Design and simulation of multiple terminal unified power quality conditioner

With the development of smart grid, power quality is becoming a more important issue in distribution network. Distribution system could decide, or be obliged by users, to supply their users with different power quality levels at different prices. This paper presents a novel unified power quality conditioner configuration - Multiple Terminal Unified Power Quality conditioned (MT-UPQC) which is consisted of one series active filter and multiple shunt active filters. The MT-UPQC can compensate for voltage quality problems, harmonic currents fully and reactive current differently according to the requirements of users. The functions of the MT-UPQC as well as the adopted control algorithm are illustrated in the generalized way. A three terminal-UPQC (3T-UPQC) is built up on the PSCAD/EMTDC platform to undergo the detailed design, simulation and verification. The simulation result shows that the proposed approach is effective and flexible.