The power supply quality is deteriorated due to a large number of non-linear load operations

which causes threats to the safety of the power system and equipment in power system.To understand features of power quality of different load has significance in evaluating the power quality effect caused by the load after being connected to the network and formulating treatment measures accordingly.In this paper

the features of power quality of different load are summarized based on managing the experience of such power quality

which provides valuable reference for evaluating power quality of similar load due to connecting to the network.