The implement of carrier based islanding protection

In this paper, carrier based islanding protection is taken as the research objects, and the signal injection equipment and the islanding protection equipment are designed to implement the protection. First, it makes demands on signal injection equipment, and chooses proper signal injection mode, signal frequency and signal source according to the demands; then, it makes demands on islanding protection equipment, and chooses optimal signal detection method, signal processing algorithm and the measurement of voltage and frequency; finally, it establishes the simulation model of DG interconnection system with signal injection and islanding protection using matlab to validate the feasibility of signal injection equipment and islanding protection equipment. Simulation results show that the designed equipments satisfy the requirements and carrier based islanding protection can be implemented reliably.