Title :
A direct control strategy for UPQC in three-phase four-wire system
Author :
Zhili, Tan ; Xun, Li ; Jian, Chen ; Yong, Kang ; Shanxu, Duan
Author_Institution :
Sch. of Electr. & Electron. Eng., Huazhong Univ. of Sci. & Technol., Wuhan
Abstract :
Based on the p-q-r theory, this paper presents a direct control strategy of unified power quality conditioner (UPQC) used in the nonlinear and unbalance three-phase four-wire system. A algorithm of calculating the series compensation current and shunt compensation voltage in the proposed system is introduced. An analysis of the proposed control strategy and its schematic diagram is described in particular. Simulation results using MATLAB/SIMULINK show that the harmonic current, reactive power of load as well as neutral current are compensated well when unbalance and nonlinear occur in load current or unbalance and sag in source voltage, load voltage get balanced and rated and power factor of power source is about unity
Keywords :
mathematics computing; power engineering computing; power supply quality; power system control; power system harmonics; static VAr compensators; MATLAB-SIMULINK simulation; UPQC; direct control strategy; harmonic current; p-q-r theory; reactive power; series compensation current; shunt compensation voltage; three-phase four-wire system; unified power quality conditioner; Circuits; Control systems; Geophysics; Nonlinear control systems; Power engineering and energy; Power quality; Power system harmonics; Reactive power control; Voltage control; Voltage fluctuations; UPQC; direct control strategy; p-q-r theory; three-phase four-wire system;
Conference_Titel :
Power Electronics and Motion Control Conference, 2006. IPEMC 2006. CES/IEEE 5th International
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0448-7
DOI :
10.1109/IPEMC.2006.4778095
