5kw Solar Panel Unit Generation

Solar energy system components,

Solar panel, combiner box, controller, battery, inverter.

Inverter for 5kw solar panel unit generation,

Description Of 5kw solar panel unit generation

In the solar power generation system, solar cell (photovoltaic) components and energy storage batteries generate and store energy for the power supply system, and the DC combiner box and grid-connected inverter are the control and protection systems, which make the power generation of photovoltaic modules controllable and ensure their normal operation. . Solar cell (photovoltaic) modules. Also known as a photovoltaic cell, it is an energy converter for solar photovoltaic power generation.

The principle is the photovoltaic effect, that is, when sunlight shines on the solar cell, the cell absorbs light energy and generates photo-generated electron-hole pairs; under the action of the built-in electric field of the cell, the photo-generated electrons and holes are separated, and the cell The accumulation of opposite-sex charges occurs at both ends, that is, a "photo-generated voltage" is generated; if the electrodes are drawn on both sides of the built-in electric field and the load is connected, the load will have a "photo-generated current" flowing, thereby obtaining power output; the light energy of the sun directly into usable electricity. At the same temperature, the greater the light intensity, the greater the open-circuit voltage and short-circuit current of the solar panel, and the greater the maximum output power. Monolithic solar cells cannot be used directly as a power source, and several monolithic cells must be connected in series or in parallel and packaged into components.

DC combiner box. It is a wiring device that ensures the orderly connection and confluence function of photovoltaic modules. The combiner box is composed of the box body, DC circuit breaker, DC fuse, anti-reverse diode, data acquisition module, protection unit, man-machine interface, and other main parts. It is used to reduce the connection between the photovoltaic array and the inverter, optimize the system structure, and improve reliability and maintainability. At the same time as confluence lightning protection, it also monitors the operation status of solar cell (photovoltaic) modules, current, voltage, power after confluence, lightning arrester status, DC circuit breaker status collection, relay contact output, and other functions, with wind speed, temperature, The sensor interface such as irradiator, and the standard data interface upload the measured and collected data to the monitoring system.

Open the grid inverter. The inverter is a power adjustment device composed of semiconductor devices, which is composed of a boost circuit and an inverter bridge circuit and is mainly used to convert direct current into alternating current. The boost circuit boosts the DC voltage of the solar cell to the DC voltage required for the inverter output control; the inverter bridge circuit converts the boosted DC voltage into an AC voltage with a common frequency equivalently. The inverter is mainly composed of switching elements such as transistors. By regularly switching the switching elements repeatedly, the output of DC power is changed to AC power. - Generally, it is necessary to use high-frequency pulse width modulation to narrow the voltage width near the two ends of the sine wave, widen the voltage width in the center of the sine wave, and always make the switching element move in the - direction at a certain frequency during the half cycle, so that A pulse wave train (quasi-sine wave), then pass the pulse wave through a simple filter to form a sine wave. The grid-connected inverter not only has the function of DC to AC conversion, but also has functions such as automatic operation and shutdown, and maximum power tracking control.

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