  The fast depletion of conventional energy sources due to increased energy
demands and environmental concern has motivated power utilities to integrate
more renewable energy sources into their power systems. Due to the intermittent
nature and low or non-existent inertial response of these sources, a high
penetration of RESs can lead to various issues in the operation of power
systems such as oscillations in power system voltage and frequency, increased
harmonic distortion, failure of protective equipment, overloading of
transformers and feeders, and increased line losses. Such problems arise when
the hosting capacity, defined as the maximum RES capacity that can be installed
without having any technical and operational problems, of the network exceeds
its limit due to the increased integration of RESs to the existing network.
This paper reviews the progress made in HC assessment and enhancement of
electrical networks research and development since its inception. Attempts are
also made to highlight the current and future issues involved in HC technology
for the development of an affordable, in-exhaustive, clean and reliable power
supply for longer term benefits
