Such issues as harmonic

three-phase imbalance and voltage stability due to reactive power have made the high rise buildings into the weak area of urban power supply quality.The grid in these area needs strengthening management so to assure power supply quality of the integrated power supply network and prevent the power supply equipment from being damaged.In this paper

the power quality problems of high rise civil buildings is studied

the load characteristics of its power supply system

and such power quality issues as three-phase power imbalance

excessive harmonics and low power factor are analyzed.The advantages and disadvantages of relevant power quality control equipmentis analyzed and the optimal solution to this kind of power quality problems is proposed.