What Are The Design Highlights of Solar Hybrid Inverters?

The Solar hybrid inverter is one of the core components of a solar power system, which is responsible for converting the DC power generated by the PV panels into AC power for home use or for converting the solar energy into DC power to be stored in batteries for emergency use. The Solar hybrid inverter converts the unstable DC output from the solar panels into stable AC power that meets the requirements of the grid through power electronic conversion technology. This process usually includes steps such as DC-DC conversion, maximum power point tracking (MPPT), and DC-AC conversion. The aim of this paper is to discuss the main highlights of the design of a Solar hybrid inverter.

Maximum Power Point Tracking (MPPT)

Technical principle: The MPPT algorithm can automatically adjust the operating point according to changes in light intensity and temperature to ensure that the PV panels always operate near their maximum power point.

Realisation: Common MPPT methods include perturbation observation method, conductivity increment method, etc.

Connecting storage batteries

Lithium and lead-acid batteries can be connected

Solar energy is converted into electricity, enabling charging and use at the same time.

Efficiency optimisation

Hardware selection: Selection of high-efficiency power electronic components, such as IGBT and MOSFET.

Software control: Optimise control algorithms to reduce energy loss and improve conversion efficiency.

Safety and Reliability

Overload protection: design overload protection circuit to prevent damage caused by overload.

Lightning protection measures: Installation of lightning arrester and other protective devices to ensure the safe operation of the equipment under adverse weather conditions.

Network monitoring and maintenance

Remote monitoring: Use IoT technology to realise remote data collection and monitoring.

Intelligent diagnosis: Fault warning through data analysis to reduce maintenance costs.