CN210041750U

CN210041750U - Solar photovoltaic inverter

Info

Publication number: CN210041750U
Application number: CN201920914328.2U
Authority: CN
Inventors: 丁学用; 苏红瑞; 王旭龙; 周贺权
Original assignee: SANYA UNIVERSITY
Current assignee: SANYA UNIVERSITY
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-02-07
Anticipated expiration: 2029-06-18

Abstract

The utility model discloses a solar photovoltaic inverter relates to photovoltaic technology field, has solved that current inverter controller output voltage waveform is unsatisfactory, the wave weight is big and the distortion is great and its circuit of digital sine wave inverter controller is complicated and the higher problem of cost, and its technical scheme main points are: the solar photovoltaic inverter comprises a solar controller, a solar photovoltaic panel, a storage battery pack and an inverter controller, wherein the solar photovoltaic panel, the storage battery pack and the inverter controller are electrically connected with the solar controller; the inverter controller comprises an inverter circuit, a filter circuit and a booster circuit; the effects of improving the practicability and reducing the cost are achieved.

Description

Solar photovoltaic inverter

Technical Field

The utility model relates to a photovoltaic technology field, more specifically say, it relates to a solar photovoltaic inverter.

Background

The solar charging technology is a technology for converting solar energy into electric energy, and the electric energy is converted from the solar energy and then stored in a storage battery; since the end of the last century, intensive research has been carried out in various countries, the technology is tightly combined with leading-edge theory, the problems of energy shortage and environmental pollution are more and more serious, and more countries implement sustainable energy strategies, so that the aspect of photovoltaic power generation is spotlighted.

The solar photovoltaic power generation technology is safe and reliable, no pollutant is generated in the production and power generation process, fossil fuel is not required to be combusted, mechanical parts are not required to be matched for operation, faults are not easy to occur in the production process, and the later production and maintenance are easy, so that solar energy research is increased in various countries in the world; as a main force of the modern new energy industry, the solar photovoltaic inverter controller is currently researched into two types: one is a square wave inversion controller, and the other is a quasi-sine wave inversion controller; the two inverter controllers have the advantages that the circuit composition is simple, the implementation is easy, the defects are obvious, the output voltage waveform is not particularly ideal, the harmonic component is large, the distortion is large, the output voltage waveform is not a standard sine wave, and meanwhile, the size is large, the use is inconvenient, and the good effect cannot be achieved in circuits with inductive elements such as fans and motors. The digitized sine wave inverter controller with better waveform output has complex circuit and higher cost.

Therefore, how to design a solar photovoltaic inverter is a problem which is urgently needed to be solved at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a solar photovoltaic inverter has the distortion that reduces the voltage waveform and the nimble purpose of dismantling, reaches the effect that improves its practicality and reduce cost.

The above technical purpose of the present invention can be achieved by the following technical solutions: the solar photovoltaic inverter comprises a solar controller, a solar photovoltaic panel, a storage battery pack and an inverter controller, wherein the solar photovoltaic panel, the storage battery pack and the inverter controller are electrically connected with the solar controller; the inverter controller comprises an inverter circuit, a filter circuit and a booster circuit.

By adopting the technical scheme, the solar photovoltaic panel, the storage battery pack and the inverter controller are utilized, so that solar energy is converted into electric energy and then stored in the storage battery pack for the need from time to time; or the direct current is transmitted into the inverter controller to convert the direct current into AC alternating current meeting the requirements of household appliances, so that the direct current is convenient for people to use in actual life; the solar controller is used for conveniently collecting direct current input to the inverter controller and alternating current output by the inverter controller, effectively controlling the inverter controller according to collected data, stabilizing the direct current voltage output by the front stage, providing stable direct current voltage for the rear stage, ensuring the normal use of the storage battery and the inverter system, and simultaneously outputting 5V direct current.

The utility model discloses further set up to: the inverter circuit comprises a converter JP1, a voltage input end, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R9, a resistor R10, a resistor R11, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5 and a diode D1; the No. 2 pin of the voltage input end is connected with a resistor R6, the resistor R6 is connected with the input end of a diode D1, and the output end of the diode D1 is connected with the No. 15 pin of the converter JP 1; the No. 2 pin of the voltage input end is connected with the input end of a capacitor C2, and the output end of the capacitor C2 is respectively connected with the No. 13 pin of the converter JP1 and the No. 15 pin of the converter JP 1; the No. 2 pin of the voltage input end is connected with the input end of a capacitor C3, the output end of the capacitor C3 is connected with the No. 5 pin of a converter JP1, the output end of the capacitor C3 is connected with a resistor R5 in parallel, and the resistor R5 is connected to the No. 7 pin of the converter JP 1; the No. 2 pin of the voltage input end is connected with a resistor R1, and the resistor R1 is connected to the No. 1 pin of the converter JP 1; the No. 2 pin of the voltage input end is connected with a resistor R2, and the resistor R2 is connected to the No. 2 pin of the converter JP 1; the resistor R4 is connected with the resistor R2 in parallel, and the resistor R4 is connected to a No. 6 pin of the converter JP 1; the No. 1 pin of the voltage input end is connected with the anode of a capacitor C5, the cathode of the capacitor C5 is connected with a resistor R9, and the resistor R9 is connected to the No. 11 pin of the converter JP 1; the negative electrode of the capacitor C5 is connected with a resistor R10, and the resistor R10 is connected to a No. 14 pin of a converter JP 1; the negative electrode of the capacitor C5 is connected with a resistor R5, and the resistor R5 is connected to a No. 10 pin of a converter JP 1; the negative electrode of the capacitor C5 is connected with the negative electrode of the capacitor C4, and the positive electrode of the capacitor C4 is connected with a No. 8 pin of a converter JP 1; the No. 16 pin of the converter JP1 is connected with a resistor R11, and the R11 is connected to the No. 2 pin of the converter JP 1.

By adopting the technical scheme, the DC direct current is conveniently converted into the AC alternating current by utilizing the inverter circuit.

The utility model discloses further set up to: the filter circuit comprises an effect tube JP2, an effect tube JP3, an effect tube JP4, an effect tube JP5 and a resistor R8; the No. 12 pin of the converter JP1 is connected with a resistor R8, and the resistor R8 is respectively connected with the No. 1 pin of the effect tube JP4 and the No. 1 pin of the effect tube JP 5; the negative electrode of the capacitor C4 is respectively connected with the pin 1 of the effect tube JP2 and the pin 1 of the effect tube JP 3; pin 2 of the effect tube JP2 is connected with pin 2 of the effect tube JP 3; pin 2 of the effect tube JP4 is connected to pin 2 of effect tube JP 5.

By adopting the technical scheme, the filter circuit is utilized, the distortion of the AC alternating current is reduced, and the problem that some inductive elements such as fans and motors cannot achieve good effects in the circuit is avoided.

The utility model discloses further set up to: the boosting circuit comprises a transformer EC42, a capacitor C1 and a resistor R7; the positive electrode of the capacitor C5 is respectively connected to a pin No. 7 of the transformer EC42 and a pin No. 9 of the transformer EC 42; the No. 2 pin of the effect tube JP5 is connected with the input end of a capacitor C1, the output end of the capacitor C1 is connected with a resistor R7, and the resistor R7 is respectively connected to the No. 13 pin of a transformer EC42 and the No. 15 pin of a transformer EC 42; the No. 2 pin of the effect tube JP2 is respectively connected to the No. 13 pin of the transformer EC42 and the No. 15 pin of the transformer EC 42; the No. 2 pin of the effect tube JP5 is connected with the input end of a capacitor C1, and the input end of the capacitor C1 is respectively connected with the No. 1 pin of the transformer EC42 and the No. 3 pin of the transformer EC 42.

By adopting the technical scheme, the boosting circuit is utilized, so that the alternating current converted and output by the inverter circuit can be conveniently boosted to the standard of household common power and boosted to the alternating current 220 negative, and the household use is conveniently realized.

The utility model discloses further set up to: the resistance R1 is 10K ohm, the resistance R2 is 10K ohm, the resistance R3 is 10K ohm, the resistance R4 is 3.3K ohm, the resistance R5 is 100 ohm, the resistance R6 is 10K ohm, the resistance R7 is 10K ohm, the resistance R8 is 10K ohm, the resistance R9 is 5.1 ohm, the resistance R10 is 5.1 ohm, and the resistance R11 is 10K ohm; the capacitance C1 is 103 Farad, the capacitance C2 is 104 Farad, the capacitance C3 is 104 Farad, the capacitance C4 is 1 microfarad, and the capacitance C5 is 4700 microfarad.

Through adopting above-mentioned technical scheme, the circuit can be better the operation, prevents that the operation process from appearing the short circuit or the electric current is too big to damage some components and parts, lead to normally working.

To sum up, the utility model discloses following beneficial effect has: the solar photovoltaic panel, the storage battery pack and the inverter controller are utilized to convert solar energy into electric energy and store the electric energy in the storage battery pack for the need from time to time; or the direct current is transmitted into the inverter controller to convert the direct current into AC alternating current meeting the requirements of household appliances, so that the direct current is convenient for people to use in actual life; the solar controller is used for conveniently collecting direct current input to the inversion controller and alternating current output by the inversion controller, effectively controlling the inversion controller according to collected data, stabilizing the direct current voltage output by the front stage, providing stable direct current voltage for the rear stage, ensuring the normal use of a storage battery and an inversion system, and simultaneously outputting 5V direct current; the inverter circuit is utilized to convert DC direct current into AC alternating current conveniently; by using the filter circuit, the distortion of AC alternating current is reduced, and inductive elements such as fans, motors and the like are prevented from failing to achieve good effects in the circuit.

Drawings

Fig. 1 is a connection block diagram in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the inverter circuit, the filter circuit and the boost circuit in the embodiment of the present invention.

In the figure: 1. a solar controller; 2. a solar photovoltaic panel; 3. a battery pack; 4. an inverter controller; 41. an inverter circuit; 42. a filter circuit; 43. a booster circuit.

Detailed Description

The present invention will be described in further detail with reference to the accompanying fig. 1-2.

Example (b): a solar photovoltaic inverter is shown in figures 1 and 2 and comprises a solar controller 1, a solar photovoltaic panel 2 electrically connected with the solar controller 1, a storage battery pack 3 and an inverter controller 4; the inverter controller 4 includes an inverter circuit 41, a filter circuit 42, and a booster circuit 43. The solar photovoltaic panel 2, the storage battery pack 3 and the inverter controller 4 are utilized to convert solar energy into electric energy, and then the electric energy is stored in the storage battery pack 3 for the need from time to time; or the direct current is transmitted into the inverter controller 4 to be converted into the AC alternating current meeting the requirements of the household electrical appliances, so that the direct current is convenient for people to use in actual life; by utilizing the solar controller 1, the direct current input to the inversion controller 4 and the alternating current output by the inversion controller 4 can be conveniently collected, the inversion controller 4 is effectively controlled according to the collected data, the direct current voltage output by the front stage is stabilized, the stable direct current voltage is provided for the rear stage, the normal use of the storage battery and the inversion system is ensured, and meanwhile, the 5V direct current can be output. In this embodiment, solar control ware 1, solar photovoltaic board 2, storage battery 3 and contravariant controller 4 can be dismantled in a flexible way, can utilize solar panel alone to charge to the battery part, also can only use battery and contravariant controller 4 parts to carry out the contravariant output, and the design is nimble various, conveniently carries out the part after single part damages and changes, has improved the convenience of using, simultaneously greatly reduced the cost.

As shown in fig. 2, the inverter circuit 41 includes a converter JP1, a voltage input terminal, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R9, a resistor R10, a resistor R11, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, and a diode D1; the No. 2 pin of the voltage input end is connected with a resistor R6, a resistor R6 is connected with the input end of a diode D1, and the output end of a diode D1 is connected with the No. 15 pin of the converter JP 1; the No. 2 pin of the voltage input end is connected with the input end of the capacitor C2, and the output end of the capacitor C2 is respectively connected with the No. 13 pin of the converter JP1 and the No. 15 pin of the converter JP 1; the No. 2 pin of the voltage input end is connected with the input end of a capacitor C3, the output end of a capacitor C3 is connected with the No. 5 pin of a converter JP1, the output end of the capacitor C3 is connected with a resistor R5 in parallel, and a resistor R5 is connected to the No. 7 pin of the converter JP 1; the No. 2 pin of the voltage input end is connected with a resistor R1, and a resistor R1 is connected to the No. 1 pin of the converter JP 1; the No. 2 pin of the voltage input end is connected with a resistor R2, and a resistor R2 is connected to the No. 2 pin of the converter JP 1; the resistor R4 is connected with the resistor R2 in parallel, and the resistor R4 is connected to the No. 6 pin of the converter JP 1; the No. 1 pin of the voltage input end is connected with the anode of a capacitor C5, the cathode of a capacitor C5 is connected with a resistor R9, and a resistor R9 is connected to the No. 11 pin of a converter JP 1; the negative electrode of the capacitor C5 is connected with the resistor R10, and the resistor R10 is connected to the No. 14 pin of the converter JP 1; the negative electrode of the capacitor C5 is connected with the resistor R5, and the resistor R5 is connected to the No. 10 pin of the converter JP 1; the negative electrode of the capacitor C5 is connected with the negative electrode of the capacitor C4, and the positive electrode of the capacitor C4 is connected with the No. 8 pin of the converter JP 1; the No. 16 pin of the converter JP1 is connected with the resistor R11, and the R11 is connected to the No. 2 pin of the converter JP 1. The DC direct current is conveniently converted to AC alternating current by an inverter circuit 41. In the embodiment, the converter adopts an SG3525 chip, so that the working voltage range is wide, and the precision is high; meanwhile, a plurality of soft start switches are arranged in SG3525, self-protection is carried out when the chip is abnormal, the internal oscillation frequency range is wide, the locking function of PWM is achieved, and the multi-pulse phenomenon is prevented.

As shown in fig. 2, the filter circuit 42 includes a fet JP2, a fet JP3, a fet JP4, a fet JP5, and a resistor R8; a 12 pin of the converter JP1D is connected with a resistor R8, and a resistor R8 is respectively connected with a 1 pin of the effect tube JP4 and a 1 pin of the effect tube JP 5; the negative electrode of the capacitor C4 is respectively connected with the pin 1 of the effect tube JP2 and the pin 1 of the effect tube JP 3; pin 2 of effect tube JP2 is connected with pin 2 of effect tube JP 3; pin 2 of effect tube JP4 is connected to pin 2 of effect tube JP 5. By using the filter circuit 42, the distortion of the AC power is reduced, and some inductive elements such as fans and motors are prevented from failing to achieve good effects in the circuit. In this embodiment, the effect transistor adopts an IRF3205 chip, which can perform switching, oscillating, and boosting functions in the circuit, and can be widely applied to this type of circuit due to its high efficiency and reliability. The chip has extremely low on-resistance and higher conversion efficiency and manufacturing process.

As shown in fig. 2, the voltage boosting circuit 43 includes a transformer EC42, a capacitor C1, and a resistor R7; the positive electrode of the capacitor C5 is respectively connected to a pin No. 7 of the transformer EC42 and a pin No. 9 of the transformer EC 42; a No. 2 pin of the effect tube JP5 is connected with an input end of a capacitor C1, an output end of a capacitor C1 is connected with a resistor R7, and the resistor R7 is respectively connected with a No. 13 pin of a transformer EC42 and a No. 15 pin of a transformer EC 42; the No. 2 pin of the effect tube JP2 is respectively connected to the No. 13 pin of the transformer EC42 and the No. 15 pin of the transformer EC 42; no. 2 pin of the effect tube JP5 is connected with the input end of the capacitor C1, and the input end of the capacitor C1 is respectively connected with the No. 1 pin of the transformer EC42 and the No. 3 pin of the transformer EC 42. By utilizing the boosting circuit 43, the alternating current converted and output by the inverter circuit 41 is conveniently boosted to the standard of household common power and boosted to the alternating current 220 negative, so that the household use is conveniently realized. In the embodiment, the transformer adopts an EC42 high-frequency transformer, and is economical and practical.

As shown in fig. 2, the resistor R1 is 10K ohms, the resistor R2 is 10K ohms, the resistor R3 is 10K ohms, the resistor R4 is 3.3K ohms, the resistor R5 is 100 ohms, the resistor R6 is 10K ohms, the resistor R7 is 10K ohms, the resistor R8 is 10K ohms, the resistor R9 is 5.1 ohms, the resistor R10 is 5.1 ohms, and the resistor R11 is 10K ohms; the capacitance C1 was 103 farads, the capacitance C2 was 104 farads, the capacitance C3 was 104 farads, the capacitance C4 was 1 microfarad, and the capacitance C5 was 4700 microfarads. The circuit can better operate, and the phenomenon that certain components are damaged and cannot normally work due to short circuit or overlarge current in the operation process is prevented.

The working principle is as follows: the solar photovoltaic panel 2, the storage battery pack 3 and the inverter controller 4 are utilized to convert solar energy into electric energy, and then the electric energy is stored in the storage battery pack 3 for the need from time to time; or the direct current is transmitted into the inverter controller 4 to be converted into the AC alternating current meeting the requirements of the household electrical appliances, so that the direct current is convenient for people to use in actual life; by utilizing the solar controller 1, the direct current input to the inversion controller 4 and the alternating current output by the inversion controller 4 can be conveniently collected, the inversion controller 4 is effectively controlled according to the collected data, the direct current voltage output by the front stage is stabilized, the stable direct current voltage is provided for the rear stage, the normal use of the storage battery and the inversion system is ensured, and meanwhile, the 5V direct current can be output.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A solar photovoltaic inverter is characterized in that: the solar photovoltaic inverter comprises a solar controller (1), a solar photovoltaic panel (2) electrically connected with the solar controller (1), a storage battery pack (3) and an inverter controller (4); the inverter controller (4) comprises an inverter circuit (41), a filter circuit (42) and a booster circuit (43);

the inverter circuit (41) comprises a converter JP1, a voltage input end, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R9, a resistor R10, a resistor R11, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5 and a diode D1; the No. 2 pin of the voltage input end is connected with a resistor R6, the resistor R6 is connected with the input end of a diode D1, and the output end of the diode D1 is connected with the No. 15 pin of the converter JP 1; the No. 2 pin of the voltage input end is connected with the input end of a capacitor C2, and the output end of the capacitor C2 is respectively connected with the No. 13 pin of the converter JP1 and the No. 15 pin of the converter JP 1; the No. 2 pin of the voltage input end is connected with the input end of a capacitor C3, the output end of the capacitor C3 is connected with the No. 5 pin of a converter JP1, the output end of the capacitor C3 is connected with a resistor R5 in parallel, and the resistor R5 is connected to the No. 7 pin of the converter JP 1; the No. 2 pin of the voltage input end is connected with a resistor R1, and the resistor R1 is connected to the No. 1 pin of the converter JP 1; the No. 2 pin of the voltage input end is connected with a resistor R2, and the resistor R2 is connected to the No. 2 pin of the converter JP 1; the resistor R4 is connected with the resistor R2 in parallel, and the resistor R4 is connected to a No. 6 pin of the converter JP 1; the No. 1 pin of the voltage input end is connected with the anode of a capacitor C5, the cathode of the capacitor C5 is connected with a resistor R9, and the resistor R9 is connected to the No. 11 pin of the converter JP 1; the negative electrode of the capacitor C5 is connected with a resistor R10, and the resistor R10 is connected to a No. 14 pin of a converter JP 1; the negative electrode of the capacitor C5 is connected with a resistor R5, and the resistor R5 is connected to a No. 10 pin of a converter JP 1; the negative electrode of the capacitor C5 is connected with the negative electrode of the capacitor C4, and the positive electrode of the capacitor C4 is connected with a No. 8 pin of a converter JP 1; the No. 16 pin of the converter JP1 is connected with a resistor R11, and the R11 is connected to the No. 2 pin of the converter JP 1.

2. The solar photovoltaic inverter according to claim 1, wherein: the filter circuit (42) comprises an effect tube JP2, an effect tube JP3, an effect tube JP4, an effect tube JP5 and a resistor R8; the No. 12 pin of the converter JP1 is connected with a resistor R8, and the resistor R8 is respectively connected with the No. 1 pin of the effect tube JP4 and the No. 1 pin of the effect tube JP 5; the negative electrode of the capacitor C4 is respectively connected with the pin 1 of the effect tube JP2 and the pin 1 of the effect tube JP 3; pin 2 of the effect tube JP2 is connected with pin 2 of the effect tube JP 3; pin 2 of the effect tube JP4 is connected to pin 2 of effect tube JP 5.

3. The solar photovoltaic inverter according to claim 2, wherein: the boosting circuit (43) comprises a transformer EC42, a capacitor C1 and a resistor R7; the positive electrode of the capacitor C5 is respectively connected to a pin No. 7 of the transformer EC42 and a pin No. 9 of the transformer EC 42; the No. 2 pin of the effect tube JP5 is connected with the input end of a capacitor C1, the output end of the capacitor C1 is connected with a resistor R7, and the resistor R7 is respectively connected to the No. 13 pin of a transformer EC42 and the No. 15 pin of a transformer EC 42; the No. 2 pin of the effect tube JP2 is respectively connected to the No. 13 pin of the transformer EC42 and the No. 15 pin of the transformer EC 42; the No. 2 pin of the effect tube JP5 is connected with the input end of a capacitor C1, and the input end of the capacitor C1 is respectively connected with the No. 1 pin of the transformer EC42 and the No. 3 pin of the transformer EC 42.

4. The solar photovoltaic inverter according to claim 3, wherein: the resistance R1 is 10K ohm, the resistance R2 is 10K ohm, the resistance R3 is 10K ohm, the resistance R4 is 3.3K ohm, the resistance R5 is 100 ohm, the resistance R6 is 10K ohm, the resistance R7 is 10K ohm, the resistance R8 is 10K ohm, the resistance R9 is 5.1 ohm, the resistance R10 is 5.1 ohm, and the resistance R11 is 10K ohm; the capacitance C1 is 103 Farad, the capacitance C2 is 104 Farad, the capacitance C3 is 104 Farad, the capacitance C4 is 1 microfarad, and the capacitance C5 is 4700 microfarad.