Title :
Digital feedback control based Dynamic Voltage Compensator for voltage sag mitigation: Simulation and experimental validation
Author :
Srinath, S. ; Kumar, Chandan ; Selvan, M.P.
Author_Institution :
EEE, Nat. Inst. of Technol., Tiruchirappalli, India
Abstract :
This paper deals with the voltage sag mitigation for a fixed sensitive load by using a Dynamic Voltage Compensator (DVC) connected to the distribution system. DVC consists a power electronic controller, protecting critical loads from disturbances occurring in the supply system and regulating the load voltage against any sag in the supply. The proposed work is confined to balanced sinusoidal systems and unique in not using any transformations to generate the reference voltage. The steady state analysis is considered and the simulation results are presented in MATLAB / SIMULINK. A simple digital feedback control algorithm is formulated using the digital signal processor (DSP) TMS320LF2407. The reference voltage is determined based on the output voltage of suitably designed LEM voltage sensors, leading to simple hardware with reduced computation. The reference signals are tracked using a fixed hysteresis band control and the DVC is realized using three single phase voltage source inverters (VSI).
Keywords :
digital control; digital signal processing chips; feedback; invertors; power distribution control; power supply quality; voltage regulators; MATLAB; SIMULINK; TMS320LF2407 digital signal processor; critical load protection; digital feedback control; distribution system; dynamic voltage compensator; fixed sensitive load; load voltage regulation; power electronic controller; reference voltage; single phase voltage source inverter; voltage sag mitigation; voltage sensor; Hysteresis; Inverters; Sensors; Switches; Voltage control; Voltage fluctuations; Voltage measurement; Digital Signal Processor (DSP); Dynamic Voltage Compensator (DVC); Hysteresis Control; MATLAB/SIMULINK; Power Quality; Voltage Sag; Voltage Source Inverter (VSI);
Conference_Titel :
Industrial and Information Systems (ICIIS), 2012 7th IEEE International Conference on
Conference_Location :
Chennai
Print_ISBN :
978-1-4673-2603-2
DOI :
10.1109/ICIInfS.2012.6304776