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2 kW Inverter for Grid connected systems

Description

Design and development of an inverter system of 2kW power, thought for grid connected photovoltaic installations.

Financed by

Coordinated by

ITER

Participants

Abstract

The final objective of this project is the development of an electronic AC/DC inverter system for low power, controlled by a microprocessor that involves high performance at low price for solar photovoltaic installations. This way, the electric energy produced can be directly injected into the grid or used in autonomous systems, directly by standardized electrical appliances.

These Inverters will be later installed in the 25 bioclimatic dwellings of ITER. The added value of this system is the costs decrease on its manufacturing. This, joint to the fact that there aren't a lot of power electronic providers, introduces an emergent market of an easily transportable product, so the commercialization of it in the future, at a sensibly lower price than the one existing now in the market, is foreseeable.

Basic Features of the System

The basic features of the suggested system are:

  • Reliable and efficient system that works directly with high voltage of the order of 400V DC with no DC/AC converters or transformers at the input.
  • Steady and good quality (low harmonic content) sinusoidal wave with power factor near unit.
  • Ability of working whether in autonomous mode or grid connected.
  • Modular system, a more inverters can be connected if the installation requires higher power.
  • Use of MWP technology of conmutation in the inverter to conform output wave.
  • High technology converter with MPP (maximum power point) calculation, data acquisition and monitoring.
  • Ability of work in microprocessor mode (without PC), showing data on the control pannel of the inverter or in PC mode, transmiting data by RS232 port.