency bidirectional photovoltaic energy inversion energy storage system can be used, the high-frequency bidirectional photovoltaic energy inversion energy storage system can still enable the whole high-frequency bidirectional photovoltaic energy inversion energy storage system to continuously and normally supply power to a load for use.

Description

High-frequency bidirectional photovoltaic energy inversion energy storage system

Technical Field

The invention relates to a high-frequency bidirectional photovoltaic energy inversion energy storage system, in particular to a high-frequency bidirectional photovoltaic energy inversion energy storage system which can still normally run when only one power supply can be used in a multi-power supply integrated system.

Background

In the conventional photovoltaic energy inversion energy storage system, when the electric quantity of a battery is completely exhausted and the whole system is started or needs to be continuously supplied to a load power supply for use, the operation of the whole circuit system and the normal power supply thereof cannot be started, so that the power supply at a load end is often interrupted or the power supply is damaged. In addition, when the source of one or two power sources in the integrated energy storage system of the utility power, the photovoltaic energy and the battery is problematic, and only one of the remaining power sources can supply power, the load power supply of the energy storage system is unstable or the system cannot be started, and needs to be improved.

Disclosure of Invention

The invention discloses a high-frequency bidirectional photovoltaic energy inversion energy storage system, which can improve the defects of the existing energy storage system, is effectively applied to a large power integration system of commercial power, photovoltaic energy and batteries, has high efficacy, and can achieve the purpose of providing a converter, an inverter or a current converter which efficiently uses various power sources. Particularly, under the working condition that only the commercial power part can be used, or the working condition that only the photovoltaic energy runs, or the situation that only the battery end can run in the whole system, the whole high-frequency bidirectional photovoltaic energy inversion energy storage system can still normally supply the power supply required by the load end and the running of the power supply can still be realized through the technical content of the invention.

The invention relates to a high-frequency bidirectional photovoltaic energy inversion energy storage system, which comprises: a flyback inverter charger, the input end of which is coupled to a commercial power end; the input end of the staggered step-down photovoltaic energy charging controller is coupled to a photovoltaic energy end, and the output end of the staggered step-down photovoltaic energy charging controller is coupled to the output end of the flyback inverter charger and a battery end; the microcontroller A is coupled with the staggered step-down photovoltaic energy charging controller; the input end of the output controller is coupled with the output end of the staggered step-down photovoltaic energy charging controller, and the output end of the output controller is coupled with a load end; an analog controller and microcontroller B coupled to the output controller; a plurality of inverter-converters, the input ends of which are coupled to the commercial power end, the photovoltaic energy end and the battery end respectively, and the output ends of which are coupled to a Vm respectively; a first auxiliary power supply A, the input end of which is coupled with Vm, and the output end of which is coupled with the microcontroller A; and a second auxiliary power supply B, the input end of which is coupled with the Vm, and the output end of which is coupled with the analog controller and the microcontroller B.

In an embodiment of the present invention, the inverter-converter includes: the input end of the first inverter is coupled to the commercial power end, and the output end of the first inverter is coupled to the Vm; the input end of the second converter is coupled to the photovoltaic energy end, and the output end of the second converter is coupled to the Vm; and the input end of the third converter is coupled to the battery end, and the output end of the third converter is coupled to the Vm.

In an embodiment of the present invention, when only the battery end can supply power and neither the commercial end nor the photovoltaic end can supply power, the third converter is activated, and then the third converter establishes power supplies of the first auxiliary power supply a and the second auxiliary power supply B, and respectively outputs the power signal Vcca and the power signal Vccb; the power supply signal Vcca starts the microcontroller A to work, and the power supply signal Vccb starts the analog controller and the microcontroller B to work; therefore, the staggered step-down photovoltaic energy charging controller and the output controller work normally to output the power required by the load end.

In an embodiment of the present invention, when only the photovoltaic end can supply power and neither the commercial end nor the battery end can supply power, the second converter is activated, and then the second converter establishes power supplies of the first auxiliary power supply a and the second auxiliary power supply B, and respectively outputs the power signal Vcca and the power signal Vccb; the power supply signal Vcca starts the microcontroller A to work, and the power supply signal Vccb starts the analog controller and the microcontroller B to work; therefore, the staggered step-down photovoltaic energy charging controller and the output controller work normally to output the power required by the load end.

In an embodiment of the present invention, when only the commercial power end can supply power and neither the battery end nor the photovoltaic end can supply power, the first inverter is started, and then the first inverter establishes power supplies of the first auxiliary power supply a and the second auxiliary power supply B, and respectively outputs the power signal Vcca and the power signal Vccb; the power supply signal Vcca starts the microcontroller A to work, and the power supply signal Vccb starts the analog controller and the microcontroller B to work; the staggered step-down photovoltaic energy charging controller and the output controller work normally to output power required by the load end; the first inverter is an AC/DC flyback-flyback converter (AC/DC flyback-converter) for converting AC voltage at the commercial power end and boosting the AC voltage to a DC voltage level.

In an embodiment of the present invention, the output controller includes: the input end of the push-pull converter is coupled with the output end of the staggered step-down photovoltaic energy charging controller, and the input end of the push-pull converter is coupled with the output end of the flyback inverter charger and the battery end at the same time; the push-pull converter comprises a conversion transformer, the secondary side of the conversion transformer is directly coupled with a plurality of switch components and a capacitor, and the secondary side of the conversion transformer is connected without an inductance component; the input end of the full-bridge rectifier is coupled with the output end of the push-pull converter, and the output end of the full-bridge rectifier is coupled with the load end; the push-pull converter is a circuit structure of a direct current/direct current converter, and the full-bridge rectifier is a circuit structure of a direct current/alternating current inverter.

In an embodiment of the present invention, the flyback inverter charger is further coupled to an analog controller, the analog controller transmits a PWM1 signal to the flyback inverter charger to drive the flyback inverter charger to operate, and the flyback inverter charger transmits a V-I1 signal to the analog controller as a voltage-current detection feedback signal.

In an embodiment of the present invention, the analog controller and microcontroller B is further coupled with: a communication module, coupled to the analog controller and the microcontroller B, for transmitting and receiving a TX-RX signal; a display module, coupled to the analog controller and microcontroller B, for outputting an ON-OFF4 signal to the analog controller and microcontroller B and receiving an ON-OFF3 signal from the analog controller and microcontroller B; and a function key module coupled to the display module for controlling the display module.

The invention also provides a high-frequency bidirectional photovoltaic energy inversion energy storage system, which comprises: a commercial power terminal coupled to a load terminal; the input end of the maximum power tracking photovoltaic energy charging controller is coupled with a photovoltaic energy end; the input end of the push-pull converter is coupled to a battery end, and the output end of the push-pull converter is coupled to the output end of the maximum power tracking photovoltaic energy charging controller; a full bridge rectifier, the input end of which is coupled to the output end of the push-pull converter, and the output end of which is coupled to the load end; an analog controller and microcontroller B, coupled to the push-pull converter and the full-bridge rectifier, and coupled to the MPPT charging controller, for transmitting a PWM7 signal to drive the MPPT charging controller to work, and receiving a V-I5 voltage/current detection signal outputted by the MPPT charging controller; a first inverter, the input end is coupled to the commercial power end, and the output end is coupled to Vm; the input end of the second converter is coupled to the photovoltaic energy end, and the output end of the second converter is coupled to the Vm; a third converter, the input end is coupled to the battery end, and the output end is coupled to the Vm; and an auxiliary power supply, the input end of which is coupled with the Vm, and the output end of which is coupled with the analog controller and the microcontroller B, and is used for outputting a Vccb power supply signal so as to start the analog controller and the microcontroller B to work.

In the above embodiment, the analog controller and microcontroller B is further coupled with: a communication module, coupled to the analog controller and the microcontroller B, for transmitting and receiving a TX-RX signal; a display module, coupled to the analog controller and microcontroller B, for outputting an ON-OFF4 signal to the analog controller and microcontroller B and receiving an ON-OFF3 signal from the analog controller and microcontroller B; and a function key module coupled to the display module for controlling the display module.

Drawings

FIG. 1 is a circuit block diagram illustrating a first embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating an operating state of the first embodiment of the present invention;

FIG. 3 is a schematic view of another operating condition of the first embodiment of the present invention;

FIG. 4 is a schematic view of a further operating condition of the first embodiment of the present invention;

FIG. 5 is a circuit block diagram illustrating a second embodiment of the present invention;

FIG. 6 is a schematic view of an operating state of the second embodiment of the present invention;

FIG. 7 is a schematic view of another operating condition in the second embodiment of the present invention;

fig. 8 is a schematic view of another operation state in the second embodiment of the present invention.

Detailed Description

Various exemplary embodiments are described more fully hereinafter with reference to the accompanying drawings, in which some exemplary embodiments are shown. The inventive concept may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. The corresponding connections of circuit blocks to circuit elements, and of various signals to various devices may be exaggerated in the figures for clarity, where like reference numerals or numbers refer to like elements throughout.

It should be understood that although the term switch assembly may be used herein to include an inverter, converter or converter, etc., it is used in a descriptive sense to refer to a converter or inverter, but not limited to the use of different terms for the inverter, converter or converter, i.e., such assemblies should not be limited by the actual product terms for such electronic circuits. And first, second, third …, etc., where the terms first, second and third are used herein, they are used to distinguish one element from another without necessarily requiring a chronological relationship between the elements, that is, embodiments in which the first, third and second elements are absent may not necessarily require the presence of consecutive reference numerals to identify the elements.

As used herein, the terms input (or output) and output (or input), and the like are used to clearly distinguish one transmission point of a component from another transmission point of the component, or to distinguish a corresponding connection relationship between one component and another component, or to distinguish one end from another end by different or relative positions, and are not intended to limit the order or absolute positional relationship presented by the literal numbers, and are not necessarily in a certain numerical continuous relationship. Also, the term "and/or" may be used to include any and all combinations of one or more of the associated listed items. Further, the terms "plurality" or "at least two" may be used herein to describe a plurality of elements, but such plurality or at least two elements is not limited to practice with two, three or four or more elements as the number of elements represents technology being practiced.

The invention discloses a high-frequency bidirectional photovoltaic energy inversion energy storage system, which is applied to circuits of an inversion energy storage system with three different power sources, such as commercial power, photovoltaic energy, batteries and the like, and particularly can be applied to the situation that the whole system only has the working condition that the commercial power part can operate, or the whole system only has the working condition that the photovoltaic energy can operate, or the whole system only has the working condition that the batteries can operate, so that the whole high-frequency bidirectional photovoltaic energy inversion energy storage system can still normally operate through the technical content of the invention. That is, the present invention provides a method for improving the utilization efficiency of different power supply terminals, continuously providing a stable and effective power supply for a load, and reducing the occurrence of the situation that the whole system circuit cannot operate or unnecessary power consumption, that is, the embodiments of the present invention have the technical advantages of high load working efficiency and stable power supply.

Referring to fig. 1, the high-frequency bidirectional photovoltaic energy inversion energy storage system of the invention includes a flyback inverter charger 20, an interleaved buck photovoltaic energy charging controller 22, a microcontroller a 24, an output controller 23, an analog controller and microcontroller B26, a plurality of inverter-converters 30, a first auxiliary power supply a 35 and a second auxiliary power supply B36. Wherein the input terminal of the flyback inverter charger 20 is coupled to a commercial power terminal; the input terminal of the interleaved buck-type photovoltaic charging controller 22 is coupled to a photovoltaic terminal, and the output terminal of the interleaved buck-type photovoltaic charging controller 22 is coupled to the output terminal of the flyback inverter charger 20, which is a Vb contact, and the Vb contact is coupled to a battery terminal. Therefore, the high-frequency bidirectional photovoltaic energy inversion energy storage system is applied to a large system which integrates commercial power, photovoltaic energy (solar energy), rechargeable batteries and the like.

The microcontroller a 24 of fig. 1 is coupled to the interleaved buck photovoltaic energy charging controller 22, and the connection relationship is that the microcontroller a 24 outputs a PWM2 signal to transmit to the interleaved buck photovoltaic energy charging controller 22, and the interleaved buck photovoltaic energy charging controller 22 transmits a V-I2 signal to the microcontroller a 24. The PWM2 signal is actually a Pulse Width Modulation (Pulse Width Modulation) signal and is a high-frequency Modulation signal for driving the circuit topology of the interleaved buck-type photovoltaic charging controller 22 to execute operations, and the V-I2 is a voltage and current detection signal related to the interleaved buck-type photovoltaic charging controller 22, and transmits the voltage and current signal to the microcontroller a 24 for adjusting the required driving signal.

The input terminal of the output controller 23 is coupled to the output terminal of the interleaved buck-type photovoltaic charging controller 22, that is, connected to the Vb node, and the output terminal of the output controller 23 is coupled to a load terminal, which is mainly a load terminal in the form of ac power. The analog controller and microcontroller B26 is coupled to the output controller 23 for transmitting signals required for control operations. The input end of the inverter-converter 30 is coupled to the commercial power end, the photovoltaic end and the battery end, the output end of the inverter-converter 30 is coupled to a Vm, and the Vm is a connection point which is a circuit connection point. The input end of the first auxiliary power supply A35 is coupled to Vm, and the output end of the first auxiliary power supply A35 is coupled to the microcontroller A24; the input terminal of the second auxiliary power supply B36 is coupled to Vm, and the output terminal of the second auxiliary power supply B36 is coupled to the analog controller and microcontroller B26.

In one embodiment, the inverter-converter 30 includes a first inverter 31, a second converter 32 and a third converter 33. Wherein the input end of the first inverter 31 is coupled to the utility power end, and the output end of the first inverter 31 is coupled to Vm; the input end of the second converter 32 is coupled to the photovoltaic energy end, and the output end of the second converter 32 is coupled to Vm; in addition, the input terminal of the third converter 33 is coupled to the battery terminal, and the output terminal of the third converter is coupled to Vm. In practical circuit applications, a diode 34 is further connected between each output terminal of the first inverter 31, the second converter 32, and the third converter 33 and Vm, as shown in fig. 1. In addition, in practical circuit topology, the first inverter 31 is an AC/DC flyback converter (AC/DC flyback-back inverter) for converting the AC voltage at the commercial end and boosting the AC voltage to a DC voltage level. The second converter 32 is a DC/DC boost flyback converter (DC/DC Fly-back converter) for boosting the voltage of the photovoltaic energy end to a DC level. The third converter 33 is a DC/DC boost flyback converter (DC/DC Fly-back converter) for boosting the voltage of the battery terminal to a DC level.

In practical circuit operation, the output controller 23 in fig. 1 includes a Push-pull converter (Push-pull converter) 25 and a Full-Bridge rectifier (Full Bridge inverter) 27, wherein an input terminal of the Push-pull converter 25 is coupled to an output terminal of the interleaved buck photovoltaic energy charging controller 22, i.e., to a Vb node, and an input terminal of the Push-pull converter 23 is coupled to an output terminal of the flyback inverter charger 20 and to the battery terminal. The input terminal of the full-bridge rectifier 27 is coupled to the output terminal of the push-pull converter, and the output terminal of the full-bridge rectifier 27 is coupled to the load terminal.

The push-pull converter 25 is a circuit structure of a dc/dc converter, and in another embodiment, may be a full-bridge converter circuit structure. The push-pull converter 25 is coupled to the analog controller and microcontroller B26, and the analog controller and microcontroller B26 transmits PWM3, PWM4 and ON-OFF1 signals to the push-pull converter 25, where the PWM3 and PWM4 signals are Pulse Width Modulation (Pulse Width Modulation) signals and are high-frequency Modulation signals for driving the circuit topology of the push-pull converter 25 to execute operations; the ON-OFF1 signal indicates the operation mode that the analog controller and microcontroller B26 can control the push-pull converter 25 to perform ON/OFF. And transmitting a V-I3 signal from the push-pull converter 25 to the analog controller and microcontroller B26. the V-I3 mainly relates to the voltage and current detection signal of the push-pull converter 25, and transmitting the voltage and current signal to the analog controller and microcontroller B26 for implementing the required adjustment of the driving signal.

In the embodiment of the present invention, the circuit structure of the push-pull converter 25 includes a converting transformer (not numbered), and the secondary side of the converting transformer is directly electrically connected to a plurality of switch elements (not shown) and a capacitor (not shown) to form a circuit element connection state of the secondary side of the push-pull converter 25. That is, the secondary side of the transformer in the push-pull converter 25 of the present invention does not have any connection of the inductor component, and the present invention directly adopts the connection relationship between the leakage inductance of the transformer itself and the capacitor (not shown in the figure) to form the resonance effect, so as to achieve the current switching effect of zero current (or small current) and reduce the switching loss of the switching component.

In addition, the full-bridge rectifier 27 is a circuit topology structure of a dc/ac inverter, and the full-bridge rectifier 27 is also coupled to the signal of the analog controller and microcontroller B26, and the analog controller and microcontroller B26 transmits the signals of PWM5, PWM6 and ON-OFF2 to the full-bridge rectifier 27. Similarly, the PWM5 and PWM6 signals are Pulse Width Modulation (Pulse Width Modulation) signals, and are high frequency Modulation signals for driving the circuit topology of the full-bridge rectifier 27 to operate; the ON-OFF2 signal indicates the mode of operation in which the analog controller and microcontroller B26 can control the full bridge rectifier 27 to turn ON or OFF. And transmitting a V-I4 signal from the full-bridge rectifier 27 to the analog controller and microcontroller B26. the V-I4 mainly relates to the voltage and current detection signal of the full-bridge rectifier 27, and transmitting the voltage and current signal to the analog controller and microcontroller B26 for performing the required adjustment of the driving signal.

In fig. 1, an Analog Controller (Analog Controller)21 is further coupled to the flyback inverter charger 20, and the Analog Controller 21 transmits a PWM1 signal to the flyback inverter charger 20, where the PWM1 signal is also a Pulse Width Modulation (Pulse Width Modulation) signal and is a high-frequency Modulation signal, and is mainly used to drive the flyback inverter charger 20 to perform circuit operation. The flyback inverter charger 20 transmits a V-I1 signal to the analog controller 21 as a voltage-current detection feedback signal; the V-I1 signal is mainly related to the voltage and current detection signal of the flyback inverter charger 20, and is transmitted to the analog controller 21 for executing the required driving signal and adjustment thereof.

In an embodiment of the present invention, the analog controller and microcontroller B is further coupled to a Communication Module (Communication Module)40 and a Display Module (Display Module)41, and the Display Module 41 is further coupled to a Function Key Module (Function Key Module) 42. The communication module 40 is coupled to the analog controller and the microcontroller B26 for transmitting and receiving a TX-RX signal, which is mainly used as a transmission signal or a reception signal for wireless communication transmission, so that the high-frequency bidirectional photovoltaic energy inverter energy storage system of the present invention enables a user or an operator to perform operation and control of the system in a wireless communication transmission manner. The display module 41 is coupled to the analog controller and microcontroller B26, and the display module 41 outputs an ON-OFF4 signal to the analog controller and microcontroller B26 and receives an ON-OFF3 signal output by the analog controller and microcontroller B26; the ON-OFF3 signal is used for controlling the ON/OFF operation of the display module 41 by the analog controller and microcontroller B26; the ON-OFF4 signal is used to control the ON/OFF operation of the analog controller and microcontroller B26 by the display module 41. The display module 41 controls the operation of the analog controller and microcontroller B26, the function key module 42 is coupled to the display module 41 to control the operation of the analog controller and microcontroller B26, and the function key module 42 can be controlled and operated by a user or an operator.

For further operation of the present invention, please refer to fig. 2, fig. 3 and fig. 4, in which fig. 2 is a diagram illustrating a case where only the battery terminal can supply the power required by the load terminal, and neither the commercial power terminal nor the photovoltaic power terminal can supply power; at this time, the third converter 33 coupled to the battery terminal is activated, and the third converter 33 establishes power supply sources of the first auxiliary power supply a 35 and the second auxiliary power supply B36, and outputs the power signal Vcca and the power signal Vccb, respectively. The power supply signal Vcca starts the microcontroller a 24 to operate, and the power supply signal Vccb starts the analog controller and the microcontroller B26 to operate. Thus, the interleaved buck photovoltaic charging controller 22 and the output controller 23 of the present invention can work normally to output the power required by the load. The third converter 33 is a DC/DC boost flyback converter (DC/DC flyback-back converter) for boosting the voltage of the battery terminal to a DC level, and when the actual circuit operates, the voltage value of the Vm terminal is about DC 150V.

In the power supply state shown in fig. 3, when only the photovoltaic terminal can supply power and neither the commercial terminal nor the battery terminal can supply power, the second converter 32 is activated, and the second converter 32 establishes power supply sources of the first auxiliary power supply a 35 and the second auxiliary power supply B36, and then outputs the power signal Vcca and the power signal Vccb, respectively. The power signal Vcca is used to start the microcontroller a 24 to work, and the power signal Vccb starts the analog controller and the microcontroller B26 to work, so that the interleaved buck photovoltaic charging controller 22 and the output controller 23 can work normally, and further, the power supply required by the load end is output. In practical applications, the second converter 32 is a DC/DC boost flyback converter (DC/DC flyback-back converter) for boosting the voltage of the photovoltaic end to a DC level, and in practical circuits, the voltage value of the Vm end can be boosted to a voltage value in a range of about DC 150V-400V.

Fig. 4 shows a system state when only the commercial power end can supply power and neither the battery end nor the photovoltaic end can supply power, at this time, the first inverter 31 coupled to the commercial power end is started, the first inverter 31 directly establishes power supply sources of the first auxiliary power supply a 35 and the second auxiliary power supply B36, and then the power signals Vcca and Vccb are respectively output. The power signal Vcca starts the microcontroller a 24 to work, and the power signal Vccb starts the analog controller and the microcontroller B26 to perform work, so that the interleaved step-down photovoltaic energy charging controller 22 and the output controller 23 can work normally and output the power required by the load end. When the actual circuit is in use, the first inverter 31 is an AC/DC flyback converter (AC/DC flyback-back inverter) for converting AC voltage at the commercial end into DC voltage and boosting the DC voltage to a DC voltage level; in practice, the voltage value of Vm can convert the ac voltage of the utility power into a DC voltage value of about DC 150V.

As described above, the high-frequency bidirectional photovoltaic inverter energy storage system of the present invention can still normally output the power required by the load end when only the commercial power or only the photovoltaic (solar) power is available without using the battery.

Referring to fig. 5, a second embodiment of the present invention is a circuit block diagram, which includes: a commercial power terminal, a photovoltaic power terminal, a battery terminal, a load terminal, a maximum power tracking photovoltaic power charging controller 50, an output controller 23, an analog controller and microcontroller B26, a plurality of inverter-converters 30 and an auxiliary power supply 38. Wherein the commercial power terminal is coupled with the load terminal; the input terminal of the maximum power tracking photovoltaic charge controller 50 is coupled to the photovoltaic power terminal. As in the previous embodiment, the output controller 23 includes a push-pull converter 25 and a full-bridge rectifier 27; the input end of the push-pull converter 25 is coupled to the battery end, and the output end of the push-pull converter 25 is coupled to the output end of the maximum power tracking photovoltaic energy charging controller 50; an input terminal of the full-bridge rectifier 27 is coupled to the output terminal of the push-pull converter 25, and an output terminal of the full-bridge rectifier 27 is coupled to the load terminal.

The analog controller and microcontroller B26 is coupled to the push-pull converter 25 and the full-bridge rectifier 27, wherein the signals of PWM3, PWM4, ON-OFF1, V-I3, PWM5, PWM6, ON-OFF2, and V-I4 transmitted between the analog controller and microcontroller B26 and the push-pull converter 25 and the full-bridge rectifier 27 are the same as the previous embodiment, please refer to the previous description. The analog controller and microcontroller B26 is coupled to the maximum power tracking photovoltaic charge controller 50, and transmits a PWM7 signal to drive the maximum power tracking photovoltaic charge controller 50 to perform control and operation, and the analog controller and microcontroller B26 receives a voltage and current detection signal of a V-I5 signal outputted by the maximum power tracking photovoltaic charge controller 50, so as to adjust and control the driving voltage and current required by the PWM7 signal.

In fig. 5, as in the first embodiment, the first inverter 31, the second inverter 32, and the third inverter 33 are included in the inverter-converters 30. Similarly, the input terminal of the first inverter 31 is coupled to the utility power terminal, and the output terminal of the first inverter 31 is coupled to Vm; the input end of the second converter 32 is coupled to the photovoltaic energy end, and the output end of the second converter 32 is coupled to Vm; the input terminal of the third converter 33 is coupled to the battery terminal, and the output terminal of the third converter is coupled to Vm. As described in the previous embodiment, in practical circuit application, a diode 34 is further connected between each output terminal of the first inverter 31, the second converter 32 and the third converter 33 and Vm, as shown in fig. 1.

In practical circuit topology, the first inverter 31 is an AC/DC flyback converter (AC/DC flyback-back inverter) for converting AC voltage at the commercial end and boosting the AC voltage to a DC voltage level. The second converter 32 is a DC/DC boost flyback converter (DC/DC Fly-back converter) for boosting the voltage of the photovoltaic energy end to a DC level. The third converter 33 is a DC/DC boost flyback converter (DC/DC Fly-back converter) for boosting the voltage of the battery terminal to a DC level.

Unlike the previous embodiment, in the second embodiment of the present invention, only one auxiliary power supply 38 is provided, the input terminal of the auxiliary power supply 38 is coupled to Vm, and the output terminal is coupled to the analog controller and microcontroller B26, for outputting a Vccb power signal, so as to start the analog controller and microcontroller B26 to perform the control and operation operations.

The analog controller and microcontroller B shown in fig. 5 is also coupled with a Communication Module (Communication Module)40 and a Display Module (Display Module)41, and the Display Module 41 is further coupled with a Function Key Module (Function Key Module) 42. The communication module 40 is coupled to the analog controller and the microcontroller B26 for transmitting and receiving a TX-RX signal, which is mainly used as a transmission signal or a reception signal for wireless communication transmission, so that the high-frequency bidirectional photovoltaic energy inverter energy storage system of the present invention enables a user or an operator to perform operation and control of the system in a wireless communication transmission manner. The display module 41 is coupled to the analog controller and microcontroller B26, and the display module 41 outputs an ON-OFF4 signal to the analog controller and microcontroller B26 and receives an ON-OFF3 signal output by the analog controller and microcontroller B26; the ON-OFF3 signal is used for controlling the ON/OFF operation of the display module 41 by the analog controller and microcontroller B26; the ON-OFF4 signal is used to control the ON/OFF operation of the analog controller and microcontroller B26 by the display module 41. As in the previous embodiment, the display module 41 controls the operation of the analog controller and microcontroller B26, and the function key module 42 is coupled to the display module 41 to control the operation of the analog controller and microcontroller B26, and the function key module 42 can be controlled and operated by a user or an operator.

For further operation of the second embodiment of the present invention, please refer to fig. 6, fig. 7 and fig. 8, in which fig. 6 illustrates a case where only the battery terminal can supply the power required by the load terminal, and neither the commercial power terminal nor the photovoltaic terminal can supply power; at this time, the third converter 33 coupled to the battery terminal is activated, and the third converter 33 establishes a power supply source of the auxiliary power supply 38, and outputs a power signal Vccb, which is used to activate the analog controller and the microcontroller B26. Thus, the maximum power tracking photovoltaic charging controller 50 and the output controller 23 of the present invention can work normally to output the power required by the load. In practice, the third converter 33 is a DC/DC boost-type flyback converter (DC/DC Fly-back converter) for boosting the voltage of the battery end to a DC level, and when the actual circuit operates, the voltage value of the Vm end is about DC 150V.

In the power supply state shown in fig. 7, when only the photovoltaic terminal can supply power and neither the commercial terminal nor the battery terminal can supply power, the second converter 32 is activated, and the second converter 32 establishes a power supply source of the auxiliary power supply 38, and then outputs the power signal Vccb, which activates the analog controller and the microcontroller B26 to operate, so that the maximum power tracking photovoltaic charging controller 50 and the output controller 23 can operate normally, and further output the power required by the load terminal. In practical circuit applications, the second converter 32 is a DC/DC boost flyback converter (DC/DC flyback-back converter) for boosting the voltage at the photovoltaic end to a DC level, and in practical circuits, the voltage value at the Vm end can be boosted to a voltage value in a range of about DC 150V-400V.

Fig. 8 shows the system state when only the commercial power terminal can supply power and neither the battery terminal nor the photovoltaic terminal can supply power, at this time, the first inverter 31 coupled to the commercial power terminal is activated, the first inverter 31 directly establishes the power supply source of the auxiliary power supply 38, and then the power signal Vccb is outputted. The power signal Vccb starts the analog controller and the microcontroller B26 to execute the operation, so that the maximum power tracking type photovoltaic charging controller 50 and the output controller 23 can normally operate, and output the power required by the load terminal. In practical circuit, the first inverter 31 is an AC/DC flyback converter (AC/DC flyback-back inverter) for converting AC voltage at commercial power end into DC voltage and boosting the DC voltage to a DC voltage level; in practice, the voltage value of Vm can convert the ac voltage of the utility power into a DC voltage value of about DC 150V.

In summary, the present invention provides a high-frequency bidirectional photovoltaic energy inversion energy storage system, which can improve the existing circuit loss, and has efficacy when being effectively applied to a large power system of commercial power, photovoltaic energy and batteries, and can achieve the purpose of providing a converter, an inverter or a current converter with high efficiency and using various power sources; particularly, under the working condition that only a commercial power part can be operated in the whole system, or the working condition that only photovoltaic power can be operated in the whole system, or the working condition that only a battery can be operated in the whole system, the whole high-frequency bidirectional photovoltaic energy inversion energy storage system can still normally operate through the technical content of the invention; and the secondary side of the conversion transformer in the push-pull converter is directly coupled with a plurality of switch components and a capacitor, namely the secondary side of the conversion transformer is connected without an inductance component. Obviously, the patent application of the invention has the patent application requirements.

However, the description of the present invention is only an illustration of the preferred embodiments, and the scope of the present invention should not be limited by the description of the preferred embodiments, and any local variations, modifications, or additions may be made without departing from the scope of the present invention.

Claims

1. The utility model provides a two-way photovoltaic energy contravariant energy storage system of high frequency which characterized in that, including:

a flyback inverter charger, the input end of which is coupled to a commercial power end;

the input end of the staggered step-down photovoltaic energy charging controller is coupled to a photovoltaic energy end, and the output end of the staggered step-down photovoltaic energy charging controller is coupled to the output end of the flyback inverter charger and a battery end;

the microcontroller A is coupled with the staggered step-down photovoltaic energy charging controller;

the input end of the output controller is coupled with the output end of the staggered step-down photovoltaic energy charging controller, and the output end of the output controller is coupled with a load end;

an analog controller and microcontroller B coupled to the output controller;

the input end of the first inverter is coupled to the commercial power end, and the output end of the first inverter is coupled to Vm; the first inverter is an AC/DC flyback converter;

the input end of the second converter is coupled to the photovoltaic energy end, and the output end of the second converter is coupled to the Vm; and the second converter is a DC/DC flyback converter;

the input end of the third converter is coupled to the battery end, and the output end of the third converter is coupled to the Vm; and the third converter is a direct current/direct current flyback converter;

a first auxiliary power supply A, the input end of which is coupled with Vm, and the output end of which is coupled with the microcontroller A; when only one of the commercial power end, the photovoltaic energy end and the battery end can supply power, the first auxiliary power supply A supplies power to the microcontroller A; and

a second auxiliary power supply B, the input end of which is coupled with the Vm, and the output end of which is coupled with the analog controller and the microcontroller B; when only one of the commercial power end, the photovoltaic energy end and the battery end can supply power, the second auxiliary power supply B supplies power to the analog controller and the microcontroller B, so that the interleaved voltage-reducing photovoltaic energy charging controller and the output controller can work normally, and further the power supply required by the load end is output, and the power supply of the load end is not interrupted.

2. The high-frequency bidirectional photovoltaic energy inversion energy storage system of claim 1, wherein when only the battery terminal can supply power and neither the commercial power terminal nor the photovoltaic energy terminal can supply power, the third converter is activated, and then the third converter establishes power supplies of the first auxiliary power supply a and the second auxiliary power supply B to respectively output a power signal Vcca and a power signal Vccb; the power supply signal Vcca starts the microcontroller A to work, and the power supply signal Vccb starts the analog controller and the microcontroller B to work; therefore, the staggered step-down photovoltaic energy charging controller and the output controller work normally to output the power required by the load end.

3. The high-frequency bidirectional photovoltaic energy inversion energy storage system of claim 1, wherein when only the photovoltaic energy end can supply power and neither the commercial power end nor the battery end can supply power, the second converter is activated, and then the second converter establishes power supplies of the first auxiliary power supply a and the second auxiliary power supply B to respectively output a power signal Vcca and a power signal Vccb; the power supply signal Vcca starts the microcontroller A to work, and the power supply signal Vccb starts the analog controller and the microcontroller B to work; therefore, the staggered step-down photovoltaic energy charging controller and the output controller work normally to output the power required by the load end.

4. The high-frequency bidirectional photovoltaic energy inversion energy storage system of claim 1, wherein when only the commercial power terminal can supply power and neither the battery terminal nor the photovoltaic power terminal can supply power, the first inverter is activated, and then the first inverter establishes power supplies of the first auxiliary power supply a and the second auxiliary power supply B to respectively output a power signal Vcca and a power signal Vccb; the power supply signal Vcca starts the microcontroller A to work, and the power supply signal Vccb starts the analog controller and the microcontroller B to work; the staggered step-down photovoltaic energy charging controller and the output controller work normally to output power required by the load end; the first inverter is used for converting the alternating voltage of the commercial power end and boosting the alternating voltage to a direct voltage level.

5. The high frequency bi-directional photovoltaic energy inversion energy storage system of claim 1, wherein the output controller comprises:

the input end of the push-pull converter is coupled with the output end of the staggered step-down photovoltaic energy charging controller, and the input end of the push-pull converter is coupled with the output end of the flyback inverter charger and the battery end at the same time; the push-pull converter comprises a conversion transformer, the secondary side of the conversion transformer is directly coupled with a plurality of switch components and a capacitor, and the secondary side of the conversion transformer is connected without an inductance component; and

the input end of the full-bridge rectifier is coupled with the output end of the push-pull converter, and the output end of the full-bridge rectifier is coupled with the load end;

the push-pull converter is a circuit structure of a direct current/direct current converter, and the full-bridge rectifier is a circuit structure of a direct current/alternating current inverter.

6. The high frequency bi-directional photovoltaic energy inverter energy storage system of claim 1, wherein the flyback inverter charger is further coupled with an analog controller, the analog controller transmits a PWM1 signal to the flyback inverter charger to drive the flyback inverter charger to operate, and the flyback inverter charger transmits a V-I1 signal to the analog controller as a voltage-current detection feedback signal.

7. The high frequency bi-directional photovoltaic energy inversion energy storage system of claim 1, wherein the analog controller and microcontroller B is further coupled with:

a communication module, coupled to the analog controller and the microcontroller B, for transmitting and receiving a TX-RX signal;

a display module, coupled to the analog controller and microcontroller B, for outputting an ON-OFF4 signal to the analog controller and microcontroller B and receiving an ON-OFF3 signal from the analog controller and microcontroller B; and

and the function key module is coupled with the display module and used for controlling the display module.

8. The utility model provides a two-way photovoltaic energy contravariant energy storage system of high frequency which characterized in that, including:

a commercial power terminal coupled to a load terminal;

the input end of the maximum power tracking photovoltaic energy charging controller is coupled with a photovoltaic energy end;

the input end of the push-pull converter is coupled to a battery end, and the output end of the push-pull converter is coupled to the output end of the maximum power tracking photovoltaic energy charging controller;

a full bridge rectifier, the input end of which is coupled to the output end of the push-pull converter, and the output end of which is coupled to the load end;

an analog controller and microcontroller B, coupled to the push-pull converter and the full-bridge rectifier, and coupled to the MPPT charging controller, for transmitting a PWM7 signal to drive the MPPT charging controller to work, and receiving a V-I5 voltage/current detection signal outputted by the MPPT charging controller;

a first inverter, the input end is coupled to the commercial power end, and the output end is coupled to Vm; the first inverter is an AC/DC flyback converter;

a third converter, the input end is coupled to the battery end, and the output end is coupled to the Vm; and the third converter is a direct current/direct current flyback converter; and

an auxiliary power supply, the input end of which is coupled with the Vm, and the output end of which is coupled with the analog controller and the microcontroller B, and is used for outputting a Vccb power signal to start the analog controller and the microcontroller B to work;

when only one of the commercial power end, the photovoltaic energy end and the battery end can supply power, the auxiliary power supply supplies power to the analog controller and the microcontroller B, so that the maximum power tracking photovoltaic energy charging controller, the push-pull converter and the full-bridge rectifier can work normally, and the power required by the load end is output, and the power of the load end is not interrupted.

9. The high frequency bi-directional photovoltaic energy inversion energy storage system of claim 8, wherein the analog controller and microcontroller B is further coupled with: