CN205882727U - Household Photovoltaic Energy Storage Power Controller - Google Patents

Abstract

The utility model discloses a household photovoltaic energy storage electric energy controller, which comprises a primary filter circuit (1), a DC/DC booster circuit (2), a DClink capacitor (3), a DC/AC inverter circuit (4), a secondary filter circuit (5), an electric energy distribution switch (6), a processor (7), an MPPT circuit (8), a primary voltage and current acquisition circuit (9), a DC/DC control circuit (10), a DC/AC control circuit (11), a secondary voltage and current acquisition circuit (12), a gate value setting circuit (13), an energy storage battery (14) and an electric equipment switch group (15); the utility model discloses can accurately judge solar energy power generation's output, energy storage battery's stock electric quantity, obtain domestic solar energy system's power supply ability, according to the consumer power of input and the priority level of closing, when the solar equipment power supply is not enough, close the consumer selectively, guarantee basic consumer and normally work.

Description

Household Photovoltaic Energy Storage Power Controller

technical field

The utility model relates to a solar energy conversion control device, in particular to a household photovoltaic energy storage electric energy controller, which belongs to the technical field of solar energy.

Background technique

At present, with the continuous growth of fossil energy consumption and the deterioration of the earth's ecological environment, countries all over the world are actively looking for a new energy source that is sustainable and non-polluting to the ecological environment. As an efficient and non-polluting new energy source, solar energy has become an important part of today's energy structure. Household solar power generation is an important direction for the application of solar power generation. Household solar power can not only guarantee family needs, but excess solar power can also be incorporated into the grid, which not only has economic benefits for families, but also generates commercial value.

Household solar photovoltaic power generation must first ensure the normal operation of household electrical equipment. However, due to the instability of solar energy, day and night, summer and winter, sunny days and rainy days are different. When the weather conditions are good, the power of solar photovoltaic power generation is high. , Far beyond the demand of household electrical equipment, this is excess electricity, which is used to charge energy storage equipment, and the second is to be incorporated into the grid. However, when encountering such weather conditions as continuous cloudy days, it is possible that the power of solar photovoltaic power generation cannot even meet the conditions of household electricity consumption. Once the power of the energy storage device is exhausted and the power of solar photovoltaic power generation is insufficient, the measures taken in the prior art are to cut off the power consumption, which brings inconvenience to family life.

Contents of the invention

The utility model provides a household photovoltaic energy storage power controller, which can detect the power of solar photovoltaic power generation and the power of energy storage equipment, and automatically shut down the power consumption equipment according to the power consumption priority according to the power of the household power consumption equipment. Guarantee the basic electricity demand of the family.

In order to achieve the above purpose, the utility model is a household photovoltaic energy storage electric energy controller, including a primary filter circuit, a DC/DC boost circuit, a DClink capacitor, a DC/AC inverter circuit, a secondary filter circuit, an electric energy distribution switch, a processing device, MPPT circuit, primary voltage and current acquisition circuit, DC/DC control circuit, DC/AC control circuit, secondary voltage and current acquisition circuit, threshold setting circuit, energy storage battery and electrical equipment switch group; After being filtered by the primary filter circuit, the DC voltage enters the DC/DC booster circuit for boosting, and then enters the DC/AC inverter circuit after being buffered by the DClink capacitor to be converted into AC voltage. After being filtered by the secondary filter circuit, it enters the power distribution switch, and the power distribution switch One way of electricity is sent to the switch group of electrical equipment, and the other way is sent to the energy storage battery; the processor detects the power of the solar battery group in real time through the MPPT circuit, and collects the voltage and current before conversion through the primary voltage and current acquisition circuit, and through the DC/DC The control circuit controls the DC/DC step-up circuit to complete the voltage conversion, and the DC/AC control circuit controls the DC/AC inverter circuit to complete the DC-AC conversion. The converted voltage and current are collected by the secondary voltage and current acquisition circuit, and the gate value setting circuit is used to collect the converted voltage and current. Set the closing conditions for closing each electrical equipment; control the switch of each electrical equipment through the electrical equipment switch group; the processor includes a discriminator, and the discriminator measures the power of the solar cell group according to the MPPT circuit and the acquisition result of the primary voltage and current acquisition circuit The calculated power before conversion, the converted power calculated by the acquisition results of the secondary voltage and current acquisition circuit, the power of the energy storage battery and the data set by the threshold setting circuit form control information and send it to the switch group of electrical equipment.

The utility model is based on the power of the solar battery group actually measured by the MPPT circuit, the power before conversion calculated by the acquisition result of the primary voltage and current acquisition circuit, the converted power calculated by the acquisition result of the secondary voltage and current acquisition circuit, the power of the energy storage battery and the setting of the threshold value setting circuit The data can accurately judge the output power of solar power generation and the storage power of the energy storage battery, and obtain the power supply capacity of the household solar system. According to the input power of electrical equipment and the priority level of shutdown, when the power supply of solar equipment is insufficient, there is a choice Turn off the electrical equipment in a timely manner to ensure the normal operation of the basic electrical equipment.

Description of drawings

Fig. 1 is a structural representation of the utility model;

In the figure: 1. Primary filter circuit, 2. DC/DC boost circuit, 3. DClink capacitor, 4. DC/AC inverter circuit, 5. Secondary filter circuit, 6. Power distribution switch, 7. DSP module, 8. MPPT circuit, 9. Primary voltage and current acquisition circuit, 10. DC/DC control circuit, 11. DC/AC control circuit, 12. Secondary voltage and current acquisition circuit, 13. Threshold value setting circuit, 14. Energy storage battery , 15, electrical equipment switch group, 16, electrical equipment, 20, solar battery pack.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, a household photovoltaic energy storage power controller includes a primary filter circuit 1, a DC/DC boost circuit 2, a DClink capacitor 3, a DC/AC inverter circuit 4, a secondary filter circuit 5, and a power distribution Switch 6, processor 7, MPPT circuit 8, primary voltage and current acquisition circuit 9, DC/DC control circuit 10, DC/AC control circuit 11, secondary voltage and current acquisition circuit 12, threshold setting circuit 13, energy storage battery 14 and electrical equipment switch group 15; the DC voltage generated by the solar battery group 20 is filtered by the primary filter circuit 1 and enters the DC/DC boost circuit 2 for boosting, and then enters the DC/AC inverter circuit 4 for conversion after being buffered by the DClink capacitor 3 The AC voltage is filtered by the secondary filter circuit 5 and enters the power distribution switch 6. The power distribution switch 6 sends the power to the switch group 15 of the electrical equipment one way, and the other way to the energy storage battery 14; the processor 7 passes the MPPT circuit 8 in real time. Detect the power of the solar cell group 20, collect the voltage and current before conversion through the primary voltage and current acquisition circuit 9, control the DC/DC boost circuit 2 through the DC/DC control circuit 10 to complete the voltage conversion, and control the voltage through the DC/AC control circuit 11 The DC/AC inverter circuit 4 completes the DC-AC conversion, collects the converted voltage and current through the secondary voltage and current acquisition circuit 12, and sets the closing conditions for closing each electrical equipment 16 through the threshold value setting circuit 13; through the electrical equipment switch group 15 Control the switches of each electrical equipment 16; the processor 7 includes a discriminator 71, and the discriminator 71 measures the power of the solar cell group 20 according to the MPPT circuit 8, the power before conversion calculated by the primary voltage and current acquisition circuit 9 acquisition results, and the secondary The voltage and current collection circuit 12 collects the converted power calculated by the result, the power of the energy storage battery (14) and the data set by the threshold value setting circuit (13), forms control information and sends it to the switch group 15 of electrical equipment.

The utility model is based on the power of the solar battery group actually measured by the MPPT circuit, the power before conversion calculated by the acquisition result of the primary voltage and current acquisition circuit, the converted power calculated by the acquisition result of the secondary voltage and current acquisition circuit, the power of the energy storage battery and the setting of the threshold value setting circuit The data can accurately judge the output power of solar power generation and the large inventory of structural energy storage batteries, and obtain the power supply capacity of the household solar system. According to the input power of electrical equipment and the priority level of shutdown, when the power supply of solar equipment is insufficient, by Selectively shut down electrical equipment to ensure the normal operation of the most basic electrical equipment.

Preferably, the energy storage battery 14 is a lithium battery pack with large capacity, small volume and good safety factor.

Preferably, the secondary filter circuit 5 is an LCL filter circuit, which is simple, practical and effective.

Claims (3)

1. A household photovoltaic energy storage electric energy controller, characterized in that it includes a primary filter circuit (1), a DC/DC boost circuit (2), a DClink capacitor (3), a DC/AC inverter circuit (4), Secondary filter circuit (5), power distribution switch (6), processor (7), MPPT circuit (8), primary voltage and current acquisition circuit (9), DC/DC control circuit (10), DC/AC control circuit (11), secondary voltage and current acquisition circuit (12), threshold value setting circuit (13), energy storage battery (14) and electrical equipment switch group (15); the DC voltage generated by the solar battery group (20) is passed through the primary The filter circuit (1) filters and enters the DC/DC boost circuit (2) to boost the voltage, and then enters the DC/AC inverter circuit (4) after being buffered by the DClink capacitor (3) to convert to AC voltage, which is passed through the secondary filter circuit ( 5) The filter enters the power distribution switch (6), and the power distribution switch (6) sends the power one way to the electrical equipment switch group (15), and the other way to the energy storage battery (14); the processor (7) passes the MPPT circuit (8) Detect the power of the solar cell group (20) in real time, collect the voltage and current before conversion through the primary voltage and current acquisition circuit (9), and control the DC/DC boost circuit (2) through the DC/DC control circuit (10) Complete the voltage conversion, control the DC/AC inverter circuit (4) through the DC/AC control circuit (11) to complete the DC-AC conversion, collect the converted voltage and current through the secondary voltage and current acquisition circuit (12), and pass the gate value setting circuit (13) Set the closing conditions for closing each electrical equipment (16); control the switch of each electrical equipment (16) through the electrical equipment switch group (15); the processor (7) includes a discriminator (71), which discriminates Converter (71) according to the power of the solar cell group (20) measured by the MPPT circuit (8), the power before conversion calculated by the acquisition results of the primary voltage and current acquisition circuit (9), and the conversion calculated by the acquisition results of the secondary voltage and current acquisition circuit (12) The power, the energy of the energy storage battery (14) and the data set by the threshold setting circuit (13) form control information and send it to the switch group (15) of the electrical equipment. 2. The household photovoltaic energy storage electric energy controller according to claim 1, characterized in that, the energy storage battery (14) is a lithium battery pack. 3. The household photovoltaic energy storage electric energy controller according to claim 2, characterized in that the secondary filter circuit (5) is an LCL filter circuit.