Design and Implementation of Three-Phase Voltage Flicker Calculation Based on FPGA

This study proposes a method for computing equivalent three-phase voltage flicker using field-programmable gate array (FPGA)-based integrated circuit (IC) to measure the instantaneous voltage vectors. The very high-speed integrated-circuit hardware description language (VHDL) is used to design scheme, which provides high flexibility and technology independence. The instantaneous voltage vector module, management module, and quantification modules are developed to simulate the entire system. Some novel IP (intellectual property) cores, such as CORDIC and FFT, are introduced and adopted. Then the chip based on these IP cores is designed for voltage flicker calculation and is realized by using a signal FPGA (XC3S1500), which can be adopted as a coprocessor with a general-purpose microprocessor. Simulation results of waveforms and field-measured waveforms with voltage flicker disturbances are presented to show the validity of the flicker components obtained in designed IC.