Single-inductor intelligent photovoltaic module and control method and photovoltaic system based on single-inductor intelligent photovoltaic module

Abstract

The invention discloses a single-inductor intelligent photovoltaic method, a control method and a photovoltaic system based on the photovoltaic module. The photovoltaic module comprises photovoltaic battery packs, electronic power switch arm pairs, capacitors, inductors and a maximum power tracing unit, wherein a switching network is formed by parallel connection of each electronic power switch arm pair and each capacitor, each switching network is in parallel connection with two ends of each photovoltaic battery pack, output ends of the switching networks are sequentially in serial connection and then are in serial connection with the unification output inductors, each switching network is provided with a closed control circuit, the maximum power tracing unit collects current and voltage signals output by a photovoltaic optimizer and then transmits the signals to each control circuit of each switching network to guarantee that each photovoltaic battery pack works on the maximum power output point under any external lighting conditions, and output power of a photovoltaic solar system under mismatch lighting conditions is extremely improved.

Description

【Technical field】 [0001] The invention belongs to the research field of solar photovoltaic power generation, and in particular relates to a circuit structure of a novel intelligent photovoltaic module and a control method thereof. 【Background technique】 [0002] As a clean, non-polluting, inexhaustible and inexhaustible renewable energy, solar energy has attracted more and more attention from the society in today's rapid development. However, due to its high investment costs, low output efficiency, and unstable output energy, how to maximize the use of energy generated by photovoltaic solar panels has become a decisive factor in determining the development of the photovoltaic industry. The solar panel is the core part of the solar power generation system, and it is also the most valuable part of the solar power generation system. Its function is to convert the radiation ability of the sun into electrical energy, which is supplied to the grid or users. The quality and cost ...

AI Technical Summary

Problems solved by technology

[0005] 3) The output characteristics of the entire system appear "multi-peak" characteristic curves, which affect the normal operation of grid-connected equipment;

[0006] 4) The system oscillates, which will affect the stability of the power grid in severe cases

[0007] 5) In severe cases, it will affect the power quality of the entire grid

This method is based on high-precision detection links, precise regulator design and complex control procedures. The reliability of the system is poor, and it cannot be widely adopted by the industry at present.

Moreover, even if the global maximum power point of the entire photovoltaic system can be found through some complex algorithm, it still cannot reach the maximum output power point of the system theory, which seriously affects the output efficiency of the entire photovoltaic solar energy system, so it does not fundamentally solve the problem

Images