CN209748258U

CN209748258U - photovoltaic commercial power complementary type charging device

Info

Publication number: CN209748258U
Application number: CN201822152136.0U
Authority: CN
Inventors: 张志荣; 黄小娜
Original assignee: Hexi University
Current assignee: Hexi University
Priority date: 2018-12-19
Filing date: 2018-12-19
Publication date: 2019-12-06
Anticipated expiration: 2028-12-19

Abstract

The utility model discloses a photovoltaic commercial power complementary type charging device, include: the device comprises a DSP controller, a photovoltaic voltage and current acquisition module, a photovoltaic cell panel, a commercial power interface unit, an alternating current detection module, a storage battery voltage acquisition module, an optical coupling isolation module and a relay; in addition, including dc-to-ac converter, transformer and control switching module circuit, the utility model discloses use photovoltaic cell board as main power supply, realize the switching between the power, switching order preference photovoltaic supplies power, secondly by the commercial power supply, last by the battery power supply, both practiced thrift the energy, very big improvement the stability of power supply again.

Description

Photovoltaic commercial power complementary type charging device

Technical Field

The utility model relates to a power intelligence switching control technical field, concretely relates to complementary type charging device of photovoltaic commercial power.

Background

At present, as the demand and development of education informatization are needed and developed, classrooms and libraries of schools are provided with equipment such as computers, projectors and the like, and additionally, electric equipment such as air conditioners, fans, illuminating lamps and the like is added, so that the teaching and learning environment of teachers and students is better met and improved, but also easily causes the waste of power resources, in the electric equipment for teaching, the lamp is the most easily caused part of the waste of power resources, the lamp generally has two functions of illumination (when no natural light exists) and light supplement (when the natural light is insufficient), most lamps used in the current classrooms or multimedia classrooms are fluorescent lamps, and is uniformly distributed, while natural light is non-uniformly distributed in a classroom, so that the current lighting mode necessarily produces partial over-lighting, meanwhile, the situations that the user forgets to pull the curtain to use the lamp for lighting after using the projection and forgets to turn off the electric equipment of the user when the user finishes using the classroom often occur.

Energy conservation and emission reduction are concerned about not only the future of the country but also the whole mankind, solar energy is the most huge renewable energy source, the solar energy radiated to the earth surface every day is about 2.5 billion barrels of petroleum, all daily energy requirements of the world can be completely met theoretically, and the vigorous development and utilization of solar energy is an effective measure for increasing pollution-free energy supply.

therefore, how to provide a photovoltaic and commercial power complementary charging device for schools is a problem that needs to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a photovoltaic commercial power complementary type charging system that power supply is stable, the energy saving.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

A photovoltaic commercial power complementary type charging device comprises: the device comprises a DSP controller, a photovoltaic voltage and current acquisition module, a photovoltaic cell panel, a commercial power interface unit, an alternating current detection module, a storage battery voltage acquisition module, an optical coupling isolation module and a relay;

the DSP controller obtains a voltage current signal of the photovoltaic cell panel through the photovoltaic voltage current acquisition module and calculates power provided by the photovoltaic cell panel;

The alternating current detection module acquires a voltage signal of the commercial power interface unit and transmits the voltage signal to the DSP controller, and the DSP controller calculates and judges whether commercial power is normal or not;

the storage battery voltage acquisition module acquires a voltage current signal of a storage battery and sends the voltage current signal to the DSP controller;

and the DSP controller controls the relay after passing through the optical coupling isolation module, so that the power supply source of the load is controlled.

Preferably, the system also comprises an inverter and a transformer, wherein a terminal of the storage battery is connected with an input end of the inverter, an output end of the inverter is connected with a primary winding of the transformer, and a secondary winding of the transformer is connected with the relay.

Preferably, still include control switching module circuit, control switching module circuit includes signal isolation driver chip, interface circuit and output interface, the DSP controller with control signal output to signal isolation driver chip, signal output after isolating the amplification reaches 3 the relay, 3 the relay corresponds three kinds of modes of control solar energy power supply, commercial power supply, battery power supply respectively, wherein three routes supply source is by interface circuit input to select one of them all the way to output interface for the load power supply finally.

Preferably, a direct current support capacitor C1 is connected in parallel between the battery and the inverter, an inductor L1 is connected in series between the inverter and the primary winding of the transformer, an inductor L2 and a capacitor C2 are connected in series between the secondary winding of the transformer, and the capacitor C2 is connected in parallel with a load.

Preferably, the DSP controller is provided with an AD detection interface inside.

Preferably, the DSP controller adopts a C8051F singlechip.

according to the above technical scheme, compare with prior art, the utility model discloses use photovoltaic cell board as main power supply, realize switching between the power, switching sequence preference photovoltaic supplies power, secondly by the commercial power supply, by the battery power supply at last, solar energy itself not only green but also zero cost replaces the electric wire netting power supply will produce huge economic benefits simultaneously. The energy is saved, and the power supply stability is greatly improved, so that the loss caused by power failure is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

fig. 1 is a block diagram of the photovoltaic and commercial power complementary charging device of the present invention.

Fig. 2 is a block diagram of the structure of the control switching module of the present invention.

Wherein:

the system comprises a DSP (digital signal processor) controller 1, a photovoltaic voltage and current acquisition module 2, a photovoltaic cell panel 3, a commercial power interface unit 4, an alternating current detection module 5, a storage battery 6, a storage battery 7, a storage battery voltage acquisition module 8, an optical coupling isolation module 9, a relay 10, an inverter 11, a transformer 12, a signal isolation driving chip 13, an interface circuit 14 and an output interface 14.

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 work belong to the protection scope of the present invention.

The embodiment of the utility model discloses photovoltaic commercial power complementary type charging device, include: the system comprises a DSP controller 1, a photovoltaic voltage and current acquisition module 2, a photovoltaic cell panel 3, a mains supply interface unit 4, an alternating current detection module 5, a storage battery 6, a storage battery voltage acquisition module 7, an optical coupling isolation module 8 and a relay 9;

The DSP controller 1 can adopt a C8051F singlechip, obtains a voltage and current signal of the photovoltaic cell panel 3 through the photovoltaic voltage and current acquisition module 2, and adopts a built-in ADE7878 electric energy metering chip to calculate the power provided by the photovoltaic cell panel 3;

The alternating current detection module 5 acquires a voltage signal of the commercial power interface unit 4 and transmits the voltage signal to the DSP controller 1, and the DSP controller 1 calculates and judges whether the commercial power is normal or not;

the storage battery voltage acquisition module 7 acquires a voltage current signal of the storage battery 6 and sends the voltage current signal to the DSP controller 1;

the DSP controller 1 controls a relay 9 after passing through an optical coupling isolation module 8, thereby controlling the power supply source of the load.

Advantageously, the system also comprises an inverter 10 and a transformer 11, wherein the terminals of the storage battery 6 are connected with the input end of the inverter 10, the output end of the inverter 10 is connected with the primary winding of the transformer 11, and the secondary winding of the transformer 11 is connected with the relay 9.

The solar energy power supply system further comprises a control switching module circuit, the control switching module circuit comprises a DSP controller 1, a signal isolation driving chip 12, an interface circuit 13 and an output interface 14, the DSP controller 1 outputs a control signal to the signal isolation driving chip 12, the signal after isolation and amplification is output to 3 relays 9, the 3 relays 9 respectively and correspondingly control three modes of solar energy power supply, commercial power supply and storage battery power supply, wherein three supply sources are input through the interface circuit 13, and one supply source is finally selected to be output to the output interface 14 to supply power to a load.

Advantageously, a direct current support capacitor C1 is connected in parallel between the battery 6 and the inverter 10, an inductor L1 is connected in series between the inverter 10 and the primary winding of the transformer 11, an inductor L2 and a capacitor C2 are connected in series between the secondary winding of the transformer 11, and the capacitor C2 is connected in parallel with the load.

in some embodiments, the output end of the alternating current (mains supply) detection module is connected with the built-in AD detection interface of the DSP controller; the output end of the storage battery voltage acquisition module is connected with the built-in AD detection interface of the DSP. Data are collected in real time through the AD module, whether sunlight intensity and commercial power exist or not are detected, the intelligent automatic switching is achieved to be supplied by the commercial power under the conditions that the illumination is weak or rainy weather and at night occur, and if the commercial power suddenly occurs unexpected events such as power failure or unstable voltage, the automatic switching is achieved to be supplied by a standby storage battery.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A photovoltaic commercial power complementary charging device is characterized by comprising: the device comprises a DSP controller, a photovoltaic voltage and current acquisition module, a photovoltaic cell panel, a commercial power interface unit, an alternating current detection module, a storage battery voltage acquisition module, an optical coupling isolation module and a relay;

The alternating current detection module acquires a voltage signal of the commercial power interface unit, transmits the voltage signal to the DSP controller, and the DSP controller calculates and judges whether commercial power is normal or not;

the storage battery voltage acquisition module acquires a voltage current signal of a storage battery and transmits the voltage current signal to the DSP controller;

The DSP controller sends a command to the relay after passing through the optical coupling isolation module, so that the switching of a power supply source is controlled;

The terminal of the storage battery is connected with the input end of the inverter, the output end of the inverter is connected with the primary winding of the transformer, and the secondary winding of the transformer is connected with the relay; a direct current supporting capacitor C1 is connected in parallel between the storage battery and the inverter, an inductor L1 is connected in series between the inverter and the primary winding of the transformer, an inductor L2 and a capacitor C2 are connected in series between the secondary winding of the transformer, and the capacitor C2 is connected in parallel with a load;

Still including control switching module circuit, control switching module circuit includes DSP controller, signal isolation driver chip, interface circuit and output interface, the DSP controller exports control signal extremely signal isolation driver chip, and signal output after isolating the amplification is to 3 the relay, 3 the relay corresponds three kinds of modes of control solar energy power supply, commercial power supply, battery power supply respectively, and wherein three routes supply source is by interface circuit input to it supplies power for the load to select wherein one of them all the way to output interface finally.

2. The photovoltaic utility power complementary charging device as claimed in claim 1, wherein an AD detection interface is built in the DSP controller.

3. The photovoltaic commercial power complementary charging device according to claim 1, wherein the DSP controller is a C8051F single chip microcomputer.