Simulation And Experimental Study Of Unified Power Quality Controller

With the rapid development of China’s national economy and science and technology, the demand for electricity increased year by year, while the power quality problems are more prominent._Power quality technology is based on the comprehensive management of power electronics technology, power systems, signal processing and control theory and other disciplines intersect the new technology._Unified Power Quality Conditioner (UPQC) is one of the basic unit of a power quality governance.It can compensate for current distortion and reactive power, and can quickly compensate for supply voltage of swells, sags, fluctuations, flicker and short supply phase voltage unbalance and fault interrupt real, existing dynamic voltage restorer.To this end, this paper Ministry of State Grid Corporation of key technology projects "Mass Unified Power Quality Controller key technology and equipment", unified distribution system for power quality controllers were studied, the prototype of the device has a capacity of240KVA.Firstly, the topology of the three-phase three-wire Unified Power Quality Controller and the main circuit topology Analysis, and the establishment of UPQC mathematical model._On the basis of analysis of various detection algorithms, the proposed multi-task detection method._Established a unified power quality controller of series and parallel units are controlled by thought, to compensate for the load side harmonics and reactive current, measured voltage compensating network control strategy purposes.A detailed discussion of240KVA capacity three-phase three-wire UPQC control system design, the use of PSCAD simulation software to build a simulation model of the three-phase three-wire UPQC operation under various conditions for a more comprehensive simulation study, a detailed analysis of validated UPQC system performance detection algorithm and simulation results show that series-parallel side control strategy is effective.Finally, through the240KVAUPQC test prototype experiments verify the correctness of the simulation results proved better achieved UPQC consolidated power grid load input current and input voltage quality regulation.