Phase lock loop design and novel test schemes for islanding detection

Islanding detection is necessary to detect the loss of the electric power system (EPS). The standard requirement for island detection is described in "IEEE 1547 Standard for Interconnecting Distributed Resources with Electric Power Systems" where an island must be detected within 2 seconds to turn off the distributed resource. Anti-islanding schemes use the fact that each distributed resource (DR) must synchronize to the EPS and the DR cannot regulate voltage. Many methods are possible to detect an island. The methods can be separated in four separate groups: active, passive, hybrid, and supervisory control and data acquisition (SCADA). This paper will discuss a passive method and a few active methods under the non-detection zone and parallel case. Two SCADA methods will be discussed briefly. Based off those results, a few suggestions of improvements and future work will be made.