Study on a large-volume high-performance programmable voltage disturbance source

Based on the separation of the fundamental parts and harmonics parts of a voltage waveform, this paper presents a novel scheme for a large-volume high-performance programmable voltage disturbance source (PVDS). The purposed equipment uses a serial main circuit to reduce the current flowing through the switches and increase the volume of the system. The system has a high stability and precision with a multiple feedback loop, which can simulate various voltage disturbance and supply a test voltage to the voltage quality equipments such as APF, SPQC, UPQC etc. The results of simulation and experiment indicate that the system has a good static and dynamic performance. The proposed method has been verified on a 300 kVA experimental system. Since the system can simulate the three-phase unbalanced voltage, voltage sags, fluctuation and so on. So the proposed system can supply a full voltage test to the related power quality equipments to be tested