Photovoltaic water maker power supply used in island reef environment

Abstract

The invention discloses a photovoltaic water maker power supply used in an island reef environment. The photovoltaic water maker power supply comprises a photovoltaic panel (1), a reverse connection and backflow prevention circuit (2), a DC-DC step-down circuit (3), a DC-AC inverter circuit (4), an energy storage assembly (5), a DC side support capacitor (6) and an output isolation transformer (7). The power supply is especially suitable for high-salt and high-humidity environments of islands and reefs, can bear starting overload of a water maker, is suitable for short-time large-overload starting of the water maker, and is high in reliability.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power supply, and more specifically relates to a photovoltaic water generator power supply used in an island and reef environment. Background technique [0002] In the environment of islands and reefs, it is a relatively simple and reliable way to obtain fresh water by using compressed air to produce water or desalination equipment with atomization and condensation to produce water. The core of the water generator is the refrigeration compressor, which is driven by an asynchronous motor, so there is 5-7 times the starting current, and the duration is 1-3 seconds. The current mainstream photovoltaic inverter power supply is mainly aimed at the application of new energy grid-connected inverters. The typical topology is to invert after boosting the voltage to 300-400V and directly connect to the power grid. Although this type of photovoltaic inverter power supply It has the characteristics of s...

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Problems solved by technology

The current mainstream photovoltaic inverter power supply is mainly aimed at the application of new energy grid-connected inverters. The typical topology is to invert after boosting the voltage to 300-400V and directly connect to the power grid. Although this type of photovoltaic inverter power supply It has the characteristics of small size and low cost, but due to the existence of high-voltage DC links, moisture and salt spray will have an extremely adverse effect on the insulation of the high-voltage part in the island and reef environment; when using batteries as energy storage components, it is necessary to increase Additional charging and discharging circuits; this type of power supply design itself does not consider the starting current of the asynchronous motor, so the conventional photovoltaic inverter power supply is not suitable for photovoltaic water generators in island and reef environments

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