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In this paper. the impact of PV as an RES on the distribution network and the associated penetration issues in the electrical system has been comprehensively presented. The importance of PV as a significant source of power and its generation capability is shown as a prelude in this review. The impact of the PV and the major problem associated with the distribution system is reviewed. The voltage and harmonics issues in PV and the nature of complications that arise in the system are further elaborated and discussed. Pertinent standards and guidelines to ensure the successful operation of the PV system are also given with respect to the nature of problems faced. The islanding detection technique can be broadly categorized into two main groups. remote and local techniques.
In the remote technique. the islanding detection technique is based on the power grid side whereas in the local technique. comprising of passive. active and hybrid technique. the islanding detection technique is on the PV inverter’s side. In the former technique. the NDZ can be completely eliminated. however it comes at an expense of complexity and high cost in implementation. In the latter technique. the passive approach is based on measurement of system parameters and the active approach creates perturbation in the system to evaluate the islanding event. The hybrid technique on the other hand incorporates both the active and passive technique in order to overcome their respective drawbacks in order to accurately detect islanding scenario in the system. Finally. the strength and weakness of each method is given to enable researchers and utility engineers to further compare and analyze the feasibility of each method.
