Research on grid-connected dual frequency inverter and islanding detection

Parameter optimization for active frequency drift with positive feedback islanding detection strategy;

Study on phase lead based islanding detection of grid-connected system;

Anti-islanding detection of power converter based distributed generation systems and mapping method of non-detection zones;

Review of island detection methods of distributed generation;

A program flow diagram and relative hardware circuits are designed,an island detection control unit about is developed,which is capable to inspect an island and prevent it from occurrence effectively.

Island detection is essential function of Grid-connected Photo-voltage systems.

Three Phase Grid-connected Inverter with Islanding Protection Based on One-cycle Control

Anti-islanding is the key problem for pohotovoltaic grid-connected power generation system.

According to the character of grid-connected photovoltaic system,a 500W grid-connected photovoltaic inverter with the function of maximum power point tracking and anti-islanding is designed.

It also specifies the concept of the second kind of islanding effect and illustrates the harmfulness of concrete temperature crack in order to arouse public concerns on the quality of bases of precision machine tools.