Chained cascade global self-synchronization solar photovoltaic power generation control device with inertia link and method

Abstract

The invention discloses a chained cascade global self-synchronization solar photovoltaic power generation control device with an inertia link. The chained cascade global self-synchronization solar photovoltaic power generation control device comprises a plurality of solar cell panel ultralow-voltage micro-source drawing silicon unit boosting circuits, an energy storage low-voltage synchronous rectification boosting circuit, an H-bridge superposed-wave chained cascade grid-connected circuit, a grid-connected control unit, an alternating-current voltage transformer and an alternating-current current transformer. Through adoption of a silicon unit parallel topological structure based on a low-voltage micro-source drawing technology, problems caused by excessive series connections of silicon units in a single photovoltaic cell panel are solved. Energy storage is adopted, so that a photovoltaic power generation system has an inertia link, and the problem of influence on a power grid caused by large photovoltaic power generation fluctuations is solved. A chained cascade superposed-wave grid-connection technology is adopted, so that the problem of harmonic waves generated by an inverter is solved without inversion grid connection. The chained cascade global self-synchronization solar photovoltaic power generation control device has the advantages of high overall power generation efficiency, smooth photovoltaic power generation output fluctuations, small harmonic waves and great significance.

Description

technical field [0001] The invention relates to solar photovoltaic power generation, in particular to a chain cascaded global self-synchronizing solar photovoltaic power generation control device and control method with inertial links. Background technique [0002] Energy is an important material basis for the survival and development of human beings, and it is also an important factor affecting national security. Traditional petrochemical energy is non-renewable energy and is facing the danger of depletion. On the other hand, due to the burning of fossil fuels, the atmosphere is heavily polluted. [0003] In order to solve the major problem of energy supply, countries all over the world have accelerated the development of new energy sources. As a clean energy, solar energy has the following characteristics: First, it is inexhaustible. Second, it is easily accessible and ubiquitous. Third, clean and pollution-free. [0004] The development and utilization of solar energ...

AI Technical Summary

Problems solved by technology

[0007] my country's photovoltaic power generation is mainly based on large-scale photovoltaic power plants. The centralized photovoltaic inverters or string photovoltaic inverters used generally have the problem of low energy efficiency of the battery panels, and at the same time, the service life of the battery panels is low due to the hot spot effect.

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